Date of Award
Bachelor of Science in Mining Engineering
Professor Koehler S. Stout
By use of several digging principles, such devices as scrapers, clamshells, power shovel loaders, etc., have been perfected. The net results have been an almost complete elimination of hand mucking, an increase of loading speed, and a reduction of sinking costs. Moreover, the elimination of hand mucking has had a favorable psychological effect on the crew, as well as saving physical effort for the other phases of the shaft-sinking cycle.
Delzo, Jorge R., "Shaft Mucking Investigation PART 2" (1957). Bachelors Theses and Reports, 1928 - 1970. 470.