information about Longwall mining field
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 |
Coal mining 95.6k papers | |||
Current | |||
Longwall mining 3,811 papers | |||
Child | |||
Retreat mining 0 papers | Coal mine bump 0 papers |
Trends
Notes
History