Longwall and Room & Pillar mining are two popular underground mining methods. In Room & Pillar mining, a network of “rooms” are cut into seams. Pillars are left in place to support the roof in a regular pattern while the rooms are mined out. On the other hand, Longwall mining involves the use of mechanized shears to cut and extract ore at the face of the mine. Extracted ore is then dropped onto a chain conveyor system that will ultimately take the ore to the surface. Temporary hydraulic-powered roof supports are used instead of pillars to hold the roof up. Investing in the development of new mines can be attractive for companies when metal prices ensure profitable operations. When planning for the transportation of ore within a new mine, it is important to partner with a trusted manufacturer of underground rail cars and other conveyance equipment such as Wabi Iron & Steel Corp.
http://www.wabicorp.com/mine-rail-cars-underground-mining-information-detailed-overview/
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