摘要
为研究高能气体冲击增透技术在不同应力波参数下对裂纹扩展规律影响,提高低渗透煤层瓦斯抽采效率,运用RFPA2D-dynamic数值计算,建立单孔增透模型。从裂纹扩展过程、应力波传播规律、增透孔周围应力分布和统计裂纹数量等方面来分析不同应力波载荷峰值和不同应力波载荷速率下的单孔增透裂纹扩展规律,在增透工艺设计中选取合适的载荷参数具有一定理论研究意义。
To study the effect of different stress wave parameters on crack propagation law of high energy gas permeability enhancement technology,improve the gas extraction efficiency of low permeability coal seams,RFPA2 D-dynamic numerical calculation is used and single hole permeability enhancement model is established.From the crack propagation process,the stress wave propagation rules,stress distribution around the enhancement hole and counting crack numbers,the crackpropagation laws of the single hole permeability enhancement under different stress wave load peaks and load rates are analyzed.Selecting appropriate load parameters in the design of permeability enhancement process has certain theoretical significance.
作者
王文才
王政
李金刚
梁素钰
WANG Wencai;WANG Zheng;LI Jingang;LIANG Suyu(Mining Research Institute,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《煤矿安全》
CAS
北大核心
2019年第8期153-157,共5页
Safety in Coal Mines
关键词
冲击增透
低渗透煤层
抽采效率
裂纹扩展
载荷参数
impact permeability enhancement
low permeability coal seam
extraction efficiency
crack propagation
load parameter
