Prevention and Practices on Mine Rock Burst from Seam with High Burst Tendency in Over 1000m Deep Mine

According to the mining depth of No.4 seam in Huafeng Mine was over 1 150 m and the seam with the high bumping tendency and the immediate roof wi th medium pressure bumping tendency, the coal mining face would face a serious rock burst danger and other problems during the mining process.In order to prevent th e rock burst occurred in the mining period, a regional pressure releasing, mining in the upper and lower liberated seams, constructed large diameter pressure releasing borehole with diameter of 108 mm, depth of 30 m and space of 2.5 m between boreholes and other measures conducted for the standby coal mining face.When the stre ss of the standby coal mining area was reduced by 30%50%, the micro seismic monitoring and measuring, mine seismic monitoring and measuring, ground sound monit oring and measuring, stress monitoring and measuring, drilling cuttings monitoring and measuring and other technology were applied to monitor and measuring the coal mining face during the mining process.The practices showed that the regional pressure releasing and the rock burst monitoring and measuring technology conducted in the standby coal mining face could effectively prevent the destructive rock burst occurred.