含单一弱层岩石单轴压缩蠕变破裂演化规律  

Creep rupture evolution of rock with single weak layer under uniaxial compression

作　　者：赵娜[1] 张怡斌 王来贵[1] 张亦海 ZHAO Na;ZHANG Yibin;WANG Laigui;ZHANG Yihai(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China;China Academy of Safety Science and Technology,Beijing 100012,China;Cathay Safety Technology Company Limited,Beijing 100012,China)

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]中国安全生产科学研究院,北京100012 [3]中安国泰(北京)科技发展有限公司,北京100012

出　　处：《辽宁工程技术大学学报（自然科学版）》2022年第6期526-532,共7页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点研发计划项目(2017YFC1503102);辽宁省重点科技创新基地联合开放基金(2020-KF-13-06);辽宁省教育厅科研项目(LJ2020JCL013)

摘　　要：为探究不同工况下含软弱夹层岩石的蠕变破裂演化规律,基于连续-非连续单元方法(CDEM),采用理论分析和数值模拟方法研究恒载作用下含软弱夹层岩石的蠕变破裂演化规律,模拟了不同倾角、不同厚度及不同弱层力学特性的含弱层岩石蠕变演化全过程.研究结果表明:岩体蠕变受控于软弱夹层倾角的影响,随着弱层倾角的增加,岩石蠕变速率越快,进入加速蠕变阶段的时间越短;相同倾角时,弱层厚度越大,蠕变速率越慢,蠕变破坏时轴向应变也越小;含软弱夹层岩石的蠕变速率与软弱夹层的弹性模量大小成反比,软弱夹层材料弹性模量越小,岩体总体强度越小,岩石蠕变速率越快.In order to explore the creep rupture evolution law of rocks with weak interlayers under different working conditions,based on the continuous-discontinuous element method(CDEM),the creep rupture evolution law of rocks with weak interlayers under constant load was studied by theoretical analysis and numerical simulation.The creep evolution process of rocks with weak interlayers with different dip angles,different thickness and different mechanical properties of weak interlayers was simulated.The results show that the rock mass creep is controlled by the dip angle of the weak interlayer.With the increase of the dip angle of the weak interlayer,the faster the rock creep rate,the shorter the time to enter the accelerated creep stage.For the same dip angle,the larger the thickness of the weak layer,the slower the creep rate and the smaller the axial strain during creep failure.The creep rate of rock containing soft interlayer is inversely proportional to the elastic modulus of soft interlayer.The smaller the elastic modulus of soft interlayer material,the smaller the overall strength of rock mass,and the faster the creep rate of rock.

关 键 词：软弱夹层 蠕变 连续-非连续单元法 数值模拟 

分 类 号：TU45[建筑科学—岩土工程]