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Keywords: pillar
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-624
... of highwall mining experience at four Australian mines, with focus on geotechnical issues affecting mining performance. The paper also summarizes one case study, which involved major pillar/roof instabilities. The aim of the review and the case study is to assist the highwall mining industry to learn from...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-564
... quarries concerns good quality rock masses. In most cases, underground excavations are in fact supported by natural structures (pillars or barrier pillars), obviously when more than one void is present (e.g. the Carrara marble basin). In some particular cases, single openings are considered as caverns...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-016
... reservoir geomechanics strength percentage extraction Fracture Zone data mining cone extraction pillar stress Reservoir Characterization Wellbore Design pillar Thickness mining method span south division South Africa metals & mining Upstream Oil & Gas criteria reef...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-021
... Reservoir Characterization footwall Upstream Oil & Gas metals & mining structural geology displacement mechanism quartzite stope face VCR foundation failure closure ride station reef horizon haulage pillar pillar foundation failure intermediate depth shale seismicity...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-033
... stope pillar failure hangingwall stiffness regional stability pillar Upstream Oil & Gas tremor height ratio Crush Pillar Failure barrier pillar Reservoir Characterization footwall investigation pillar stiffness mining pillar area mechanism closure Impala intensity...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-007
... a ventilation shaft sited 40 m NE was sunk to 1102 m. Both shafts are sited in a pillar which takes the form of an ellipse approximatly 480 m on strike and 450 m on dip. The strike of the stratum is east - west and the strata dips at an average inclination of 16 degrees to the south. HISTORY Instability...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-027
... development in the form of tertiary vertical shafts was necessary to enable mining in the lower sections of the CLR-horizon. (Figure in full paper) The mine adopted a longwall mining system in which approximately 75 % of alliongwalls are protected by systematic stabilizing pillars. Mini-longwalls consisting...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-042
... reservoir geomechanics stability condition specimen vorkshop area strength programme investigation yorkshop area cable Reservoir Characterization displacement convergence MPa pillar deposit stabilization measure Upstream Oil & Gas Workshop Area layout pillar 4 stress...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-038
... metals & mining coal pillar extraction maingate reservoir geomechanics pillar failure site seam lower seam pillar lower seam pillar visual observation Reservoir Characterization pillar failure seam pillar tailgate Sigma Colliery pillar panel bord bottom seam pillar...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-039
... reservoir simulation roof deflection extraction successive mining step initial roof deflection adjacent pillar longterm behaviour intersection roadway metals & mining colliery numerical simulation deflection closure strength variation south african colliery pillar extraction...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-030
... ABSTRACT: This paper describes a pillar layout design methodology for the mining of relatively shallow tabular deposits. Simplified procedures and formulae are proposed to estimate complete in situ load-deformation characteristics of pillars. The roles of regional, non-yield and yield pillars...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-020
... ABSTRACT: Early shaft reef extraction would appear to provide a key to successful protection of vertical shafts and major service excavations in mines at great depth. This concept has been adopted at Western Deep Levels South Mine in preference to a more traditional shaft pillar approach...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-169
... region "Werra" in the southwestern part of the GDR. The event in the Village Völkers-hausen in the very epicenter had the intensity 8.5° (MSK-scale). In the mine "Ernst Thalmann", a mining area of about 6 km2 was destroyed in a depth of 700–900 m (room and pillar system). The seismic records...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-053
... on the pillar. The development of the brittle zones around the drifts as a consequence of the tensile stresses are determinated. 1 INTRODUCTION The reference concept for direct disposal of spent fuel consists of the emplacement of self-shielded containers (POLLUX-containers) on the floor of the storage...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-093
... per month. The mine experiences an increase of seismicity with depth which is re- n~cted in the support requirements for safe mining oper- allons. These circumstances led to the introduction of stabilizing pillars in 1980 and backfill in 1987. The seismic netWork of the mine records more than 560...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-079
... Modellierung des Bergbaues in grol3er Tiefe: Eine FaUstudie der Creighton- Mine T.D.Wiles Mines Research Department, INCa Limited, Ontario, Canada ABSTRACT: Non-linear analysis techniques are used to simulate a case history involving the yielding of a large crown pillar, and slip on a fault at INCO's Creighton...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-086
... and the reservoir occured to be hydraulically connected with salt mirror. Exploitation of the salt deposit was carried out in years 1920–1977 and 11.5 mil. tones of rock salt was mined using room and pillar stoping. The exploitation was started on 4-th level/depth 405m/going down to 9 th level/depth 544m/. In years...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-067
...Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989Balkema, Rotterdam. ISBN 90 61919754 Investigations into foundation failure mechanisms of hard rock squat rib pillars Etudes du mecanisme de rupture des appuis des piliers canoes en roche resistante Untersuchung des Grundbruchversagens von...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 12–16, 1988
Paper Number: ISRM-IS-1988-023
...) variant diameter bed coefficient electric power station strength chamber building coefficient pillar layout roundcylinder equation Reservoir Characterization chamber diameter investigation lower basin chamber stable structure Rock Mechanics and Power Plants, Romana (ed.) ~ 1988 Ba/kems...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 12–16, 1988
Paper Number: ISRM-IS-1988-026
... rock is of good value. Considering that the average density is 2.65 g/cm3 and the dynamic coefficient of Poisson 0,25 stratigraphy convergence crystalline limestone Upstream Oil & Gas marly clay muela power plant pillar cavern gallery access tunnel excavation work Reservoir...

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