Open-pit mining. Some 53% of South Africa's coal is produced from surface mining, via open-cast or open-pit mines. This is because the coal is less than 60 metres below the surface. Open-pit mines use draglines, as well as truck and shovel operations to extract coal. A dragline excavator uses a dragline to pull a bucket by a wire cable.
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.
Caval Ridge Coal Mine Project – Environmental Impact Statement Page 1 Glossary, Abbreviations and Units Glossary Term Definition Airlift yield volume of water per unit of time blown from the borehole during drilling (l/s) Alluvial sediments deposited by flowing water
Comes from the mining days when ham for lunch was a treat. hard coal : the Anthracite Coal that the coal region of Eastern Pennsylvania is famous for. Bituminous, or "soft coal" is mined in Western Pennsylvania. To be "from da hard coal" is to be from the Coal Region of Eastern PA.
The term coal quality is used to distinguish the range of different commercial steam coals that are produced directly by mining or are produced by coal cleaning. 3 Generally, coal quality for steam coals (i.e., coal used for electricity generation) refers to differences in heating value and sulfur content, although other characteristics such ...
Resource terminology. "Measured" – The amount of coal based on closely spaced, direct measurements such as visual confirmation on the surface, boreholes, or actual mines. Often includes information on coal rank and quality of coal as well. The specifications for this spacing and quality of measurements vary by country and between US states.
A Glossary of Scotch Mining Terms. Compiled by James Barrowman, Mining Engineer, Secretary to the Mining Institute of Scotland, 1886 ... Coal sold for delivery in horse carts is usually sold by the cart of 12 cwts., or waggon of 24 cwts. CARTRIDGE, A quantity of powder or other explosive packed in suitable form for use in blasting.
coal mining - coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of service facilities ...
A. Abutment - A coal mining term to describe the weight of the rocks above a narrow roadway transfering to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway.; Angle of dip - The angle at which strata or mineral deposits are inclined to the horizontal plane.; Anorthosite - A plutonic rock composed almost entirely of plagioclase, which is usually ...
Stanley R. Michalski, in Coal and Peat Fires: A Global Perspective, 2011 Longwall Coal Mining. The longwall-mining method is a continuous mining system that was developed for mining coal deposits uniform in thickness and slope or where the overburden pressures may crush support pillars or for improving productivity. This method relies on the complete extraction of the coal in a designated area ...
Glossary of Mining Terminology. 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 ...
T his is a partial glossary of common coal mining terms used in the United Kingdom. Some words were in use throughout the coalfields, some are historic and others are local to the different British coalfields. A. Adit: an underground level or tunnel to the surface for access or drainage.   Afterdamp Damps is the collective name given to all gases other than air found in coal mines in ...
Longwall mining systems are capable of producing significant outputs from a single longwall face – 8 million tones per annum or more. When operating correctly the coal is mined in a systematic, relatively continuous and repetitive process which is ideal for strata control and for associated mining operations. There is a high capital cost for ...
GLOSSARY OF MINING TERMS(B) Back, the plane of cleavage in coal having a smooth parting, an easy parting in the coal at a high angle to the roof and floor. To work with the cleavage is said to work the 'back of the slip' or 'on the back'. When working against the cleavage it is said to be working 'on end'; or a term describing coal projecting from the line of the face after cutting; or a ...
Illinois Coal & Coal Mining History & Genealogy; Terminology Some of the terms used in the Coal Mining Industry Adit: A horizontal passage-way, open on both ends ~ usually called a tunnel Adze: A curved tool for dressing timber Afterdamp: Gas formed from the products of an explosion of fire-damp,
A. Adit:-Entrance to a mine, usually a drift which sloped from the surface down to a coal seam.Advanced Head : -A roadway heading which is in front of the coal face line. Advance Face: -A face where the coal is extracted as the face and roadways advance inbye.Opposite to retreat mining. AFC:-An armoured flexible conveyor, used to transport coal off a face, coal cutting machines were often ...
Examples for Underground Mining Important Terms of Underground Mining . Some. Examples for Surface Mining Important Terms of Surface Mining . Mining Terms . Types of Mining ... A horizontal opening in a bedded mineral deposit (ex. coal). Face: The rock surface which excavation techniques are being preformed apon to advance a horizontal ...
A glossary of terms and meanings along with the terminolgy used in mining and exploration. Mining Talk & Terminology. Symbols & Meanings. ADIT. A nearly horizontal passage driven from the surface to the mine workings. ... BITUMINOUS COAL. A middle rank coal formed by pressure and heat on lignite. Usually has a high Btu value (british thermal ...
Basic Mining Terminology. An overview of basic mining terms and where various components of a mineral deposit end up. When metal is mined, the rock is separated into three categories. The first to be excavated is overburden, which includes plants, topsoil, and …
Glossary of terms used in the American Mining Industry. Dry Diggings – Earth excavated in the summer and held to be washed in winter when water was more plentiful.. Dry Washing – Fine soil blown away, leaving the gold.. Drywasher – A common desert mining tool similar to a highbanker but doesn't need water.It operates by the use of wind. The light junk material is blown off the top of ...
coal mining, extraction of coal deposits from the surface of Earth and from underground.. Coal is the most abundant fossil fuel on Earth. Its predominant use has always been for producing heat energy. It was the basic energy source that fueled the Industrial Revolution of the 18th and 19th centuries, and the industrial growth of that era in turn supported the large-scale exploitation of coal ...
Here's a comprehensive A-Z guide of mining terms you need to know if you are considering investing in the mining industry or are just curious about how mining works. AC drilling: Air core drilling; Air blast drilling technique with limited coring capability. Alluvial deposit: Clay or silt or gravel carried by rushing streams and deposited ...
A glossary of terms used in coal mining by Gresley, William Stukeley. Publication date 1883 Topics Coal mines and mining Publisher London, New York, E. & F.N. Spon Collection cdl; americana Digitizing sponsor MSN Contributor University of California Libraries Language English. Addeddate 18:34:47 Call number
GLOSSARY OF COAL CLASSIFICATION SYSTEM AND SUPPLEMENTARY TERMS. ... lost-in-mining.--Coal remaining in the ground after all extraction is completed. Lost-in-mining includes coal that is (1) left to support mine roofs, (2) too thin to mine, (3) unmined around oil, gas, water, and disposal wells, (4) unmined around shafts and electrical and water ...
as a mainway; a coal heading; a working place where the coal is extracted from the seam in the initial mining; same as "gate" and "roadway," both British terms. Extraction - The process of mining and removal of cal or ore from a mine. Face – The exposed area of a coal bed from which coal …
A glossary of mining terms. Mining explained. Bulk ore sorting and coarse particle recovery – leading the way in mineral processing innovation. Mining explained. Digging deeper: Mining methods explained. The four concepts underpinning a new way of mining.
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