岩石结构面注浆前后抗剪特性数值分析  

Numerical analysis for the shear characteristics of structure plane at pre-and-post grouting

作　　者：吴乐文[1] 赵奎[2] 

机构地区：[1]广西华锡集团股份有限公司,广西柳州545006 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2014年第4期96-100,共5页Nonferrous Metals Science and Engineering

基　　金：国家重点基础研究发展计划资助项目(2011cb411913);科技部"十一五"科技支撑计划(2008BAB32B03);江西省教育厅青年科学基金资助项目(GJJ11137;GJJ12361)

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 FLAC3 D 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 stepshaped 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.

关 键 词：数值模拟 注浆 结构面 剪切强度 

分 类 号：TD315[矿业工程—矿井建设]