Prevention Technology of High-danger Area in Mining Face with Strong Bursting Liability

The rock-burst liability of coal seam in 250206 Mining Face of Yanbei Colliery is strong.Its roof and floor are thick sandstone which is hard and brittle.Elastic energy is easily accumulated in this type of rock.There are abundant sub-folds in direction of floor strike,which result on concentrated tectonic stress.Stress is large at the axis of syncline where an area with high bursting danger is.Therefore,this paper put forward a comprehensive prevention method on the basis of daily underground pressure monitoring and prediction.This method included water injection into coal,roof and floor and roof-broken blasting for pressure relief,which provided basis for safety and high-efficiency mining.