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Modeling in situ copper leaching in an unsaturated setting.

Authors
Friedel-MJ
Source
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9386, 1991 Jan; :1-22
Link
NIOSHTIC No.
10010989
Abstract
The permeability and flow capacity in unsaturated media were investigated by the U.S. Bureau of Mines for application to in situ copper leach mining. Moisture retention properties were derived and combined with scanning electron microprobe data to characterize the mineralogy, texture, pore size, distribution, and permeability of the host rock. Finite-element modeling was used to derive a saturated permeability and ambient degree of saturation and to assess various injection-recovery schemes. Recommended design modifications for optimization of solution distribution and maximum recovery from the rock matrix require either (1) injection pressures on the order of 1,500 psi and recovery wells operating in a suction mode or (2) performing permeability enhancement through in situ rubbling. Injection pressures can be reduced to 500 psi with improved recovery and containment of solutions.
Keywords
Injection-wells; Permeability; Porous-materials; Containment; Finite-element-method; Mathematical-models; Leaching; Materials-recovery; Copper-ores; Mining
Publication Date
19910101
Document Type
IH; Report of Investigations
Fiscal Year
1991
NTIS Accession No.
PB92157502
NTIS Price
A03
Identifying No.
RI-9386
NIOSH Division
TCRC
Source Name
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9386
State
MN
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