Application of Shotcrete for Ground Support at Inco Minesby D. M. Morrison, INCO Ltd,
F. Beaudry, INCO Ltd,
Abstract: In 1989, shotcrete was first successfully introduced for ground support in production areas at Frood Mine. Until then the only successful application of shotcrete had been in major permanent excavations such as underground hoistrooms or crusher stations. Since the initial trials at Frood Mine, shotcrete has been introduced in at least four other mines in the Ontario Division, either to control poor rock conditions in low stress environments or to control moderate rockbursting. At the present time the dry-mix process is the most commonly used technique although some mines with ramp access are using the wet mix process. The shotcrete is always steel reinforced, almost exclusively by welded-wire mesh and there are no immediate plans for the widespread introduction of steel fibre for reinforcing. While shotcrete was initially introduced as a secondary support system, the most recent trials have been using shotcrete as the primary means of ground support.
Subject Headings: Shotcrete | Mines and mining | Steel fibers | Underground structures | Hoisting | Rocks | Excavation | North America | Ontario | Canada
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