Mine subsequent cemented and non-cemented filling mining method

Abstract

The invention discloses a mine subsequent cemented and non-cemented filling mining method, comprising the following steps: (1) preparing chambers; (2) preparing for chamber filling; (3) preparing for filling: making tailing, cement, super-micro powder and aggregate made from mining waste rock into a filling slurry with the concentration of larger than 70 %, carrying out cemented filling by applying pressure or flowing automatically to the prepared mining chambers, and carrying out non-cemented filling only by directly filling the mining chambers with high-concentration tailing having the concentration of larger than 65 % and mining waste rock having the particle size of less than 2 cm; (4) stoping and filling the chambers: stoping and filling the next adjacent chamber in every four chambers, wherein the cemented and non-cemented filling modes are carried out alternately between the adjacent chambers; and (5) managing after filling. The invention has significant economic social benefits, and is suitable for mining with the filling mining method, especially for the mid-low grade phosphate rock.

Description

technical field [0001] The present invention relates to fill mining methods, and more particularly, to a method of mining followed by cemented and non-cemented fill mining. Background technique [0002] The technology similar to the present invention is the Chinese patent ZL200710077624.3 "Phosphogypsum cementation followed by filling mining method and its pulping process", which discloses that the pulping process uses phosphogypsum, fly ash or dolomite and cement as fillers The material of the slurry, after adding water, is made into a filling slurry through a complete set of mixing equipment; the filling slurry enters the mining level through the filling borehole or the pump station, and then enters the upper layer of the filling stope through the inclined well of the filling pipeline. The level roadway is filled into the stope by the connection road of the upper layered mine room that fills the stope. The invention can ensure the mine's full and stable production, improv...

AI Technical Summary

Problems solved by technology

The invention can ensure the mine's full and stable production, improve the ore recovery rate, fully recycle the phosphate resources, and have remarkable economic benefits; it can also effectively protect the mine environment, solve geological disasters caused by open-field mining, and unsafe mine production. It poses a threat to surface industrial facilities, roads and houses, but its biggest shortcoming or shortcoming is that it directly uses phosphogypsum, an industrial waste residue that is extremely harmful to the environment, as the main filling material for underground filling, and its harm to the underground environmental water system bound to be huge

Secondly, the use of fully cemented filling will inevitably lead to an increase in filling costs, which is extremely unfavorable in terms of mining costs for the mining of ores in low- and medium-grade phosphate rock areas with poor ore quality

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