A multi-area progressive grouping gas control protective layer method

A multi-area progressive grouping protective layer Gas Control method for a short distance under the conditions of high gas seam group, and for regional consumption projection projecting seam mining safety. The gas near the high occurrence characteristics projecting seam group, the group may be divided into an upper layer is coal seam group, the seam and seam group the group and the group as a key seam seam group protective layer, the lower seam and the seam groups as the protective groups are groups seam the seam groups layer, progressive multiple protective groups on the protected seam seam group and a lower layer. Mining sequence of three seam group: the group seam, the seam and a lower seam group group. Coal Mining respective top to bottom are the three packets. The use of roof and floor rock roadway drainage Borehole Gas Release of the protective layer, to achieve the purpose of drainage gas and a perspective projection eliminate dangerous area, the gas can be used comprise distance seam group of three or more seam governance. Its method is simple, short construction period, safety and efficiency, and low cost.