Abandoned mine remediation measures by chamber filling with granular materials

Castellanza, R; Gerolymatou, E; Nova, R

dc.contributor.author	Castellanza, R	en
dc.contributor.author	Gerolymatou, E	en
dc.contributor.author	Nova, R	en
dc.date.accessioned	2014-03-01T02:51:02Z
dc.date.available	2014-03-01T02:51:02Z
dc.date.issued	2007	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35308
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-56249149289&partnerID=40&md5=b2d31f4e833072bc088fe53a986e6246	en
dc.subject.other	Axisymmetric analyses	en
dc.subject.other	Chamber fillings	en
dc.subject.other	Consolidation theories	en
dc.subject.other	Experimental datums	en
dc.subject.other	Filler materials	en
dc.subject.other	Loss of strengths	en
dc.subject.other	Mechanical characteristics	en
dc.subject.other	Mechanical strengths	en
dc.subject.other	Northern Italy	en
dc.subject.other	Parametric analysis	en
dc.subject.other	Pore water pressure generations	en
dc.subject.other	Remedial measures	en
dc.subject.other	Three parameters	en
dc.subject.other	Time to failures	en
dc.subject.other	Water pressures	en
dc.subject.other	Compressive strength	en
dc.subject.other	Erosion	en
dc.subject.other	Fillers	en
dc.subject.other	Filling	en
dc.subject.other	Granular materials	en
dc.subject.other	Gypsum	en
dc.subject.other	Lead mines	en
dc.subject.other	Mines	en
dc.subject.other	Mining	en
dc.subject.other	Numerical methods	en
dc.subject.other	Plants (botany)	en
dc.subject.other	Room and pillar mining	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Strength of materials	en
dc.subject.other	Water	en
dc.subject.other	Weathering	en
dc.subject.other	Abandoned mines	en
dc.title	Abandoned mine remediation measures by chamber filling with granular materials	en
heal.type	conferenceItem	en
heal.publicationDate	2007	en
heal.abstract	Left in place pillars of abandoned mines are subject to weathering (e.g. action of water, bacteria) that degrade their mechanical strength and eventually lead to collapse. A simple weathering model is proposed, that is governed by three parameters: the rate of progression of weathered front, the sharp loss of strength as the rock is wetted and the rate of degradation of the compressive strength with time. An axisymmetric analysis is performed and the variation with time of the bearing capacity of the pillar is given. Experimental data of the tests conducted on gypsum specimens attacked by water are presented and used for estimating the time to failure of an abandoned gypsum mine in Northern Italy. In order to avoid catastrophic collapses, a common remedial measure consists in filling the flooded chambers with granular materials. The aim of this paper is that of investigating the effect of the mechanical characteristics of the filler on the time of mine collapse, induced subsidence and pore water pressure generation. One dimensional consolidation theory is used for the determination of the proportion of overburden weight carried by the solid skeleton of the filler and by water pressure. A parametric analysis is eventually performed for the case of an abandoned gypsum mine in order to determine the most appropriate characteristics of the filler material. © 2007 Taylor & Francis Group.	en
heal.journalName	Proceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10	en
dc.identifier.spage	365	en
dc.identifier.epage	371	en