基于主成分分析的岩爆倾向性预测试验研究

Experimental research of rock burst tendency prediction based on principal component analysis

摘要

岩爆是水工隧洞开挖过程中主要工程地质灾害之一，岩爆倾向性预测是必须解决的岩石工程的重大问题。岩爆倾向性评价指标目前尚未形成统一的标准，导致隧洞开挖工程岩爆灾害难以准确预测、防控。基于此，在室内岩爆倾向性试验的基础上，选择四种岩爆倾向性指标进行主成分分析，提取出了可以用来解释岩爆倾向性的主成分，获得了对应四种岩爆倾向性指标的权重，从而完成了岩爆倾向性的综合定级，这种综合定级方法为水工隧洞施工现场的工作人员能准确及时地判断岩爆等级提供了一种新方法和新思路。

Abstract

Rock burst is one of the main engineering geological hazards during the excavation of hydraulic tunnel. Rock burst propensity prediction is a major problem in rock engineering that must be solved. At present, the evaluation index of rock burst tendency of rock has not formed a unified standard, which makes it difficult to accurately predict and prevent rock burst disaster of hard rock engineering. Based on the laboratory test of rock burst liability, four kinds of rock burst tendency indexes are selected for principal component analysis, the principal components which can be used to explain rock burst tendency are extracted, the weights corresponding to four kinds of rock burst tendency indexes are obtained so that the comprehensive grading of rock burst tendency has been completed. This comprehensive grading method provides a new method and a new idea for the workers of hydraulic tunnel construction site to judge the rock burst grade accurately and timely.

关键词

岩爆倾向性预测 / 主成分分析 / 室内试验 / 岩爆倾向性指标 / 权重

Key words

prediction of rock burst tendency / principal component analysis / laboratory test / rock burst tendency index / weight

Author summay

努尔哈斯木·穆哈买提汗(1970—), 男, 高级工程师, 学士, 主要从事岩土混凝土方面的试验研究工作。E-mail: [e-mail]