... Abstract A stability analysis on the possibility of using room and pillar underground mining method, in a marble quarry in Alentejo (Portugal) with backfill, is presented. Given the data provided by the laboratory tests over marble samples and in situ tests as well as a thoroughly geology...

... ABSTRACT: Stabilization of mine stopes with cemented paste backfill (CPB) has become a common practice across the mining industry due to its effectiveness, low cost and ease of use. Furthermore, backfill imposes stresses on the surrounding rock mass and barricades by complex interaction...

... ABSTRACT: In mechanized tunnel drives in hard rock conditions, the gap between the installed lining segments and the excavation boundary is usually backfilled with pea gravel. For sound numerical calculations on the deformation behavior of the precast lining segments, the interaction between...

... deformation backfill NE slope tertiary sediment Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 The toppling of large blocks on the northeast slope of the Meirama mine C. Manera...

... Characterization strength subsidence curve backfill ground transportation construction rock layer tunnel ground subsidence deformation wanlong subway line excavation diagram settlement Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group...

... metals & mining stability analysis cement content MPa rock mass Reservoir Characterization strength cohesion Rockfill backfill laboratory test hydraulic fill stress state Parameter study stope global model exposure sequence pillar rockfill pillar principal stress tensile...

... ABSTRACT: This paper describes a numerical modelling exercise carried out for a massive tabular orebody mine. Mining to date has taken place by means of room and pillar mining, with the recent introduction of backfill and pillar extraction. To access extensions to the orebody, mining has...

... ABSTRACT: This paper presents the evaluation techniques of different marble waste materials as cemented backfills for Ordinary Portland Cement contents (OPC) and curing times in terms of stability and support performances underground. Various stope layouts, the effects of loading on the fill...

... backfill laboratory experiment Upstream Oil & Gas Mean stress triaxial test compression rock salt extension Ghoreychi Eurock '96, Barla (ed.) © 1996 Balkema, Rotterdam. ISBN 90 5410 8436 Instantaneous plasticity and damage of rock salt applied to underground structures Endommagement et...

... ABSTRACT: In the German concept for the direct disposal of spent fuel, the fuel rods are to be placed in Pollux casks in drifts in salt rock, which are then backfilled with crushed salt. A demonstration of this is being conducted in the Asse salt mine to test the thermomechanical behavior...

... ABSTRACT: For the description of the compaction behavior of crushed rock salt for use as a backfill material in underground radioactive waste repositories, a constitutive model is proposed based upon phenomenological and theoretical considerations and experimental results. It can be shown...

... mina Pirite Alentejana operation metals & mining cable bolt hangingwall geometry backfill Reservoir Characterization Moinho recovery stape Orebody long hole sublevel exploitation skin pillar Upstream Oil & Gas mining method primary stape sublevel pillar Eurock '93...

... cement formulation strength backfill plant sample characteristic cement chemistry hydraulic backfill waste rock cement property casing and cementing Portugal dilution metals & mining underground sample backfill practice stope jo 0 composition filling backfill discharge...

.... The use of this type of prop has become standard practice in many gold mines, and has improved safety conditions in the stope face area considerably. Backfill: tailings backfill programmes, as a means of providing support in the tabular stoping areas of deep gold mines, were initiated about 10 years ago...