寺河煤矿三维地应力场分布和巷道布置优化

3D geostress field distribution and roadway layout optimization in Sihe Mine

采用井下现场测量和理论分析相结合的方法,研究了晋城煤业集团寺河煤矿东采区3号煤层的三维地应力场分布和最优巷道布置方向,确定了该区域的地应力场形式为σHV型,属于典型的构造应力场。分析了在该类型的地应力场中,最优巷道布置方向与最大主应力方向的关系。研究结果表明:最优巷道布置方向不是沿着最大主应力的方向,而是与其成一定夹角,夹角大小取决于3个主应力的比值;当夹角不大于30°时,构造应力对巷道围岩稳定程度的影响较小。

Based on the joint method of in-situ measurement and theoretical analysis,the 3D geostress field distribution and the optimal direction of roadway axis were studied for No. 3 coal seam of east mine section in Sihe Mine of Jincheng Anthracite Mining Group. The type of geostress field in this section was defined to be σHV belonging to the classical tectonic stress field. The relationship between the optimal direction of roadway axis and the direction of the maximum principal stress was analyzed in this type of geostress field. The research results indicate that the optimal direction of roadway axis is not parallel to the direction of the maximum principal stress,but has a certain angle to it. The angle dimension is determined by the ratio of the three principal stresses. In addition,the effect of tectonic stress on the stability of the roadway is smaller while the angle is not greater than 30°.