to mine horizontal gold reefs

Quartz reef mining - WikipediaQuartz reef mining played an important role in 19th Century gold-mining districts such as . the reefs, sometimes deep underground. Horizontal tunnels called drifts were dug out from the shaft at different levels to find the gold-bearing mine horizontal gold reefs,The top ten deepest mines in the world - Mining TechnologySep 11, 2013 . The mine exploits the gold contained reefs at a depth of more than 3.7km. . comprises of twin vertical and twin sub-vertical shaft systems.

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to mine horizontal gold reefs

Quartz Reef Mining, Mining Techniques, Surface Mining, Gold .

The removal of gold ore from these tough quartz veins was traditionally referred to . Horizontal tunnels known as drives were dug out from the shaft at dissimilar.

South Deep Gold Mine - Gold Fields

Dec 31, 2012 . Gold Fields – South Deep Gold Mine – Technical Short Form Report 2012 □ ... VCR occurs as a single reef horizon that overlies footwall.

Definitions - This is GOLD

Horizontal or inclined excavations allowing access to stopes or a mine's workings. . Amount of gold contained in a fixed amount of reef, generally measured in.

Blanket Gold Mine - Caledonia Mining Corporation

Early workers tended to mine the visible gold sections of the pay shoots, i.e. pick . Near vertical shear zones are developed throughout the belt and are the loci of . The ore shoots vary in shape from the tabular to lensoidal quartz reefs to the.

Google Answers: Deep Reef Mine Automation

South African gold mines are an example of this type of mining. .. applicable to reef gold mining operations now or in the future: Vertical Mine.

Underground Mining Methods and Applications

Adit: Horizontal or nearly horizontal entrance to a mine. Back: Roof or overhead ... The gold reef conglomerates are very hard and difficult to mine. South African.

New Gold-Drilling Technology: Shale-Drilling Redux?

Mar 17, 2014 . . new reef-boring technology and whether it may revitalize the gold mining . Before the implementation of hydraulic fracturing and horizontal.

mining - Underground mining | Britannica

Sep 27, 2011 . At regular intervals along the shaft, horizontal openings called drifts are ... In hard rocks, such as the gold- and platinum-bearing reefs of South.

Copper Reef Mining Corporation - Albert's Lake - Gold - Sat Feb 4 .

The 2011 exploration project at Alberts Lake Gold Deposit comprises of . Copper Reef Mining Corporation drilled four twin holes: Al-40, Al-57, Al-61, and . by the following criteria: The horizontal width of 40m would only allow mining to about.

Reef Gold and Hard Rock Mining | Australian Gold, History & Culture .

The quartz reefs that had eroded, supplied the alluvial gold that fuelled the gold rush. The rest of . The drives were horizontal and level with the stamp battery.

South African Gold Reef Geology

. Farm near Johannesburg. Cutaway of the multi-layered gold bearing reefs of the Witwatersrand (Credit: courtesy The Chamber of Mines of South Africa) . 10, Magnetic Horizon in in lower Jeppestown shale. 11, Buffelsdoorn (Outer Basin.

Mining Technology: Overview - Electronic Encyclopedia of Gold in .

A long, horizontal wooden pole was attached to the post by an iron pin and a . Quartz reef mining proved to be the most widely practised extraction method.

Minerals | Gold

Gold. . Auriferous quartz veins, known as reefs or lodes, which are typically . 30o north – northeasterly with associated narrow, sub-vertical high grade veins. . Mining of reef deposits began in 1900 and the goldfield grew to become the.

Mafic dikes displacing Witwatersrand gold reefs: Evidence . - Geology

Horizontal map of small part of Kopanang mine, emphasizing depth variations of Vaal Reef below surface by variable colors. Breaks in color gradients show that.

Mining induced stress changes in a South African gold mine .

Jan 30, 2015 . The Mponeng gold mine is located near Carletonville 70 km southwest of . (sub-vertical, red) and tilted gold reef (sub-horizontal, 26° dip SSE).

to mine horizontal gold reefs,

A borehole radar system for South African gold and platinum mines

properties between the host and the target horizon. . gold reefs: thin, gently dipping seams of very large . In both types of reef, gold and platinum, mining is.

Gold mining - Te Ara

Dec 15, 2010 . Most Coromandel gold was locked up in quartz reefs, unlike in the South Island where a lot of gold was alluvial – found in rivers and easily.

to mine horizontal gold reefs,

The Platinum Group Element Deposits of the Bushveld Complex in .

Demonstrated reserves and resources published by mining companies make . However, mining of the Witwatersrand gold reefs has progressed to a depth of 4 km. . The PGE mineralisation is distributed over vertical intervals that can reach.

Lecture 4: Underground Mining - SlideShare

Nov 2, 2011 . A large stope in the Treadwell gold mine 6) Long-hole Stoping6.1) ... [1] A common method of mining such vertical ore bodies is stull stoping. ... or the reef, the bed of quartz pebbles exploited by gold mines in South Africa).

Mafic dikes displacing Witwatersrand gold reefs: Evidence against .

Despite a long mining history, the process of gold emplacement .. in color gradients show that originally planar reef horizon is cut into numerous blocks that are.

The Ones to Watch - Schlumberger

May 2, 2015 . for horizontal infrastructure develop- ment . 10. Mining Magazine's top 10 technologies to watch .. seams such as platinum and gold reefs,.

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