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Geotechnical and Geological Engineering

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20.03.2019 | Original Paper

A New Roof Strata Cavability Index (RSCi) for Longwall Mining Incorporating New Rating System

verfasst von: Sadjad Mohammadi, Mohammad Ataei, Reza Kakaie, Ali Mirzaghorbanali

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 5/2019

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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.

Vorheriger Artikel Prediction of Ground Settlement Due to Excavation of a Quasi-Rectangular Shield Tunnel Based on Stochastic Medium Theory

Nächster Artikel Perception of Risk and Sustainability: Concept Analysis of Environmental Justice and Sustainable Development in Geological–Geotechnical Risk Assessment Approaches

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Titel: A New Roof Strata Cavability Index (RSCi) for Longwall Mining Incorporating New Rating System
verfasst von: Sadjad Mohammadi
Mohammad Ataei
Reza Kakaie
Ali Mirzaghorbanali
Publikationsdatum: 20.03.2019
Verlag: Springer International Publishing
Erschienen in: Geotechnical and Geological Engineering / Ausgabe 5/2019
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-019-00857-6

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