高低压循环水力压裂在李子垭煤矿瓦斯异常区域的应用  

Application of High and Low Pressure Cyclic Hydraulic Fracturing in Gas Anomaly Area of Liziya Coal Mine

作　　者：蒋志刚 成艳英[2] JIANG Zhi-gang;CHENG Yan-ying(College of Resources and Environmental Sciences,Chongqing University,Chongqing 400044,China;Technology Center,Sichuan Coal Industry Group Limited Liability Company,Chengdu 610091,China)

机构地区：[1]重庆大学资源及环境学院,重庆400044 [2]四川省煤炭产业集团有限责任公司技术中心,成都610091

出　　处：《煤炭技术》2020年第2期78-81,共4页Coal Technology

基　　金：四川省科技计划项目重点研发项目(2019YFS0483)。

摘　　要：研究高低压循环水压预裂技术治理区域性瓦斯,提出乳化液泵注水,交变压裂泵起裂,水压预裂的压力、时间、效果的评价方式等参数。通过在李子垭煤矿25032工作面的试验,观察记录高低压循环压裂孔抽放纯流量30 d,最高浓度达到89%,压裂影响区域抽放孔浓度最高达到70.2%;平均瓦斯纯流量为0.17 m^3/min,为普通抽放孔的1.7~3倍。The high and low pressure circulating water pressure pre-fracturing technology is studied to control the regional gas technology,and the parameters such as emulsion pump water injection,alternating fracturing pump initiation,hydraulic pre-fracturing pressure,time,effect evaluation method and so on are put forward.Through the test in 25032 working face of Liziya coal mine,the purge flow rate of high and low-pressure cyclic fracturing hole is observed and recorded for 30 days,the highest concentration is 89%,the highest concentration of drainage hole is 70.2%in the affected area of fracturing,and the average pure flow rate of gas is 0.17 m^3/min,between 3 and 1.7 times as much as the ordinary drainage hole.

关 键 词：水力压裂 封孔方式 瓦斯治理 高低压循环 

分 类 号：TD713[矿业工程—矿井通风与安全]