Subsurface Ventilation Systems

Chapter 4.Subsurface Ventilation Systems:
Fans,Stoppings and Seals,Doors and airlocks,Regulators
Air crossings,Gas control,Fan maintenance, Mine resistance, Leakage control, Direction of airflow,Escapeways,Airflow travel distance and use of old workings,
Basics of district system design,Stratified deposits, Longwall systems,Room (bord) and pillar systems,Orebody deposits,Line brattices and duct systems,Forcing, exhausting, and overlap systems,Air movers,Background and principles of controlled partial recirculation,Controlled recirculation in headings,District systems,Types of repository,Ventilation circuits in repositories for nuclear waste,Additional safety features