Pal Roy, P. and Singh, M.M. and Mandal, S.K (2002) Economic Method of Conducting Optimum Blasts in Limestone Mines. SME Transactions , 312.

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Abstract

Field investigations have revealed that sawdust can be used as an efficient additive to ANFO for carrying out production blasts in limestone mines. Sawdust can be used at a reasonably reduced cost without sacrificing fragmentation, muck profile and wall control. Such additives lower the detonation pressure of ANFO by acting as low-grade fuel that reacts or burns more slowly in the presence of ammonium nitrate than does fuel oil. On detonation, it eventually forms near-ideal oxygen balance that helps in liberating maximum energy to break the surrounding rock. It also forms a low-density stable mixture that helps in reducing loading density (kg/m) of explosive in the blasthole. Experiments performed at the Hirmi Limestone mine, M/s L&T, and at the Lambasta Limestone mine, M/s Jaypee Rewa Cements, showed the novel acceptance of the technique in a highly competitive market where cost reduction has been a major area of thrust.

Item Type:	Article
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	27 Feb 2012 12:37
Last Modified:	14 Jul 2012 11:10
URI:	http://cimfr.csircentral.net/id/eprint/995

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