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

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.

Keywords

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