Subject
Coalbed methane drainage
18
Coalbed methane
13
Mine ventilation
13
Coal mines and mining
8
Methane
8
Mine gases
8
Coal mines and mining Safety measures
3
Firedamp
3
Longwall mining Safety measures
3
Mine rescue work Equipment and supplies
3
Bituminous coal
2
Coal Geology
2
Coal gasification
2
Coal mines and mining Dust control
2
Grouting (Soil stabilization)
2
Longwall mining
2
Mine communication systems
2
Mine gases Analysis
2
Self-contained self-rescuer (Mine rescue equipment) Testing
2
Sulfur hexafluoride as a test gas
2
Bagging Dust control
1
Bagging Equipment and supplies
1
Blasting
1
Bolts and nuts Fatigue
1
Boring
1
Clay veins
1
Coal Analysis
1
Coal Combustion
1
Coal Storage
1
Coal mine accidents
1
Coal mines and mining Communication systems
1
Coal mines and mining Dust control Water infusion
1
Coal mines and mining Safety measures Study and teaching
1
Coalbed methane Measurement
1
Dust explosions
1
Earth resistance (Geophysics) Measurement
1
Electric detonators
1
Electric power
1
Electromagnetic waves Transmission Measurement
1
Energy consumption
1
Energy industries
1
Finance
1
Firedamp Measurement Equipment and supplies
1
Fuel
1
Ground control (Mining)
1
Magnetohydrodynamic generators
1
Metal powders
1
Methane Measurement
1
Methane Measurement Equipment and supplies
1
Mine explosions
1
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