ABSTRACT

The decision to exploit a mineral deposit that can be extracted by open pit and/or underground mining involves consideration of the following options: (a) independent open pit extraction; (b) independent underground extraction; (c) simultaneous open pit and underground (OPUG) extraction; (d) sequential OPUG extraction; and (e) combinations of (c) and (d). This paper investigates the extraction strategy for deposits using Mixed Integer Linear Programming (MILP) optimisation framework to maximise the net present value and determine the schedules for mining, processing, underground capital and operational developments, and 3D crown pillar position. The MILP framework is implemented for a gold deposit. The results showed a combined sequential and simultaneous open pit and underground (OPUG) mining with crown pillar as the optimal extraction option generating NPV that is 11% and 13% better than independent OP or UG mining, respectively.

摘要

决定可以通过露天和/或地下采矿开采的矿床的决定涉及以下选择：（a）独立露天开采；（b）独立的地下开采；（c）同时进行露天和地下开采（OPUG）；（d）顺序OPUG提取；（e）（c）和（d）的组合。本文研究了使用混合整数线性规划（MILP）优化框架提取矿床的策略，以最大化净现值并确定采矿，加工，地下资本和运营开发的时间表以及3D冠柱位置。MILP框架用于金矿。