Gas Drainage Effect Analysis of the First Mining Face in Huoerxinhe Mine

Based on the drilling arrangement (unilateral and bilateral arrangement) and extraction time and, the first mining face of Huoerxinhe Mine was divided into two assessment units, and the gas pre-drainage process, pre-drainage effect, evaluation indicators and evaluation results of two units were analyzed. According to the evaluation results of pre-drainage effect, combined with mine outburst law and the actual situation of "pumping, driving, mining" deployment, the problems of drilling gas pre-drainage work in this mining face were analyzed, and the solutions were proposed.