岩石结构面注浆前后抗剪特性数值分析

摘要

岩石结构面力学特性研究一直是岩石力学的热点问题，为研究注浆前后岩石结构面力学特性，利用ANSYS建立了结构面剪切计算模型并导入FLAC3D进行计算，采用等效参数模拟方法对比分析了3种结构面类型在台阶高宽比为0.5和0.3下结构面的力学特性.结果表明：台阶宽高比不同台阶所表现的破坏规律不同，高宽比大时为剪断破坏，高宽比小时为压切破坏；注浆对提高结构面抗剪强度作用明显.最后，根据试验结果提出了非控制性爬坡角概念.%The researches on the mechanical property of rock structure plane has always been a hot topic .In order to study the mechanical property of rock mass at pre-and-post grouting, a FLAC3D calculation model is constructed based on ANSYS to perform calculation. The mechanical properties of three structural planes and two aspect ratio types are analyzed with aspect ratio are 0.5 and 0.3.The results show that the different step-shaped aspect ratios have the different failure laws, which exhibited shear failure with large aspect ratios and pressure-shear failure with small aspect ratios, and the shearing strength increased markedly after grouting . The concept of uncontrolled climbing angle is put forward according to the results .