Search U.S. government technical reports digitized or harvested by TRAIL.
An in-situ diffusion parameter for the Pittsburgh and Pocahontas No. 3 coalbeds
Methane migration characteristics of the Pocahontas No. 3 coalbed
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
Peak methane concentrations during coal mining:an analysis
Using sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines
Building stoppings in mines with large openings
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
Using inflatable stoppings during production in noncoal mines
Longwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed
Brattice window method for measuring leakage through mine stoppings
Methane absorption in oil shale and its potential mine hazard
Hydraulic stimulation of a surface borehole for gob degasification
Jet fan effectiveness as measured with SF₆ tracer gas
Methane accumulations in coal mine roof cavities
Methane emissions from gassy coals in storage silos
Bureau of Mines damage-resistant brattice
Tracer gas method for measuring leakage through mine stoppings
Correction factors for low-velocity airflow measurements in mines