Pub Date : 2024-02-26DOI: 10.1134/s1062739123050022
D. S. Zhurkina, S. V. Lavrikov, A. F. Revuzhenko
Abstract
The study focuses on the connection between two processes: deformation of proppant under the action of rock pressure and the rock pressure change after injection pressure release. The modeling of proppant deformation (mechanics of granular medium) uses the discrete element method, and the rock pressure redistribution (rock mechanics) is modeled using the earlier developed model of rock as a medium with internal energy sources and sinks, and the finite element method. The numerical modeling shows that depending on the loading history and on the rock mass properties, the mode of deformation can be both stable and unstable. For the stable mode of deformation, the pressure balance is calculated at the created fracture boundary, and the change in the proppant porosity is estimated. In the unstable mode, rock mass experiences dynamic events induced by rock pressure.
{"title":"A Model of Joint Rock–Proppant Deformation in Hydraulic Fracturing","authors":"D. S. Zhurkina, S. V. Lavrikov, A. F. Revuzhenko","doi":"10.1134/s1062739123050022","DOIUrl":"https://doi.org/10.1134/s1062739123050022","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study focuses on the connection between two processes: deformation of proppant under the action of rock pressure and the rock pressure change after injection pressure release. The modeling of proppant deformation (mechanics of granular medium) uses the discrete element method, and the rock pressure redistribution (rock mechanics) is modeled using the earlier developed model of rock as a medium with internal energy sources and sinks, and the finite element method. The numerical modeling shows that depending on the loading history and on the rock mass properties, the mode of deformation can be both stable and unstable. For the stable mode of deformation, the pressure balance is calculated at the created fracture boundary, and the change in the proppant porosity is estimated. In the unstable mode, rock mass experiences dynamic events induced by rock pressure.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s1062739123050095
V. I. Kulikov, Z. Z. Sharafiev
Abstract
The authors developed the phenomenological model of landslide initiation under multiple seismic effects. The model uses the lab-scale testing data on mechanisms of slope failure under dynamic impacts, the analysis of a large bulk of field data, the instrumental measurements of seismic effects induced by large-scale blasting and the numerical calculations of influence exerted by seismic vibrations on slopes. The rules are formulated for the decision-making in evaluation of potential landslide initiation under seismic impact. Evaluation of slope stability is performed for overburden rock dumps at open pit mines in the Kursk Magnetic Anomaly. It is shown that large-scale blasts in the test open pit mine have no effect on the stability of the dumps, but the damaged drainage and the rising of underground water can result in accumulation of irreversible deformations.
{"title":"Phenomenological Model for Evaluation of Slope Stability for Overburden Rock Dumps","authors":"V. I. Kulikov, Z. Z. Sharafiev","doi":"10.1134/s1062739123050095","DOIUrl":"https://doi.org/10.1134/s1062739123050095","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The authors developed the phenomenological model of landslide initiation under multiple seismic effects. The model uses the lab-scale testing data on mechanisms of slope failure under dynamic impacts, the analysis of a large bulk of field data, the instrumental measurements of seismic effects induced by large-scale blasting and the numerical calculations of influence exerted by seismic vibrations on slopes. The rules are formulated for the decision-making in evaluation of potential landslide initiation under seismic impact. Evaluation of slope stability is performed for overburden rock dumps at open pit mines in the Kursk Magnetic Anomaly. It is shown that large-scale blasts in the test open pit mine have no effect on the stability of the dumps, but the damaged drainage and the rising of underground water can result in accumulation of irreversible deformations.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s106273912305006x
D. M. Evmenova, N. A. Golikov, I. N. El’tsov
Abstract
The authors show that data on characteristics of drill mud penetration zone improve reliability of geoinformation obtained from borehole geology and geophysics. The developed procedure for the data interpretation takes into account the geomechanics and hydrodynamics of drilling. A part of the drill mud penetration zone is represented by mudcake which prevents direct measurement of porosity and permeability. The article describes the experimental studies on growth of the mudcake on the samples of low-permeable sandstone from the Jurassic reservoir rock mass using an original facility. The petrophysical nonuniformity of the mudcake was determined. The repeated measurements revealed the mudding zone.
{"title":"Experimental Research of Mudcake Formation on Low-Permeable Sandstone Samples","authors":"D. M. Evmenova, N. A. Golikov, I. N. El’tsov","doi":"10.1134/s106273912305006x","DOIUrl":"https://doi.org/10.1134/s106273912305006x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The authors show that data on characteristics of drill mud penetration zone improve reliability of geoinformation obtained from borehole geology and geophysics. The developed procedure for the data interpretation takes into account the geomechanics and hydrodynamics of drilling. A part of the drill mud penetration zone is represented by mudcake which prevents direct measurement of porosity and permeability. The article describes the experimental studies on growth of the mudcake on the samples of low-permeable sandstone from the Jurassic reservoir rock mass using an original facility. The petrophysical nonuniformity of the mudcake was determined. The repeated measurements revealed the mudding zone.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s1062739123050125
V. A. Chanturia, G. P. Dvoichenkova, E. L. Chanturia, A. S. Timofeev
Abstract
The article describes the theoretical and experimental research data on possibility to improve the quality of the end concentrates of float-and-sink, X-ray luminescent, adhesive and froth separation. The method of nitride hardening is proposed for ferrosilicium grain surface with the hardened layer depth in the range of 30–60 nm for reducing ferrosilicium corrosion rate by 2.7 times at the preserved process properties. The necessity of adding the primary float-and-sink flotation circuit with two-stage magnetic separation to decrease the yield of rough concentrates and to improve their quality owing to removal of 29–95% of siderite. The optimized composition of luminophore-bearing modifying agent ensures complete recovery of earlier unrecoverable diamonds in concentrate at the maximum kimberlite yield of 2.5%. The workbench test processing of difficult diamond-bearing raw materials proves the possibility of incremental diamond concentration in adhesive and froth separation (by 14.0% and 12.7%, respectively), and in the cycle of finishing operations in X-ray luminescent separation (by 25.3%) owing to modification of surface properties of diamond crystals using physicochemical methods and energy deposition.
{"title":"Intensification of Basic Processes in Separation of Difficult Diamond-Bearing Raw Materials","authors":"V. A. Chanturia, G. P. Dvoichenkova, E. L. Chanturia, A. S. Timofeev","doi":"10.1134/s1062739123050125","DOIUrl":"https://doi.org/10.1134/s1062739123050125","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article describes the theoretical and experimental research data on possibility to improve the quality of the end concentrates of float-and-sink, X-ray luminescent, adhesive and froth separation. The method of nitride hardening is proposed for ferrosilicium grain surface with the hardened layer depth in the range of 30–60 nm for reducing ferrosilicium corrosion rate by 2.7 times at the preserved process properties. The necessity of adding the primary float-and-sink flotation circuit with two-stage magnetic separation to decrease the yield of rough concentrates and to improve their quality owing to removal of 29–95% of siderite. The optimized composition of luminophore-bearing modifying agent ensures complete recovery of earlier unrecoverable diamonds in concentrate at the maximum kimberlite yield of 2.5%. The workbench test processing of difficult diamond-bearing raw materials proves the possibility of incremental diamond concentration in adhesive and froth separation (by 14.0% and 12.7%, respectively), and in the cycle of finishing operations in X-ray luminescent separation (by 25.3%) owing to modification of surface properties of diamond crystals using physicochemical methods and energy deposition.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s1062739123050137
G. V. Mitrofanova, Yu. P. Pospelova, D. F. Sedinin
Abstract
The article presents the laboratory-scale studies on processibility of fine-grained old tailings at Kovdor GOK. Effect of collecting agents represented by fat tall oil acids (FTOA) is investigated. The froth flotation tests show high selectivity of agent Berol-2015 relative to apatite. From the lab-scale tests, it is found that with collector FTOA, the P2O5 content of concentrate is not higher than 24.4% despite a high degree of desliming of flotation feed ((sim70.0)%). With collector Berol-2015, the concentrate content of P2O5 reaches 35.0–37.7% without preliminary desliming.
{"title":"Processibility of Fine-Grained Magnetite–Apatite Ore Mill Tailings at Kovdor Deposit","authors":"G. V. Mitrofanova, Yu. P. Pospelova, D. F. Sedinin","doi":"10.1134/s1062739123050137","DOIUrl":"https://doi.org/10.1134/s1062739123050137","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article presents the laboratory-scale studies on processibility of fine-grained old tailings at Kovdor GOK. Effect of collecting agents represented by fat tall oil acids (FTOA) is investigated. The froth flotation tests show high selectivity of agent Berol-2015 relative to apatite. From the lab-scale tests, it is found that with collector FTOA, the P<sub>2</sub>O<sub>5</sub> content of concentrate is not higher than 24.4% despite a high degree of desliming of flotation feed (<span>(sim70.0)</span>%). With collector Berol-2015, the concentrate content of P<sub>2</sub>O<sub>5</sub> reaches 35.0–37.7% without preliminary desliming.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s1062739123050149
A. V. Artem’ev, G. V. Mitrofanova
Abstract
By means of determining the suspension effect, the authors studied the change in the surface properties of apatite under the action of reagents and ions present in flotation pulp during processing of apatite-bearing ore. It is shown that the ratio of acid–base centers of apatite surface change in interaction with ions HCO(_3^-), CO(_3^{2-}), HPO(_2^{2-}), cations Ca(^{2 + }) and oleate ions in distilled water and in water after deionization to remove carbon dioxide. The change in apatite surface properties in alkaline water shows up as quantitative superiority of base centers. Such ionization of mineral surface favors adsorption of cations, for example, Ca(^{2 + }), and sets background for more efficient interaction between anion-type agents. The data obtained from the studies of the suspension effect, correlate with the results of infrared spectroscopy of apatite treated by the appropriate agents.
{"title":"Applicability of the Suspension Effect in Estimation of Influence Exerted by Ionic Composition of Flotation Pulp on Apatite Surface","authors":"A. V. Artem’ev, G. V. Mitrofanova","doi":"10.1134/s1062739123050149","DOIUrl":"https://doi.org/10.1134/s1062739123050149","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>By means of determining the suspension effect, the authors studied the change in the surface properties of apatite under the action of reagents and ions present in flotation pulp during processing of apatite-bearing ore. It is shown that the ratio of acid–base centers of apatite surface change in interaction with ions HCO<span>(_3^-)</span>, CO<span>(_3^{2-})</span>, HPO<span>(_2^{2-})</span>, cations Ca<span>(^{2 + })</span> and oleate ions in distilled water and in water after deionization to remove carbon dioxide. The change in apatite surface properties in alkaline water shows up as quantitative superiority of base centers. Such ionization of mineral surface favors adsorption of cations, for example, Ca<span>(^{2 + })</span>, and sets background for more efficient interaction between anion-type agents. The data obtained from the studies of the suspension effect, correlate with the results of infrared spectroscopy of apatite treated by the appropriate agents.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1134/s1062739123050071
A. V. Azarov, S. V. Serdyukov
Abstract
The article describes the numerical studies on propagation of hydraulic fracture in the nonuniform-stress elastic environment around a cylindrical cavity. The modeling used the extended method of finite elements. The scope of the modeling embraced different variants of the principal stress orientation relative to the cavity and a disk-shaped initiation fracture. The influence of the stress ratio and stress level on the fracture path is described. The main types of the created fractures are shown. The conditions when the created fracture reaches the cavity surface or propagates along it are analyzed. The features of the fracture propagation and opening pressure are described for the fractures of various shapes depending on the volume of the injection fluid.
{"title":"Modeling Hydraulic Fracturing near Circular Underground Opening in Triaxial Compression","authors":"A. V. Azarov, S. V. Serdyukov","doi":"10.1134/s1062739123050071","DOIUrl":"https://doi.org/10.1134/s1062739123050071","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article describes the numerical studies on propagation of hydraulic fracture in the nonuniform-stress elastic environment around a cylindrical cavity. The modeling used the extended method of finite elements. The scope of the modeling embraced different variants of the principal stress orientation relative to the cavity and a disk-shaped initiation fracture. The influence of the stress ratio and stress level on the fracture path is described. The main types of the created fractures are shown. The conditions when the created fracture reaches the cavity surface or propagates along it are analyzed. The features of the fracture propagation and opening pressure are described for the fractures of various shapes depending on the volume of the injection fluid.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139968642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1134/s1062739123060042
Abstract
The mathematical modeling of creep and long-term strength of rocks uses the non-associated flow rule. The authors propose a unified approach to the plasticity and creep processes. The theoretical calculations are compared with the testing data of different materials. In creep deformation in rocks, the applied problems on limit state of rock mass in plain strain are considered: pressure applied by a solid die block with flat bottom on rock mass limited by a horizontal plane and occupying the bottom part of a half-space; instability of pit wall or natural slope under different loads. These problems evaluate stresses in the limit state zones and the times-to-failure in rocks mass with regard to internal friction.
{"title":"Determining Time-to-Failure in Rocks Using Long-Term Strength Criterion","authors":"","doi":"10.1134/s1062739123060042","DOIUrl":"https://doi.org/10.1134/s1062739123060042","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The mathematical modeling of creep and long-term strength of rocks uses the non-associated flow rule. The authors propose a unified approach to the plasticity and creep processes. The theoretical calculations are compared with the testing data of different materials. In creep deformation in rocks, the applied problems on limit state of rock mass in plain strain are considered: pressure applied by a solid die block with flat bottom on rock mass limited by a horizontal plane and occupying the bottom part of a half-space; instability of pit wall or natural slope under different loads. These problems evaluate stresses in the limit state zones and the times-to-failure in rocks mass with regard to internal friction.</p> </span>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1134/s1062739123060169
Abstract
The mixed explosive-and-reagent effect exerted on a cemented mineral mass, which simulated an ore body, by explosive charges arranged in reagent solutions was investigated. Pretreatment of the model material by explosive injection of different reagent systems leads to pre-oxidation of copper contained in the material, which stimulates its subsequent leaching. The maximal increment in copper recovery in pregnant solution reached 83% relative to the check value. For the pre-oxidation of copper contained in the model material, the mixed explosive-and-reagent treatment used: electrically activated solution sodium bicarbonate and peroxide, mixture of sodium hydroxide and peroxide, sodium hypochlorite and distilled water. The complexing agent in copper leaching was agent Jin Chan in standard and activated states. It is found that activation of solutions using electrochemically treated sodium bicarbonate before adding the complexing agent enables higher effective recovery of copper from model materials after mixed explosive-and-reagent injection preparation.
摘要 研究了在试剂溶液中排列的炸药对模拟矿体的胶结矿块产生的炸药和试剂混合效应。通过注入不同试剂系统的炸药对模型材料进行预处理，导致材料中所含铜的预氧化，从而促进其随后的浸出。与检查值相比，孕育溶液中铜回收率的最大增幅达到 83%。为了对模型材料中的铜进行预氧化，使用了混合炸药和试剂处理方法：电活化碳酸氢钠和过氧化物溶液、氢氧化钠和过氧化物混合物、次氯酸钠和蒸馏水。铜浸出中的络合剂是标准状态和活化状态下的络合剂 Jin Chan。研究发现，在加入络合剂之前，使用经电化学处理的碳酸氢钠对溶液进行活化，可以在混合炸药和试剂注入制备后更有效地从模型材料中回收铜。
{"title":"Copper Leaching Using Mixed Explosive-and-Reagent Pretreatment of Ore Body","authors":"","doi":"10.1134/s1062739123060169","DOIUrl":"https://doi.org/10.1134/s1062739123060169","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The mixed explosive-and-reagent effect exerted on a cemented mineral mass, which simulated an ore body, by explosive charges arranged in reagent solutions was investigated. Pretreatment of the model material by explosive injection of different reagent systems leads to pre-oxidation of copper contained in the material, which stimulates its subsequent leaching. The maximal increment in copper recovery in pregnant solution reached 83% relative to the check value. For the pre-oxidation of copper contained in the model material, the mixed explosive-and-reagent treatment used: electrically activated solution sodium bicarbonate and peroxide, mixture of sodium hydroxide and peroxide, sodium hypochlorite and distilled water. The complexing agent in copper leaching was agent Jin Chan in standard and activated states. It is found that activation of solutions using electrochemically treated sodium bicarbonate before adding the complexing agent enables higher effective recovery of copper from model materials after mixed explosive-and-reagent injection preparation.</p> </span>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1134/s1062739123060030
Abstract
The article addresses the problem on thermal stresses and stress–strain behavior of rock mass during deep-level mining. The author proposes an approach to determining the stationary field of temperatures in the zone of mining with cemented paste backfill with single formation of stiffness matrix in the calculation. It is found that inclusion of the temperature change depthward rock mass in the analysis results in the increase in the initial horizontal stresses while the initial vertical stresses remain unaltered. The calculation method of stress redistribution in the course of mining with backfill, with the same stiffness matrix used at all calculation stages, is modified for taking into account the thermal stresses. The calculation of the thermal stress state of surrounding rocks and backfill is carried out for a case of mining with backfill in a gently dipping ore body.
{"title":"Thermal Stress State in the Vicinity of Underground Roadways","authors":"","doi":"10.1134/s1062739123060030","DOIUrl":"https://doi.org/10.1134/s1062739123060030","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The article addresses the problem on thermal stresses and stress–strain behavior of rock mass during deep-level mining. The author proposes an approach to determining the stationary field of temperatures in the zone of mining with cemented paste backfill with single formation of stiffness matrix in the calculation. It is found that inclusion of the temperature change depthward rock mass in the analysis results in the increase in the initial horizontal stresses while the initial vertical stresses remain unaltered. The calculation method of stress redistribution in the course of mining with backfill, with the same stiffness matrix used at all calculation stages, is modified for taking into account the thermal stresses. The calculation of the thermal stress state of surrounding rocks and backfill is carried out for a case of mining with backfill in a gently dipping ore body.</p> </span>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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