Raina, A.K. and Ramulu, M. and Choudhury , P.B. and Kumar, A and Chakraborty, A.K. (2008) Application of digital image analysis technique for assessment of blast fragmentation and explosives energy uitlisation in a large opencast coal mine. Journal of Mines, Metals & Fuels, 56 (7&8). pp. 140-147. ISSN 0022-2755

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Abstract

A good and optimum fragmentation is one of the primary criteria of blasting in mines. This governs other unit operation like loading, transportation and thus the total cost of mining. Many rock mass parameters as well as blast design parameters control the fragmentation. Models have been developed to predict mean fragmentation and uniformity including the influencing parameters. Digital image analysis technique with analytical software is one of the latest and easy to use tools to measure the fragmentation in large muck piles. Fragalyst3.0 software has been extensively used in PK-OCII mine of SCCL to assess the fragmentation distribution and energy utilization in 21 blasts. It was revealed that though the maximum size of the fragments hardly exceeded the permissible one, the mean fragment size was predominantly out of the optimum range inviting modifications in the blast design. Further, the explosives energy utilizations assessed in different blasts could be well related with the pre- and post-blast fragmentation.

Item Type:	Article
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	23 Dec 2011 05:07
Last Modified:	23 Dec 2011 05:07
URI:	http://cimfr.csircentral.net/id/eprint/454

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