Multilayer gentle dip thin-medium ore deposit filling and mining method

Abstract

The invention relates to a multilayer gentle dip thin-medium ore deposit filling and mining method. According to the technical scheme, the method comprises the following steps: dividing ore blocks, arranging mining and cutting projects, transporting, mining and filling. The step of dividing an ore deposit comprises the following sub-steps: dividing an ore body in the stage into a disc area, tunneling to uphill (2) at the bottom of an ore layer (1) along the inclined direction of the ore body, dividing the ore body on two sides into ore chambers (15) and ore columns (14) along the uphill (2), and reserving uphill ore columns (18) by taking the uphill (2) as the center. Three-step recovery is adopted in the disc area and comprises a first step of recovering the ore chambers (15), a second step of recovering the ore columns (14) and a third step of recovering the uphill ore columns (18); after the ore chambers (15) or the ore columns (14) are totally recovered, a goaf area (11) is downwards filled through the uphill (2) on the upper layer and via filling ventilation holes (10) communicated with a stope; finally, the uphill ore columns (18) are recovered within three steps from bottom to top along the uphill (2) by taking the disc area as a unit, and the uphill ore columns (18) in the next disc area are recovered after filling. The method has the characteristics of high mining intensity, high ore recovery rate, low ore dilution ratio and low mining cost.

Description

technical field [0001] The invention belongs to the technical field of filling and mining of thin-medium-thick ore deposits. In particular, it relates to a filling mining method for multi-layer gently inclined thin-medium-thick ore deposits. Background technique [0002] The mining of a large number of gently inclined thin-medium thick deposits mainly adopts the room-and-pillar method and the caving method. The outstanding disadvantage of the room-and-pillar method is that it is difficult to recover the ore pillars in time, the ore loss is relatively large, and the roof collapse induced by a large area of ​​empty space will pose a major safety hazard to subsequent production. The outstanding disadvantage of the caving method is that it will cause surface subsidence, which is not conducive to the protection of the surface environment. Therefore, people adopt the traditional filling mining method, that is, to mine the ore first, build a filling retaining wall at the edge of ...

AI Technical Summary

Problems solved by technology

However, the traditional filling method has low mining intensity and complex production connection management, resulting in a corresponding increase in mining costs

[0003] For multi-layer gently inclined thin-medium-thick ore deposits, it is generally mined layer by layer along the ore layer, and the applicable mining design is not carried out according to the characteristics of the multi-layer ore deposit. A large number of mining and cutting roadways are excavated for each layer, and each layer operates independently , the connection between the layers is less, resulting in a large mining-cutting ratio, a long construction period of the mining-cutting project, and high mining costs

Some mines adopt the mining method of emptying and then filling. The filling operation and the mining process are interlaced and affect each other. The continuity of mining is poor, resulting in low mining intensity and low production capacity.

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