水力造穴增透技术在常村煤矿的应用研究

Application of hydraulic cavitation and anti-reflection technology in Changcun Mine

为解决常村煤矿3号煤层瓦斯含量高、透气性差、抽采效率低的难题,采取有效的增透措施来提高抽采效果。本文通过确定钻孔参数和布置方式,选择在2302工作面辅助回风巷进行了水力造穴试验。现场实践结果表明,水力造穴钻孔的抽采浓度是未造穴钻孔的5.8倍,瓦斯累计抽采总量提高9.0倍,水力造穴技术很大程度的改善了煤层透气性,有效提高了瓦斯抽采和巷道掘进效率,取得了显著成效。

In order to solve the problems of high gas content,poor gas permeability,and low drainage efficiency in the No.3 coal seam of the main mining of Changcun Mine,effective anti-permeability measures were adopted to improve the drainage effect.In this paper,by determining the drilling parameters and layout methods,a hydraulic cavitation test was conducted in the auxiliary air return roadway of the 2302 working face.Field practice results showed that the drainage concentration of hydraulic cavitation drilling was 5.8 times that of non-cavitation drilling,and the total cumulative gas extraction was increased by 9.0 times.Hydraulic cavitation technology greatly improved the permeability of coal seams,with obvious effect.