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为了了解潘北煤矿上覆围岩和岩层的稳定性情况,并且研究该矿地应力场的分布特征,利用空心包体应力解除法对该煤矿-490 m东翼第二抽水巷进行了地应力测量,获得了该矿的三维地应力的大小和方向。结果表明,该区域地应力以水平应力为主导,最大主应力近东西走向,是最小主应力的1.72~1.75倍;中间主应力与垂直方向的夹角平均为6.39°,这些与该矿区的地质构造有很大的关系。根据实测的地应力结果对原支护方案进行了优化,且优化效果明显。
In order to understand the stability of surrounding rock and rock formation in Panbei coal mine and study the distribution characteristics of stress field in this mine, the stress of hollow enclave stress relieving method was applied to the second pumping lane of -490 m in the coal mine. The size and direction of the three-dimensional ground stress of the mine were obtained. The results show that the main stress in this area is dominated by horizontal stress, and the maximum principal stress is nearly east-west direction, which is 1.72 ~ 1.75 times of the minimum principal stress. The average included angle between the principal stress and the vertical direction is 6.39 °, which is consistent with the geology Structure has a great relationship. According to the measured in-situ stress results, the original support scheme is optimized and the optimization effect is obvious.