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 metallic ore deposits and particularly relates to a method for mining hanging wall ore by subareas under an open-air transportation system. Firstly, mining areas are divided according to the direction of ore bodies of the hanging wall ore, a haul road of the open-air transportation system is taken as a division standard, a hanging wall ore area, close to an open-air upper slope, on one side of the haul road serves as a first subarea, a hanging wall ore area located below the haul road serves as a second subarea, a hanging wall ore area, extending to an open-air lower slope, on the other side of the haul road is divided into N mining areas, N is larger than or equal to 1, open-air slopes are reinforced before mining, finally, mining is performed in each subarea from the first subarea according to the area division, and slicing is performed from bottom to top with a drift cut and fill stoping method in the ore body vertical direction in each subarea. With the adoption of the method, the hanging wall ore under the open-air haul road can be recovered safely and efficiently, and the slopes are protected permanently.

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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