近距离煤层群开采下层煤开切眼位置的确定

发布时间：2018-07-06 08:59

本文选题：近距离煤层 + 底板破坏　；参考：《中国煤炭》2017年04期

【摘要】：为了确定近距离煤层群开采时下煤层开切眼的合理位置,本文在对木瓜矿9~#煤层和10~#煤层近距离煤层开采地质条件分析的基础上,对上层9~#煤层开采后底板破坏深度及煤柱下方的支承压力分布情况及影响范围进行了力学计算,理论计算结果表明,10~#煤层回采巷道与9~#煤层巷道的内错距需不小于15 m;此外,利用FLAC3D有限元数值模拟软件对9~#煤层采后围岩应力与岩层移动情况进行分析,并在此基础上进一步分析其对下煤层矿压的影响,通过对比研究最终确定10~#煤层合理开切眼的位置,与理论计算结果基本一致,该布置方式可为近距离煤层群下煤层开采开切眼位置的选择提供一定的借鉴意义。
[Abstract]:In order to determine the reasonable position of coal seam opening and cutting under the condition of close distance coal seam group mining, this paper analyzes the geological conditions of the close distance coal seam mining in 9 # coal seam and 10 # coal seam of papaya mine. In this paper, the failure depth of floor and the distribution of supporting pressure under coal pillar and the influence range are calculated by mechanics. The theoretical calculation results show that the inner fault distance between mining roadway and coal seam No. 9 # coal seam is not less than 15 m, in addition, the internal dislocation distance between the mining roadway and the coal seam roadway is not less than 15 m. FLAC3D finite element numerical simulation software is used to analyze the stress of surrounding rock and the movement of rock layer after mining in No. 9 coal seam, and on the basis of this, the influence of FLAC3D on the rock pressure of coal seam is further analyzed. Through the comparative study, the reasonable opening and cutting position of 10 # coal seam is determined, which is basically consistent with the theoretical calculation results. This arrangement can provide certain reference significance for the selection of the cutting hole position of coal seam mining under the close distance coal seam group.
【作者单位】：中国矿业大学(北京)共伴生能源精准开采北京市重点实验室;
【基金】：国家重点研发计划(2016YFC0600708) 大学生创新实验计划(C201601018)
【分类号】：TD823.81

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