坚硬顶板工作面矿压显现影响因素数值分析

Numerical analysis of influencing factors of rock pressure appearance in hard roof working face

采用UDEC数值模拟软件对坚硬顶板工作面矿压显现特征进行了分析,基本顶厚度和强度增加,工作面超前支承压力峰值增大、影响范围增大;采高增加,覆岩运动范围加大,超前支承压力影响范围增加,矿压显现强度增高;直接顶厚度增加,超前支承压力量值明显减小,工作面矿压显现强度降低;工作面推进速度越快,超前支承压力峰值越高、影响范围越小,峰值位置距工作面越近。

Using UDEC numerical simulation software,analyzed the mine pressure behavior characteristics of hard roof working face, basic roof strength and thickness increase, the peak value of advanced abutment pressure of working face increases, the influence range increase; mining height increases, the movement range of the overlying rock increase, the advanced abutment pressure influence range increase, strata behavior strength increased directly; the thickness of immediate roof increase, the abutment pressure decreased significantly, reduce the strata behavior strength of working face. The mining speed of the working face is faster, the peak value of advanced abutment pressure is higher, the influence range is smaller, and the peak position is closer to the working face.