煤矿安全2019，Vol.50Issue(7)：26-30,5.DOI:10.13347/j.cnki.mkaq.2019.07.007
水力压裂控制坚硬顶板室内试验及现场测试
Lab Experiment and Field Test of Hydraulic Fracturing in Controlling Hard Roof
摘要
Abstract
To obtain the crack growth law of hard roof under hydraulic fracturing, laboratory experiments were used to study the fracturing effect under the effect of different prefabricated transverse grooving parameters and pump injection rate. The experiments result shows: prefabricated transverse grooving can effectively reduce the initiation pressure, and longer grooving length and appropriate grooving angle may result in a smoother reorientation path for hydraulic fracture, thus improving the near-wellbore complexity. Besides, field experiments are also conducted to test the influence range and treatment effect. The result of field experiments shows: the propagation of hydraulic fractures ranges from 30 m to 50 m and no obvious impact pressure occurs after treatment. The roof fragments can also drop freely with the advancing of working face, which shows that hydraulic fracturing can effectively control the hard roof.关键词
水力压裂/顶板控制/预制切槽/横向切槽参数/泵注速率Key words
hydraulic fracture/roof control/prefabricated grooving/transverse grooving parameters/pump injection rate分类
矿业与冶金引用本文复制引用
段宏飞,杨强..水力压裂控制坚硬顶板室内试验及现场测试[J].煤矿安全,2019,50(7):26-30,5.基金项目
大同市工业科技攻关计划资助项目(2016008) （2016008）
国家自然科学基金资助项目(51279086) （51279086）
