Raina, A.K. and Chakraborty, A.K. and Choudhury , P.B. and Ramulu, , M. and Udpikar , V. and Sinha, A.
(2009)
Fragalyst 3.0: An indigenous fragmentation assessment tool based on digital image analysis – application and analysis.
Journal of Mines, Metals & Fuels, , 57 (3&4).
pp. 83-88.
ISSN 0022-2755
Abstract
Fragalyst 3.0 is an advanced version of the Fragalyst 2.0 developed indigenously by CIMFR and Wavelet Group Pune. The software has multiple functions where the digital images of blasted fragments can be analysed for size distributions (BBSD) and the in situ block size distribution (IBSD)can also be determined using the joint frequencies in a blast face. The software then uses the Bond;s index to determine the explosive energy utilisation in a blast. initially an image of the face is to be imported and joints determined by using a scanline method which in turn determines the IBSD. Once blast is carried out on the same face sufficient number of images (at least 15) need to be imported in the software and analysed for fragmentation distribution. Several options of image enhancement, resize and crop are also available along with a large combination of threshold parameters which makes edge detection easy. The detected edges of fragments can be edited using advanced tools. The analysis of all the individual images is then called for a merged analysis of the blasted fragment size distribution (BBSD). A fines correction option is now available for correcting the BBSD for fines. The area between the BBSD and IBSD curves determines the explosive energy utilised in the blast. The software results have been compared to the results obtained with imported software and results are conforming. The software has been tested at number of sites in India and significant changes in productivity have been reported. There are some advanced features included in the software such as shape factor, spherocity and other distributions of blasted fragments, distance measurements and angle calculations which can be useful to an inquisitive researcher. The paper details the capabilities of Fragalyst 3.0 along with few applications and respective analysis.
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