尾砂溢流水对膏体充填体强度影响研究  

A Study on Influence of Tailings Overflow Water on the Strength of Paste Backfill

作　　者：张涛 李德贤 张鹏强 赵国亮 何宇 何思涵 ZHANG Tao;LI Dexian;ZHANG Pengqiang;ZHAO Guoliang;HE Yu;HE Sihan(State Key Laboratory for Comprehensive Utilization of Nickel and Cobalt Resources,Jinchang,Gansu 737100,China;Jinchuan Nickel and Cobalt Research and Design Institute,Jinchang,Gansu 737100,China)

机构地区：[1]镍钴资源综合利用国家重点实验室,甘肃金昌737100 [2]金川镍钴研究设计院,甘肃金昌737100

出　　处：《中国锰业》2023年第1期11-15,21,共6页China Manganese Industry

基　　金：国家自然科学基金重点项目(51734001);镍钴资源综合利用国家重点实验室基金项目(201902)。

摘　　要：为了研究尾砂溢流水对废石-全尾砂膏体充填体的影响,通过扫描电镜、X射线衍射(XRD)等试验方法,分析尾砂溢流水、尾砂的粒级分布、化学成分,探讨尾砂溢流水对水泥质量、膏体充填体强度的影响,并论证尾砂溢流水导致后期强度降低的机理。结果表明:尾砂溢流水的化学成分满足井下膏体充填用水要求,添加尾砂溢流水较新水充填体前期强度提高16%~34%;但后期充填体强度由于酸性环境和含硫尾砂的影响,充填体强度降低约14%。To study the influence of tailings overflow on waste rock full tailings paste filling, the particle size distribution and chemical composition of tailings overflow and tailings were analyzed by means of scanning electron microscope, X-ray diffraction(XRD) and other experimental methods. The influence of tailings overflow on cement quality and paste filling strength was discussed, and the mechanism of tailings overflow leading to later strength reduction was demonstrated. The results show that the chemical composition of tailings overflow water meets the requirements of underground paste filling water. We have found that the strength of tailings overflow water is increased by about 16%~34% in comparing with that of fresh water filling. However, due to the influence of acid environment and sulfur-containing tailings, the strength of filling body decreased by about 14% in the later stage.

关 键 词：尾砂溢流水 膏体充填 充填体强度 固废利用 

分 类 号：TD861[矿业工程—金属矿开采]