谦比西铜矿缓倾斜中厚破碎矿体分流出矿技术

发布时间：2018-01-03 08:25

本文关键词：谦比西铜矿缓倾斜中厚破碎矿体分流出矿技术　出处：《金属矿山》2016年01期 　论文类型：期刊论文

【摘要】：缓倾斜中厚破碎矿体作为一种难采矿体,多年以来长期困扰采矿工程技术人员;而无底柱分段崩落法以其安全、高效和适应性强的优点,可以较好地适应该类型矿体的开采。但无底柱分段崩落法存在的下盘损失和贫化大问题,一直影响该采矿方法的应用效果。为解决该问题,以谦比希铜矿缓倾斜中厚破碎矿体开采为工程背景,依据随机介质放矿理论的放矿口分流效应,提出了双进路分流出矿技术方案。为了验证该方案的可行性,首先在实验室建立了放矿模型,根据进路的出矿顺序不同,设计了3种出矿方案。由实验结果可知:先从距离矿体较远的进路出矿,回采指标较好。基于实验室实验结果,在谦比希铜矿主采区西区408 m水平分段5#采场进行了工业试验,将回采率提高了9.34个百分点,贫化率降低了0.36个百分点,试验效果显著。
[Abstract]:As a kind of difficult mining body, gently inclined medium thick broken ore body has been puzzling mining engineers for many years. But the sublevel caving method without bottom pillar has the advantages of safety, high efficiency and strong adaptability, which can better adapt to the mining of this type of orebody. The application effect of this mining method has been affected all the time. In order to solve this problem, taking the mining of gently inclined medium broken orebody in Qiabishi Copper Mine as the engineering background, the diversion effect of drawing opening based on the theory of random medium drawing is used. In order to verify the feasibility of the scheme, a drawing model was established in the laboratory, according to the different ore extraction sequence of the route. From the experimental results, it can be seen that: first, from the far away from the orebody, the mining index is better, based on the experimental results. The industrial test was carried out in 408m horizontal section stope in the west part of the main mining area of Qiabishi Copper Mine. The recovery rate was increased by 9.34 percentage points and the dilution rate was reduced by 0.36 percentage points. The effect of the test was remarkable.
【作者单位】：东北大学资源与土木工程学院;
【基金】：国家自然科学基金项目(编号:51404065) “十二五”国家科技支撑计划项目(编号:2013BAB02B08) 中央高校基本科研业务费专项(编号:N140104008) 中国博士后科学基金项目(编号:2013M541244)
【分类号】：TD853.362;TD862.1
【正文快照】： 对于缓倾斜中厚矿体,其倾角较小,矿石难以靠自重流出,且厚度介于厚大矿体与薄矿体之间,开采空顶高度较大,顶板管理困难。因此,此类矿体是采矿领域较难开采的矿体之一。一般情况下,开采此类矿体可选择的采矿方法有房柱采矿法、分段空场采矿法、中深孔落矿嗣后充填法、机械化分

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