缓倾斜薄矿体机械化上向水平高分层分区充填采矿法

发布时间：2018-04-22 08:06

本文选题：缓倾斜薄矿体 + 贵重金属矿　；参考：《金属矿山》2017年04期

【摘要】：华东某金矿属于贵重金属缓倾斜类难采薄矿体。针对原采矿方法中存在的矿石损失贫化率高,采场生产能力低的问题,提出了充填开采新方案。新方案基于矿体和围岩均稳固的矿岩性质,增加采场的长度、阶段高度至100、50 m,提高开采分层高度至5 m,结合机械化开采生产效率高、作业安全的特点提出机械化上向水平高分层充填采矿法。为增大采场生产能力,降低矿石的损失率和贫化率,减少矿石开采成本,采用两步凿岩、分次出矿、一次分区充填的不留矿柱连续回采工艺,充填物料选用复合早强胶结材料和尾砂。生产实践表明:新方案回采效率明显增加,采场生产能力提高40%左右,矿石损失率和贫化率分别下降6%、5%,采矿直接成本与原采矿方法相当,矿山开采可以获得较高的经济效益和生态效益。
[Abstract]:A gold deposit in East China belongs to the thin orebody with gentle inclination of precious metals. In view of the problems of high ore loss dilution rate and low stope productivity in the original mining method, a new plan of filling mining is put forward. The new scheme is based on the stable ore and rock properties of ore body and surrounding rock, increases the length of stope, the stage height is up to 100 ~ 50 m, increases the height of mining stratification to 5 m, and combines mechanized mining with high production efficiency. The mechanized upward level high stratified filling mining method is put forward. In order to increase the production capacity of stope, reduce the loss rate and dilution rate of ore, and reduce the cost of ore mining, a continuous stoping process with two steps of rock drilling, separate ore drawing and one zone filling is adopted. Filling materials use composite early-strength cementing materials and tailings. The production practice shows that the mining efficiency of the new scheme is obviously increased, the stope production capacity is increased by about 40%, the ore loss rate and the dilution rate are reduced by 6% and 5%, respectively, and the direct cost of mining is similar to that of the original mining method. Mining can obtain higher economic and ecological benefits.
【作者单位】：金属矿山高效开采与安全教育部重点实验室;北京科技大学土木与环境工程学院;
【基金】：“十二五”国家科技支撑计划项目(编号:2012BAB08B02)
【分类号】：TD853.34;TD863

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