A three-step mining method suitable for deep and thick deposits

Abstract

The invention discloses a three-step stoping method suitable for a deep, heavy and large ore deposit. The three-step stoping method comprises the following steps: arranging panels along the directionof an ore body, temporarily reserving barrier pillars among the panels, and dividing the inner parts of the panels into stope rooms and pillars along the direction vertical to the ore body; stoping: step one, stoping the stope rooms, and subsequently, carrying out cement filling by whole tailings; step two, stoping the pillars, and subsequently, carrying out weak cemented filling by the whole tailings; step three, stoping panel barrier pillars, and subsequently, filling by the whole tailings. The step one is used for stoping under a two-side primary ore and rock supporting condition, the steptwo is used for stoping under a two-side cement filling mass condition, and the step three is used for stoping under a three-surface filling mass condition. The three-step stoping method disclosed bythe invention has the following advantages that principles of stress slow release and dynamic balance are fully utilized, the safety conditions of stoping of panel stopes are improved, and regional ground pressure control is facilitated; simultaneous stoping of multiple panels can be carried out, and the production capacity is large; the panel stoping modes are flexible, and the production stabilization can be favorably maintained.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a three-step mining method suitable for deep thick and large deposits. Background technique [0002] With the depletion of shallow mineral resources, deep mining has become an inevitable trend. Deep mining is faced with the special environment of high temperature, high ground pressure and high well depth. The mining technology, mining safety and recovery efficiency are all facing severe challenges. The traditional methods are difficult to adapt to the special deep mining environment. A mining method adapted to the deep special environment. Patent 201310674053.7 discloses a mining filling method, which uses filling slurry containing cement to fill the goaf of the second step stope and the filling area adjacent to the third step stope of the ore body, and uses The cement filling slurry is used to fill other areas of the goaf in the second step stope, so tha...

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Problems solved by technology

But above-mentioned patent is applicable to the mining of multi-layer gently inclined thin-medium-thick deposit, and those skilled in the art all know, and the mining of different ore bodies, mining accurate cutting process differs greatly, so above-mentioned patent can't be adapted to the mining of deep thick large deposit

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