Prevention Technology and Mechanism of Coal Pillar Rock Burst in Large Space Structure Area

To reduce burst strata behaviors frequency and power in mining area coal pillar areas, we propose that the deep well mining area coal pillar has rigid nuclear body, impact nuclear body and flexible layer. Impact nuclear body characteristics and change laws in the pillar were studied. It reveals occurrence mechanism of rock burst in deep mining area coal pillar areas. Technology system of the prevention and treatment as well as monitoring and warning of rock burst in deep mining area coal pillar areas was constructed. Through the field practice application and effect test, strata behaviors frequency and power in mining area coal pillar areas was reduced by prevention technology, and rock burst in deep mining area coal pillar was eliminated effectively.