Analysis of three sides channel to release in pulling gas

This paper exams that how to select a method in gas drainage in coal mining face, when there is a difficulty in return road construction or on the process of connecting the mine road in work-face making an open-off cut, it can utilize the third road nearby work-face (belt roads, railroads and pedestrian roads, air return tunnel, etc) to adopt making a hole into the exploited empty area, and then making the gas in the exploited empty area flow into the third tunnel, forming a three-side tunnel to drainage gas. It can solve the above mentioned problems effectively. And simultaneously it proposes a warranty whether it can achieve anticipated effect for transportation tunnel construction.