采矿与岩层控制工程学报2025，Vol.7Issue(1)：6-17,12.DOI:10.13532/j.jmsce.cn10-1638/td.yszt-1025
含不同倾角预制结构面的深埋隧洞岩爆发生机制研究
Mechanism of rockburst in deep-buried tunnels with prefabricated structural planes of different inclinations
摘要
Abstract
To investigate the influence of structural plane dip angles on the rockburst mechanism in deep-buried tunnels,limestone samples from a deep mine in Yunnan,China,were prepared into cubic specimens(100 mm×100 mm×100 mm)with a central hole(ϕ=50 mm)to simulate underground tunnel.Prefabricated fissures were introduced in limestone samples to replicate structural planes.A high-speed camera system was employed to monitor the initiation and evolution processes of rockburst in specimens with varying inclination angles of structural plane.Additionally,compression tests on these specimens were simulated using PFC software to analyze the failure modes and stress-strain characteristics of tunnel structures under different inclination angles of structural plane.The results show that structural planes alter the transfer paths of stress and energy within the surrounding rock,leading to localized stress concentration in adjacent rock mass and triggering premature rockburst.Structural planes significantly amplify rockburst intensity,with intense shear ejection as the dominant failure mode of limestone surrounding rock.The degree of surrounding rock damage varies with the inclination angle of structural planes.Minimal damage occurs with the inclination angles of 0° and 180°,while the most severe damage is observed at an inclination angle of 90°.Furthermore,the inclination angle of structural planes exerts a pronounced influence on the stress characteristics of circular tunnels.Based on experimental data,the stress characteristic parameter of circular tunnels(σαmax/σc)was quantified in terms of inclination angle of structural plane.关键词
深埋隧洞/结构面/岩爆/真三轴试验/破裂机制Key words
deep-buried tunnels/structural plane/rockburst/true triaxial test/fracture mechanism分类
矿山工程引用本文复制引用
吴顺川,张侦锐,韩龙强,程海勇,李武,傅鑫..含不同倾角预制结构面的深埋隧洞岩爆发生机制研究[J].采矿与岩层控制工程学报,2025,7(1):6-17,12.基金项目
国家自然科学基金资助项目(42302313,52334004) （42302313,52334004）
云南省重大科技资助项目(202202AG050014) （202202AG050014）
