基于不同试验方法的裂隙岩体渗透系数取值研究  

Study on the value of permeability coefficient of fractured rock body based on different test methods

作　　者：徐杰 黄勇[1] XU Jie;HUANG Yong(College of Earth Science and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100

出　　处：《甘肃科学学报》2024年第5期132-137,共6页Journal of Gansu Sciences

摘　　要：裂隙岩体渗透系数的确定方法有许多,每种方法都有其相应的特点和适用条件,因此选用合适的渗透系数对水利水电工程渗流分析至关重要。以泽雅水库泄放洞工程为例,在3个勘探孔中采用注水试验、压水试验和连通试验分别对渗透系数进行计算分析。结果显示,不同试验方法计算的渗透系数相差较大,可达到1~4个数量级,表明裂隙岩体具有强烈的非均质各向异性。各方法均适用于裂隙岩体的渗透系数计算,但针对实际工程,尺度越小则岩体非均质性越明显,采用连通试验结果较好;尺度越大则岩体均质性越好,选择注水试验和压水试验比较合适。研究结果可为渗流定量计算提供参考依据。There are many methods for determining the permeability coefficient of fractured rock bodies,and each method has its corresponding characteristics and applicable conditions,so the selection of an appropriate permeability coefficient is crucial for seepage analysis in water conservancy and hydropower projects.Taking Zeya reservoir spillway project as an example,the permeability coefficient was calculated in three exploration holes by using water injection test,water compression test and connectivity test,respectively.The results show that the permeability coefficients calculated by different test methods differ greatly by 1-4 orders of magnitude,indicating that the fractured rock body has a strong non-homogeneous anisotropy.Each method is suitable for calculating the permeability coefficient of fractured rock bodies,but for practical engineering,it is necessary to choose the appropriate test methods and permeability coefficient values according to the specific geological conditions and the size of the study scale to provide better guidance for specific projects.

关 键 词：裂隙岩体 渗透系数 注水试验 压水试验 连通试验 

分 类 号：P641[天文地球—地质矿产勘探]