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Room and pillar mining was one of the earliest methods used, [3] although with significantly more manpower. The room and pillar system is used in mining coal, gypsum, [4] iron, [5] limestone, [6] and uranium [7] ores, particularly when found as manto or blanket deposits, stone and aggregates, talc, soda ash, and potash. [8]
Room and pillar : Room and pillar mining is commonly done in flat or gently dipping bedded ore bodies. 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 stope access, allowing the roof to collapse and fill in the stope.
Retreat mining is the removal of pillars in the underground mining technique known as room and pillar mining. In the first phase of room and pillar mining, tunnels are advanced into the coal or ore body in a rectangular pattern resembling city streets. Pillars are left between tunnels to support the weight of the overburden. The first phase is ...
Download as PDF; Printable version; ... Pages in category "High-importance Mining articles" ... Room and pillar mining; S. Talk:Safety lamp; Talk:Salina Group ...
I propose that Retreat mining be merged into Room and pillar. As far as I can tell from the present article retreat mining, retreat mining is just a stage of the room and pillar system. As it is, both articles are also short enough that they could be served by a merger. If anyone knews anything that would change this impression, please say so.
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Category talk: Mining in Sri Lanka. ... Download QR code; Print/export Download as PDF; Printable version; Appearance. move to sidebar ...
Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; Appearance. move to sidebar hide. Help ... Graphite mines in Sri Lanka (3 P)