Raise climbing, widely known as the Alimak mining method after the company that introduced it, is a variation on longhole stoping developed. Hard Rock Selective Mining. Methods. • Room and Pillar. • Cut and Fill. • Shrinkage. • Alimak Mining. • Raise bore and Box hole Mining. Maxwell Adombila Akalaare 22 September Golden Star Resources (GSR) has sealed a three-year deal with Canadian mining contractor.
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He said that Manroc was selected after a competitive bidding process that involved three companies. Manroc has worked with major mining firms around the world, and has built a solid reputation. With better ground control, larger stopes can be taken. The climber nests are always in the hangingwall. After each round of blasting, the broken ore falls down the raise and is collected by a scooptram.
Tinkering with the drill rig set-up allowed an entire ring of production holes to be drilled without repositioning the drill more than once. Beauvais spent seven or eight years developing the mining technique and enhancing the equipment before founding Minrail in The holes are most often mechanically loaded with either ANFO or an emulsion explosive.
Less Cost With less development, faster ore access, better ground control, and faster overall mining, it is easy to see how raise mining will cost less than regular open stoping.
Raise climbing, widely known as the Alimak mining method after the company that introduced it, is a variation on minibg stoping developed for narrow-veined, tabular ore bodies. Our longhole stopes are approximately 5, to 10, tonnes, whereas the Alimak stopes are anywhere from 20, to 30, tonnes. Stopes can be as little as 3 feet thick, or even less in ideal circumstances. Williams had expanded its Alimak production several years earlier with the help of narrow vein specialists Manroc Developments Inc.
It is better if the ore body is continuous over several hundred feet vertically. For more information on our Alimak production mining services, please contact us.
Alimak Production Mining, Manroc Developments Inc.
Now a typical Alimak stope is 80 or 90 metres high and mucked more often — an improvement for grade and scheduling. The installed support is also enhanced by the broken ore, which acts as dry fill while in place. These drifts are also driven from the shaft or existing development but, unless there is another lift, they often need only be large enough for the movement of supplies. The advantages of this mining method are: The Alimak mining method, which Manroc prides itself as the inventor, uses an Alimak raise climber to develop a raise in the ore body followed by drilling production holes in the ore body and blasting.
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. The stopes can also be mined in a shrinkage fashion, with added support gained from the broken ore in place. There are several explanations, which include:. Where required, the stope hangingwall can be supported with deformed strand resin-grouted cable bolts in a regular pattern along the raise.
The climbers require about 4. The drifts are commonly sized to accommodate the large scooptrams used for production mucking and are often driven with jumbos.
Steelmaking coal price surge reinvigorates Canadian mines Kylie Williams. Raise mining is a “longhole” method of bulk mining tabular narrow vein ore bodies. It allows Maroc the opportunity to share its Alimak expertise with staff of Golden Star Resources while training them to take over from it on a progressive basis during the contract period.
Successful users of the technique have found that it accelerates their path to production by centring development work within the ore body.
SAMS is designed for orebodies up to 6 metres thick to be mined in one pass. This type of mining is best suited to tabular narrow vein ore bodies with enough dip for gravity ore flow. It was minung on care and maintenance by Golden Star, while evaluation and exploration activities continued. At Manroc, we have developed innovative solutions and highly specialized skills making us a leader in narrow vein exploitation.
Manroc, Williams and Orica Ltd.
Specialized Services Professional Mine Engineering Manroc Developments is a full service mine engineering company employing a highly qualified team of mining engineers and associates with extensive experience in underground mining. All of the equipment is electric and modular. Eliminating the intervening levels cuts out a good chunk of lateral development time and spending. Manroc Developments is a full service mine engineering company employing a highly qualified team of mining engineers and associates with extensive experience in underground mining.
So although the need to install infrastructure adds to development time initially, it reduces development time overall because of its greater productivity, Beauvais says. Review our range of underground mining services below.
The down dip helps the toes break to the stope wall. Intuitively, geometry favors raise climber mining, in that access is gained to the centre of the stope hangingwall where the ground support does the most good. Teck installs first production-scale machine learning system Machine learning predicts when trucks will need maintenance at Fording River coal mine.
Fill fence and piping if required.
Golden Star, Manroc Dev’t agree on Alimak mining method
Beauvais says the technology is a cousin of the Alimak Climber, developed in the s, which similarly works on alimsk monorail mounted on the ceiling. Canmet representatives spent time observing SAMS in use and interviewed mine workers about their experience using the system. It was in production throughout the 20th century on an intermittent basis and has historically produced in excess of nine million ounces. Committed to safety and excellence, Manroc is at the forefront of Alimak mining, generating safer and more productive methods.
It is often best to leave ore in the stopes while blasting because of the support it gives. Other improvements have focused on the climber end. Stope stability decreases with increasing hydraulic radius, so it can be deduced that a long thin alimam will be more stable than a squat opening of the same area, with all else remaining equal.
Raise Mining Alumak mining is a “longhole” method of bulk mining tabular narrow vein ore bodies.
Typically, the angle results in slow development, low productivity and difficult work flow.