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The Design and Cost of a Fragmentation System for in Situ Extraction of Copper.

Selim-AA; Yardley-DH
Proc 14 Symp Appl of Computer Methods in the Min Ind 10/4-8/76 AIME New York PP 792-807 :792-807
A computer model was developed to calculate the fragmentation cost for in situ leaching operations as a function of the blast design and deposit parameters. The model is based on blasting an ore zone only or an ore zone plus overburden by either a coyote blast or a vertical blasthole system. The model calculates the blast design parameters and the fragmentation cost based either on a user input powder factor value or on a powder factor calculated by the model as a function of the overburden height and the ore zone thickness. Examples of blast design parameters calculated by the model are the number and spacing of blastholes for a vertical blasthole system and the number and spacing of crosscuts for a coyote system. The model also calculates the total amount of explosives, the detonating cord length, and the number of primers. The cost of blasthole drilling can be calculated by the model based either on purchasing and operating a drill or on a user input value of the contracted cost of drilling.
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OP 88-77
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Proc. 14 Symp Appl of Computer Methods in the Min. Ind., 10/4-8/76, AIME, New York, PP. 792-807