SU949211A1 - Filling mix - Google Patents

Description

() MORTGAGE MIXTURE

one

The invention relates to mining, in particular to compositions of backfill mixtures containing, in its basis, fine aggregate, and can be used in the underground mining of mineral deposits with the laying of a goaf.

The backfill mixture is known, containing the tailings of the processing plants, cement and water. In this backfill mixture, tailings of the processing plants are used with sludge 5 μm in size and not more than 36 of the total weight of the solid. For successful filling operations, the weight concentration of the slurry must be maintained at least 63-b5%, and the volume ratio of solid to liquid is about 1: 2 LI.

The disadvantage of this filling mixture is the large amount of water necessary to maintain the desired mobility of the mixture. Excess water leads to a decrease in the strength of the artificial array, the separation of the filling mixture, and also significantly increases the cost of replacement drainage.

Also known is the backfill mixture containing tailings, cement, granulated blast furnace slag and water taken at the following ratio, wt%:

Tailings of enrichment k2 - 80 Cement1,2 - 6,5

Granulated

blast furnace slag 2.5 -16.5

15 Water1.0, 0

To achieve the required mobility, the mixture is subjected to mechanical action, such as vibration. Once the 2Q solution fluidization is achieved by reducing the angle of the internal friction of the mixture and the manifestation of the thixotropic properties of the clay fractions, fill it up. 2. 39 The dependence of the reliability of the system on the accuracy of setting up the vibrators. The purpose of the invention is to increase the mobility of the filling mixture. The goal is achieved by the fact that the filling mixture containing and the tailings, cement, granulated blast furnace slag and water, additionally contain a blowing agent in the following ratio of components, weight D: -76, if the tailings 0.5 to 5.2 Cement 1.5 to 20.8 0.28 The blowing agent 16, 7 10 Water-Else Cement and granulated blast furnace slag crushed to a micron micron (70%) are added to the solution of the serial tailings of the enrichment. Preparations are prepared with different content of the starting components. mix well. The solutions obtained are saturated with air by the flotation machine aerator unit and the solution mobility is determined by the j-cone of the StroyCNIL. To compare the mobility values, formulations that do not contain a blowing agent are prepared. The finished solution was mixed with a flotation machine aerator unit without air intake. The processing time of all solutions is the same. The results of the experiments are presented in the table. The technical and economic advantage of the proposed composition of the mixture is that the use of the foaming agent during the subsequent aeration of the mixture makes it possible to increase the mobility by 15-26.

Claims (2)

Invention formula The filling mixture containing the tailings, cement, granulated blast furnace slag and water, characterized in that, in order to increase the mobility of the mixture, the composition further comprises a blowing agent in the following ratio of components, wt.%: Enrichment Tails 49 - 76> 4 Cement 0.5 ~ 5.2 R wounded blast furnace slag 1.5 - 20.8 Blowing agent 0.2810.3- 16.7-10 ⁵ Water Rest Sources information taken into account during the examination 1. Smoldyrev A. E .. Technology and mechanization of filling works. M., Nedra, 1974, p. 145-148. 2. USSR copyright certificate No. 662734, cl. E 21 G 15/00, 1978 (prototype). ВНИИПИ Order 5721/17 Circulation 470 Subscribed Branch of PPP Patent, Uzhhorod, st. Project, 4