基于AE的花岗岩三维裂隙连通逾渗模型研究  

Study on 3D Fracture Connected Percolation Model of Granite Based on AE

作　　者：杨晓杰[1,2] 张慧[1,2] 卢梦仟 陶志刚[1,2] YANG Xiaojie;ZHANG Hui;LU Mengqian;TAO Zhigang(State Key Laboratory of Deep Geotechnical Mechanics and Underground Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Mechanics and Architectural Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]中国矿业大学(北京)地球与测绘工程学院,北京100083

出　　处：《煤炭技术》2023年第8期8-11,共4页Coal Technology

基　　金：国家自然科学基金面上项目(52074295);越崎学者专项资金资助(800015Z11A07);中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室开放基金课题(SKLGDUEK202217)。

摘　　要：深部开采面临着错综复杂的环境和技术难题,探究北山深部花岗岩的破坏过程,通常使用的传统意义的声发射描述因数据分布的过于杂乱而导致辨识难度增加且无法精确地探知其内部关联。通过建立三维裂隙连通逾渗模型,能够实现裂隙的可视化精确描述。结果表明:以声发射能量数为损伤变量,采用ANSYS建立出考虑损伤的模型,并植入FLAC3D数值模拟软件中,模拟出花岗岩三轴条件下的全过程破坏情况,将破坏过程分为4个阶段:裂隙闭合阶段,线弹性变形阶段,裂隙萌生发育阶段,残余应力阶段。不同围压情况下的峰值应力与实验相统一,证明了损伤模型的有效性,为未来的岩石破坏研究提供参考。In order to investigate the damage process of granite in deep underground construction,the traditional acoustic emission description is usually used because the data distribution is too heterogeneous,which makes the identification difficult and the internal correlation cannot be accurately detected.By establishing a three-dimensional fracture connectivity model,the fractures can be visualized and accurately describe.The damage model consider-ing the acoustic emission energy number as the damage variable is established by ANSYS and implanted in FLAC3D numerical simulation software to simulate the whole process of granite damage under triaxial conditions.The peak stresses under different surrounding pressure cases are unified with the experiment,which proves the validity of the damage model and provides a reference for future rock damage studies.

关 键 词：声发射 三轴压缩 断裂损伤 逾渗 

分 类 号：TU45[建筑科学—岩土工程]