Fitch Ratings-Chicago-24 July 2019: 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. However, CRU expects block caves to account for more than a fifth of the …
Rio Tinto has repeatedly said the underground expansion is its most important growth project. Once completed, Oyu Tolgoi will churn out 480,000 tonnes of copper a year from 2028 to 2036. It is ...
I am currently working for Oyu Tolgoi underground mine.I am driven by the opportunities to learn and grow and make a difference. · Experience: Oyu Tolgoi LLC / Оюу толгой ХХК · Location: Ulaanbaatar Hot · 500+ connections on LinkedIn. View Mungunshagai B.'s profile on LinkedIn, a professional community of 1 billion members.
Rio Tinto, Turquoise Hill Resources (TRQ) and the Government of Mongolia have reached an agreement that will move the Oyu Tolgoi (OT) project forward, resetting the relationship between the partners and increasing the value the project delivers for Mongolia.
Oyu Tolgoi consists of a series of deposits containing copper, gold, and silver. The deposits stretch over 12 km, from the Hugo Dummett North Zone in the north through the adjacent Hugo Dummett South Zone, down to the Oyut Deposit, extending to the Heruga Deposit in the south. Over 80 per cent of Oyu Tolgoi's potential lies underground.
Rio is planning to use a technique called block caving to extract the copper ore and send it to the surface at Oyu Tolgoi.
The Oyu Tolgoi copper and gold project is located in the Southern Gobi region of Mongolia and is being developed by Oyu Tolgoi LLC a company held by Rio Tinto and the Govern-ment of Mongolia. The project consists of a series of deposits containing copper, gold, silver and molybdenum, located along a structural corridor that is over 26 km long.
In a statement, Rio said the new design for the underground mine confirmed its caving method remains valid, and "will unlock the most valuable part of Oyu Tolgoi".
However, the bulk of the ore is to be extracted extracted from the underground reserves through the mining method known as block caving. In January this year, the Oyu Tolgoi Board gave the green light for underground operations to begin and sustainable underground production is expected in the first half of 2023.
Oyu Tolgoi LLC estimates that 80% of the mine's value is beneath the surface. It plans to access this haul using block caving techniques, which involves digging tunnels under the deposits and using explosives to disperse the rock, which falls down into a lower level and is transported to the surface. Tunnels constructed over the life of the ...
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. This …
Rio Tinto began underground production at its giant Oyu Tolgoi copper mine in Mongolia's Gobi Desert on Monday. The US$7 billion underground expansion project, which will be the fourth-largest copper mine in the world by 2030, got the green light in January 2022 after Rio Tinto settled a dispute with the Mongolian government over …
At the Oyu Tolgoi operation, which is expected to deliver about half a million tonnes of copper annually by 2028, making it the fourth-biggest copper mine in the world, the company says block ...
The Oyu Tolgoi Project's Hugo Dummett Mine was designed to extract the deep copper/gold porphyry deposit by block caving methods across an operating life exceeding 40 years. Our role in Mongolia was to help Ivanhoe mines realize their production targets by providing engineering, design, procurement, and quality assurance for Shafts No. 1 and …
An array of monitoring equipment allowed for close monitoring of the cave back. These data and the subsequently interpreted cave shapes were used to calculate ratios of cave height (in meters) to height of draw (in meters), referred to as a cave ratio.
Oyu Tolgoi is a large Cu-Au porphyry deposit in the south Gobi desert, Mongolia. The first of several deep, large-diameter, concrete-lined shafts, Shaft 1, is nearing completion. It will have a finished depth of 1380 m at a diameter of 6.7 m. These shafts will provide access to and hoisting capacity for block caving of deep underground ore. …
Oyu Tolgoi consists of a number of ore deposits that contain copper, gold and silver, with over 80 percent of the total value of Oyu Tolgoi being underground. The plan is to develop an underground mining complex in which the ore is extracted using the Block Caving mining technology and transported to the surface for processing. 31 kms of lateral …
The Oyu Tolgoi mine is expanding underground to exploit the Hugo North deposit, one of several large-scale orebodies of the Oyu Tolgoi complex. The Hugo North deposit extends over 900 m vertically, from 500 to -400 MASL (670 m below the surface to 1,570 m below the surface), and is approximately 1,800 m long and 500 m wide.
The underground project at Oyu Tolgoi and the block caving mining method. (Image: Turquoise Hill Resources)
Additionally, plasticity models have been used to predict and compare the measured isolated extracted and movement zones from scaled models for block caving [14].
In order to bring these resources into the economic circulation, block caving technology is being used from today at the Oyu Tolgoi underground mine.
The Oyu Tolgoi Project's Hugo Dummett Mine was designed to extract the deep copper/gold porphyry deposit by block caving methods across an operating life exceeding 40 years.
Even more exciting is that, based on OTLLC's 2020 Oyu Tolgoi Feasibility Study, first Lift 1 development production on the Entrée/Oyu Tolgoi JV Property is expected to commence in 2022.
The underground expansion of the Oyu Tolgoi mine is one of Rio's most important projects and will increase its production of copper, at a time when the shift to renewable energy is driving ...
Oyu Tolgoi is an underground block cave in the initial development stage, where rapid development, yet comprehensive, ground support is required to begin undercutting and start production. High variability in the rock mass, high stress and deep mining requires various ground support standards and sequences to provide initial stability during development …
The Oyu Tolgoi project, being developed by Oyu Tolgoi LLC, located in the South Gobi desert of Mongolia ranks among the world's largest copper-gold mines.
Media. Oyu Tolgoi commences its underground production. After years of continuous achievements, we are pleased to announce the commencement of production of our underground mine. This mine holds the majority of the total reserves of the Oyu Tolgoi deposits, so an underground mine has been constructed with cutting-edge technology, …
Oyu Tolgoi is an underground block cave in the initial development stage, where rapid development, yet comprehensive, ground support is required to begin undercutting and start production. High variability in the rock mass, high stress and deep mining requires various ground support standards and sequences to provide initial stability during development …
Oyu Tolgoi, a copper and gold mine in Mongolia, is one of the deepest and largest block cave mines in the world. The depth and size, combined with demanding rock conditions, brings new technical and operational challenges in providing effective geotechnical risk management. At Oyu Tolgoi, Rio Tinto has partnered with Palantir Technologies, the …
Oyu Tolgoi copper and gold mine in the southern Mongolia holds mineral resources that make it one of the largest known copper and gold deposits in the world. The project is operating an open pit mine on the near surface of Southern Oyu deposit and developing underground block-caving mine at the Hugo Dummet North where 80 per cent of total …
Caving 2018: Proceedings of the Fourth International Symposium on Block and Sublevel Caving, Caving 2018. 2018. Hormazabal, E; Alvarez, R; Russo, A; Acevedo, D. Influence of the undercut height on the behaviour of pillars at the extraction level in block and panel caving operations.
The Canadian miner's shares have sunk to historic lows in August on news that production from the vast Oyu Tolgoi copper-gold-silver mine in Mongolia could be delayed 16 to 30 months from the ...
An Overview of Oyu Tolgoi Phase 2 Mining Plans and some of the issues and risks associated with block cave underground mining, international metal price uncertainty, project power supply, and impacts on water resources used by herders
About Us. About Us. Oyu Tolgoi is a copper mine in the Umnugovi aimag of Mongolia, approximately 550 kilometres south of the capital Ulaanbaatar. It holds one of the largest high-grade copper deposits in the world. …
The present manuscript summarized the growing technology in managing the block caving method based on existing block cave mines projects in all countries. The discussions of the transformation and potency of block caving in Indonesia are based on four aspects, i.e., technological advancement in block caving, geologic and tectonics analysis of ...
Digging deeper into the science. While we have some good engineering principles of design, the science of block caving optimisation hasn't really progressed much. The methodologies used in appraising cave mining were initially conceived for relatively shallow orebodies, generally occurring at depths between 200 and 800 metres …
Oyu Tolgoi is a large Cu-Au porphyry deposit in the south Gobi desert, Mongolia. The first of several deep, large-diameter, concrete-lined shafts, Shaft 1, is nearing completion. It will have a finished depth of 1380 m at a diameter of 6.7 m. These shafts will provide access to and hoisting capacity for block caving of deep underground ore._x000D_ Geotechnical …
