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.

Mountaintop Removal 101 > Appalachian Voices

Mountaintop removal is any method of surface coal mining that destroys a mountaintop or ridgeline, whether or not the mined area will be returned to what is legally described as the "approximate original contour." Methods of mountaintop removal coal mining include, but are not limited to: cross ...

Glossary of Mining Terms - rocksandminerals.com

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 abutment, that is, the settled packs behind the face.

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 abutment, that is, the settled packs behind the face.

Dictionary - Survey, Boundary, Mapping, Mining - Elliott ...

C-Survey, Mining, Mapping Terms and Definitions Elliott Surveying- New Mexico- 505-280-6729 - [email protected]/A CODE- (GPS)- A binary code known by Civilian/Access.

Office of Surface Mining - Official Site

The U.S. Government's Official Website for the Office of Surface Mining Reclamation and Enforcement (OSMRE). OSMRE's business practices are to reclaim abandoned mine lands (Title IV), regulate active coal mines (Title V), and apply sound science through technology transfer.

Mining University

Mining opinions from a Professional Engineer. The National Mining Association recently came out with an infographic on rare earth elements and their place in modern society.

Careers | ALLETE, Inc.

ALLETE delivers affordable, reliable energy services in the Upper Midwest, owns a lignite mine in North Dakota and has investments in real estate and the America Transmission Co.

Pennsylvania Code

(c) For surface coal mine facilities, coal refuse reprocessing facilities and coal mining activity facilities, except for bituminous underground mines, permit application fees collected will be deposited in the Surface Mining Conservation and Reclamation Fund.

What is Deep-Seabed Mining? - Deep Sea Conservation Coalition

Deep seabed mining is the extension of terrestrial and shallow-water mining activities in the deep ocean in the quest for minerals. It requires new technologies and approaches and new scientific knowledge, most of which have yet to be acquired and developed.

Trump signs bill undoing Obama coal mining rule | TheHill

President Trump on Thursday signed legislation ending a key Obama administration coal mining rule. The bill quashes the Office of Surface Mining's Stream Protection Rule, a regulation to protect ...

Mining - Wikipedia

Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposit.These deposits form a mineralized package that is of economic interest to the miner.

Plundering Appalachia - The Tragedy of Mountaintop-Removal ...

The most profitable way to decapitate a mountain. Blow its top off, section by section, and then move the rubble with heavy equipment.

ALLUVIAL DIAMOND MINING FACT SHEET

FOR MEDIA USE ALLUVIAL DIAMOND MINING FACT SHEET What are alluvial diamonds? Alluvial diamonds is the term used to describe diamonds that have been removed from the

Mining MarketWatch Journal

Mining MarketWatch Journal review. The backstory on Goliath Resources Limited . The Founder, President & CEO of Goliath Resources is Roger Rosmus, MBA.

Surface mining - Wikipedia

Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.

Surface Mining Techniques used in the Oil Sands

Surface mining is defined as the extraction of ore from an open pit or burrow. Surface mining is sometimes known as open-pit, open-cut or open-cast mining and is only commercially viable if the deposit is located relative close to the surface.  Less than 20% of Alberta's bitumen reserves

Glossary of Mining Terminology - Glace Bay

Glossary of Mining Terminology After Damp - Gasses resulting from underground combustion, normally carbon monoxide. This is a loose term implying any fatal gas in a mine after an explosion or fire.

Types of Gemstone Mining Methods | Gemstone Buzz

The methods used in the mining of gem materials are many, from native mining to highly technical methods.

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.