摘要
为了解决矿井高构造应力区域瓦斯抽采效果差、钻孔垮孔严重、瓦斯抽采浓度低等问题,以赵家寨煤矿14201工作面为研究对象,在预抽煤层瓦斯时采用水力割缝增渗技术,分析了该技术的增透原理,并在14201工作面回风巷进行了对比试验。结果表明:水力割缝增渗技术明显比未割缝抽采技术的渗透性好,增渗区域瓦斯含量明显降低,提高了瓦斯抽采浓度和抽采效果。采用水力割缝工艺后,瓦斯抽采日纯量平均为130 m^(3)/min,是未割缝区域钻孔的瓦斯抽采纯量51.42 m^(3)/min的2.5倍,同时割缝抽采28 d后,瓦斯含量由8.91 m^(3)/t降低到5.74 m^(3)/t,达到了突出煤层消突的目的。
In order to solve the problems of poor gas drainage effect,serious borehole collapse and low gas drainage concentration in high tectonic stress areas of mines.Taking 14201 working face of Zhaojiazhai Coal Mine as the research object,the hydraulic slitting permeability enhancement technology is used in the pre-extraction of coal seam gas,and the principle of this technology is analyzed.The results show that compared with the unslit drainage technology,the hydraulic slitting technology can significantly increase the permeability of the coal seam,the gas content in the increased permeability area is obviously reduced,and the gas drainage concentration and drainage effect are improved.After the hydraulic slitting process is adopted,the daily scalar volume of gas drainage is 130 m^(3)/min,which is 2.5 times that of the 51.42 m^(3)/min gas drainage scalar in the unslotted area.It is reduced from 8.91 m^(3)/t to 5.74 m^(3)/t,achieving the purpose of eliminating outburst in outburst coal seam.
作者
耿延辉
GENG Yanhui(Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China;Chongqing Research Institute of China Coal Technology and Engineering Group,Chongqing 400037,China)
出处
《煤》
2023年第3期1-3,共3页
Coal
基金
国家重点研发计划项目(2017YFC0804206)。
关键词
松软低透煤层
瓦斯
超高压
压裂
割缝
soft and low permeability coal seam
gas
ultra-high pressure
fracturing
slitting
作者简介
耿延辉(1980-),男,河南鄢陵人,工程师,从事矿井瓦斯防治、工程项目管理等工作。
