采动影响下层理裂隙煤体的瓦斯渗流特性研究  

Research on gas seepage characteristics of stratified fractured coal body under mining influence

作　　者：袁振春 YUAN Zhenchun(China Coal Resources Development Group Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]中煤资源发展集团有限公司,河南郑州450000

出　　处：《技术与市场》2024年第9期148-152,159,共6页Technology and Market

摘　　要：为研究工作面采动影响下煤体中瓦斯沿层理裂隙渗透的规律,通过采集工作面的原始煤样,根据达西定律,利用三轴流变实验系统对试样进行加卸载条件下的渗透试验,并对试验结果进行了现场验证。试验结果表明:加卸载过程,平行于层理方向瓦斯的渗透率始终大于垂直于层理方向;煤样卸载后渗透率有损失,平行于层理方向渗透率损失58.66%,垂直于层理方向渗透率损失82.27%。实践表明:回采工作面受采动影响区域煤体瓦斯渗透特性与试验结果高度吻合,回采工作面布置穿层钻孔更有利于瓦斯抽采。In order to study the permeability law of gas in the coal body along the bedding cracks under the influence of mining at the working face,original coal samples were collected from the working face.According to Darcy’s law,a three-axis rheological experimental system was used to conduct permeability tests on the samples under loading and unloading conditions,and the test results were verified on-site.The experimental results show that during the loading and unloading process,the permeability of gas parallel to the bedding direction is always greater than that perpendicular to the bedding direction.After unloading,the permeabil-ity of the coal sample decreases,with a loss of 58.66%in the direction parallel to the bedding plane and 82.27%in the direc-tion perpendicular to the bedding plane.Practice has shown that the gas permeability characteristics of the coal body in the affect-ed area of the mining face are highly consistent with the experimental results,and the arrangement of through-layer boreholes in the mining face is more conducive to gas extraction.

关 键 词：层理裂隙 瓦斯抽采 瓦斯渗流 采动影响 回采工作面 

分 类 号：TD712[矿业工程—矿井通风与安全]