Characteristics of in situ stress field in the Huainan mining area, China and its control factors

Due to the high in situ stresses, dynamic disasters occurred frequently Huainan mining area, China. Our understanding of stresses this area is still insufficient. In study, 18 sections two boreholes Xinji No. 1 coalfield were measured using hydraulic fracturing method, and distribution investigated. The relationship between stress geological structure was summarized limitation fault friction strength on discussed. result showed that maximum horizontal principal (σH) at mine 13.95–25.23 MPa, minimum (σh) 12.16–21.17 MPa. average azimuth N83.61°E. statistical results characterized by a strike-slip faulting regime. Both vertical increased approximately linearly with increase burial depth. orientation study closely related tectonic movement ratio primarily limited faults. outcomes research can provide some reliable engineering parameters benefit roadway layout support design area.