矿业科学学报2025，Vol.10Issue(2)：203-213,11.DOI:10.19606/j.cnki.jmst.2024920
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
摘要
Abstract
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Key words
fissure dip/acoustic emission/damage modes/mechanical behavior分类
矿山工程引用本文复制引用
赵乾百,杨天鸿,张兵,赵永,滕龙,杜时贵..不同裂隙倾角下岩石破坏模式及声发射特征[J].矿业科学学报,2025,10(2):203-213,11.基金项目
国家自然科学基金(52374157) （52374157）
中国科协青年人才托举工程(2023QNRC001) （2023QNRC001）
中央高校基本科研业务费(2023GFYD17) （2023GFYD17）
