Doctoral Dissertations

Abstract

"Five electrical resistivity tomography (resistivity) case studies are presented. The first case study, entitled "Springfield Underground", includes ERT data acquired with the purpose of imaging the ceiling of an limestone aggregate mine following simultaneous localized roof failure. The interpretation of the ERT data indicates roof rock failure occurred at the intersection of two previously unmapped near-vertical solution-widened fractures.

At the "Chesterfield Dam" site, resistivity data were acquired to identify the zone of seepage through an earthfill dam. The seepage pathway beneath the dam is interpreted as through a solution-widened fracture, the top of which constituted a segment of the original stream channel. The "Gasconade River" case study includes resistivity data acquired beneath two bridges in order to map the areal extent of an underground waterfilled opening encountered in routine investigative borings. Two principle east-northeast trending fracture zones were identified on the ERT data and the areal extent of the waterfilled void was mapped based on the acquired resistivity data. The "Jefferson City" case study includes resistivity data acquired to map variable depth to the top of bedrock. It is concluded that the southeastern part of the study site overlies an upper erosional terrace, whereas the northwestern part overlies the erosional stream channel. A conceptual model of the formation the upper terrace is proposed. In the fifth case study, "Lane Springs", resistivity data were acquired immediately adjacent to Lane Spring with the purpose of mapping the aquifer and variable depth to top of rock.

The conducted research demonstrated the ERT method was an effective tool for imaging the subsurface in the karst terrain"--Abstract, page iii.

Advisor(s)

Anderson, Neil L. (Neil Lennart), 1954-

Committee Member(s)

Salam, Mohamed Abdel
Cawlfield, Jeffrey D.
Maerz, Norbert H.
Sneed Lesley

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geological Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2012

Pagination

xiii, 133 pages

Note about bibliography

Includes bibliographical references (pages 129-132).

Geographic Coverage

Missouri

Rights

© 2012 Evgeniy Vladislavovich Torgashov, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Tomography -- Scientific applicationsKarst -- MissouriElectrical impedance tomography -- Case studiesImaging systems in geology

Thesis Number

T 10150

Print OCLC #

852149158

Electronic OCLC #

909391151

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