The elusive load transference of stratified rock roof

Yiouta-Mitra, P; Sofianos, AI

dc.contributor.author	Yiouta-Mitra, P	en
dc.contributor.author	Sofianos, AI	en
dc.date.accessioned	2014-03-01T02:53:29Z
dc.date.available	2014-03-01T02:53:29Z
dc.date.issued	2011	en
dc.identifier.issn	08950563	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36358
dc.subject	Load transfer	en
dc.subject	Mining	en
dc.subject	Rocks	en
dc.subject	Roofs	en
dc.subject.other	Average force	en
dc.subject.other	Bolting system	en
dc.subject.other	Elastic beam	en
dc.subject.other	Finite difference	en
dc.subject.other	Load transfer	en
dc.subject.other	Load transference	en
dc.subject.other	Mechanical behavior	en
dc.subject.other	Per unit	en
dc.subject.other	Stratified rocks	en
dc.subject.other	Stress functions	en
dc.subject.other	Underground opening	en
dc.subject.other	Varying thickness	en
dc.subject.other	Vertical stress	en
dc.subject.other	Civil engineering	en
dc.subject.other	Geotechnical engineering	en
dc.subject.other	Mine roof control	en
dc.subject.other	Roofs	en
dc.subject.other	Loads (forces)	en
dc.title	The elusive load transference of stratified rock roof	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1061/41165(397)264	en
heal.identifier.secondary	http://dx.doi.org/10.1061/41165(397)264	en
heal.publicationDate	2011	en
heal.abstract	A roof of an underground opening composed of horizontally bedded competent rock is commonly encountered in mining and civil engineering. The mechanical behavior of such roof resembles a stack of elastic beams rigidly or compliantly confined at the abutments and sagging under their own weight. The clamping action of a bolting system will forestall slip between strata. When the strata vary in thickness, it has been largely assumed that considering friction and suspension effects, the average force per unit area exerted by the bolt system should include an elusively defined transferred load Δq. The purpose of this research is to analytically and numerically calculate this transferred load, taking into consideration all related parameters. A stress function solution of a gravity beam is proposed to account for the load transference, i.e. the vertical stress component sgr;yy. A two-member stratified roof with strata of varying thickness is then modeled with a finite differences code and the results are used to verify the assumptions. Limits of applicability of load transference are prescribed for the specific cases that are analyzed. © 2011 ASCE.	en
heal.journalName	Geotechnical Special Publication	en
dc.identifier.doi	10.1061/41165(397)264	en
dc.identifier.issue	211 GSP	en
dc.identifier.spage	2584	en
dc.identifier.epage	2593	en