论文部分内容阅读
以新疆某煤矿急倾斜特厚煤层采煤工作面为工程背景,运用FLAC数值模拟软件对采后顶底板运动特征进行模拟研究,为相似赋存条件下的煤层开采提供了瓦斯涌出路径和预防顶板事故的理论基础。结果表明:随工作面煤层的开采,两侧顶板岩层中垂直应力分布表现为工作面前方出现应力升高区、峰值区和降低区,应力集中程度最大。煤层采出后,上覆岩层压力得到释放,在顶板产生一定深度的卸压区,其应力值仅有0.5 MPa。
Taking the coal mining face in a steeply-inclined and extremely thick coal seam of a coal mine in Xinjiang as the engineering background, FLAC numerical simulation software was used to simulate the movement characteristics of the roof and floor after mining, providing the gas emission path and prevention for the coal mining under the similar conditions The theoretical basis of roof accident. The results show that with the mining of coal seam in the working face, the vertical stress distribution in the rock strata on both sides shows the stress increasing zone, peak zone and decreasing zone in front of working face, and the stress concentration is the highest. After the coal seam is mined out, the overburden pressure is released, and a certain depth of pressure relief zone is generated on the roof. The stress value is only 0.5 MPa.