| 大同矿区“三硬”条件地表沉陷数值模拟 |
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| 引用本文： | 侯志鹰,王家臣.大同矿区“三硬”条件地表沉陷数值模拟[J].煤炭学报,2007,32(3):235-238. |
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| 作者姓名： | 侯志鹰 王家臣 |
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| 作者单位： | 1.中国矿业大学(北京) 资源与安全工程学院，北京，100083;
2.大同煤矿集团公司，山西 大同，037000 |
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| 摘 要： | 针对大同矿区“三硬”条件马脊梁矿2号402盘区刀柱开采引发的井下工作面顶板大面积突然垮落和地表整体塌陷，采用三维有限差分法FLAC3D软件进行采场力学行为模拟分析.从煤层的开挖到地表的塌陷，全面分析了开采历史过程的应力场、位移场和破坏场的分布与变化，以及采场内煤柱的稳定性.提出了采场内煤柱失稳破坏引起采场应力重新分布，出现煤柱群连续失稳破坏的多米诺效应，从而导致采空区顶板大面积突然垮落和地表整体塌陷.
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| 关 键 词： | &ldquo 三硬&rdquo 条件 地表塌陷 数值模拟 煤柱失稳 多米诺效应 |
| 文章编号： | 0253-9993(2007)03-0235-04 |
| 收稿时间： | 2006-06-29 |
| 修稿时间： | 2006年6月29日 |
Numerical simulation of surface subsidence on the conditions of “three-hard” in Datong mining area |
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| HOU Zhi-ying,WANG Jia-chen.Numerical simulation of surface subsidence on the conditions of “three-hard” in Datong mining area[J].Journal of China Coal Society,2007,32(3):235-238. |
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| Authors: | HOU Zhi-ying WANG Jia-chen |
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| Abstract: | To counter sudden roof caving and surface subsidence in large area and pillar mining in mining face underground in No.2,402 panel in Majiliang coal mine in Datong coal mining field on the condition of three-hard,analyzed the mining area mechanics behaviour by means of 3D finite difference method FLAC software.From coal seam excavating to the surface subsidence completely analyzed the distribution and the change of stress field,displacement field and damaged field in the process of mining as well as the stability of coal pillar in mining area.Put forward redistribution of stress in the mining area and Domino effect caused by unstability of coal pillar underground,resulting in sudden roof caving in the gob and surface subsidence. |
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| Keywords: | three-hard surface subsidence numerical simulation the unstability of coal pillar Domino effect |
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