高瓦斯低透气性煤层深钻孔高压水力割缝增透技术

为提高新田煤矿M9煤层瓦斯抽采效果,解决低透气性突出煤层抽采效率低及应力主导型煤层卸压效果差的难题,以新田煤矿1901工作面为研究背景,分析了深钻孔超高压水力割缝卸压增透机理,采用深钻孔与高压水力割缝相结合增透技术,加快了1901掘进工作面抽采效率,减少了抽采达标时间,实现了1901掘进工作面 “安全、科学、精准、经济、高效”的瓦斯灾害防治,有利于煤矿安全高效生产和可持续健康发展。

Research and Application of High Gas and Low Research and Application of High Gas and Low Permeability Coal Seam Deep Drilling High Pressure Hydraulic Cutting Joint Penetration Technology

ultrashort hydraulic slit is an effective method to improve the permeability of coal seam. In response to the problem of gas control in Xintian coal mine in Guizhou mining area, low drilling concentration and fast flow attenuation, long coal seam gas management time and difficulty in management, can not effectively solve the problem of efficient gas extraction, which directly causes low gas extraction rate in the mine. "Pumping, mining, digging" ratio is out of balance. In order to improve the gas extraction effect of the M9 coal seam in Xintian Coal Mine, solve the difficult problem of low gas permeability and low coal seam extraction efficiency and poor stress relief effect, shorten the gas treatment time, improve the permeability of coal seams, and reduce the amount of drilling. The use of deep drilling and high-pressure hydraulic cutting technology to increase penetration in the 1901 working surface has accelerated the pumping efficiency of the 1901 excavation working surface, reduced the extraction time, and achieved the "safety, science, accuracy, economy, and efficiency" of the 1901 excavation working surface. Gas disaster prevention and control, To achieve safe and efficient production and sustainable and healthy development of coal mines.