空心包体在郓城煤矿中地应力测试的应用

Application of Hollow Inclusion Cell in Geostress Survey in Yuncheng Coal Mine

简述了空心包体地应力测试方法测试原理和计算方法,在山东郓城煤矿一采区轨道下山和辅助石门等4个位置进行了地应力实测。测试位置埋深-815～-845 m。测试结果表明,最大主应力为水平地应力,方向为NE81.65°～97.68°,水平应力与竖直应力比为1.32～1.37,最大水平应力达到30.28～38.21 MPa,表明郓城煤矿一采区处于高应力地区。采区巷道布置应沿着NE方向水平布置,能够有效地回避水平构造应力的影响。在巷道支护设计中应主要考虑水平应力。通过地应力实测,为郓城煤矿提供了一采区地应力分布规律,为一采区巷道布置和巷道支护设计提供了基础地质资料。

The test principles and calculation methods of stress measurement for hollow inclusion cell are briefly described. The geostress is measured in 4 locations, such as downhill track and auxiliary Shimen in the first mining area of Yuncheng Coal Mine and the test in the depth is between-815 m and-845 m. According to the measured monitoring results of the original rock stress, the stress field’s maximum principal stress is the horizontal stress, in the direction between NE81.65°and 97.68 °, the ratio of horizontal stress to vertical stress is between 1.32 and 1.37 and the maximum principal stress is between 30.28 MPa and 38.21 MPa, indicating that the first mining area of Yuncheng Coal Mine is in high stress area. The tunnel layout in mining area should be horizontally arranged along the NE direction, which can effectively avoid the influence of horizontal tectonic stress. In the tunnel support design, the horizontal stress should be mainly considered. The measured geostress provides a regular pattern of geo-stress distribution in Yuncheng Coal Mine area and it can provide the basic geological data for the tunnel layout and roadway support design in a mining area.