A method of underground mining in which approximately half of the coal is left in place to support the roof of the active mining area. Large 'pillars' are left while 'rooms' of coal are extracted.
Found on
http://www.coaleducation.org/glossary.htm
A method of mining flat-lying ore deposits in which the mined-out area, or rooms, are separated by pillars of approximately the same size.
Found on
http://www.southernperu.com/ENG/intope/Pages/PGGlossary.aspx
A type of open stoping wherein pillars are left in place in a regular pattern while the rooms are mined out. In many room and pillar mines, the pillars are taken out, starting at the farthest point from the mine haulage exit, retreating, and letting the roof come down upon the floor. Room and pillar mining is well adapted to mechanization, and is c...
Found on
https://www.encyclo.co.uk/local/22734
No exact match found.
