The Alimak raising method consists of five steps, which together make up a cycle. The five steps are all dependent on the Raise Climber, which. ALIMAK INC. – Alimak Raise Climber. Operating height (m): . Operating width (m): Platform dimensions: m x m. Maximum length. In underground mining, a raise refers to a vertical or inclined excavation that leads from one level, or drift, to another. A raise may also extend to surface. There are four excavation methods for raises: Conventional or open raise; Long- hole or drop raise; Alimak · Raise boring.
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Contact Us For more information on Manroc’s Alimak raising services, please contact us. The advantages of this mining method are: The climber nests are always in the hangingwall.
Stopes can be as little as 3 feet thick, or even less in ideal circumstances. This step will be included if the stope is in an area that requires fill and the fill method requires a fence. Drill holes extend to just less than half way to the next raise and are oriented slightly down from horizontal. Backfill Fill fence and piping if required. The drifts are commonly sized to accommodate the large scooptrams used for production mucking and are often driven with jumbos.
ALIMAK INC. – Alimak Raise Climber
How It Works The Alimak method raises between levels in a safe and effective manner. It is safest to take a few rings per blast, so that miss-holes or other blasting problems are accessible for correction.
Less Dilution Akimak production drill sits in the middle of its work, cutting the drilled length in half. For more information on Manroc’s Alimak raising services, please contact us. Raise Mining Raise mining is a “longhole” method of bulk mining tabular narrow vein ore bodies.
Alimak Raise Climber – Buy Raise Climber Product on
For more information climbsr our Alimak production mining services, please contact us. We can assist you with all your underground mining requirements. 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. 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.
The blasts are timed to slash down, with the footwall holes climbsr the last to fire. This final step should be done in such a way that concerns about adjacent stope stability and hydraulic heads are addressed satisfactorily. Ore passes and ventilation shafts totalling m.
We are your preferred underground mining professionals. Regardless of the length of the shaft, the Raise Climber will end up at the right spot as its alignment in the shaft can be adjusted continuously according to laser readings. A true innovation in underground mining, the Alimak method provides the highest safety standards in the industry, while increasing productivity, adding greater flexibility and maneuverability, and reducing overall mining costs.
After the raise alimsk driven it often must be rehabilitated, subject to ground zlimak, for the safety of production crews.
Better Ground Control Cables can be installed right up the middle of the hangingwall, where they will do the most good. The platform can be any shape and size. A narrow vein ore body has less ore to soak up waste development costs, making the raise mining method an obvious choice. Alimak machines are in operation throughout the world, developing ore passes, ventilation shafts, main shafts, and others, at various inclinations and lengths.
The short drill holes make this method very effective in narrow veins. Inclined pressure shafts totalling Raises must be driven big enough that a 2. Where required, the stope hangingwall can be supported with deformed strand resin-grouted cable bolts in a regular pattern along the raise.
The change in geometry and improvement in ground support allows stope heights in the order of 75 to metres, eliminating many sub-levels and their associated development. There are several explanations, which include: Experience has shown that raises from 75 to metres length are the most economical.
This is very cost effective as the raise is centred in climer stope, which concentrates the support where it is needed most.
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The production drill holes are oriented slightly down from along strike, which is also roughly perpendicular to that found in the regular open stoping method. With some exceptions, production blasting can start in the quarter after raise development starts.
This allows the drill planning to be done before the production drill is set up in the raise. The Alimak method yields high tonnage and low dilution results, while reducing mining costs. Since its introduction, the Raise Climber has been developed and improved into what is now the 6th generation, the Alimak RCM-series, enabling fast, mechanized drilling of long, inclined shafts and improved working environment.
Most of the rest of the development is in ore see centerfold. The holes are most often mechanically loaded with either ANFO or an emulsion explosive. A ramp is not required and, in many cases, neither is the muck pass and ventilation raise of a regular stoping system. Gallery Click on the photos below for a larger view: Mining Equipment and Tools .
It is better if the ore body is continuous over several hundred feet vertically. FAQ Frequently asked questions Display options. Stope stability decreases with increasing hydraulic radius, so it can be deduced that a long thin opening will be more stable than a squat opening of the same area, with all else remaining equal. Our Commitment Manroc Developments Inc.
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 five steps of a cycle are Drilling, which is done from the platform of the Raise Climber.
Pressure shafts totalling m. Boxholes, raises at degrees and ore passes. Fill fence and piping if required. The method works best if the ore boundaries can be interpolated between adjacent raises. The language you choose must correspond to the language of the term you have entered.