关键词: 高位钻孔, 横川闭墙埋管, 底抽巷闭墙埋管, 立体抽采

Abstract: Aiming at the current situation of gas control in Zhaozhuang coal mining face, through analysis of the gas source and emission law in the mining process of the face, combined with the actual design of the roadway layout of the face, the design and construction of high-level drilling and drainage technology, and the horizontal closed wall buried pipe Drainage technology, increase the bottom-drainage tunnel closed-wall buried pipe drainage technology, and conduct targeted and accurate drainage of gas accumulated in the cracked zone of the roof, gas accumulated in the collapse zone, and upwelling gas in the lower adjacent layer. Through further analysis, the changes in the concentration and scalar amount of the three sub-source combined three-dimensional drainage technologies in the mining process of the working face were obtained, and the main functions of the three drainage technologies in gas control were verified, and three types of drainage were given. The optimal mixing volume of extraction technology. Through the use of the new split-source combined three-dimensional extraction mode, the upper corner of the high-yield working face of the soft coal seam with a daily output of 10,000 tons under the U-shaped ventilation mode and the maximum gas concentration of the return airway are below 0.7%, which ensures the safe mining of the working face.