岩土力学2026，Vol.47Issue(7)：2273-2284,2359,13.DOI:10.16285/j.rsm.2025.0742
压应力下岩石纵波波速响应规律及岩体完整性指数工程适用性修正方法
Response law of rock longitudinal wave velocity under compressive stress and engineering applicability correction method for rock mass integrity index
摘要
Abstract
To investigate the superposition effect of three-dimensional compressive stress on the longitudinal wave velocity of rocks and improve the testing precision of the rock mass integrity index,this study takes sandstone-like materials as the research object and measures the evolution law of axial and transverse longitudinal wave velocities in specimens under compressive stress.The internal crack evolution process is qualitatively characterized by the crack volume strain,revealing the physical essence of the longitudinal wave velocity variations.Based on the principles of the acoustic-elastic effect,a correction model for the longitudinal wave velocity of rock blocks under the coupling effect of three-dimensional principal stresses is established,and a method for correcting the rock mass integrity index under the condition of a corrected three-dimensional in-situ stress field is obtained.The results indicate that the evolution of the longitudinal wave velocity,measured both axially and transversely,corresponds to the four distinct stages of rock mass failure.The corresponding variations in the longitudinal wave velocity across different stages can be attributed to three primary factors:micro-crack closure and initiation altering wave propagation paths,rock mass compaction enhancing stiffness,and the marked anisotropy of newly generated micro-cracks.The proposed correction model for the longitudinal wave velocity and the associated method for revising the rock mass integrity index demonstrate broad engineering applicability.This approach significantly enhances the measurement precision of the rock mass integrity index,thereby facilitating a more refined classification of rock mass quality.关键词
岩体/地应力/纵波波速/岩体完整性指数/声弹性效应Key words
rock mass/in-situ stress/longitudinal wave velocity/rock mass integrity index/acoustic-elastic effect分类
建筑与水利引用本文复制引用
闻磊,迟洪锋,刘大金,章爱卫,张飞,于俊红,杨治刚..压应力下岩石纵波波速响应规律及岩体完整性指数工程适用性修正方法[J].岩土力学,2026,47(7):2273-2284,2359,13.基金项目
国家自然科学基金区域创新发展联合基金(No.U23A2068). This work was supported by the National Natural Science Foundation of China(U23A2068). （No.U23A2068）
