Abandoned Mine Reclamation Glossary
743 terms total — 10 showing — Last updated 26 Oct 2026
Closure Financial Assurance
A regulatory mechanism requiring mining operators to establish monetary reserves or financial instruments sufficient to fund complete reclamation and long-term site management. The assurance amount is calculated based on detailed closure cost estimates and is held in escrow or bonded accounts.
Abandoned Mine Portal
The entrance or opening of a mine that is no longer actively worked or maintained, often presenting physical and chemica...
Abandoned Mine Portal Sealing
The structural closure and safety isolation of mine entrances using engineered barriers such as bulkheads, fill, or rein...
Mine Portal
The entrance or exit structure of an underground mine, including the surface opening, surrounding framework, and initial...
Mine Portal Backfill
The controlled placement of compacted fill material, such as rock fragments or processed tailings, into abandoned mine e...
Mine Portal Closure
The sealing or blocking of mine entrance openings to prevent unauthorized access, control ventilation, and contain under...
Mine Portal Closure Infrastructure
Physical structures and engineering controls installed at abandoned mine entrances to prevent unauthorized access, wildl...
Mine Portal Reclamation
The process of sealing, securing, or removing entrance structures to abandoned mines including adits, shafts, and portal...
Mine Portal Remediation
Structural and environmental restoration of mine entrances and adits, including stabilization of portal walls, removal o...
Mine portal sealing
The installation of permanent or semi-permanent barriers at underground mine entrances to prevent unauthorized access, e...
Mine Portal Stabilization
Engineering work to secure, seal, or reinforce the entrance openings of underground mines to prevent unauthorized access...