关键词: 地应力测试, 应力解除法, 空心包体, 原岩应力

Abstract: Abstract: For analysis the reason of broken gateway surrounding rock, large deformation and difficulty of support, take measurement technology of three-dimensional set of stress relief the in-situ stress and the hollow inclusion strain gauge, for in-situ stress measurement and confining pressure rate experiment at four point five borehole in the east mining area of Dong Zhou Yao mine. And elaborate the principle of the hollow inclusion stress release method test in-situ stress, the instrument and structure, detailed testing process and so on. According to analysis the result of borehole stress relief test, we get the following in-situ stress distribution law and conclusion: The mine horizontal stress as the maximum principal stress, intermediate principal stress, the vertical stress of minimum principal stress; Average ratio of the horizontal principal stress and the vertical principal stress between 1.4~2.2, the maximum horizontal principal stress direction for north east - south west direction , with the direction of the south - north about 10 ° Angle; Affected by the Himalayan tectonic movement, make original compression fracture of Yanshan tectonic movement into extensional, three sets of faults presents northeast, near north-south, northwest in the mining area, the complex stress condition is the main cause difficulty of supporting roadway in recovery. The research conclusion will provide a scientific basis for mining roadway layout and support.

Key words: in-situ stress measurement, stress relief method, hollow inclusion, stress of primary rock, tectonic movement