华东交通大学学报2025，Vol.42Issue(5)：38-48,11.
含交叉裂隙红砂岩能量耗散与声发射特征研究
Study on Energy Dissipation and Acoustic Emission Characteristics of Red Sandstone with Cross-Fractures
摘要
Abstract
The objective of this study is to investigate the mechanical behavior,energy dissipation characteris-tics,and acoustic emission(AE)signal features of rocks with cross-fractures during loading.Rock specimens with varying angles of cross-fractures were fabricated,and uniaxial compression tests coupled with AE monitor-ing were conducted to obtain mechanical parameters and AE characteristics,including ring counts and cumula-tive counts.The results indicate that cross-fractures significantly affect the stress-strain relationship and mechani-cal properties of rocks,particularly at fracture angles of 30°and 60°,where pronounced stress drops and local-ized damage phenomena occur.The analysis of energy dissipation reveals that during the compaction phase,rock absorbs and dissipates energy.In the elastic phase,energy is transformed into elastic strain energy.However,in the plastic phase,as micro-damage increases,the dissipated energy rises while the growth rate of elastic strain en-ergy decelerates.The AE ring count is closely related to the dynamic trend of dissipated energy.The propagation of fractures and the concentration of local stress promote frequent AE events,simultaneously intensifying the in-ternal energy dissipation of the rock and leading to a reduction in elastic strain energy.These findings provide a theoretical basis for the early warning of engineering disasters in fractured rocks within the field of civil engi-neering.关键词
交叉裂隙/能量耗散/声发射/力学行为/振铃计数Key words
cross-fractures/energy dissipation/acoustic emission/mechanical behavior/ringing count分类
土木建筑引用本文复制引用
刘旺,刘永胜,翟茂林..含交叉裂隙红砂岩能量耗散与声发射特征研究[J].华东交通大学学报,2025,42(5):38-48,11.基金项目
国家自然科学基金项目(51664014) （51664014）
江西省教育厅科学技术研究项目(GJJ2407501,GJJ2407506) （GJJ2407501,GJJ2407506）
