水力冲孔在低透性煤层的理论与试验研究

Theoretical Research and Application of Hydraulic Flushing in Low Permeability of Coal Seam

对水力冲孔技术在某煤矿"三软"低透性煤层的应用进行了理论研究与现场试验。首先对高压水射流破煤理论进行了研究,对高压水射流破煤的各个过程分别进行了探讨,从理论上验证了水力冲孔的卸压增透作用;其次分析了水力冲孔的工艺流程;最后对水力冲孔前后校检率、瓦斯抽放效果、残余瓦斯含量、压力进行了对比验证,水力冲孔措施对于某矿的卸压增透效果明显,对于指导相似矿井的瓦斯抽采消突措施具有参考意义。

Research theoretical and analysis effect of hydraulic flushing used in the soft and low permeability of coal seam.First research theeoretical of hydraulic flushing destroy effect of coal,probe the streamline the thoughts of water jet, theoretically proved the pressure relief anti-reflection effect of hydraulic flushing; Briefly introduces the technological process of hydraulic flushing; Comparison validation the gas flow extraction, concentration, residual gas content, residual gas pressure of hydraulic flushing after and before,proved the hydraulic flushing measure results were obvious in the coal mine,and can prove pressure relief and gas drainage referential meaning to similar coal mine.