The effect of the intermediate principal stress on pillar strength
Duncan Maina1
Heinz Konietzky2
1.Geotechnical Institute,TU Bergakademie Freiberg,Gustav-Zeuner-Straße 1,09599 Freiberg,Germany;Department of Mining and Mineral Processing Engineering,School of Mines and Engineering,Taita Taveta University,P.O.Box 635-80300,Voi,Kenya2.Geotechnical Institute,TU Bergakademie Freiberg,Gustav-Zeuner-Straße 1,09599 Freiberg,Germany
摘要：Room and pillar mining is an underground mining method that utilizes natural pillar support to control rock mass behavior,ensuring mine stability and a safe mine environment.This study specifically documents the influence of the intermediate principal stress component on the pillar behavior.So far only classical failure criteria ignoring the influence of the intermedi-ate principal stress component were used for underground pillar design.By using an extended Hoek-Brown failure criterion in comparison with the classical Hoek-Brown failure criterion,the influence of the intermediate principal stress component is documented by indicating those areas where the failure criterion is violated.This study demonstrates,that depending on the rock type,the intermediate principal stress component can have a significant effect.Ignoring this influence can lead to uneconomic pillar design and incorrect determination of the factor of safety.
机标关键词：principalstresseffectintermediatepillarstrength
论文发表日期：2025-02-28
在线出版日期：2025-10-15（本平台首次上网日期，不代表文献的发表时间）
页数：7( 305-311 )
英文信息