基于ASR法的底板隔水层原始地应力分布研究

Research on Original Stress Distribution of Floor Aquifuge Based on Anelastic Strain Recovery Method

针对煤矿水害防治领域隔水层性能研究中地应力测试需求,将油气田勘探开发中应用比较成熟的非弹性应变恢复(ASR)地应力测试方法引入。该方法利用钻孔取岩心开展地应力测量,对其原理、测试流程、样品采取及应变计布置、主应力和方向计算等方面进行系统阐述。实例显示:保德煤矿11#煤底板地应力状态表现为正断层应力环境,水平最大主应力介于5.3~7.9MPa,最小主应力介于4.7~7.3 MPa,水平最大主应力方向介于NE46.9°~NE69.5°。

According to the requirements of ground stress test in the research of aquifuge on the coalmine water hazard control field, this paper introduced anelastic strain recovery method（ASR）which is maturely used in the field of petroleum exploration and development. Ground stress is measured by core-drilling through this method, and its principle, testing process, samples sampling and the main stress and directions calculation were described in detail. The example showed that： the crustal stress state of 11^# coal floor in Baode Coal Mine is normal fault stress environment, the maximum principal stress is between 5.3 MPa and 7.9 MPa,the minimum principal stress is between 4.7 MPa to 7.3 MPa, the horizontal maximum principal stress direction is between NE46.9 ° to NE69.5 °.