Search U.S. government technical reports digitized or harvested by TRAIL.
The direct method of determining methane content of coalbeds for ventilation design
Ventilation eddy zones at a model coal mine working face
Tracer gas as an aid in mine ventilation analysis
Using sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines
Replacing brattice cloth at coal faces with air curtains and diffuser fans,a preliminary study
A spiral sequential sampler for air and liquids :preliminary results
Three coal mine ventilation studies using sulfur hexafluoride tracer gas
Longwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed
Brattice window method for measuring leakage through mine stoppings
Hydraulic stimulation of a surface borehole for gob degasification
Jet fan effectiveness as measured with SF₆ tracer gas
Bureau of Mines damage-resistant brattice
Tracer gas method for measuring leakage through mine stoppings