Samples of air collected in the intake and return gate roads of an advancing long wall face show 0.25% and 0.75% CH4, respectively. The panel has a production of 400t in an 8 hour shift when an air quantity of 18 m3/s passes through it. Then the methane emission in m3/te of coal mined is
A. 0.02
B. 0.81
C. 2.25
D. 6.48
Answer: Option D
This Question Belongs to Mining Engineering >> Mine Ventilation
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