Transport method of building longitudinal composite bridge in middle of strip mine stope

Abstract

The invention discloses a transport method of a lower stripping material of a strip mine, and particularly relates to a transport method of building a longitudinal composite bridge in the middle of a strip mine stope. Bridging manners of the longitudinal composite bridge include linear bridge stacking and fan-shaped bridge stacking. In a strip mining process, an operating line is long and a material stripping haul distance is large, so that building of a middle bridge perpendicular to the operating line in the gravity center of a stripping material in the stope can reduce a perpendicular haul distance of material handling on a bridge body. Building of sub-bridges based on the single bridge can increase service stripping steps of the bridge body. The transport method of building the longitudinal composite bridge in the middle of the strip mine stope is applicable to internal dumping strip mines adopting single-bucket excavator and truck mining technologies in a horizontal or subhorizontal strip coal mine, can reduce an automobile haul distance of the lower stripping material, can lower the transport cost, can increase an economic benefit, and has wide practicability.

Description

technical field [0001] The invention relates to a transportation method for building a longitudinal composite bridge in the middle of an open-pit mine stope, and is especially suitable for transporting the lower part of stripped objects during internal discharge in large-scale near-horizontal open-pit mines, so as to reduce the transportation distance and save transportation costs. Background technique [0002] As an important branch of the mining industry, open-pit mining undertakes increasingly important coal mining tasks. Its essence is to strip the overlying strata of the ore body and obtain useful minerals. Large-scale open-pit mines with near-horizontal inner row, due to the high mining intensity and long working line, the traditional ring-side inner row transportation not only makes it difficult to recover the residual coal at the end side, but also has a long distance to transport materials in the middle of the stripped step, and the transportation cost accounts for a...

AI Technical Summary

Problems solved by technology

Large-scale open-pit mines with near-horizontal inner row, due to the high mining intensity and long working line, the traditional ring-side inner row transportation not only makes it difficult to recover the residual coal at the end side, but also has a long distance to transport materials in the middle of the stripped step, and the transportation cost accounts for a relatively large proportion of the production cost. high

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