关键词: 高瓦斯, 低透气性, 突出煤层, 深钻孔, 超高压水力割缝, 增透技术

Abstract: 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.