Rock Mass Classification Method Based on Entropy Weight–TOPSIS–Grey Correlation Analysis

Bing Dai, Danli Li, Lei Zhang (), Yong Liu, Zhijun Zhang and Shirui Chen
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Bing Dai: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Danli Li: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Lei Zhang: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Yong Liu: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Zhijun Zhang: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China
Shirui Chen: School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China

Sustainability, 2022, vol. 14, issue 17, 1-18

Abstract: The accurate and reliable classification of rock mass is the basis of a reasonable engineering design. In the Xishan mining region of Sanshandao Gold Mine, three conventional rock mass classification methods of Tunneling Quality Index (Q), Rock Mass Rating (RMR) and China National Standard-basic quality (BQ), were compared in the burial depth area above 780 m, and it was discovered that the classification results of different rock mass classification methods had a low coincidence rate in the deep area; Therefore, this paper adopted entropy weight method, TOPSIS method and grey correlation analysis method to calculate the entropy weight and relative closeness of different methods in different middle sections. The study’s findings revealed that in the deep area, the relative closeness between each classification mass was: RMR > Q > BQ; Based on the above results, the IRMR method with modified RMR was selected for comprehensive analysis, and the concept of importance degree of evaluation index was defined; it was found that the importance degree of evaluation index of in-situ stress loss was the highest, while the importance degree of joint direction was the lowest; The “ETG” rock mass classification method based on “site-specific” is established, which provides a reference for the establishment of deep rock mass classification method.

Keywords: rock mass classification; entropy weight; TOPSIS; grey correlation; Tunneling Quality Index; Rock Mass Rating; BQ classification (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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