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Keywords: assessment
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0066
... ABSTRACT: The feasibility and design of microfracturing formation stress tests requires an initial assessment of the conditions expected to be met in situ (state of stress, rock tensile strength, etc.). When data are scarce and such assessment is difficult, insight can be gained by reviewing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0256
... hazard is elevated after blasting. Therefore, the design of exclusions and re-entry procedures should be based on an assessment of the hazard and risk. The best exposure management procedures reduce the risk to a tolerable level with as small a disruption to the mining production as possible. There are...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2027
... been detected and characterized in terms of point cloud analysis and provide a qualitative hazard system to assess rockfall probability by extensive characterization and parametrization of the joint systems. Results have demonstrated the capabilities of combining UAV platforms with computer-based...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2057
... GSI rock mass characterization, based on the above-mentioned GSI quantification, utilizing both LiDAR and photogrammetry point clouds from several rock slopes. The proposed semi-automated methodology leads to the extraction of space-resolved GSI values for the entire slope, by automatically assessing...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2026
... aimed at assessing at a preliminary stage the stability conditions of a cave along with a safety margin with respect to the occurrence of failure. The charts have been defined upon the results of a large set of parametric two-dimensional finite-element analyses of ideal cases of underground cavities...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2163
... different transitioning operations require different, but complementary evaluations be undertaken of the stability of the surface crown pillars that exist within the transitions. This paper accordingly examines some aspects of analysis uncertainty related to undertaking these transition zone assessments...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2881
..., and at other mining operations. Upstream Oil & Gas metals & mining displacement manefay failure InSAR data manefay bed Artificial Intelligence manefay slide assessment machine learning interferogram mechanism slope failure satellite passive block Failure area rtkc Rio...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1604
... reduction of coal production costs, but also important for the assessment of environmental impact of mining. This assessment requires accurate simulation of complex, highly non-linear and irreversible processes of rock deformation and fracturing due to coal mining and subsequent impact on ground and surface...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1574
..., economics and other constraints to be quantified. Parametric assessments using numerical models are not new in rock mechanics and described as far backs as the 1980's. However, the uptake of parametrical assessments using numerical modelling for design and sensitivity assessments in the mining industry has...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1628
... ABSTRACT: In tunneling with TBMs, a reliable assessment of the TBM rate of penetration (RoP) is needed for planning, cost control or other decision making purposes. An incorrect estimate of the RoP could delay the project and induce unplanned costs, making the project less profitable. Thus...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1570
... ABSTRACT: Seismic hazards have become one of the common risks in underground coal mining and their assessment is an important component of the safety management. In this study, a methodology, involving nine fractal dimension-based indices and a fuzzy comprehensive evaluation model, has been...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1727
... ABSTRACT: The uncertainties related with spatial variability and heterogeneities, naturally present in rock masses, play an important role in geotechnical engineering practice. A more accurate assessment and characterisation is increasingly in need due to their impact on the mechanical...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-502
...) operations as an alternative to conventional PP&A methods and materials. It has been reported that this in fact facilitated the PP&A operations and resulted in considerable cost savings. The objective of this paper is to present the work done to assess the potential of the Gearle formation in the...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-881
... ABSTRACT: A workflow is presented to assess potential induced seismicity (IS) hazard associated with multi-well pad hydraulic fracturing stimulation, comprising steps of increasing sophistication which span easy-to-implement simple analytical screening tools to the application of a newly...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-958
... subsidence parameter prediction agioutantis mining metals & mining retreat mining SDP retreat mining step surface structure karmis assessment subsidence subsidence prediction mining step data mining surface deformation prediction system surface point time factor Scenario...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-983
... ABSTRACT: The extent of support in tunneling projects can vary greatly depending on the geological conditions, and in turn may greatly affect project costs. For the purpose of project pre-feasibility assessment, methodologies are proposed according to the tunnel construction method...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-468
... introduced and its characteristics outlined. Then, an overview of the available methods for assessing rock mass strength are presented to show the limitations of these methods in veined and especially WVR. The low strength estimates at both low and high confining pressures obtained by using the HB-GSI...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1172
... extraction is dictated by the predicted stability of the remaining pillars and of the resulting open stopes. Computer stress analysis methods are used to assess pillar stability, and the stability of the backs of the open stopes are assessed using empirical methods. This paper presents the evolution and...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-1050
... ground transportation road tunnel excavation lam tin tunnel Reservoir Characterization Upstream Oil & Gas assessment mtr tunnel tunnel excavation Hong Kong reservoir geomechanics influence water-oil saturation metro line water-oil saturation construction deformation rail...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0156
... assessment discontinuity Persistence data pit slope design ABSTRACT: Pit slope design relies on appropriate selection of design strength parameters. This selection is not trivial given the inherent heterogeneity of rock masses. In strong rocks, step-path failures may develop through combination...

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