Practical experience in planning and operating underground developments are recounted. Emphasis is placed on detailed planning before the start of excavation. The road system serving the mining area should be planned with the secondary user in mind. In the planning of entrances, all alternate routes must be considered. Some of the excavated material may be left behind to divided the space into fire zones. Linear pillars will help the secondary user's need for partitions. Plenty of rock must be left in the perimeter rock between the mine and rock outcrops in the valleys - to resist freeze and thaw for many years. Plans for ventilation, utilities and sewers should be made so that the secondary developer could also benefit. Comments are made with regard to pillar spacing and dimensions. Mine tailings may be used to fill up roof cracks and subsidence; this will help the secondary developer. A good maintenance program is needed with regard to the operation of such systems as air-conditioning. The traffic and docking of large trucks has caused problems: the snow brought in by such vehicles in winter have caused a dust problem when the snow melts in the heated underground area. A robo wash could clean vehicles before entry, or the vehicles could be contained in a zoned area. Although tools are being developed to scale a raw mine, shotcreting could also be an answer. Monitoring of the structures by a series of extensometers is providing useful information related to rock movements.

Media Info

  • Features: Figures;
  • Pagination: p. 55-59

Subject/Index Terms

Filing Info

  • Accession Number: 00130632
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Apr 7 1976 12:00AM