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为研究煤矿深部原岩应力对巷道围岩破裂范围的影响规律,采用空心包体法在郓城千米埋深煤矿井底车场进行地应力实测,得到了煤矿深部原岩应力状态,并应用声波测试方法,测量得到了不同巷道帮部的围岩破裂范围。将原岩应力转化为与巷道帮部直墙面平行截面上的初始径向应力和初始剪切应力,研究不同初始应力状态下巷道围岩破裂范围发现:初始径向应力对深部围岩破裂范围影响较为显著,且初始径向应力越大破裂范围就越小;而初始剪切应力对围岩破裂范围的影响显著性较小。此外,实测结果还证实了围岩岩性和巷道断面大小是影响围岩破裂范围的重要因素。
In order to study the influence law of the original deep rock stress on the rupture range of the surrounding rock in the coal mine, the hollow encasement method was used to measure the geostress in the underground parking lot of the Tancheng km underground coal mine, and the original rock stress state was obtained, Test method, measured by different gangway rock breakage range. The original rock stress is transformed into the initial radial stress and the initial shear stress parallel to the straight wall of the tunnel gangway. The rupture range of the surrounding rock in different initial stress states is found: the initial radial stress affects the rupture range of the deep surrounding rock The impact is more significant, and the smaller the initial radial stress is, the smaller the fracture range is. However, the initial shear stress has a less significant effect on the surrounding rock fracture range. In addition, the measured results also confirmed that the surrounding rock lithology and tunnel section size is an important factor affecting the surrounding rock rupture.