Abstract:

Planned by Mao Khe Coal Company development will move below the horizon-150m with the extraction of 2.0 million tons of coal per year. At deep horizon, the gas contained in coal seams increases, especially for Mao Khe- higher category gas-coal mine. Degassing solutions to reduce methane emissions in exploitation of V9D-coal seam down to 8.8m3/T.24day-night and mining production in longwall increased by 33%. Gas concentration in the exhaust air flow decreased by 0.2- 0.6%, while the frequency of the automatic power outage decreases markedly. It also provides safety and increase the production of coal mining at deeper levels in Mao Khe mine in particular, as well as in other coal mines of our country as a whole