Engineering Practice of a Kilometer Shaft Uncovering Very Thick Outburst Coal Seam in Mining Area of Henan Province

In the process of excavating a kilometer shaft, uncovering outburst coal seam is the greatest risk, highest cost, longest processes. According to Coal and Gas Outburst Prevention Provisionsand engineering geology conditions, the engineering practice of a kilometer shaft uncovering very thick outburst coal seam in No.3 coal mine of Hebi coal industry group company is safely and smoothly completed.