Vibration problems of skips in mine shafts : the effect of compressive forces in the guides

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dc.contributor.authorPretorius, T Sen_ZA
dc.date.accessioned2016-04-12T09:34:48Z
dc.date.available2016-04-12T09:34:48Z
dc.date.issued1989en_ZA
dc.description.abstractInvestigations into problems involving the vibration of conveyances in deep mining shafts have led to the identification of 'slamming' as a significant event in the initiation of large perturbations in the motion of the skip. Slamming occurs when the flexible rollers on the skip which normally act on the guides are inoperative. The primary concern is that this slamming event can give rise to large lateral loads on the shaft steelwork and is therefore a factor which limits the speed at which the skip can be drawn up the shaft. This study extends previous work to investigate the influence of compressive forces in the guides on the response of the skip and the steelwork. These forces are induced as a result of mining operations and lead to a decrease in the transverse stiffness of the guides. A mathematical model of the slamming event is formulated and a numerical solution for a specific case is performed. An alternative simplified solution is discussed and compared to the initial formulation, with the aim of facilitating the use of previous research results. A model to simulate the response of the skip when the skip rollers are functional is formulated, and numerical solutions of different examples are given. An important conclusion is that the compressive forces can significantly reduce the transverse stiffness of the guides, and should be taken into account in future designs. Bibliography: pages 86-88.en_ZA
dc.identifier.apacitationPretorius, T. S. (1989). <i>Vibration problems of skips in mine shafts : the effect of compressive forces in the guides</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering. Retrieved from http://hdl.handle.net/11427/18790en_ZA
dc.identifier.chicagocitationPretorius, T S. <i>"Vibration problems of skips in mine shafts : the effect of compressive forces in the guides."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1989. http://hdl.handle.net/11427/18790en_ZA
dc.identifier.citationPretorius, T. 1989. Vibration problems of skips in mine shafts : the effect of compressive forces in the guides. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Pretorius, T S AB - Investigations into problems involving the vibration of conveyances in deep mining shafts have led to the identification of 'slamming' as a significant event in the initiation of large perturbations in the motion of the skip. Slamming occurs when the flexible rollers on the skip which normally act on the guides are inoperative. The primary concern is that this slamming event can give rise to large lateral loads on the shaft steelwork and is therefore a factor which limits the speed at which the skip can be drawn up the shaft. This study extends previous work to investigate the influence of compressive forces in the guides on the response of the skip and the steelwork. These forces are induced as a result of mining operations and lead to a decrease in the transverse stiffness of the guides. A mathematical model of the slamming event is formulated and a numerical solution for a specific case is performed. An alternative simplified solution is discussed and compared to the initial formulation, with the aim of facilitating the use of previous research results. A model to simulate the response of the skip when the skip rollers are functional is formulated, and numerical solutions of different examples are given. An important conclusion is that the compressive forces can significantly reduce the transverse stiffness of the guides, and should be taken into account in future designs. Bibliography: pages 86-88. DA - 1989 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1989 T1 - Vibration problems of skips in mine shafts : the effect of compressive forces in the guides TI - Vibration problems of skips in mine shafts : the effect of compressive forces in the guides UR - http://hdl.handle.net/11427/18790 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18790
dc.identifier.vancouvercitationPretorius TS. Vibration problems of skips in mine shafts : the effect of compressive forces in the guides. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1989 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18790en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Civil Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCivil Engineeringen_ZA
dc.subject.otherMining haulageen_ZA
dc.subject.otherShuttle cars (Mine haulage)en_ZA
dc.titleVibration problems of skips in mine shafts : the effect of compressive forces in the guidesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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