废石尾砂胶结充填工艺模型试验研究*

为深入解决制约废石尾砂胶结充填工艺发展的关键技术问题,探究废石尾砂胶结充填料浆沉积及堆存规律,设计了废石尾砂胶结充填工艺模型试验装置,依据采矿工艺、充填工艺原则及工程布置要求,制定了废石尾砂胶结充填模型试验方案,运用形态测量及充填体横剖切割揭露等手段进行充填体模型质量评价,并确定了最佳充填工艺。 研究表明,无论是废石均匀铺设还是废石锥形堆放下料方式,废石料与尾砂胶结料浆同步下料时,充填体胶结效果最佳；选择最适宜的充填工艺技术不仅能有效提高废石尾砂胶结充填体强度,而且能减少水泥用量,节约充填成本,同时试验结果也为试验矿山井下充填工艺优化提供了科学依据。

Model-experimental study on cemented rock-tailings backfilling process

In order to solve the key technology problems of cemented rock-tailings filling(CRF) and discuss slurry sedimentation behavior, the model-experimental device of CRF was devised, experimental schemes of CRF were prepared according to the mining with backfill method and in-situ engineering project,and the estimation of quality of CRF were carried out using morphometry and cross-section cutting of filling, with giving the optimum backfill process. The research results show the backfilling quality is better when waste rock and tailings synchronously dump, be it waste rock even laid or tapered stacked; The feasible and optimum backfill process can effectively improve compressive strength of cemented rock-tailings filling, but also effectively reduce cement dosage, economize backfill cost, at the same time test results can afford scientific evidence for the optimization of backfill of test mine.