The effect of blind drift length and ventilation conditions on methane concentrations in coal faces

 E.A. Kolesnichenko, V.B. Artemiev, I.E. Kolesnichenko, E.I. Lyubomishchenko

The authors discuss energy elements of the air flow circulation in a blind drift. Trends are described of the variation of fresh air volume and methane concentration in a coal face depending on the dynamic pressure of air and the length of a blind drift.