Phase Planning for Open Pit Coal Mines through Nested Pit Generation and Dynamic Programming
Phase Planning for Open Pit Coal Mines through Nested Pit Generation and Dynamic Programming
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DOI：
10.1155/2021/8219431
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发表时间：
2021-02
影响因子：
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通讯作者：
X. Gu;Qing Wang;Xiaochuan Xu;Xiaoqian Ma
中科院分区：
文献类型：
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作者：
X. Gu;Qing Wang;Xiaochuan Xu;Xiaoqian Ma
本文提出了一种专为近水平层状煤层矿床设计的阶段规划方法。为避免块体中煤岩混合，将这类存款的地质建模为柱状模型，而不是块体模型。一个嵌套凹坑生成算法的开发，用于产生一系列的嵌套，最小条带比凹坑与列模型作为其输入。该算法完全克服了令人烦恼的间隙问题。以最小剥采比凹坑为可能的相态，提出了一种动态规划公式，以最大化净现值为目标，同时优化相数、相凹坑数和极限凹坑数。通过对一个大型煤炭存款的实例研究，证明了该方法的优点和能力。
This paper presents a phase planning method specially designed for coal deposits with nearly horizontal, bedded coal seams. The geology of this type of deposit is modeled into a column model, instead of a block model, to avoid coal-rock mixing in blocks. A nested pit generation algorithm is developed for producing a series of nested, least-strip ratio pits with a column model as its input. The algorithm completely overcomes the troublesome gap problem. Taking the least-strip ratio pits as possible phase states, a dynamic programming formulation is proposed to simultaneously optimize the number of phases, the phase-pits, and the ultimate pit, with an objective of maximizing the net present value. The merits and capability of the proposed method are demonstrated through a case study on a large coal deposit.