room-and-pillar

room-and-pillar

[′rüm ən ′pil·ər]
(mining engineering)
A system of mining in which the coal or ore is mined in rooms separated by narrow ribs or pillars; pillars are subsequently worked.
References in periodicals archive ?
The MC350 continuous miner for midsize room-and-pillar applications is the latest addition to Sandvik's offering of continuous miners.
Sandvik continuous miners, including MC250, MC430, MC470 and now MC350, satisfy all seam conditions for room-and-pillar mines.
Announced yesterday, the permit authorizes Amfire Mining of Latrobe, Westmoreland County, to conduct room-and-pillar mining in 2,929.
Room-and-pillar mining is a traditional mining method in which miners leave pillars of coal to support the roof and prevent subsidence as mining progresses.
It is estimated that about 80-90% of the oil shale total underground production is obtained by room-and-pillar (RAP) method with blasting.
Monitoring and analysis of room-and-pillar mining with continuous miner in Estonian oil shale mines // 3rd Intern.
In the room-and-pillar approach, miners create a grid work of pillars as they advance their entry tunnels.
UMCO), the company which owns High Quality Mine, to restrict its mining to the room-and-pillar method and refrain from using longwall techniques in the area below the stream.
A transition toward using the probabilistic approach for engineering design of geologic structures is taking place for rock wedge failure (Park and West, 2000), slope stability, and room-and-pillar failure in oil shale mining and underground uranium mines, among others.
Stable land is located in the room-and-pillar mining area of Kava, No.
The mine is a room-and-pillar operation, which uses continuous miner machinery and operates a preparation plant.
Warrior Coal is an underground mining complex that utilizes two continuous mining units employing room-and-pillar mining techniques and is located adjacent to the Partnership's Western Kentucky operations.