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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Determination of drawpoint spacing in panel caving: a case study at the EI Teniente Mine
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Determination of drawpoint spacing in panel caving: a case study at the EI Teniente Mine

机译：面板崩落中垂线间距的确定：以EI Teniente矿为例

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Currently, in several caving operations, the spacing between the drawpoints is determined by consulting Laubscher's design guide (Laubscher 1994,2000), a methodology based on the gravity flow characteristics of the caved rock. Laubscher's methodology is based upon the height of interaction between adjacent flow zones, but does not allow calculation of primary recovery for a given layout. In this paper the authors present a technical and economic methodology based on the flow that occurs near the drawpoint and the associated development costs to estimate the optimal spacing. The flow model at the drawpoint was validated at the El Teniente mine, which extracts coarse caved rock. To validate the flow model, small-scale simulations using drawpoint clusters were conducted and results compared to extracted grades, marker recovery, and drill holes to determine ore remnants that are part of the production control programme at the mine. The results indicate that primary recovery depends on the height of interaction, which varies with the friction angle of the caved rock and the spacing between adjacent drawpoints. Primary recovery estimations indicate values from 85 per cent to 97 per cent depending on the drawpoint spacing used. Extrapolations were then conducted to estimate the primary recovery for different drawpoint configurations planned to be used in the New Mine Level of the mine. The results indicate that the optimal drawpoint spacing is 32 m x 20 m with a through length of 18 m. The methodology developed may be used to estimate optimal drawpoint spacing for block caving mines under different metal prices and mine cost conditions.
机译：目前，在一些崩落作业中，通过参考Laubscher的设计指南（Laubscher 1994，2000）来确定汲取点之间的间距，Laubscher的设计指南是基于洞穴岩石重力流特征的方法。 Laubscher的方法基于相邻流区之间相互作用的高度，但不允许计算给定布局的一次采收率。在本文中，作者提出了一种技术和经济的方法，该方法基于在抽油点附近发生的流量以及相关的开发成本来估计最佳间距。在El Teniente矿对抽水点处的流动模型进行了验证，该矿提取了粗大的塌陷岩石。为了验证流动模型，进行了使用汲取点群集的小规模模拟，并将结果与​​提取的品位，标记回收率和钻孔进行了比较，以确定作为矿山生产控制程序一部分的残余矿石。结果表明，初次采收率取决于相互作用的高度，相互作用的高度随溶洞岩石的摩擦角和相邻汲取点之间的间距而变化。初步回收率估计值取决于所使用的汲取点间距，介于85％至97％之间。然后进行推断，以估算计划在矿山的新矿层使用的不同抽水点配置的主要采收率。结果表明，最佳穿引点间距为32 m x 20 m，直通长度为18 m。所开发的方法可用于估算在不同金属价格和矿山成本条件下的崩落式矿山的最佳抽矿间距。

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