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Some considerations in the design of blasts for in situ copper leaching.
D'andrea-DV; Larson-WC; Chamberlain-PG; Olson-JJ
Rock Mech Appl in Mng Soc Min Eng AIME New York Mono 1 Sec 5 Ch 24 PP 201-204 :201-204
Blasts designed for in situ copper leaching must produce adequate fragmentation and permeability for successful leaching. Copper recovery depends to a large extent on the particle size distribution created by the blast, the permeability in the blast-fractured zone, and the ability to maintain solution flow with a minimum amount of channeling. This paper presents the results of Bureau of Mines experiments where core drilling was used before and after blasting to establish the degree of fragmentation. Data are presented from tests at the Emerald Isle Mine of El Paso Mining and Milling Company. Copper recovery is predicted from fragment size distribution data using a computer model. Data from several blasts are used to show how predicted copper recovery is related to powder factor.
OP; Journal Article
Rock Mechanics and Rock Engineering