| 采场覆岩裂隙发育及高位钻孔优化设计——以祁南煤矿34_下2工作面为例 |
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| 引用本文： | 孟攀,叶金焱.采场覆岩裂隙发育及高位钻孔优化设计——以祁南煤矿34_下2工作面为例[J].煤田地质与勘探,2012,40(2):19-22. |
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| 作者姓名： | 孟攀 叶金焱 |
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| 作者单位： | 1. 中国矿业大学,江苏 徐州,221008
2. 郑州煤炭工业集团,河南 郑州,452370 |
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| 摘 要： | 为了有效地提高高位钻孔的瓦斯抽采效果,采用数值模拟方法分析了祁南矿34下2工作面开采过程中覆岩的裂隙发育规律和离层率变化规律。判定了煤层上覆岩层冒落带和裂隙带分布范围;确定了钻孔法距参数的最佳范围为距32煤层顶板12~22 m的岩层区域。研究成果可为其他工作面高位钻孔的优化设计提供参考。
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| 关 键 词： | 高位钻孔 数值模拟 钻孔法距 优化 |
Fracture development of overlying strata and optimization of high position boring:with working face 34low 2 in Qinan mine as example |
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| MENG Pan
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YE Jinyan.Fracture development of overlying strata and optimization of high position boring:with working face 34low 2 in Qinan mine as example[J].Coal Geology & Exploration,2012,40(2):19-22. |
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| Authors: | MENG Pan YE Jinyan |
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| Institution: | 1.China University of Mining and Technology,Xuzhou 221008,China;2.Zhengzhou Coal Industrial Group Corporation,Zhengzhou 452370,China) |
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| Abstract: | In order to improve the gas extraction effect of high position boring effectively,this paper analyzed the overlying strata fracture development regularities and the change of separation rate during mining of 34low2 working face in Qinan mine,judged the distribution range of caved zone and fractured zone in the coal seam overlying strata,determined that the best range of norm distance parameter of high position boring was 12～22 meters to 32 coal seam roofs,which provided a scientific basis for optimization of high position boring in other working faces. |
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| Keywords: | high position boring numerical simulation boring norm distance optimization |
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