Predicting the reactions of the backfill materials exposed to the effects of air and groundwater will eventually ensure an efficient and accurate mine fill system for sustainable mining operations. This paper reveals the effect of the mobility of sulfur ions within lead-zinc processing tailings on strength and quality of cemented mine backfills. Some laboratory tests such as X-ray diffraction, ion chromatography, scanning electron microscopy, combustion tests, chemical analysis, pH and zeta potential measurements were performed to better characterize the backfill’s mechanical and microstructural properties. Moreover, CEM II/A-P Portland pozzolan and CEM IV/A pozzolanic cements as ready-to-use cement products were used for cemented mine backfill preparation. To ensure the carrier of the lead-zinc tailings and to prevent the mobility of the sulfurous components, a binder content ranging from 3 to 7 wt% were employed in mine backfills. The experimental findings demonstrate that the used cement type and proportions were insufficient and some fractures are occurred in the samples due to the sulfur ion mobility. Accordingly, one can state clearly that the elemental analysis through the combustion test method can provide fast and reliable results in the determination of sulfur within lead-zinc processing tailings.

预测回填材料在空气和地下水影响下的反应将最终确保有效和准确的矿山填充系统，以实现可持续的采矿作业。本文揭示了铅锌加工尾矿中硫离子的迁移率对胶结矿山回填土的强度和质量的影响。进行了一些实验室测试，例如 X 射线衍射、离子色谱、扫描电子显微镜、燃烧测试、化学分析、pH 值和 zeta 电位测量，以更好地表征回填物的机械和微观结构特性。此外，CEM II/AP 波特兰火山灰和 CEM IV/A 火山灰水泥作为即用型水泥产品用于水泥矿回填制备。为确保铅锌尾矿的载体和防止含硫成分的流动，矿山回填土中使用了 3 至 7 wt% 的粘合剂含量。实验结果表明，使用的水泥类型和比例不足，由于硫离子的迁移，样品中出现了一些裂缝。因此，可以明确地说，通过燃烧试验法进行元素分析，可以快速、可靠地测定铅锌加工尾矿中的硫。