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TitleExplosives and Blasting in Open Cast
File Size233.5 KB
Total Pages17
Table of Contents
                            EXPLOSIVES AND BLASTING (OPENCAST)
Density of ANFO
	
		
			
				
P
	Where
		
			
				Cc 	= Cost of Crushing
		Instantaneous Blasts :  In multirow blast where no delays in the surface hookup. All boreholes detonate more or less simultane
		Row Delay :  In this method, individual rows in a blast are delayed in a sequence, (figure) so that the front row fires first
		V, V1, V2 Patterns : These Pattern are far superior, to row delays. These result in superior fragmentation due to reduce hole
		The best available pattern is one where the holes are drilled (staggered) on a equilateral triangle pattern. This in a drilled
Type of Structure
                        

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