A method for mining hanging side mines by partition under an open-pit transportation system

Abstract

The invention belongs to the technical field of underground mining of metal deposits, and specifically relates to a method for zoning mining of hanging gang ores under an open-pit transportation system. This invention first divides the mining area according to the direction of the ore body of the Guabang mine, using the transport road of the open-pit transportation system as the dividing standard, and the Guabang mine area on one side of the transport road close to the open-air upper slope as the first partition, and the area below the transport road The Guabang mine area is used as the second division. The Guabang mine area extending to the open-pit lower slope on the other side of the transportation road is divided into N mining areas, N≥1. The open-pit slope is reinforced before mining, and finally divided according to the area. Starting from the first zone, each zone is mined sequentially. In each zone, layered mining is carried out from bottom to top according to the vertical direction of the ore body, using the approach filling mining method. The invention can safely and efficiently recycle the hanging mine under the open-pit transportation road, and form permanent protection for the slope.

Description

technical field [0001] The invention belongs to the technical field of underground mining of metal ore deposits, and in particular relates to a method for mining hanging side ore in sections under an open-pit transportation system. Background technique [0002] Open-pit mining determines the final boundary according to the occurrence characteristics of the ore body and the economically reasonable stripping ratio. However, due to the irregular occurrence of ore veins, it is difficult to enclose all ore bodies within the open-pit mining boundary for mining. According to the relevant statistical data, the hanging side ore resources left under the open-pit slope account for about 5-16% of the total open-pit mining reserves. If the hanging side ore is not recycled, it will inevitably cause a serious waste of resources. However, due to the influence of the open-pit mining cycle disturbance, the open-pit slope is in a complex state of stress balance, and the recovery of the hangin...

AI Technical Summary

Problems solved by technology

Although the existing methods for recovering sidewall mines also reduce disturbance to the slope by retaining ore pillars or filling goafs during the mining process, however, for the recovery of sidewall mines under open-pit high and steep slopes and transport roads, In particular, under the condition of ensuring the long-term safety of open-pit transportation roads and the permanent stability of high and steep slopes, the research on the safe and efficient recovery of hanging side mines and the permanent reinforcement of slopes has not yet been reported.

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