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Keywords: rock mass
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0016
... compression tests, and finally stress analysis. Under field investigations, scan-line mapping of joints indicated few major joint sets in the surrounding rock mass to the rockburst location. Stress analysis showed very high stresses in the chain pillars and low stress concentration at the rockburst site...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0041
... groundwater levels. While groundwater inflow was not a major concern to the operation, the ambient hydrogeological conditions and depth of mining below groundwater combined to produce the presence of groundwater pressure in the rock mass. As a result, the new mine design involving buttress removal was...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0095
... Upstream Oil & Gas failure mode hydropower station Reservoir Characterization Engineering strength parameter argillaceous siltstone structural geology cohesion sandstone safety factor stability rock mass weak interlayer mechanical parameter Artificial Intelligence interlayer...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0030
... ABSTRACT: Many gold and base metals deposits in Western Australia are hosted in anisotropic rock masses. These may comprise bedded siltstones, sandstone and shales or foliated mafic and ultra-mafic rocks. When bedding or foliation are unfavorably oriented, slope instability mechanisms...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0214
... simulation microstructure change flow in porous media Upstream Oil & Gas flow path fracture network diameter hydraulic fracturing Fluid Dynamics porosity rock permeability MPa tortuosity rock mass complex reservoir healing rate fluid pressure specimen healing evolution helical tube...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0250
... pressure of hydraulic fracture. A fully coupled lattice model, based on the distinct element method (DEM) and synthetic rock mass (SRM), was used for the simulations. XSite, a new, lattice-based software by Itasca was used in this study. The model input data was taken from 1D mechanical earth models (MEM...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0135
... location of damage events track the intensity/density of rock damage as the simulation progresses and relate these changes to the modelled pillar strength. The results of this synthetic rock mass pillar study provide useful insights on damage evolution and rock bridge strength characterisation in pillars...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0345
... ABSTRACT: A fracture network model provides a wealth of information concerning the characteristics of a rock mass, including fracture intensity, block size, and connectivity. This paper identifies methods to utilize information derived from DFN models. The fracture intensity of a DFN can be...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0139
... fracture proceedings rock mass fracture 1. INTRODUCTION Wellbore studies provide some valuable information regarding the stresses acting in the upper layers of the Earth s crust. In the recent releases (Heidbach et al., 2016) approximately 15% of all the data on stresses in World Stress Map database...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0346
... fracture network. How a rock mass reacts to a blast is dependent on the rock itself and on the discontinuities within the rock mass. A set of discrete fracture network (DFN) realizations generated and assessed using MoFrac are used to derive inputs for a RES fragmentation interaction matrix. Parameters...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0275
... valley. The rock mass properties and environmental conditions of the area were gathered from literature to conduct a preliminary stability assessment of the fractured cliff above the 18 th Dynasty tomb KV42 constructed for Hatshepsut-Meryet-Ra, the wife of Thutmose III, reused by a mayor of Thebes...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0262
... ABSTRACT: The law of hydraulic pressure in the cracks is the basis for studying the hydraulic fracturing of rock mass and concrete. According to the characteristics of hydraulic fracturing of high dams and deep tunnels, the flow model of the fractures under constant water pressure is...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0311
... ABSTRACT: In order to investigate the stress distribution characteristics and deformation failure law of micro-coal structure under loading, a digital model that can characterize the true pore structure of coal and rock mass is constructed by combining computed tomography (CT) scanning and 3D...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0304
... environments that have produced discontinuous fault systems in massive to moderately jointed but complexly veined rock masses. Rock mass characterization in such veined rock masses is challenging and requires attention to vein and open discontinuity data from both a data collection and interpretation...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0429
... ABSTRACT: Rock bolt is one of the major support systems of tunnel engineering. It is used to stabilize suspended rock blocks around an excavation section, reinforce rock mass, and reduce displacement along rock joints. This study proposed a rock bolt model, which includes two parts: a bolt...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0384
... ABSTRACT: This study has analyzed 3D stress and displacement distributions around a retreating longwall face intercepted by a geological fault. Analyses considered longwall set-up and development entries, and the longwall face. Linear elastic rock mass behavior was used for analysis except in...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0471
... ABSTRACT: This paper presents a comprehensive investigation regarding rock mass stability of tunnels excavated in faulted zone. The investigation features a typical Chinese procedure that addresses the support design of large tunnels in difficult grounds. Site survey, mechanical tests...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1917
... efficient and safe perspective. Therefore, this article aims to contribute for mineral operations management on reducing rockfalls hazards. Reservoir Characterization rockfall attenuation curve Artificial Intelligence attenuation metals & mining particle velocity coefficient rock mass...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1978
... ABSTRACT: The impact of rock falls on people, manmade infrastructures, and inhabited areas is considered in this paper, with examples taken from practice and personal experience. Both conventional and advanced investigation methods to study and characterize the rock mass and define the likely...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1903
... excavations, pose a threat to human population or interrupt mining activities are called rockbursts that are related to rock mechanics and geophysics. To monitor the state of the rock mass, knowing its response to the mining applied in presence of different hydrothermal bodies and the occurrence of large...

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