Stability of an abandoned siderite mine: a case study in northern Spain
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Universidad Católica del Norte de ChileFecha de publicación
2021-03Editorial
De GruyterCita bibliográfica
Trigueros, Emilio, Cánovas, Manuel, Arzúa, Javier and Alcaraz, Manuel. "Stability of an abandoned siderite mine: A case study in northern Spain" Open Geosciences, vol. 13, no. 1, 2021, pp. 359-376. https://doi.org/10.1515/geo-2020-0240Revisión por pares
siPalabras clave
room-and-pillar miningstability
subsidence
numerical methods
back analysis
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Resumen
Bodovalle is an iron carbonate mine located in
Gallarta (near Bilbao, northern Spain), which is currently
in the closure stage. The deposit was first exploited as an
open-pit mine and later as an underground mine. The
underground mine currently has 40 large rooms with
rib pillars, occupying an area of 2,000m long by 600m
wide. Room depth is around 200 m. The main geotechnical
incident occurred in the NW1N zone, where an overexploited
rib pillar in poor condition was partially
removed, leaving a 70-m roof span that eventually collapsed
in 1999, resulting in a surface crater measuring
60m in diameter. The collapse was preceded by noises
and movements detected outside the mine. The subsidence
was improved by means of infilling and monitoring.
In 2014, residents living in homes built over the
abandoned mine rooms detected very loud noises similar
to those of 1999. The article describes a stability review
carried out using advanced numerical methods (finite
element method ...
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