电解锰渣工程特性的试验研究

Experimental Study on Engineering Properties of Electrolytic Manganese Residue

通过一系列室内试验对电解锰渣的物理力学性质进行了研究,通过常规直剪试验与界面剪切试验,确定了电解锰渣在固结排水、固结不排水和不固结不排水条件下的力学性质,以及电解锰渣与高密度聚乙烯膜之间的界面抗剪强度。从物料特性角度探讨了铺膜防渗电解锰渣库稳定性分析中应该注意的问题。试验研究发现沉积电解锰渣的固结特性与大多数尾矿存在较大差异,其次固结沉降量大于主固结沉降量。电解锰渣在不固结不排水条件下强度很低,但固结排水后强度高于尾粉土和尾粘土。

A series of laboratory tests were conducted to determine chemical, physical and mechanical properties of electrolytic manganese residue, among which normal direct shear test and interface shear test were performed to determine mechanical properties of electrolytic manganese reside under consolidated-drained, consolidated-undrained and unconsolidated-undrained conditions, as well as the interface shear strength between electrolytic manganese reside and HDPE geomembrane. Issues need to be concerned in the stability analysis of electrolytic manganese residue storage with seepage-proofing membrane were discussed in terms of material properties. It was found from those tests that the consolidation properties of deposited electrolytic manganese residue are quite different from majority of railings, with the minor consolidation settlement larger than the major consolidation settlement. The shear strength reside is lower under unconsolidated-undrained conditions, however, it is increased after of electrolytic manganese being consolidated drained, much higher than those of tailings powder and tailings clay.