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为了掌握山体浅埋煤层原岩应力场的分布规律,运用数值计算的方法,研究了山体浅埋煤层原岩垂直应力与水平应力的分布特征、上覆岩层的垂直应力分布特征、应力梯度的变化。垂直原岩应力分布形式与地表形态非常相似;水平原岩应力在埋深较大处的岩层软弱面结合处有应力集中现象。山体浅埋煤层及断裂带老顶上的垂直原岩应力呈线性变化;在埋深较大处,应力值较大,埋深较小处,应力值较小;沿煤层倾斜方向垂直原岩应力变化梯度较大。研究结果可为类似条件下工作面的支护参数的选取提供借鉴。
In order to grasp the distribution law of the stress field of the shallow rock seam in mountainous area, the distribution characteristics of the vertical stress and horizontal stress of the original rock in the shallow seam, the vertical stress distribution characteristics of the overlying rock strata, the change of the stress gradient . The distribution of vertical original rock stress is very similar to that of the ground surface. The stress of the horizontal original rock is concentrated at the junction of weakness of rock strata with larger depth. The vertical original rock stress of the mountainous shallow coal seam and the fault roof changes linearly. At the deep buried depth, the stress value is larger and the buried depth is smaller, and the stress value is smaller. The vertical original rock stress along the coal seam inclined direction Change gradient larger. The research results can provide reference for the selection of supporting parameters of working face under similar conditions.