The various methods of mining a coal seam can be classified under two headings surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods and the choice of which method to use in extracting a coal seam depends on many technological economic and social factorsGet Price
Feeding Size: ＜25mm
Production Capacity: 8-43TPH
Applied Materials: Coal, cement, ore, calcite, cement clinker, dolomite, clay, coal, barite,etc.
Warranty: 1 Year
Cylinder Capacity: 9-285(m³)
Processing Capacity: 1.9-76TPH
Application Area: Coal industry, construction industry, mineral industry, chemical industry.
Voltage: 380V, 50HZ
Certificate: CE, ISO9001
Design: Rotary Die, Flat Die
Feeding Size: 300-700mm
Production Capacity: 50-250TPH
Applied Materials: Iron ore, copper ore, gold ore, river gravel, limestone, granite, basalt, diabase, andesite, etc.
Warranty: 1 Year
Conventional mining is the oldest method and accounts for only about 12 of underground coal output In conventional mining the coal seam is cut drilled blasted and then loaded into cars Continuous mining is the most prevalent form of underground mining accounting for 56 of total underground production In continuous mining a machine known as a continuous miner cuts the coal from the miningMore Detail
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 19thMore Detail
When a coal seam is too deep to efficiently mine the coal from the surface underground mining techniques are used The underground method of coal mining currently utilizes two main techniques room and pillar mining and longwall mining 1 Room and pillar mining involves cutting a system of rooms within the coal seemMore Detail
The following infographic breaks down the purpose of each method and what its recovery rate SurfaceOpencast As one of the most popular methods of coal mining the surface technique consists of five main forms strip mining openpit mining mountaintop removal dredging and highwall mining RoomMore Detail
The overall coal mining process consists of several sequential stages 1 exploration of a potentially economic coal seam to assess minable reserves environmental issues marketable reserves potential markets and permitting risks 2 analysis and selection of a mining plan 3 securing the markets 4 developing the mine 5 extracting the coal 6 processing the coal if necessary and 7More Detail
There are four main mining methods underground open surface pit placer and insitu mining Underground mines are more expensive and are often used to reach deeper deposits Surface mines are typically used for more shallow and less valuable depositsMore Detail
There are four major types or “ranks” of coal Rank refers to steps in a slow natural process called “coalification” during which buried plant matter changes into an ever denser drier more carbon rich and harder material The four ranks are Anthracite The highest rank of coal It is a hard brittle and black lustrous coalMore Detail