岩石粗糙裂隙渗流试验模型研究  

Research on Seepage Test Model of Rough Rock Fracture

作　　者：陈辉辉 高悦 郭凤娟 王亚芹 CHEN Hui-hui;GAO Yue;GUO Feng-juan;WANG Ya-qin(Department of Hydraulic Engineering,Hebei University of Water Resources and Electric Engineering,Cangzhou 061001,China)

机构地区：[1]河北水利电力学院水利工程系,河北沧州061001

出　　处：《水电能源科学》2023年第1期137-141,共5页Water Resources and Power

基　　金：河北省岩土工程安全与变形控制重点实验室、河北水利电力学院基本科研业务费项目(SYKY2014)。

摘　　要：分析岩石裂隙渗流对评价岩体工程安全性有重要意义。通过三维结构光学扫描仪扫描岩石裂隙表面测得三维坐标点并可视化重构,采用节理粗糙度系数和形貌统计等参数定量描述岩石裂隙粗糙程度和起伏特征。试验研究发现,当增大渗透压力梯度时,岩石裂隙渗流将由线性渗流转变为非线性渗流,采用Forchheimer公式能较好拟合这一过程。引入非线性因子E,求得临界非线性流的阈值和雷诺数。引入动量相对损失量—欧拉数来描述裂隙渗流过程中的流体能量演化规律,发现欧拉数呈先急速下降后逐渐趋于稳定的趋势。研究成果对实际工程具有一定指导意义。Analysis of rock fracture seepage plays an important role in evaluation of rock engineering safety. The three-dimensional coordinate points of the rock fracture surface were scanned by a three-dimensional structure optical scanner and visually reconstructed. Parameters such as joint roughness coefficient JRC and topography statistics were used to quantitatively describe the roughness and undulation characteristics of rock fractures. Through experimental research, it is found that when the seepage pressure gradient increases, the seepage in rock fractures will change from linear seepage to non-linear seepage, and the Forchheimer formula can better fit this process. The threshold and Reynolds number of the critical Darcy flow were obtained by introducing he nonlinear factor E. The relative loss of momentum-Euler number was introduced to study the law of fluid energy evolution in the process of fracture seepage. It is found that the Euler number shows a trend that first drops rapidly and then gradually stabilizes. The result has certain guiding significance for actual engineering.

关 键 词：裂隙渗流 三维形貌 非线性流 临界雷诺数 欧拉数 

分 类 号：TV139.1[水利工程—水力学及河流动力学] TD313[矿业工程—矿井建设]