Experimental Investigation of Nonlinear Flow Characteristics of Real Rock Joints under Different Contact Conditions
Experimental Investigation of Nonlinear Flow Characteristics of Real Rock Joints under Different Contact Conditions
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DOI：
10.1061/(asce)hy.1943-7900.0001238
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发表时间：
2017-03
影响因子：
2.4
通讯作者：
C. Xia;Q. Xin;P. Lin;Wei-min Xiao;G. Yang
中科院分区：
文献类型：
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作者：
C. Xia;Q. Xin;P. Lin;Wei-min Xiao;G. Yang
通过对三个具有天然特征的人工岩石节理的室内实验，研究了不同接触条件下单个节理内流体的非线性流动特性。利用非接触式三维立体测量仪对岩石节理的三维表面形貌进行了测量。利用自编软件计算了不同接触条件下岩石节理的复合形态参数。实验结果表明，Forchheimer方程（重点讨论）和Izbash方程都能很好地描述单个接头中的非线性流体流动。Forchheimer定律的线性系数a和非线性系数B均呈下降趋势，且下降速度沿着偏移距离逐渐减小。线性系数a接近于零，系数n接近于零。
AbstractLaboratory experiments were conducted on three artificial rock joints with natural characteristics to study the nonlinear fluid flow characteristics in a single joint under different contact conditions. A noncontact, three-dimensional stereotopometric measurement instrument was used to measure the three-dimensional surface morphology of rock joints before they were tested. Subsequently, the composite morphology parameters of rock joints under different contact conditions were calculated by using self-programmed software. The experimental results showed that both the Forchheimer’s equation (emphatically discussed) and Izbash’s equation could provide an excellent description for the nonlinear fluid flow in a single joint. The linear coefficient a and nonlinear coefficient b of the Forchheimer’s law both generally decreased, and such rate of decrease was gradually reduced along with increasing offset distance. The value of linear coefficient a approached zero and the value of coefficient n was close ...