... Abstract This study focuses on the mechanical parameters of Miocene limestones from Hungary. Four different lithotypes of porous limestone from two localities were analysed in laboratory conditions. These lithologies have been widely used for centuries as construction material in Central...

... for ‘Borriol’ limestone is studied for samples previously subjected to 200, 400, 600 and 800 °C and then cooled slowly (in air) or quickly (immersed in water). The results show that the static modulus of samples heated up to 600 °C decreased 80.9 and 79.1 % and dynamic modulus decreased 62.5 and 64.8...

... is to calculate the term of ϕ b from the Barton-Bandis’ equation and include the tilt angle α . Various tilt-test measurements were carried out with field blocks on both sides of the same joint, considering different lithologies (granite, limestone, andesite, dacite, coal and slate) and block sizes...

... Abstract This research evaluates the variation in the Drilling Rate Index (DRI) and its relationship with thermal damage on thermally treated rocks. Samples from ‘Prada’ limestone, a lower cretaceous formation in the southern Pyrenees (Lleida, Spain), were subjected to temperatures of 105, 300...

... 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...

... during sodium sulphate crystallisation cycles. Porous, Miocene limestone test specimens collected from the Sóskút quarry (Hungary) were subjected to salt crystallisation cycles in laboratory conditions. The limestone with open porosities of up to 32 V% is composed of ooids, various types of bioclasts...

... Abstract Over the last twenty years several major tunnel projects have been constructed in the Copenhagen area in the Danian limestone, either in the Copenhagen Limestone or in the Bryozoan limestone; in parallel, developments have been made in the characterization of these rocks. The Danian...

... Abstract In this research, the variation of thermal conductivity with temperature of a limestone and its relationship with porosity is studied. Samples from Prada formation, a lower Cretaceous limestone from the Catalan Pyrenees (Spain), obtained from the Tres Ponts road tunnel were subjected...

... reservoir heavy oil play environmental science 833 tunnel garzan limestone rock engineering theory injection mahop limestone reservoir geomechanics practice iop publishing iop conf application borehole excavation Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf...

... to the engineers focusing on such landslide problems. upstream oil & gas numerical analysis convergence measurement excavation structural geology anomaly solution alternative entrance limestone slope stability reservoir characterization displacement ground condition eurock 2020 new option...

...]. Indeed, this method has been used by [7] for the calculation of effective parameters of poroelastic composite materials. This method has also been extended in [8] to the case of viscoelatic microcracked materials. In our study, we considered an oolitic limestone as heterogeneous material. To verify...

... in instability processes, as evidenced by wide block-size talus distributed all along the coast line. These diffused instabilities are related to the predisponding geological setting of Malta Island, i.e. the over-position of grained limestone on plastic clay deposits, that induces lateral spreading phenomena...

..., challenges and limits of the applied methods, including future recommendations. The rock characteristics of the Copenhagen limestone, in regards to the performed rock grouting, are also discussed. 1. Introduction The Cityringen Metro is expected to be running in 2019 and will consist of two single tracks...

... Abstract The results of physico-chemical characterization of limestone samples come from the Mesosoic limestone deposit areas in the region of Berbera (Republic of Somaliland) were reported in this paper. The chemical analysis was carried out by X-ray fluorescence analysis, FT-IR spectroscopy...

... performed on Malm limestones and dolomites. The rock samples were characterized by uniaxial compressive strength (UCS), tensile strength, Young's Modulus, Poisson's ratio, bulk density, porosity and ultrasonic p- and s-wave velocities. Additionally water-permeability was measured in a triaxial cell under...

... risk assessment displacement diameter rock formation axisymmetric model dacite rock quality numerical modeling mineralization limestone Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1...

... the relationship between UCS and BTS. The study of SeshaPhani et al. (2013) is on concrete and the studies of Nazir et al. (2013) and Arioglu & Tokgoz (2011) are limited specific rock types, including limestone and rocks from the North Anatolian fault zone, respectively. However, the study of Altindag...

... Upstream Oil & Gas Rock mechanics characteristic reservoir geomechanics fossil fragment specimen crack propagation graphite vein Reservoir Characterization strength initiation crack initiation value propagation stress level orientation variation threshold limestone...

... GEOLOGICAL CHARACTERISTICS The Gargano promontory is the most northern and ele- vated area of the Apulian foreland (southern Italy). Its structure is constituted by a succession of dolomitic limestone sediments (Jurassic and Cretaceous age), 659 Figure 2. Simplified Gargano geologic map (Bosellini & Morsilli...

...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 The evaluation of stability of overhanging Ryukyu limestone cliffs utilizing rock mass characteristics inferred from RMQR and intact rock Ö. Aydan & N...