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| Study on in-situ stress measurement of roadway surrounding rock in deep mining area |
| Li Hongyou1, Yao Fangxing2 |
| 1. Guotun Mine, Linyi Mining Group Heze Coal and Electricity Co., Ltd., Heze 274000, China; 2. School of Civil
Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China |
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Abstract The relationship between in-situ stress and surrounding rock strength is the main factor affecting the surrounding rock deformation of coal roadway, and the magnitude and direction of in-situ stress play a decisive role in the stability of surrounding rock of coal roadway. Therefore, it is of great practical significance to strengthen the in-situ stress test and analysis of roadway surrounding rock.The hollow inclusion method was used to measure the in-situ stress in deep mining area, and the results showed that the average value of the maximum horizontal principal stress of the mine was 15.7MPa, which was 0.60-0.62 times of the minimum horizontal principal stress. The difference between the two was small, which was conducive to roadway stability. Based on the common stress level judgment standard, the underground ground stress of the coal mine was generally in the low and medium ground stress value area, and the three-dimensional distribution law of ground stress around the roadway surrounding rock in the mining area was revealed.
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