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Sunday, July 5, 2020 | History

2 edition of Fracture detection in crystalline rock using ultrasonic shear waves found in the catalog.

Fracture detection in crystalline rock using ultrasonic shear waves

Kenneth Harold Waters

Fracture detection in crystalline rock using ultrasonic shear waves

by Kenneth Harold Waters

  • 305 Want to read
  • 33 Currently reading

Published by Dept. of Energy, Lawrence Berkeley Laboratory, Earth Sciences Division, for sale by the National Technical Information Service] in Berkeley, Calif, [Springfield, Va .
Written in English

    Subjects:
  • Rocks, Crystalline -- Testing,
  • Ultrasonic testing,
  • Shear (Mechanics)

  • Edition Notes

    StatementK. H. Waters and S. P. Palmer, Department of Materials Science and Mineral Engineering, University of California, Berkeley, and W. E. Farrell, Systems, Science, and Software ; prepared by the Lawrence Berkeley Laboratory
    SeriesSwedish-American cooperative program on radioactive waste storage in mined caverns in crystalline rock : Technical information report -- no. 19, LBL ; 7051
    ContributionsPalmer, S. P., joint author, Farrell, W. E., joint author, University of California. Dept. of Materials Science and Mineral Engineering, Systems, Science, and Software (Firm), Svensk kärnbränsleförsörjning AB, Lawrence Berkeley Laboratory. Earth Sciences Division
    The Physical Object
    Paginationvii, 46 p. :
    Number of Pages46
    ID Numbers
    Open LibraryOL14880598M

    A Fresh Look for Natural Fracture Characterization Using Advance Borehole Acoustics Techniques * Shear waves propagate through rocks with different velocities in different directions. rock, and the normal and tangential fracture-compliance parameters (Prioul et al., ). When several planar fractures of various. Wave propagation in isotropic media with two orthogonal fracture sets Shao, S. and L. J. Pyrak-Nolte, , Rock Mechanics and Rock Engineering, DOI /sz, 16 pages. Elastic Wave Propagation in Fractured Anisotropic Media (reprints available upon request) Pyrak-Nolte, L. J., Abell, B.C. and S. Shao, , CRC/Balkema “Rock.

    @article{osti_, title = {Seismic detection of a hydraulic fracture from shear-wave VSP data at Lost Hills Field, California}, author = {Meadows, M A and Winterstein, D F}, abstractNote = {The authors describe the results of a geophysical experiment in which shear waves (S-waves) were used to detect the presence of a hydraulic fracture in a diatomite reservoir at the Lost Hills by: The results showed that the amplitude decreases with the addition of the fouling layer (tar) seen in the L(0,5) mode with an increase in fouling thickness. Hay & Rose also investigated the use of Ultrasonic Guided Waves for fouling detection using a comb sensor operating at MHz attached to a stainless steel pipe. The longitudinal mode L(0,4.

    Aligned fractures induce anisotropy into rock mechanical properties. Seismic shear-wave splitting techniques have been used successfully to recover the symmetry-plane orientation and the magnitude of the shear-wave anisotropy. This orientation and magnitude correlate with the subsurface fractures' orientation and intensity. Shear-wave data are File Size: 7MB. Various fracture and fracture network wave-propagation phenomena, including tube waves, seismic focusing, interface waves, and guided waves, have been characterized in the laboratory and field (e.g., Hardin et al., ; Oliger et al., ; Shao and Pyrak-Nolte, ; Shao et al., ; Nakagawa et al., ).The size and density of fractures that can be seismically imaged in the field depend Cited by: 9.


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Fracture detection in crystalline rock using ultrasonic shear waves by Kenneth Harold Waters Download PDF EPUB FB2

One of the methods for fracture detection suggested has been the scattering and reflection of ultrasonic elastic waves. The method can operate with both source and receiver on the rock surface, or both transducers can be placed down a by: 3.

This research was initiated to investigate using ultrasonic seismic reflection techniques to detect fracture discontinuities in a granitic rock.

Initial compressional (P) and shear (SH) wave experiments were performed on a {times} {times} meter granite slab in an attempt to detect seismic energy reflected from the opposite face of the : S.P.

Palmer. The purpose of this experimental study was to test the application of ultrasonic reflection techniques in the detection of discontinuities or fractures in crystalline rocks. Experience, confirming theory, showed that P wave reflections in the frequency range required and with source(s) and receiver(s) on the same surface were difficult to observe due to undesired source resonances and/or strong Rayleigh by: 3.

Get this from a library. Fracture detection in crystalline rock using ultrasonic shear waves. [Kenneth Harold Waters; S P Palmer; W E Farrell; University of California, Berkeley. Department of Materials Science and Mineral Engineering.; Systems, Science, and Software (Firm); Svensk kärnbränsleförsörjning AB.; Lawrence Berkeley Laboratory.

FRACTURE DETECTION IN CRYSTALLINE ROCK USING ULTRASONIC SHEAR WAVES. Author(s): Waters, K.H. et al. Main Content Metrics Author & Article Info. CALCULATING AVERAGE HOT WATER MIXES OF RESIDENTIAL PLUMBING FIXTURES Using the ANSI Hot Water Draw Model and National Residential Data to Estimate Hot Water Use in Showerheads and Cited by: 1.

fracture detection in crystalline rocks using ultrasonic reflection techniques The purpose of this experimental study was to test the application of ultrasonic reflection techniques in the detection of discontinuities or fractures in crystalline by: 3.

fracture detection in crystalline rock using ultrasonic shear waves By K.H. Waters Topics: General and MiscellaneousAuthor: K.H. Waters. FRACTURE DETECTION IN CRYSTALLINE ROCK USING ULTRASONIC REFLECTION TECHNIQUES. Author(s): Palmer, S.P.

et al. Main Content Metrics Author & Article Info. Main Content. Download PDF to View View Larger. Thumbnails Document Outline Attachments. Previous. Next. Highlight all Match case. Whole by: 3. Geophysical Prospecting,59, – doi: /jx Detection of multiple fracture sets using observations of shear-wave splitting in microseismic data James P.

Verdon∗ and J.-Michael Kendall Department of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK.

Seismic wave propagation and digital image correlation were used during direct shear experiments on Indiana limestone specimens to investigate the stiffness of rock discontinuities (fractures. Ultrasonic surface-wave detection techniques in fracture mechanics Investigation indicates that a simple ultrasonic system of surface waves recently developed can accurately map out the crack-front geometries during its course of propagation C.

Ho 1 H. Marcus 2Cited by: 6. Fracturing of the rock mass is monitored using evidence of seismic anisotropy from estimates of shear wave splitting and their subsequent inversion for fracture parameters. The data set consists of. Nondestructive measurements of fracture aperture in crystalline rock cores using X ray computed tomography.

Robert A. Johns. Characterization of the effect of normal load on the discontinuity morphology in direct shear specimens using X-ray micro-CT. Six surface-geophysical methods were used to detect saturated fractures in the upper 60 m (meters) of bedrock at the U.S.

Geological survey's fractured-rock research site in the Mirror Lake area, Grafton County, New Hampshire. Crystalline bedrock, consisting of foliated schists intruded by granite, pegmatite, and gabbro, underlies 3 to 10 m of glacial drift throughout the study : F.

Haeni, John W. Lane, Christopher C. Barton, David A. Lieblich. 18 Ultrasonics: A Technique of Material Characterization Dharmendra Kumar Pandey 1 and Shri Pandey 2 1Department of Physics, P.P.N.

(P.G.) college, KanpurU.P., 2Department of Physics, University of A llahabad, Allahabad-U.P., India 1. Introduction The material science and characterization is a field concerned with inventing new materials. Fracturing of the rock mass is monitored using evidence of seismic anisotropy from estimates of shear wave splitting and their subsequent inversion for fracture parameters.

The data set consists of more than 40 three-component seismograms recorded by an array of sensors, which provides excellent ray by:   Fracture is a fundamental mechanism of material failure. Two basic types of brittle fractures are commonly observed in rock deformation experiments—extension (opening mode) fractures and shear Cited by: P-S data.

In this case, the shear wave splitting must be cor-rected, in order to maximize the value of the shear waves for mapping the reservoir. In this article, we show the application of shear wave splitting analysis for several cases – including compensation for overburden velocity anisotropy, fracture analysis, and improved Size: KB.

Superhot geothermal environments (above ca. °C) represent a new geothermal energy frontier. However, the networks of permeable fractures capable of Cited by: 2. Fracture Detection and Characterization completely attenuated. This is the clearest evidence that Stoneley waves propagate across fractures more efficiently than P or pseudo-Rayleighwaves.

Theoretical Studies There are three different studies of wave attenuation across fractures. The first is by Mathieu and Toksoz ().

Anisotropies in the rock arising from aligned fractures split incident shear waves into two modes: (1) one polarized roughly in the plane of predominant fracturing and (2) one polarized roughly perpendicular to this plane. Of course, both of these shear modes are polarized roughly perpendicular to the raypath.

Rock Engineering and Rock Mechanics: Structures in and on Rock Masses will be of interest to rock mechanics academics as well as to professionals who are involved in the various branches of rock engineering. Table of Contents. Keynote lectures.

Shear strength of rock, rock joints and rock masses – Problems and some solutions.the fracture features requires a method that thoroughly cleans the fracture surface.

Rust is a common contaminant of steel fracture surfaces. Superficial rust is sometimes removed with ultrasonic cleaning in detergent. More tightly adhered rust requires treatment with .