Open-stope subsequent filling mining method suitable for gently inclined medium-thick ore bodies

Abstract

The invention discloses an open-stope subsequent filling mining method suitable for a gently inclined medium-thick ore body. The open-stope subsequent filling mining method particularly includes the steps that the ore body is divided into mining middle sections in the vertical direction, an inclined top column is reserved between every two middle sections, mining panels are divided in the trend direction of the ore body in each middle section, panel barriers are reserved between the adjacent mining panels, stope rooms and ore columns are divided in the mining panels, and preparation project arranging, cutting, stoping and filling are carried out; the whole panels are stoped by two steps that step 1, the stope rooms are stoped, after stoping of the stope rooms is finished, and tailings areadopted for cemented filling; and step 2, the ore columns are stoped, and the steps are repeated until stoping of a stope is finished. The open-stope subsequent filling mining method is very suitablefor mining of the gently inclined medium-thick ore body, ore drawing is efficient carried out by adopting a V-shaped trench, short draw shaft ore-breaking and a scraper, and the problem of difficult ore drawing of gently inclined d ore bodies is solved; meanwhile, the method is short in ore drawing time, high in mining safety, and low in dilution loss; and the ore drawing efficiency is improved, the stoping time of the stope rooms is shortened, and the production capacity of the stope rooms is improved.

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 dip angles of 15°-25° and ore body thicknesses 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 is harsh, whi...

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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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