A collaborative mining method that can be mined under pressure

Abstract

The invention provides a collaborative mining method that can be mined under pressure. The rock between the ore body and the water body is used as a water barrier, and the ore body adopts the subsequent filling mining method. Rock or large-diameter deep-hole drilling, stage bottom structure mining; the layout of mining engineering is: the mine house on the mining level is arranged along the strike, and there is a through-vein roadway; the top of the mining level is the ore body, and the ore body The top is the drilling level and the blasting level, and below the ore outlet level there is a piercing lane, which is parallel to the piercing lane. The vein lanes and the vein-piercing transport lanes are distributed on the vein lanes; after the blasting level above the ore body is blasted, after the ore falls to the ore-exiting level below, the ore is discharged to the mine-slip shaft, and then falls. The ore is discharged into the through-vein transport lane below the stope.

Description

technical field [0001] The present invention relates to a collaborative mining method capable of mining under pressure. Background technique [0002] At present, the karst aquifer on the roof of the ore body has the characteristics of large thickness, well-developed karst caves, high mud and sand filling rate, well-developed water-conducting faults and abundant hydrostatic storage. It is very easy to produce sudden water inflow and underground debris flow during road development, mining accuracy engineering and subsequent mining, which poses a threat to underground infrastructure and production safety; and because iron ore bodies are stored in water-rich strata, the method of avoiding water is mainly used. Feasibility; however, the use of curtain grouting on the side of the underground ore body would require too much engineering work, and there is a certain risk of water inrush, so it is not suitable to be used. [0003] Therefore, at present, the traditional drying method ...

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Problems solved by technology

[0004] However, there are also the following problems: the water level in the strong karst area drops significantly below the middle section of the mine, and the water inflow in the mine pit will also increase significantly. In this way, not only a large number of drainage projects need to be invested, but also affected by the slow decline in the water level, the production will also lag behind. It will take several years to reach the mining conditions; in addition, the increase in drainage will also require a large amount of funds in the early stage for drainage projects, which will significantly affect the economic benefits of the mine

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