低渗透性煤层增透技术试验研究

Experimental Study on Permeability Increasing Technology in Low Permeability Coal Seam

为解决矿井煤层透气性差、瓦斯预抽困难的问题,提出了引进增透技术强化抽采的方法。同时将CO_(2)预裂和深孔爆破预裂引入到绿塘煤矿南二采区S204工作面,通过考察分析,两种增透方式均能有效改善煤层透气性,提高瓦斯抽采效率,但CO_(2)预裂增透效果更加显著,有效影响半径也远大于深孔爆破预裂,可以将CO_(2)预裂增透技术推广运用到矿井其它采掘工作面。

In order to solve the problems of poor permeability of coal seam and difficult gas pre drainage,the method of introducing permeability increasing technology to strengthen gas drainage is proposed.At the same time,CO_(2)pre-splitting and deep-hole blasting pre-splitting are introduced into the working face S204 in the second mining area of Lutang Coal Mine,through investigation and analysis,the two methods can effectively improve coal seam permeability and gas drainage efficiency,however,the effect of CO_(2)presplitting is more significant,and the effective radius is far greater than that of deep hole blasting presplitting.Therefore,CO_(2)presplitting technology can be applied to other mining faces.