小打鹅尾矿库筑坝尾矿的动力学特性试验研究

doi:10.13722/j.cnki.jrme.2016.0177

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Abstract

A dynamic triaxial test of tailing slity sand and silt was conducted in order to investigate the dynamic characteristics of Xiaodae tailings and compare the different behaviors of these two tailings. The main experimental conditions consider natural consolidation and mechanical compaction. To make the research results more convincing，the particle size distribution and micro morphology of the tailings were both tested in detail. The results demonstrate that：the clay particles of tailings with less clay mineral cannot enhance dynamic strength. The dynamic shear stress ratio t_d/s_3c under different confining stresses can be normalized well. The increase of dynamic pore water pressure is influenced by vibration time primarily rather than magnitude of dynamic stress. The dynamic internal friction angle j_d decreases with the increase of failure vibration time，and the dynamic effective internal friction angle j_d is ruled by the increase of dynamic pore water pressure. The maximum dynamic elastic modulus E_d0 increases with the increase of confining pressure or consolidation ratio，whereas the maximum damping ratio l_max changes oppositely with these two factors. In contrast to tailing slit sand，tailing silt has the lower dynamic strength and dynamic elastic modulus. The mechanical compaction is more effective for tailing silt，which is beneficial to the dynamic characteristics of both tailings.

Key words： mining engineering tailings dynamic triaxial test dynamic strength dynamic pore water pressure dynamic elastic modulus damping ratio

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	Articles by authors
	YIN Guangzhi1
	2
	WANG Wensong1
	2
	WEI Zuoan1
	2
	CAO Guansen1
	2
	ZHANG Qiangui1
	3
	CHEN Yulong4

Cite this article:

YIN Guangzhi1,2,WANG Wensong1, et al. Experimental study on the dynamic characteristics of embankment tailings from Xiaodae tailings pond[J]. , 2017, 36(S1): 3121-3130.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0177 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS1/3121

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