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DEC MINE DESIGN & MINE SCHEDULING COURSES!!

For those who don't have the software but would like exposure to mine design and scheduling, and fully understand the life of mine cycle. The courses are presented at the university of Pretoria, 10 to 14 December. CPD points also awarded for professionally registered persons. Kindly visit our website for course details: "www.schoolofrockmining.com/upcoming-course-details"

MINING METHOD OF THE WEEK - SUBLEVEL STOPING!!

This method is really a combination of several different methods of stoping. The figure is an illustration of the method, and shows half of the vein cut away where the stoping is being done. The miners go from the haulage level up the raise into the sublevels. On the first sublevel they will blast into the shape of funnels the raises that come up from the haulage level, and after working back, the slice, s, by breast stoping will drill holes at a and shoot part of this bench down into the raises. On the second sublevel the miners work back the slice, s, and then with down holes at b will blast the remainder of the first bench down into the raises, and with uppers at c shoot off part of the s

MINING ROCKSTAR OF THE WEEK - BERYL!!

Beryl is a relatively rare silicate mineral with a chemical composition of Be3Al2Si6O18. It is found in igneous and metamorphic rocks in many parts of the world. Beryl has served as a minor ore of beryllium, and color varieties of the mineral are among the world’s most popular gemstones. Emerald, aquamarine, heliodor, and morganite are the most well-known varieties of beryl - "Geology.com".

SHOWCASE COPPER MINE OF THE WEEK - GRASBERG MINE

Grasberg mine in the Papua province of Indonesia ranked as the world’s tenth largest copper mine by reserve. The mine’s open pit and underground copper reserves as of December 2012 were estimated at 10.47Mt. The mine produced 315,246t of copper in 2012. Grasberg was also the biggest gold mine in the world by reserve. The Grasberg mineral deposit was discovered in 1988. Open-pit mining operation started in 1990. PTFI holds a 90.64% interest in the Grasberg mining operation. The Government of Indonesia holds the rest, representing a 9.36% stake. Freeport Indonesia (PTFI), a subsidiary of Freeport-McMoRan (FCX), operates the mine. Rio Tinto sold it's 40% stake in July 2018.

MINERAL PROCESSING METHOD OF THE WEEK - DRYING!!

The removal of water from solid materials by thermal drying plays a significant role in modern mineral processing. A great number of dryer types are available. Convection dryers, employing a flow of hot combustion gases to remove moisture from a pulp stream, are the most common. To this type belong rotary drum, conveyor, and fluidized-bed dryers - Encyclopedia Britannica.

WORLD'S BIGGEST FRONT-END LOADERS - KOMATSU WA900!!

With a bucket capacity of 11.5m³ to 13m³ and operating weight of 107.3t, the Komatsu WA900-3E0 wheel loader with 856hp (638kW) engine is the world’s eighth biggest front-end loader. The WA900-3E0 in high-lift boom configuration offers 17.3ft of dump clearance and 7.4ft of dumping reach. The operating height of the loader in fully raised condition is 32.5ft, while the overall length with bucket on the ground is 48.2ft - Mining Technology.

MINING METHOD OF THE WEEK - SIDE STOPING AND BREAST STOPING!!

Side stoping is an extreme of combination stoping in which the working face of the stope is vertical. The face is parallel to the raises just as the face in flat-back stoping is parallel to the levels. Breast stoping refers to the working of a flat orebody, or a flat section of an orebody, just as coal is mined from a flat coal seam. That is, a slice is worked in a horizontal direction. The assumption is that there is no open stope either above or below the slice, or else the method becomes either underhand or overhand stoping. In some cases the benches in underhand or overhand stoping are called breasts, and the method breast stoping, but I believe that is not the usually accepted definitio

ONLINE MINING COURSE FOR SCHOLARS, NON-GRADUATES OR DIPLOMATS!!

Don't have a university degree or diploma, but want to further your career in mining and hit that next promotion...? Don't have the means to travel to a far-off location to complete a mining course...? Or maybe you're a scholar and want to study Mining one day, but you have no clue what Mining is about...? Then consider the Mining for Non-miners course. The course was developed by the friendly people at RPMGlobal, one of the global leaders in mine planning software. The guys at RPMGlobal used their incredible breadth of knowledge to develop an on-line course, that is available for 365 days once downloaded. The course covers the whole mining industry spectrum from geology, mine planning, min

MINING ROCKSTAR OF THE WEEK - BENITOITE!!

Benitoite is an extremely rare mineral that is best known for being the official state gemstone of California. It is a barium titanium silicate mineral, usually blue in color, that is found in rocks that have been altered by hydrothermal metamorphism. Its chemical composition is BaTi(Si3O9). Benitoite’s identification and original description was based upon specimens found in the headwaters of the San Benito River, in San Benito County, California, from which it received its name. Small amounts of benitoite have also been found at other locations in California, Arkansas, Montana, Australia, Czech Republic, Japan, and Romania. The only location where gem-quality material has been found is in

SHOWCASE MINE OF THE WEEK - JUBILEE DIAMOND MINE!!

Jubilee, also known as the Yubileyny diamond mine, located in Sakha (Yakutia), Republic of Russia, is the biggest diamond mine in the world. The mine was estimated to contain more than 153 million carats (Mct) of recoverable diamonds, including 51Mct of probable underground reserves as of January 2013. The open-pit diamond mine is owned and operated by the Aikhal mining and processing division of Russia’s state-owned diamond company Alrosa. The mine has been in production since 1986. It extracts diamond ore from the Yubileynaya kimberlite pipe, which was estimated to contain Joint Ore Reserves Committee (JORC)-compliant probable reserves of 107.163 million tonnes (Mt) grading 0.90 carat per

MINERAL PROCESSING METHOD OF THE WEEK - THICKENING!!

In the process of thickening (also called sedimentation), the solids in a suspension settle under the influence of gravity in a tank and form a thick pulp. This pulp, and the clear liquid at the top of the tank, can be removed continuously or intermittently. In comparison with filtration, thickening offers the advantage of low operation costs; on the other hand, it has the disadvantage of leaving a higher moisture content in the pulp. For this reason, the dewatering of pulps containing fine particles often involves a combination of thickening and filtration. The thickening of finely grained pulps is often aided by the use of flocculating agents - Encyclopaedia Britannica.

DEC MINE DESIGN & MINE SCHEDULING COURSES!!

For those who don't have the software but would like exposure to mine design and scheduling, and fully understand the life of mine cycle. The courses are presented at the university of Pretoria, 10 to 14 December. CPD points also awarded for professionally registered persons. Kindly visit our website for course details: "www.schoolofrockmining.com/upcoming-course-details"

WORLD'S BIGGEST FRONT-END LOADERS - CAT 992K!!

The Cat 992K, rated at nr. 9 in the world, is the latest series in Caterpillar’s 992 make front-end wheel loaders. It offers a 10.7m³ to 12.3m³ bucket capacity and is powered by 814hp (607kW) engine. Rated payload of the loader in standard lift configuration is 21,700kg. Operating weight of the Cat 992K is up to 100.6t, while the dump clearance and dumping reach are 15.1ft and 6.9ft respectively. The machine is suitable for loading operations into Caterpillar’s 775 and 777 haulage trucks of payload capacity between 164t and 190t - Mining Technology.

MINING METHOD OF THE WEEK - MINING BY COMBINATION STOPING!!

Combination stoping is a combination of underhand and overhand stoping where it is possible to keep the working face more nearly in a line parallel to the raises and perpendicular to the level. This is a distinct advantage if a stationary or shaking chute is being used to carry the ore to the level, because a large part of the face of the stope is accessible to the chute. This becomes a double advantage if a large output is required. In combination stoping development work is also reduced because levels may be driven far apart, and fewer raises are required than in simple underhand stoping - 911 Metallurgist.

MINING ROCKSTAR OF THE WEEK - BARITE!!

Barite is a mineral composed of barium sulfate (BaSO4). It receives its name from the Greek word "barys" which means "heavy." This name is in response to barite's high specific gravity of 4.5, which is exceptional for a nonmetallic mineral. The high specific gravity of barite makes it suitable for a wide range of industrial, medical, and manufacturing uses. Barite also serves as the principal ore of barium. Barite often occurs as concretions and void-filling crystals in sediments and sedimentary rocks. It is especially common as concretions and vein fillings in limestone and dolostone. Where these carbonate rock units have been heavily weathered, large accumulations of barite are sometimes f

SHOWCASE MINE OF THE WEEK - UDACHNY DIAMOND MINE!!

The Udachny diamond mine, located in the Yakutia region of Russia, ranks as the world’s second largest diamond mine by reserve size. Estimated diamond reserves at the mine exceeded 152Mct as of January 2013. The mine is owned by Alrosa and operated by its Udachny mining and processing division. The mine extracts ore from the Udachnaya Kimberlite pipe, whose JORC-compliant diamond reserves as of July 2013 were estimated at more than 120Mct, including 7.3Mct of proven reserve from the ore stockpile. Udachny is bigger than Jubilee in terms of JORC reserve estimates. The Udachnaya pipe discovered in 1955 is the largest diamond deposit in Russia. Udachny, which is one of the deepest open pit mine

MINERAL PROCESSING METHOD OF THE WEEK - FILTRATION!!

Filtration is the separation of a suspension into a solid filter cake and a liquid filtrate by passing it through a permeable filtering material. Important factors in this process are the properties of the suspension (e.g., size distribution, concentration), the properties of the filtering materials (e.g., the width and shape of pores), and the forces applied to the suspension. Filtration is carried out in gravity filters (screens, dewatering bins), in centrifugal filters (screen centrifuges), in vacuum filters (drum cell filters, disk filters), or in pressure filters (filter presses). Such devices make it possible to produce filter cakes containing 8 to 15 percent moisture - Encyclopedia Br

WORLD'S BIGGEST FRONT-END LOADERS - KOMATSU WA800!!

Komatsu’s WA800-3E0 front-end wheel loader comes with a 10m³ to 14m³ bucket capacity and is powered by 808hp (603kW) engine. The operating weight of the loader is up to 102.6t. The WA800-3E0 with high-lift boom configuration offers up to 17.1ft of dump clearance and 7.1ft of dumping reach. The operating height of the loader in fully raised condition is 31.7ft and its overall length with the bucket placed on ground is 48.3ft - Mining Technology.

DEC MINE DESIGN & MINE SCHEDULING COURSES!!

For those who don't have the software but would like exposure to mine design and scheduling, and fully understand the life of mine cycle. The courses are presented at the university of Pretoria, 10 to 14 December. CPD points also awarded for professionally registered persons. Kindly visit our website for course details: "www.schoolofrockmining.com/upcoming-course-details"

MINING METHOD OF THE WEEK - SHRINKAGE STOPING!!

Shrinkage stoping refers to any overhand method in which the stope is kept full of broken ore until it is completed. The miners stand on top of the broken ore and work at the back. As broken ore takes up more space than ore in a solid mass, about 35 to 40 per cent, of it must be drawn to leave room for working. Although shrinkage stoping is rather generally used, it would be used more if it were not for the fact that many mines are not in a condition to keep an ore reserve, but must draw the ore for the mill as fast as it is broken. The added efficiency to be obtained from the miners when working on a firm floor of ore, and not on loose lagging laid on stulls, is a very important advantage o

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