Pub Date : 2019-04-27DOI: 10.17073/2500-0632-2019-1-4-15
B. R. Raimzhanov, A. R. Khasanov, R. Vakhitov
The paper presents process layouts for excavation of zones near pit envelope based on the analysis of findings of the ore loss study in case of open-pit mining, as well as the results of field measurements in the quarry faces in Muruntau and Myutenbai open pits. In the course of the field measurements, parameters of the quarry faces at Muruntau and Myutenbai open pits were determined under the following working conditions of an excavator: at full bench with shotpile height of 19–21 m; at full bench with shotpile height of 12–14 m at excavation of the “blast cap”; at heading face and taking ramp material. In all the above-listed quarry faces, the slope angles and the ore mass shotpile height when excavating were measured. Besides, the used excavator type (dragline or hydraulic) was taken into account. For each face, 2–3 measurements were performed, and the average slope angle at the ore mass excavation was determined for each type of excavator. At the next stage of the field measurements, the bench height in the rock mass and the shotpile parameters were measured before and after blasting operations under the following arrangements for preparing the rock mass for excavation: a) under normal conditions, when the ore mass blasting is performed for the selected face or relieving wall of the required thickness; b) in compression with a “blast cap” formation; c) in the marginal parts of the bench. Based on the results of the actual bench height and the blasted rock shotpile parameter field measurements, the following conclusions were drawn: a) the actual slope angles of the quarry faces were 49° when excavating the “blast cap” using dragline excavators, and 53° when excavating the ore mass at full bench regardless of the excavator type used; the slope angles of 49° for the dragline excavator and 53° for the hydraulic excavators were taken for further calculations; b) the width of the marginal (near-envelope) zone, where losses and dilution of balance ore are generated, increased from 7 to 13.0 m (at 49°) and from 7 to 11.3 m (at 53°); as a result, the areas of loss and dilution triangles have increased; c) when blasting in compression conditions, in the upper part of the shotpile, intense mixing of the involved rock and all ore grades occurs, therefore, when excavating the “blast cap”, bulk ore mass mining is only possible. The lower part of the blasted bench preserves the geological structure of the rock mass to a greater degree and can be selectively excavated with separation of the ore mass by grade; d) when blasting the rock mass, to maintain the required pulse direction and the blasting sequence, barren boreholes are included in the breaking outline, which increase the balance ore dilution, and structural dilution arises, which should be taken into account when drawing up the "Methods for determining, limitation and accounting for ore losses and dilution in the course of the Muruntau and Myutenbai (the fifth stage) open-pit mining"; e) when compil
{"title":"The Study of Parameters of Quarry Faces in Muruntau and Myutenbai Open Pits in Case of Applying Major Blasts","authors":"B. R. Raimzhanov, A. R. Khasanov, R. Vakhitov","doi":"10.17073/2500-0632-2019-1-4-15","DOIUrl":"https://doi.org/10.17073/2500-0632-2019-1-4-15","url":null,"abstract":"The paper presents process layouts for excavation of zones near pit envelope based on the analysis of findings of the ore loss study in case of open-pit mining, as well as the results of field measurements in the quarry faces in Muruntau and Myutenbai open pits. In the course of the field measurements, parameters of the quarry faces at Muruntau and Myutenbai open pits were determined under the following working conditions of an excavator: at full bench with shotpile height of 19–21 m; at full bench with shotpile height of 12–14 m at excavation of the “blast cap”; at heading face and taking ramp material. In all the above-listed quarry faces, the slope angles and the ore mass shotpile height when excavating were measured. Besides, the used excavator type (dragline or hydraulic) was taken into account. For each face, 2–3 measurements were performed, and the average slope angle at the ore mass excavation was determined for each type of excavator. At the next stage of the field measurements, the bench height in the rock mass and the shotpile parameters were measured before and after blasting operations under the following arrangements for preparing the rock mass for excavation: a) under normal conditions, when the ore mass blasting is performed for the selected face or relieving wall of the required thickness; b) in compression with a “blast cap” formation; c) in the marginal parts of the bench. Based on the results of the actual bench height and the blasted rock shotpile parameter field measurements, the following conclusions were drawn: a) the actual slope angles of the quarry faces were 49° when excavating the “blast cap” using dragline excavators, and 53° when excavating the ore mass at full bench regardless of the excavator type used; the slope angles of 49° for the dragline excavator and 53° for the hydraulic excavators were taken for further calculations; b) the width of the marginal (near-envelope) zone, where losses and dilution of balance ore are generated, increased from 7 to 13.0 m (at 49°) and from 7 to 11.3 m (at 53°); as a result, the areas of loss and dilution triangles have increased; c) when blasting in compression conditions, in the upper part of the shotpile, intense mixing of the involved rock and all ore grades occurs, therefore, when excavating the “blast cap”, bulk ore mass mining is only possible. The lower part of the blasted bench preserves the geological structure of the rock mass to a greater degree and can be selectively excavated with separation of the ore mass by grade; d) when blasting the rock mass, to maintain the required pulse direction and the blasting sequence, barren boreholes are included in the breaking outline, which increase the balance ore dilution, and structural dilution arises, which should be taken into account when drawing up the \"Methods for determining, limitation and accounting for ore losses and dilution in the course of the Muruntau and Myutenbai (the fifth stage) open-pit mining\"; e) when compil","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90440380","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 : 2018-12-31DOI: 10.17073/2500-0632-2018-4-3-9
V. Margaryan
The regularities of the spatial distribution of the river runoff of the Debed basin, the features of the water regime and the intra-annual runoff distribution caused by the geological and hydrogeological structure of the region and composition of soil were discussed and analyzed. Discussed some issues of regulation and management of river runoff associated with the feature of the geological and hydrogeological structure of the river basin and the composition of soil.
{"title":"GEOLOGICAL AND HYDROGEOLOGICAL STRUCTURE OF RIVER BASINS AND SOIL COMPOSITION AS AN IMPORTANT FACTOR IN THE FORMATION OF THE STREAMFLOW OF THE TERRITORY (ON THE EXAMPLE OF THE DEBED RIVER BASIN)","authors":"V. Margaryan","doi":"10.17073/2500-0632-2018-4-3-9","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-4-3-9","url":null,"abstract":"The regularities of the spatial distribution of the river runoff of the Debed basin, the features of the water regime and the intra-annual runoff distribution caused by the geological and hydrogeological structure of the region and composition of soil were discussed and analyzed. Discussed some issues of regulation and management of river runoff associated with the feature of the geological and hydrogeological structure of the river basin and the composition of soil.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73682513","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 : 2018-12-31DOI: 10.17073/2500-0632-2018-4-10-20
A. Karabutov, E. Cherepetskaya, A. Kravcov, M. Arrigoni
Some non-destructive methods for controlling the internal structure of rocks are described and examples of their use are given. Examples of the use of X-ray and neural tomography, scanning electron and acoustic microscopy are also given. It is shown that the method of laser-ultrasound struktroskopii is promising. Two examples of the use of the latter are given: measuring the local porosity of samples of geomaterials and monitoring changes in the internal structure as a result of electromagnetic exposure.
{"title":"METHODS OF STUDYING THE STRUCTURE AND PROPERTIES OF MOUNTAIN BREEDS ON SAMPLES (QUICK REVIEW)","authors":"A. Karabutov, E. Cherepetskaya, A. Kravcov, M. Arrigoni","doi":"10.17073/2500-0632-2018-4-10-20","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-4-10-20","url":null,"abstract":"Some non-destructive methods for controlling the internal structure of rocks are described and examples of their use are given. Examples of the use of X-ray and neural tomography, scanning electron and acoustic microscopy are also given. It is shown that the method of laser-ultrasound struktroskopii is promising. Two examples of the use of the latter are given: measuring the local porosity of samples of geomaterials and monitoring changes in the internal structure as a result of electromagnetic exposure.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81002682","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 : 2018-12-31DOI: 10.17073/2500-0632-2018-4-34-40
Duyen Phong Nguyen, T. Dang, T. M. Tran, V. Nguyen
Nowaday, in order to resolve the problem of utilities tunnel in large cities is very necessary. The technical pipelines, power cables, plumbing, drainage, ... in the large cities such as Hanoi, Ho Chi Minh is still a problem with no explanation. Within the paper, the method to calculate the anti-tunnel structure of small tunnel by small tunneling machine. In fact, due to the condition of the soil is not good and the limited construction conditions, it is necessary to calculate the composition of the tunnel for the tunnel. For each area to ensure stability, aesthetics, economics, ... for the project.
{"title":"RESEARCH DESIGN LINING FOR UTILITIES TUNNEL IN THE CITY BASED ON STATE OF \"LINING-MASSIF SOIL\"","authors":"Duyen Phong Nguyen, T. Dang, T. M. Tran, V. Nguyen","doi":"10.17073/2500-0632-2018-4-34-40","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-4-34-40","url":null,"abstract":"Nowaday, in order to resolve the problem of utilities tunnel in large cities is very necessary. The technical pipelines, power cables, plumbing, drainage, ... in the large cities such as Hanoi, Ho Chi Minh is still a problem with no explanation. Within the paper, the method to calculate the anti-tunnel structure of small tunnel by small tunneling machine. In fact, due to the condition of the soil is not good and the limited construction conditions, it is necessary to calculate the composition of the tunnel for the tunnel. For each area to ensure stability, aesthetics, economics, ... for the project.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78439311","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 : 2018-12-31DOI: 10.17073/2500-0632-2018-3-3-13
V. Golik, V. Vernigor, V. Kelekhsaev, Yu. Mystrov
Introduction. In a market economy of particular importance are indicators of the quality of raw materials. Loss and decontamination of ores can be achieved by controlling stresses and strains using the residual bearing capacity of the fractured rocks with the primary condition of preserving the earth's surface of destruction. Goals and objectives. The purpose of the study is to substantiate the rational parameters of the technology of the geodynamic safety criterion. The goal is achieved by solving a complex of production due to technical problems, ensuring the correctness of the results, the assessment of geomechanical condition before the development of preventive measures of the impact of mining operations on the environment. Methods. Research methods include system and analysis of theory and practice results, experimental research and scientific forecasting. Results. The value of the criterion of optimum processing technology in the form of preservation of the earth's surface of destruction, such as guarantees of contact of the zone of destruction of the massif of mining, the zone of living matter, flora, fauna and Humans. A detailed understanding of the mechanism of interaction of the structural blocks of a discrete gravitational-tectonic-structural field. The mechanism of manifestation of the residual bearing capacity of the destroyed structural rock separations, the limitation of the degree value, the optimization of the mixture strength and the size of the pillars, the creation of geomechanical balanced segments with the minimization of the costs of the earth's surface condition control are specified. The proposed classification of methods of calculation of extent of the flat roof. The given classification of the methods of array management differs from the assessment of the state of the developed space during the work, after the end of the redemption, and not during the cleaning dredging. An example of the earth's surface conservation is given for the development of a flat-falling field, preserving the earth's surface without filling voids. Conclusion. The processes of control of the state of the masses and the earth's surface are their equivalent, which allows monitoring of the development of the field at all stages of the enterprise's existence. The use of geomechanical factors for the organization of mineral raw materials, mining tool for the implementation of resource-saving and environmental protection trends of mining production and reserve to improve the quality of the extracted ores when to ensure the competitiveness of the enterprise.
{"title":"UNDERGROUND DEVELOPMENT OF ORE DEPOSITS WITH CONSERVATION OF THE GROUND SURFACE","authors":"V. Golik, V. Vernigor, V. Kelekhsaev, Yu. Mystrov","doi":"10.17073/2500-0632-2018-3-3-13","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-3-3-13","url":null,"abstract":"Introduction. In a market economy of particular importance are indicators of the quality of raw materials. Loss and decontamination of ores can be achieved by controlling stresses and strains using the residual bearing capacity of the fractured rocks with the primary condition of preserving the earth's surface of destruction. Goals and objectives. The purpose of the study is to substantiate the rational parameters of the technology of the geodynamic safety criterion. The goal is achieved by solving a complex of production due to technical problems, ensuring the correctness of the results, the assessment of geomechanical condition before the development of preventive measures of the impact of mining operations on the environment. Methods. Research methods include system and analysis of theory and practice results, experimental research and scientific forecasting. Results. The value of the criterion of optimum processing technology in the form of preservation of the earth's surface of destruction, such as guarantees of contact of the zone of destruction of the massif of mining, the zone of living matter, flora, fauna and Humans. A detailed understanding of the mechanism of interaction of the structural blocks of a discrete gravitational-tectonic-structural field. The mechanism of manifestation of the residual bearing capacity of the destroyed structural rock separations, the limitation of the degree value, the optimization of the mixture strength and the size of the pillars, the creation of geomechanical balanced segments with the minimization of the costs of the earth's surface condition control are specified. The proposed classification of methods of calculation of extent of the flat roof. The given classification of the methods of array management differs from the assessment of the state of the developed space during the work, after the end of the redemption, and not during the cleaning dredging. An example of the earth's surface conservation is given for the development of a flat-falling field, preserving the earth's surface without filling voids. Conclusion. The processes of control of the state of the masses and the earth's surface are their equivalent, which allows monitoring of the development of the field at all stages of the enterprise's existence. The use of geomechanical factors for the organization of mineral raw materials, mining tool for the implementation of resource-saving and environmental protection trends of mining production and reserve to improve the quality of the extracted ores when to ensure the competitiveness of the enterprise.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76693497","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 : 2018-08-12DOI: 10.17073/2500-0632-2018-2-51-57
Olga G. Bessimbaeva, E. Khmyrova, F. Nizametdinov, E. Oleinikova
The problems of stability assessment of the quarry’s southern side during the development of the coal seam D6 are considered. To assess the stability of the quarry’s southern side in the development of coalbed outlets, modern research methods are applied: study of the geological structure and analysis of the adjacent rock mass state, the creation of an observation station and the production of observations, calculation of stability of adjacent rock mass of the quarry’s south side and the research results analysis. Quarry’s south side consists of clayey sediments up to 5 m, then siltstones and mudstones up to 10-20 m and a coal seam with a capacity of up to 5 m. The substantiation of the calculated strength characteristics of rocks composing the slopes of the quarry ledges, which determine the stress state of the slopes arising under the influence of internal and external forces, is done. Instrumental observations of the laid station and the survey of cracks on the quarry’s side allowed to determine the contours of the deformation zone and the landslide prism size. A geomechanical model of adjacent rock mass was created and the stability assessment was carried out for the geological section along the line of the maximum development depth. After additional loading on the quarry’s southern side slopes, the safety factor of stability is nу = 1.69−173, which means active phase termination of quarry’s side deformation and sustainable condition.
{"title":"STABILITY ASSESSMENT OF ADJACENT ROCK MASS IN THE DEVELOPMENT OF COALBED OUTLETS","authors":"Olga G. Bessimbaeva, E. Khmyrova, F. Nizametdinov, E. Oleinikova","doi":"10.17073/2500-0632-2018-2-51-57","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-2-51-57","url":null,"abstract":"The problems of stability assessment of the quarry’s southern side during the development of the coal seam D6 are considered. To assess the stability of the quarry’s southern side in the development of coalbed outlets, modern research methods are applied: study of the geological structure and analysis of the adjacent rock mass state, the creation of an observation station and the production of observations, calculation of stability of adjacent rock mass of the quarry’s south side and the research results analysis. Quarry’s south side consists of clayey sediments up to 5 m, then siltstones and mudstones up to 10-20 m and a coal seam with a capacity of up to 5 m. The substantiation of the calculated strength characteristics of rocks composing the slopes of the quarry ledges, which determine the stress state of the slopes arising under the influence of internal and external forces, is done. Instrumental observations of the laid station and the survey of cracks on the quarry’s side allowed to determine the contours of the deformation zone and the landslide prism size. A geomechanical model of adjacent rock mass was created and the stability assessment was carried out for the geological section along the line of the maximum development depth. After additional loading on the quarry’s southern side slopes, the safety factor of stability is nу = 1.69−173, which means active phase termination of quarry’s side deformation and sustainable condition.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"406 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76923242","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 : 2018-08-12DOI: 10.17073/2500-0632-2018-2-23-31
V. L. Osipov
The ore quality requirements include: cutoff grade, minimum thickness of ore body, maximum permissible thickness of interbeds of barren rocks or offgrade ore within the ore body perimeter, minimum metropercent (metrogram) calculated as the product of cutoff grade and minimum ore body thickness. Recently, mineral reserves appraisal has put in practice automation within specialized programs of geological–surveying data processing. The principal subject in automation of ore occurrence delineation in Micromine package and the topic of this article is delimitation of an ore body across its thickness using the data from the ore quality requirements. This becomes necessary when geological data on external boundaries are absent, which is typical of variable morphology ore bodies: mineralized dikes and zones, ore folds, skarns, ore chimneys, etc. Previously, before this study, Micromine package implemented appraisal of composite material reserves in the following scenarios: along boreholes, by benches, by intervals, by geology, by content. The programmers implemented ,since version 16,the ore occurrence algorithm based on the ore quality requirements using a method in a separate menu tab: Drillhole/ Compositing/ Grade (GKZ).The main kinds (parameters) of the ore occurrence algorithm are the Strictly rules and the Relaxed rules.. The article describes general framework of the analysis of ordinary ore occurrences, and similarity and distinctions in performance of the main kinds of the algorithm. Technically, the ore reserves appraisal based on the ore quality requirements should use the algorithm where all the requirements are maximum possible taken into account. In Micromine package, such algorithm is the Strictly Rules with the option “Do not allow contiguous composites”. Practically, there arises multivariate coupling and delimitation of ore bodies in the identified ore occurrences. The article gives a few somewhat formalized examples to illustrate appropriateness of one or the other method of ore occurrence delineation. Automation of ore reserves appraisal results in essential acceleration of data processing. The described algorithms enable calculation and statistical processing of numerous alternatives of ore occurrences based on the input variables of the ore quality requirements: Cб, Mп, Mр, MC within a short time provided that the data are prepared and clean.
{"title":"DELINEATION OF ORE OCCURRENCES IN ORE RESERVES APPRAISAL WITH MICROMINE PACKAGE","authors":"V. L. Osipov","doi":"10.17073/2500-0632-2018-2-23-31","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-2-23-31","url":null,"abstract":"The ore quality requirements include: cutoff grade, minimum thickness of ore body, maximum permissible thickness of interbeds of barren rocks or offgrade ore within the ore body perimeter, minimum metropercent (metrogram) calculated as the product of cutoff grade and minimum ore body thickness. Recently, mineral reserves appraisal has put in practice automation within specialized programs of geological–surveying data processing. The principal subject in automation of ore occurrence delineation in Micromine package and the topic of this article is delimitation of an ore body across its thickness using the data from the ore quality requirements. This becomes necessary when geological data on external boundaries are absent, which is typical of variable morphology ore bodies: mineralized dikes and zones, ore folds, skarns, ore chimneys, etc. Previously, before this study, Micromine package implemented appraisal of composite material reserves in the following scenarios: along boreholes, by benches, by intervals, by geology, by content. The programmers implemented ,since version 16,the ore occurrence algorithm based on the ore quality requirements using a method in a separate menu tab: Drillhole/ Compositing/ Grade (GKZ).The main kinds (parameters) of the ore occurrence algorithm are the Strictly rules and the Relaxed rules.. The article describes general framework of the analysis of ordinary ore occurrences, and similarity and distinctions in performance of the main kinds of the algorithm. Technically, the ore reserves appraisal based on the ore quality requirements should use the algorithm where all the requirements are maximum possible taken into account. In Micromine package, such algorithm is the Strictly Rules with the option “Do not allow contiguous composites”. Practically, there arises multivariate coupling and delimitation of ore bodies in the identified ore occurrences. The article gives a few somewhat formalized examples to illustrate appropriateness of one or the other method of ore occurrence delineation. Automation of ore reserves appraisal results in essential acceleration of data processing. The described algorithms enable calculation and statistical processing of numerous alternatives of ore occurrences based on the input variables of the ore quality requirements: Cб, Mп, Mр, MC within a short time provided that the data are prepared and clean.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90302968","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 : 2018-08-12DOI: 10.17073/2500-0632-2018-2-14-20
N. Zhalgasuly, A. V. Kogut, A. Ismailova
In the conditions of the Zhezkazgan copper deposit, which is worked underground, the losses of ore in the left pillars fluctuate from 12 to 25 %, sometimes reaching 40%. During the development of the Zhezkazgan deposit, tens of millions of tons of rich ore were left in various kinds of losses. The annual increase in ore losses in various parts, taking into account the increasing production, is approximately equal to the annual productivity of the whole mine. Also in the production process so far rich in content of the interlayer copper ores of low power. Therefore, the search for the most effective methods of mining lost, off-balance and waste ores is of paramount importance. One of such methods is underground leaching, which allows to carry out their secondary development and make maximum use of the mineral wealth. The aim of the research was to experimentally study the leaching of oxidized, mixed and sulphide copper ores of the old spent mines in the Zhezkazgan deposit using various solvents. The squeezing of oxide and sulphide rudes was carried out in 2 stages, when the durability of the experimental crests was 35 hours and the durable 294 hours. The oxidant-sulphide ore is 20 mm high and can be cured at 50-80 % media, for 10 months. For the period of time, the chalcocin rudus is derived from 30 to 50 % of media, and from 5 to 12 % of bernital chalcopyrite, which results in the effectiveness of the subsequent method of squeezing the effluent. The best dissolves are acidic acid (5-10 g/l) and acidified sulphate oxide (5 g/l). Residual cystic acid production and development of oxidant processes up to 1.6-3.2 t/t for medium oxidized rudder and up to 2.54.1 t/t for chalcocin rudder, which acts as a catalyst for thawing technical and economic indicators.
{"title":"INVESTIGATION OF LEAVE LEVEL OF COPPER ORE OF ZHEZKAZGAN DEPOSIT","authors":"N. Zhalgasuly, A. V. Kogut, A. Ismailova","doi":"10.17073/2500-0632-2018-2-14-20","DOIUrl":"https://doi.org/10.17073/2500-0632-2018-2-14-20","url":null,"abstract":"In the conditions of the Zhezkazgan copper deposit, which is worked underground, the losses of ore in the left pillars fluctuate from 12 to 25 %, sometimes reaching 40%. During the development of the Zhezkazgan deposit, tens of millions of tons of rich ore were left in various kinds of losses. The annual increase in ore losses in various parts, taking into account the increasing production, is approximately equal to the annual productivity of the whole mine. Also in the production process so far rich in content of the interlayer copper ores of low power. Therefore, the search for the most effective methods of mining lost, off-balance and waste ores is of paramount importance. One of such methods is underground leaching, which allows to carry out their secondary development and make maximum use of the mineral wealth. The aim of the research was to experimentally study the leaching of oxidized, mixed and sulphide copper ores of the old spent mines in the Zhezkazgan deposit using various solvents. The squeezing of oxide and sulphide rudes was carried out in 2 stages, when the durability of the experimental crests was 35 hours and the durable 294 hours. The oxidant-sulphide ore is 20 mm high and can be cured at 50-80 % media, for 10 months. For the period of time, the chalcocin rudus is derived from 30 to 50 % of media, and from 5 to 12 % of bernital chalcopyrite, which results in the effectiveness of the subsequent method of squeezing the effluent. The best dissolves are acidic acid (5-10 g/l) and acidified sulphate oxide (5 g/l). Residual cystic acid production and development of oxidant processes up to 1.6-3.2 t/t for medium oxidized rudder and up to 2.54.1 t/t for chalcocin rudder, which acts as a catalyst for thawing technical and economic indicators.","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74791889","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 : 2018-08-12DOI: 10.17073/2500-0632-2018-2-60-67
A. Protsenko, J. B. Byyrov, G. Fedotov, L. Z. Zartenova
The use of mining and geology information system is becoming more common in modern mining companies; therefore, the competent use of the functionality of software packages and development of appropriated methodologies is a very important and urgent problem. In this paper described method of middle-term planning in mining and geology information system Micromine for underground mining on an example of copper ore deposit with pillar- and-room system. Particular attention was paid to the consideration of economic indicators in determining the sequence of mining. A list of the necessary data for the implementation of this methodologies in the scheduling of underground mining in the software product Micromine is presented. Using of this method allow on planning stage to determine main technical and economic indicators, as well as to estimate efficiency of selected direction of mining. In this paper is provided example of reports and illustrations of results of working of this method in mining and geology information system Micromine.
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Pub Date : 1991-12-01DOI: 10.1016/0167-9031(91)90861-6
Sun Peide
It is still a difficult problem to find the analytical solutions for the gas flow equation, the nonlinear partial differential equation of the radial flow field in the coal seam. The approximate analytical solutions, with variable substitution and proper simplification, that is, the distribution expressions of gas pressure in a radial flow field are developed. The analytical formulas for gas drainage in the coal seam are presented. The numerical calculation with computers demonstrates that the new analytical formulas are accurate and easy to use for the design of a gas drainage system.
{"title":"Distribution of gas pressure in a radial flow field","authors":"Sun Peide","doi":"10.1016/0167-9031(91)90861-6","DOIUrl":"https://doi.org/10.1016/0167-9031(91)90861-6","url":null,"abstract":"<div><p>It is still a difficult problem to find the analytical solutions for the gas flow equation, the nonlinear partial differential equation of the radial flow field in the coal seam. The approximate analytical solutions, with variable substitution and proper simplification, that is, the distribution expressions of gas pressure in a radial flow field are developed. The analytical formulas for gas drainage in the coal seam are presented. The numerical calculation with computers demonstrates that the new analytical formulas are accurate and easy to use for the design of a gas drainage system.</p></div>","PeriodicalId":100929,"journal":{"name":"Mining Science and Technology","volume":"13 3","pages":"Pages 409-415"},"PeriodicalIF":0.0,"publicationDate":"1991-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-9031(91)90861-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91609762","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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