白鹤滩大型地下厂房开挖围岩片帮破坏特征、规律及机制研究

doi:10.13722/j.cnki.jrme.2015.0933

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Abstract The underground powerhouse caverns of hydropower station at Baihetan of Jinsha river is under construction currently and is large in size and complex in geological environment. Spalling failure of local surrounding rock occurred frequently in the excavation of the first layer of the left and right powerhouse. An overall summary and a deep analysis of the mechanism of rock spalling failure in basalts was made combined with the geological，construction，testing，experimental and numerical data. Firstly，the characteristics and laws of spalling failure，including the failure forms，the morphological characteristics，the spatial location，the scale of destruction，the lagging，the failure development process，the lithology and the support status were summarized. Secondly，the influence of the geo-stress，rock structure，lithology，construction factors on the surrounding rock failure were fully discussed. Finally，comprehensive analyses were made to reveal the mechanisms of spalling failure.

Key words： rock mechanics underground powerhouse rock spalling failure characteristics failure mechanism Baihetan hydropower station

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	Articles by authors
	LIU Guofeng1
	FENG Xiating1
	JIANG Quan1
	DUAN Shuqian1
	YAO Zhibin2
	PEI Shufeng1
	DUAN Xingping3
	ZHOU Mengxia3

Cite this article:

LIU Guofeng1,FENG Xiating1,JIANG Quan1, et al. Failure characteristics，laws and mechanisms of rock spalling in excavation of large-scale underground powerhouse caverns in Baihetan[J]. , 2016, 35(5): 865-878.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.0933 OR http://www.rockmech.org/EN/Y2016/V35/I5/865

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