Table of Contents
What is sublevel stoping in mining?
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 type of minerals are extracted with surface mining methods?
Surface mining accounts for two thirds of the world’s solid minerals, and is predominantly used in obtaining sand, gravel, crushed stone, phosphates, coal, copper, iron and aluminum… There are 5 main types of surface mining, which are used in various degrees and for different resources.
What are the methods of extracting minerals?
How do we extract minerals?
- Underground mining.
- Surface (open pit) mining.
- Placer mining.
What are the four methods of extraction of minerals?
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.
What is meant by stoping in mining?
stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore. Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving.
What is shrinkage stoping mining method?
A vertical, overhand mining method whereby most of the broken ore remains in the stope to form a working floor for the miners. Another reason for leaving the broken ore in the stope is to provide additional wall support until the stope is completed and ready for drawdown.
What is mineral extraction?
Definitions of mineral extraction. crushing and separating ore into valuable substances or waste by any of a variety of techniques. synonyms: beneficiation, mineral dressing, mineral processing, ore dressing, ore processing. type of: extraction.
What category of mining would be used to extract ore that is close to the surface Why?
Surface mining allows extraction of ores that are close to Earth’s surface. Overlying rock is blasted and the rock that contains the valuable minerals is placed in a truck and taken to a refinery. As pictured in Figure below, surface mining includes open-pit mining and mountaintop removal.
Which minerals are extracted by drilling?
Petroleum and natural gas occur far below the earth’s surface. These minerals are taken out with a drilling rig. Minerals that lie near the surface are simply dug out, by the process known as quarrying.
What are the 3 types of mining methods?
- Open Cut. Open cut (or open pit) mining involves digging and/or drilling and blasting to remove the resource or ore for processing.
- Dredge mining.
- Decline or tunnel.
- Block cave.
- Continuous Mining.
- Longwall Mining.
- Coal Seam Gas (CSG)
What is sublevel caving?
Sublevel caving (SLC) is a mass mining method in which the ore is drilled and blasted while the waste rock caves and fills the space created by the extraction of ore (Cokayne 1982. The ore body is divided into vertical intervals called sublevel intervals.
What sort of process is stoping geology?
Stoping is a process accommodating the ascent of magmatic bodies from their sources in the mantle or lower crust to the surface. The theory was independently developed by Canadian geologist Reginald Aldworth Daly and American geologist Joseph Barrell.
How much can a sublevel stoping mine produce?
The production for a mine using sublevel stoping can range from 15- 40 tons/employee-shift, while one stope can produce greater than 25000 tons per month. In general this method is fairly safe as the mining tends to retreat away from previously mined or unsupported areas.
How is upper stope extracted in dlsos mining system?
The upper stope in the inter-sublevel rectangular stoping block is extracted after mining and backfilling the lower stope. Mining of the upper stope requires mining through backfill in the lower stope in the proposed DLSOS mining system. To do this safely, the mining is done in two mining steps.
Which is the best ore body for sublevel stoping?
Ore bodies that are ideal for sublevel stoping are very tall and have a medium to narrow width, but can have an extensive length. The ideal width of the orebody should be greater than 6 meters but less than 30 meters.
When do you use sublevel caving in mining?
Sublevel caving. Sublevel Caving is one of the most advanced mining methods. This method is usually undertaken when mining the orebody through an open pit is no longer economically viable. In Sublevel Caving, mining starts at the top of the orebody and develops downwards. Ore is mined from sublevels spaced at regular intervals throughout