深埋回采巷道围岩塑性区演化规律研究

Study on the Evolution Law of Plastic Zone in Surrounding Rock of Deep Mining Tunnel

针对深埋厚煤层回采巷道围岩破坏严重的问题,以薛虎沟矿2-111工作面运输巷为工程背景,研究了回采巷道塑性区形态特征及其在采动应力作用下的演化规律。研究表明:受工作面回采的影响,厚煤层回采巷道区域主应力场的大小和方向发生改变;随着与工作面距离的减小,回采巷道两肩角处塑性区不断向深部扩展。此研究成果可为深埋厚煤层开采方案设计、回采巷道支护参数确定等提供参考借鉴。

In response to the problem of severe damage to the surrounding rock of the deep buried thick coal seam mining roadway,the plastic zone morphology characteristics of the mining roadway and its evolution law under mining stress were studied using the transportation roadway of the 2-111 working face in Xuehugou Mine as the engineering background.Research has shown that the size and direction of the main stress field in the thick coal seam mining roadway area have changed due to the influence of mining at the working face.As the distance to the working face decreases,the plastic zone at the two shoulder corners of the mining roadway continues to expand deeper.This research achievement can provide reference for the design of deep buried thick coal seam mining schemes and the determination of support parameters for mining tunnels.