Improving Check Curtains, Line Curtains and Extensible Face Ventilation Systems

摘要

A fieldworthy 10-ft extensible brattice to maintain a 10-ft setback was found in use in two mines on continuous miner faces. This technique was evaluated in the laboratory for leakage and methane control at the face. An inby hook, inserted in the roof automatically to make possible the deployment of a longer brattice extension in the context of a remotely controlled miner, was tested in various roof types. Insertion of this design succeeded only in coal.