低透气性煤层水力冲孔强化抽采优化技术

Extraction Technology of Hydraulic Punching in Low Permeability Coal Seam

通过在龙山矿25051下底抽巷采用低透气性煤层水力冲孔强化抽采优化技术,采用普通穿层钻孔和穿层水力钻孔组合布置设计,瓦斯抽采纯量的4~5倍,延长抽采孔寿命,从而提高了瓦斯抽采率,增大煤层渗透率,扩大钻孔抽采有效影响范围,提高煤层瓦斯抽采效率,缓解龙山煤矿抽、采、掘接替紧张局面,为低透气性煤层开采过程中的瓦斯治理提供技术支撑。

Through the adoption of low permeability technology together ,in 25051 under the mine drainag coal seam extraction punching hole gas extraction e as the research object,increase the permeability of coal seam,expanding the scope of the borehole extraction effective influence,improve the efficiency of coal seam gas extraction,ease the Longshan coal mine,gas drainage,dig to succeed in a tense situation, for the low permeability of coal seam gas control to provide technical support in the process of mining.