Characteristics of regional geostress field and its impact on rock burst: a case study on the Binchang mining area, China

The characteristics of the geostress field significantly influence the rock burst, which is closely related to regional tectonic evolution. The characteristics and cause of the geostress field as well as the mechanism of rock burst in a coal mine were analyzed using the Binchang mining area (BCMA) at the southern Ordos Basin (OB) as the study area. The relationship between the current geostress field and tectonic evolution is discussed, and the effect of the regional tectonic evolution on rock burst is analyzed. The varying damage forms of rock mass in mines under different geostress field conditions are analyzed, and the energy failure criterion of rock mass under the conditions of this damage form is discussed. The results show that the evolution of tectonic movement affects the distribution characteristics of the current tectonic stress field in the form of non-inheritance and residual inheritance. The continuous compressive tectonic movement is one of the main reasons for frequent rock bursts in the study area. Under different stress field conditions, the rock mass failure is dominated by compression shear failure. The range of deformation and damage of surrounding rock is smaller under the reverse faulting stress state of geostress field compared with other states. It is found that the elastic energy storage limit of the rock mass had a quadratic function relationship with the confining pressure. With this, the general failure criterion and energy criterion of rock mass are modified, and proposed a parameter to evaluate the risk of mine geodynamic hazards.