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| Study on the distribution law of in-situ stress in Guotun Mine |
| Yin Maosheng1， Zhao Renbao2， Meng Shengshi2， Zheng Yining2 |
| 1. College of Energy and Mining Engineering， Shandong University of Science and Technology, Qingdao 266590, China；
2. Guotun Coal Mine, Luxi Mining Group, Heze 274000, China |
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Abstract In-situ stress is the basic force for the deformation and failure of roadway surrounding rock. Analyzing the distribution characteristics of in-situ stress field is of great significance for roadway design and maintenance. In this paper, the distribution law of in-situ stress in Guotun Mine was systematically studied by means of theoretical analysis, field measurement and regression fitting. The main research results were as follows: (1) According to the geological structure characteristics, the maximum principal stress direction of Guotun Mine was NWW-SEE; (2) The field measurement showed that the average value of the maximum principal stress in Guotun Mine was 37.19 MPa, and the direction was 143.6 ° (SE36.4 °); (3) The side pressure coefficient λ was 1.734, which was linear with the buried depth. The research results of this paper provided an important reference for the reasonable layout of roadway and the design of support parameters in Guotun Mine, and were of great significance for the safety and efficient production of the mine.
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