采空下近距离煤层巷道位置确定和支护参数研究
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摘要
以西铭矿49405工作面皮带巷的巷道位置确定、支护形式确定的工程实际为基础。利用理论计算与现场调研的方法详细分析了近距离煤层上煤层采空时上煤层残余煤柱对下煤层回采巷道的影响,确定了西铭矿49405工作面皮带巷的位置应当为距8#煤层残余煤柱内错20 m;确定49405工作面皮带巷采用11#矿用工字钢架棚支护,棚间距为0.8 m,经过现场实测,在工作面回采时巷道两帮相对移近量为75 mm,巷道顶底板移近量为99 mm。符合回采巷道变形要求,有效保障了该矿的安全、高效回采。为该矿后续工作面回采巷道位置选择与支护参数确定提供了依据,为相似矿井提供了借鉴。
Based on the engineering practice of determining the location and supporting form of belt roadway in 49405 working face of Ximing Mine.The influence of residual pillars of upper coal seam on mining roadway of lower coal seam is analyzed in detail by means of theoretical calculation and field investigation.It is determined that the location of belt roadway of 49405 working face in Ximing Mine should be 20 m away from the residual pillars of 8# coal seam,and that belt roadway of 495 working face should be supported by I-shaped steel roof of 11# coal mine,with the spacing of 0.8 m.After field measurement,the location of belt roadway of 49405 working face should be 20 m away from the residual pillars of 8# coal seam The relative displacement of two sides of roadway is 75 mm and that of roof and floor of roadway is 99 mm.It meets the deformation requirement of the mining roadway and effectively guarantees the safe and efficient mining of the mine.It provides a basis for the selection of the mining roadway position and the determination of supporting parameters in the follow-up working face of the mine,and provides a reference for similar mines.
Based on the engineering practice of determining the location and supporting form of belt roadway in 49405 working face of Ximing Mine.The influence of residual pillars of upper coal seam on mining roadway of lower coal seam is analyzed in detail by means of theoretical calculation and field investigation.It is determined that the location of belt roadway of 49405 working face in Ximing Mine should be 20 m away from the residual pillars of 8# coal seam,and that belt roadway of 495 working face should be supported by I-shaped steel roof of 11# coal mine,with the spacing of 0.8 m.After field measurement,the location of belt roadway of 49405 working face should be 20 m away from the residual pillars of 8# coal seam The relative displacement of two sides of roadway is 75 mm and that of roof and floor of roadway is 99 mm.It meets the deformation requirement of the mining roadway and effectively guarantees the safe and efficient mining of the mine.It provides a basis for the selection of the mining roadway position and the determination of supporting parameters in the follow-up working face of the mine,and provides a reference for similar mines.
引文
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[2]于洋,神文龙,高杰.极近距离煤层下位巷道变形机理及控制[J].采矿与安全工程学报,2016,33(1):49-55.
[3]张忠温,吴吉南,范明建,等.近距离煤层采空区下巷道支护技术研究与应用[J].煤炭工程,2015,47(2):37-40.
[4]高建军,张忠温.平朔矿区近距离煤层采空区下巷道支护技术研究[J].煤炭科学技术,2014,42(5):1-4+8.
[5]杨智文.极近距离煤层多采空区下巷道稳定性影响因素及支护对策研究[J].中国煤炭,2014,40(4):60-64.
[6]王建平,王炳文,邓鹏海,等.近距离煤层采空区下回采巷道矿压显现规律研究[J].煤炭技术,2014,33(4):109-112.
[7]孔德中,王兆会,任志成.近距离煤层综放回采巷道合理位置确定[J].采矿与安全工程学报,2014,31(2):270-276.
[8]刘鸿文.高等材料力学[M].高等教育出版社,1985.
[9]刘承明.矿用工字钢棚支护计算及应用[J].机械管理开发,2018,33(7):58-59+244.