The Law and Prevention and Control of Strong Ore Pressure in Xiaozhuang Coal Mine
Aiming at the problem of roof disaster caused by strong mine pressure caused by mining dis-turbance,the 40205 working face of Xiaozhuang Coal Mine is taken as the engineering background.Through the on-site support resistance and microseismic monitoring data,the three times of pressure affecting the safe production of the working face are analyzed and compared.The results show that the first weighting step dis-tance of the working face is about 58 m,the periodic weighting step distance is 26 m,and the support resis-tance increases by about 8 MPa in a short time.When the first weighting and the second weighting of the working face,the average working resistance of the support is basically 11 000 kN,and some large energy microseismic events occur.The maximum working resistance is more than 16 000 kN at the third pressure,and the energy events are the most at the third pressure.The three pressure intensity shows an increasing trend and the working resistance of the middle and rear brackets is greater.According to the law of strong mine pressure behavior in large mining height working face,the comprehensive prevention and control are carried out from the on-site mine pressure monitoring management and pressure relief regulation,which is of great significance to the treatment of strong mine pressure behavior under the same type of large mining height.
large mining heightstrong ore pressuresupport resistancemicroshock eventprevention and control measures
万方数据
维普
