Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 31    No. 12    December 2021

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Open pit limit optimization considering economic profit, ecological costs and social benefits
Xiao-chuan XU, Xiao-wei GU, Qing WANG, Yun-qi ZHAO, Zong-kang WANG

College of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China

Abstract:Pit limit design has, up to date, focused mainly on maximization of economic profit alone, with environmental and social issues largely ignored. This paper focuses on incorporating both environmental and social issues in the pit limit design process and provides an approach to pit limit optimization that is in compliance with sustainable development. The case study demonstrates that ecological costs have a substantial down-sizing effect and social benefits have a substantial up-sizing effect on the optimal pit limit. When the ecological costs are factored in, the optimal pit limit is 37.5% smaller than the economically optimal pit limit. However, when the social benefits are factored in, the optimal pit limit is 48.3% larger than the economically optimal one. The overall optimal pit limit, with the economic profit, ecological costs and social benefits simultaneously considered, is a result of balancing conflicting goals of maximizing economic profit, minimizing ecological cost, and maximizing social benefit.

 

Key words: open pit mine; pit limit; economic profit; ecological cost; social benefit; sustainable development

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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