Lignite Oxidation
nounPronunciation: /ˈlɪɡnaɪt ˌɒksɪˈdeɪʃən/
The chemical decomposition of lignite (low-rank coal) when exposed to atmospheric oxygen, producing heat, subsidence, and spontaneous combustion risks. This process accelerates in reclaimed areas with exposed coal seams and disturbed stratigraphy.
Plain English
The breakdown of low-rank coal when exposed to air, causing heat, ground collapse, and potential fires.
Etymology & History
Usage
"Lignite oxidation in the eastern Kentucky mine resulted in ground subsidence and required capping with clay layers during reclamation."
Style guide notes: Always capitalize 'Lignite' when referring to the specific coal rank; distinguish from general coal oxidation.
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Related Terms
Frequently Asked Questions
Why is lignite oxidation a concern in mine reclamation?
Lignite oxidation releases heat, causing ground subsidence, and can trigger spontaneous combustion if oxygen access isn't controlled.
How do reclamation engineers prevent lignite oxidation?
Engineers cap exposed coal seams with compacted clay or synthetic barriers to limit atmospheric oxygen exposure and heat generation.
Why Test Candidates on This?
Critical for understanding hazards specific to lignite mine reclamation and designing appropriate capping strategies.
Required skill level: Mid