黑龙江科技大学学报2026，Vol.36Issue(5)：736-743,8.DOI:10.3969/j.issn.2095-7262.2026.05.006
不同形状缺陷岩石的分级加载蠕变失稳规律
Creep instability laws of rock with different shaped defects by graded loading
摘要
Abstract
This paper intends to reveal the influence laws of different defect shapes on rock creep in-stability behavior.The study investigates the creep mechanical properties and acoustic emission evolution patterns of rocks containing various defect shape by a combined approach of graded loading creep testing and acoustic emission monitoring.The results indicate that the defect shape significantly influences rock creep deformation and instability behavior.Under identical loading conditions,rocks with rectangular de-fects exhibit the maximum of instantaneous strain,creep strain,steady state creep rate,and energy dissi-pation,with the earliest accelerated creep stage and the shortest instability time.The rock with circular defects exhibits the smallest creep deformation and energy dissipation,with the most gradual failure process;and the rock with semicircular defects shows intermediate characteristics.During the accelerated creep stage,the rock with rectangular defects exhibits significantly higher ringing counts and acoustic e-mission energy than other defect shapes.The study indicates that the rock with rectangular defects exhib-its the highest tendency toward failure,the rock with circular defects shows the lowest instability,and the rock with semicircular defects has an intermediate instability tendency.关键词
缺陷岩石/分级加载/蠕变力学特性/声发射特征/蠕变失稳Key words
defective rock/graded loading/creep mechanical properties/acoustic emission charac-teristics/creep instability分类
矿业与冶金引用本文复制引用
肖福坤,秦龙飞,单磊..不同形状缺陷岩石的分级加载蠕变失稳规律[J].黑龙江科技大学学报,2026,36(5):736-743,8.基金项目
国家自然科学基金项目(52174075) （52174075）
