采矿与安全工程学报2011，Vol.28Issue(3)：452-455,4.
高压脉动水力压裂卸压增透技术及应用
Pressure Relief and Permeability-Increasing Technology Based on High Pressure Pulsating Hydraulic Fracturingand Its Application
摘要
Abstract
In order to improve the existing pressure relief and permeability increasing technologies, high pressure pulsating hydraulic fracturing technology was put forward on the basis of hydraulic fracturing to solve the current problems of regional gas control in coal mines. The propagation law of pulsating pressure in fractures and the effect of pressure relief and permeability-increasing were investigated by theoretical analysis and field test. The results show that the pulsating hydraulic fracturing can make some physical quantities of coal change repeatedly and produce fatigue failure, which in turn, dredges the pores and enhances the permeability. The effect of pressure relief reaches the best when the pulsating pressure is 24 Mpa and the frequency is 20 Hz. The extraction concentration increases by 264. 7% after fracturing while the gas flow increases by 245. 5%. The values and the change ranges of q and S which are outburst risk indexes reduce obviously. This technology can effectively enhance the affecting range of a single borehole and increase the extraction efficiency. It has a broad industrial application prospects.关键词
瓦斯抽采/卸压增透/脉动/水力压裂Key words
gas extraction/ pressure relief and permeability improvement/ pulsating/ hydraulic分类
矿业与冶金引用本文复制引用
林柏泉,李子文,翟成,比强,温永宇..高压脉动水力压裂卸压增透技术及应用[J].采矿与安全工程学报,2011,28(3):452-455,4.基金项目
国家重点基础研究发展计划资助(973)项目(2011CB201205) （973）
国家自然科学基金项目(51074161) （51074161）
煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM08x03) （SKLCRSM08x03）
