Research and Practice on Standardized Drainage of Bedding Drilling Borehole in Yangquan Mining Area

In Yangquan Mining Area, there are perennial problems in the process of gas pre-extraction of bedding drilling borehole such as low drilling extraction concentration, small extraction volume and low extraction efficiency. In order to solve the problem of poor gas drainage effect in the coal seam, Yangmei Group has carried out the research and practice on the standardization system of drainage of bedding drilling borehole in outburst coal seam. Through a series of research and optimization on standardization of extraction process, such as drilling design, drilling construction, drilling inspection, drilling and sealing, drilling connection, drilling measurement, etc., the highly efficiency in gas extraction in the coal seam is realized, and the extraction time of the working face is shortened effectively. It is of great significance to mine pumping, digging, mining balance and safe production.