sublevel stoping

sublevel stoping

[¦səb′lev·əl ′stōp·iŋ]
(mining engineering)
A mining method involving overhand, underhand, and shrinkage stoping; the characteristic feature is the use of sublevels which are worked simultaneously, the lowest on a given block being farthest advanced and the sublevels above following one another at short intervals.
References in periodicals archive ?
70% of our production is achieved through sublevel stoping, as opposed to 30% before [.
This method was first proposed by the CSIRO a decade ago as an alternative to sublevel stoping.
AMEC believes the preferred concept for mining the Blue River Deposit is by underground methods using variations of sublevel stoping under a conceptual scenario that considers mining and processing at a rate of 7,500 tonnes per day.
The Kvannevann iron oxide mine in Northern Norway is currently using sublevel stoping system (SLS) to extract the hematite / magnetite ore.
After modifying the mining sequence at Turmalina, while maintaining the sublevel stoping mining method, dilution has diminished significantly and run-of-mine grades are in-line with the mine plan.
Chanda and Katongal note that with VCR, "improvements in grade factors, recoveries and control of dilution are clearly evident compared to conventional sublevel stoping previously employed.
Sublevel stoping was reviewed by E Villaescusa, [28] considering the factors controlling stope wall behaviour such as excavation geometry, rockmass strength, induced stress, ground support, blast damage and drill drive layout.
3, according to the company, has been used at more than two dozen projects ranging from development drilling for block caving and sublevel stoping operations, to commercial tunneling applications.
Slot raises are an important element of sublevel stoping operations, often necessary to create a free face for blasting.
At present, the last of the reserves are being extracted from the main orebody at Pyhasalmi, mainly by sublevel stoping and bench cut-and-fill.