of sulphur nitrogen in underground coal mining area
Data fusion for investigating land subsidence .
Coal mining areas all over the world are often threatened by serious environmental hazards such as the occurrence of coal fires, land subsidence, etc. Coal fires burn away the natural nonrenewable coal resources, locally raise the temperature of the area, emit polluting gases such as oxides of carbon, sulphur and nitrogen, and when present ....
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Sulfur and nitrogen in the highsulfur coals of .
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Underground mining takes place when the coal seams are too deep to ... a large surface area, and sulphur compounds in the coal are ... tons of nitrogen ......
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However, the ground above mine tunnels can collapse, and acidic water can drain from abandoned underground mines. Methane gas that occurs in coal beds (seams) can explode if it concentrates in underground mines. This coal bed methane must be vented out of mines to make mines safer places to work....
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Coal mining is the process of extracting coal from the ground. ... of the mining area. ... a mixture of carbon dioxide and nitrogen in a mine can cause suffocation, ......
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Opencast mines damage a large land surface area, ... sulphur dioxide, oxides of nitrogen and carbon monooxide ... In underground coal mining men suffer from coal ....
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In continuous mining, a machine known as a continuous miner cuts the coal from the mining face, obviating the need for drilling and blasting. Types of underground minesshaft mines, slope mines and drift mines. The decision of what type of mine to construct depends on the depth of the coal seam and the surrounding terrain....
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of sulphur nitrogen in underground coal mining area. Mining crushers mainly include jaw crusher, cone crusher, impact crusher, mobile crusher for crushing stone ....