Masters Theses

Abstract

"Since scrapers were first employed in underground mining work, numerous changes in scraper design have transpired until now there are several common types of scrapers in use in mines over the world. The proved models of scrapers have been developed over a period of more than fifty years. Although specific scrapers have been tested to determine the amount of power consumed, no literature could be found concerning the relative power consumption of the different types of scrapers when operated under identical conditions. Purpose of Problem - The purpose of this study is to determine the relative efficiency of different types of mine scrapers with regard to power consumption. Because rope speed and scraper weights are important factors affecting power consumption, these two factors were considered in conjunction with the different kinds of scrapers in this study; moisture tests were also conducted. Rock of mixed size grades was used in all tests. Problem Procedure - Four types of scrapers were tested. These were: The straight bail hoe scraper; the slope bail hoe scraper; the box scraper; and the crescent scraper"--Introduction, page 1.

Advisor(s)

Forrester, James Donald, 1906-1979

Department(s)

Mining and Nuclear Engineering

Degree Name

M.S. in Mining Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1949

Pagination

vi, 62 pages

Note about bibliography

Includes bibliographical references (pages 57-58).

Rights

© 1949 Stanely Francis Johnsen, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Electric power consumption -- Measurement
Scrapers (Earthmoving machinery)

Thesis Number

T 856

Print OCLC #

5977954

Electronic OCLC #

703625974

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