Nabiullah,, M. and Pingua, B.M.P and jagdish, Dr. (2010) Study on optimum powder factor and quality of explosives in surface mines. Indian Mining & Engineering Journal , 49 (4). pp. 22-30. ISSN 0019-5944

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Abstract

Bulk explosives, booster and blast design play an important role in rock blasting. Bulk explosives are booster sensitive explosives. The firing density is in range of 1.05 to 1.20/cm3. The velocity of detonation and absolute weight strength (AWS) is in range of 3500 to 4500m/s and 800 to 850kcal/kg. Powder factor is an important economic index for assessment of blastabiliy of rock. The optimum powder factor for any surface mines is depends upon various factors such as geology of rock, blast design, explosive energy output and its utilization. The optimum powder factor in most of mines in CIL was recorded. The powder factor in NCL, BCCL, SECL, ECL, WCL and West Bokaro Collieries was in range of the optimum powder factor and quality of explosives was measured. The rating index of bulk explosives is varied in between 70 and 100. The powder factor in hard rock was 1.5 to 2.5m3/kg and in soft rock it was in range of 2.0to 3.m3/kg.

Item Type:	Article
Subjects:	Explosive Research
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	19 Dec 2011 07:13
Last Modified:	19 Dec 2011 07:13
URI:	http://cimfr.csircentral.net/id/eprint/411

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