| 采场覆岩失稳破坏的数值模拟研究 |
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| 引用本文： | 孙显龙,高尔新,陈孝国.采场覆岩失稳破坏的数值模拟研究[J].煤炭技术,2014(10):161-163. |
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| 作者姓名： | 孙显龙 高尔新 陈孝国 |
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| 作者单位： | 中国矿业大学(北京)力学与建筑工程学院;黑龙江科技大学理学院 |
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| 基金项目： | 黑龙江省教育厅科学技术研究项目(12531577) |
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| 摘 要： | 以某煤矿为例,通过数值模拟分析采场稳定性与采矿步距的关系。分析结果表明:煤层的开采破坏了岩层原始平衡状态,并使应力重新分布,随着采矿步距的增大,靠近边界的岩体最先发生破坏。当采矿步距推进至40 m时岩体边界出现破坏单元,当超过50 m时发生岩体的宏观破坏,之后便出现顶板冒落甚至坍塌现象。表明采空区跨度在40~50 m时,岩层还能靠自身的强度保持采场的稳定状态,随着采场的扩大便出现顶板坍塌现象,继而表现出地表沉陷。该模拟为后期煤层的开采提供了有利的技术支持。
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| 关 键 词： | 煤层开采 数值模拟 RFPA 采矿步距 |
Study on Failure of Overlying Strata Above Stope by Numerical Simulation |
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| SUN Xian-long;GAO Er-xin;CHEN Xiao-guo.Study on Failure of Overlying Strata Above Stope by Numerical Simulation[J].Coal Technology,2014(10):161-163. |
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| Authors: | SUN Xian-long;GAO Er-xin;CHEN Xiao-guo |
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| Affiliation: | SUN Xian-long;GAO Er-xin;CHEN Xiao-guo;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing);School of Science, Heilongjiang University of Science and Technology; |
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| Abstract: | This analyses the relationship between stability of underground stope and the caving space by using a coal mining as the research object. The results indicated that coal mining damaged the initial equilibrium state of rock formation and rearranged the stress, as the increasing of caving space,rock damage occurred nearby boundary. There were failed elements when caving space reached to 40 m, macroscopical damage occurred when caving space reached over 50 m. Since then collapse of stope roofs occurred. The results indicated that rock formation remained stable with its strength when the span of coal mine gob reached to 40~50 m. The numerical simulation provided powerful and technical support for coal mining. |
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| Keywords: | coal mining numerical simulation RFPA caving space |
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