煤矿安全2017，Vol.48Issue(10)：13-16,4.DOI:10.13347/j.cnki.mkaq.2017.10.004
高压电脉冲致裂试验及其在煤层气开采中的应用分析
Experimental Study of High-voltage Electrical Pulse on Fracturing Samples and Its Application on Coalbed Methane Exploitation
摘要
Abstract
In order to study the action characteristics of high-voltage electrical pulse (HVEP),an experimental system was developed and some concrete samples were made,the distribution and extension characteristics of cracks under non-stress were studied.Results show that HVEP has a positive influence on producing cracks in samples.After the action of HVEP,the crack network appears on the concrete samples,the number of main cracks is between 2 to 4,and the length is 25 cm to 32 cm.The cracks start from the hole of samples and the generative process of cracks can be divided into four stages,stress accumulation,slow development,rapid development and failure stage.The shoek wave produced by liquid-electric effect of HVEP has a major role on fracturing samples,and the water-wedge effect can also promote the coal fracturing.After the action of HVEP,the flow degree of methane is improved,so the technology can encourage the exploitation of coalbed methane.关键词
高压电脉冲/致裂作用/液电效应/煤层气开采/裂隙扩展Key words
high-voltage electrical pulse/fracturing action/liquid-electric effect/coalbed methane exploitation/cracks extension分类
矿业与冶金引用本文复制引用
卢红奇,邓增社,聂百胜,邓广哲..高压电脉冲致裂试验及其在煤层气开采中的应用分析[J].煤矿安全,2017,48(10):13-16,4.基金项目
国家自然科学基金资助项目(51374216) （51374216）
陕西省工业科技攻关资助项目(2016GY-176) （2016GY-176）
