Quick-fix Blowout Stopping Field Evaluation.
NTIS: PB/299-541 :72 pages
Quick-fix blowout stoppings were evaluated in several underground mines as an alternative to conventional ventilation control bulkheads. Blowout stoppings offer considerable savings in bulkhead construction and repair costs in the 0.1-Inch h2o of differential pressure required to inflate them is available. The quick-fix blow- out stoppings were used successfully in uranium mines in the southwestern United States where savings in bulkhead construction and repairs to blast damaged bulkheads are estimated to equal $9,500 over the projected 2-year average life of a blowout stopping. Two types of material were evaluated. Five methods of anchoring the stoppings to drift walls were evaluated. Three methods of anchor attachment to the stopping material were evaluated. Blast pressure measurements were made in conjunction with the evaluation of the blowout stoppings.
CP; Final Contract Report;
NTIS Accession No.
Foster-Miller Assoc., Inc.