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Keywords: explosion
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Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1998
... geothermal reservoir Simulation US government explosion stimulation experiment standoff distance multiple energetic source laboratory hydraulic fracturing waterless stimulation contour geometry damage zone deformation parametric study strain rate PMMA Lawrence Livermore national laboratory...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-568
... Abstract To understand shear wave generation observed during underground explosions several source-physics experiments (SPE) in fractured granitic rock mass were conducted at the Nevada National Security Site (NNSS). Fractured rock present challenges: fractures are poorly characterized and...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-809
... Abstract We present a mechanism for shear wave generation from buried explosions as part of the National Nuclear Security Administration (NNSA) Source Physics Experiment (SPE) series. SPE fielded various sized cylinder-shaped sensitized heavy ammonium nitrate/fuel oil (SHANFO) sources grouted...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-531
... ABSTRACT: In July 2008, five small (61 to 122 kg) chemical explosions were detonated in a low fracture density, homogeneous granite in Barre, VT. The physical properties of the granite were measured before and after the explosions on cores recovered in the vicinity of each shot. The changes in...
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-01-0369
..., implementation and calibration of a thermodynamically consistent constitutive model that incorporates these features. The paper also describes a computational study in which the model was used to perform numerical simulations of PILE DRIVER, a deeplyburied underground nuclear explosion detonated in granite at...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0027
... Characterization explosion discrete element pender numerical model Engineering Rock mechanics Heuze granite reservoir geomechanics Simulation piledriver continuum mechanics jointed rock mechanics Upstream Oil & Gas sulky nuclear obert pillar suggestion return acceleration vertical joint...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-0003
... and numerical simulations. In the applications field, much progress has been made in understanding and being able to predict rock mass behavior related to underground explosions, cratering, projectile penetra- tion, and defense nuclear waste storage. All these activities stand on their own merit as...
Proceedings Papers

Paper presented at the The 33rd U.S. Symposium on Rock Mechanics (USRMS), June 3–5, 1992
Paper Number: ARMA-92-0079
... phenomenon, its existence and characterization have been satisfactorily documented in the literature (Day et al., 1971; 1976; Jo Upstream Oil & Gas variation stress release structural geology Susceptibility Geophy stress variation wavelength component Reservoir Characterization explosion...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-045
... ABSTRACT: It has been postulated that a tamped explosion causes changes in the local in situ stress distribution, creating a residual stress field that may important to the containment of the explosion products. Changes in local in-situ stress orientations that are believed to indicate a...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-511
... ABSTRACT: A limestone for which mechanical behavior is well determined is used as a basis for a study of the effects of mechanical property variations on apparent seismic yield for contained nuclear explosions. The resulting variations in apparent seismic yield, up to 25% for this study, form...
Proceedings Papers

Paper presented at the The 29th U.S. Symposium on Rock Mechanics (USRMS), June 13–15, 1988
Paper Number: ARMA-88-0359
... ABSTRACT ABSTRACT We illustrate the application of discrete element modeling to the analysis of underground explosions which create ejecta and/or subsidence. Graphical results are presented for the effect of the same impulse at three successively increasing depths. We emphasize the...
Proceedings Papers

Paper presented at the The 27th U.S. Symposium on Rock Mechanics (USRMS), June 23–25, 1986
Paper Number: ARMA-86-0801
... been under study for some time. This rock chamber would have to be en- gineered to sustain the repeated mechanical and thermal shocks of internal explosions. In this paper, we summarize preconceptual studies performed in support of HEDEF, including ß simple dynamic calculations for internally loaded...
Proceedings Papers

Paper presented at the 19th U.S. Symposium on Rock Mechanics (USRMS), May 1–3, 1978
Paper Number: ARMA-78-0159
... ABSTRACT: A method to determine the residual shear strength of the fractured rock surrounding an explosion has been developed using measured or inferred cavity radii. The residual shear strength of the fractured rock, after passage of the initial shock wave, controls the subsequent motion of...
Proceedings Papers

Paper presented at the 19th U.S. Symposium on Rock Mechanics (USRMS), May 1–3, 1978
Paper Number: ARMA-78-0166
... ABSTRACT: Subsequent to the dynamic effects from a contained explosion in rock there remains a residual stress field around the cavity. This field is associated with the dynamic rebound of the cavity. Calculations show that the radial component of the residual stress field is compressive...
Proceedings Papers

Paper presented at the The 12th U.S. Symposium on Rock Mechanics (USRMS), November 16–18, 1970
Paper Number: ARMA-70-0403
.... The high pressure fiat jack devices were used as a site investigation tool to obtain rock mass properties. Tests were conducted before and after a 100 ton surface high explosive detonation test to assess explosive effects on the rock. It was conclusively demonstrated by these tests that meaningful...
Proceedings Papers

Paper presented at the The 9th U.S. Symposium on Rock Mechanics (USRMS), April 17–19, 1967
Paper Number: ARMA-67-0285
... explosion Rock mechanics total reaction time pulse shape pressure-time measurement Reservoir Characterization detonation velocity columnar charge near-spherical charge ncn water gel Upstream Oil & Gas decay factor peak pressure Symposium gage location red cross reaction time...
Proceedings Papers

Paper presented at the The 9th U.S. Symposium on Rock Mechanics (USRMS), April 17–19, 1967
Paper Number: ARMA-67-0321
...Chapter 17 ON THE CORRELATION BETWEEN EXPLOSIVE CRATER FORMATION AND ROCK PROPERTIES by P. F. Gnirk and E. P. Pfleider Consideration is given to creater formation with shallow, contained, chemical explosions in rock masses which exhibit different inherent physical and mechanical properties as...
Proceedings Papers

Paper presented at the The 8th U.S. Symposium on Rock Mechanics (USRMS), September 15–17, 1966
Paper Number: ARMA-66-0463
... Upstream Oil & Gas displacement particle Reservoir Characterization solid friction model dimension operational solution reservoir geomechanics explosion apparent crater breakage borehole sandstone velocity field Wellbore Design attenuation Wave Equation crater application...
Proceedings Papers

Paper presented at the The 6th U.S Symposium on Rock Mechanics (USRMS), October 28–30, 1964
Paper Number: ARMA-64-152
... ABSTRACT We have applied the following technique to an investigation of reservoir rock and salt samples subjected to the Gnome nuclear explosion. 1. Visual Observation 2. Microscopic Observations 3. X-ray Diffraction 4. Electron Microscopy 5. Porosity Determinations 6. Permeability...
Proceedings Papers

Paper presented at the The 4th U.S. Symposium on Rock Mechanics (USRMS), March 30–April 1, 1961
Paper Number: ARMA-61-171
... complex reservoir drift floor hydraulic fracturing cavity wall explosion plowboy contained tnt explosion fracture nuclear explosion discontinuity hobo shot 11 rubble shot 11 excavation cavity shock wave Upstream Oil & Gas diameter tuff carbon-filled fracture void...

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