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Mining Publication: Technology News 436 - Stope Leaching Reduces Surface Environmental Impacts From Underground Mining
Keywords: Environmental engineering Leaching Stopes
Original creation date: May 1994
Authors: Bureau of Mines
Technology News - May 1994
Download PDF Document (0.18 MB)
NIOSHTIC2 Number: 20025289
U.S. Department of the Interior, Bureau of Mines, Technology News 436, 1994 May; :1-2
Conventional underground mining practices include excavating the ore and transporting the ore to the surface for processing. Underground mining systems handle tons of solid material to produce kilograms, and sometimes only grams, of final product. Processing of ore on the surface results in most of the excavated material remaining on the surface exposed to long-term degradation from wind and water. The underground stope leaching mining system involves applying leach solutions to mineralized rock that has been fragmented by blasting ore in place, or by backfilling empty stopes. Only enough material is removed from the underground mining area (stope) to allow for adequate expansion during the blasting. This reduces the amount of material brought to the surface by at least two-thirds. After blasting, leach solution containing chemicals and/or bacteria is circulated through the fragmented ore to dissolve the target mineral. The resulting solution containing the dissolved mineral (pregnant leach solution) is pumped to the surface where the product is removed, and the leach solution is regenerated for recycling underground.
Image of publication Technology News 436 - Stope Leaching Reduces Surface Environmental Impacts From Underground MiningTechnology News - May 1994
Download PDF Document (0.18 MB)
NIOSHTIC2 Number: 20025289
U.S. Department of the Interior, Bureau of Mines, Technology News 436, 1994 May; :1-2
See Also
Cemented Paste Backfill Geomechanics at a Narrow-Vein Underhand Cut-and-Fill Mine
Copper Exchange Capacity of Clays and Their Potential Effect on In Situ Copper Leaching
Environmental Impacts of Cemented Mine Waste Backfill
Geophysical Methods to Detect Stress in Underground Mines
In Situ Stress at the Lucky Friday Mine (In Four Parts): 2. Analysis of Overcore Measurement From 5300 Level
Numerical Modeling of Paste Sills in Underhand Cut & Fill Stopes
Rock Mechanics Investigations at the Lucky Friday Mine (In Three Parts): 2. Evaluation of Underhand Backfill Practice for Rock Burst Control
Role of Fault Slip on Mechanisms of Rock Burst Damage, Lucky Friday Mine, Idaho, USA
Underhand Cut and Fill Mining as Practiced in Three Deep Hard Rock Mines in the United States
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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