Excessive support systems for mine shafts are becoming less acceptable as the costs of materials and labour increase. In addition much money is wasted when unexpected water flows have to be controlled. This article outlines the pre-construction geotechnical investigations which have proved extremely useful in predicting general rock conditions and exact locations of high water inflow. Preliminary studies should be made which include aerial photographs of the area and a literature search to establish the geological character of the area. On site, a pilot shaft of up to 6 inches diameter should be drilled and tested. Details of this operation are discussed. The tests made should be mechanical and hydrologic. Further laboratory tests should be made to establish more fully the properties or the core. During construction of the full shaft, the excavation should be followed carefully in order to ensure that the conditions encountered correspond to those expected. The costs of these investigations should be more than recouped by the lower construction price of the shaft. /TRRL/

  • Availability:
  • Corporate Authors:

    Institution of Mining Engineering

    3 Grosvenor Crescent
    London SW1X 7EG,   England 
  • Authors:
    • Swaisgood, J R
    • Versaw, R E
  • Publication Date: 1974-6

Media Info

  • Features: Photos; References;
  • Pagination: p. 37-40
  • Serial:
    • Mining Engineer
    • Volume: 26
    • Issue Number: 6
    • Publisher: Institution of Mining Engineering
    • ISSN: 0026-5179

Subject/Index Terms

Filing Info

  • Accession Number: 00097815
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 10 1975 12:00AM