不同裂隙倾角下岩石破坏模式及声发射特征  

Rock failure modes and acoustic emission characteristics under different fissure angles

作　　者：赵乾百 杨天鸿[1] 张兵 赵永[1] 滕龙 杜时贵 ZHAO Qianbai;YANG Tianhong;ZHANG Bing;ZHAO Yong;TENG Long;DU Shigui(School of Resources and Civil Engineering,Northeastern University,Shenyang Liaoning 110819,China;NFC Africa Mining Plg,Beijing 100055,China;Changsha Institute of Mining Research Co.,Ltd.,Changsha Hunan 410012,China;School of Civil Engineering and Geographical Environment,Ningbo University,Ningbo Zhejiang 315211,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]中色非洲矿业有限公司,北京100055 [3]长沙矿山研究院有限责任公司,湖南长沙410012 [4]宁波大学土木工程与地理环境学院,浙江宁波315211

出　　处：《矿业科学学报》2025年第2期203-213,共11页Journal of Mining Science and Technology

基　　金：国家自然科学基金(52374157);中国科协青年人才托举工程(2023QNRC001);中央高校基本科研业务费(2023GFYD17)。

摘　　要：为了准确识别不同裂隙倾角下岩石声发射特征以及破坏模式,基于离散元数值模拟方法,结合室内单轴压缩实验,构建不同裂隙倾角下非均质岩石的单轴压缩模型。结果表明:裂隙倾角越大,裂隙结构面对岩石试件的劣化效应越小;裂隙结构面尖端及宏观裂纹中心的损伤破裂程度更为严重。岩石试件内部以拉伸破坏为主,裂隙倾角较小时,裂隙结构面尖端的剪切裂纹扩展方向与裂隙倾角近似成90°,并不断向远端发展直至贯穿整个岩石试件;裂隙倾角较大时,裂隙结构尖端的剪切裂隙扩展方向与裂隙倾角近似平行。To accurately identify the acoustic emission characteristics and failure patterns of rocks with different fracture dip angles,a uniaxial compression model for heterogeneous rocks with varying fracture angles was developed using the discrete element method(DEM)simulation,combined with laboratory uniaxial compression experiments.Results show that smaller differences between the fissure inclination angle and the loading direction lead to less deterioration effect of the structural surface of fissure on the rock specimen.The damage rupture degree is relatively intense at the tip of the fissure structure surface and the center of the macro crack.The micro and macroscopic damage inside the rock specimen is mainly tensile damage.When the inclination angle of the fissure is small,the extension direction of the shear crack at the tip of the structural face of the fissure is approximately 90°from the fissure angles and continues to develop to the distal end until it runs through the whole rock specimen.When the in-clination angle of the fissure is larger,the extension direction of the shear crack at the tip of the fissure-structure is approximately parallel to the fissure angles.

关 键 词：裂隙倾角 声发射 破坏模式 力学行为 

分 类 号：TD313[矿业工程—矿井建设]