In order to reduce the error of ground stress testing by hydraulic fracturing method and improve the success rate of ground stress testing and the accuracy of test results,a surrounding rock structure test system was introduced to carry out a control test of ground stress testing with 8510 return air lane of a mine as the research background.The test results show that the maximum horizontal princi-pal stress and vertical principal stress are 8.14 MPa and 11.06 MPa respectively,and the vertical structural stress is dominant,and the pressure ratio ranges from 0.40 to 0.74 when the surrounding rock test system is not introduced.After the introduction of the surround-ing rock structure testing system,the maximum horizontal principal stress and vertical principal stress of 8103 return air lane are 14.95 MPa and 11.04 MPa,and the horizontal structural stress is dominant,and the pressure measurement ratio ranges from 0.69 to 1.35,which is in good agreement with the measured ground stress field in the region.The hydraulic fracturing method introduced into the surrounding rock structure testing system is convenient and fast to measure the ground stress,and the measured results are more real and reliable.
ground stress testingsurrounding rock structure observationhydraulic fracturing methodsurrounding rock stress
万方数据
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