Journal of Mining Science最新文献

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Dependence of Drillability Parameters on Engineering Properties of Selected Rocks from Pakistan 巴基斯坦部分岩石的可钻性参数与工程特性的关系

IF 0.8 4区工程技术 Q4 MINING & MINERAL PROCESSING

Journal of Mining Science

Pub Date : 2024-07-02 DOI: 10.1134/s1062739124010101

M. Z. Abu Bakar, Y. Majeed

Abstract

In this study, the rock drillability tests, as well as a comprehensive set of physical and mechanical rock property tests were performed on rock units selected from various localities of Pakistan. Petrography of included rock samples was also conducted for the computation of geotechnical wear indices including Schimazek’s F-value, rock abrasivity index and the Vickers hardness number for rocks. Initially univariate regression analysis was performed to check the dependence of drillability parameters on physico-mechanical properties and rock wear indices. Significant correlations of drillability parameters with uniaxial compressive strength were found. Similarly, Sievers’ J-value and drilling rate index showed considerable dependence on Schimazek’s F-value. In the next step, multivariate linear regression models of Sievers’ J-value, brittleness value and drilling rate index, based on physical, mechanical and petrographical rock parameters were developed. Finally, the predictability of proposed multiple regression models was validated by employing the statistical performance indices

摘要在这项研究中，对从巴基斯坦各地选取的岩石单位进行了岩石可钻性测试以及一整套岩石物理和机械性能测试。此外，还对所含岩石样本进行了岩相学研究，以计算岩土磨损指数，包括 Schimazek 的 F 值、岩石磨蚀指数和岩石的维氏硬度数。首先进行了单变量回归分析，以检验可钻性参数与物理机械特性和岩石磨损指数之间的关系。结果发现，可钻性参数与单轴抗压强度存在显著的相关性。同样，Sievers'J 值和钻速指数也与 Schimazek's F 值有相当大的相关性。下一步，根据岩石的物理、机械和岩相参数，建立了西弗斯 J 值、脆性值和钻速指数的多元线性回归模型。最后，利用统计性能指标验证了所提出的多元回归模型的可预测性。

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引用次数: 0

Recovery of Rare Earth Element-Bearing Placer Minerals 回收含稀土元素的矿床矿物

IF 0.8 4区工程技术 Q4 MINING & MINERAL PROCESSING

Journal of Mining Science

Pub Date : 2024-07-02 DOI: 10.1134/s1062739124010186

R. B. Rao, B. Mishra, D. Singh

Abstract

This article discusses the process flow chart for the recovery of the rare earthbearing minerals monazite and zircon. The results of this study show that 97.9% monazite with 0.006% yield and 61.2% recovery can be achieved from a feed sample containing 0.0096% monazite by using spiral, electrostatic and magnetic separators followed by flotation. When zircon is subjected to study the process mineralogy, it is observed that a zircon grade in the feed sample containing 0.028% zircon can be upgraded to a zircon grade of 98.7% at the yield of 0.006% and the recovery of 21.5%.

摘要本文讨论了含稀土矿物独居石和锆石的回收工艺流程图。研究结果表明，从含 0.0096% 独居石的给矿样品中，使用螺旋、静电和磁性分离器，然后进行浮选，可获得 97.9% 的独居石，产率为 0.006%，回收率为 61.2%。在对锆石进行工艺矿物学研究时，发现含 0.028% 锆石的给矿样品中的锆石品位可提升至 98.7%，产率为 0.006%，回收率为 21.5%。

引用次数: 0

Prediction of Rock Fragmentation in Bench Blasting Operations Based on Multi Parameters—A Case Study 基于多参数的台阶爆破作业岩石破碎预测--案例研究

IF 0.8 4区工程技术 Q4 MINING & MINERAL PROCESSING

Journal of Mining Science

Pub Date : 2024-07-02 DOI: 10.1134/s1062739124010095

Y. Majeed, M. Z. Emad, M. Z. Abu Bakar, Ayatullah

Abstract

This study discusses the dependence of blast fragmentation size on field parameters and rock properties. For this purpose six limestone quarries of productive cement factories of Pakistan were selected including a total of 19 working bench faces. The field work included determination of rock fragmentation size, field penetration rate, rock mass parameters and blast design parameters. The geo-mechanical laboratory testing program includes LCPC rock abrasivity tests, NTNU/SINTEF drillability tests along with determination of laboratory drilling rate index and physico-mechanical rock property tests. The technique of least square regression was adopted to explain the obtained dependence. Finally, three multiple regression models were proposed for the estimation of rock fragmentation size from the test field and laboratory scale parameters. The quality of developed multivariable models was statistically validated through statistical performance indicators.

摘要本研究讨论了爆破破碎尺寸与现场参数和岩石特性的关系。为此，研究人员选择了巴基斯坦六家生产水泥厂的石灰石采石场，共包括 19 个工作面。现场工作包括确定岩石破碎尺寸、现场穿透率、岩石质量参数和爆破设计参数。地质机械实验室测试项目包括 LCPC 岩石磨蚀性测试、NTNU/SINTEF 可钻性测试以及实验室钻进率指数测定和岩石物理机械性能测试。采用最小平方回归技术来解释所获得的依赖关系。最后，提出了三个多元回归模型，用于根据试验场和实验室参数估算岩石破碎粒度。通过统计性能指标对所建立的多元模型的质量进行了统计验证。

引用次数: 0

Physical Modeling of Hydraulic Fracturing in Cross Boreholes in Nonuniform Stress Field 非均匀应力场跨孔水力压裂物理模型

IF 0.8 4区工程技术 Q4 MINING & MINERAL PROCESSING

Journal of Mining Science

Pub Date : 2024-07-02 DOI: 10.1134/s106273912401006x

A. V. Patutin, L. A. Rybalkin, A. N. Drobchik, S. V. Serdyukov

Abstract

The article describes the lab-scale tests of hydraulic fracturing in the nonuniform stress field. Fractures were created in a system of two and three cross holes made in artificial cubic blocks with the edges 420 mm long. The stress raiser generated at the intersection of the holes facilitates fracturing in the neighborhood. In the tests the maximum compression was applied to a sample in perpendicular to the plane containing the axes of the holes. It is found that in such stress field, the system of three holes stabilizes a fracture in the mentioned plane better than the system of two holes.

摘要本文介绍了实验室规模的非均匀应力场水力压裂试验。在人造立方体块（边缘长 420 毫米）上制作的两孔和三孔交叉系统中产生了裂缝。孔洞交叉处产生的应力升高促进了附近区域的压裂。在试验中，对垂直于包含孔轴线的平面的试样施加了最大压缩。结果发现，在这种应力场中，三孔系统比两孔系统更能稳定上述平面上的断裂。

引用次数: 0

The Application of Shortwave Band GPR in Investigation of Surrounding Rock-and-Lining Interface 短波波段 GPR 在围岩与衬砌界面勘测中的应用

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s1062739123060029

V. N. Oparin, E. V. Denisova, A. P. Khmelinin, K. O. Sokolov, A. I. Konurin

Abstract

The Ground Penetrating Radar method is used to study a three-layered model of the surrounding rock–void–lining interface with regard to variation in the void thickness and in the electromagnetic properties of the void filler. The numerical modeling uses the method of finite differences in the time domain. The numerical modeling data are compared with the results of the physical simulation implemented using SIR-3000 GPR with the Model 52600 antenna having the working frequency of 2.6 GHz (S-band). It is found that the size of the void behind concrete lining and the electromagnetic properties of a material filling the void have influence on the accuracy of ranging to the lower boundary of the void and to the discontinuity in the form of a steel bolt located immediately behind the void in surrounding rock mass.

摘要利用地面穿透雷达方法研究了围岩-空隙-衬砌界面的三层模型，以及空隙厚度和空隙填充物电磁特性的变化。数值建模采用时域有限差分法。数值建模数据与使用 SIR-3000 GPR 和工作频率为 2.6 GHz（S 波段）的 52600 型天线进行的物理模拟结果进行了比较。结果发现，混凝土衬里后空隙的大小和填充空隙的材料的电磁特性会影响到对空隙下边界和周围岩体空隙后紧靠钢螺栓形式的不连续性的测距精度。

引用次数: 0

Numerical Modeling of Stress–Strain Behavior of Rock Mass in the Course of Mining of Lower Strata in a Series 岩体在开采系列下部地层过程中的应力-应变行为数值建模

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s1062739123060066

S. V. Rib, O. A. Petrova, A. M. Nikitina, V. A. Boloshin, V. N. Fryanov

Abstract

The features of mining of a coal series are described. The stress–strain behavior of rock mass during mining of the lower strata in the series is assessed with regard to the influence of coal pillars and upper level roadways. Different variants of location of a temporary roadway on the lower stratum in a series protected by a pillar are discussed. The implemented prediction of the stress–strain behavior of rock mass is adapted to the conditions of mines in the south of Kuzbass. This prediction is used to select the geomechanically safest variant of location of the temporary roadway.

摘要描述了煤系开采的特点。根据煤柱和上层巷道的影响，评估了该煤系下部地层开采过程中岩体的应力应变行为。讨论了在有煤柱保护的煤系下部地层上设置临时巷道的不同方案。根据库兹巴斯南部矿井的条件，对岩体的应力应变行为进行了预测。该预测用于选择地质力学上最安全的临时巷道位置。

引用次数: 0

Stimulation of Flotation Selectivity Using Physisorption Mechanism of Collectors 利用捕收剂的物理吸附机制激发浮选选择性

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s106273912306011x

S. A. Kondrat’ev, I. A. Konovalov, T. G. Gavrilova

Abstract

The main mechanisms of flotation activation by ions of metals are discussed and critically analyzed. It is shown that ions of metals can be both activators and depressants of flotation. Based on the mechanism of physisorption, it is revealed when metals act as activators and depressants. A method is proposed to stimulate selectivity of extraction of a target mineral in case of undesirable activation of flotation of associate components. The studies can be useful in selection of metal–activator, ratio of concentrations of activator and collector and pH of flotation system.

摘要讨论并认真分析了金属离子激活浮选的主要机制。研究表明，金属离子既可以是浮选的激活剂，也可以是抑制剂。根据物理吸附机理，揭示了金属作为激活剂和抑制剂的作用机理。提出了一种方法，可在伴生组分对浮选产生不良激活作用的情况下，提高目标矿物的提取选择性。这些研究有助于选择金属活化剂、活化剂和捕收剂的浓度比例以及浮选系统的 pH 值。

引用次数: 0

Time Series Forecasting of Indian Coal Mines Fatal Accidents 印度煤矿致命事故的时间序列预测

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s1062739123060200

Abinash Mohanty, Devidas S. Nimaje

Abstract

The present study analyzes the fatal accident occurrences of seventy years from 1951 to 2020 in Indian coal mines. The autoregressive integrated moving average (ARIMA) model, Brown’s double exponential smoothing method, Holt’s double exponential smoothing method, and neural network time series forecasting are used in this research to analyze fatal accidents and forecast future accident incidents. By analyzing various parameters of the applied models, the neural network model was found to be the most appropriate model for the collected data to forecast Indian coal mine accidents as it provides the least root mean squared error (RMSE) (17.62), and mean absolute error (MAE) (13.33) among all models. According to this study, the Neural Network model is the most suitable one to predict Indian coal mine fatality.

摘要本研究分析了印度煤矿从 1951 年到 2020 年七十年间发生的致命事故。本研究采用了自回归综合移动平均（ARIMA）模型、布朗双指数平滑法、霍尔特双指数平滑法和神经网络时间序列预测法对死亡事故进行分析，并对未来事故进行预测。通过分析所应用模型的各种参数，发现神经网络模型是最适合所收集数据的模型，可用于预测印度煤矿事故，因为它在所有模型中提供了最小的均方根误差（RMSE）（17.62）和平均绝对误差（MAE）（13.33）。根据这项研究，神经网络模型是最适合预测印度煤矿死亡事故的模型。

引用次数: 0

The Use of Flotation and High-Intensity Magnetic Separation to Improve Feldspar Concentrate Quality 利用浮选和高强度磁选提高长石精矿质量

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s1062739123060157

M. M. Ahmed, G. A. Ibrahim, A. M. E. Rizk, N. A. Mahmoud

Abstract

The flotation process and magnetic separation are the most common methods for feldspar beneficiation containing approximately 0.4% Fe₂O₃ and 0.04% TiO₂. A model MIH (13) 111-5 Induced Roll dry high-intensity magnetic separator was used in this investigation to produce high-quality feldspar concentrate, and investigate the effects of magnetic field strength and roll speed on reducing coloring minerals. The best results were obtained at a magnetic field intensity of 16600 Gauss and a roller speed of 24 rpm. A feldspar concentrate containing 0.16% Fe₂O₃, 0.01% TiO₂ and 10.31% alkali minerals (K₂O+Na₂O) was obtained with a mass recovery of approximately 69.24%. As a result, the products that met the white glaze and ceramic requirements were produced.

摘要浮选工艺和磁选是长石选矿最常用的方法，长石中含有约 0.4% 的 Fe2O3 和 0.04% 的 TiO2。本研究使用 MIH (13) 111-5 型诱导辊干式高强度磁选机生产优质长石精矿，并研究磁场强度和辊速对还原着色矿物的影响。在磁场强度为 16600 高斯、辊速为 24 转/分钟时，获得了最佳效果。获得的长石精矿含有 0.16% 的 Fe2O3、0.01% 的 TiO2 和 10.31% 的碱性矿物（K2O+Na2O），质量回收率约为 69.24%。因此，生产出了符合白釉和陶瓷要求的产品。

引用次数: 0

The Use of Geospatial Data in the Industrially Disturbed Land Evaluation 在工业扰动土地评估中使用地理空间数据

IF 0.8 4区工程技术 Q3 Earth and Planetary Sciences

Journal of Mining Science

Pub Date : 2024-03-12 DOI: 10.1134/s1062739123060182

N. S. Kosarev, A. A. Kolesnikov, A. V. Reznik, N. A. Nemova, D. S. Ozhogin

Abstract

The authors propose a sequence of acquisition and interpretation of geospatial data obtained using different methods and means during mineral mining toward the accuracy increase in evaluation of industrially disturbed land. This approach uses the concept of stage-wise transition from the areas of industrial facilities to their individual points. The integration of data of satellite surveys, ground-based laser scanning and unmanned aerial surveillance in the digital models of land areas is described. It is highlighted that the rational combination of different methods of geospatial data acquisition and interpretation produces a high-accurate geoinformation system of digital twins of various subsoil use facilities.

摘要作者提出了在矿产开采过程中使用不同方法和手段获取和解释地理空间数据的顺序，以提高受工业干扰土地评估的准确性。该方法采用了从工业设施区域到单个点的分阶段过渡概念。介绍了在土地区域数字模型中整合卫星测量、地面激光扫描和无人机监测数据的方法。重点指出，将不同的地理空间数据采集和解释方法合理结合，可产生一个高精度的地理信息系统，即各种底土利用设施的数字孪生模型。

引用次数: 0

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