Masters Theses


"During recent years the use of power drawn scrapers, sometimes called "slushing", for the transfer of ore and waste rock has become standard practice in many mining operations. Scraper types have been developed to meet various operating conditions by trial and error methods and by practical research. The study of scraper efficiency has been confined in the past mainly to power consumption. A detailed study of the effect of rope speed and moisture content of the material being moved on scraping efficiency, under controlled conditions, has not been noted in a review of the literature. The author feels that such a study would be of practical value in its application to scraping practice. Therefore, the following thesis problem was set up: Purpose of Problem. For testing purposes the thesis problem was divided into two parts: rope speed studies and moisture studies. The principal purpose of the rope speed studies was to determine the effect on scraping efficiency of various rope speeds as applied to common scraper types moving both sized and mixed-size rock. The moisture studies were made to determine the effect of varying moisture content in mixed-size rock on scraper efficiency. It is hoped that the results of these tests will furnish information to improve present scraping practice"--Introduction, page 1.


Forrester, James Donald, 1906-1979


Mining Engineering

Degree Name

M.S. in Mining Engineering


Missouri School of Mines and Metallurgy

Publication Date



v, 49 pages

Note about bibliography

Includes bibliographical references.


© 1947 Ronald L. Carmichael, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Scrapers (Earthmoving machinery)

Thesis Number

T 769

Print OCLC #


Electronic OCLC #