李树刚,钱鸣高,石平五
LI Shu gang 1;QIAN Ming gao 2;SHI Ping wu 1 (1.Xi′an University of Science Technology;

• 1:西安科技学院!陕西西安710054
• 2:中国矿业大学!江苏徐州221008
• 3:西安科技学院!陕西西安710054

摘要(Abstract)：

借助现代化的电液伺服岩石力学试验系统 ,以数控瞬态渗透法进行了全应力应变过程的软煤样渗透特性试验。实验中首次设置了环向应变传感器 ,得出煤样渗透性与主应力差、轴应变、体积应变关系曲线 ,并拟合出相应方程。从中可知 ,煤样全应力应变过程对应的渗透系数是体积应变的双值函数 ,体积缩小时为 2次多项式 ,体积膨胀时为 5次多项式。该方程用在应力场—渗流场耦合的数值分析中 ,可使计算结果更符合工程实际
With the Electro hydraulic Servocontrolled Rock Mechanics Testing System,the permeability of soft coal sample related to complete stress strain path is experimented with instantaneous permeating method of data auto control.An annular strain sensor is set up firstly in testing,and the curves,reflecting the relationship between permeability of coal sample and principal stress difference,axial strain and volumetric strain,as well as the relevant equations are established.Thus it can be seen the coal sample permeability coefficient is twofold function of volumetric strain.It is binomial equation when the sample volume decreased,and five polynomial one when the volume increased.The equation can be applied to the numerical analysis of the coupled stress field and the fluid flow field,and the calculated results agree well with those observed.

关键词(KeyWords)： 全应力应变;渗透系数—应变方程;煤样渗透性;瓦斯运移
complete stress strain path;permeability strain equation;permeability of coal sample;gas delivery

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 李树刚,钱鸣高,石平五
LI Shu gang 1;QIAN Ming gao 2;SHI Ping wu 1 (1.Xi′an University of Science Technology;

参考文献(References)：

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