Problems in coal mining
There are several types of problems in coal mining. These include faults, the water table, washout, thin seams, and split seams.
Faults
If the coal seam reaches a fault, the seam may be significantly displaced, depending on the type of fault and its offset. Machinery trying to mine the coal may not be able to reach the displaced seam, if the displacement is too large. Coal mines use a combination of boreholes and high-resolution seismic reflection data to identify the larger faults and avoid the most faulted areas at the mine planning stage.[1]
Water table
If the water table is too high, the mine will flood with water. While mining, water needs to be constantly pumped out and this is expensive.
Washout
If a distributary or river changes course and cuts into the swamp material that will form coal, the coal seam is not fully formed and there may be a problem with mining it[clarification needed].
Thickness of seams
If the seams are too thin it may be uneconomic to mine the coal. The cost of production could exceed the selling price.
Splitting of seams
If the seam splits, due to a delta collapsing, sand and silt sediments pile up on top until that area is covered. This may make all or part of the coal seam uneconomic to mine as it is too thin.
References
- ^ Cocker, J.; Urosevic, M.; Evans, B. (1997). "A High Resolution Seismic Survey to Assist in Mine Planning". In Gubins A.G. (ed.). Proceedings of Exploration 97: Fourth Decennial International Conference on Mineral Exploration (PDF). Decennial Mineral Exploration Conferences, Toronto, Ontario, Canada. pp. 473–476. Archived from the original (PDF) on 2011-07-10. Retrieved 2009-11-17.
- v
- t
- e
(lowest to highest)
- Xylit
- Peat1
- Lignite
- Sub-bituminous coal
- Bituminous coal
- Anthracite
- Graphite1
- Ash pond
- Asian brown cloud
- Asthma
- Black coal equivalent
- Char
- Charcoal
- Coal
- Coke
- Coking
- Energy value
- Flue gas
- Fly ash
- Fossil fuel
- Fossil fuel phase-out
- Great Smog of London
- Greenhouse gas emissions
- Metallurgical coal
- NOx
- Smog
- Sulfur dioxide
- Toxic heavy metals
- Blackdamp
- Black lung disease
- Coal dust
- Coalfields
- Coal
- gas
- homogenization
- liquefaction
- mining disasters in the United States
- mining region
- refuse
- slurry
- town
- Environmental issues in Appalachia
- Environmental justice and coal mining in Appalachia
- Firedamp
- Health and environmental impact of the coal industry
- Health effects of coal ash
- History of coal mining
- Hydrogen sulfide
- Mining regions
- Outbursts
- Peak coal
- Problems in coal mining
- Refined coal
- Whitedamp
This article about mining is a stub. You can help Wikipedia by expanding it. |
- v
- t
- e