超前预抽、边掘边抽在掘进中的应用

摘要

超前预抽、边掘边抽是在巷道掘进的同时,对掌子面煤壁以里膨胀裂隙深度范围内和巷道周围卸压煤体内的瓦斯进行抽放.该技术的应用,可有效解决巷道掘进过程中的瓦斯异常涌出问题,确保安全生产.%the advance beforehand, while drawing-off and smoke extraction roadway excavation is in the same time, to influence of coal in the wall to expand fissure depth within the scope and roadway surrounding roof-floor coal body of gas during drainage. The application of the technology can effectively solve the roadway excavation in the process of abnormal gas emission problems, ensure the safety in production.