煤矿安全2017，Vol.48Issue(10)：76-79,4.DOI:10.13347/j.cnki.mkaq.2017.10.020
深部低透气性煤层水力压裂强化增透技术研究
Study on Intensified Permeability Improving Technology by Hydraulic Fracturing in Deep and Low Permeability Coal Seam
摘要
Abstract
In this paper,the combination of numerical simulation and field engineering test is used to systematically study the effect of hydraulic fracturing technology on bottom drainage roadway in the coal seam.In the process of hydraulic fracturing,the law of fracture development,the redistribution of stress and the change of permeability coefficient are obtained,the range of permeability improving in coal seam is obtained,and engineering tests are used to verify the results of numerical simulation.The numerical simulation results are applied in engineering practice,high efficiency extraction of coal seam gas is realized.In the first month after fracturing,the average gas drainage of the single hole is more than 3.6 times of the non-fracturing zone,the pumping time is shortened by more than 40％,all these realize the long time permeability improving and the gas efficient extraction of the coal seam.关键词
煤层/水力压裂/强化增透/数值模拟/工程试验Key words
coal seam/hydraulic fracture/intensified permeability improving/numerical simulation/engineering test分类
矿业与冶金引用本文复制引用
焦先军,蔡峰..深部低透气性煤层水力压裂强化增透技术研究[J].煤矿安全,2017,48(10):76-79,4.基金项目
国家自然科学基金资助项目(51304006) （51304006）
国家科技重大专项资助项目(2011ZX05064) （2011ZX05064）
