As a Quarry Manager you are required to design a blast system to produce 50,000 tonnes/blast of rock using the NONEL ini

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As A Quarry Manager You Are Required To Design A Blast System To Produce 50 000 Tonnes Blast Of Rock Using The Nonel Ini 1 (131.96 KiB) Viewed 40 times

As a Quarry Manager you are required to design a blast system to produce 50,000 tonnes/blast of rock using the NONEL initiation system. You need to design a minimum 4 rows of holes per blast. The rock type is granite, with a blast diameter of 3 inches and explosives type of bulk. The design must comprise with necessary assumptions or reason in the followings: The blast design i.e., depth, burden, spacing, sub drill, number of holes, number of rows, bench height ratio. Amount of rock and explosives (high explosive and blasting agent), the powder factor and blast The degree of fragmentation based on the powder factor chosen Illustrate the blast sequence in which that no any two holes have a timing of less than 8 ms if the blast is design to initiated at: Starting near the end In the middle Comments which design are the best suit with the above conditions. i) ii)