Method of dealing with goaf by ultra-deep hole blasting in open-pit mine

Abstract

The present invention relates to a method for treating a goaf by ultra-deep hole blasting in an open-pit mine, comprising the following steps: detecting the goaf: drilling a hole in the goaf, and combining a three-dimensional laser scanner or an underwater sonar scanner to detect the goaf Collect relevant information on the scope of the goaf, roof thickness and height of the goaf, and establish a three-dimensional address model; perforate the goaf, and use geological drilling rigs on the top and surrounding parts of the goaf according to the shape of the goaf obtained from the detection data of the goaf Drill the main blasting hole, cutting hole and auxiliary hole, and install a slag bucket at the hole to ensure the porosity; charging, backfilling and blasting. Adopting the method for treating the goaf by ultra-deep hole blasting in the open-pit mine of the present invention, on the one hand, the goaf can be collapsed and processed at one time, avoiding the potential safety hazard of secondary compensation when the gob is mined due to layered treatment, and on the other hand, it can solve the problem of The safety and technical problems that plague the mining of open-pit mines under complex empty conditions provide a guarantee for improving mine production capacity.

Description

technical field [0001] The invention belongs to the field of blasting treatment of goafs in open-pit mines, and in particular relates to a method for treating goafs of open-pit mines by ultra-deep hole blasting. Background technique [0002] Due to historical reasons, there are a large number of unknown underground goafs in open pits. For suspected goaf areas, use down-the-hole drills, use the cross grid method to arrange drilling holes at a certain interval, and combine with 3D laser scanners or underwater sonar scanners to analyze the range of goafs, roof thickness, and void areas. Height and other information are collected, and the goaf is processed by forced blasting to induce caving. At present, the thickness of some slabs varies greatly (the maximum thickness of the roof is 40 meters), the distribution is extremely irregular, and the voids that do not have the conditions for stratified treatment can only be subdivided and collapsed at one time. Restricted by technica...

AI Technical Summary

Problems solved by technology

With the decline of the mining level in the mining area, the mining boundary is constantly shrinking, which not only limits the production capacity of the open-pit mine, but also increases the difficulty of detecting and processing the subsequent goaf

At present, there is no relevant report on the technology of ultra-deep hole blasting in the open pit to deal with the goaf

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