Refinement of the methodology for determining the boundaries of open pit operations for specific design purposes
Abstract
The increase in coal production by open-pit mining envisaged by the Five-Year Plan (122 million tonnes in 1960 against 66 million tonnes in 1955) by rates far exceeds the general growth of coal production in the Soviet Union, and especially from underground work: open-pit coal production increases by 88%, total production by 52%, underground production by about 40%. Such increased rate of development of open-pit works is connected with their well-known advantages, consisting, besides increase of labor productivity and reduction of production costs, in considerable improvement of labor conditions, increase of safety of works and sharp reduction of losses in the subsoil, especially at development of powerful steeply falling seams and veins. Injuries at coal pits are about five times less than in underground mines (reduction of severe and fatal cases is even greater).
References
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