Coal mining

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

Field Hierarchy

Parent
Chemistry 28.4M papers	Engineering 23.9M papers	Organic chemistry 12.8M papers	Geography 11.1M papers
History 7M papers	Archaeology 6.3M papers	Waste management 1.5M papers	Coal 270k papers
Current
Coal mining 87.6k papers
Child
Coalbed methane 7,083 papers	Groundwater-related subsidence 4,398 papers	Underground mining (soft rock) 3,756 papers	Surface mining 3,559 papers
Longwall mining 3,495 papers	Mine safety 3,379 papers	Rock burst 2,069 papers	Coal basin 1,691 papers
Coal field 1,512 papers		Problems in coal mining 1,397 papers

Trends

Notes

History