SU1213222A1 - Method of filling-up excavated space with castable self-setting mixes - Google Patents

Description

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The invention relates to the mining industry and can be used in the underground mining of mineral deposits with the laying of the mined I o space.

The purpose of the invention is to reduce the cost of backfilling by reducing the labor intensity and cost of constructing an insulating fence, as well as ensuring the required quality of the backfill array.

FIG. Figure 1 shows a schematic diagram of a method for laying by cast hardening mixtures; in fig. 2 shows section A-A in FIG. one.

The method is carried out as follows.

The hardened mixture prepared on the filling chamber is fed through conduit 1 to thickener 2, for example, a cylindrical hydrocyclone, which separates the mixture into a thicker smaller part and the main mass. In a thick smaller part of the hardening mixture coming from the pipe 3, the curing accelerator is introduced through the pipe 4 with the help of the injector 5 and this quick-hardening mixture is placed on the bottom of the mine with a rotary tip 6, filling its entire cross section and forming an insulating fence 7. Main the more liquid mass of the hardening mixture through the pipe 8 is retracted into the worked-out space 9 for the erected fence.

The ratio between the volumes of the bulk compacted and more liquid mass of the mixture is regulated by the diameter of the branch pipes and can vary between 1: 3 and 1: 8 in order to ensure an appropriate rate of erection of the insulating O1 obstacle, the fluidity of the mixture and the quality of the hardening tab.

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On a surface filling complex with a capacity of 140, cast hardening mixtures based on slag, cement and water are prepared. All material is being skipped.

5 through a ball mill, after which the hardening mixture through a pipeline with a diameter of 200 mm is fed by gravity through a hydrostatic column at a speed of 1 m / s into the developed space - prepared

10 For a bookmark, the development is 150–200 m long with a cross section of 16 m and a dip angle of 3–5 °, ensuring the spreading of the mixture and more complete filling of the space.

At the end of pipeline 1, at the junction of the research institute of the slope and filled out working, a cylindrical hydro cyclone 2 with a diameter of 600 m is installed with a discharge pipe 8 with a diameter of 150 mm for the main mass of the mixture and pipe 3 (Fig. 2) for a thicker

20 mixtures. On the branch pipe 3 with a diameter of 75 mm, an injector 5 is installed with pipelines 4 and a rotary tip 6. In the hydraulic cylinder, the hardening mixture is divided into the bulk with flow

25 95 and more dense with a flow rate of 25, B followed by an injector through a hydrostatic column, a hardening accelerator — liquid glass — is introduced at a flow rate of 0.7 t / h. Thicker mixture with accelerator

JJJ hardening tip 6 is laid in the place of construction of the fence, forming a protective dam - isolated fence due to faster curing compared to the rest of the array. The volume of the developed space is 3000 m, which will be filled in 2-3 days, and the insulating barrier will be erected 4 hours after the start of the laying. During the day, fencing of the hardening mixture will have P1) at least 3 kgf / cm capacity, which is quite sufficient for retaining the main liquid mass of the mixture.

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VNIIPI Order 764/45 Circulation 436 Subscription Branch PPP Patent, Uzhgorod, ul. Project, 4

Claims (2)

, 1. METHOD FOR TURNING OUT THE SPACES OF EMBEDDED CAST WITH SOLID SOLID MIXTURES, including the construction of an insulating fence, feeding the mixture for the fence and self-filling the worked-out space with the simultaneous introduction of a hardening accelerator into the filling array, characterized in that, in order to reduce the cost of filling work and the cost of building an insulating fence, the hardening mixture is divided into thickened and liquid parts and the insulating fence is erected from the thickened part with continuous introducing into it the hardening accelerator, wherein the hardening liquid part of the mixture is filled simultaneously goaf. 2. The method of pop. 1, characterized in that, in order to ensure the required quality of the filling mass, the separation - SS of the hardening mixture is carried out in the hydrocyclone, while the density and the ratio of the volumes of condensed and liquid parts of the hardening mixture are controlled by changing the diameters of the outlet pipes of the hydrocyclone.