摘要
为了研究瓦斯渗流过程中渗透率各向异性的情况,以唐山矿7~#煤层为例,分别测定了不同有效应力条件下,煤样走向、倾向和竖直方向的渗透率,得到了渗透率各向异性指数。结果表明:走向/竖直方向渗透率各向异性指数最大,有效应力小于6 MPa时,走向/倾向的渗透率各向异性指数大于倾向/竖直方向的渗透率各向异性指数;有效应力大于6 MPa以后,倾向/竖直方向的渗透率各向异性指数大于走向/倾向的渗透率各向异性指数,实验结论为瓦斯抽放钻孔的布置提供了参考。
In order to study the law of anisotropic permeability of coal containing gas, the coal permeability along its strike, inclination and vertical direction under the conditions of different effective stresses were carried out with coal samples from 7~# coal seam in Tangshan mine, the anisotropic permeability exponent was obtained. The results show that the anisotropic permeability exponent of strike/vertical direction is the biggest, when the effective stress is less than 6 MPa, the anisotropic permeability exponent of strike/inclination is bigger than which of inclination/vertical direction, the anisotropic permeability exponent of inclination/vertical direction is bigger than which of strike/inclination direction after 6 MPa. The results of the work provide a theoretical guidance for coal-bed methane extraction.
作者
安坤尧
杨云杰
柳晓莉
AN Kun-yao;YANG Yun-jie;LIU Xiao-li(College of Mining Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China)
出处
《华北理工大学学报(自然科学版)》
CAS
2020年第4期30-33,60,共5页
Journal of North China University of Science and Technology:Natural Science Edition
基金
河北省科技计划项目(16275516),大学生创新创业训练计划资助项目(X2018247)。
关键词
含瓦斯煤
渗透率
各向异性
应力敏感性
coal containing gas
permeability
anisotropy
stress sensitivity