Adit Portal
nounPronunciation: /ˈædɪt ˈpɔrəl/
The entrance or exit point of a nearly horizontal mine tunnel (adit) driven into a hillside to access ore or provide drainage. Abandoned adit portals require structural assessment and sealing to prevent hazards and environmental impacts.
Plain English
The opening of a horizontal mine tunnel that requires inspection and closure for safety and environmental protection.
Etymology & History
Usage
"The unstable adit portal presented a safety hazard requiring reinforcement and controlled closure during site reclamation."
Style guide notes: Use 'adit portal' for formal technical writing; 'adit entrance' is acceptable in less formal contexts.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
Why are abandoned adit portals hazardous?
Portals pose ground collapse risks, toxic gas accumulation, and uncontrolled water discharge impacting ecosystems and public safety.
How are adit portals reclaimed?
Reclamation involves structural assessment, water management, gas venting, strategic sealing, and post-closure environmental monitoring.
Why Test Candidates on This?
Adit portal assessment is important for evaluating mine site hazards, water management, and closure method selection.
Required skill level: Mid