高分子材料改良尾矿力学性能的试验研究

doi:10.13722/j.cnki.jrme.2019.1096

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Abstract The mechanical properties of stored tailings are the key factors that affect the stability of the tailings dam. Based on the method of chemically improving soil mechanical properties，the mechanical properties of the polymer improved tailings were studied. Results show that the shear strength of tailings improved by polyvinyl alcohol and sodium carboxymethyl cellulose is smaller than that of unimproved tailings. But the shear strength of the tailings improved by polyacrylamide and calcium lignin sulfonate are increased. Compared with the shear strength parameters of unimproved tailings，the cohesion of the tailings improved by polyacrylamide，sodium carboxymethyl cellulose，calcium lignin sulfonate are increased. The cohesion of the polyvinyl alcohol improved tailings is decreased. The internal friction angle of the polyacrylamide and calcium lignin sulfonate improved tailings are increased. The internal friction angle of the tailings improved by sodium carboxymethyl cellulose and polyvinyl alcohol is decreased. Among the four kinds of polymer materials，the improvement effect of polyacrylamide is most significant. After curing for 7 days，the mechanical properties of polyacrylamide-improved tailings tended to be stable. The shear strength of improved tailings increases with the increase of polyacrylamide concentration. Additionally，the results of immersion test，dry-wet cycle test and freeze-thaw cycle test show that polyacrylamide-improved tailings have good water stability and aging resistance.

Key words： mining engineering tailings mechanical properties polymer materials water stability

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	Articles by authors
	WEI Zuoan1
	2
	ZHAO Junkang2
	3
	QIN Hu1
	YANG Yonghao2
	3

Cite this article:

WEI Zuoan1,2,ZHAO Junkang2, et al. Effects of polymer materials on the mechanical properties of tailings[J]. , 2020, 39(S1): 3095-3102.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.1096 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/3095

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