Mining Method Optimization of Difficult-to-Mine Complicated Orebody Using Pythagorean Fuzzy Sets and TOPSIS Method

Shuai Li, Qi Huang, Boyi Hu (), Jilong Pan (), Junyu Chen, Jianguo Yang, Xinghui Zhou, Xinmin Wang and Haoxuan Yu
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Shuai Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Qi Huang: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Boyi Hu: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Jilong Pan: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Junyu Chen: Zhejiang Suichang Gold Mine Co., Ltd., Lishui 323304, China
Jianguo Yang: Zhejiang Suichang Gold Mine Co., Ltd., Lishui 323304, China
Xinghui Zhou: Zhejiang Suichang Gold Mine Co., Ltd., Lishui 323304, China
Xinmin Wang: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Haoxuan Yu: Civil Engineering Discipline, School of Engineering, Monash University, Malaysia Campus, Bandar Sunway 47500, Malaysia

Sustainability, 2023, vol. 15, issue 4, 1-20

Abstract: In Suichang gold mine, the altered rock type gold deposits were cut by faults and joint fissures, leading to complex resource endowment characteristics, large changes in occurrence, a serious complex of ore vein branches and great difficulty in mining. In order to select a suitable mining method for such a difficult and complicated orebody, a multi-factor and multi-index comprehensive evaluation system involving benefits, costs, safety and other aspects was constructed by using the Pythagorean fuzzy sets and TOPSIS method. Taking Suichang gold mine as an example, the weighted aggregation evaluation matrix was constructed, the closeness index of the four mining schemes were 0.8436, 0.3370, 0.4296 and 0.4334, and the mechanized upward horizontal layering method was determined as the optimal scheme. This method overcame the fuzzy comparison of economic and technical indicators directly, but converted them into corresponding fuzzy numbers to obtain accurate closeness index for optimization. The application of this method not only ensured a safe, efficient and environment-friendly mining effect, but also provided a reference for the optimization of the mining scheme of the severely branched composite orebody.

Keywords: mining method optimization; difficult-to-mine complicated orebody; multiple attribute decision making; Pythagorean fuzzy sets and TOPSIS method; mechanized upward horizontal layering method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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