沿空掘巷综放开采卸压巷布置方式优化研究

发布时间：2018-04-17 14:37

本文选题：沿空掘巷 + 卸压巷　；参考：《煤炭科学技术》2017年02期

【摘要】：为了解决小煤柱沿空掘巷综放开采过程中沿空巷道矿压显现剧烈、变形严重的难题,采用本煤层布置卸压巷的方法对沿空巷道进行围岩控制,通过数值模拟方法研究了卸压巷在厚煤层的层位、卸压巷与沿空巷的巷道中心距、卸压巷的面积3个因素对卸压巷的卸压效果的影响,并对卸压巷的布置方式进行优化。结果表明:布置卸压巷降低了实体煤应力集中系数,减小应力集中区域面积,使应力集中向煤体深部转移,减小了沿空巷道围岩应力;最优化卸压巷布置方式是卸压巷在厚煤层中挑顶布置,巷道中心距为沿空巷道宽度的2.7~3.2倍,巷道尺寸与沿空巷道相同。该布置方式运用在现场,取得良好技术经济效益。
[Abstract]:In order to solve the problem of severe mine pressure and serious deformation in fully mechanized caving roadway along goaf with small coal pillar, the surrounding rock of goaf roadway is controlled by the method of placing decompression roadway in this coal seam.Through the numerical simulation method, the influence of three factors on the pressure relief effect of the pressure relief roadway is studied, including the position of the relief roadway in the thick coal seam, the center distance between the relief roadway and the roadway along the goaf, and the area of the relief roadway, and the layout of the decompression roadway is optimized.The results show that the stress concentration coefficient of solid coal is reduced, the area of stress concentration area is reduced, the stress concentration is transferred to the deep part of coal body, and the surrounding rock stress along goaf is reduced.The optimum layout of pressure relief roadway is that the pressure relief roadway is in the thick coal seam, the center distance of the roadway is 2. 7or 3. 2 times of the width of the roadway along the goaf, and the size of the roadway is the same as that along the gob roadway.The layout is applied in the field, and good technical and economic benefits are obtained.
【作者单位】：山东科技大学矿山灾害预防控制-省部共建国家重点实验室培育基地;山东科技大学矿业与安全工程学院;山东新巨龙能源有限责任公司;
【基金】：国家自然科学基金资助项目(51274133;51374140) 高等学校博士学科点专项科研基金资助项目(20123718110013)
【分类号】：TD822.2

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