China Safety Science Journal ›› 2025, Vol. 35 ›› Issue (S1): 86-92.doi: 10.16265/j.cnki.issn1003-3033.2025.S1.0014

• Safety engineering technology • Previous Articles     Next Articles

Measurement of geostress and analysis of influencing factors in Maiduoshan Coal Mine

ZHANG Shunfeng1(), LAN Tianwei2,3,**(), ZHANG Yueheng1, ZHAI Zhenrong1, GUO Weiqiang4, ZHANG Qi5   

  1. 1 Shenhua Geological Exploration Company Limited, Beijing 100085, China
    2 Ordos Research Institute, Liaoning Technical University, Ordos Inner Mongolia 017010, China
    3 College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China
    4 Ningxia Coal Industry Co., Ltd., CHN Energy, Yinchuan Ningxia 750001, China
    5 Fuxin Mining (Group) Co., Ltd., Fuxin Liaoning 123000, China
  • Received:2025-02-09 Revised:2025-04-17 Online:2025-06-30 Published:2025-12-30
  • Contact: LAN Tianwei

Abstract:

In order to reveal the key role of the geostress on the stability of the surrounding rocks of mining engineering and the evolution mechanism of mine power disasters (such as impact ground pressure), taking Maiduoshan Coal Mine was taken as an engineering example. Firstly, the geostress was measured by the hydraulic fracturing method; then, the fault model was constructed via the finite element analysis software, Ansys. Finally, the distribution characteristics of the geostress field and its influencing factors were investigated by combining the numerical simulation and the geomechanical analysis. The results show that horizontal compressive stress dominates the geostress field in Maiduoshan Coal Mine, and the stress value increases linearly with the increase in burial depth; faults are the main factors affecting the change of the geostress direction, and the direction of the geostress at the end and middle of the faults can be deflected by 35-50° and 7-12°, respectively; the size of the faults and the fracture displacement significantly affect the range of the stress perturbation. Moreover, the ratio of the boundary stresses and the stratigraphic dip angle has a significant effect on the geostress state; the increase of the boundary stress ratio leads to the stabilization of the stress direction near the faults, and the increase in the stratigraphic dip angle leads to the decrease in the differential stress.

Key words: geostress, faults, fault displacement, boundary stress, stratigraphic dip angle

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