... Abstract Construction work above previous mining area is always a great challenge from the engineering point of view. In the southern part of Budapest, the previous mining activities resulted more than a hundred thousands of square meters of cavities. These cellars cut into porous limestone...

... Abstract The historical centre of the city of Naples is characterised by a network of underground anthropogenic cavities. Most of these cavities are stable and safe but sometimes for several reasons they are at least partially responsible of the occurrence of instability phenomena...

... Abstract In this paper, a numerical investigation of uniaxial compressive tests on prismatic specimens with single cylindrical pre-existing cavities in brittle rock is performed. To investigate the rock fracture around cavities and to assess the potential of the numerical model to simulate...

... Abstract Interpretations of cavity expansion tests (pressuremeter, radial jack, etc.) are based (in most occasions) on the analysis of the deformability of a cylindrical cavity in a continuous, isotropic, and homogeneous medium. However, many rock masses show an anisotropic behaviour due...

... such as cavities and faults in front of a tunnel face can cause surface settlement and sinkholes due to cavity collapse and the inflow of geo-materials (sand, silt, and clay) inside the cavities and faults. These phenomena increase the construction cost and time and can cause casualties. Settlements in squeezing...

... of instabilities. The goal-output end of the investigation is to represent each of the cavities and sections by a point on a graph (size cave and rock quality) different if these are stable or unstable. A separation line (based on empiricism) between stable and unstable or collapsed caves is established. The line...

... where two proposed route options are under consideration, as shown in Figure 1. sanral information coal seam metals & mining subsurface ermelo ring road ring road ground geophysics Borehole geophysics airborne geophysics novel investigation investigation cavity Drilling...

... Abstract In this paper, a numerical investigation is performed for the size and stress gradient effects on the fracture initiation and propagation around single pre-existing cavities in brittle rock. A distinct elements code is used to perform the numerical simulations. To investigate the rock...

... metals & mining criterion overstress Reservoir Characterization overburden progressive subsidence geometry analytical solution the valley Upstream Oil & Gas triangular cavity eurock 2012 rock mass cavity overburden formation limestone reservoir geomechanics massivity...

...Rock Mechanics in Civil and Environmental Engineering Zhao, Labiouse, Dudt & Mathier (eds) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-58654-2 Monitoring of ground failures in subsurface complex cavities C. Nadim, P. Bigarré & F. Lahaie INERIS, Ecole des Mines de Nancy, Nancy, France...

... and the effect of filling these cavities as a counter measure. Following these stability assessment studies, three dimensional elasto-plastic static and dynamic analyses of the Gushikawa castle remains with two karstic caves were analyses under present natural state and filled state. Numerical analyses showed...

... is described. Upstream Oil & Gas Reservoir Characterization diaphragm wall karst-prone rock evaluation cavity karstic-leaching process fine-grain soil hazard anti-karst protection formation limestone footing deposit limestone Moscow site investigation deep excavation limestone bed...

... be the sinkhole. A footing reinforces the ground and stops a sinkhole outside right on the periphery of the structure footprint. Photos of actual sinkholes and FEM simulation graphs are given to support these statements. periphery soil dia cavity periphery plastic zone project design Reservoir...

...387 Rock Engineering in Difficult Ground Conditions Soft Rocks and Karst Vrkljan (ed) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-80481-3 Borehole radar cavity and discontinuity assessment in dolomite for Gautrain R. Tosen Bombela Civil Joint Venture, Johannesburg, South Africa R.B...

... excavation of the top heading, large karst cavities with widths of up to ten metres were encountered. The karst cavities were found to be part of an approx. 500–m–long cave. Further huge karst cavities were encountered with an overburden of about 8 m above the tunnel crown. structural geology karst...

... by brittle failure within the chalk material of the bell-shaped caves. cavern experiment geometry Reservoir Characterization bell-shaped cavern nanoseismic monitoring source process pre-collapse detection international journal chalk Tsesarsky cavity Upstream Oil & Gas brittle failure...

... Abstract Methods of foundation calculation on the karsted areas are presented. These methods are based on the analytical investigations with the use of decisions for the beams and slabs on an elastic base and the numerical modeling of a base above the karst cavity with the use of finite...

... geology stress Redistribution soft rock cavity overburden outer sidewall Particle structure excavation pillar thickness Eurock 2005 -Impact of Human Activity on the Geological Environment - Konecny (ed) © 2005 Taylor & Francis Group, London, ISBN 04 1538 042 1 Behaviour of soft rock around...

... for t.he mining lI1dustry. Meanwhile the solution cavity ofsaltdeposit.s is regarded as an ideal host for oil and gas reposi- tories due to its advantageous geological conditions and physical-mechanical characteristics [see Langer, 1993; Fuenkajorn, 1993; Staudtmeister, 1997]. In order to improve...

...Eurock 2005 -Impact of Human Activity on the Geological Environment - Konecny (ed) © 2005 Taylor& Francis Group, London, ISBN 04 1538 042 1 Stability assessment of a tunnel constructing above mined cavities w.K. Song & S.K. Chung Korea Institutes of Geoscience and Mineral Resources, Daejon, Korea...