Coal mining: Resources and labour
Rock, steel, diesel and nearly 2.7 million workers
What this tab covers The natural resources (land, water, materials, fuel or feedstock) and the labour needed to capture this energy, per unit, with the reason each is needed.Coal mining moves large volumes of rock and uses steel machinery, explosives, diesel, electricity and water. A US surface mine produces about 9 short tons per worker-hour; worldwide, coal mining employs about 2.7 million people.
Natural resources
| Resource | How much | Why it is needed |
|---|---|---|
| Land | About 50 times more land per unit of electricity than nuclear; fuel mining alone needs at least 20 times the whole mining footprint of onshore wind1211 | Thin seams of a low-energy-density fuel must be stripped or undermined over large areas |
| Overburden and refuse rock | About 18-20% of mined tonnage rejected at the washing plant1 | Seams contain shale and clay partings, and cutters take some roof and floor rock |
| Water | Not quantified for mining in our sources; a coal plant with cooling towers consumes about 687 US gallons per MWh15 | Used to wash coal, suppress dust and drain workings; the power plant downstream is the larger user |
| Steel, explosives, diesel and electricity | Not quantified per tonne; total energy inputs are small (energy return about 50 to 100)2 | Steel for roof supports and draglines, explosives for overburden, diesel for trucks, electricity for cutters, conveyors and methane ventilation |
Labour
| Phase | How much | Skills | Why it is needed |
|---|---|---|---|
| Operation (underground) | 3.24 short tons per employee hour (US, 2024): roughly 170 full-time workers per million tonnes a year (calculated, 2,000 hours per worker)4 | Machine operators, electricians, roof bolters, ventilation engineers | Underground cutting and roof support are labour-intensive |
| Operation (surface) | 8.94 short tons per employee hour (US, 2024): roughly 60 full-time workers per million tonnes a year (calculated)4 | Equipment operators, blasters, mechanics | Huge shovels and trucks need few operators |
| Global workforce | Nearly 2.7 million workers at 4,300 active and proposed mines, over 1.5 million in China: about 300 per million tonnes a year (calculated)106 | Many manual roles | Less mechanised mines need more workers per tonne |
| Productivity trend | US miners produce about three times more coal per hour than in 19783 | Automation and maintenance of large machines | Longwalls and large surface equipment replaced manual cutting |
Sources
- Coal Resource Recoverability: A Methodology (Information Circular 9368; Rohrbacher, Teeters, Sullivan and Osmonson), Table 12 US Bureau of Mines (hosted by USGS), 1993
- A Review of the Past and Current State of EROI Data (Gupta and Hall, Sustainability 3(10)) MDPI, 2011
- Coal explained: Coal mining and transportation US Energy Information Administration, 2025
- Annual Coal Report, Table 21: Coal Productivity by State and Mine Type, 2024 and 2023 US Energy Information Administration, 2025
- Coal 2025: Supply International Energy Agency, 2025
- One million coal jobs face the axe globally by 2050 (reporting Global Energy Monitor) Climate Home News, 2023
- Updated Mining Footprints and Raw Material Needs for Clean Energy The Breakthrough Institute, 2024
- How does the land use of different electricity sources compare? Our World in Data, 2022
- Operational water consumption and withdrawal factors for electricity generating technologies (Macknick et al., Environmental Research Letters 7, 045802) IOP Publishing (via OpenEI), 2012