摘要
利用MTS815多功能岩石力学试验机对茅口灰岩进行一系列不同轴压和围压下的渗流试验.试验结果表明:茅口灰岩裂隙流与Darcy流存在一定差异,表现出非线性时变性即非Darcy流;随着应变的增加,岩石渗透率刚开始下降较快,后期下降较慢.采用Origin专业绘图软件对Darcy流与非Darcy流渗透率数据进行拟合分析发现,幂函数能够很好的拟合二者之间的关系,并提出了可靠又简便的茅口灰岩非Darcy流渗透率计算公式.
This paper conducts a series of seepage test under different axial pressure and confining pressure on MTS815 multifunctional rock mechanics testing machine. Results show that different from Darcy flow,Maokou limestone fissures flow exhibits the nonlinear time-varying,which means Maokou limestone fissures flow meet non-Darcy laws; with the increase of strain,rock permeability decreases rapidly at first,but falls slowly at last;the Origin professional drawing software is adopted to fitting Darcy flow and the non-Darcy flow permeability test data. The fitting analysis shows that the power function relationship can be a good fit between the two,thus this paper putts forward the reliable and convenient formulas for calculating non-Darcy flow permeability of Maokou limestone.
出处
《矿业工程研究》
2016年第3期1-7,共7页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51274097
51174088)
湖南省自然科学基金资助项目(2015JJ2067)
湖南省教育厅资助项目(13A020)
关键词
三轴应力
裂隙岩体
渗透率
水力学特性
triaxial stress
fractured rock
permeability
hydraulic property
