Application Prospect Analysis on Gas Drainage Technology of Surface Well in Mining Area

According to the soft, low permeability and difficult gas drainage problems of the seam in China, a surface gas well drainage technology was provided to drain the desorbed gas from the seam and the gas in the mining disturbed area emitted from the coal mining face with a full utilization of the seam mining and pressure released effect. A deep analysis was conducted on the technology applied to the mine gas control from the resources evaluation, gas well design, surface gas well layo ut, local protection, safety gas drainage control and other key technology of the surface gas well drainage technology in the mining disturbed area of the mine, applicati on effect of the completed technology, development prospects and other aspects. The paper pointed out that the surface gas well drainage technology in the mining dist urbed area of the mine would be an effective access to the comprehensive gas disaster control in the mining area. The rational proposals of a scale develop the coalbe d methane in the mining area and to effectively control the gas disasters in the underground mine was provided. The layout of surface gas wells should be partial to the air retuning gateway side of the coal mining face and the gas well structure should fully play the role of the cracking zone of the coal mining face.