中国矿山工程

Applied as an advanced approach to control the noxious gas, like gas, pressure balanced ventilation technology was widely popularized in the 1990s. However, the adverse effects can not be neglected, because once the booster fans are powered off or malfunctioning, the concentration of the noxious gas in certain work-face would be raised up immediately and over the limit of gas in a short time. Through conscious analysis of the origin of gas and the air distribution of certain work-face, Xinzhou coal mine applied several effective approaches to solve the problem of controlling the noxious gas under the condition of none pressure balance ventilation. The approaches are as follows: full negative pressure drainage through the main mine fans; sealing off the opposite end and tail end of air bag; introducing the compressed air ejector; releasing the noxious gas in the nearby mined-out area by connecting the emission pipelines with the measure holes, observation holes, and drainage holes in nearby mined-out area and constructing actively the gas drainage system.