link below with the depths.
The average depth of China coal mines is 456m
China's Coal: Demand, Constraints, and Externalities
http://escholarship.org/uc/item/8kk9n3rr#page-8
Page 8/41
Another problem for china lifting coal production is a limited supply of water.
All this plays in the hands of EER and the Australia coal industry in general.
indian cos to focus on acquiring coal assets, page-7
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