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Keywords: velocity model
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Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-493
... different responses to similar mining methods, quantified by the rates, magnitudes, and locations of the events. metals & mining real time system seismic deployment deployment algorithm US government Upstream Oil & Gas gateroad instrument seismic event velocity model sensor...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0037
... Artificial Intelligence metals & mining Reservoir Characterization optimization problem Upstream Oil & Gas dimension velocity model model space event location US government objective function correct model synthetic case catalog vertex algorithm station delay stope new...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-149
... machine learning Artificial Intelligence seismic event location baseline model metals & mining NonLinLoc velocity model Upstream Oil & Gas mined panel velocity decrease Reservoir Characterization velocity structure proceedings seismicity unmined coal cross section lvz...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-525
... accuracy of the velocity model being used. Example of the use of a 3D velocity model (3DVM) for a block cave mine with complex geological blocks with different properties and a large cave void was shown by [2] to result in a 47% improvement in location accuracy. Also the move to mixed uniaxial and triaxial...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-394
... strain/stress changes in the monitored volume. waveform velocity model brine well monitoring sensor salt cavern frequency content upstream oil & gas microseismic system mechanism cavern seismic activity borehole sinkhole seismic system operation seismic event location accuracy...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-800
... anisotropic velocity perturbations around salt. 1. INTRODUCTION The work of this paper contributes to the general topic of improving the seismic imaging of complex subsurface structures. Combining improved subsurface velocity models and more accurate migration algorithms, new wide-azimuth seismic...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7530
... Abstract An optimized velocity model is an important step towards the goal of accurate and precise seismic results. The assumption of a single or layered velocity model is not always appropriate in examples such as rock volumes that contain complex shaped geological units or large voids. For...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-614
... imaging. One confounding element is accounting for the natural heterogeneity of the subsurface velocity model. In our proposed method, we simultaneously solve the problems of wave propagation around a void and through a heterogeneous embedding medium. We generate a range of three-dimensional, synthetic...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-653
... Upstream Oil & Gas plume ray path coverage time 1 Time Period velocity zone Reservoir Characterization concentration Desert Creek reservoir co 2 low-velocity zone velocity model arrangement tomogram injection geophone array low velocity zone tomography velocity change...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-478
... acoustic event velocity model Kaiser effect Upstream Oil & Gas experiment geometry acoustic emission localization Visualization hydraulic fracturing pressurization acoustic emission event stress concentration wellbore Reservoir Characterization propagation localization...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-406
... node homogeneous velocity model seismicity Reservoir Characterization calculation geometry excavation Upstream Oil & Gas information application real time system computer graphic velocity model open-pit application inhomogeneous raypath effect travel time open-pit seismicity...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-045
... piezoelectric sensors that generate and receive high frequency acoustic waves. We measure the travel times of the acoustic waves through a specimen and then use a commercially available tomography software package to invert the data. The inverted velocity model is in turn used to locate the voids within the...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-299
... overburden Geomech Upstream Oil & Gas Imaging Reservoir Characterization Abstr mining face Rock Mech velocity model rock mass metals & mining abutment stress material property Redistribution imaging mining-induced change tomogram local earthquake tomography seismic event...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1019
.... Upstream Oil & Gas Imaging receiver data processing Reservoir Characterization anomaly ground condition boundary seismic reflector reflection coefficient TBM Artificial Intelligence site 1 velocity model gravel bed geological information Hammer Source reflectogram trt reflectogram...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1321
... & Gas metals & mining US government Reservoir Characterization bump sandstone coal bump seismicity Castlegate strata velocity model event location normalized event location seismic event vertical view parallel seismic activity panel 2 Occupational Safety and Health seam longwall...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0583
... Upstream Oil & Gas information Reservoir Characterization lithologic feature transition zone exploratory study facility US government borehole three-dimensional tomographic imaging tomographic image niche Alcove velocity zone application Hanna tomogram velocity model...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-1113
... an average isotropic velocity model and the measured 3D anisotropic velocity. The average source location error for manually picked data was 38 ft for the constant velocity model and 8 ft for the measured 3D velocity structure. Almost all microseismic systems in hard-rock mines utilize an isotropic...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-1087
... times from these events to construct a crustal velocity model for the Coeur d'Alene mining district which consisted of a halfspace with a P-wave velocity of 5.74 km/s. Mine-related events showed primarily dilatational first motions. Of 190 observed first motions, 171 (90%) were dilatations and 11 of 27...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-461
... velocity model hydraulic fracturing microseismic event calibration shot p-and s-wave velocity Upstream Oil & Gas source location hydraulic fracture operation rock mass hypocenter orientation experiment polarization analysis microseismic activity sensor first-arrival time injection...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0043
... ABSTRACT: This paper summarizes the theories developed for an innovative and automated source location technique including input data analysis, event based velocity model determination and reliability assessment of source locations. It also presents the GRC Source Location System, a computer...

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