Agrawal, Harshit and Singh, Satyendra Kumar and Mandal, P. K. and Singh, A. P. (2015) 3-Dimensional numerical modelling: an effective enabler for CM deployment in coal seams. Journal of Mines, Metals & Fuels, 63 (5&6). pp. 111-118. ISSN 0022-2755

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Abstract

Continuous miner (CM) is deployed worldover for both development and depillaring in coal seams. Compared to conventional bord and pillar (B&P) working, the workings with CM deployment are generically of higher dimensions i.e. of wider gallery (6.0 or more) and, as the case may be, of enhanced (more than 3 m, the statutory) height, may be from very start of the operation, understandably, the CM deployment is associated with faster rate of development advance and also swifter retreat during depillaring. Roof bolts (resin-grouted primarily) are widely used support system as an effective and economical way with CM deployment. In India. Designers have now started considering the option of mobile roof supports. CM deployment has demanded a paradigm shift in understanding and assessing the related ground control problems and the parameters which are dominant here, have not been given due importance while developing empirical norms/formulations, the latter mostly in case of conventional B&P workings. Furthermore, rocks are idiosyncratic in nature. Empirical normsare condemned to be site-specific or limited to the range-specific of considered parameters. In such situation, numerical modelling provides researchers a handy tool to assess the stability of the workings and to design support, linking with suitable of the workings and to design support, linking with suitable support safety factor (SSF). It is possible to establish a methodology to undertake the modeling so that CM deployment established mainly in Australia, USA and South Africa may take up the gruntlet in underground coal mining. The paper describes, in brief, about the aspects of numerical modeling calculations of rock loads, estimation of block safety factor contours and finally the execution of design parameters and geometry in a demonstrative case study.

Item Type:	Article
Subjects:	Bord and Pillar Mining
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	25 Sep 2015 05:33
Last Modified:	05 Sep 2016 05:03
URI:	http://cimfr.csircentral.net/id/eprint/1521

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