You are on page 1of 2 Search inside document Alimak Raising Written by Brennan Lang Wednesday, 02 September - Last revised Saturday, 29 August Raise climbers,commonly known as Alimak raise climbers after the company that first introduced them in , are used to drive vertical or inclined raises in underground development and mining operations. Raises up to metres are possible with this method, but practically, raises less than m are more common. The method of excavation has been used successfully on many project applications, including ore and waste pass raises, ventilation shafts and airways, main shaft excavating, communication shafts and materials handling shafts. Air motors driven climbers are normally used to drive short raises.
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Dikinos Once the climber nests are established, ore starts to flow. Truck dump back slash if required. This improves drill accuracy which, in conjunction with the better ground control, reduces dilution substantially. Access a collection of Canadian resources on all aspects of English and French, including quizzes. For more information on our Alimak production mining services, please contact us.
Backfill Fill fence and piping if required. This should also contribute to a more stable hangingwall. Cables can be installed right up the middle of the hangingwall, where they will do the most good.
The Alimak Method consists of five steps which together make up a cycle. Drawpoints can be driven from either footwall or hangingwall, depending on how climbrr ore zone is accessed. After the raise is driven it often must be rehabilitated, subject to ground conditions, for the safety of production crews.
We are your preferred underground mining professionals. Specialists in Alimak Raising The hydraulic radius is defined as the cross-sectional area of the opening divided by its perimeter. Drilling, loading and blasting are all performed from the platform of the Raise Climber, which is adapted to fit the precise dimensions and shape of the raise. Experience has shown that raises from 75 to metres length are the most economical.
Fill fence and piping if required. Using curved guide rails the direction of travel can be changed at any time; forward, backward, or sideways. This type of mining is best suited to tabular narrow vein ore bodies with enough dip for gravity ore zlimak. Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies. Raises must be driven big enough that a 2.
Alimak Raising, Manroc Developments Inc. Boxholes, raises at degrees and ore passes. 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 There are several explanations, which include:. The down dip helps the toes break to the stope wall.
The platform can be any shape and size. These drifts are driven from the shaft or established mining areas to the new ore zone. The Raise Climber serves both as working platform and as a means of transport up to the work face.
In which subject field? Language Portal of Canada Access a collection of Canadian resources on all aspects of English and French, including quizzes. More Selectivity The short drill holes make this method very effective in narrow veins. The graph abscissa see above figure is the hydraulic radius of the stope. The machine, equipped with rack-and-pinion drive, travels along a guide rail and monorail with pinion rack, which are bolted to the hangingwall by expansion bolts.
Specifications HS CODE Features Alimak Raise Climbers and shaft enlarging equipment are available for underground mining, civil engineering and hydro-electric power generation as well as for operating as inter-level service lifts.
This is very cost effective as the raise is centred in the stope, which concentrates the support where it is needed most. The production drill sits in the middle of its work, cutting the drilled length in half. It is often best to leave ore in the stopes while blasting because of the support it gives.
It is safest to take a few rings per blast, so that miss-holes or other blasting problems are accessible for correction. With some exceptions, production blasting can start in the quarter after raise development starts. 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. The graph ordinate is an estimate of the rock stability and includes factors for block size, joint surface condition, rock strength, joint orientation and the effect of gravity.
Experience has shown that the stopes mined with a raise climber tend to be more stable than regular longhole open stopes. How It Works The Alimak method raises between levels in a safe and effective manner.
The method works best if the ore boundaries can be interpolated between adjacent raises. Penstocks of around m. The blasts are timed to slash down, with the footwall holes often the last to fire. TOP Related Posts.
Alimak Raise Climber at Iron King Branch of Shattuck Denn Mining Corporation
Dikinos Once the climber nests are established, ore starts to flow. Truck dump back slash if required. This improves drill accuracy which, in conjunction with the better ground control, reduces dilution substantially. Access a collection of Canadian resources on all aspects of English and French, including quizzes.
ALIMAK RAISE CLIMBER PDF
In order to fully understand the advantages of the Alimak Raise Climber, it is necessary first to describe the basic machine; second, a complete cycle of a raise round; and third, the comparative speed and economy afforded the Iron King operation by using this new method of raise driving: The raise climber consists of a drilling platform that is raised and lowered by two 6. These worm gears drive pinions which grip the guide rail rack. The worm gears are fitted with spring-loaded couplings so that a small rock or grit in the rack is passed over without disturbing the mesh between the rack and the other pinions. The rack is incorporated into the right side of the guide rail just behind the front steel plate. The rack consists of 19mm diameter pins set 27 pins to the meter. Between each pin a hole is cut in the front plate to facilitate cleaning. The guide rail comes in lengths of 20 inches, 3 ft.