Waste dump presser foot wall hanging concurrent construction method in open pit coal mine

Abstract

The invention provides a waste dump presser foot wall hanging concurrent construction method in an open pit coal mine. The construction method comprises the following steps: (1) performing stability evaluation on a stope bounded slope of the open pit coal mine, and executing a step (2) if the stability coefficient is greater than a safety storage coefficient K of the inner waste dump, otherwise executing a step (3); (2) performing wall hanging dumping, and sequentially determining the optimal flat plate width of each wall hanging dumping step from bottom to top; and (3) sequentially performing presser foot dumping from bottom to top, performing stability evaluation on a stope-inner waste dump composite slope II when the primary presser foot dumping step is completed, and returning to the step (2) when the stability coefficient Fsn of the composite slope II is greater than the safety storage coefficient K of the inner waste dump, otherwise performing the previous level of presser foot dumping step until the final disposal position designed by the open pit coal mine is reached, and forming an inner waste dump presser foot form; and (4) performing continuous dumping according to the waste dump flat plate width of the open pit coal mine.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a parallel construction method for presser feet and hanging sides of a dump site in an open-pit coal mine. Background technique [0002] The internal dump is the inevitable product of open-pit mining in near-horizontal and gently inclined coal seams. Some large-scale open-pit coal mines in my country, such as Heidaigou, Fushun East Open-pit, Yimin, Huolinhe, Antaibao, Shenhua Baori Xile, Shengli West No. 2, Yuanbaoshan, Anjialing, Harwusu and other open-pit coal mines Internal dumps are designed, and the number and scale of internal dumps are increasing year by year. The external discharge ratio of the internal dump and the stripped material discharged outside the stope has the advantages of short transportation distance, less farmland occupation, environmental protection, simplified production management, etc., and fully and quickly occupying the internal dum...

AI Technical Summary

Problems solved by technology

This traditional design method requires that after the stripping project is lowered to the bottom of the pit, soil should be discharged from the bottom up according to the normal flat plate parameters and safety requirements, and a large amount of internal drainage space is often lost in the early stage, and the construction of the internal dump site is seriously lagging behind. , seriously deteriorated the initial economic benefits of the open-pit mine

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