北京科技大学学报2012，Vol.34Issue(11)：1235-1239,5.
低透气性煤层井下分段点式水力压裂增透
Underground segmentation point hydraulic fracturing antireflection for low-permeability coal seams
摘要
Abstract
The principle and process of underground segmentation point hydraulic fracturing for low-permeability coal seams were studied by means of numerical analysis and field test.Underground segmentation hydraulic fracturing is intended to change the traditional force way to make coal more force and interaction,and finally to produce the effect of fracturing.The hydraulic fracturing test at the west second mining area of Chenshan Coal Mine in northeastern China shows that when the fractured radius is 5 to 7m,the critical injection pressure is 14 MPa,and it is suitable for the hydraulic fracturing that the injection pressure is 14 to 20 MPa.The test procedure is so simple that the hydraulic fracturing can be completed within 5 min,and the average gas flow and volume fraction of gas drainage are significantly increasing after the hydraulic fracturing.关键词
煤矿/开采/瓦斯/抽放/水力压裂/透气性Key words
coal mines/mining/coal gas/drainage/hydraulic fracturing/gas permeability分类
矿业与冶金引用本文复制引用
杨宏伟..低透气性煤层井下分段点式水力压裂增透[J].北京科技大学学报,2012,34(11):1235-1239,5.基金项目
“十一五”国家支撑计划资助项目 （）
