气相压裂技术在低透气性煤层巷道瓦斯治理中的应用  

Application of Gas Fracturing Technology in Gas Control of Low Permeability Coal Seam Roadways

作　　者：张晓峰 ZHANG Xiaofeng(Shanxi Coal International Energy Group Co.,Ltd.,Taiyuan 030006,Shanxi,China)

机构地区：[1]山煤国际能源集团股份有限公司,山西太原030006

出　　处：《能源与节能》2025年第2期132-134,共3页Energy and Energy Conservation

摘　　要：A矿M8煤层为低透气性煤层,瓦斯抽采难度大。该矿11084回风巷掘进过程中连抽30 d未达标。针对这一问题,采用CO_(2)致裂技术致裂后进行连抽。数值模拟研究表明,M8煤层CO_(2)致裂半径约为5 m。制定了11084回风巷致裂技术措施,并在实施后进行了连抽,连抽7 d后进行K_(1)值、残余瓦斯含量考察。考察结果显示,区域内K_(1)值均小于0.5 mL/(g·min^(1/2)),残余瓦斯含量均小于8 m^(3)/t,增透效果显著。研究成果及方法对于其他低透气性突出煤矿掘进巷道瓦斯治理具有一定的借鉴意义。The M8 coal seam in A Mine is a low permeability coal seam,making gas extraction difficult.During the excavation process of the 11084 return airway in the mine,continuous pumping for 30 d did not meet the standard.In response to this issue CO_(2) fracturing technology was adopted for continuous pumping after fracturing.Numerical simulation studies show that the CO_(2) induced fracturing radius of M8 coal seam was about 5 m.The technical measures for cracking in the 11084 return airway were formulated,and continuous pumping was carried out after implementation.After 7 d of continuous pumping,the K_(1) value and residual gas content were investigated.The investigation results show that the K_(1) value in the area are all less than 0.5 mL/(g·min~(1/2))and the residual gas content is all less than 8m~3/t,indicating a significant anti-permeability effect.The research results and methods have certain reference significance for gas control in excavation tunnels of other low permeability outburst coal mines.

关 键 词：低透气性煤层 CO_(2)致裂 K_(1)值 残余瓦斯含量 数值模拟 

分 类 号：TD712.6[矿业工程—矿井通风与安全]