Masters Theses

Abstract

"Prediction of groundwater influx into mine openings is one of the more important pre-development problems encountered in mining. A satisfactory method of estimation would provide the information necessary for a mining company to dewater prior to shaft sinking, pre-grout the shaft area, or plan pumping schemes to handle the expected flow.

A standardized field method of estimating groundwater supply from pumping test data was developed by O. V. Theis and others. In the present research problem, the estimation procedure has been simplified by the use of nomograms. Certain modifications in the estimate must be made when a pumping well is replaced by a large diameter opening, such as a vertical mine shaft. Due to large surface area available for influx, a shaft diameter factor has been developed to account for the increased flow. During shaft sinking, influx is less than calculated by the Theis equations due to partial penetration of the water bearing strata; therefore, a correction factor for partial penetration is introduced. Finally, it is necessary to pump water from the shaft bottom at a rate equal to or greater than the rate of influx, in order that shaft sinking may proceed without interruption. An estimate is made of the amount of dewatering caused by pumping.

When pumping test data are analyzed and the results modified by correction factors, an estimate of influx is obtained which is close to that actually encountered during sinking"--Abstract, page vi.

Advisor(s)

Vaughn, George E., Jr., 1925-1997

Committee Member(s)

Christiansen, Carl R., 1921-1997
Maxwell, James C.
Proctor, Paul Dean, 1918-1999

Department(s)

Mining and Nuclear Engineering

Degree Name

M.S. in Mining Engineering

Sponsor(s)

United States. Bureau of Mines

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1961

Pagination

vi, 74 pages

Note about bibliography

Includes bibliographical references (pages 72-73).

Rights

© 1961 Morris T. Worley, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Groundwater flow -- Measurement -- Estimates
Shaft sinking
Groundwater -- Mathematical models

Thesis Number

T 1294

Print OCLC #

5932460

Electronic OCLC #

962732353

Comments

The United States Bureau of Mines, through the Rolla Office of Mining Research, provided financial assistance for background study.

Page 49 is scanned twice; second scan includes flap of numbers bound into book..

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