Study on micro-mechanism of rockburst tendency of rock mass in underground engineering

doi:10.16265/j.cnki.issn1003-3033.2017.03.016

Abstract

Abstract: At present, there are more and more underground engineering projects facing more serious threat of rockburst. This thesis focuses on the study of micro-mechanism of rockburst based on the rock lithology. Four kinds of rock were chosen to and the data on the rockburs proneness mechanical tests and micro-structure tests. Based on both the data on the mineral composition and the data on the rockburs proneness of the samples, a quantitative criterion was established for the rockburst proneness .Two models were built respectively for series connection and parallel connection Mohs hardness-weighted to calculate the rockburst proneness. When the series connection Mohs hardness-weighted is bigger than 6.0 or the parallel connection Mohs hardness-weighted is bigger than 0.5, the rock shows strong rockburst proneness. When the series connection Mohs hardness-weighted is smaller than 4.0 or the parallel connection Mohs hardness-weighted of is smaller than 0.3, the rock shows weak rockburst proneness. The results show that the rock with hard and strong energy storage ability mineral shows strong rockburst proneness.

Key words: underground engineering, rockburst, rockburst tendency, micro-mechanism, Mohs hardness

CLC Number:

X915.5

LI Moxiao, SONG Yinghua, LYU Wei, WANG Zhe, FANG Danhui. Study on micro-mechanism of rockburst tendency of rock mass in underground engineering[J]. China Safety Science Journal, 2017, 27(3): 89-94.

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