Pub Date : 2023-06-30DOI: 10.33271/mining17.02.082
A. Salkynov, Arailym Rymkulova, A. Suimbayeva, Sh.B. Zeitinova
Purpose. Determining the patterns for geomechanical state changes in the rock mass, depending on the stoping face technological parameters for sloping ore deposits. Methods. The state-of-the-art CAE Fidesys strength analysis system has been adopted to conduct the research on geomechanical processes around the stoping face, which is effective in a flat formulation. The system used provides a complete engineering process cycle from the preparation of the calculation model to the visualization of the calculation results. The real physical-mechanical properties of ores and host rocks of the Zhezkazgan field (Kazakhstan) are the initial data. Findings. As a research result, the patterns of change in the stress-strain state around the stoping face have been obtained, namely, the maximum tensile and compressive deformations in the room fenders and rocks of a parting, depending on its thickness (from 0 to 10 m). Based on the data obtained, it has been revealed that in the studied mining-geological conditions, elastic deformations predominate around the stoping face. Originality. As a result of conducted numerical experimental studies, a new solution is proposed for an important scientific problem related to predicting the natural and technogenic geomechanical state of the rock mass. Practical implications. The results obtained make it possible to develop technical solutions for the modernization of the room-and-pillar (panel-and-pillar) mining system under conditions of sloping fall of ore bodies in the conditions of the Zhezkazgan field.
{"title":"Research into deformation processes in the rock mass surrounding the stoping face when mining sloping ore deposits)","authors":"A. Salkynov, Arailym Rymkulova, A. Suimbayeva, Sh.B. Zeitinova","doi":"10.33271/mining17.02.082","DOIUrl":"https://doi.org/10.33271/mining17.02.082","url":null,"abstract":"Purpose. Determining the patterns for geomechanical state changes in the rock mass, depending on the stoping face technological parameters for sloping ore deposits. Methods. The state-of-the-art CAE Fidesys strength analysis system has been adopted to conduct the research on geomechanical processes around the stoping face, which is effective in a flat formulation. The system used provides a complete engineering process cycle from the preparation of the calculation model to the visualization of the calculation results. The real physical-mechanical properties of ores and host rocks of the Zhezkazgan field (Kazakhstan) are the initial data. Findings. As a research result, the patterns of change in the stress-strain state around the stoping face have been obtained, namely, the maximum tensile and compressive deformations in the room fenders and rocks of a parting, depending on its thickness (from 0 to 10 m). Based on the data obtained, it has been revealed that in the studied mining-geological conditions, elastic deformations predominate around the stoping face. Originality. As a result of conducted numerical experimental studies, a new solution is proposed for an important scientific problem related to predicting the natural and technogenic geomechanical state of the rock mass. Practical implications. The results obtained make it possible to develop technical solutions for the modernization of the room-and-pillar (panel-and-pillar) mining system under conditions of sloping fall of ore bodies in the conditions of the Zhezkazgan field.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43663984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.091
H. Symanovych, M. Odnovol, V. Yakovenko, R. Sachko, I. Shaikhlislamova, T. Reshetilova, M. Stadnichuk
Purpose. Geomechanical substantiation and determination of the parting state parameters for specific mining-geological and mining-technical conditions based on the analysis in order to substantiate the safe operating conditions of the undermined main working network. Methods. An algorithm for studying the state of the undermined main working network includes: analysis of the texture and mechanical properties of parting rocks; mine instrumental observations of the rock pressure manifestations in the main workings; modeling of the parting state using the finite element method (FEM); calculation and analysis of its stress-strain state (SSS) with prediction of the degree of stope operations influence on possible violations of the requirements to safety rules for the main working network operation. Findings. The texture peculiarities and mechanical properties of lithotypes around the network of main workings, the parting and the zone of future stope operations in the lower seam have been analyzed. The current state of the main workings has been studied and, together with the preliminary analysis, the rock pressure manifestations with an emphasis on the probable stope operations influence in the lower seam are predicted. For the final solution of this issue, the parameters have been substantiated and a geomechanical model of a parting behavior has been developed. Having calculated and analyzed the SSS of parting rocks, the conclusion can be drawn about the possibility of safe operation of the main working network. Originality. New knowledge has been gained about the peculiarities of distributing SSS components in the parting, which are distinguished by its large thickness (about 100 m), but by weak strength properties of all lithotypes without exception, which are further reduced by weakening factors of fracturing, stratification and moisture from a large number of coal seams occurring throughout the height of a parting. To study the state of a parting, for the first time, a spatial geomechanical model has been validated and constructed, taking into account all the elements reflecting mining-technical situation. Practical implications. Based on the analysis of parting SSS, the existence of its stable part with a thickness of about 37 m has been proven, which ensures the absence of the stope operations influence in the lower seam on the state of the main working network of the upper horizon, that is, the safe conditions for their operation have been substantiated. The conducted research is the basis for the development of recommendations for ensuring accident-free operation.
{"title":"Assessing the geomechanical state of the main working network state in the case of undermining in the conditions of weak rocks","authors":"H. Symanovych, M. Odnovol, V. Yakovenko, R. Sachko, I. Shaikhlislamova, T. Reshetilova, M. Stadnichuk","doi":"10.33271/mining17.02.091","DOIUrl":"https://doi.org/10.33271/mining17.02.091","url":null,"abstract":"Purpose. Geomechanical substantiation and determination of the parting state parameters for specific mining-geological and mining-technical conditions based on the analysis in order to substantiate the safe operating conditions of the undermined main working network. Methods. An algorithm for studying the state of the undermined main working network includes: analysis of the texture and mechanical properties of parting rocks; mine instrumental observations of the rock pressure manifestations in the main workings; modeling of the parting state using the finite element method (FEM); calculation and analysis of its stress-strain state (SSS) with prediction of the degree of stope operations influence on possible violations of the requirements to safety rules for the main working network operation. Findings. The texture peculiarities and mechanical properties of lithotypes around the network of main workings, the parting and the zone of future stope operations in the lower seam have been analyzed. The current state of the main workings has been studied and, together with the preliminary analysis, the rock pressure manifestations with an emphasis on the probable stope operations influence in the lower seam are predicted. For the final solution of this issue, the parameters have been substantiated and a geomechanical model of a parting behavior has been developed. Having calculated and analyzed the SSS of parting rocks, the conclusion can be drawn about the possibility of safe operation of the main working network. Originality. New knowledge has been gained about the peculiarities of distributing SSS components in the parting, which are distinguished by its large thickness (about 100 m), but by weak strength properties of all lithotypes without exception, which are further reduced by weakening factors of fracturing, stratification and moisture from a large number of coal seams occurring throughout the height of a parting. To study the state of a parting, for the first time, a spatial geomechanical model has been validated and constructed, taking into account all the elements reflecting mining-technical situation. Practical implications. Based on the analysis of parting SSS, the existence of its stable part with a thickness of about 37 m has been proven, which ensures the absence of the stope operations influence in the lower seam on the state of the main working network of the upper horizon, that is, the safe conditions for their operation have been substantiated. The conducted research is the basis for the development of recommendations for ensuring accident-free operation.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45446822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.001
A. Koveria, L. Kieush, Andrii Usenko, A. Sova
Purpose. The work aims to study the effect of cellulose on the caking properties of various types of coking coal used in coking blends. The change in caking abilities has been analyzed to achieve the aim using standard techniques. At the same time, the effect of biomass additives on the plastic properties of coal has been analyzed comprehensively; the optimal amount of additive for practical purposes has been determined. Methods. Multiple coal characteristics in the plastic stage have been studied using a dilatometric method, the enhanced swelling pressure method, the plastometric method, and the Roga index test. The first three methods make it possible to characterize the caking properties of coal; and the Roga index test characterizes its coking ability. Findings. It has been identified that the optimal amount of biomass additive to study the effect on the properties of coal in the plastic state is more than 5 wt. %. In the paper, experimental dependences of the 5 wt. % cellulose addition influence on the caking properties of four coal grades have been obtained. The results showed a slight decrease in caking properties in terms of swelling, swelling pressure, thickness of the plastic layer, and caking ability. Simultaneously, the most sensitive methods for assessing the effect of cellulose addition on the coal plastic properties are the dilatometric method as well as the enhanced method for the swelling pressure determination. Originality. A comprehensive study of the effect of pure cellulose as a component of lignocellulose biomass on the properties of different coal grades in the plastic state (i.e. caking prperteis) has been carried out. A slight change in the coal properties in the plastic state with adding 5 wt. % cellulose, decreasing caking properties, has been shown. An important, not previously reported, conclusion is that the cellulose additive does not have any noticeable effect on the physical properties of the coal charge owing to its loose structure. Practical implications. A slight change in the caking properties of coal has been established with the addition of 5 wt. % which is of practical importance for the preparation of coal blends, and the coke production in the cases of using additives of lignocellulosic biomass without losing its quality. Additionally, renewable additive use while obtaining fuels and reducing agents is an approach to mitigate the negative environmental impact.
{"title":"Study of cellulose additive effect on the caking properties of coal","authors":"A. Koveria, L. Kieush, Andrii Usenko, A. Sova","doi":"10.33271/mining17.02.001","DOIUrl":"https://doi.org/10.33271/mining17.02.001","url":null,"abstract":"Purpose. The work aims to study the effect of cellulose on the caking properties of various types of coking coal used in coking blends. The change in caking abilities has been analyzed to achieve the aim using standard techniques. At the same time, the effect of biomass additives on the plastic properties of coal has been analyzed comprehensively; the optimal amount of additive for practical purposes has been determined. Methods. Multiple coal characteristics in the plastic stage have been studied using a dilatometric method, the enhanced swelling pressure method, the plastometric method, and the Roga index test. The first three methods make it possible to characterize the caking properties of coal; and the Roga index test characterizes its coking ability. Findings. It has been identified that the optimal amount of biomass additive to study the effect on the properties of coal in the plastic state is more than 5 wt. %. In the paper, experimental dependences of the 5 wt. % cellulose addition influence on the caking properties of four coal grades have been obtained. The results showed a slight decrease in caking properties in terms of swelling, swelling pressure, thickness of the plastic layer, and caking ability. Simultaneously, the most sensitive methods for assessing the effect of cellulose addition on the coal plastic properties are the dilatometric method as well as the enhanced method for the swelling pressure determination. Originality. A comprehensive study of the effect of pure cellulose as a component of lignocellulose biomass on the properties of different coal grades in the plastic state (i.e. caking prperteis) has been carried out. A slight change in the coal properties in the plastic state with adding 5 wt. % cellulose, decreasing caking properties, has been shown. An important, not previously reported, conclusion is that the cellulose additive does not have any noticeable effect on the physical properties of the coal charge owing to its loose structure. Practical implications. A slight change in the caking properties of coal has been established with the addition of 5 wt. % which is of practical importance for the preparation of coal blends, and the coke production in the cases of using additives of lignocellulosic biomass without losing its quality. Additionally, renewable additive use while obtaining fuels and reducing agents is an approach to mitigate the negative environmental impact.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48496599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.044
R. Kirin, A. Yevstihnieiev, A. Vyprytskyi, S. Sieriebriak
Purpose is analysis of the current legal tools and acts in the field of mining in the European Union to identify and substantiate their potential consideration while reforming Ukrainian legislation in the context of European integration, energy transformation, and postwar recovery. Methods. The study is a sequential analysis of the European sources for legal support of mining. The analysis is aimed at determination of tendencies, their necessity and implementation expediency while reforming the national legislation on subsoil as well as mining legislation. Findings. Elements of the current legal mechanism from the viewpoint of subsoil use in the EU have been reviewed. Moreover, they have been systemized according to following types: tools and institutions; messages (communications) and reports; and directives, instructions, procedural rules, and the EU decisions. Reformation tendencies of legal mining support have been substantiated. The tendencies depend upon the fact that Ukraine selected the Eurointegration vector as well as upon the necessity to decarbonize power sector and postwar recovery specificity. The regulations, relevant for reforming provisions of mining legislation of the certain EU member states required for legal mining support in the field of investment, institutional, permissive, and contractual relations, have been defined. Originality is substantiation of expedient use of sustainable European practices in the legal regulation of Ukrainian mining sector based upon the achievement of symbiosis of preserving the national interests as well as fulfillment of integration obligations in the process of energy transformation and postwar recovery. Practical implications are expedient implementation of the findings in the process of legislative activities; law enforcement actions by officers of the authorized state bodies and economic entities in the field of mining; and research connected with further development of mining law theory; and academic activities related to teaching of topics concerning the current legal aspects of mining.
{"title":"Legal aspects of mining in Ukraine: European integration vector","authors":"R. Kirin, A. Yevstihnieiev, A. Vyprytskyi, S. Sieriebriak","doi":"10.33271/mining17.02.044","DOIUrl":"https://doi.org/10.33271/mining17.02.044","url":null,"abstract":"Purpose is analysis of the current legal tools and acts in the field of mining in the European Union to identify and substantiate their potential consideration while reforming Ukrainian legislation in the context of European integration, energy transformation, and postwar recovery. Methods. The study is a sequential analysis of the European sources for legal support of mining. The analysis is aimed at determination of tendencies, their necessity and implementation expediency while reforming the national legislation on subsoil as well as mining legislation. Findings. Elements of the current legal mechanism from the viewpoint of subsoil use in the EU have been reviewed. Moreover, they have been systemized according to following types: tools and institutions; messages (communications) and reports; and directives, instructions, procedural rules, and the EU decisions. Reformation tendencies of legal mining support have been substantiated. The tendencies depend upon the fact that Ukraine selected the Eurointegration vector as well as upon the necessity to decarbonize power sector and postwar recovery specificity. The regulations, relevant for reforming provisions of mining legislation of the certain EU member states required for legal mining support in the field of investment, institutional, permissive, and contractual relations, have been defined. Originality is substantiation of expedient use of sustainable European practices in the legal regulation of Ukrainian mining sector based upon the achievement of symbiosis of preserving the national interests as well as fulfillment of integration obligations in the process of energy transformation and postwar recovery. Practical implications are expedient implementation of the findings in the process of legislative activities; law enforcement actions by officers of the authorized state bodies and economic entities in the field of mining; and research connected with further development of mining law theory; and academic activities related to teaching of topics concerning the current legal aspects of mining.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42298519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.121
A. Mohamed, A. Omran, M. T. Mohamed, B. Nabawy
Purpose. The research is aimed at evaluating the petrophysical characteristics of the Late Cretaceous Matulla Formation in the central part of the Gulf of Suez in order to detect its hydrocarbon reservoir potential. Methods. Well logs from five wells (Muzhil-1, -2, -4, -7, -8) were used to evaluate the Matulla reservoirs based on a computerized approach. Petrophysical parameters and fluid types were calculated, verified using core data, and represented vertically as lithosaturation cross plots and laterally as isoparametric variation maps.. Findings. Evaluation of total porosity (Φt), effective porosity (Φe), shale content (Vsh), water saturation (Sw), permeability (K), bulk volume of water (BVW), and net pay characteristics of Matulla Formation in the Muzhil wells showed the following weighted average values: 18-23%, 15-19%, 21-40%, 20-100%, 1.1-281 mD, 3-21% and 0-83 ft, respectively. The Log-derived lithology identification indicates that the major matrix component of the Matulla Formation is quartzose sandstone with minor shale and carbonate contents. The upper zone is a poor reservoir, while the middle and lower zones are considered good reservoirs in all studied wells. It is expected that Muzhil-2 will produce oil without water; however, Muzhil-1 and Muzhil-4 will produce oil with water; while Muzhil-7 and Muzhil-8 will produce water only. Originality. Detailed log-derived petrophysical evaluation, verified by core analysis and well tests (DST and MDT), construction of lithosaturation cross plots for each well and isoparametric petrophysical maps are performed for the first time for Matulla Formation in the Muzhil field. Practical implications. The obtained results on lithosaturation and petrophysics have expanded the knowledge about the characteristics of the Matulla Formation sediments, hosting promising reservoir intervals, and should be taken into account in future exploration and development of the Muzhil field.
{"title":"Petrophysical analysis and hydrocarbon potential of the Matulla Formation in the Muzhil Field, central part of the Gulf of Suez, Egypt","authors":"A. Mohamed, A. Omran, M. T. Mohamed, B. Nabawy","doi":"10.33271/mining17.02.121","DOIUrl":"https://doi.org/10.33271/mining17.02.121","url":null,"abstract":"Purpose. The research is aimed at evaluating the petrophysical characteristics of the Late Cretaceous Matulla Formation in the central part of the Gulf of Suez in order to detect its hydrocarbon reservoir potential. Methods. Well logs from five wells (Muzhil-1, -2, -4, -7, -8) were used to evaluate the Matulla reservoirs based on a computerized approach. Petrophysical parameters and fluid types were calculated, verified using core data, and represented vertically as lithosaturation cross plots and laterally as isoparametric variation maps.. Findings. Evaluation of total porosity (Φt), effective porosity (Φe), shale content (Vsh), water saturation (Sw), permeability (K), bulk volume of water (BVW), and net pay characteristics of Matulla Formation in the Muzhil wells showed the following weighted average values: 18-23%, 15-19%, 21-40%, 20-100%, 1.1-281 mD, 3-21% and 0-83 ft, respectively. The Log-derived lithology identification indicates that the major matrix component of the Matulla Formation is quartzose sandstone with minor shale and carbonate contents. The upper zone is a poor reservoir, while the middle and lower zones are considered good reservoirs in all studied wells. It is expected that Muzhil-2 will produce oil without water; however, Muzhil-1 and Muzhil-4 will produce oil with water; while Muzhil-7 and Muzhil-8 will produce water only. Originality. Detailed log-derived petrophysical evaluation, verified by core analysis and well tests (DST and MDT), construction of lithosaturation cross plots for each well and isoparametric petrophysical maps are performed for the first time for Matulla Formation in the Muzhil field. Practical implications. The obtained results on lithosaturation and petrophysics have expanded the knowledge about the characteristics of the Matulla Formation sediments, hosting promising reservoir intervals, and should be taken into account in future exploration and development of the Muzhil field.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42390530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.061
V. Koval, H. Kryshtal, V. Udovychenko, Olha Soloviova, O. Froter, Viktoriia Kokorina, Liudmyla Veretin
Purpose is to substantiate foundations of sustainable management of mineral resources while implementing a circular economy model. Methods. The study has applied following research approaches: synthetic method (unification of the singled out aspects); induction method (analysis of a circular economy features); life cycle assessment (evaluation of the product influence on the environment from the viewpoint of each stage of its life cycle); circular economy toolkit (determination and evaluation of the periodicity of circular economy products and indicators); and circular economy indicator prototype (evaluation of the cyclic product efficiency). Findings. Circular economy is one of the key directions of a sustainable development policy as for conservation and protection of mineral resources; it is aimed at more efficient use and improvement of raw material extraction from industrial waste. Formation of a market infrastructure of the circular economy has been proposed based upon mining sector waste use to process it and reduce as well as to repurpose wasteless production and secondary processing of raw materials. The need has been substantiated to contribute to conservation of mineral resources for their sustainable use on the basis of the development of market infrastructure of a stable economy and mining sector waste use to process it and reduce as well as to repurpose wasteless production and secondary processing of raw materials. Originality. A concept for further development of the circular economy market infrastructure has been specified as a platform of production waste supply/demand to optimize the use and conservation of mineral resources on the principles of sustainable growth. It has been proposed to analyze assessment of business development along the lines of a circular economy while calculating parameters when manufacturing is applying primary mineral resources and industrial waste as a raw material for its further processing. Practical implications. The proposed approach of interaction between economic entities on the basis of a circular economy will provide rational use of mineral resources and contribute to the development of a sector of industrial waste processing. The abovementioned will help terminate decrease in the availability of mineral resources and form new milestones of social development on the principles of environmental friendliness and rationalism in the process of interaction with nature.
{"title":"Review of mineral resource management in a circular economy infrastructure","authors":"V. Koval, H. Kryshtal, V. Udovychenko, Olha Soloviova, O. Froter, Viktoriia Kokorina, Liudmyla Veretin","doi":"10.33271/mining17.02.061","DOIUrl":"https://doi.org/10.33271/mining17.02.061","url":null,"abstract":"Purpose is to substantiate foundations of sustainable management of mineral resources while implementing a circular economy model. Methods. The study has applied following research approaches: synthetic method (unification of the singled out aspects); induction method (analysis of a circular economy features); life cycle assessment (evaluation of the product influence on the environment from the viewpoint of each stage of its life cycle); circular economy toolkit (determination and evaluation of the periodicity of circular economy products and indicators); and circular economy indicator prototype (evaluation of the cyclic product efficiency). Findings. Circular economy is one of the key directions of a sustainable development policy as for conservation and protection of mineral resources; it is aimed at more efficient use and improvement of raw material extraction from industrial waste. Formation of a market infrastructure of the circular economy has been proposed based upon mining sector waste use to process it and reduce as well as to repurpose wasteless production and secondary processing of raw materials. The need has been substantiated to contribute to conservation of mineral resources for their sustainable use on the basis of the development of market infrastructure of a stable economy and mining sector waste use to process it and reduce as well as to repurpose wasteless production and secondary processing of raw materials. Originality. A concept for further development of the circular economy market infrastructure has been specified as a platform of production waste supply/demand to optimize the use and conservation of mineral resources on the principles of sustainable growth. It has been proposed to analyze assessment of business development along the lines of a circular economy while calculating parameters when manufacturing is applying primary mineral resources and industrial waste as a raw material for its further processing. Practical implications. The proposed approach of interaction between economic entities on the basis of a circular economy will provide rational use of mineral resources and contribute to the development of a sector of industrial waste processing. The abovementioned will help terminate decrease in the availability of mineral resources and form new milestones of social development on the principles of environmental friendliness and rationalism in the process of interaction with nature.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43141669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.035
Z. Malanchuk, V. Moshynskyi, Yevhenii Malanchuk, V. Korniyenko, O. Vasylchuk, V. Zaiets, M. Kucheruk
Purpose is to identify a dependence of basalt raw material fine screening upon the operating and structural parameters of sieving equipment. Methods. The research results have been obtained relying upon comparative analysis of basalt raw material fine screening upon the operating and structural parameters of sieving equipment. In this regard, the analyzed grading efficiency characteristics were defined for three densities of basalt rock mass mined in open pits. They are γ = 1.4 g/сm3 for tuff; γ = 2.2 g/сm3 for lava-breccia; and γ = 2.6 g/сm3 for basalt. The rock mass components are extracted selectively and processed separately. Findings. Expediency of complex mining and processing of three basalt rock mass components (being tuff, lava-breccia, and basalt) as well as their selective treatment has been identified. Mathematical modelling has helped generate regression models of fine basalt raw material sieving upon the operating and structural parameters of a screen. The regression models as well as the represented calculation results are indicative of strong correlation between the efficiency of fine basalt raw material screening and the factors involved by the regression models (i.e. rock mass density; inclination angle of a disturbance force of a vibration exciter of a screen; inclination angle of a screen effector; mesh size; specific load on a screen; disturbance frequency of a screen drive; and a screen length). Originality. For the first time, dependencies of fine basalt raw material sieving efficiency upon the operating and structural parameters of a screen have been modelled mathematically. Based upon the multifactor experiment, ideas have been developed concerning the fine grading process; selection of boundaries of each parameter control; and determination of the efficiency as well as a law of changes in technological parameters while controlling them. Practical implications. Use of the findings will help make adequate solutions while selecting instrumental conditions of an operation schedule to prepare basalt raw material for its integrated processing.
{"title":"Impact by the operating and structural parameters of a screen on the technological parameters of vibratory basalt sieving","authors":"Z. Malanchuk, V. Moshynskyi, Yevhenii Malanchuk, V. Korniyenko, O. Vasylchuk, V. Zaiets, M. Kucheruk","doi":"10.33271/mining17.02.035","DOIUrl":"https://doi.org/10.33271/mining17.02.035","url":null,"abstract":"Purpose is to identify a dependence of basalt raw material fine screening upon the operating and structural parameters of sieving equipment. Methods. The research results have been obtained relying upon comparative analysis of basalt raw material fine screening upon the operating and structural parameters of sieving equipment. In this regard, the analyzed grading efficiency characteristics were defined for three densities of basalt rock mass mined in open pits. They are γ = 1.4 g/сm3 for tuff; γ = 2.2 g/сm3 for lava-breccia; and γ = 2.6 g/сm3 for basalt. The rock mass components are extracted selectively and processed separately. Findings. Expediency of complex mining and processing of three basalt rock mass components (being tuff, lava-breccia, and basalt) as well as their selective treatment has been identified. Mathematical modelling has helped generate regression models of fine basalt raw material sieving upon the operating and structural parameters of a screen. The regression models as well as the represented calculation results are indicative of strong correlation between the efficiency of fine basalt raw material screening and the factors involved by the regression models (i.e. rock mass density; inclination angle of a disturbance force of a vibration exciter of a screen; inclination angle of a screen effector; mesh size; specific load on a screen; disturbance frequency of a screen drive; and a screen length). Originality. For the first time, dependencies of fine basalt raw material sieving efficiency upon the operating and structural parameters of a screen have been modelled mathematically. Based upon the multifactor experiment, ideas have been developed concerning the fine grading process; selection of boundaries of each parameter control; and determination of the efficiency as well as a law of changes in technological parameters while controlling them. Practical implications. Use of the findings will help make adequate solutions while selecting instrumental conditions of an operation schedule to prepare basalt raw material for its integrated processing.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45551761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.009
D. Babets, O. Sdvyzhkova, S. Hapieiev, O. Shashenko, V. Vasyl
Purpose. Creating a generalized algorithm to account for factors (coal seam thickness, enclosed rock mechanical properties, the dimension and bearing capacity of artificial support patterns) causing a gateroad state under the effect of longwall face and goaf. Methods. The assessment of the gateroad stability is based on numerical simulation of the rock stress-strain state (SSS). The finite element method is used to find out the changes in the SSS of surrounding rocks at various stages of longwall mining. The elastic-plastic constitutive model and Hoek-Brown failure criterion implemented in codes RS2 and RS3 (Rocscience) are applied to determine rock displacements dependently on the coal seam thickness, enclosed rock strength, width and strength of artificial support (a packwall comprised of hardening mixture “BI-lining”). To specify the mechanical properties of the packwall material a series of experimental tests were conducted. A computational experiment dealing with 81 combinations of affecting factors was carried out to estimate the roof slag and floor heaving in the gateroad behind the longwall face. A group method of data handling (GMDH ) is employed to generalize the relationships between rock displacements and affecting factors. Findings. The roof-to-floor closure in the gateroad has been determined at the intersection with the longwall face and goaf dependently on the coal seam thickness, enclosed rock strength, width of the packwall, and strength of hardening material. It is revealed that the support material gains the strength value of 30 MPa on the 3rd day from its beginning to use which is fully corresponding to the requirements of protective element bearing capacity. The possibility of using untreated mine water to liquefy the mixture is proved, that allows simplifying and optimizing the solute mixing and pumping technology. Originality. This study contributes to improving the understanding of the factors that influence the stability of underground mining operations and highlights the importance of utilizing numerical simulations in optimizing mining designs. The impact of each factor on the resulting variable (decrease in cross-section of gate road by height) based on the combinatorial algorithm of structural identification of the model is estimated as follows: the packwall width is 48%, the thickness of coal seam is 25%, the strength of enclosing rocks is 23%, and the strength of the packwall material is 4%. Practical implications. The findings provide stakeholders with a technique to determine reasonable parameters for support and protective systems, and the predictive model developed can be used to mitigate potential instability issues in longwall mining excavations. The results have implications under similar geological settings and can be valuable for mine design and optimization in other regions.
{"title":"Multifactorial analysis of a gateroad stability at goaf interface during longwall coal mining – A case study","authors":"D. Babets, O. Sdvyzhkova, S. Hapieiev, O. Shashenko, V. Vasyl","doi":"10.33271/mining17.02.009","DOIUrl":"https://doi.org/10.33271/mining17.02.009","url":null,"abstract":"Purpose. Creating a generalized algorithm to account for factors (coal seam thickness, enclosed rock mechanical properties, the dimension and bearing capacity of artificial support patterns) causing a gateroad state under the effect of longwall face and goaf. Methods. The assessment of the gateroad stability is based on numerical simulation of the rock stress-strain state (SSS). The finite element method is used to find out the changes in the SSS of surrounding rocks at various stages of longwall mining. The elastic-plastic constitutive model and Hoek-Brown failure criterion implemented in codes RS2 and RS3 (Rocscience) are applied to determine rock displacements dependently on the coal seam thickness, enclosed rock strength, width and strength of artificial support (a packwall comprised of hardening mixture “BI-lining”). To specify the mechanical properties of the packwall material a series of experimental tests were conducted. A computational experiment dealing with 81 combinations of affecting factors was carried out to estimate the roof slag and floor heaving in the gateroad behind the longwall face. A group method of data handling (GMDH ) is employed to generalize the relationships between rock displacements and affecting factors. Findings. The roof-to-floor closure in the gateroad has been determined at the intersection with the longwall face and goaf dependently on the coal seam thickness, enclosed rock strength, width of the packwall, and strength of hardening material. It is revealed that the support material gains the strength value of 30 MPa on the 3rd day from its beginning to use which is fully corresponding to the requirements of protective element bearing capacity. The possibility of using untreated mine water to liquefy the mixture is proved, that allows simplifying and optimizing the solute mixing and pumping technology. Originality. This study contributes to improving the understanding of the factors that influence the stability of underground mining operations and highlights the importance of utilizing numerical simulations in optimizing mining designs. The impact of each factor on the resulting variable (decrease in cross-section of gate road by height) based on the combinatorial algorithm of structural identification of the model is estimated as follows: the packwall width is 48%, the thickness of coal seam is 25%, the strength of enclosing rocks is 23%, and the strength of the packwall material is 4%. Practical implications. The findings provide stakeholders with a technique to determine reasonable parameters for support and protective systems, and the predictive model developed can be used to mitigate potential instability issues in longwall mining excavations. The results have implications under similar geological settings and can be valuable for mine design and optimization in other regions.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42937752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.020
Karim Zighmi, F. Zahri, R. Hadji, Kaddour Benmarce, Y. Hamed
Purpose. In the electronics industry, stibium (Sb) is an important element used in the development of silicon-based devices. The metallogenic district of Guelma, known for its polymetallic antimony mineralization, is not currently exploited. The research purpose is to characterize the minerals and gang formations of antimony elements required as dopants during the growth of monocrystalline silicon. Methods. The research methods include detailed geological mapping and sampling, XRD mineralogical identification, XRF geo-chemical analysis, and atomic absorption spectrophotometry. Findings. The results obtained prove that Sb mineralization is the youngest in the North-East of Algeria, since it is hosted in the dolomitized lacustrine limestone of the Mio-Plio-Quaternary. The mineralization has been deposited by the replacement and filling open spaces. A supergene alteration of the Nadorite mineral has led to the antimony sulfides appearance. Originality. Unique mineral species of the world have been identified: Nadorite in Jebel Nador, Flajolotite in Jebel Heimel, valentinite in Jebel Senza, senarmontite in Jebel Hammimat, and cervantite near Aïn Kerma. The Ham-man N’Baïls deposits still contain significant reserves of Zn, Sb, and Pb. Practical implications. With the help of this study, we have answered questions related to the origin of the mineralizing fluids responsible for the formation of deposits. In addition to the epigenetic nature of the mineralization with the formation of unique and rare minerals throughout the world, the presence of gold in this region has been proven by chemical analysis.
意图在电子工业中，锑（Sb）是硅基器件开发中使用的重要元素。Guelma成矿区以多金属锑成矿而闻名，目前尚未开采。本研究的目的是表征单晶硅生长过程中作为掺杂剂所需的锑元素的矿物和帮派形成。方法。研究方法包括详细的地质测绘和采样、XRD矿物学鉴定、XRF地球化学分析和原子吸收分光光度法。调查结果。结果表明，Sb矿化是阿尔及利亚东北部最年轻的，因为它存在于中上新世-第四纪的白云石化湖相石灰岩中。矿化作用是通过置换和填充空地而沉积的。钠长石矿物的表生蚀变导致了锑硫化物的出现。独创性已经确定了世界上独特的矿物种类：杰贝尔纳多尔的Nadorite、杰贝尔海梅尔的Flajolotite、杰贝尔森扎的valentinite、杰贝尔哈米马特的senarmontite和艾因克尔马附近的cervantite。Ham man N'Baïls矿床仍然含有大量的锌、锑和铅储量。实际意义。在这项研究的帮助下，我们回答了与矿床形成的成矿流体起源有关的问题。除了矿化的表观遗传学性质，以及世界各地独特和稀有矿物的形成，化学分析已经证明该地区存在黄金。
{"title":"Polymetallic mineralization hosted in the Neogene sedimentary strata of the Algerian Tellian Range: A comprehensive overview","authors":"Karim Zighmi, F. Zahri, R. Hadji, Kaddour Benmarce, Y. Hamed","doi":"10.33271/mining17.02.020","DOIUrl":"https://doi.org/10.33271/mining17.02.020","url":null,"abstract":"Purpose. In the electronics industry, stibium (Sb) is an important element used in the development of silicon-based devices. The metallogenic district of Guelma, known for its polymetallic antimony mineralization, is not currently exploited. The research purpose is to characterize the minerals and gang formations of antimony elements required as dopants during the growth of monocrystalline silicon. Methods. The research methods include detailed geological mapping and sampling, XRD mineralogical identification, XRF geo-chemical analysis, and atomic absorption spectrophotometry. Findings. The results obtained prove that Sb mineralization is the youngest in the North-East of Algeria, since it is hosted in the dolomitized lacustrine limestone of the Mio-Plio-Quaternary. The mineralization has been deposited by the replacement and filling open spaces. A supergene alteration of the Nadorite mineral has led to the antimony sulfides appearance. Originality. Unique mineral species of the world have been identified: Nadorite in Jebel Nador, Flajolotite in Jebel Heimel, valentinite in Jebel Senza, senarmontite in Jebel Hammimat, and cervantite near Aïn Kerma. The Ham-man N’Baïls deposits still contain significant reserves of Zn, Sb, and Pb. Practical implications. With the help of this study, we have answered questions related to the origin of the mineralizing fluids responsible for the formation of deposits. In addition to the epigenetic nature of the mineralization with the formation of unique and rare minerals throughout the world, the presence of gold in this region has been proven by chemical analysis.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47202923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.33271/mining17.02.071
G. S. Abdelhaffez, Haitham M. Ahmed, H. Saleem
Purpose. The current research aims to study the effect of gold ore grinding on the wear rate of grinding balls. Methods. Six boulder rock samples were selected from some KSA mines; five core samples were taken from each of them to identify the mechanical properties (compressive strength, Young’s modulus, and Poisson’s ratio). These mechanical properties were applied to identify the hardness class of all 30 core samples. Five samples with different mechanical properties from the same boulder sample were milled to study the effect of the compressive strength difference and grinding time on wear rate. Then, six samples were taken from different regions with similar mechanical properties but different petrographic characteristics. They were also milled under the same grinding conditions to study the effect of the microscopic mineral composition on the wear rate. Findings. The results showed that the wear rate increased with the improving mechanical properties and with the increa-sing grinding time. On the other hand, the results based on different microscopic descriptions of the six samples showed that despite similar mechanical properties, the wear rates differed. Petrographic characteristics confirmed the presence of quartz in most of the samples as an associated mineral; it is likely that it has the greatest effect on the grinding ball wear. Originality. The paper proposes a method for investigating ore heterogeneity, which has a major impact on the wear rate during a grinding process, as well as on the reducing costs and improving efficiency of grinding media. Practical implications. The research emphasizes the importance of investigating variables (e.g. ore heterogeneity) other than ball size, grinding medium composition, and wet or dry grinding that have a substantial impact on grinding efficiency. The findings could be applied in feasibility studies to calculate and evaluate grinding costs versus grinding efficiency.
{"title":"Effect of ore heterogeneity on the ball mill wear rate during a grinding process at gold mines of Saudi Arabia (KSA)","authors":"G. S. Abdelhaffez, Haitham M. Ahmed, H. Saleem","doi":"10.33271/mining17.02.071","DOIUrl":"https://doi.org/10.33271/mining17.02.071","url":null,"abstract":"Purpose. The current research aims to study the effect of gold ore grinding on the wear rate of grinding balls. Methods. Six boulder rock samples were selected from some KSA mines; five core samples were taken from each of them to identify the mechanical properties (compressive strength, Young’s modulus, and Poisson’s ratio). These mechanical properties were applied to identify the hardness class of all 30 core samples. Five samples with different mechanical properties from the same boulder sample were milled to study the effect of the compressive strength difference and grinding time on wear rate. Then, six samples were taken from different regions with similar mechanical properties but different petrographic characteristics. They were also milled under the same grinding conditions to study the effect of the microscopic mineral composition on the wear rate. Findings. The results showed that the wear rate increased with the improving mechanical properties and with the increa-sing grinding time. On the other hand, the results based on different microscopic descriptions of the six samples showed that despite similar mechanical properties, the wear rates differed. Petrographic characteristics confirmed the presence of quartz in most of the samples as an associated mineral; it is likely that it has the greatest effect on the grinding ball wear. Originality. The paper proposes a method for investigating ore heterogeneity, which has a major impact on the wear rate during a grinding process, as well as on the reducing costs and improving efficiency of grinding media. Practical implications. The research emphasizes the importance of investigating variables (e.g. ore heterogeneity) other than ball size, grinding medium composition, and wet or dry grinding that have a substantial impact on grinding efficiency. The findings could be applied in feasibility studies to calculate and evaluate grinding costs versus grinding efficiency.","PeriodicalId":43896,"journal":{"name":"Mining of Mineral Deposits","volume":" ","pages":""},"PeriodicalIF":1.9,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47415771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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