| Numerical Simulation of Coal Floor Fault Activation Influenced by Mining |
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| 作者姓名： | WANG Lian-guo MIAO Xie-xing |
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| 作者单位： | School of Sciences, China University of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China |
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| 基金项目： | 国家自然科学基金;教育部科学技术研究项目 |
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| 摘 要： |
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| 关 键 词： | 煤层 数值模拟 工作面 水平压缩力 移位 |
| 收稿时间： | 2006-03-14 |
| 修稿时间： | 2006-04-28 |
Numerical Simulation of Coal Floor Fault Activation Influenced by Mining |
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| WANG Lian-guo MIAO Xie-xing.Numerical Simulation of Coal Floor Fault Activation Influenced by Mining[J].Journal of China University of Mining and Technology,2006,16(4):385-388. |
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| Authors: | WANG Lian-guo MIAO Xie-xing |
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| Affiliation: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, PR China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Shanghai 200092, PR China;1. Tarbiat Modares University, Civil and Environmental Engineering Department, Tehran, Iran;2. Newcastle University, School of Civil Engineering and GeoSciences, England, United Kingdom;1. Engineering Geology and Resource Geotechnics Group, Simon Fraser University, Burnaby, BC, Canada;2. Mining & Designing Branch, China Coal Research Institute, Beijing, China;1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;2. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, Liaoning 110819, China |
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| Abstract: | By means of the numerical simulation software ANSYS, the activation regularity of coal floor faults caused by mining is simulated. The results indicate that the variation in horizontal, vertical and shear stresses, as well as the horizontal and vertical displacements in the upper and the lower fault blocks at the workface are almost identical. Influenced by mining of the floor rock, there are stress releasing and stress rising areas at the upper part and at the footwall of the fault. The distribution of stress is influenced by the fault so that the stress isolines are staggered by the fault face and the stress is focused on the rock seam around the two ends of the fault. But the influence in fault activation on the upper or the lower fault blocks of the workface is markedly different. When the workface is on the footwall of the fault, there is a horizontal tension stress area on the upper part of the fault; when the workface is on the upper part of the fault, it has a horizontal compressive stress area on the lower fault block. When the workface is at the lower fault block, the maximum vertical displacement is 5 times larger then when the workface is on the upper fault block, which greatly increases the chance of a fatal inrush of water from the coal floor. |
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| Keywords: | mining fault activation simulation |
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