采空区高位钻场瓦斯抽放技术的应用

Application of gas drainage through high position drilling holes in the goaf

为解决凤凰山矿151304工作面回采期间回风巷、上隅角瓦斯大的问题,采用了高位钻场抽采采空区裂隙带瓦斯的治理措施,回风巷瓦斯浓度由实施措施前的0.82%降至措施后的0.3%,上隅角瓦斯浓度由实施措施前的0.9%有效降至措施后的0.32%,有效提高了工作面的回采进度,缓解了矿井的采掘衔接部署。

In order to solve gas concentration overrun of upper corner and return roadway of the 151304 working face during top coal caving in the mining face,measure of gas drainage through high position drilling holes from fissure zone in the goaf was adopted,which solved the difficulty of large quantity of gas emission during working face mining,reduced the gas concentration of return roadway from 0.82%to 0.3%before and after adopting the gas drainage measure and the gas concentration of upper corner from 0.9%to 0.32%before and after adopting the gas drainage measure,effectively increased the mining rate of working face,mitigated the mining convergence deployment of coal mine.