易溶盐对锰渣动力学特性的影响研究

doi:10.13722/j.cnki.jrme.2021.1020

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摘要锰渣是生产金属锰时排放的固体废弃物，其含有的易溶盐对其物理力学特性有较大影响。对脱盐前后的2种锰渣开展动三轴试验，获得易溶盐溶解对锰渣动力学特性的影响规律，为锰渣库地震响应和抗震稳定性的评估提供基础。结果表明：相同条件下，脱盐锰渣滞回圈较原锰渣衰退较快，原锰渣滞回圈面积及塑性变形均小于脱盐锰渣；2种锰渣的动强度曲线均呈幂函数形式，但脱盐锰渣较原锰渣更易被破坏；同一条件下，脱盐锰渣的最大动剪切模量和动剪切模量均小于原锰渣，而阻尼比较原锰渣更大；利用Davidenkov模型和Hardin模型分别对锰渣的动剪切摸量比和阻尼比特性进行拟合分析，脱盐锰渣的两项性能均比原锰渣差。易溶盐的流失会使锰渣的动力学性能降低，从而影响锰渣库的抗震稳定性。因此，在锰渣库的运行管理过程中，应特别关注降雨入渗等引起锰渣中的易溶盐流失。

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	王亚1
	2
	魏作安1
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	李世龙1
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	王文松1
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	3
	郑彬彬4
	路停1
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关键词 ：采矿工程, 锰渣, 易溶盐, 滞回圈, 动强度, 动剪切模量, 阻尼比

Abstract：Manganese residue is a solid waste generated by the production of electrolytic manganese. And it contains soluble salts，which have a significant effect on its physical and mechanical properties. In this paper，the dynamic triaxial tests of two kinds of manganese residue，original and desalted states，were carried out. The effect of soluble salts in manganese residue on the dynamic characteristics was obtained，which provided a basis date for the earthquake response and seismic stability assessment of manganese residue pond. The results show that the hysteretic circle of desalted manganese residue decline faster than the original at the same conditions. Meanwhile，the hysteretic circle area and plastic deformation of original manganese residue are smaller than those of the desalted. The dynamic strength curves of the two kinds of manganese residue are both in the form of power function，but the desalted manganese residue is more easily damaged than the original. At the same condition，the maximum dynamic shear modulus and dynamic shear modulus of desalted manganese residue are both smaller than those of the original，but its damping is larger than original manganese residue. The Davidenkov model and Hardin model were used to fit the dynamic shear modulus ratio and damping ratio of manganese residue，respectively. And these two properties of desalted manganese residue are worse than those of the original. The dissolution of soluble salt would reduce the dynamic characteristics of manganese residue，thereby，affecting the seismic stability of manganese residue pond. Therefore，during the operation and management of manganese residue pond，special attention should be paid to the dissolution of soluble salts in manganese residue caused by rainfall infiltration.

Key words： mining engineering manganese residue soluble salt hysteretic loop dynamic strength dynamic shear modulus damping ratio

引用本文:

王亚1，2，魏作安1，2，李世龙1，2，王文松1，2，3，郑彬彬4，路停1，2. 易溶盐对锰渣动力学特性的影响研究[J]. 岩石力学与工程学报, 2022, 41(12): 2543-2553.
WANG Ya1，2，WEI Zuoan1，2，LI Shilong1，2，WANG Wensong1，2，3，ZHENG Binbin4，LU Ting1，2 . Effect of soluble salts on dynamics characteristics of manganese residue. , 2022, 41(12): 2543-2553.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1020 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I12/2543

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