Structural characteristics and stress distribution of overlying strata in inclined stope under multi-factor coupling conditions
Xia Lei1, Qiang Wei1, Xu Lei1, Ren Xuhua2
1. Baodian Mine, Yanzhou Energy Group Co., Ltd., Jining 273513, China; 2. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Abstract： In order to analyze the overlying strata structure characteristics of inclined stope under multi-factor coupling conditions, No.3308 Face of one Mine in Shandong Province was taken as the research background, the overlying strata structure characteristics of inclined stope were studied from three aspects: the fracture law of overlying strata, the distribution characteristics of overlying strata stress field and the evolution law of plastic zone by using the comprehensive research methods of field investigation and numerical simulation. The caving of overlying strata caused by inclined mining along the working face made the overall shape of the stope appear elliptical distribution, while the caving of overlying strata caused by mining along the working face made the overall shape of the stope appeared trapezoidal distribution, and the plastic zone appeared elliptical shape as a whole. Moreover, due to the layout of the working face along the fault and the accumulation of gangue, the roof of the stope presented a more complicated stress environment. Combined with the previous analysis and the actual situation on site, the roof control suggestions were proposed.
