A review on pore-fractures in tectonically deformed coals

Exploitation of coalbed methane (CBM) has dual advantages of not only providing alternative clean-energy but also effectively reducing the proneness for gas outbursts. CBM reservoir properties for tectonically deformed coals (TDCs) differ significantly in comparison to neighboring primary coals, largely attributing to their pore-fracture transitions. Considerable efforts have been invested to capture the structural properties of wide scales in...