Show simple item record

dc.contributor.authorHosca, Erhanen_US
dc.date.accessioned2014-03-14T21:30:55Z
dc.date.available2014-03-14T21:30:55Z
dc.date.issued1995-01-15en_US
dc.identifier.otheretd-03042009-040821en_US
dc.identifier.urihttp://hdl.handle.net/10919/41414
dc.description.abstract

A numerical model was developed to analyze the effectiveness of active and passive secondary support systems on the stability of a retreating longwall tailgate opening. The range of loading conditions that any tailgate can be subjected to was identified to form the basis of numerical modeling. The tailgate entry was considered as a part of roof-pillar-floor system, whose behavior is controlled largely by the structural integrity of each member. Numerical modeling was then conducted on tailgate openings to determine roof, floor, and rib responses, including failure modes to a variety of loading conditions for wood cribs and roof trusses employed as active and passive means of secondary support. Trends were developed from numerical modeling to determine optimum load capacity and paints of application for reducing the potential for entry failure.

en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1995.H673.pdfen_US
dc.subjectMaterialsen_US
dc.subject.lccLD5655.V855 1995.H673en_US
dc.titleNumerical analyses of the effectiveness of secondary tailgate support systems :a stability approachen_US
dc.typeThesisen_US
dc.contributor.departmentMining Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMining Engineeringen_US
dc.contributor.committeechairHaycocks, Christopheren_US
dc.contributor.committeememberKarmis, Michael E.en_US
dc.contributor.committeememberSmith, Charles W.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03042009-040821/en_US
dc.date.sdate2009-03-04en_US
dc.date.rdate2009-03-04
dc.date.adate2009-03-04en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record