甘肃某铅锌矿尾砂胶结充填试验研究

Experimental study on cementation filling of tailings in a lead-zinc mine in Gansu

甘肃某铅锌矿建矿已有30多年,矿山现有尾矿库即将达到服务年限,矿山在不建新尾矿库的情况下,为新产生的尾砂寻找经济合理、安全环保的处置方式。经过多年开采,井下已存在大量采空区,矿山拟采用全尾砂充填采空区的方式解决尾砂堆存问题,同时对采空区进行治理。在保证尾砂输送至采空区后能正常胶结的前提下,寻求最经济的灰砂比,本文分别以水泥和新型胶结材料作为胶凝材料进行试验,确定最优的尾砂浓度、灰砂比和胶凝材料。通过试验,在满足充填体正常胶结的情况下,选用新型胶结材料作为胶凝材料所需要的灰砂比更小,充填成本更低,从而为矿山提供更经济、安全的充填方案,为矿山解决尾矿处置找到了更经济、安全环保的方式。

A lead-zinc mine in Gansu has been constructed for more than 30 years,and the mine's existing tailings pond is about to reach the length of service.The mine will find an economically reasonable,safe and environmentally protection disposal method for the new tailings without building a new tailings pond.After many years of mining,a large number of goafs have been existing in the mine.The mine plans to use unclassifying tailings to fill the goafs to solve the problem of tailings storage and to control the goafs.In order to seek the most economical lime-sand ratio on the premise of ensuring that the tailings can be cemented normally after being transported to the goafs,in this paper,cement and new cemented materials are used as cementing materials to test,to determine the optimal tailings concentration,lime-sand ratio and cementing materials.Through the experiment,under the condition of satisfying the normal cementation of the filling body,the selection of the new cementing material as the cementing material requires a smaller lime-sand ratio and lower filling cost.Therefore,it provides a more economical and safe filling solution for the mine,and finds a more economical,safe and environmentally protection way for the mine to solve the tailings disposal.