Numerical simulation of rock burst prevent scheme that pre-heading unloading chamber in deep island coal mining face

Aimed at rock burst symptom occurred in the roadway of one deep island coal mining face, the rock burst prevent scheme which pre-heading unloading chamber in roadway was put forward. Based on the geological condition of coal mine, we built the plane strain simulation model and do research on the impact of island coal mining face caused by induced working face. Moreover, three dimensional model of unloading chamber was established to study on the equivalent stress distribution characteristic of roadway floor, before and after the heading of unloading chamber. Meanwhile, the unloading effort was analyzed. The result shew that the scheme can obviously reduce the stress of roadway floor and transfer the stress concentration position from roadway floor to unloading chamber. Thus, it can do unload the pressure efficiently, as well as supply reference to preventing and solution of rock burst.