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| In situ stress measurement and its application in Anju Mine |
| Zhang Shulei1, Yu Haifeng1, Zhang Ning1, Li You2 |
| 1. Yangcheng Mine, Shandong Jikuang Luneng Coal Power Co., Ltd., Jining 272502, China; 2. College of energy and mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China |
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Abstract situ stress is the fundamental force that causes various engineering geological disasters. Based on the in-situ measurement of Anju Mine, some suggestions on roadway design and maintenance were put forward. The main conclusions were as follows: ①the average maximum principal stress of the mine was 50.57 MPa, and the direction is 118.47°(E28.47°S);②The mine was absolutely dominated by horizontal stress σH＞σv＞σh type stress field, and belonged to the super-high stress region in the magnitude; ③The average error of the vertical principal stress of the mine was not more than 6%, and the lateral pressure coefficient λ 1.15 ~ 1.41 with an average of 1.28;④The primary support strength of roof and floor should be strengthened for roadway support. The research results of this paper were of great significance to the safe and efficient production of coal mines.
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