Estimation of lining thickness around circular shafts

Ozturk H., Unal E.

17th International Mining Congress and Exhibition of Turkey (IMCET 2001), Ankara, Turkey, 19 - 22 June 2001, pp.437-444 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Ankara
  • Country: Turkey
  • Page Numbers: pp.437-444
  • Middle East Technical University Affiliated: No


In this paper, the broken zone developing, around a circular mine shafts and lining pressure is estimated by integrating the results of numerical analysis and the "rock-load height" equation derived from empirical analysis. During numerical modelling studies, the computer program FLAC(2D) was utilized. In order to estimate equivalent Mohr failure Envelope from the generalised Hoek Brown failure criterion, a new FISH function was written within FLAC(2D). Parametric studies were carried out by considering mRMR (modified Rock Mass Rating) values, depth from surface, shaft diameter, ratio of horizontal principal-stresses and uniaxial compressive strength of intact rock. Finally, the computer program, "SHAFT" was also introduced. This program simplifies the lengthy and complex process of shaft-lining design.