Abstract: In order to solve the hidden danger of gas in the mining process of the 2308 working face of the main coking coal mine, the theoretical calculation method was used to calculate the height of the fall zone and the fissure zone during mining, and combined with the microseismic monitoring technology to cover the rock during the mining Monitor and record the microseismic events to analyze the spatial position of the mining fracture zone, and then obtain the spatial position of the gas enrichment zone in the overlying strata. The study found that the height of the mining fracture zone obtained by the microseismic monitoring method is close to the theoretical calculation result, namely The height of mining fissure zone is about 38m, and the period of stepping pressure during working face mining is about 14m. Based on this, the high gas drainage borehole was designed and its drainage effect was tested. It was found that the gas drainage volume increased by 162% and the gas drainage volume fraction increased by 210%, indicating that the use of microseismic monitoring technology to detect gas enrichment the zone is reliable.