Assertion: pit mining | /r/HasProperty | the recovery of materials
Facets:
value: from strip mining
type: OTHER
value: from quarrying
type: OTHER
value: from mountaintop removal
type: OTHER
Source sentences:
text: Techniques of surface mining include: open-pit mining, which is the recovery of materials from an open pit in the ground, quarrying, identical to open-pit mining except that it refers to sand, stone and clay; strip mining, which consists of stripping surface layers off to reveal ore/seams underneath; and mountaintop removal, commonly associated with coal mining, which involves taking the top of a mountain off to reach ore deposits at depth.