Practice of Close Distance Outburst Coal Seams Gas Comprehensive Control Technology in Zhongling Coal Mine

In view of outburst elimination and working face gas overrun problem in close distance coal seams of Zhongling Coal Mine, based on coal seams and gas occurrence characteristics, we propose the technologies of reasonable choosing protective layer mining, reasonable layout of floor drainage, "Y" style ventilation, reasonable implementation of high-level drilling and the application of coal mining without pillar, which eventually forms the close distance outburst coal seams gas comprehensive management system of Zhongling Coal Mine. By the field application, residual gas content of coal seam and index of drill cuttings method, the test results show that the drainage effect and outburst elimination rate and regional validation outburst elimination rate achieves 100%.