Coal Roadway Driving Technology in Low Permeability Coal Seam Based on Short Hole Rapid Drainage

Aiming at the problems of poor permeability of coal seam, fast attenuation of gas flow in boreholes, poor effect of long boreholes in advance and slow driving speed of coal roadway, a new idea is proposed that short boreholes should be used for rapid centralized mining in front of coal roadway in overhaul shift time, and small-scale gas should be extracted in short time and high strength to reduce ventilation pressure and improve driving speed of coal roadway. Through the application of 3605 return air roadway in Huoerxinhe Coal Mine, it is shown that under the premise of 20% reduction of return air flow and gas concentration in working face, the monthly advance footage of working face is increased by 50%. The effective control of gas in low permeability coal seam roadway is realized.