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Title: On the generation of horizontal shear waves by underground explosions in jointed rocks

Abstract

This paper describes computational studies of non-spherical ground motions generated by spherical explosions in a heavily jointed granite formation. Various factors affecting the shear wave generation are considered, including joint spacing, orientation, persistence and properties. Simulations are performed both in 2D for a single joint set to elucidate the basic response mechanisms, and in 3D for multiple joint sets to realistically represent in situ conditions in a realistic geologic setting. The joints are modeled explicitly using both contact elements and weakness planes in the material. Simulations are performed both deterministically and stochastically to quantify the effects of geologic uncertainties on near field ground motions. The mechanical properties of the rock and the joints as well as the joint spacing and orientation are taken from experimental test data and geophysical logs corresponding to the Climax Stock granitic outcrop, which is the geologic setting of the Source Physics Experiment (SPE). Agreement between simulation results and near field wave motion data from SPE enables newfound understanding of the origin and extent of non-spherical motions associated with underground explosions in fractured geologic media.

Authors:
 [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1418918
Report Number(s):
LLNL-JRNL-657867
Journal ID: ISSN 0956-540X; TRN: US1801313
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Journal International
Additional Journal Information:
Journal Volume: 200; Journal Issue: 3; Journal ID: ISSN 0956-540X
Publisher:
Oxford University Press
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 98 NUCLEAR DISARMAMENT, SAFEGUARDS AND PHYSICAL PROTECTION; underground explosion; shear wave; joints

Citation Formats

Vorobiev, Oleg, Ezzedine, Souheil, Antoun, Tarabay, and Glenn, Lewis. On the generation of horizontal shear waves by underground explosions in jointed rocks. United States: N. p., 2015. Web. doi:10.1093/gji/ggu478.
Vorobiev, Oleg, Ezzedine, Souheil, Antoun, Tarabay, & Glenn, Lewis. On the generation of horizontal shear waves by underground explosions in jointed rocks. United States. doi:10.1093/gji/ggu478.
Vorobiev, Oleg, Ezzedine, Souheil, Antoun, Tarabay, and Glenn, Lewis. Wed . "On the generation of horizontal shear waves by underground explosions in jointed rocks". United States. doi:10.1093/gji/ggu478. https://www.osti.gov/servlets/purl/1418918.
@article{osti_1418918,
title = {On the generation of horizontal shear waves by underground explosions in jointed rocks},
author = {Vorobiev, Oleg and Ezzedine, Souheil and Antoun, Tarabay and Glenn, Lewis},
abstractNote = {This paper describes computational studies of non-spherical ground motions generated by spherical explosions in a heavily jointed granite formation. Various factors affecting the shear wave generation are considered, including joint spacing, orientation, persistence and properties. Simulations are performed both in 2D for a single joint set to elucidate the basic response mechanisms, and in 3D for multiple joint sets to realistically represent in situ conditions in a realistic geologic setting. The joints are modeled explicitly using both contact elements and weakness planes in the material. Simulations are performed both deterministically and stochastically to quantify the effects of geologic uncertainties on near field ground motions. The mechanical properties of the rock and the joints as well as the joint spacing and orientation are taken from experimental test data and geophysical logs corresponding to the Climax Stock granitic outcrop, which is the geologic setting of the Source Physics Experiment (SPE). Agreement between simulation results and near field wave motion data from SPE enables newfound understanding of the origin and extent of non-spherical motions associated with underground explosions in fractured geologic media.},
doi = {10.1093/gji/ggu478},
journal = {Geophysical Journal International},
number = 3,
volume = 200,
place = {United States},
year = {2015},
month = {2}
}

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Cited by: 10 works
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