极近煤层大采高综采面矿压显现规律

Mine Strata Pressure Behavior Law of Large Mining Height Fully Mechanized Face in Contiguous Seams

结合962工作面煤层赋存情况,运用数值模拟软件FLAC3D建立几何模型,对极近距离煤层大采高综采面的矿压显现规律进行模拟研究。分析了工作面超前支承压力的影响范围及工作面倾斜方向的垂直应力分布规律。通过多点位移计对巷道顶板深部岩体变形进行的观测,验证了数值模拟分析的超前支承压力影响范围,并结合钻孔窥视得出了巷道塑性区范围,对矿区相类似条件的超前支护范围的确定及回采巷道支护参数的选取具有一定的指导意义。

Combined with the seam deposit features of 962 coal mining face into consideration,the mine strata pressure behavior law of the large mining height fully mechanized face was analyzed by FLAC3 D.The influence scope of lead abutment pressure and the stress distribution law of vertical stress along incline direction were analyzed. The deep rock mass deformation of tunnel roof was analyzed by multi-point extensometer. The influence scope of lead abutment pressure by FLAC3 Dwas verified by the observation results of multi-point extensometer. And the plastic area of the tunnel was determined. It has certain guiding meaning on the determination of the range of ahead supporting support selection and selection of support parameters of the mining gateway for other similar condition mines.