underground coal formation

  • Coal Exploration and Mining Geology

    Underground Mining 9.1 Underground Mining Methods ... Coal is a vital component of the world's energy resources, and one that is expected to fill a significant role in meeting our energy needs well into the foreseeable future. ... Coal Exploration and Mining Geology - Colin R. Ward

  • Glossary of Mining Terminology - Glace Bay

    Coal Basin - A coal field with a synclinal basin structure. Coal Bump - Sudden outbursts of coal and rock that occur when stresses in a coal pillar, left for support in underground workings, cause the pillar to rupture without warning, sending coal and rock flying with explosive force.

  • Simulation Study of Underground Coal Gasification in ...

    Underground coal gasification (UCG) as an efficient method for the conversion of the world's coal resources into energy, liquid fuels, and chemicals has attracted lots of attention in recent years. This paper is concerned with a feasibility study of the UCG process for Alberta reservoirs using the three-dimensional simulation of this process based on a unique porous media approach.

  • The Geology of Coal - KET Education

    High-sulfur coal contains a lot of pyrite, which is a mixture of sulfur, iron, and traces of other minerals. As long as it is underground, this mixture causes no environmental problems. But when it is exposed to air through mining, the pyrite rusts and forms sulfate salts on the coal's surface that can contaminate water.

  • How Is Coal Formed – A Process Spanning Eras | Planète ...

    Close-up. How Is Coal Formed – A Process Spanning Eras . Like oil and natural gas, coal is a fossil fuel. It started forming over 350 million years ago, through the transformation of organic plant matter.

  • Glossary of Mining Terms

    Methane – A potentially explosive gas formed naturally from the decay of vegetative matter, similar to that which formed coal. Methane, which is the principal component of natural gas, is frequently encountered in underground coal mining operations and is kept within safe limits through the use of extensive mine ventilation systems.

  • Coal Exploration and Mining Geology

    Underground Mining 9.1 Underground Mining Methods ... Coal is a vital component of the world's energy resources, and one that is expected to fill a significant role in meeting our energy needs well into the foreseeable future. ... Coal Exploration and Mining Geology - Colin R. Ward

  • How do oil, gas and coal get created? – Jean-Marc Jancovici

    Just like other kerogens, coal produces oil and gas during its burrying in the underground, though in lesser quantities regarding oil. The methane issued from the process and which has remained adsorbed on the coal will be called. firedamp. Overall picture of coal formation.

  • Centralia, Pennsylvania - Wikipedia

    Coal mining continued in Centralia until the 1960s, when most of the companies shut down. Bootleg mining continued until 1982, and strip and open-pit mining are still active in the area. An underground mine about three miles to the west employs about 40 people.