... temperatures respectively of 50 and 90°C) and thermo-chemical treatment. Thermo-chemical treatments were performed by soaking the specimens in a 5x10 −6 mol/l solution of sulphuric acid at pH=5 to simulate the acid rain behavior, at constant target temperatures, for one week. In general, for each weathering...

... of numerical simulation, the width of the Ionakhsh Fault together with the crushing zone was taken as 20 m. For all rocks it was accepted: Young modulus – 3000 MPa; Poisson’s ratio - 0.3; density - 2.6 g/cm 3 . Horizontal compressive tectonic force was given as 12 MPa. The simulation showed that the dynamic...

... and Biotite minerals, is taken as linear elastic but heterogeneous and anisotropic. Temperature dependence of material properties is neglected. The simulation demonstrates that the secondary stresses arising from converse piezoelectric effect are three orders of magnitude smaller than the primary thermal...

... simulations to predict the unconfined compressive strength (UCS), Young’s modulus (E) and Poisson’s ratio ( v ) of a PFC3D model for a given set of 15 microparameter values. Unlike other ANN-based DEM calibration methods, the proposed method calibrates microparameters by optimizing the ANN inputs rather than...

... halite rock engineering storage cavern simulation europe government geological subdiscipline theory calculation investigation cavern contour Abstract Underground storage in salt caverns is a preferred method for the intermediate storage of natural gas to cover seasonal fluctuation...

... Abstract To realistically simulate fluid flow in fractured rock mass, a scheme to represent the discrete fracture networks (DFN) in the numerical model is of utmost importance. In this paper we discuss a workflow to implement a field-measurement based DFN into an FEM code (COMSOL Multiphysics...

...-porte gallery deformation rock engineering environmental science 833 installation simulation Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth and Environmental Science 833 (2021) 012105 doi:10.1088/1755-1315/833/1/012105 Insights on squeezing...

... theory calcareous mudstone environmental science 833 degradation kpa rock engineering specimen stiffness geologist europe government geological subdiscipline subtype simulation plasticity Mechanics and Rock Engineering, from Theory to Practice IOP Publishing IOP Conf. Series: Earth...

... the force-displacement response of an anchored mesh panel to an out-of-plane load, extending the experimental standard punch test characteristic values (ISO 17745, ISO 17746, UNI 11437) to field conditions. Discrete element simulations are used to provide analytical relations that account for the effect...

... simulation evaluation trajectory resistance rockfall Abstract The present study shows the result of a rock fall hazard evaluation of the area downstream the Norman Castle that overlooks Forza d’Agro (Messina Province – Italy). The study was aimed at evaluating the penetration capacity...

... the triggering of the event. The latter is a depth-averaged numerical model that simulates the event runout, and whose parameters are calibrated through back-analysis. The applicability of the two combined approaches is tested through modelling of an historical event in Southern Italy, which was characterized...

... (i.e., tertiary creep, or the accelerating strains that occur prior to failure). In this work, the Distinct-Element Method (DEM) approach is employed, in conjunction with Rate Process Theory (RPT), to simulate the effect of rock creep in deep tunnels. To do that, the DEM models are constructed using...

... consisting of sprayed concrete and a waterproof sprayed membrane. Numerical distinct element modelling in 3DEC is used to simulate the groundwater pressure. The results are compared to existing groundwater pressure measurements performed behind the lining. The construction damage zone (CDZ) is included...

... test rig relative deflection reinforcement structural geology disc force simulation vertical force deflection upstream oil & gas cutter force subsurface engineering deformation behaviour sensor documentation measurement system loading eurock 2020 tunnel boring machine ©...

... 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...

.... social responsibility isotherm boundary renewable energy borehole oosterbaan granite underground thermal energy storage sustainability Helsinki conductivity storage sustainable development thermal conductivity University water store Simulation thermal property procedia engineering 191...

... dissipation, kinetic energy and damping dissipation. The proposed energetic approach is verified by computing the energy balance of the system during simulations of compression, tension and shear tests. 1. Introduction Rockburst is a sudden and violent phenomenon resulting from high concentration...

.... We conducted distinct element method-based numerical simulations to explore the behavior of hydraulic fracture propagation and containment under varying in-situ stress conditions and fluid injection rates. The results revealed that even a small contrast of minor principal stress between pay-zone...

... hot storage heat exchanger prototype fluid modeling production logging Discharge diffusive hot storage geothermal exchanger geostock exchanger production monitoring Upstream Oil & Gas Simulation heat transfer procedia engineering 191 ground heat storage storage Energy Storage...

... Abstract Discontinuum and continuum modelling approaches were used to simulate the single- and multi-stage hydraulic fracturing. Twodimensional discontinuum modelling of single-stage fracturing revealed a marked modification of the stress field in the vicinity of the fracture (stress shadow...