GMS Mine Repair
Overcasts / Undercasts
Direct the Flow
Overcasts and Undercasts for Seamless Ventilation Control in Underground Mines
GMS constructs overcasts and undercasts to manage intersecting airways and maintain uninterrupted airflow in underground mining environments. These structures are essential for separating intake and exhaust air, allowing haulage or personnel routes to cross ventilation paths without disrupting air circulation. Built to MSHA standards and tailored to your mine’s layout, our overcasts and undercasts are fabricated using concrete, block, or steel forms to provide long-term durability and minimal airflow resistance.
Overcasts/Undercasts
- Custom-built to match air volume, roadway size, and structural needs
- Fabricated using concrete block, gunite, steel forms, or hybrid construction
- Ensure proper separation of intake and return air in complex mine networks
- Installed in active or new development zones with minimal production impact
- Designed to meet or exceed regulatory and airflow performance standards
- Supported by in-house engineering and experienced underground crews
