崩落法含矿覆盖层回收试验研究
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西北矿冶研究院

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白银市科技计划项目(2017-2-3G)


EXPERIMENTAL STUDY ON RECOVERY OF MINERAL-BEARING CAVING COVER LAYER
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Northwest Institute of Mining and Metallurgy

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    摘要:

    白银公司深部铜矿露天转地下过渡时期,在西部采区堆存了大量的含矿覆盖层,至今仍具有较高的回收价值和较好的回收条件。由于矿体形态的变化限制了含矿覆盖层的连续下降通道,加之矿山开采模式逐渐由崩落法向空场法、充填法转变后覆盖层已无存在必要,有必要及时合理回收含矿覆盖层,增加企业效益。在含矿覆盖层厚度、品位、块度现场调查的基础上,基本摸清了西部采区含矿覆盖层分布特点。通过室内模拟放矿实验确定了含矿覆盖层回收时的放矿步距、回收高度后,针对深部铜矿矿体赋存条件复杂特点,制定了矿体厚大地段含矿覆盖层回收方案和矿体中厚分枝地段含矿覆盖层回收方案。西部采区二中段675-750线区域开展含矿覆盖层现场回收试验期间,共回收含矿覆盖层3.66×104t,创造经济效益180.6万元。

    Abstract:

    A large number of mineral-bearing caving cover layers formed in the open-pit to underground period which still have high recovery value and good recovery conditions were piled up in the western area in Shenbu Copper Mine. For the change of ore body morphology limit the downward path of mineral-bearing caving cover layer and there is no longer necessary for mineral-bearing caving cover layer as the mining mode gradually changes from the caving method to the open-stope method and the filling method, recovering the mineral-bearing caving cover layer in time is a effective method to increase business efficiency. Based on the investigation of the thickness, grade and blackness, the characteristics of the mineral-bearing caving cover layer in the western area are basically ascertained. After determining the ore-removing step and recovery height by indoor simulated experiment and establishing the characteristics of ore body, two different recovering schemes for mineral-bearing caving cover layer in medium thick and thick branches ore body and thick ore body are been proposed. During the on-site recovery test, a total of 3.66×104t of mineral-bearing caving cover layers was recovered, creating an economic benefit of 1.8 million Yuan.

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  • 收稿日期:2018-12-03
  • 最后修改日期:2018-12-03
  • 录用日期:2018-12-07
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