Precision Seals
Precision Seals are designed to seal abandoned areas of a coal mine while maintaining productivity in active areas. Sealing inactive areas reduces mine air ventilation requirements and blocks the flow of dangerous gases.
Precision Seals are designed to seal abandoned areas of a coal mine.
Strata Mine Services is the primary installer of the Precision Mine Repair Seal Systems. These seals are MSHA approved to withstand dynamic loads of 50 psi and 120 psi.
Rugged & Airtight
Precision Seals are installed by drilling and anchoring #9, #8 and #5 rebar into the roof and floor of the mine. The rebar is wired into a 3-D welded wire mesh to form a strong rib system. The entire unit is coated with a high-pressure, high-strength shotcrete/Gunite application. The shotcrete is required to have a compressive strength of no less than 4,500 psi after 3 days of curing. Shotcrete is applied to overlap the roof, ribs and floor, producing a rugged, airtight area.
50 psi Seal
The 50 psi Seal is designed for openings up to 12 feet high and 25 feet wide with a seal thickness up to 26 inches. The seal can withstand dynamic loads of 50 psi. (MSHA Approval number: 50-75.336.1.07.03.0)
120 psi Seal
The 120 psi Seal is designed for openings up to 12 feet high and 25 feet
wide with a seal thickness up to 26” thick. The seal can withstand dynamic
loads of 120 psi.
(MSHA Approval number: 120-75.336.1.07.04.0)
Turnkey Installation Services & Logistical Support
Strata Mine Services saves customers time and money with turnkey installation of Precision Seals and logistical support for our entire product line.
Contact us for more information on Precision Seals.