Closure Material Balance
nounPronunciation: /ˈkloʊʒər məˈtɪriəl ˈbælənts/
A quantitative accounting of all incoming and outgoing materials during mine reclamation, including waste rock, ore stockpiles, backfill, water, and environmental amendments. This balance ensures mass conservation and verifies that sufficient materials exist to achieve reclamation objectives within budget constraints.
Plain English
Tracking all materials moving in and out during mine reclamation to ensure enough is available to complete the project.
Etymology & History
Usage
"The closure material balance confirmed that on-site waste rock contained sufficient non-acid generating material for engineered fills."
Style guide notes: Use full term in closure plans; abbreviate CMB only in detailed technical tables or budget spreadsheets.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What materials are included in a closure material balance?
Waste rock, ore, topsoil, water, amendments, backfill, and all materials moved or used during reclamation.
Why is closure material balance important?
It confirms sufficient materials exist for reclamation, identifies deficits requiring external sources, and prevents budget overruns.
Why Test Candidates on This?
Closure material balance understanding is essential for assessing reclamation feasibility, cost estimation, and closure plan completeness.
Required skill level: Mid