Stoping


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stoping

[′stō·pər]
(geology)
magnetic stoping

Stoping

 

operations for the extraction of a mineral from a deposit by the underground method. In stoping, a distinction is drawn between combined or gross removal of a mineral and selective removal, in which certain grades of ores, coal, intercalated rock layers, and so on are extracted separately. Mining excavations formed as a result of stoping, and also the space formed after the removal of the mineral, are called stopes; the faces of stoping excavations are called working faces. Rock minerals are stoped with the use of a blast-hole drilling unit for preliminary loosening of the rock mass.

In the USSR, stoping is mechanized: cutter loaders, conveyors, and powered support are used in underground coal mining; loaders, scrapers, and underground excavators are used in underground ore extraction.

References in periodicals archive ?
Mr Baird said Focus has developed two levels at The Mount, where stoping operations have now commenced.
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.
The stoping methods are classified according to two geotechnical areas as follows:
The last cut in the pit is highly profitable while the first production from underground is the most costly because it will take months to develop the sequence of stoping required to meet full production capacity.
Cemented rockfill is used in primary stoping blocks and uncemented rockfill in secondary stope blocks.
The drilling, drifting, mapping, sampling and trial stoping operations on the 100 metre, 150 metre and 200 metre levels have shown that the structure and nature of the Clavos mineralization is more complex than inititially indicated.
An underground mine will be based on long-hole stoping and cemented paste backfill.
It should be noted that, if an open stoping method is used, an enormous opening is created.
Underground work included 7,317 drilled meters and 17,000 tonnes of trial stoping (sublevel stoping mining method).
The company planned to begin stoping on the 244- and 305-m levels, following the completion of the commissioning phase.
The major problem has been the high level of waste dilution resulting from overbreak and sidewall sloughing associated with the relatively narrow sub-level open stoping mining method initially adopted.
An initial 50 foot length of stope undercut has been completed on the 800 level Peter vein stoping block.