What is longhole open stoping?
What is longhole open stoping?
Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing. It encompasses advantage of Faster Stope Production Start leading to early return on investment.
What is sub level stoping?
Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom of the mine. Before mining begins, an ore pass is usually drilled from a lower to a higher elevation.
What is open stoping?
In mines where the rock requires no artificial support, the operation is known as open stoping. A common open-stoping method is room-and-pillar mining, in which pillars of ore are left standing to support the rock over a flat-lying ore body.
What is longitudinal stoping?
Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. It is a branch of longhole mining differing from Transverse longhole stoping, where the long axis of the stope is perpendicular to the strike of the orebody.
What is the difference between stoping and stopping?
As nouns the difference between stoping and stopping is that stoping is in mining, the removal of the desired ore from an underground mine leaving behind an open space known as a stope while stopping is the act of something that stops; a halt.
What instrument shrinkage stops?
Jackleg drills that are capable of drilling approximately 2.6 m (8 ft) cut are used as the primary drilling tool in shrinkage stoping scenarios. The holes are loaded and shot. The haulage then takes place with a mini-scoop loading out of the drawpoint into a truck or to an ore pass to the ultimate level.
What is blasting gallery method?
Blasting gallery (BG) method is the appropriate method for the extraction of thick seams up to a thickness of 8 – 11 metres.Mining by BG method produces about 1000 T/day with 85 % of extraction. Earlier experiment. • The 1st BG Panel was started in the country at East Katras colliery in Jharia Coal fields (BCCL) in …
What is horizontal drift?
All horizontal or subhorizontal development openings made in a mine have the generic name of drift. These are simply tunnels made in the rock, with a size and shape depending on their use—for example, haulage, ventilation, or exploration.
What is the difference between raise and Winze?
A winze is a minor connection between different levels in a mine. When worked upwards from a lower level it is usually called a raise; when sunk downward from a higher level it may be called a sump. The top of a winze is located underground and it is not equipped with winding gear.
What are the 4 main methods of mining?
There are four main mining methods: underground, open surface (pit), placer, and in-situ mining.
- Underground mines are more expensive and are often used to reach deeper deposits.
- Surface mines are typically used for more shallow and less valuable deposits.
Is stoping a word?
noun Geology. a process by which magmas move upward in the earth by breaking off and engulfing blocks of overlying rocks.
What is the synonym of stopping?
verb. halt, cease, conclude, cut short, desist, discontinue, end, finish, pause, put an end to, quit, refrain, shut down, terminate. prevent, arrest, forestall, hinder, hold back, impede, repress, restrain. plug, block, obstruct, seal, staunch, stem. stay, lodge, rest.
What do you need to know about sublevel stoping?
Sublevel Stoping Considerations on the method: the sublevel stoping is considered a method of extracting medium to large scale; other names for the method (variations): bighole open stoping, long-hole stoping or blasthole Prof. Dr. H.Z. Harraz Presentation sublevel stoping 3 Conditions…
What are the sublevel open stopes in mining?
Sublevel open stoping: design of the O640, L651 and N 659 sub level open stopes in the 3000 orebod y of the Mount Isa copper mines, Queensland, Australia. Department of Mining, University of Pretoria. devices. internal void of the stope. production.
When to use drift or sublevel open stope?
Here, only the drift to be the sublevel open stope when working on; using parallel drilling (drilling parallel) production, with holes of large diameter (up to 7.5 “) and greater length. Should open a horizontal slot for positioning the drill.
What is the slot in sublevel stoping 14?
Dr. H.Z. Harraz Presentation sublevel stoping 14 Slot initial Slot: is a space for the expansion of the rock where the extraction begins in the conventional stope sublevel. The slot will the level of the roof of the stope extraction. It is opened from a slot raise and can be executed in various ways (conventional raising, raise boring.).