Kumar, Ashok and Singh, Arun Kumar and Ram, Sahendra (2021) Parametric study to design competent irregular-shaped remnants in mechanised depillaring. Arabian Journal of Geosciences, 14. ISSN 1866-7511

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Abstract

Mechanised depillaring (MD) has been proved to be a panacea for faster extraction of the developed pillars which is blocking access to deeper deposits and locking more than 3200 Mt of coal, developed by Bord and Pillar mining method in Indian coalfields. Depillaring of these square/rectangular-shaped developed pillars by continuous miner creates irregular-shapedribs/snooks. Stability assessment of such ribs/snooks becomes a challenging task due to various issues faced in estimation ofload acting upon it and their strength. Area-based approach for the design of rib/snook is found to be the most suitable criteriaduring MD. Field investigations supported for parametric investigation for a competent size of rib/snook with varying nature of roof and depth of cover. Taking help from previous studies to design such ribs/snooks on numerical models using FLAC3D,aparametric study is carried out using 3DEC. Strength of such ribs/snooks and load acting upon them is calculated with the help of calibrated numerical models in order to estimate their factor of safety. This paper presents a review of the previous researches and a novel numerical simulation technique for estimation of a competent size of rib/snook in a given geo-mining condition.

Item Type:	Article
Uncontrolled Keywords:	Ribs/snooks. Mechanised depillaring. Stress-strain characteristics. Factor of safety. Numerical modelling.Area-based design
Subjects:	Geo-Mechanics and Mine Design
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	19 Feb 2021 05:29
Last Modified:	19 Feb 2021 05:29
URI:	http://cimfr.csircentral.net/id/eprint/2324

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