ALIMAK MINING PDF
The main wire rope hoist is suitable for carrying heavy loads at relatively fast speeds and is the primary means of vertical access for men and materials in an. Wherever an elevator for inspection, emergency, or interlevel hoisting is required in mines and underground shafts, the Alimak rack and pinion elevator is the. Raise climbing, widely known as the Alimak mining method after the company that introduced it, is a variation on longhole stoping developed.
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There is often considerably less waste development with raise mining than with regular open stoping.
It is also quite common that the production holes in the raise mining method are smaller than in regular stoping, which will spread the explosive energy more minin. Ground Control Experience has shown that the stopes mined with a raise climber tend to be more stable than regular longhole open stopes.
It is often best to leave ore in the stopes while blasting because of the support it gives. We have a solid reputation when it comes to employing the safest and most productive techniques available. The short drill holes make this method very effective in narrow veins. The main wire rope hoist is suitable for carrying heavy loads at relatively fast speeds and is the primary means of vertical access for men and materials in an underground mine.
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After each round of blasting, the broken ore falls down the raise and is collected by a scooptram. The drifts are commonly sized to accommodate the large scooptrams used for production mucking and are often driven with jumbos.
Drill holes extend to alimsk less than half way nining the next raise and are oriented slightly down from horizontal. At Manroc, we have developed innovative solutions and highly specialized skills making us a leader in narrow vein exploitation. Henstridge attributes the higher cost of Alimak mining to reliance on contractors; at Williams mine, that makes it 10 per cent more expensive than longhole stoping.
Overall costs are lower, but the method also costs more to run, alikak could deter some but does not faze its proponents. In theory, and if properly cabled, the foliated hangingwall could be approximated as a laminate beam by the Voussoir approach, as described by Hutchinson and Diederichs The raise mining method takes advantage of this concept because, even though the hangingwall is only supported up its centre, the resulting two unsupported strips are long and narrow and are more likely to be self-supporting.
Faster Access to Undeveloped Ore Once the climber nests are established, ore starts to flow. They blast the first few metres of the raise and then install a climber running on a curved rail from the nest into the raise. Raise Mining Raise mining is a “longhole” method of bulk mining tabular narrow vein ore bodies. Drawpoints and Climber Nest: Raise climbing, widely known as the Alimak mining method after the company that introduced it, is a variation on longhole stoping developed for narrow-veined, tabular ore bodies.
This is very cost effective as the raise is centred in the stope, which concentrates the support where it is needed most. A new canopy design has provided more room on the climber platform. Ground support follows development and production drilling follows mininf after that.
One of the disadvantages to mining long, straight raises is that it becomes difficult to follow high-grade ore. Review our range of underground mining services below.
Less Cost With less development, faster ore access, better ground control, and faster qlimak mining, it is easy to see how raise mining will cost less than regular open stoping. Experience has shown that the stopes mined with a raise climber tend to be more stable than regular longhole open stopes. This improves drill accuracy which, in conjunction with the better ground control, reduces dilution substantially.
Most of the rest of the development is in ore see centerfold.
Alimak Production Mining, mine engineering, Alimak Raising, Lateral Development, Narrow Vein Mining
Recognized as a leader in Alimak LH narrow vein stope mining, Manroc has developed proven and effective techniques yielding high tonnage and low dilution alimwk. Raise Climber Mining Method Details The raise climber mining method will generally be comprised of the following steps: Prospects good for long term copper price, despite current volatility Lack of major copper discoveries mean supply will likely fall short of demand in next decade.
Allison Henstridge, engineering superintendent at the Williams mine, says the Alimak stopes produce higher tonnages: The climber nests are always in the hangingwall. Greg Dipple of UBC has discovered that certain mine tailings can be used for carbon sequestration, and the implications could be enormous. There are several explanations, which include: In regular open stoping, overcuts and undercuts provide access alikak the ore along strike.
Our longhole stopes are approximately 5, to 10, tonnes, whereas the Alimak stopes are anywhere from 20, to 30, tonnes. Raise climbing brings production gains to Canadian companies. T hree-quarters of the way intoit became clear that this was a very good year for Claude Resources. The climber holds two to three people and the drilling and blasting equipment they need. The down dip helps the toes break to the stope wall.