采矿与岩层控制工程学报2026，Vol.8Issue(4)：160-173,14.DOI:10.13532/j.jmsce.cn10-1638/td.2025-1242
巷道岩爆过程拉剪破裂演化与临界慢化预警
Tensile shear fracture evolution and critical slowing down early warning in roadway rockburst processes
摘要
Abstract
To investigate the crack evolution mechanism and precursor characteristics of rockburst,granite roadway rockburst simulation experiments were conducted using a true triaxial testing machine.The evolution of tensile and shear cracks was analyzed,showing that tensile cracks dominate in the early stage,whereas shear cracks prevail as failure approaches.Accordingly,a new monitoring index—the Tensile-Shear Ratio(TSR)—was proposed to quantify the dynamic evolution of both crack types.Based on the theory of critical slowing down,the autocorrelation coefficients and variances of acoustic emission(AE)parameters were examined.Results indicate that AE duration,peak frequency,amplitude,ringing count,rise time,RA value,RA/AF,and TSR all increased significantly prior to rockburst,exhibiting typical precursor behavior and underscoring the advantages of this theory for early warning.A precursor response coefficient was further defined to quantitatively compare precursor sensitivity.TSR showed the highest response coefficient,with precursors appearing earlier and demonstrating stronger timeliness in early warning,while traditional AE parameters exhibited comparable effectiveness.These findings provide a novel parameter and theoretical foundation for advancing rockburst monitoring and early warning.关键词
岩爆/声发射/拉剪裂纹数量比/临界慢化理论/前兆特征Key words
rockburst/acoustic emission/tensile-shear ratio/critical slowing down theory/precursor characteristics分类
矿业与冶金引用本文复制引用
梁鹏,鲁遥,张艳博,姚旭龙,于光远,韩强..巷道岩爆过程拉剪破裂演化与临界慢化预警[J].采矿与岩层控制工程学报,2026,8(4):160-173,14.基金项目
国家自然科学基金资助项目(52474098) （52474098）
河北省自然科学基金资助项目(23564201D) （23564201D）
