Sentence examples for mining air from inspiring English sources
Industry officials believe they face a hostile administration that could seriously harm their business with a range of new federal regulations on greenhouse gas emissions, mountaintop removal mining, air pollution, coal ash disposal and mine safety.
The pumping equalized mine air pressure with the ground environment and eliminated the need to use a slow, risky procedure of extracting the miners through an air lock to guard against an explosive decompression that could have injured them.
The mine air was monitored by calculating the variable wind resistance from the branch wind quantity.
The shock wave is well capable of suspending the settled coal and rock dusts into mine air.
Open image in new window Fig. 3 Rock dust's heat sink effect for lowering the mine air temperature.
Drainage boreholes located below this channel may draw excessive mine air that dilutes drainage gas concentration and efficiency.
Without suspending the deposited coal dust into the mine air, it is very unlikely for the lower explosive limit of coal dust to be reached.
To improve mine air quality and dust collection performance, an enclosed cyclone passageway (ECP) dust-collecting fan has been designed and developed.
The bases for the variations could be related to the coal dust size, methane concentration in mine air, rank of coal, etc.
The shorter distance for the mine air to remain above the minimum ignition temperature of coal dust, the less is the possibility for the coal dust to participate in mine explosion.
The mine ventilation systems emit to the atmosphere large quantities of air including mine air constituents from which methane, CO or CO2 have an effect on air pollution around the surface ventilation stations.
