岩石节理剪切流变特性及其与节理表面形貌参数关联性研究

项目名称： 岩石节理剪切流变特性及其与节理表面形貌参数关联性研究

项目编号： No.51274249

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 曹平

作者单位： 中南大学

项目金额： 70万元

中文摘要： 本项目以岩石节理剪切流变试验为基础，从试验、理论分析、数值建模多角度分析节理的剪切流变性质，主要研究节理剪切流变的粘弹塑性本构方程，充填物厚度与成分对节理剪切流变性质的影响规律，负指数剪切强度模型与弹塑性本构模型方程关系，节理剪切流变时间效应，以及用分形维数、JRC定量描述节理表面的粗糙度，着重研究节理表面粗糙度对节理剪切流变性质的影响，分析粗糙度参数在剪切流变试验下的变化，最后建立考虑粗糙度参数的节理剪切流变本构模型、节理长期抗剪强度的预测模型，并用数值分析软件建立节理剪切流变的数值模型，拟合节理剪切流变特性曲线。该课题的研究成果对进一步认识节理的剪切流变性质和长期抗剪强度有较大的理论与实际意义。

中文关键词： 岩石节理；节理剪切；流变；粗糙度系数；数值模拟

英文摘要： Based on the tests of rock joints shear rheology, in this project the shear rheological characteristics of joints will be analyzed from many methods, such as tests, theoretical analysis and numerical modeling. The main substances of the project range over establishing the elastic-plastic constructive equation of rock joints shear rheology, influence rules of the thickness and compositions of joint fillings on the shear rheological characteristics of joints, the relationship between negative exponential shear strength model and the elastic-plastic constructive equation, the joint shear rheological time effect and using the fractal dimension and the JRC to descript the joints surfaces roughness. The influence of joint wall roughness on the shear rheological characteristics of joints will be emphasized and its variation in the shear tests will be studied, in order to set up the predictive constitutive model for long-term shear strength and the rock joints shear rheology constitutive model considering the roughness coefficient. The numerical model will be built by numerical analysis software for fitting the shear rheological characteristic curves of rock joints. The research achievement of this project will bring meaningful theoretical and practical influences on the knowledge of joint shear rheological characterist

英文关键词： rock joint；joint shearing；rheology；roughness coefficient；numerical simulation