A Test Blast for in Situ Copper Leaching.
D'andrea-DV; Chamberlain-PG; Ahlness-JK
Pres At 1978 :6 pages
The Bureau of Mines and Cyprus Mines Corp. conducted a cooperative research program to investigate the in situ leaching potential of copper ore along the fringes of the open pit Johnson Mine near Willcox, Arizona. A test blast was detonated in August, 1977 to evaluate blast design, solution flow rate, and solution containment. Thirteen 9 7/8-inch-diameter blastholes were spaced 14 feet apart and drilled to depths ranging from 185 to 224 feet. A total of 51,500 pounds of anfo was detonated with an average of 56 feet of stemming in each hole. Core drilling, permeability testing, and water circulation tests were used to evaluate the results of the blast.
Pres. At 1978 Ann. Mtg., SME, AIME, Denver, Colorado, Feb. 28-Mar. 2, 1978, SME Preprint 78-As-112