An In-Situ Solution Mining Method for Pillar Orebody in Underground Mine

Abstract

The invention discloses an in-situ leaching mining method for point-and-pillar ore bodies in underground mines, which is suitable for copper, gold, uranium, manganese and other minerals such as copper, gold, uranium, manganese and other minerals that have undeveloped groundwater or simple hydrological conditions and can be mined by leaching. The recovery of pips. Firstly, artificial false roadway is built in the goaf, the anti-seepage layer is constructed on the surface of the point column, and the goaf is cemented and filled to the roof, and then the liquid accumulation roadway, liquid accumulation borehole and liquid collection pool are formed at the bottom of the point column. And do anti-seepage treatment, construct ventilation holes, leaching agent addition holes and install leaching agent addition pipes on the upper part of the point column, add leaching agent from the leaching agent addition pipe to the point column, and leachate passes through the effusion drill at the lower part Holes and effluent tunnels flow into the liquid collection pool, and the leachate in the liquid collection pool enters the next production process by gravity or pumping. The invention has the advantages of safe operation, good ground pressure control effect, low cost and the like.

Description

technical field [0001] The invention belongs to the field of underground mining, and in particular relates to an in-situ leaching mining method for point-and-pillar ore bodies in underground mines, which is especially suitable for copper, gold, uranium, and manganese that have undeveloped groundwater or simple hydrological conditions and can be mined by leaching. Mining of tall point columns in underground metal mines such as minerals. Background technique [0002] At present, the commonly used mining methods for gently inclined ore bodies in domestic mines mainly include comprehensive method, room-and-pillar mining method, and point-and-pillar upward horizontal seal filling mining method. A certain proportion of point-pillar ore bodies are used as stope roof support, and these point-pillar ore bodies are generally treated as permanent losses, so during the mining process, the mining loss rate index is relatively high. [0003] In order to improve the utilization rate of or...

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Problems solved by technology

[0002] At present, the commonly used mining methods for gently inclined ore bodies in domestic mines mainly include comprehensive method, room-and-pillar mining method, and point-and-pillar upward horizontal seal filling mining method. A certain proportion of point-pillar ore bodies are used as stope roof support, and these point-pillar ore bodies are generally treated as permanent losses, so during the mining process, the mining loss rate index is relatively high

[0003] In order to improve the utilization rate of ore resources, many mining workers have conducted some research on the recovery of these point pillars. At present, the more commonly used mining methods are: drainage method, pillar cutting method, artificial pillar replacement method, full filling and subsequent mining methods. However, in the actual application process, due to factors such as personnel and equipment operation safety, roof ground pressure management, blasting free surface control, filling body mixing, etc., the implementation effect is poor and the recovery rate index is low

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