裂隙岩体多结构多流态渗流模型与模拟  

Seepage Model and Simulation of Multi-structure and Multi-flow in Fractured Rock Mass

作　　者：王恩志[1] 张东 刘晓丽[1] 吴春璐 马前驰 王明阳 姚文理 WANG En-zhi;ZHANG Dong;LIU Xiao-li;WU Chun-lu;MA Qian-chi;WANG Ming-yang;YAO Wen-li(State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《地球科学与环境学报》2022年第6期894-902,共9页Journal of Earth Sciences and Environment

基　　金：国家自然科学基金重大项目(52090081);清华大学水沙科学与水利水电工程国家重点实验室自主项目(2022-KY-02)。

摘　　要：复杂裂隙系统多结构和多流态渗流一直是裂隙岩体渗流理论研究的难点问题。基于裂隙岩体渗透空间结构和渗流特性,按管状孔洞、面状裂缝、带状断层和块状岩体所构成的多结构渗透介质构建三维渗流数值方程,基于单一结构的线性渗流、非线性渗流、层流-过渡流-湍流统一流态公式,推导了多流态渗流方程,给出多结构多流态渗流模型的求解方法。通过管道流试验和三维裂隙网络渗流试验与数值模拟分析结果对比,探讨了模型的合理性与适用性,并探讨了大尺度岩体离散-连续组合渗流模型的实用性,为精细模拟裂隙岩体渗流问题提供了参考。Multi-structure and multi-regime flow in complex fractured system has always been a difficult problem in the study of fracture rock mass seepage theory.Based on the spatial structure and seepage characteristics of fractured rock mass,a three-dimensional seepage numerical equation was constructed according to the multi-structure medium composed of tubular pores,planar fractures,zonal faults,and massive rock mass.Focusing on the transition and evolution of linear flow,nonlinear flow,laminar flow-transition flow-turbulent flow in single structure,the multi-regime flow equation was derived,and numerical method of multi-structure and multi-regime seepage model was given.By comparing the results of pipeline flow test and three-dimensional fractured network seepage test with the numerical simulation analysis,the rationality and applicability of the model were discussed,and the practicability of large-scale discrete and continuous combined seepage model of rock mass was discussed,which provides a reference for fine simulation of fractured rock mass seepage problem.

关 键 词：裂隙岩体 管道流 混合流 非线性流 多结构 多流态 数学模型 模拟 

分 类 号：P641[天文地球—地质矿产勘探] TU457[天文地球—地质学]