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камерно-столбовая система разработки stresses
goldmin.	room&pillar mining method (MichaelBurov); room-and-pillar mining (MichaelBurov)
mining.	room-and-pillar system (КССР Bema); North-Staffordshire method; board-and-pillar method; board-and-pillar system; bord-and-pillar method; breast-and-pillar method; pillar system; pillar working; room-and-pillar method; room-and-stoop; stall-and-brest method; stall-and-brest system; board-and-stall system; breast-and-pillar system; chamber-and-pillar system; pillar-and-room system; room-and-rance system (с нарезкой узких столбов); stoop-and-room system
O&G	pillar extraction drilling
tech.	pillar-and-breast system

камерно-столбовая система разработки: 34 phrases in 3 subjects

Geology	1
Mining	28
Technology	5