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In Situ Leaching and Solution Mining: Evaluation of State of the Art. Appendix 3--Fracturing and Rubblization.

D'andrea DV; Ursenbach WO; Wells HM; Winzer SR

For Reference Only At Bureau Libraries :79 pages

10004604

Present knowledge of explosive applications is inadequate for extrapolation into in situ mining environments. Lack of scientific understanding and description of the fundamental mechanisms of rock fracture under explosive loading and of the propagation of high- energy impulses through rock makes design impossible of computer and other sophisticated models to simulate the process. Explosives and initiation systems available today are too imprecise to allow the kind of millisecond control of timing that will be necessary to execute cost-effective, confined in situ blasts. The major problem is enhancement of permeability at depth. To sustain an economically viable operation, adequate, well-distributed permeability in rock at depth is necessary for solutions to circulate directly to ore minerals for rapid chemical kinetics. A summary of the state of the art of fracturing and rubblization is presented.

19830101

CP; Final Contract Report;

1983

OFR 64(5)-85

WO;

For Reference Only At Bureau Libraries

UT;

Univ. of Utah Research Inst.