Room and Pillar definition

Room and Pillar means a method of underground mining in which approximately half of the coal is left in place as “pillars” to support the roof of the active mining area while "rooms" of coal are extracted.
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Examples of Room and Pillar in a sentence

  • Room and Pillar - mining is divided into six categories:• room-and-pillar basic (RPB, fig.

  • Frith 73Calculation of Subsidence for Room and Pillar and Longwall PanelsA.

  • This is similar to the Room and Pillar method with the only exception that in this method, pillars of coal mineral are removed at the end of drivage in the opposite distance from which the mine is advanced.

  • Parker and Scott, Instrumentation of Room and Pillar Workings, Proc.

  • SME Mining Engineering Handbook, Third Edition, Chapter 13.2, Room and Pillar Mining of Coal.

  • Hawkins, “Operational Techniques for Room and Pillar Retreat Mining - Final Report,” USBM Contract No. HO282021, March 1980, 76 pp.

  • P.W., Hawkins, S.A. and Thompson, R.R. Room and Pillar Retreat Mining, A Manual for the Coal Industry.

  • Ex. P-15; Comsul Ltd., Final Report for Bureau of Mines, “The Implementation of UHF Radio Communications and CCTV Monitoring Systems in a Room and Pillar Metal/Non-Metal Mine,” March 1981.

  • Though more detailed work is required to finalize expected mining recoveries, the following parameters have been used for each mining method: • Stepped Room and Pillar – Mining Recovery 70%, Mining Dilution 10% (at a grade of 1 g/t) • Blasthole – Mining Recovery 80%, Mining Dilution 30% (at a grade of 1 g/t) The recoveries shown for stepped room and pillar mining consider that pillars will be located in low grade sections etc.

  • Morris stated that if enough farmers say “no” to longwall mining, then the company would have to long wallelsewhere or use the Room and Pillar method.

Related to Room and Pillar

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