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在阿舍勒铜矿深部不同中段选取3个测试点,采用套孔应力解除法进行了现场地应力测试分析,准确确认深部岩体处于较高地应力状态。采用数值模拟计算方法,计算得出最大主应力与巷道轴线夹角分别为0°、30°、60°、90°时的巷道围岩位移场、应力场和塑性区云图,分析了深部高应力巷道开挖方向对其稳定性的影响,得出了高应力巷道开挖时,巷道布置方向与最大主应力方向夹角在30°以内时,高地应力对巷道稳定性影响较小的结论。
Three test points were selected in the middle of the deep Ashele copper mine, and the test of stress in the soil was conducted by the stress relief method of the sleeve hole. It was confirmed that the deep rock mass was in a state of high stress. The numerical simulation method is used to calculate the displacement field, stress field and plastic zone cloud image of surrounding rock with maximum principal stress and laneway angle of 0 °, 30 °, 60 ° and 90 °, respectively. The deep high stress The influence of the excavation direction on the stability of the roadway is analyzed and the conclusion is drawn that the influence of the high ground stress on the stability of the roadway is small when the angle between the direction of the roadway and the direction of the maximum principal stress is less than 30 °.