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Resolution Copper estimates the 64 billion mining project would run over 60 years. Investment. Through 2012 Resolution Copper had invested almost a billion dollars in the Superior project, and planned a 6 billion investment to develop the mine, if the Federal land exchange is approved.
Block mining methods . Block caving is used to mine massive steeply dipping orebodies (typically low grade) with high friability. An undercut with haulage access is driven under the orebody, with "drawbells" excavated between the top of the haulage level and the bottom of the undercut. The drawbells serve as a place for caving rock to fall into.
this case, block caving gets the attention of mining engineers. At present, block caving has already got application in many mines across the world including America, Chile, South Africa, the Philippines, Canada, Australia, China, etc [3]. Among the 50 mines with block caving, Teniente mine in Chile has the largest production output of 140000t/d.
The term ''block caving'' probably originated in the porphyry copper mines, where the area to be mined was divided into rectangular blocks that were mined in a checkerboard sequence with all the ore in a block being removed before an adjacent block was mined. This sequence of mining is .
A look at the underground mining process The Resolution Copper deposit lies more than a mile beneath the surface. The most viable way to recover this ore body is by going underground, using a process called block caving. Block caving is a proven mining method using advanced technologies. Here''s how it works. Ore, rock containing . Continued
Bulkmining methods are a necessary component of economically mining massive, lowgrade porphyry copper, gold, molybdenum and diamond deposits, and block caving is the method of choice.
This Information Circular describes the development of blockcaving methods and practices by the Miami Copper Co. at the Miami mine in Gila County, Arizona. It is one of a series published by the Bureau of Mines on mining methods, practices, and costs in various mining districts of .
of cave mining (continued) Cave mining principles and economics Traditionally, cave mining was a method based on the principle of undercutting rock and then naturally letting it cave. However, this mining method has been extended to very strong rocks which would not easily cave or would not be suitable for caving due to very coarse fragmentation.
Nov 08, 2012· Resolution Copper will use the panel caving mining method, a variation of block caving to break up the underground ore. This technique uses gravity primarily to break the rock. Panel caving is ...
Rio Tinto Mine Delay Shows Block Caving, Copper Supply Risk. The delay and higher than expected cost of Rio Tinto''s Oyu Tolgoi mine project highlights the risks associated with block caving, an underground hard rock mining method, which could have implications for copper supply and pricing, says Fitch Ratings.
Cave Mining CuAu Porphyry. There are over 45 cave mining projects in various stages of studies and development around the world. Cave mining methods will be the underground method of choice in the future. It is only relatively recent that this mass mining method, despite 70 years of use, has begun proving its potential.
In underground mining, block caving is the only method with the costs comparable to surface mining methods, especially open pit mining. A switch from open pit mining to block caving mining could ...
The first part of the plan is for traditional openpit mining to reach the deposits near the surface. Block caving, which has been well proven at mines around the world, may be the answer to reaching the deeper deposits as the second part of the extraction plan (for more on block caving.
Block caving is employed principally for mining lowgrade ores where the inevitable loss of some ore and some dilution with capping and wall rock are permissible and where mining must be done on a large scale and at a lower cost than can be obtained by the use of supportedstope or other selective mining .
The underground mine is a block caving operation, the first such system to be used in metal mining in South Africa. With the introduction of the underground operation, the output of ore has fallen from the 82,000t/d achieved in the previous open pit to 30,000t/d.
Block caving is an underground mining method that uses gravity to exploit massive, steeply dipping ore bodies located at depth. These ore bodies are generally low grade in nature and are too deep to be extracted through open pit mining. The technique is commonly used to extract low grade copper, coppergold, iron and molybdenum ores although ...
Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight. It is the underground version of open pit mining. In block caving, a large section of rock is undercut, creating an artificial cavern that fills with its own rubble as it collapses.
Dec 01, 2018· In the right conditions, the advantages of block caving make it an alternative that is now being considered more often. Block cave mining is an underground mass mining method that allows for the bulk extraction of large, relatively lower grade ore deposits with substantial vertical dimension.
Since Block Caving is a fairly new method of mining, do we know how many mines in the world are currently using block caving? Also, do we know how many future mines are developing this method? I know that Resolution Copper in Superior Arizona is working to start this up. Oyu Tolgoi will use this method with one of their ore deposits.
Dec 24, 2013· This computer animation looks at how block caving is built and mined. Northparkes was the first mine in Australia to use the block cave mining process. xxxx.
Mar 10, 2015· visited Chile''s El Teniente mine, the world''s largest underground copper operation and the sixth biggest copper mine by reserve size.
Block caving is a largescale underground mining method applicable to the extraction of lowgrade, massive ore bodies. With the amount of literature available on block caving this report identifies the need to provide a simple understanding of the process.
Jul 25, 2018· Block caving is a new alternative method of developing new mines or extending the operation of open pits. Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight. It is the underground version of open pit mining.
a| "This IC describes the development of blockcaving methods and practices by the Miami Copper Co. at the Miami mine in Gila County, Arizona. It is one of a series published by the Bureau of Mines on mining methods, practices, and costs in various mining districts of the United States."
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