Safe exploitation of developed pillars of a coalseam above fire affected areas

Roy, Pijush Pal and Sawmliana, C. and Prakash, Amar and Singh, Rakesh Kumar (2020) Safe exploitation of developed pillars of a coalseam above fire affected areas – a case study. Mining Technology . ISSN 0026-5276

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Abstract

t was an extremely challenging task from the safety standpoint to exploit the developed coal pillars in No. 15 top and bottom seams at the Tata Steel Ltd Sijua Colliery by deep-hole opencast blasting above ﬁre aﬀected areas in No. 13 seam and No. 14 seam and a depillaring panel in No. 10 seam. The danger was that the depillaring operations in No. 10seam could cause subsidence on the ﬂoor of the opencast workings and that the ground vibrations generated due to opencast blasting could destabilize the underground ﬁre areas and cause structural damage to isolation stoppings in No. 13 and 14 seams. The scientiﬁc approach proposed by the authors may make it possible to extract the locked-up coal without jeopardizing the safety of the ﬁre aﬀected and depillared panels

Item Type:	Article
Uncontrolled Keywords:	Fire area; isolation stoppings;depillaring; opencast;subsidence; blasting;vibration; frequency; slopes;strain
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	28 Dec 2020 08:18
Last Modified:	28 Dec 2020 08:18
URI:	http://cimfr.csircentral.net/id/eprint/2289

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