柱状节理玄武岩的破坏模式、破坏机制及工程对策

doi:10.13722/j.cnki.jrme.2015.0006

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Abstract Columnar jointed rock mass is a geological endemism in volcanic rock area with special geological genesis. Its engineering characteristics and excavation responses are obviously different from that of common intact rock mass. In this work，according to the excavation responses and revealed phenomenon of columnar jointed basalt rock mass in tunnel，the typical failure modes and their failure mechanisms of columnar jointed basalt rock mass are studied and summarized，with rock mechanics theoretic analysis and numerical analysis. In addition，based on the unloading and relaxation characteristics of columnar jointed basalt rock mass and in-situ monitoring and test data，the reasonable and feasible support methods and construction methods are discussed and proposed，such as support measurements，support opportunity，excavation scheme， demolish control and so on. These proposed methods are good for controlling columnar jointed rock mass relaxation，deformation and relaxation spreading，so as to enhance the stability under complex geological conditions of underground space such as chamber，house，tunnel and shaft and etc.. The effectiveness and reliability of above-mentioned research results are tested and verified during follow-up tunnel excavation.

Key words： rock mechanics underground cases columnar jointed basalt failure mode countermeasures

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	Articles by authors
	NI Shaohu1
	2
	HE Shihai1
	CHEN Yimin1
	2
	PAN Yibing1
	2
	LU Kang1
	YANG Fei1
	ZHENG Haisheng1

Cite this article:

NI Shaohu1,2,HE Shihai1, et al. The failure modes，failure mechanisms and countermeasures of columnar jointed basalt rock mass[J]. , 2016, 35(S1): 3064-3076.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0006 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3064

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