Analysis of Raise Boring with Grouting as an Optimal Method for Ore Pass Construction in Incompetent Rock Mass-A Case Study

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dc.contributor.authorRojas, Cluber
dc.contributor.authorAnani, Angelina
dc.contributor.authorCordova, Eduardo
dc.contributor.authorNyaaba, Wedam
dc.contributor.authorWellman, Edward
dc.contributor.authorAdewuyi, Sefiu O.
dc.date.accessioned2025-01-20T16:15:05Z
dc.date.available2025-01-20T16:15:05Z
dc.date.issued2024
dc.description.abstractThe construction of ore pass systems in underground mines is a high-risk activity, especially in an environment with incompetent rock mass. This study aims to investigate the optimal method for ore pass construction in incompetent rock masses. We evaluated the conventional and raise boring (RB) methods based on safety, efficiency, excavation control, and ground support for ore pass construction. We also performed a stability analysis using analytical Q-raise (Q(R) method) and kinematic analysis methods for ore pass construction with a Raise Borer before and after grout injection of the rock mass. As a case study, an ore pass (diameter, 3 m; depth, 100 m) within an incompetent rock mass was considered to gain further insight. The rock mass was characterized according to the classification methods Q Barton, rock quality designation (RQD), rock mass rating (RMR), and geological strength index (GSI). The grout intensity number (GIN) method of grout injection is used. The safety factor (<1.075) obtained before injection was lower than the acceptance criteria in all sections of the rock mass. However, grout injection before Raise Borer excavation resulted in a rock mass safety factor greater than 1.5. Using RB without pre-grouting in the case study indicated that the maximum unsupported diameter (MUSD) of the ore pass was less than the required 3 m. On the contrary, an MUSD of the rock mass post-grouting was equal to or larger than 3 m at all depths.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s42461-024-01023-0
dc.identifier.eissn2524-3470
dc.identifier.issn2524-3462
dc.identifier.urihttps://doi.org/10.1007/s42461-024-01023-0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90476
dc.identifier.wosidWOS:001252329700001
dc.language.isoen
dc.revistaMining metallurgy & exploration
dc.rightsacceso restringido
dc.subjectRock Mass Stability
dc.subjectGrout Injection
dc.subjectOre Pass
dc.subjectRaise Borer
dc.subjectGIN Method
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleAnalysis of Raise Boring with Grouting as an Optimal Method for Ore Pass Construction in Incompetent Rock Mass-A Case Study
dc.typeartículo
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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