Dynamic Load Ground Pressure Control Technology for Bulianta Coal Mine 7 Meters Large Mining Height Fully Mechanized Coal Face Passing Through Stress-concentrated Coal Pillar

To solve the problem of strong ground pressure when shallow buried depth and close distance fully mechanized coal face passes through overlying stress-concentrated coal pillar, taking 22307 large mining height fully mechanized coal face as the research object, we analyze strata behavior characteristics and laws when working face passes through overlying stress-concentrated coal pillar, combining with geological conditions, coal seam occurrence conditions of coal and other similar mines experience and research achievements from scientific research institution, we accordingly propose safety technical measures including reasonable schedule for allocation advancing and maintenance, the use of reasonable mining height, replacing and verifying relief valve, face angle adjusting and strengthening mine pressure observation, which effectively avoids hydraulic support push-down, working face roof caving, roadway rib spalling and the harm of bolts or cables splash hurt due to the strong and long mine pressure when 22307 fully mechanized coal face passes through overlying stress-concentrated coal pillar, and realizes safety mining of working face.