AbstractsEarth & Environmental Science

Square set system of timbering as employed by the Shannon Copper Co.

by Ray Eugene Hoffman




Institution: Missouri University of Science and Technology
Department:
Year: 1908
Record ID: 1487300
Full text PDF: http://hdl.handle.net/10355/27030


Abstract

"The properties of The Shannon Copper Co., consisting of mine and smelter, are located in the Southeastern part of Arizona in what is known as the Clifton-Morenci District. The smelter is located at Clifton and the mine at Metcalf, eight miles distant on an iron capped mountain known as Serro Preito...The system employed by the Shannon company in mining these ore bodies is that of square set, the object being to excavate all the ore in a body and completely fill the excavated portion with waste material in order to hold the ground in place" – p. [1].