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水力冲孔是低透气性煤层普遍采用的卸压增透措施,合理确定钻孔的冲孔煤量,能够有效保证冲孔区域的瓦斯抽采浓度,加快瓦斯抽采达标速度。针对现场应用水力冲孔增透措施后瓦斯抽采方面存在的问题及对煤巷掘进产生的影响进行分析,探讨了水力冲孔增透合理冲孔煤量的确定方法,进一步指导低透气性煤层瓦斯治理工作。
Hydraulic punching is widely used in low-permeability coal seam pressure-relief and permeation measures to properly determine the amount of drilling coal perforation, which can effectively guarantee the concentration of gas drainage in the punching area and speed up the rate of gas pumping compliance. In view of the problems existing in gas drainage after hydraulic penetration enhancement measures on the site and the influence on coal roadway driving, the method to determine the reasonable amount of pierced coal by hydraulic punching is discussed to further guide the low permeability coal seam Gas management work.