Capping Layer
nounPronunciation: /ˈkæpɪŋ ˈleɪər/
A protective barrier material placed over contaminated or exposed mine waste to prevent water infiltration, oxidation, and contaminant leaching. Common capping materials include compacted clay, synthetic liners, and composite soil covers.
Plain English
A protective covering placed over mine waste to prevent water from carrying pollutants into the ground.
Etymology & History
Usage
"Engineers installed a two-meter capping layer of compacted clay over the tailings to minimize acid generation."
Style guide notes: Avoid hyphenating; write as two words unless used as adjective 'capping-layer design'.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What materials are used for mine capping layers?
Clay, geotextiles, synthetic liners, soil amendments, and compost form effective multi-layered cap systems.
Why is capping necessary in mine reclamation?
Caps isolate waste from oxygen and water, preventing chemical reactions that generate acidity and dissolve contaminants.
Why Test Candidates on This?
Essential for evaluating containment strategies and understanding multi-barrier approaches in environmental remediation.
Required skill level: Mid