Research on influence of microseismic activity by working face mining in coal mine

In order to reveal the occurrence characteristics of shock bump and rock burst.The influence of working face mining on microseismic distribution are researched combined shock energy, shock times, mining speed of working face and mining stress distributin in Dongtan coal mine.The results show that nonlinear characteristics of high energy shock bump mainfest along with the mining speed increasing.Uniform and slow mining is the effective way to decrease high energy shock bump.there has always been existing a period of energy accumulation and storage before the high energy mining earthquake breaks out in a surrounding cycle of about 100 m long which demonstrates that the gap between the great distance cycle and that of the small cycle would be at about 50 m in the aforementioned working face of the mine.High energy shock bump occurrence is positive correlation to the stress environmental of all working face.Periodic pressure, working face ”square” is the frequently occurrence time interval.