Study on "fracturing-sealing" integration technology based on high-energy gas fracturing in single seam with high gas and low air permeability

作     者：Zhang Chao Lin Baiquan Zhou Yan Zhai Cheng Zhu Chuanjie 

作者机构：School of Safety EngineeringChina University of Mining and Technology State Key Laboratory of Coal Resources and Mine Safety 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2013年第23卷第6期

页      面：841-846页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：financial support provided by the State Key Basic Research Program of China(No.2011CB201205) the National Natural Science Foundation of China(No.51074161) the National Science and Technology Support Program(No.2012BAK04B07) 

主　　题：Coal gas High-energy gas fracturing "Fracturing-sealing" integration Pressure relief and permeability increase Gas extraction 

摘      要：To improve the gas extraction efficiency of single seam with high gas and low air permeability,we developed thefracturing-sealingintegration technology,and carried out the engineering experiment in the3305 Tunliu *** the experiment,coal seams can achieve the aim of antireflection effect through the following process:First,project main cracks with the high energy pulse ***,break the coal body by delaying the propellant ***,destroy the dense structure of the hard coal body,and form loose slit rings around the ***,seal the boreholes with thestrong-weak-strongpressurized sealing *** results are as follows:The average concentration of gas extraction increases from8.3%to 39.5%.The average discharge of gas extraction increases from 0.02 to 0.10 m^3/*** tunneling speeds up from 49.5 to 130 m/*** the permeability of coal seams improves nearly *** the same conditions,the technology is much more efficient in depressurization and antireflection than common *** other words,it will provide a more effective way for the gas extraction of single seam with high gas and low air permeability.