Abstract
In order to backfill the west open-pit mine in Fushun which is abandoned soon, the key technology of chute process has been studied. According to the movement rules of materials in the chute, using the method of theoretical calculation and laboratory simulation , U chute with inclination angle of 33°has been determined, mathematical model of material transportation in the chute has been established, the distance and height of materials reaching the bottom of the chute has been determined and the protective wall with hight of 2 m, distance of 24 m to the chute has been designed. Meanwhile, by numerical simulations, rules of dust transportation and diffusion in the chute has been studied , dusts finer than 100µm has been identified as the main pollutants, and the chute process of dust-protected has been put forward .
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