Coal mining

https://www.wikidata.org/wiki/Q12880211

Field Hierarchy

Parent
Chemistry 29.5M papers	Engineering 25.7M papers	Geography 13.4M papers	Organic chemistry 13.2M papers
History 8.1M papers	Archaeology 7M papers	Waste management 1.6M papers	Coal 293k papers
Current
Coal mining 95.6k papers
Child
Coalbed methane 7,567 papers	Groundwater-related subsidence 4,629 papers	Underground mining (soft rock) 4,421 papers	Surface mining 3,972 papers
Longwall mining 3,811 papers	Mine safety 3,750 papers	Rock burst 2,211 papers	Coal basin 1,797 papers
Coal field 1,708 papers		Underground coal gasification 1,628 papers

Trends

Notes

History