基于功效系数法的岩爆烈度分级预测研究  

Study of prediction of rockburst intensity based on efficacy coefficient method

作　　者：王迎超[1] 尚岳全[1] 孙红月[1] 严细水[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310058

出　　处：《岩土力学》2010年第2期529-534,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.40672185);浙江省重大科技专项社会发展重点项目(No.2006C13027)

摘　　要：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σθ/σc、σc/σt、Wet和Is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。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 σθ/σc、σc/σ1、Wct and Is 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.

关 键 词：隧道工程 岩爆 功效系数法 分级预测 影响因素 

分 类 号：TU457[建筑科学—岩土工程]