Medium-depth hole multi-stope and section-by-section common chute mining method for hanging side ore body mining

Abstract

The invention discloses a medium-deep hole multi-stope and subsection common orepass mining method for mining a hanging ore body. The method comprises the following steps that stage division and subsection division are carried out on the hanging ore body according to the height of an open-pit bench, and transverse and longitudinal spacing pillars and side slope safety pillars are reserved; transport roadways and sectional roadways are utilized to tunnel a connecting roadway to reach the ore body, and a mining structure and a sectional rock drilling roadway are constructed; during stoping of anore room, a plurality of stopes simultaneously carry out medium-deep hole blasting operation, a cutting groove is used as a free surface for lateral ore caving, ore in each stage is conveyed to the centralized stage transport roadways through an orepass, and then conveyed to the ground surface; and after the open-air production is finished, the spacing pillars and top pillars are recovered in time. By adopting the method, the mining and cutting cost and the difficulty of staff organization and management can be reduced, the ore drawing efficiency is improved, and the influence of transportation operation on the slope stability is reduced.

Description

technical field [0001] The invention relates to a mining method for underground mining of metal mines, in particular to a mining method for medium-depth holes, multi-stopes and section-by-section co-passing shafts for mining hanging side ore bodies. Background technique [0002] At present, the mining methods of hanging side ore bodies are mainly divided into open-pit mining and underground mining. The development status of some mines requires underground mining to recover hanging side ore bodies. When using underground mining to recover the ore body with hanging sides, it will inevitably cause continuous movement and deformation of the open-pit slope, overlying rock strata and the ground surface. This deformation will have an impact on the surrounding geography and environment; the mining of hanging side ore bodies The design should take into account the time and space coordination with open-pit mining, and at the same time ensure the smooth connection with the main project...

AI Technical Summary

Problems solved by technology

When using underground mining to recover the ore body with hanging sides, it will inevitably cause continuous movement and deformation of the open-pit slope, overlying rock strata and the ground surface. This deformation will have an impact on the surrounding geography and environment; the mining of hanging side ore bodies The design should take into account the time and space coordination with open-pit mining, and at the same time ensure the smooth connection with the main project of underground mining, rationally control the output of the ore body with hanging sides so that the output of the mine can be kept in a stable transition; the development of the ore body with hanging sides should be designed separately The cost of the system is high and the construction time is prolonged, so it should be considered how to utilize the existing open pit mine production system and equipment

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