RU2522120C1 - Disposal of potassium concentration wastes - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: proposed method comprises opening, preparing and working of the section of chambers, preparing of filling mix of potassium dressing wastes and filling of chambers. Working section is opened in drifts from overlying bed. After processing of said section by cleanup chambers, the latter are filled with filling mix with addition of calcium chloride. Filling mix is fed over drifts from overlying bed by gravity. After filling of said chambers, impermeable dams are erected at drift start. Subject to mining and geological conditions, said filling mix can be fed to every chamber or set of chambers via wells drilled from working of overlying bed. Then, wells are plugged.

EFFECT: decreased volume of mining job, larger volumes of disposal.

3 cl, 2 dwg

Description

The invention relates to the mining industry and can be used in the disposal of waste enrichment of potash industries.

A known method of underground storage of saline sludge waste, including the passage of chambers with the pillars between them, the passage of ventilation, transport and drainage drifts, the hydraulic delivery of sludge from the concentration plants, the selection of brines and their supply to the concentration plants, in which the chambers pass in the working horizons of stable waterproof rocks (A.S. 1058836 USSR, IPC B65G 5/00, E21F 15/00. Method of underground storage of saline waste; declared 04.03.82; publ. 07.12.83, Bull. No. 45).

The disadvantage of this method is that for the placement of sludge requires passing special slurry chambers in rock salt.

Also known is a method of laying sludge, which allows you to leave solid and liquid parts of the sludge in the solid state, including the preparation of a filling mixture from sludge formed during the production of potassium chloride and calcium chloride (Pat. 2459086 RF, IPC E21F 15/00. Bookmarking method sludge; declared. 21.03.2011; published. 08.20.2012).

The disadvantage of this method is that for its implementation it is required to install impervious jumpers in each chamber to hold the filling mixture.

Closest to the proposed technical solution is a method of laying salt waste, including opening, preparing and mining a section of chambers, their subsequent laying through wells from an overlying layer (Methodical guide for mining at the mines of the Verkhnekamsk potash deposit // UV VNIIG. - Nedra. - Moscow , 1992. - S.153-155).

The disadvantage of this method is that it requires significant costs for the removal of clarified brine from the chambers.

The technical result of the invention is to reduce the volume of waste disposal of potash production in surface tailings due to their placement of waste treatment chambers, as well as to reduce the volume of mining.

The specified technical result is achieved by the fact that in the method for disposing of waste products from potash production, including opening, preparing and working out a section of chambers, preparing a filling mixture from waste from potash production and laying cameras, opening the worked-out section is performed by deviations from the overlying formation. Spent treatment chambers are filled with filling mixture with the addition of calcium chloride, which is fed along slopes from the overlying formation. The filling mixture on the slopes is fed by gravity. After filling the chambers, impervious bridges are erected at the beginning of the slopes. The filling mixture is fed into each chamber or group of chambers from the overlying formation through the wells, followed by their plugging.

The essence of the method is illustrated by drawings, where figure 1 shows the General layout of waste in the chambers, figure 2 is a section along aa.

The drawings indicate: 1 - development of the overlying formation; 2 - conveyor slope; 3 - ventilation slope; 4 - dredging drift; 5 - ventilation drift; 6 - treatment chambers; 7 - filling pipeline; 8 - impermeable bridge; 9 - bookmark array.

The method of waste disposal of potash production in waste chambers is as follows.

Initially, from the workings of the overlying formation 1, the conveyor 2 and ventilation 3 slopes to the underlying sylvinite layer pass along the boundaries of the site to be worked out (Fig. 1).

Then, from slopes 2, 3, on the underlying formation, there are excavation 4 and ventilation 5 drifts. At the prepared site, treatment is carried out by the chamber system, while the ore from the sinking of the treatment chambers 6 enters the beneficiation plant.

After working off the treatment chambers 6, they place waste from the enrichment of potash production hydraulically.

The filling mixture is prepared on the surface, and it is served hot to the laying chambers. This is due to the fact that calcium chloride is added to the backfill mixture from waste products from potash production, which hardens upon cooling. The filling mixture through the filling pipelines 7 laid along the workings of the overlying formation is transported to the waste disposal site.

The filling mixture to fill a group of chambers with a mixture of waste is fed from the conveyor belt 2 and / or ventilation 3 slope by gravity, then the filling mixture is fed to the excavation drift 4, spreads and fills the treatment chamber 6. After filling the chambers 6 sylvinite layer, i.e. after the pulp reaches the slopes, the feed of the filling mixture is stopped and the impermeable jumpers 8 are erected at the beginning of the slopes, thereby isolating the waste disposal site (Fig. 2).

After cooling the filling mixture, it presents a solid filling array 9, since the brine, entering into a chemical reaction with calcium chloride, forms a solid - calcium chloride crystalline hydrate.

Thus, the disposal of waste (salt waste and clay-salt sludge) is carried out in treatment chambers in a separate section of the sylvinite reservoir, which has 2-4 inclined exits to the overlying reservoir.

Depending on the geological and geological conditions, the filling mixture can be fed into each chamber or group of chambers of the sylvinite reservoir through the wells drilled from the workings of the overlying reservoir. After that, the wells should be plugged.

The advantage of the proposed method is that for waste disposal is not required:

- pass special chambers along rock salt, since waste is disposed of at the site of mining treatment chambers of the sylvinite layer;

- perform the isolation of each chamber to hold the filling mixture in it, since the pulp is produced by inclined workings from the overlying formation;

- pump out the brine, because the brine contained in the filling mixture enters into a chemical reaction with calcium chloride to form a solid - calcium chloride crystalline hydrate.

The completeness of filling the chambers with filling mixture will be more than 95%.

The proposed method allows you to place a significant amount of waste potash production in waste treatment chambers, thereby reducing the volume of their disposal in surface tailings.

Claims (3)

1. A method of disposing of waste from potash production enrichment, including opening, preparing and working out a section of chambers, preparing filling mixture from waste from potash production and laying down chambers, characterized in that the opening of the worked out section is performed by slopes from the overlying layer, the waste treatment chambers are filled with filling mixture with by adding calcium chloride, which is fed along slopes from the overlying formation, and after filling the chambers, impermeable bridges are erected at the beginning of the slopes. 2. The method according to claim 1, characterized in that the filling mixture is fed along the slopes by gravity. 3. The method according to claim 1, characterized in that the filling mixture is fed into each chamber or group of chambers from the overlying formation through the wells, followed by their plugging.

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