Mining - Underground mining | Britannica.com

Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground …

Mining | Britannica.com

Mining: Mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with a few exceptions, is an inorganic substance occurring in nature that has a definite chemical composition and distinctive physical properties or molecular structure. (One organic

2010 Copiapó mining accident - Wikipedia

The 2010 Copiapó mining accident, also known then as the "Chilean mining accident", began on Thursday, 5 August 2010 with a cave-in at the San José copper–gold mine, located in the Atacama Desert 45 kilometers (28 mi) north of the regional capital of Copiapó, in northern Chile.Thirty-three men, trapped 700 meters (2,300 ft) underground …

Glossary of Mining Terms - Kentucky Coal Education

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back …

Ukwazi - Mining Consultants | Mining Solutions | Mine ...

Who we are Ukwazi is a Zulu word which means “to know”, and this aptly describes the nature of our business. As a specialist mining consultancy, what we know makes us the ideal technical partner for mining studies, independent advice, judgement, and decision-making recommendations.

Carlson Software - Drill Grade

Carlson Drill Grade System Get All-Weather Assistance with Drilling & Blasting for both Mining & Construction. Carlson Drill Grade System Uses the Latest in Global Navigation Satellite System (GNSS) Technology The features and benefits of Carlson Software's Drill Grade System© in

Mining Overview - Citigold

Location Citigold's Charters Towers goldfield is located surrounding the town of Charters Towers (8,500 population) in north eastern Queensland, Australia.

Classified Ads for GoldAndSilverMines.com

Free Classified Advertising for Miners. Classified advertising on the GoldAndSilverMines.com website is a great place to sell or locate used mining equipment, find qualified help, or look for work in the mining indistry.

Gold Mine Operations - Citigold

Mining Method Mining operations at Charters Towers are by underground mining methods. The gold deposits are hosted in very strong granodiorite rock that has a compressive strength of 300 MPa or five times stronger than commercial grade concrete.

Caterpillar Booth - MINExpo 2012 | Mining University

Caterpillar really stole the show at MINExpo 2012. What follows is a photo journal of what I saw at the Cat booth. I think I got a picture of everything and it …

Glossary of Mining Terms - rocksandminerals.com

Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock or vein material containing no minerals of value, and of strata without coal, or containing coal in seams too thin to be workable. Barricading — Enclosing part of a mine to prevent …

MINING - CoinMine

MINING . This page primarily focuses on metallurgical mining, though many of the terms, processes, and concepts are the same within the …

Aveng Moolmans | Aveng Mining

Aveng Moolmans is one of the largest surface mining contractors in Africa, moving over 20 million tonnes of material each month. Experience in operating in remote and challenging locations, together with extensive resources, ensures delivery of a world-class mining service.

Aveng Moolmans

Moolmans organisation, began open pit mining in the late 1970's. Today our company is a major force in surface and underground mining in Africa.

Drilling rig - Wikipedia

A drilling rig is a machine that creates holes in the earth subsurface. Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells, or they can be small enough to be moved manually by one person and such are called augers.Drilling rigs can sample subsurface mineral deposits, test …

Redpath Mining | Mining Contractors and Engineers

Consider it done. In 1962, Jim Redpath’s vision for the company was much the same as it is today; offering a high level of service to the mining industry, which exceeds current standards and provides challenge for its employees.

Rock Drills | Furukawa Co.,Ltd.

We manufacture and distribute a wide range of products including tunnel drill jumbos which have been used for drilling a number of road and rail tunnels in the mountains, hydraulic breakers used for rock and concrete structure demolition, and crawler drills used to drill rock in civil engineering projects and open pit mining.

Old Timers proven mining claims and projects for sale ot ...

GoldAndSilverMines.com lists choice proven mining and mineral properties for sale worldwide. We specialize in gold mines, silver mines, copper mines, and a wide variety of industrial minerals as well. It is our desire to assist both buyers and sellers to secure a deal that makes everyone happy. Buy, Sell, Lease, or Browse.

Sandvik Mining and Rock Technology - YouTube

Sandvik Mining and Rock Technology is a leading supplier of equipment and tools, service and technical solutions for mining and rock excavation.

Mining & Construction online

MAXAM supplements its machinery park and optimises drilling and blasting works using the stat-of-the-art Atlas Copco drill rigs equipped in HNS (Hole Navigation System).