| 走向煤柱对近距离煤层大采高综采面矿压影响 |
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| 引用本文： | 王晓振,许家林,朱卫兵,施喜书,刘文涛.走向煤柱对近距离煤层大采高综采面矿压影响[J].煤炭科学技术,2009,37(2). |
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| 作者姓名： | 王晓振 许家林 朱卫兵 施喜书 刘文涛 |
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| 作者单位： | 煤炭资源与安全开采国家重点实验室,江苏,徐州,221008;中国矿业大学矿业工程学院,江苏,徐州,221008
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| 基金项目： | 国家重点基础研究发展规划(973计划)，教育部新世纪优秀人才支持计划，中国矿业大学青年科研基金 |
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| 摘 要： | 为了掌握走向煤柱对近距离煤层6.3 m采高综采面矿压的影响规律,基于补连塔煤矿32301工作面矿压实测结果,从覆岩结构变化的角度对煤柱作用机理进行了分析.结果表明,走向煤柱区域下初次来压和周期来压步距为39和19 m,均大于上煤层采空区下的初次来压和周期来压步距32和17 m.在上煤层采空区域下,周期来压阶段支架平均载荷比初次来压大4%,动载系数大11.7%,差异明显,而走向煤柱区域下差异均很小.下煤层开采时上覆岩层中是否仍存在完好的承载结构是导致来压步距、支架载荷和动载系数出现差异的主要原因.
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| 关 键 词： | 走向煤柱 大采高 矿压规律 关键层 |
Strike Coal Pillar Affected to Strata Pressure of Fully Mechanized Longwall Mining Face with High Cutting Height in Closed Distance Seam |
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| WANG Xiao-zhen,XU Jia-lin,ZHU Wei-bing,SHI Xi-shu,LIU Wen-tao.Strike Coal Pillar Affected to Strata Pressure of Fully Mechanized Longwall Mining Face with High Cutting Height in Closed Distance Seam[J].Coal Science and Technology,2009,37(2). |
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| Authors: | WANG Xiao-zhen XU Jia-lin ZHU Wei-bing SHI Xi-shu LIU Wen-tao |
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| Affiliation: | 1.State Key Lab of Coal Resources and Safety Mining;Xuzhou 221008;China;2.School of Mining Engineering;China University of Mining and Technology;China |
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| Abstract: | In order to master the influence law of the strike left coal pillar to the strata behavior of the 6.3 m cutting height fully mechanized longwall face in a closed distance seam,base on the strata behavior site measurement results of the No.32301 coal mining face in Bulianta Mine,the paper analyzed the coal pillar function mechanism from the point of the over strata structural variation.The results showed that the primary pressurization distance and the periodical pressurization distance in the left coal pill... |
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| Keywords: | abandoned coal pillar high cutting height strata behavior key stratum |
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