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A Model of Joint Rock–Proppant Deformation in Hydraulic Fracturing 水力压裂中岩石-支撑剂联合变形模型
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050022
D. S. Zhurkina, S. V. Lavrikov, A. F. Revuzhenko
{"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}
引用次数: 0
Phenomenological Model for Evaluation of Slope Stability for Overburden Rock Dumps 评估覆盖层岩石堆放场边坡稳定性的现象学模型
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050095
V. I. Kulikov, Z. Z. Sharafiev
{"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}
引用次数: 0
Experimental Research of Mudcake Formation on Low-Permeable Sandstone Samples 低渗透性砂岩样品泥饼形成的实验研究
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s106273912305006x
D. M. Evmenova, N. A. Golikov, I. N. El’tsov
{"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}
引用次数: 0
Intensification of Basic Processes in Separation of Difficult Diamond-Bearing Raw Materials 强化分离难选金刚石原料的基础工艺
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050125
V. A. Chanturia, G. P. Dvoichenkova, E. L. Chanturia, A. S. Timofeev
{"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}
引用次数: 0
Processibility of Fine-Grained Magnetite–Apatite Ore Mill Tailings at Kovdor Deposit 科夫多矿藏细粒磁铁矿-铂铁矿磨矿尾矿的可加工性
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050137
G. V. Mitrofanova, Yu. P. Pospelova, D. F. Sedinin
{"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}
引用次数: 0
Applicability of the Suspension Effect in Estimation of Influence Exerted by Ionic Composition of Flotation Pulp on Apatite Surface 悬浮效应在估计浮选矿浆离子成分对磷灰石表面影响时的适用性
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050149
A. V. Artem’ev, G. V. Mitrofanova
{"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}
引用次数: 0
Modeling Hydraulic Fracturing near Circular Underground Opening in Triaxial Compression 三轴压缩下圆形地下开口附近的水力压裂建模
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2024-02-26 DOI: 10.1134/s1062739123050071
A. V. Azarov, S. V. Serdyukov
{"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}
引用次数: 0
Determining Time-to-Failure in Rocks Using Long-Term Strength Criterion 利用长期强度标准确定岩石的破坏时间
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2023-12-01 DOI: 10.1134/s1062739123060042
{"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}
引用次数: 0
Copper Leaching Using Mixed Explosive-and-Reagent Pretreatment of Ore Body 采用爆炸和试剂混合预处理矿体的铜浸出工艺
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2023-12-01 DOI: 10.1134/s1062739123060169
{"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}
引用次数: 0
Thermal Stress State in the Vicinity of Underground Roadways 地下道路附近的热应力状态
IF 0.8 4区 工程技术
Journal of Mining Science Pub Date : 2023-12-01 DOI: 10.1134/s1062739123060030
{"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}
引用次数: 0
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