An open-stop and then-fill mining method suitable for gently inclined medium-thick ore bodies

Abstract

The invention discloses an open-stop and then-fill mining method suitable for a gently inclined medium-thick ore body, which specifically includes dividing the ore body into a mining middle section along the vertical direction, leaving a slanted top column between the two middle sections, and in each middle section, Divide the mining panel area along the direction of the ore body, leave a panel interval column between adjacent mining panels, divide the mine room and ore pillar in the mining panel area, and conduct mining engineering layout, cutting, mining and filling; the whole The panel is divided into two steps of mining, one step is back to the mining room, after the mining room is finished, tailings cement is used for filling, and the second step is back to the mining pillar, so that the cycle is completed until the stope mining is completed; the invention is very suitable for the mining of gently inclined medium-thick ore bodies , the use of V-shaped cutting trenches, short chutes for ore dropping and efficient ore extraction by scrapers overcomes the problem of difficult ore extraction from gently inclined ore bodies; at the same time, this method has short ore extraction time, high mining safety, and small dilution loss; improves It improves the efficiency of mining, shortens the mining time of the mine, and improves the production capacity of the mine.

Description

technical field [0001] The invention belongs to the technical field of mine mining, and in particular relates to an open-stop and subsequent-fill mining method suitable for gently inclined medium-thick ore bodies. Background technique [0002] Gently inclined medium-thick ore bodies, especially those with an ore body dip angle of 15°-25° and an ore body thickness of 5-15m, are extremely difficult to mine, and are known as the "cancer" in the world's mining field. For gently inclined ore bodies, because the inclination angle of the ore body is smaller than the natural repose angle of the ore, the caving ore cannot be discharged by its own weight in the stope. To realize the ore discharge, it is necessary to install electric rakes and other ore-drawing equipment in the stope; on the other hand , The stope of this type of ore body generally has a high empty ceiling, and it is difficult for workers to ensure their safety when working in an open field. The operating environment i...

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Problems solved by technology

[0004] The room-and-pillar method is used to mine gently inclined medium-thick ore bodies. The main problem is to solve the problem of ore transportation in the stope and the stability of the roof of the high and large open field. The room-and-pillar method is used in China to mine medium-thick and gently inclined ore bodies, and shallow hole rooms are generally used. Pillar method, medium-deep hole room-and-pillar method, downward layered recovery room-and-pillar method and other recovery schemes, but these methods have disadvantages such as harsh working conditions, low work efficiency, and low stope efficiency

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