Pub Date : 2024-07-02DOI: 10.1134/s1062739124010162
N. F. Usmanova, E. A. Burdakova, I. I. Baksheeva, A. A. Plotnikova, V. N. Knyazev
Abstract
The article describes the studies on the material constitution of two lead–zinc ore samples from the Gorevka deposit. The samples are difficult ore because of fine dissemination of galena and its complex intergrowth with sphalerite; feature partial replacement of lead sulfide by anglesite and cerussite; contain colloform galena. The initial ore samples underwent the X-ray phase, chemical and grain-size analyses, with sizing of target elements. The tests of selective flotation of the samples, with variation of size grade in the lead circuit, in different reagent regimes and with the subsequent electron microscopy of the products proved the processing difficulty of the test ore.
摘要 本文介绍了对戈列夫卡矿床两块铅锌矿石样本物质构成的研究。由于方铅矿的细微散布及其与闪锌矿的复杂互生，这两个矿石样本是难找的矿石；其特点是硫化铅部分被角闪石和铈闪锌矿取代；含有柱状方铅矿。对最初的矿石样本进行了 X 射线相位、化学和粒度分析，并对目标元素进行了测定。根据铅回路中粒度品位的变化，在不同的试剂制度下对样品进行了选择性浮选试验，随后对产品进行了电子显微镜检查，证明了试验矿石的加工难度。
{"title":"Mineralogical Features Associated with Material Constitution and Process Properties of Difficult Lead–Zinc Ore","authors":"N. F. Usmanova, E. A. Burdakova, I. I. Baksheeva, A. A. Plotnikova, V. N. Knyazev","doi":"10.1134/s1062739124010162","DOIUrl":"https://doi.org/10.1134/s1062739124010162","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article describes the studies on the material constitution of two lead–zinc ore samples from the Gorevka deposit. The samples are difficult ore because of fine dissemination of galena and its complex intergrowth with sphalerite; feature partial replacement of lead sulfide by anglesite and cerussite; contain colloform galena. The initial ore samples underwent the X-ray phase, chemical and grain-size analyses, with sizing of target elements. The tests of selective flotation of the samples, with variation of size grade in the lead circuit, in different reagent regimes and with the subsequent electron microscopy of the products proved the processing difficulty of the test ore.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513127","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 : 2024-07-02DOI: 10.1134/s1062739124010150
S. A. Kondrat’ev, N. P. Moshkin
Abstract
The authors discuss dynamics of gas bubble and mineral particle in low-viscous fluid. The particle–bubble interaction model represents a system of associated differential algebraic equations. Dynamics of the disturbed system is described using the Lagrangian method. The model takes into account oscillations of bubble surface and attached solid cylindrical particle in the infinitive volume of perfect incompressible liquid. The capillary force retaining the particle on the bubble is governed by the meniscus shape which conditions the wetting angle. The Legendre series expansion is used to represent small axially symmetrical oscillations of the particle–bubble system. The potential and kinetic energies of the system are expressed in terms of the coefficient of this series. The resultant eddy-free velocity field allows including the viscosity effect with regard to the local rates of energy dissipation.
{"title":"The Particle–Bubble Behavior in Flotation in Low-Viscous Liquid","authors":"S. A. Kondrat’ev, N. P. Moshkin","doi":"10.1134/s1062739124010150","DOIUrl":"https://doi.org/10.1134/s1062739124010150","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The authors discuss dynamics of gas bubble and mineral particle in low-viscous fluid. The particle–bubble interaction model represents a system of associated differential algebraic equations. Dynamics of the disturbed system is described using the Lagrangian method. The model takes into account oscillations of bubble surface and attached solid cylindrical particle in the infinitive volume of perfect incompressible liquid. The capillary force retaining the particle on the bubble is governed by the meniscus shape which conditions the wetting angle. The Legendre series expansion is used to represent small axially symmetrical oscillations of the particle–bubble system. The potential and kinetic energies of the system are expressed in terms of the coefficient of this series. The resultant eddy-free velocity field allows including the viscosity effect with regard to the local rates of energy dissipation.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513132","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 : 2024-07-02DOI: 10.1134/s1062739124010022
S. V. Suknev
Abstract
The spotlight of the analysis is on the elastic properties of dolomite and limestone host rocks of diamonds at the Botuoba Pipe in the conditions of partial saturation. Pre-saturated rock samples were subjected to three testing cycles during natural drying in room conditions. The change patterns in the elastic modulus of the test rock materials are determined subject to their water contents in different regimes of water saturation. The authors arrive to the conclusion that the prevailing concept of water effects on the mechanical properties of rocks is only valid in the steady-state conditions and is invalid in the unsteady-state conditions when moisture is nonuniformly distributed in the pore space of rocks.
{"title":"Effects of Regimes of Water Saturation on Static Elastic Properties of Carbonate Rocks","authors":"S. V. Suknev","doi":"10.1134/s1062739124010022","DOIUrl":"https://doi.org/10.1134/s1062739124010022","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The spotlight of the analysis is on the elastic properties of dolomite and limestone host rocks of diamonds at the Botuoba Pipe in the conditions of partial saturation. Pre-saturated rock samples were subjected to three testing cycles during natural drying in room conditions. The change patterns in the elastic modulus of the test rock materials are determined subject to their water contents in different regimes of water saturation. The authors arrive to the conclusion that the prevailing concept of water effects on the mechanical properties of rocks is only valid in the steady-state conditions and is invalid in the unsteady-state conditions when moisture is nonuniformly distributed in the pore space of rocks.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513123","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 : 2024-07-02DOI: 10.1134/s1062739124010046
V. I. Vostrikov, V. F. Zakharikov
Abstract
The propagation of elastic vibrations in rock samples in compression and under impacts to failure is investigated experimentally. Under impacts, a signal of acceleration was recorded in the samples, and the spectral density was calculated to determine velocities of elastic vibrations. It is found that under increasing load up to a pre-failure value, the P- and S-wave velocities grow, and the S-wave velocity increases by more than 50%. The acoustic Q-factor rises by 70%. The energy of the microseismic emission under pre-failure loads is two times higher than under low loads, and the high-amplitude spectral components generated under pre-failure loading are reflective of large discontinuities being formed.
摘要 通过实验研究了岩石样本在压缩和冲击破坏情况下的弹性振动传播。在冲击作用下，样品中记录了加速度信号，并通过计算频谱密度确定了弹性振动的速度。结果发现，当载荷增加到失效前的值时，P 波和 S 波速度增加，S 波速度增加 50%以上。声 Q 因子上升了 70%。失效前荷载下的微震发射能量是低荷载下的两倍，失效前荷载下产生的高振幅频谱成分反映了正在形成的大的不连续面。
{"title":"Propagation of Elastic Vibrations and Generation of Microseismic Emission in Loaded Rocks Samples under Dynamic Impact","authors":"V. I. Vostrikov, V. F. Zakharikov","doi":"10.1134/s1062739124010046","DOIUrl":"https://doi.org/10.1134/s1062739124010046","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The propagation of elastic vibrations in rock samples in compression and under impacts to failure is investigated experimentally. Under impacts, a signal of acceleration was recorded in the samples, and the spectral density was calculated to determine velocities of elastic vibrations. It is found that under increasing load up to a pre-failure value, the P- and S-wave velocities grow, and the S-wave velocity increases by more than 50%. The acoustic Q-factor rises by 70%. The energy of the microseismic emission under pre-failure loads is two times higher than under low loads, and the high-amplitude spectral components generated under pre-failure loading are reflective of large discontinuities being formed.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513118","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 : 2024-07-02DOI: 10.1134/s1062739124010071
V. V. Tarasov, V. N. Aptukov, O. V. Ivanov, P. V. Nikolaev
Abstract
The mine shafts in the salt (unwatered) rock mass at the Upper Kama deposit are mostly lined with cast-in-place concrete and reinforced concrete, which should ensure the required load-bearing capacity and water impermeability in host rocks in creep. The long-term observations of the shaft lining in operation revealed some typical patterns of failure induced by the rheological properties of salt rock mass under the action of rock pressure. The technical evaluation of the lining and reinforcement of mine shafts is an integrated checkup procedure including measurements of fractures and areas of corrosive zones/rock falls; updating of actual geometrics of lining from laser measurements; determination of residual strength of lining; mathematical modeling; estimation of integral reliability index of lining. The authors propose a procedure to categorize technical conditions of concrete lining in mine shafts in operation in salt-bearing rock mass in creep. The application of the procedure is described, and the conclusions on the package of repair activities are drawn.
{"title":"Technical Evaluation of Concrete Lining in Mine Shafts at the Upper Kama Salt Deposit","authors":"V. V. Tarasov, V. N. Aptukov, O. V. Ivanov, P. V. Nikolaev","doi":"10.1134/s1062739124010071","DOIUrl":"https://doi.org/10.1134/s1062739124010071","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The mine shafts in the salt (unwatered) rock mass at the Upper Kama deposit are mostly lined with cast-in-place concrete and reinforced concrete, which should ensure the required load-bearing capacity and water impermeability in host rocks in creep. The long-term observations of the shaft lining in operation revealed some typical patterns of failure induced by the rheological properties of salt rock mass under the action of rock pressure. The technical evaluation of the lining and reinforcement of mine shafts is an integrated checkup procedure including measurements of fractures and areas of corrosive zones/rock falls; updating of actual geometrics of lining from laser measurements; determination of residual strength of lining; mathematical modeling; estimation of integral reliability index of lining. The authors propose a procedure to categorize technical conditions of concrete lining in mine shafts in operation in salt-bearing rock mass in creep. The application of the procedure is described, and the conclusions on the package of repair activities are drawn.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513120","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 : 2024-07-02DOI: 10.1134/s1062739124010125
Tao Xu, Yi Fu
Abstract
The ordinary Portland cement (OPC) as usual binder is widely used for the backfilling in the Zijinshan Copper mine of Fujian province, whereas it leads to high cost of cemented paste backfill (CPB) every year. The main objectives of this study were to investigate the effect of low-calcium fly ash (LCFA) substituting for OPC on the compressive strength of CPB samples, through treating LCFA with mechanical and chemical action method to improve its pozzolanic activity. The experiment results show that the compressive strength of CPB samples is not increased when the non-treated LCFA is added into substitute for partial OPC. However, the compressive strength is obviously improved by the replacement of partial OPC with treated LCFA. When the substitution ratio of treated LCFA is 29.8%, the 28-day compressive strength of CPB samples with binder/tailing ratio of 1:6 achieves 3.9 MPa, and is 1.95 times higher than that of CPB samples with OPC as sole binder under the same condition. The economic analysis result exhibits a partial replacement (29.8%) of OPC with treated LCFA can save 28.7% of cemented backfill cost, indicating great economic benefit for underground backfilling mining.
{"title":"Substitution of Low-Calcium Fly Ash for Partial Portland Cement in Underground Backfilling Mining","authors":"Tao Xu, Yi Fu","doi":"10.1134/s1062739124010125","DOIUrl":"https://doi.org/10.1134/s1062739124010125","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The ordinary Portland cement (OPC) as usual binder is widely used for the backfilling in the Zijinshan Copper mine of Fujian province, whereas it leads to high cost of cemented paste backfill (CPB) every year. The main objectives of this study were to investigate the effect of low-calcium fly ash (LCFA) substituting for OPC on the compressive strength of CPB samples, through treating LCFA with mechanical and chemical action method to improve its pozzolanic activity. The experiment results show that the compressive strength of CPB samples is not increased when the non-treated LCFA is added into substitute for partial OPC. However, the compressive strength is obviously improved by the replacement of partial OPC with treated LCFA. When the substitution ratio of treated LCFA is 29.8%, the 28-day compressive strength of CPB samples with binder/tailing ratio of 1:6 achieves 3.9 MPa, and is 1.95 times higher than that of CPB samples with OPC as sole binder under the same condition. The economic analysis result exhibits a partial replacement (29.8%) of OPC with treated LCFA can save 28.7% of cemented backfill cost, indicating great economic benefit for underground backfilling mining.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513124","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 : 2024-07-02DOI: 10.1134/s1062739124010137
A. A. Ordin, A. M. Nikol’sky, M. A. Grishchenko
Abstract
The optimization problem is formulated for the cross-section outline of bulkload on a belt conveyor and for the kinematic parameters of the latter. The analytical solution on the optimum angle of side rollers and cross-section outline of bulkload on the belt is presented. The influence of the friction angle on the optimum cross-section outline of bulkload on the belt is illustrated. The optimization of velocity and acceleration of belt conveyor in the start period is described. The influence of the angle of the side rollers on the rolling friction is determined.
{"title":"Optimizing Cross-Section Outline of Bulkload on Belt Conveyor","authors":"A. A. Ordin, A. M. Nikol’sky, M. A. Grishchenko","doi":"10.1134/s1062739124010137","DOIUrl":"https://doi.org/10.1134/s1062739124010137","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The optimization problem is formulated for the cross-section outline of bulkload on a belt conveyor and for the kinematic parameters of the latter. The analytical solution on the optimum angle of side rollers and cross-section outline of bulkload on the belt is presented. The influence of the friction angle on the optimum cross-section outline of bulkload on the belt is illustrated. The optimization of velocity and acceleration of belt conveyor in the start period is described. The influence of the angle of the side rollers on the rolling friction is determined.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513095","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 : 2024-07-02DOI: 10.1134/s1062739124010113
M. Amin, S. Sudibyo, D. C. Birawidha, K. Isnugroho, S. Syafriadi, S. Septiana, B. Dinda Erlangga, D. Susanti, F. Bahfie
Abstract
The effect of variations in the composition of kaolin and basalt on the geopolymer characteristics was carried out. The drying time was 4 h for cubic samples at 40, 50 and 60 °C and 9 h for cylindrical samples at 70 and 90 °C. The best geopolymer was (K)4 cylinder at 90 °C, which had a compressive strength of 8.075 MPa. The density of (K)2 cube geopolymer ranged as 26–1.94 g/cm3 at 60 °C. Silica–alumina compounds dominated the constituent compounds of geopolymer concrete, and the phases formed were quartz, anorthite and muscovite.
摘要 研究了高岭土和玄武岩成分变化对土工聚合物特性的影响。立方体样品在 40、50 和 60 °C 下的干燥时间为 4 小时，圆柱形样品在 70 和 90 °C 下的干燥时间为 9 小时。最佳的土工聚合物是 90 ℃ 下的（K）4 圆柱形样品，其抗压强度为 8.075 兆帕。(K)2 立方体土工聚合物的密度在 60 °C 时为 26-1.94 克/立方厘米。硅铝化合物在土工聚合物混凝土的组成化合物中占主导地位，形成的相为石英、阳起石和麝香石。
{"title":"Effect of Kaolin and Basalt Composition on Geopolymer Characteristics","authors":"M. Amin, S. Sudibyo, D. C. Birawidha, K. Isnugroho, S. Syafriadi, S. Septiana, B. Dinda Erlangga, D. Susanti, F. Bahfie","doi":"10.1134/s1062739124010113","DOIUrl":"https://doi.org/10.1134/s1062739124010113","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of variations in the composition of kaolin and basalt on the geopolymer characteristics was carried out. The drying time was 4 h for cubic samples at 40, 50 and 60 °C and 9 h for cylindrical samples at 70 and 90 °C. The best geopolymer was <span>(K)</span>4 cylinder at 90 °C, which had a compressive strength of 8.075 MPa. The density of <span>(K)</span>2 cube geopolymer ranged as 26–1.94 g/cm<sup>3</sup> at 60 °C. Silica–alumina compounds dominated the constituent compounds of geopolymer concrete, and the phases formed were quartz, anorthite and muscovite.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513125","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 : 2024-07-02DOI: 10.1134/s1062739124010174
V. E. Burov, V. Z. Poilov, I. S. Potapov, K. G. Kuz’minykh
Abstract
The authors investigate the structural and colloid properties of a collector represented by amine hydrochloride treated by ultrasound and included in sylvinite flotation. Using the viscosity–temperature dependences, the Gibbs free energy is calculated for amine hydrochloride with and without treatment by ultrasound. It is found that ultrasound-treated amine added in salt-fat solutions are more stable to coagulation. From the synchronous thermal analysis, IR spectroscopy and X-ray phase analysis, it is inferred that ultrasonic treatment of amine hydrochloride slightly increases crystallinity of amine. The research findings improve understanding of the ultrasound effect on the change in the structural and colloid properties of the collector, which are important to optimizing output, sustainability and efficiency of potassium chloride production by flotation.
摘要 作者研究了以盐酸胺为代表的捕收剂经超声波处理后在锡石浮选中的结构和胶体特性。利用粘度-温度相关性，计算了经超声处理和未经超声处理的盐酸胺的吉布斯自由能。结果发现，添加到盐脂溶液中的经过超声处理的胺对凝结更稳定。通过同步热分析、红外光谱和 X 射线相分析，可以推断出经超声波处理的胺盐酸盐会略微增加胺的结晶度。这些研究成果加深了人们对超声波影响捕收剂结构和胶体性质变化的理解，这对优化浮选法生产氯化钾的产量、可持续性和效率非常重要。
{"title":"Effect of Ultrasonic Treatment on Structural Properties and Colloidal State of Sylvinite Flotation Collector","authors":"V. E. Burov, V. Z. Poilov, I. S. Potapov, K. G. Kuz’minykh","doi":"10.1134/s1062739124010174","DOIUrl":"https://doi.org/10.1134/s1062739124010174","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The authors investigate the structural and colloid properties of a collector represented by amine hydrochloride treated by ultrasound and included in sylvinite flotation. Using the viscosity–temperature dependences, the Gibbs free energy is calculated for amine hydrochloride with and without treatment by ultrasound. It is found that ultrasound-treated amine added in salt-fat solutions are more stable to coagulation. From the synchronous thermal analysis, IR spectroscopy and X-ray phase analysis, it is inferred that ultrasonic treatment of amine hydrochloride slightly increases crystallinity of amine. The research findings improve understanding of the ultrasound effect on the change in the structural and colloid properties of the collector, which are important to optimizing output, sustainability and efficiency of potassium chloride production by flotation.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513093","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 : 2024-07-02DOI: 10.1134/s1062739124010083
V. A. Koronatov
Abstract
The article describes two single-mass models of a drill string and different methods of bottom-hole treatment: percussion and rotary percussion. The loads created by the piston are transferred to rocks via a progressively advancing bit in the first model and via a rotatable bit in the second model. The drag force applied to the bit is found from the nonlinear dependence on the penetration rate and kinematic parameters which govern the force impact on the rock and its loss of strength: initial blow velocity and rotational speed modulus of the bit. The optimal initial blow velocities are found at the preset blow frequency; they ensure elimination of short-term stick slips in penetration of the bit. For the mentioned cases of penetration, the processes of percussion and rotary percussion drilling in strong rocks are provided with the strict mathematical description. The numerical modeling results are presented.
{"title":"Modeling Percussion and Rotary Percussion Drilling in Strong Rocks","authors":"V. A. Koronatov","doi":"10.1134/s1062739124010083","DOIUrl":"https://doi.org/10.1134/s1062739124010083","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article describes two single-mass models of a drill string and different methods of bottom-hole treatment: percussion and rotary percussion. The loads created by the piston are transferred to rocks via a progressively advancing bit in the first model and via a rotatable bit in the second model. The drag force applied to the bit is found from the nonlinear dependence on the penetration rate and kinematic parameters which govern the force impact on the rock and its loss of strength: initial blow velocity and rotational speed modulus of the bit. The optimal initial blow velocities are found at the preset blow frequency; they ensure elimination of short-term stick slips in penetration of the bit. For the mentioned cases of penetration, the processes of percussion and rotary percussion drilling in strong rocks are provided with the strict mathematical description. The numerical modeling results are presented.</p>","PeriodicalId":16358,"journal":{"name":"Journal of Mining Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513121","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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