CAJ | 학술논문

岩爆是高地应力区岩质隧道施工过程中经常发生的工程地质灾害,对其发生的可能性及其烈度分级预测一直是隧道工程世界性难题之一.基于功效系数法的基本原理,在综合考虑岩爆的关键影响因素基础上,选取σ_θ /σ_c 、σ_c /σ_t、W_(et)和I_s作为评价因子,建立了一种新的岩爆烈度分级预测模型.利用国内外典型岩爆工程实例对所建模型进行检验,判别结果与实际岩爆等级相符,且与集对分析法和可拓方法判别结果基本一致,表明运用功效系数法对岩爆烈度进行预测是合理的、可行的.再运用功效系数法对苍岭隧道岩爆危险性进行判别,预测结果与实际情况一致,说明基于功效系数原理的岩爆预测新方法具有较高的准确性和可靠性,且简单、易懂、可操作性强,具有良好的工程应用前景.
암폭시고지응력구암질수도시공과정중경상발생적공정지질재해,대기발생적가능성급기열도분급예측일직시수도공정세계성난제지일.기우공효계수법적기본원리,재종합고필암폭적관건영향인소기출상,선취σ_θ /σ_c 、σ_c /σ_t、W_(et)화I_s작위평개인자,건립료일충신적암폭열도분급예측모형.이용국내외전형암폭공정실례대소건모형진행검험,판별결과여실제암폭등급상부,차여집대분석법화가탁방법판별결과기본일치,표명운용공효계수법대암폭열도진행예측시합리적、가행적.재운용공효계수법대창령수도암폭위험성진행판별,예측결과여실제정황일치,설명기우공효계수원리적암폭예측신방법구유교고적준학성화가고성,차간단、역동、가조작성강,구유량호적공정응용전경.
Rockburst is one of the main geological hazards during tunnel construction in high geostress zone.The prediction of possibility and classification of rockburst is one of global problems of tunneling engineering.Based on efficacy coefficient method,a new model for predicting the classification of rockburst is established.Considering the key influential factors of rockburst comprehensively,four factors including σ_θ /σ_c,σ_c/σ_t,W_(et) and I_s are selected as evaluation indices.The model is tested by a series of rock projects at home and abroad.The obtained results are consistent with practical classification of rockburst and the results of set pair analysis method and extensional method; so it is shown that the efficacy coefficient method used to classify the rockburst intensity is reasonable and effective.Then,the model is applied to Cangling tunnel.The results are in good agreement with practical situation of rockburst.It is proved that the efficacy coefficient method used to classify rockburst intensity is exact and reliable.The efficacy coefficient method is simple and has very strong operability,which possesses a good prospect of engineering application.