| 红菱煤矿保护层开采裂隙演化规律的相似模拟实验 |
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| 引用本文： | 魏刚.红菱煤矿保护层开采裂隙演化规律的相似模拟实验[J].辽宁工程技术大学学报(自然科学版),2012(2):185-188. |
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| 作者姓名： | 魏刚 |
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| 作者单位： | 1. 沈阳煤业集团有限责任公司沈阳110122
2. 辽宁工程技术大学安全工程学院辽宁阜新123000 |
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| 基金项目： | 国家重点基础研究发展规划资助项目(2011CB201206-2) |
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| 摘 要： | 基于相似模拟实验的方法和数字散斑的测试原理,以沈煤集团红菱煤矿保护层开采为工程实例,模拟了在开采11#煤层后,对存在煤与瓦斯突出的7#煤层和12#煤层的卸压效果,从而对保护层开采后的采动裂隙分布规律进行研究.结果表明:采动对保护层上方岩体的影响程度比对下方岩体的影响程度大;最大位移量基本上是位于采空区的中部,该位置的裂隙最发育,采动裂隙密度最大,煤岩体渗透率最大;保护层上方采动影响区域垂向上距采空区60 m左右,而下方采动影响区域垂向上距采空区40 m左右.
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| 关 键 词： | 保护层 煤与瓦斯突出 采动裂隙 相似模拟 数字散斑 渗透率 裂隙 采空区 |
Similarity experiment of rock fracture evolution after covering layer exploitation in hongling coal mine |
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| WEI Gang.Similarity experiment of rock fracture evolution after covering layer exploitation in hongling coal mine[J].Journal of Liaoning Technical University (Natural Science Edition),2012(2):185-188. |
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| Authors: | WEI Gang |
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| Institution: | WEI Gang1,2(1.Shenyang Coal Trade Group Corporation Limited Liability Company,Shenyang 110122,China 2.Research Institute of Safty Technology,Liaoning Technical University,Fuxin 123000,China) |
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| Abstract: | Effect of pressure relief and fracture evolution of 7# and 12# coal seam after excavation of 11# coal seam in Hongling Coal Mine is discussed,according to similarity theorem and digital speckle technique.The results show that the range of influence upward 11# after exploitation is larger than the range around the base zone of the 11# coal seam.The largest value of displacement appears in the middle of the worked-out section,and the rock fracture in this zone is developed enough.Fracture density and rock permeability in the area metioned above have the peak value.The vertical distance of influenced area upper to the covering layer is 60 m,and the verticle distance in the bottom of the covering layer is 40 m. |
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| Keywords: | covering layer coal and gas outburst mining fracture similarity theory digital speckle permeability fracture worked-out section |
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