Study on Gas Drainage Technology of Opening Closed Roadway

In order to ensure the safe and rapid emission of high concentration gas when the mine opens the closed roadway, the gas emission method of the measure hole on the closed wall of the roadway and the extraction hole through the head of the roadway are studied. It solved the problems of difficult control of air volume, long gas emission time, easy overrun of return air flow gas concentration and large influence range in closed roadway gas emission. The practical results show that after the closed wall of -580 m track stone gate roadway is opened, the gas concentration in the airflow is 0.18 %, and the gas emission time is 2 min, which greatly shortens the gas emission time. There is no abnormal phenomenon in the segmented gas emission, and the safe gas emission is realized