Pub Date : 2023-08-25DOI: 10.30686/1609-9192-2023-4-117-122
V.I. Galkin, E.E. Sheshko
The deepening of open pits wich takes place nowdays leads to a deterioration in the operating conditions of mining and transport equipment in the system of cyclic technology with the use of autotransport, which leads to the inevitability of the introduction of cyclic flow technology with the use of lifting belt conveyors, both traditional and special. In this regard, there is a need to assess the possibilities of their use in specific operating conditions. The technical analysis of lifting systems was performed with the use of traditional belt conveyors in the conditions of Lebedinsky, Mikhailovsky MPK, Karelian Okatysh JSC, as well as sandwich belt high angle conveyors, tubular belts with a special chevron belt, and RopeCon type conveyors. It has been established that for open pits with a productivity above 20 million tons/year, the most promising is sandwich belt high angle conveyor, and for open pits with low productivity, up to 10 million tons/year – tubular high angle conveyors.
{"title":"The possibility of using various types of belt conveyors, with the cyclic-flow technology of deep open pits","authors":"V.I. Galkin, E.E. Sheshko","doi":"10.30686/1609-9192-2023-4-117-122","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-4-117-122","url":null,"abstract":"The deepening of open pits wich takes place nowdays leads to a deterioration in the operating conditions of mining and transport equipment in the system of cyclic technology with the use of autotransport, which leads to the inevitability of the introduction of cyclic flow technology with the use of lifting belt conveyors, both traditional and special. In this regard, there is a need to assess the possibilities of their use in specific operating conditions. The technical analysis of lifting systems was performed with the use of traditional belt conveyors in the conditions of Lebedinsky, Mikhailovsky MPK, Karelian Okatysh JSC, as well as sandwich belt high angle conveyors, tubular belts with a special chevron belt, and RopeCon type conveyors. It has been established that for open pits with a productivity above 20 million tons/year, the most promising is sandwich belt high angle conveyor, and for open pits with low productivity, up to 10 million tons/year – tubular high angle conveyors.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134982145","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 : 2023-08-25DOI: 10.30686/1609-9192-2023-4-124-129
Kh.B. Badarchi, G.F. Balakina
The purpose of the study is to identify the main characteristics of innovation processes in a region where products of the mining sector prevail in the gross product structure, as well as to identify the factors contributing to implementation of innovations and the relationship between the innovation processes and the social and cultural context of the regional development. With the aim of assessing the opportunities for introducing technical innovations in the working practice, the authors conducted an expert survey in June–July 2023 in which top managers and specialists of the leading mining enterprises, business associations and authorities of the region acted as experts. Recommendations for improving innovation practices have been developed based on generalization of the survey data as part of the statistical analysis of general regularities in dynamics of the innovation processes in economies of the developed countries and the Russian Federation. A conclusion is made about the need to develop a state policy to support innovation by strengthening co-operation between mining companies and mediumsized businesses in the region.
{"title":"Expert assessment of opportunities for innovative transformation in a region where mining is the predominant industry","authors":"Kh.B. Badarchi, G.F. Balakina","doi":"10.30686/1609-9192-2023-4-124-129","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-4-124-129","url":null,"abstract":"The purpose of the study is to identify the main characteristics of innovation processes in a region where products of the mining sector prevail in the gross product structure, as well as to identify the factors contributing to implementation of innovations and the relationship between the innovation processes and the social and cultural context of the regional development. With the aim of assessing the opportunities for introducing technical innovations in the working practice, the authors conducted an expert survey in June–July 2023 in which top managers and specialists of the leading mining enterprises, business associations and authorities of the region acted as experts. Recommendations for improving innovation practices have been developed based on generalization of the survey data as part of the statistical analysis of general regularities in dynamics of the innovation processes in economies of the developed countries and the Russian Federation. A conclusion is made about the need to develop a state policy to support innovation by strengthening co-operation between mining companies and mediumsized businesses in the region.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134982322","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}
Places of spontaneous coal combustion cause significant economic losses to the mining operations due to coal losses and accident elimination costs, while toxic gases and high temperatures threaten the health and life of employees. Coal cooling is a necessary condition to eradicate spontaneous fire seats. The most effective way to eliminate spontaneous fires is excavation of heated coal. Coal cooling can take place due to heat exchange with the atmosphere or the supplied refrigerants. The performed studies have shown that air-cooled lignite shows increased oxygen sorption capacity. As the initial temperature of the coal goes up, the activity of cooled coal increases. Thus, if natural coal was characterized with the oxygen sorption rate constant of 0.1348 ml/(g∙h), the coal cooled down upon heating up to 50°C already showed 0.2191 ml/(g∙h), while with coal being heated up to 100°C this parameter went up to 0.3153 ml/(g∙h). The latent time of spontaneous combustion of air-cooled lignite significantly decreases with the increasing heating temperature (2-3 times) due to lignite activation and reduction in its moisture content, which increases the danger of recurrent spontaneous firing. The use of water and water-based compositions for lignite cooling significantly reduces the coal's oxygen sorption rate constant and increases the latent time of spontaneous combustion. Calcium chloride proved to be the most effective means for cooling lignite among the investigated water-based compositions, while liquid glass (sodium silicate) had the least effect. Air cooling of coal leads to intensified emission of carbon monoxide, while cooling with water and water-based compositions reduces the release of this hazardous gas by several times.
{"title":"Assessment of water-based compositions efficiency for cooling place of lignite spontaneous combustion in strip mines","authors":"V.A. Portola, O.I. Cherskikh, S.I. Protasov, E.A. Seregin, I.A. Shvakov","doi":"10.30686/1609-9192-2023-4-89-94","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-4-89-94","url":null,"abstract":"Places of spontaneous coal combustion cause significant economic losses to the mining operations due to coal losses and accident elimination costs, while toxic gases and high temperatures threaten the health and life of employees. Coal cooling is a necessary condition to eradicate spontaneous fire seats. The most effective way to eliminate spontaneous fires is excavation of heated coal. Coal cooling can take place due to heat exchange with the atmosphere or the supplied refrigerants. The performed studies have shown that air-cooled lignite shows increased oxygen sorption capacity. As the initial temperature of the coal goes up, the activity of cooled coal increases. Thus, if natural coal was characterized with the oxygen sorption rate constant of 0.1348 ml/(g∙h), the coal cooled down upon heating up to 50°C already showed 0.2191 ml/(g∙h), while with coal being heated up to 100°C this parameter went up to 0.3153 ml/(g∙h). The latent time of spontaneous combustion of air-cooled lignite significantly decreases with the increasing heating temperature (2-3 times) due to lignite activation and reduction in its moisture content, which increases the danger of recurrent spontaneous firing. The use of water and water-based compositions for lignite cooling significantly reduces the coal's oxygen sorption rate constant and increases the latent time of spontaneous combustion. Calcium chloride proved to be the most effective means for cooling lignite among the investigated water-based compositions, while liquid glass (sodium silicate) had the least effect. Air cooling of coal leads to intensified emission of carbon monoxide, while cooling with water and water-based compositions reduces the release of this hazardous gas by several times.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134981871","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}
The paper discusses the formation of self-similar, hierarchically scaled, fractal properties of ore and ore-free subsystems of blocks within the mineralized zone. It is planned to identify the ore-free invariant blocks to create pillars within the extended producing block boundaries with the size of up to 160 m along the strike and up to 120 m down the dip of the thin veins, for mechanized layer-wise mining from sublevel strikes. Subsystems of the ore and ore-free blocks have similar fractal dimensions and degree of hierarchy, which is close to the coefficient of 2. Application of the method to leave the ore-free intervals as pillars considerably reduces the specific operational costs from 28-34 USD/ton of ore to 16,64 USD/ton due to cutting costs of drilling and blasting operations of the pillar volume (up to 14%) as well as for the mine preparation and stoping operations. The method of leaving pillars in the ore-free intervals makes it possible (1) to abandon the practice of rock and consolidating stowing while cutting the specific costs down to 5.18 USD/ton of ore; (2) to control the rock pressure while mining lode bodies in the vertical extent with cascades up to 120 m and the expected mineralization mining depth of up to 1000 m; (3) to enhance the produced ore grades from 14% to 25% by minimizing the primary dilution from the ore-free intervals.
{"title":"Justification of applicability of the mosaic pillar system in the ore-free blocks in mining of lode gold deposits","authors":"D.N. Ermoshkin, K.Z. Kurmanaliev, V.A. Mansurov, V.I. Mezhelovsky, E.A. Babkin","doi":"10.30686/1609-9192-2023-3-108-114","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-108-114","url":null,"abstract":"The paper discusses the formation of self-similar, hierarchically scaled, fractal properties of ore and ore-free subsystems of blocks within the mineralized zone. It is planned to identify the ore-free invariant blocks to create pillars within the extended producing block boundaries with the size of up to 160 m along the strike and up to 120 m down the dip of the thin veins, for mechanized layer-wise mining from sublevel strikes. Subsystems of the ore and ore-free blocks have similar fractal dimensions and degree of hierarchy, which is close to the coefficient of 2. Application of the method to leave the ore-free intervals as pillars considerably reduces the specific operational costs from 28-34 USD/ton of ore to 16,64 USD/ton due to cutting costs of drilling and blasting operations of the pillar volume (up to 14%) as well as for the mine preparation and stoping operations. The method of leaving pillars in the ore-free intervals makes it possible (1) to abandon the practice of rock and consolidating stowing while cutting the specific costs down to 5.18 USD/ton of ore; (2) to control the rock pressure while mining lode bodies in the vertical extent with cascades up to 120 m and the expected mineralization mining depth of up to 1000 m; (3) to enhance the produced ore grades from 14% to 25% by minimizing the primary dilution from the ore-free intervals.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135856948","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-134-137
A.M. Balashov
In order to reduce the lag in labor productivity, competitiveness and other indicators compared to the developed countries of the world, Russia today pays considerable attention to the state support for the development of digital technologies and digitalization of the production processes. Digital technologies are now increasingly penetrating into traditional industries, contributing to a more optimal use of resources and increasing the efficiency of business processes. The article discusses the issues of digitalization of production processes in mining operations. Introduction of advanced digital and information technologies into the work system of mining enterprises ensures the transition to continuous monitoring of their production processes, improves the level of safety in mining operations, promotes more optimal use of resources and increases competitiveness of the companies. All of this makes significant changes in the working methods and management processes of the companies, while creating favourable conditions for introduction of innovations.
{"title":"Trends in digitalization of production processes in mining","authors":"A.M. Balashov","doi":"10.30686/1609-9192-2023-3-134-137","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-134-137","url":null,"abstract":"In order to reduce the lag in labor productivity, competitiveness and other indicators compared to the developed countries of the world, Russia today pays considerable attention to the state support for the development of digital technologies and digitalization of the production processes. Digital technologies are now increasingly penetrating into traditional industries, contributing to a more optimal use of resources and increasing the efficiency of business processes. The article discusses the issues of digitalization of production processes in mining operations. Introduction of advanced digital and information technologies into the work system of mining enterprises ensures the transition to continuous monitoring of their production processes, improves the level of safety in mining operations, promotes more optimal use of resources and increases competitiveness of the companies. All of this makes significant changes in the working methods and management processes of the companies, while creating favourable conditions for introduction of innovations.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135857232","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-122-128
A.S. Opalev, A.A. Cherezov
The paper analyzes the tasks of producing high-quality iron ore concentrates suitable for nonblast-furnace metallurgy and the challenges of processing magnetite ores with the current technological level of dressing equipment and technologies. One of the best methods to improve the quality and the grade of iron ore raw materials is the use of magnetic gravity separation in the technological process, which allows selective separation of the liberated magnetite particles from their aggregates in processing of undersize products of fine vibrating screening. This trend is implemented in the innovative magnetite ore processing technology that uses the principle of the staged output of finished concentrate. The technology makes it possible to produce a high-quality concentrate after the first grinding stage. The magnetic gravity separation has undergone industrial validation, has proven its efficiency in practice, and has become widespread at mining and processing plants not only in Russia, but also in the CIS countries. Over 180 MGS-2.0 magnetic gravity separators produced by Russian manufacturers have already been or are being implemented at various Russian and CIS companies. Industrial separators are equipped with modern automation systems providing high technological separation performance, have no rotating parts and are simple in design. The authors continue R&D works on creation of automated control systems for the magnetic gravity separation process based on designing digital models adapted for introduction into the plant’s automated process control systems.
{"title":"Experience in the development of magnetic gravity separation at enterprises in Russia and CIS countries to improve the quality of iron ore raw materials","authors":"A.S. Opalev, A.A. Cherezov","doi":"10.30686/1609-9192-2023-3-122-128","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-122-128","url":null,"abstract":"The paper analyzes the tasks of producing high-quality iron ore concentrates suitable for nonblast-furnace metallurgy and the challenges of processing magnetite ores with the current technological level of dressing equipment and technologies. One of the best methods to improve the quality and the grade of iron ore raw materials is the use of magnetic gravity separation in the technological process, which allows selective separation of the liberated magnetite particles from their aggregates in processing of undersize products of fine vibrating screening. This trend is implemented in the innovative magnetite ore processing technology that uses the principle of the staged output of finished concentrate. The technology makes it possible to produce a high-quality concentrate after the first grinding stage. The magnetic gravity separation has undergone industrial validation, has proven its efficiency in practice, and has become widespread at mining and processing plants not only in Russia, but also in the CIS countries. Over 180 MGS-2.0 magnetic gravity separators produced by Russian manufacturers have already been or are being implemented at various Russian and CIS companies. Industrial separators are equipped with modern automation systems providing high technological separation performance, have no rotating parts and are simple in design. The authors continue R&D works on creation of automated control systems for the magnetic gravity separation process based on designing digital models adapted for introduction into the plant’s automated process control systems.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135857234","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-78-87
V.B. Kondratiev
As the second largest economy in the world, China plays an important role in the global mineral resources sector. China's mineral resources are vast and different, and the country is now the world's leading producer of a number of important metals and minerals. Mining has been key factor in China's economic growth and has contributed to the country's rapid development over the past three decades. The industry has played an important role in the country's industrialization process, providing raw materials for the growing demand for resources. China has actively pursued overseas projects with government support, encouraging companies to expand their operations abroad. China is now playing an increasingly important role in the global mining industry, investing in mineral deposits in many countries around the world. With more and more international mergers and acquisitions, Chinese companies have begun to apply Western technologies and management to their domestic and overseas exploration and mining projects more consistently. China’s industrial sector accounts for about 40% of the gross domestic product, which is significantly higher than the percentage for other major economies in the world. The large and growing industrial base is helping keep downstream demand strong and supporting the mineral industry’s move to expand. It also contributes to increased foreign capital investment, exports, and employment, all of which are the key factors in socioeconomic development. In other words, the mineral industry primary purpose is to offer energy resources, metallic materials, and non-metallic minerals for the development of other industries, and extensive and multi-level direct and indirect links with other industries in the country. China's mining industry has also become a crucial factor in the development of the global economy, as using innovative technologies the country effectively mines minerals such as tantalum, niobium, lithium, rare earth elements, scandium, germanium, gallium, indium, rhenium, tellurium and arsenic, which are scarce in the USA, Europe and other Western countries.
{"title":"China in Global Mining Industry","authors":"V.B. Kondratiev","doi":"10.30686/1609-9192-2023-3-78-87","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-78-87","url":null,"abstract":"As the second largest economy in the world, China plays an important role in the global mineral resources sector. China's mineral resources are vast and different, and the country is now the world's leading producer of a number of important metals and minerals. Mining has been key factor in China's economic growth and has contributed to the country's rapid development over the past three decades. The industry has played an important role in the country's industrialization process, providing raw materials for the growing demand for resources. China has actively pursued overseas projects with government support, encouraging companies to expand their operations abroad. China is now playing an increasingly important role in the global mining industry, investing in mineral deposits in many countries around the world. With more and more international mergers and acquisitions, Chinese companies have begun to apply Western technologies and management to their domestic and overseas exploration and mining projects more consistently. China’s industrial sector accounts for about 40% of the gross domestic product, which is significantly higher than the percentage for other major economies in the world. The large and growing industrial base is helping keep downstream demand strong and supporting the mineral industry’s move to expand. It also contributes to increased foreign capital investment, exports, and employment, all of which are the key factors in socioeconomic development. In other words, the mineral industry primary purpose is to offer energy resources, metallic materials, and non-metallic minerals for the development of other industries, and extensive and multi-level direct and indirect links with other industries in the country. China's mining industry has also become a crucial factor in the development of the global economy, as using innovative technologies the country effectively mines minerals such as tantalum, niobium, lithium, rare earth elements, scandium, germanium, gallium, indium, rhenium, tellurium and arsenic, which are scarce in the USA, Europe and other Western countries.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135856945","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-138-142
N.D. Kharitonov
The article is a study dedicated to the development of a method for evaluating the impact of infrastructure on financial performance for mineral resource development. The author of the article justifies the need for the development of a new method that will allow for a more accurate assessment of the impact of infrastructure on financial and economic indicators of mineral resource development. The article discusses the main components of the method, such as infrastructure analysis and determining the relationship between financial indicators and infrastructure features. As a result of the study, coefficients were developed and taken into account for evaluating mineral deposits, such as water supply, transportation infrastructure, social infrastructure, and energy supply of nearby areas. One of the main advantages of the developed method is its practical applicability. It can be used both at the planning stage and during the implementation of projects in the field of mineral resource development. The evaluation results can help make decisions on optimizing infrastructure and improving project financial indicators. The research results are of interest to specialists in the field of geology, economics, and natural resource management.
{"title":"Designing of a method to assess the impact of infrastructure factors on financialand economic indicators of mineral resource development","authors":"N.D. Kharitonov","doi":"10.30686/1609-9192-2023-3-138-142","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-138-142","url":null,"abstract":"The article is a study dedicated to the development of a method for evaluating the impact of infrastructure on financial performance for mineral resource development. The author of the article justifies the need for the development of a new method that will allow for a more accurate assessment of the impact of infrastructure on financial and economic indicators of mineral resource development. The article discusses the main components of the method, such as infrastructure analysis and determining the relationship between financial indicators and infrastructure features. As a result of the study, coefficients were developed and taken into account for evaluating mineral deposits, such as water supply, transportation infrastructure, social infrastructure, and energy supply of nearby areas. One of the main advantages of the developed method is its practical applicability. It can be used both at the planning stage and during the implementation of projects in the field of mineral resource development. The evaluation results can help make decisions on optimizing infrastructure and improving project financial indicators. The research results are of interest to specialists in the field of geology, economics, and natural resource management.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135856946","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-116-121
A.S. Kalyuzhny
Most of the enterprises applying open-pit mining method at deposits face challenges of pit wall steepening when approaching the pit wall to the final position or reducing productivity. The main task when increasing the angle of pit slope is to determine its stability. One of the ways to steepen the open-pit wall is to increase the slope angle of benches composing the open-pit wall. The bench stability is primarily determined by its physical properties and structural uncertainty. The higher the strength properties of rocks, the steeper the slope angle formed in these rocks can be. The "Rules of stability..." provide for the possible accounting the loads from mining equipment when assessing the stability, but this possibility is provided for the calculation of bench stability of open-pits and cuts, formed by semi-hard and dispersed rocks, dumps formed from clay or semi-hard rocks and (or) from a mixture of clay and hard rocks. At the same time, it is of interest to assess the impact of static loading from the located mining transport equipment in a stationary state on the stability of the benches located in hard rocks. It is shown that the load from the track dozer scraping the berms has an impact of no more than 6-7% for a distance of about 15 m from the top crest of a 30-meter long bench with a slope angle of 80° to the edge of the track, which is generally insignificant for maintaining bench stability. The minimum value of the safety factor of the bench with the load from the BELAZ-75306 mining dump truck is at a distance of 8 to 10 m from the top crest to the edge of the wheel. That is, at this distance the mining dump truck has the maximum impact. At 30 m distance from the bench’s top crest, mining dump truck has no impact on the bench stability. The maximum impact of the dump truck on the stability is 22 to 25%.
{"title":"Impact of static loading from mining equipment on the bench stability in hard rocks","authors":"A.S. Kalyuzhny","doi":"10.30686/1609-9192-2023-3-116-121","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-116-121","url":null,"abstract":"Most of the enterprises applying open-pit mining method at deposits face challenges of pit wall steepening when approaching the pit wall to the final position or reducing productivity. The main task when increasing the angle of pit slope is to determine its stability. One of the ways to steepen the open-pit wall is to increase the slope angle of benches composing the open-pit wall. The bench stability is primarily determined by its physical properties and structural uncertainty. The higher the strength properties of rocks, the steeper the slope angle formed in these rocks can be. The \"Rules of stability...\" provide for the possible accounting the loads from mining equipment when assessing the stability, but this possibility is provided for the calculation of bench stability of open-pits and cuts, formed by semi-hard and dispersed rocks, dumps formed from clay or semi-hard rocks and (or) from a mixture of clay and hard rocks. At the same time, it is of interest to assess the impact of static loading from the located mining transport equipment in a stationary state on the stability of the benches located in hard rocks. It is shown that the load from the track dozer scraping the berms has an impact of no more than 6-7% for a distance of about 15 m from the top crest of a 30-meter long bench with a slope angle of 80° to the edge of the track, which is generally insignificant for maintaining bench stability. The minimum value of the safety factor of the bench with the load from the BELAZ-75306 mining dump truck is at a distance of 8 to 10 m from the top crest to the edge of the wheel. That is, at this distance the mining dump truck has the maximum impact. At 30 m distance from the bench’s top crest, mining dump truck has no impact on the bench stability. The maximum impact of the dump truck on the stability is 22 to 25%.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135856951","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 : 2023-07-01DOI: 10.30686/1609-9192-2023-3-48-49
D.V. Zhabin, M.A. Makeyev, D.A. Klebanov
he article describes the problem of monitoring the integrity and condition of the teeth of mining excavators based on computer vision. IN the article defined the possible evaluation of computer vision algorithms that can be applied to solve this problem. In the article presented the architecture of the software and hardware for the implementation of this class of systems.
{"title":"Monitoring the loss and integrity of the excavator bucket teeth based on computer vision methods","authors":"D.V. Zhabin, M.A. Makeyev, D.A. Klebanov","doi":"10.30686/1609-9192-2023-3-48-49","DOIUrl":"https://doi.org/10.30686/1609-9192-2023-3-48-49","url":null,"abstract":"he article describes the problem of monitoring the integrity and condition of the teeth of mining excavators based on computer vision. IN the article defined the possible evaluation of computer vision algorithms that can be applied to solve this problem. In the article presented the architecture of the software and hardware for the implementation of this class of systems.","PeriodicalId":36119,"journal":{"name":"Gornaya Promyshlennost","volume":"399 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135856952","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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