석회석 노천광산의 공학적 설계에 의한 사전 타당성 평가
Pre-feasibility Assessment Based on Engineering Design of a Limestone Open Pit Mine
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본 연구에서는 개발중인 기존 채광지역에 인접한 광구내 신규 광체를 개발하려는 광산을 대상으로사전 타당성 평가를 수행했다. 이를 위해 대상광체의 품위분포에 대한 블럭모델을 기반으로 최종피트 (pit)를 설계하였으며, 연산 11백만 톤에 대한 생산계획을 수립하였다. 본 연구에서 채광비용은 일정한 단위 생산비용을 생산량과 곱하여 평가하는 방식이 아니라 생산량에 대한 공학적 설계기반의 평가방식을 적용하였다. 2020년에 평가된 비용을 평가시점이 지나 조사된 비용과 비교한결과, 두 비용간 오차는 실제 개발주체를 고려하면 낮은 것으로 나타났다. 신규 채광지역의 개발은경제성이 양호한 것으로 평가되었으며, 경제성에 가장 큰 영향을 미치는 인자는 광석의 가격으로나타났다.
Abstract
In this study, a pre-feasibility assessment was performed on a mine that intended to develop a new ore body adjacent to an existing mining area under development. For this purpose, a final pit was designed using a grade block model of the ore body, and a production schedule for 11 million tons per year was established. In this study, mining costs were evaluated using an engineering-based production evaluation rather than a constant unit cost multiplied by production. When the unit operating cost evaluated in 2020 was compared to the cost investigated after the evaluation point, the error between the two costs was observed to be low, particularly given the entity that actually mines ore. The mining a new mining area was deemed economically viable, with the ore price being the most significant factor.
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