room-and-pillar
Look at other dictionaries:
Room and pillar — (also called bord and pillar) is a mining system in which the mined material is extracted across a horizontal plane while leaving pillars of untouched material to support the roof overburden leaving open areas or rooms underground. It is usually… … Wikipedia
Room-and-pillar mining — The most common method of underground mining in which the mine roof is supported mainly by coal pillars left at regular intervals. Rooms are places where the coal is mined; pillars are areas of coal left between the rooms. Room and pillar… … Energy terms
room-and-pillar — | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective : bord and pillar * * * /roohm euhn pil euhr, room /, adj. Mining. noting a means of extracting coal or other minerals from underground deposits by first cutting out rooms, then robbing the pillars between them;… … Useful english dictionary
room-and-pil|lar — «ROOM uhn PIHL uhr, RUM », adjective. of or designating a system of mining coal in which a series of rooms is cut into the coal bed, in each of which the miners leave columns of coal standing to help support the roof until they mine out a… … Useful english dictionary
pillar-and-breast — | ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ adjective : bord and pillar * * * /pil euhr euhn brest /, adj. Mining. room and pillar … Useful english dictionary
pillar-and-breast — /pil euhr euhn brest /, adj. Mining. room and pillar. * * * … Universalium
Pillar Institute — The Pillar Institute is a Christian school affiliated with the KLD Youth Foundation. It opened on September 18, 2006.HistoryKevin L. Deaton, pitcher for the Oakland Aces, founded the KLD Youth Foundation and the Pillar Institute in 2003. His… … Wikipedia
Combe Down and Bathampton Down Mines — Site of Special Scientific Interest … Wikipedia
Cumberland Railway and Coal Company — The Cumberland Railway and Coal Company is a defunct Canadian industrial company with interests in coal mines in Springhill, Nova Scotia, and a railway that operated from Springhill Junction to Parrsboro. Contents 1 Spring Hill and Parrsborough… … Wikipedia
Hudson Bay Mining and Smelting Co. — Hudson Bay Mining Smelting Co., Limited (HBMS) has been exploring and mining inManitoba for over 70 years. Much of their history has centered around Flin Flon, Manitoba. The Flin Flon orebody was discovered by David Collins, a local trapper, and… … Wikipedia
