裂隙岩体渗流特性的各向异性试验研究  

Experimental Study on Flow Anisotropy Behavior Through Rock Fractures

作　　者：刘嘉夫[1] 齐昕[1] LIU Jiafu;QI Xin(School of Hydraulic Engineering,Chongqing Water Resources and Electric Engineering College,Chongqing 402160,China)

机构地区：[1]重庆水利电力职业技术学院水利工程学院

出　　处：《人民黄河》2019年第11期121-126,共6页Yellow River

摘　　要：针对裂隙试件,在考虑裂隙表面粗糙性的立方定理修正经验公式的基础上,采用分析岩石渗透系数的等效沟槽模型对粗糙裂隙的渗流进行分析,推导得到考虑曲折效应的裂隙渗流计算公式,并根据裂隙试件J1、J2及J3的数值计算结果确定渗流计算公式中的待定常数,然后采用裂隙试件J4、J5对渗流计算公式的准确性进行验证。将本文渗流计算公式得到的裂隙试件渗流结果与数值计算结果进行比较,结果表明:考虑曲折效应的裂隙渗流计算公式计算结果与数值计算结果基本一致,且两者的计算结果吻合较好,验证了裂隙渗流计算公式的准确性。Taking fractures specimens as research objects,based on modified cubic law taking into account the roughness of fracture surface,the new equation accounting for tortuosity effect for calculating the flow volumetric rate through fractures was deduced by applying the equiva lent channel model which was adopted to analyze the permeability of rock.The two constants A and B in the new equation were obtained by fitting the numerical simulation results of joint specimen J1,J2 and J3.Then the flow rates of fractures specimen J4 and J5 derived from the new equation and numerical simulations were compared with each other to validate the new equation,which shows that the results obtained by the new equation agree well with numerical simulations,thus verifying the validity of the new equation.

关 键 词：裂隙 曲折效应 渗流 REYNOLDS方程 岩石力学 

分 类 号：O35[理学—流体力学] TV223.6[理学—力学]