Design and stability of barrier pillars in longwall mining

dc.contributor.authorTaiwo, Arisekola Omolajaen
dc.contributor.departmentMining Engineeringen
dc.date.accessioned2019-02-15T20:59:40Zen
dc.date.available2019-02-15T20:59:40Zen
dc.date.issued1982en
dc.description.abstractThe finite element method of stress analysis was utilized throughout this study to model single- and double-entry longwall systems. The influence of the geology, mining depth and mine-layout on barrier pillar stability was examined and design guidelines for determining sizes for such pillars were established using the "pillar core concept". The yield zone was better estimated by the use of the Coulomb failure/strength approach than the Drucker-Prager failure criterion. The width of the yield zone surrounding a barrier pillar is not constant as originally assumed, but depends on the size of the panel width (width of extraction). However, its influence can be ignored for face lines in excess of 800 feet. Although this analysis was based on information pertaining to a particular mine plan and specific geologic conditions, the recommended values of pillar sizes are in agreement with those suggested in other case studies. The results presented in this thesis, therefore, could serve as a general approximation of barrier pillar sizes if a more precise analysis is not available.en
dc.description.degreeM.S.en
dc.format.extentix, 154, [2] leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/87626en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 8664764en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1982.T348en
dc.subject.lcshPillaring (Mining)en
dc.titleDesign and stability of barrier pillars in longwall miningen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameM.S.en
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