Method of layer-by-layer laying of clay-salt slimes and salt wastes in one chamber

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in underground mining of potash mines with goaf stowing. Proposed method comprises forming laying cavity in the chamber, separate transfer and storage of salt wastes and clay-salt slimes, discharged of settled brine. Note here that chamber laying cavity is filled, first, with clay-slat slimes and, after settling of said slimes and brine clarification, salt wastes pulp is fed into said chamber to fill it completely. Note also that solid fraction of clay-salt slimes fed into the chamber is determined by the following formula : where Msl is weight of solid clay-salt slime fraction in the chamber, t; Msc is weight of salt waste in the chamber without clay-salt slime, t; S+Sl is sum of salt wastes and clay-salt slimes withdrawn from enrichment process. Invention is detailed in dependent claims.

EFFECT: increased volume of laid clay-salt slime in goaf stowing.

4 cl, 1 ex, 3 dwg

 

The invention relates to the mining industry and can be used in underground development of potash deposits with the mined-out space.

There is a method of laying-out space in the development of potash deposits, including separate transportation Solodov and clay-salt slurries, placement at the beginning and end of some cameras Solodov, filling the middle part of these cameras clay-salt slurries and simultaneous filling of the other cameras lileokalani, with clay-salt slurry before it enters the chamber separated by the hydrocyclones and the sand portion is directed into a chamber filled with lileokalani and drain hydrocyclones - in camera, prepared for sludge (A.S. USSR №1244354, MKI 21F 15/00, publ. 15.07.1986, bull. No. 26).

The disadvantage of this method is that due to the low efficiency of sludge thickening using hydrocyclones increases the number of cameras prepared to accommodate draining of hydrocyclones, which reduces the efficiency of bookmarks in General.

Also there is a method of laying-out space in the chamber potash strata, which consists in the construction of the filter jumpers at the bottom of the camera, the preparation of backfill material from Solodov and clay-salt sludge, hydraulic zakladochnoj the material, the filling of the exhaust chambers and the outlet chamber through the pipes settled brine (Andreiev A.N. Development of potash deposits. - M.: Nedra, 1966, - p.á192-199).

The drawback of this method is that the presence of clay particles leads to a decrease of the filtering capacity of the bridge, and consequently to the decrease of filling operations.

Closest to the proposed invention is a method of laying-out space in the chamber system development sloping potash strata, which consists in the construction of bridges at the bottom of the camera, the preparation of backfill material from Solodov and clay-salt slurries, transportation of backfill material, the filling of the chambers and the discharge of brines, with the start and end of the chamber initially lay lileokalani, and then the remaining middle part of the chamber of clay-salt slurries (A.S. No. 810992 the USSR, MKI 21F 15/00, publ. 07.03.1981, bull. No. 9).

The disadvantages of this method are that it requires large expenditures on the construction of bridges, especially in the lower part of the chamber and to maintain the effectiveness bookmarks clay-salt slurries can be placed, according to the calculations, only every fourth or fifth camera, this leads to a small volume of sludge.

These shortcomings astronauts is in the proposed method, according to which each cell is served first clay-salt slurries, and after - Soledad.

The technical result of the invention is to increase the volume of the placed clay-salt slurry in the mined-out area through layer-by-layer filling each chamber of clay-salt slurries and lileokalani.

The technical result is achieved by the method of layer-by-layer bookmarks clay-salt slurries and Solodov in one camera, including education in the chamber filling capacity, separate transportation Solodov and clay-salt sludge and drainage settled brine, original capacity fill clay-salt slurries, and after settling sludge and clarification of brine in the chamber serves the pulp from colodado to fill her lileokalani, while the mass of the solid part of the slurry of the pulp supplied to the camera is determined by the formula:

where MSHK- weight of the solid part of the clay-salt slurry placed in the chamber, t;

MSC- weight of colodado that can be placed in the chamber without regard to clay-salt slurries, t;

C+W is the sum of the parts of Solodov and clay-salt sludge coming from the enrichment process, provided that:ø the relationship of parts of Solodov and clay-salt slurries, the emergent and the enrichment process.

Capacity to accommodate sludge formed by drilling drifts, so that the soil above the soil camera, or the erection of bulk thresholds at both ends of the camera, and the apparent thresholds in the camera periodically raised to the nominal level of lileokalani, and fill the capacity of the clay-salt slurries with high solid concentration.

The invention is illustrated by drawings, which depict schemes for the construction of filling mass of the proposed method, based on various mining and geological conditions.

Figure 1 is a diagram of the construction of filling the array with the rock ledges on both ends of the camera; figure 2 - diagram of the construction of the backfill array with bulk thresholds; figure 3 is a combined schematic construction of filling mass in the chamber with the formation of stowing capacity bulk thresholds from one end of the chamber and rock ledge with another.

On the drawings: 1 - put the camera, 2 - drift, 3 - capacity for layer-by-layer placement of clay-salt slurries and Solodov, 4 - rock ledge, 5 - bulk threshold, 6 - layer clay-salt slurry, 7 - layer slothdom.

The way bookmarks is as follows.

Capacity in laying the camera can be formed in the following ways:

- with a larger height of the chamber capacity is formed by tostrike are at the roof of the chamber 1, forming a rock ledges, in this scheme, the cost of the construction of the bulk of thresholds;

- end camera erect bulk rapids - 2, this method is effective for cameras, the height of which is approximately equal to the height of the drifts;

in oblique cameras you can create containers for each of the methods mentioned above, as well as combining them. For example, in the upstream end of the chamber erect bulk threshold, and in the lower end of the chamber form a rock ledge - 3.

In the camera 1 original form filling tank 3 for placement of clay-salt slurries. The container 3 can be created by filling thresholds 5 at the beginning and end of the camera 2, or a rock ledges 4 at the beginning and end of the camera due to the excavation drifts 2 in roof layer - 1, or a combination of bulk thresholds 5 and rock ledges 4 - 3.

In tank 3, formed one of the following methods, originally served clay-salt slurries, tailings potash ores. Clay-salt sludge is served or until the soil level of the lower drift 2, or to the top of the bulk threshold. As the sedimentation of the solid part of the clay-salt brine sludge lightened and removed. The camera remains the layer of sediment clay-salt slurry 6. Then form the bulk threshold of 5 by drift 2, which are stowing, increasing it to the races is to maintain level bookmarks and serves the pulp from slothdom. Soledad gradually cover with a layer of deposited clay-salt slurry 6, displacing brine from the camera. The flow of the pulp colodado to produce the calculated (design) level capacity lileokalani 7. Under the weight of the layer of colodado 7 layer clay-salt slurry 6 is sealed, and the upper part is mixed with lileokalani.

The height of the rapids or rock ledges define the conditions of placement of calculated mass of clay-salt slurry and its consistency when serving in the camera.

To minimize costs thresholds in the chamber, it is expedient to apply the clay-salt slurries with high solid content.

The mass of the solid part of the clay-salt sludge fed to the camera is determined by the formula:

where MSHK- weight of the solid part of the clay-salt slurry placed in the chamber, t;

MSC- weight of colodado that can be placed in the chamber without regard to clay-salt slurries, t;

C+W is the sum of the parts of Solodov and clay-salt sludge coming from the enrichment process, provided that:ø the relationship of parts of Solodov and clay-salt sludge coming from the enrichment process.

Filling the chamber of clay-salt slurries produced in such an amount that the mass of the solid part was greater than or equal to the mass produced Glynis what about the salt slurry (solid), formed in the enrichment process.

Because of the small thickness of the layer of clay-salt slurry and mixing it with lileokalani, as backfill array in the layer tab is the same as a regular tab chambers lileokalani.

Supply colodado in the camera is performed not immediately, but after a certain period of time for that to happen the precipitation of the solid part of the clay-salt sludge and clarification of brine released from the sludge. Removing the clarified brine from the chamber prevents silting of assolombarda.

Filling the chamber with the pulp of the clay-salt slurries produced in such an amount that the mass of the solid part was greater than or equal to mass produce clay-salt slurry (solid), resulting in the enrichment process. As the mass ratio of Solodov and clay-salt slurry (W:W) in the potash companies is (30÷15):1, with an average camera height 6 m layer of sludge should be 20-40 see

Compliance with this ratio it is necessary to adjust the volume of the placed clay-salt slurry in the chamber and thus to make the total volume to be created of clay-salt slurry with the beneficiation of ores without deterioration of physical and mechanical properties of the backfill array.

Tests of the proposed technology PEFC is Inoi bookmarks in one camera clay-salt slurries and Solodov held on the Second Solikamsk mine. At the lower end of the chamber, subject to the tab, there was a rock ledge, and at the upper end of the chamber took the threshold. In the chamber formed filling the tank, which was filed clay-salt slurry to the soil level of the lower roadway. After a 12-hour sedimentation of clay-salt sludge and clarification of brine in the chamber gave the pulp from slothdom.

At the time of filing of the pulp colodado extrusion deposited clay-saline sludge occurred. The camera was placed 880 tonnes of solid part of the clay-salt slurry. Weight colodado built into the camera, was 18400 so

The ratio of colodado to clay-salt slurry backfill array 20.9:1, lower than the same ratio obtained by enrichment.

An example implementation of the invention is as follows:

Calculated in a known manner a lot of colodado that can be placed in the chamber without regard to sludge MSC. The relationship of parts of Solodov and clay-salt sludge coming from the enrichment process at the time the bookmark a specific camera, With:W is known, for example, 20:1, and therefore, the sum of the parts of Solodov and clay-salt sludge coming from the enrichment process, With+W=21.

For example, you need to place 18400 t Solodov, in this case, the sludge can be placed:

Use the s of the proposed method when hydrobalance of colodado to provide full accommodation slimes formed during the processing of metals.

1. The method of layer-by-layer bookmarks clay-salt slurries and Solodov in one camera, including education in the chamber filling capacity, separate transportation and warehousing Solodov and clay-salt sludge, drainage settled brine, characterized in that initially filling the chamber capacity fill clay-salt slurries, and after settling clay-salt sludge and clarification of brine in the chamber serves the pulp from colodado to complete its fill, the weight of the solid part of the clay-salt slurry supplied into the chamber, determined by the formula:

where MSHK- weight of the solid part of the clay-salt sludge placed in the chamber, t;
MSC- weight of colodado that can be placed in the chamber without regard to clay-salt slurries, t;
C+W is the sum of the parts of Solodov and clay-salt sludge coming from the enrichment process, provided that:ø the relationship of parts of Solodov and clay-salt sludge coming from the enrichment process.

2. The method according to claim 1, characterized in that the chamber is filled clay-salt slurries with high solid concentration.

3. The method according to claim 1, characterized in that the capacity to host clay-salt slurries formed by drilling drifts so that their soil is Ahotels above the soil chamber.

4. The method according to claim 1, characterized in that the capacity to host clay-salt slurries formed by the erection of artificial thresholds at both ends of the camera.



 

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FIELD: mining, particularly to develop valuable mineral deposits along with goaf filling.

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2 tbl

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