Page history

DavidB4-bot

→‎top: re-categorisation

Sunda62

Category:Mining -> Category:Coal mining

Joaquín Martínez

Reverted edits by TylerFx (Talk) to last version by RJJensen

TylerFx

Replaced content with 'Page corrected by Anon.'

RJJensen

Reverted edits by Hazudra (Talk) to last version by Masterbratac

Hazudra

no edit summary

Masterbratac

bolding title

Ed Poor

Mining is a better category than "energy"

Aschlafly

undeadend

Aschlafly

New page: A drift mine is a type of coal mine that is driven horizontally into coal that is exposed or accessible in a hillside. In a hydraulic mine, high-pressure water jets break the coal from a...