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胶结充填技术逐渐应用于低温高寒资源开发中,同时会产生充填体强度过低、塌方、冒落等一系列难题。以某金矿寒区开采为背景,通过试验对比,综合研究养护温度、水泥掺入量及料浆浓度对充填体性能的影响。在实现自流输送前提下,确定合理的废石破碎胶结充填配合比及养护温度。结果表明:与铁矿尾砂充填相比,采用废石破碎胶结充填具有明显优势,料浆浓度可以达到75%;低温阻碍了水泥水化反应的进行,养护温度越高,单轴抗压强度越大,提高养护温度有利于充填体强度的提升;养护温度对充填体早期强度影响较大,后期相对较小。提出废石破碎胶结充填拌合水预加热方案,并进行现场工业试验,为寒区矿山废石充填提供理论基础和技术参考。
Cementing filling technology is gradually applied to the development of low temperature and high temperature resources, at the same time, it will produce a series of problems such as low strength, collapse, collapse and so on. Taking the exploitation of cold area in a gold mine as the background, the effects of curing temperature, cement content and slurry concentration on the properties of filling body were comprehensively studied through experiments. Under the premise of realizing gravity flow transportation, determine the reasonable ratio of waste rock crushing cement filling and curing temperature. The results show that compared with iron ore tailings filling, the use of waste rock crushing cementation filling has obvious advantages, the slurry concentration can reach 75%; low temperature hinders the cement hydration reaction, the curing temperature is higher, the uniaxial compressive strength The larger the temperature, the higher the curing temperature is, the better the filling strength is. The curing temperature has a greater influence on the early strength of the filling body and the later is relatively small. Proposed waste rock broken cement filling pre-heating water mixing scheme, and conducted on-site industrial test, providing the theoretical foundation and technical reference for the waste rock fill in cold area.