accessing a gold deposit using decline shaft

accessing a gold deposit using decline shaft. accessing a gold deposit using decline shaft Underground mining (hard rock) - Wikipedia, the free encyclopedia A three dimensional model of an underground mine with shaft access. ... deposit or circles around the deposit.

Decline design in underground mines using constrained …

mines such as gold, silver, lead, zinc, copper or multi-metal deposits where the orebodies are discrete and which are mined by stoping or caving methods. The access infrastructure of an underground mine can be viewed as a network of interconnected declines and shafts that provides access to designated orebodies and a means

History of mining in Chile - Wikipedia

During most of Chile's history, from 1500 to the present, mining has been an important economic activity. 16th century mining was oriented towards the exploitation of gold placer deposits using encomienda labour. After a period of decline in the 17th century mining resurged in the 18th and early 19th century this time revolving chiefly around silver. ...

What are two disadvantages of deep shaft mining in ...

May 18, 2019· We go for deep shaft mining when the deposit lies at a greater depth or when mining through opencast method has reached the economical pit limit i.e. it is no longer profitable to mine through open cast system. A few disadvantages of deep shaft sy...

Gwalia Gold Mine ~ Mining Geology

Jun 04, 2015· Brief History of the Gwalia Gold Mine: ... •1897 to 1963 -Underground mining of the Sons of Gwalia gold deposit with shaft access to depths of 1.08 km •1984 to 1999 –Mined as an open pit •1998 to 2003 –Remnant underground mining of upper levels using hanging wall decline access


MINE DEVELOPMENT – ACCESS TO DEPOSIT S.M. Rupprecht University of Johannesburg Abstract A deposit to be mined by underground methods can be accessed by a number of methods: • Adit • Decline or ramp • Inclined shaft • Vertical shaft. Adits are an economical approach when the orebody is above the general floor

Kirkland Lake Gold - Our Business - Canada - Holt Complex

Unlike other quartz vein hosted deposits in the region, native gold at the Holt Mine occurs as very fine grains spatially associated with pyrite, typically located in fractures, on grain boundaries, or encapsulated in pyrite grains. Zone thickness can widen from less than 10 metres to locally more than 50 metres.

Dillenger #1 Claim - GOLD OUT WEST

Gold Mining Claim Dillenger Arizona. The Dillenger #1 placer mining claim is located in the NE 1/4 of Section 12, Township 10 North, Range 17 West on lands administered by the BLM (Bureau of Land Management). The corners are well flagged and marked with metal tags, designating the claim corner and the name of the claim and date located (as required by the State of Arizona).

Deposit access mode -

A cost-effective capital programme to extend the lives of the existing shaft systems and to develop new shafts to enable access to reserves was initiated in 1993. The first phase of this includes the development of a series of five decline shaft systems below the current third generation vertical shafts and a vertical shaft link with No 12 shaft.

Citigold - Gold Mine Operations | Citigold Corporation

The next commercial gold production area is the Central mine. Citigold has substantial development works in the Central mine area including a 238 metre deep production size decline, two ventilation shafts, power, workshops, etc. This mine is planned to resume going deeper and commence commercial gold …


Accessing underground ore can be achieved via a decline (ramp), inclined vertical shaft or adit. * Declines can be a spiral tunnel which circles either the flank of the deposit or circles around the deposit. The decline begins with a box cut, which is the portal to the surface.


releasing large quantities of sediment that can impact surface water for several miles downstream of the placer mine. Underground mining In underground mining, a minimal amount of overburden is removed to gain access to the ore deposit. Access to this ore deposit is gained by tunnels or shafts. Tunnels or shafts lead to a more

Mining Terminology - Hawkeye Gold & Diamond Inc.

A cross-cut is a horizontal underground passageway that provides access to mining operations and is usually bored from the mining shaft at near right angles to the strike of a vein or orebody. ... It is a company at a phase of activity ranging from confirmation of a mineral deposit to the decision to build a mine. ... For example, gold can be ...

Casa Berardi mine, Canada - Mining Weekly

The Casa Berardi gold deposit can be classified as an Archean sedimentary-hosted lode gold deposit. ... a 380 m deep shaft, a decline and a series of ramp-connected levels. ... of the West mine ...


The Company's plan for the Burnstone Project is to access the gold-bearing Kimberley Reefprimarily by means of a decline while extraction of ore and waste will occurvia a shallow vertical shaft. Great Basin has undertaken the decline shaft using employees instead of …

High Grade Gold at Nuggetty Reef Mine No. of Pages: 8

Oct 19, 2012· High Grade Gold at Nuggetty Reef Mine High grade gold up to 48.4g/t Au in underground sampling at the Nuggetty Reef Mine, Maldon, in Victoria 92Shares on issue: metre long drive averages 4.8g/t Au in unmined reef and 4.1 g/t Au in the unmined walls Results include: 33 metres averaging 8.2g/t Au (roof of drive)

High Potential Targets Identified at Oaxaca Gold Project

The company's recent efforts at Magdalena included mapping and sampling 277 rock chip samples. Using 58 of the samples, it mapped a 300 by 285 meter area of surface gold mineralization whose grades exceeded 0.2 grams per ton (0.2 g/t). Two samples were of grades higher than 3 g/t gold, and 12 contained grades above 1 g/t gold.

Unit 16 Mine Development - Mining and Blasting

After completing this unit, you should be able to: • Explain the methods of "opening a deposit" • Lists the steps of shaft sinking • Lists the type of shafts • Big Hole Drilling • Ground Freezing • Shaft Linings • Lateral Development & Ramps • Track versus Trackless • Design and function of Lateral Headings • Laser Control • Raises

Underground mining (hard rock) - Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques …

Description of Deposit -

DESCRIPTION OF THE MINING OPERATION. The deposit is accessed by a four-compartment shaft of 835 m (2740 ft) deep. The levels are spaced every 60 m (197 ft). At the beginning of the mining operation, cut-and-fill stoping was mainly used, followed by shrinkage stoping and some areas were mined using room-and-pillar stoping.

Barrick Gold Corporation - Operations - Exploration & Projects

We have one of the deepest project pipelines in the gold industry, including brownfield projects near existing operations, greenfield exploration discoveries and some of the largest undeveloped gold deposits in the world, providing significant optionality and leverage to gold prices.