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针对套筒致裂法测试深井地应力存在的技术瓶颈,改进了套筒致裂法测地应力的套筒膨胀管装置;综合单孔套筒致裂法和控制致裂法的特点,提出了可操作性更强的平行钻孔-套筒致裂法地应力测试技术,通过试验对原有的单孔套筒致裂法和控制致裂法地应力计算公式进行了合理修正。由试验结果可得,单孔套筒致裂的修正系数为0.78,控制致裂的修正系数为0.83。现场地应力测试结果表明:朱集东煤矿-965 m轨道大巷最大主应力为23.16 MPa,东西水平方向;中间主应力为21.04 MPa,铅垂方向;最小主应力为13.01 MPa,南北水平方向。
Aiming at the bottleneck of testing deep geostress in sleeve cracking method and improving the sleeve expansion pipe device of geodesic cracking method in geodesy, the characteristics of integrated single-hole sleeve fracture method and controlled fracture method are proposed More feasible parallel drilling - sleeve cracking method of stress testing, through the test of the original single-hole sleeve fissure method and the control of fracture stress calculation formula was reasonably corrected. From the test results, the correction factor of single-hole sleeve cracking is 0.78 and the correction factor of control cracking is 0.83. The results of in-situ stress tests show that the maximum principal stress of -965 m orbital roadway in Zhuji East Coal Mine is 23.16 MPa and the east-west horizontal direction; the middle principal stress is 21.04 MPa and the vertical direction; the minimum principal stress is 13.01 MPa;