Technology for filling of gob under well with adhesive filling materials

Abstract

The invention provides a technology for filling of a gob under a well with adhesive filling materials. First, tailing waste residues generated by a concentration plant are discharged from an ore-discharging valve at the bottom of a waste residue bin, fine materials are obtained through repeated crushing and sieving and transferred into a gravel finished product bin, then according to a proportion, the fine materials, ore slurry, adhesive materials and water are jointly fed into a filling slurry stirring system to be stirred uniformly to obtain the filling materials, and finally the filling materials are pumped into the gob under the well. The procedures where waste gravel is crushed during preparation of the filling slurry are simplified, and the procedure of ore grinding is omitted; the ore slurry generated by ore concentration of the concentration plant is adopted for improving the grade of the filling slurry, the stirring technology for the filling slurry is adjusted, continuity is achieved during preparation of the filling slurry, and filling cost is lowered.

Description

technical field [0001] The invention relates to the technical field of mine filling slurry, in particular to a process for filling underground mined-out areas with cemented filling slurry. Background technique [0002] When the tailings produced by the gravity separation process are used as mine filling materials, it is necessary to carry out crushing and other treatment processes on the mineral processing waste slag produced in the dressing plant, and then process them below a certain particle size, and then mix them with cementing materials to prepare filling slurry and fill them to the goaf Area. However, the content of fine particles in the crushed material of waste residue is very low, and the fluidity of the slurry made from the crushed material is poor, and it is often necessary to add a large amount of cement or use a booster pump to transport it. In order to reduce cement consumption and improve the fluidity of filling slurry in China, multi-stage technological pro...

AI Technical Summary

Problems solved by technology

[0004] (1) The gravel crushing system includes a vibrating feeder, a jaw crusher, a toothed roller crusher, and a drum screen. The process flow is complex, and the two-stage crushing and one-stage screening system is used, resulting in excessive investment and high operating costs.

[0005] (2) The crushed 15mm qualified crushed stone is ground into powder by Raymond mill. In order to increase the fine particles in the filling slurry and improve the gradation of the filling, the grinding process is added, resulting in a The process is complicated and the operating cost is high

[0006] (3) The filling slurry contains large-grained aggregates of 15 mm, and the mixing tank is used for stirring, which is likely to be insufficiently stirred. If sufficient mixing is required, the stirring time needs to be increased, resulting in discontinuous preparation of the filling slurry

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