Cemented filling material for mine and preparation method thereof

Abstract

The invention provides a cemented filling material for a mine and a preparation method thereof. The cemented filling material is prepared from the following raw materials in parts by weight: 40-100 parts of whole tailings, 10 parts of plastic bone powder, 16.67-73.33 parts of water and a flocculant, wherein, the addition amount of the flocculant is 10 g / t, and the concentration of a flocculant aqueous solution is 0.1%. The preparation method comprises the following steps: weighing the plastic bone powder, whole tailings and water according to the weight parts, weighing the flocculant according to a unit consumption account of 10 g / t, and preparing the flocculant aqueous solution with a mass concentration of 0.1%; fully mixing the weighted plastic bone powder and whole tailings in a stirrer, and then adding the weighted water while stirring so as to obtain a mixed material, wherein, stirring is primary stirring; and adding the prepared flocculant aqueous solution into the mixed material, performing uniform stirring, so that the flocculant is in full contact with the mixed material, after secondary stirring is completed, the filling material is prepared. The prepared cemented filling material by the invention is stable in performance, simple in preparation process, short in curing period, and suitable for mining with filling of the vast majority of mines.

Description

technical field [0001] The invention relates to the field of mineral resources development, in particular to a cemented filling material used in mines and a preparation method thereof. Background technique [0002] With the continuous development of mineral resources, the mining depth continues to increase, and the underground mining environment is becoming more and more complex. During the mining process, sometimes large-scale subsidence and subsidence will occur due to the large mined-out area, which is not conducive to safe production. With the deepening of mining, a lot of waste will be produced accordingly, and the amount of tailings produced by mineral processing will also continue to increase. The stacking of tailings not only pollutes the environment, but also seriously affects the sustainable development of the mining industry. With the maturity of mining technology, tailings filling mining method is often used at home and abroad for mining. The tailings mining an...

AI Technical Summary

Problems solved by technology

So far, most mines at home and abroad have adopted the mechanical dehydration process of thickening and filtering two-stage dehydration to concentrate tailings. Although this dehydration process can meet the requirements of tailings dehydration, it is costly, complicated, and has limited processing capacity; Some mines use high-water quick-setting materials for full tailings filling. Although this material has low requirements for tailings, it is expensive and the strength of the cemented body is lost due to severe carbonization in the later stage. Therefore, this material has not been widely used.

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