区域化结构与破裂耦合作用下的岩石破裂演化规律  

Evolution Law of Rock Fracture Under the Coupling Effect of Regionalized Structure and Fracture

作　　者：刘臻 姚旭龙 张艳博[1,2,3] 刘祥鑫 梁鹏[1,2,3] LIU Zhen;YAO Xulong;ZHANG Yanbo;LIU Xiangzin;LIANG Peng(College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei 063210,China;Hebei Provincial Key Laboratory of Mining Industry Development with Safe Technology Priority,Tangshan,Hebei 063210,China;Hebei Provincial Green Intelligent Mining Technology Innovation Center,Tangshan,Hebei 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山市063210 [2]河北省矿业开发与安全技术重点实验室,河北唐山市063210 [3]河北省矿山绿色智能开采技术创新中心,河北唐山市063210

出　　处：《矿业研究与开发》2023年第5期120-130,共11页Mining Research and Development

基　　金：国家自然科学基金项目(52074123);河北省自然科学基金项目(E2021209148)。

摘　　要：单轴压缩过程中,岩石内部区域化结构的演化导致破裂,破裂同样与区域化结构互相作用。为研究二者耦合作用下岩石破裂的演化规律,通过声发射-声波成像技术获取岩石内部波速数据,将其与颗粒流程序导出的颗粒信息自动匹配成组,针对加载过程中区域化结构的动态演化行为,进行模型优化,对区域化结构与破裂耦合作用下的岩石破裂演化规律展开研究。结果表明:构建出的动态演化模型,其破裂形态与室内试验具有良好的相似性;在时间上,裂纹萌生于区域化结构退化演化阶段,在空间上,裂纹萌生于退化后的Ⅲ类区域化结构内部;当区域化结构强化演化时,裂纹多在边界处扩展,在力学属性较弱区域聚集成核,当区域化结构持续劣化演化时,裂纹汇集成裂纹带,并在靠近边界位置处向演化方向扩展。Under uniaxial compression,the evolution of regionalized structure in rock leads to fracture,and fracture also interacts with regionalized structure.In order to study the evolution law of rock fracture under the coupling effect of regionalized structure and fracture,the wave velocity data inside the rock was obtained by the acoustic emission-acoustic imaging monitoring,which was automatically matched with the particle information derived from the particle flow program.Model optimization was carried out for the dynamic evolution behavior of regionalized structure during the loading process,and the evolution law of rock fracture under the coupling effect of regionalized structure and fracture was studied.The results are concluded as follows.Firstly,the fracture morphology of the constructed dynamic evolution model has a good similarity with indoor tests.Secondly,in terms of time,cracks originate from the degradation and evolution stage of regionalized structure,while in terms of space,cracks originate from the interior of Class II regionalized structure after degradation.Thirdly,when the regionalized structure strengthens and evolves,cracks often propagate at the boundary and gather into nuclei in areas with weaker mechanical properties.When the regionalized structure continues to deteriorate and evolve,cracks converge into crack bands and expand towards the evolution direction near the boundary.

关 键 词：区域化结构 岩石破裂 损伤演化 颗粒流软件 数值模拟 

分 类 号：TD313.5[矿业工程—矿井建设]