Comparative coal transportation costs: an economic and engineering analysis of truck, belt, rail, barge and coal slurry and pneumatic pipelines. Volume 5. Conveyor belts. Final report

Abstract

A generalized specification and costing model for high tonnage coal carrying conveyor belts of 3.5 to 100 miles is presented. These belt systems, in modular units or flights, of up to 9 miles in length can be considered in terms of gathering systems. This study has concentrated on setting up an heuristic programming model for conveyor belt facility optimization and cost minimization. The analysis starts with the principle factors involved in the design of the system and their optimization for various cases. This is followed with a factor by factor cost analysis based on industry data and the preceding optimization. Finally, it has been assumed that the belt movement is over level terrain; if the terrain is hilly, both construction and operating costs increase. Operating costs rise due to increased belt tension. The program can be used, as needed, to provide the operating costs for any feasible terrain. A conveyor system is versatile and easy to operate. It is generally reliable and, once installed, has low maintenance and operating costs. As tonnages increase, fixed and operating costs become even more favorable. Nylon had been considered suitable only for the cross and filler threads of the belt carcass. Technical advancement inmore » heat setting and fabric weave created a major change by allowing full tension strength. Nylon resists moisture, acid and mildew. It also has excellent resistance to impact and can be produced with controlled elongation and elastic properties that work to advantage in reduced-ply belt construction. Another technical breakthrough produced a significant increase in chemical bond adhesion. The improved interface between an underground hauling system and a surface hauling system has been an important cost reducing factor in coal mining.« less