Study on surroundings control technology for thick coal-seam gateway with hard roof affected by intensive dynamic pressure in deep coal mine and its application

By taking the thick seam working face gateway affected by intensive dynamic pressure in deep coal mine with hard roof as engineering background, the comprehensive technology solutions combined with strength bolt-supporting and stable roof hydraulic fracturing are carried out, based on the results of geo-mechanics test, supporting effect evaluation for gateway with initial supporting parameters and analysis of stress monitoring ahead working face.The results of engineering practice show that the comprehensive technology solutions could efficiently control the gateway surroundings deformation, reduce the gateway maintenance workloads and provide great technology support for gateway reuse and efficient mining safely.