portals
nounPronunciation: /ˈpɔːrtəlz/
The visible openings or entrances to underground mine workings that provide access to the subsurface mining operations.
Full Definition
Portals are the engineered openings that serve as the primary access points to underground mining operations, typically consisting of horizontal or inclined entries cut into hillsides or rock faces. These structures are critical components in mine reclamation projects as they often require specialized closure techniques to prevent unauthorized access while maintaining proper drainage and ventilation. In editorial contexts, portals represent key visual and safety elements that must be documented and described in reclamation planning and compliance reporting. The term encompasses both active operational entrances and abandoned openings that pose ongoing environmental and safety challenges.
Plain English
The tunnel-like openings that miners use to enter and exit underground mines, which need to be properly sealed when the mine is cleaned up.
In Editorial Context
Key structural elements in mine reclamation documentation that require detailed description of closure methods, safety measures, and ongoing monitoring requirements in compliance reports and environmental assessments.
Etymology & History
Term evolved from architectural terminology for grand entrances to describe mine openings as mining industrialized in the 18th-19th centuries.
Originally referred to decorative architectural entrances before being adopted for utilitarian mine openings.
Usage
"The reclamation plan identified twelve abandoned portals requiring immediate closure to prevent unauthorized access and wildlife entrapment."
Usage note: Always specify portal type (horizontal, inclined, vertical) and condition when used in technical documentation.
Context: Mine reclamation planning, safety assessments, environmental compliance documentation
Region: international
Also known as
Contrasted with
Don't confuse with
Often confused with shafts, but portals are horizontal/inclined access points while shafts are vertical.