Study on the Method of Prevention and Control of Dynamic Disasters in Isolated Island Face

In order to study the safe mining method of isolated island coal face, the stratum movement and stress condition of the island's working area are analyzed theoretically, and the criterion of safe mining in isolated island coal face was put forward. The paper holds that rational mining parameters can avoid the occurrence of dynamic disasters in island coal face. And results indicates that, When the island coal face length is greater than the sum of abutment pressure range of nearby coal faces, abutment pressures can not superpose, so that the coal face is relatively safe. When the length of the nearby coal face is greater than the fracture length of the key stratum, the key stratum can collapse. In this collapse, there is no danger of dynamic pressure in the island coal face, so that there is no risk of rockburst; and there is no risk when tunneling the mining gateway in a stable internal stress field.