A new Roof Strata Cavability Index (RSCi) for longwall mining incorporating new rating system

Mohammadi, Sadjad and Ataei, Mohammad and Kakaie, Reza and Mirzaghorbanali, Ali (2019) A new Roof Strata Cavability Index (RSCi) for longwall mining incorporating new rating system. Geotechnical and Geological Engineering, 37 (5). pp. 3619-3636. ISSN 0960-3182

Abstract

This paper presents a new index to assess caving potential of roof strata above longwall panels. Nine inherent parameters were chosen as significant affecting factors in three categories, including roof strata characteristics, roof discontinuities properties and local features. Fuzzy hybrid multi criteria decision making was used by combining fuzzy analytic network process technique and fuzzy decision making trial and evaluation laboratory method to develop a new rating system. Subsequently, roof strata cavability index (RSCi) was defined as a simple summation of ratings for all parameters, indicating the cavability level qualitatively. The RSCi was applied to determine the cavability of various actual cases of worldwide longwall panels. In addition, the correlation between RSCi and span of main caving was examined where reliable performance of the new index was noted. It was concluded that RSCi is a simple and efficient tool to assess the cavability of immediate roof and evaluation of caving intervals in longwall mining.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 09 Oct 2019 02:13
Last Modified: 09 Oct 2019 05:16
Uncontrolled Keywords: longwall mining; immediate roof; caving potential; Roof Strata Cavability Index (RSCi)
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091402 Geomechanics and Resources Geotechnical Engineering
Socio-Economic Objective: B Economic Development > 85 Energy > 8502 Mining and Extraction of Energy Resources > 850201 Coal Mining and Extraction
B Economic Development > 84 Mineral Resources (excl. Energy Resources) > 8402 Primary Mining and Extraction Processes of Mineral Resources > 840299 Primary Mining and Extraction of Mineral Resources not elsewhere classified
Identification Number or DOI: 10.1007/s10706-019-00857-6
URI: http://eprints.usq.edu.au/id/eprint/37095

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