The composition for fixing dusty surfaces

 

(57) Abstract:

Use: for fixing the dust-forming surfaces on the piles of rocks, tailings, avtodorogam. The composition contains components in the following ratio, wt.%: the potassium tripolyphosphate is 0.01 to 5.0, 5% colloidal solution of starch 1.0 to 40.0 and water - the rest. The components of the composition have no harmful effects on the environment, promote germination and growth of vegetation.

The invention relates to the mining industry, and is intended for fixing the dust-forming surfaces on the piles of rocks, tailings, the road.

There is a method of dust suppression on the piles, which consists in coating the surface of the composition when the following ratio, wt.%: Sulfite-alcohol brag - ka 5,0-10,0 Polyacrylamide 0,2-0,5 Chloride salt of 10.0 to 10.0 Oceanfarmasea resin 3,0-5,0 sodium hydroxide of 0.1-0.15 Water the Rest

The disadvantage of this structure is its aggressiveness due to the presence of chloride salts and caustic soda. The application of the composition contributes to the contamination of soil and water with toxic substances. Complex and method of preparation of the compositions.

The closest in content to predective of wetting agent contains potassium tripolyphosphate in the following ratio of components, wt.%: The potassium tripolyphosphate is 0.0001 to 1.0 Water the Rest

The disadvantage of this composition is poor fixing ability of dusty surfaces.

The aim of the invention is to increase the strength of the fastening dusty surface.

This is achieved by the fact that the composition for fixing dusty surfaces, including potassium tripolyphosphate and water, optionally containing 5% colloidal solution of starch in the following ratio, wt.%: The potassium tripolyphosphate of 0.01 to 5.0 5% colloidal solution of starch 1,0-40,0 Water the Rest

When added to a composition of 5% aqueous colloidal solution of starch composition acquires a new property to secure dusty surface, forming its environmentally friendly, breathable peel. Moreover, the thickness of the crust is governed by the concentration introduced into the composition of potassium tripolyphosphate. Being a good wetting, tripolyphosphate, potassium increases the penetrating ability of the starch solution into the soil to a greater depth, which contributes to the formation and strengthening of the upper insulating layer of the soil (cover), and uniform wetting dusty surface (table 1). Precipitation formed by starch cork virtually no sbyvaetsja helps keep dust-forming layer, and when drying the fixing properties of the composition are restored.

The proposed structure is easy to manufacture, does not contain ingredients harmful effects on the environment, being nutritious organic matter, enhances germination and growth of vegetation.

The composition is obtained by dissolving 5% colloidal solution of starch in water specified in the claims concentrations.

The determination of the depth of wetting of soil composition, depending on the concentrations of potassium tripolyphosphate and starch was carried out in laboratory conditions (table.1, a test report).

From the data table.1 shows that at the same flow rate effective moistening of the soil occurs already at concentrations of potassium tripolyphosphate is 0.01%, so as the upper (minimum) limit was selected concentration of potassium tripolyphosphate, equal to 0.01%. The bottom (maximum) limit of 5% was determined economic feasibility of flow of the lubricant.

Comparative data on the effectiveness of the impact of proposed and known compositions used for fixing dusty surfaces were obtained in laboratory conditions (ASS="ptx2">

P R I m e R 1. Special trays 0.5 m2filled with soil from the dumps are placed in a wind tunnel, which make them blowing a stream of air at a rate of 0.5; 1.2 and 2.0 m/S. Determine the concentration uzmetiena dust in the pipe without affecting fixing composition. Then the surface of the soil in the trays moisturize known composition, which as of wetting agent applied potassium tripolyphosphate. After drying of the surface soil (6-9 h) the trays are placed in a wind tunnel and at the above speeds air again measure the concentration uzmetiena dust (PL. 2, PL. 3 examples 3.1 and 3.10 and 3.17 and, 3.31 and 3.38). Measuring the concentration uzmetiena dust again after 10 and 30 days (table.3 examples 3.1 b 3.6 b 3.11 b 3.16 b 3.21 b; examples 3.1 3.6 century century 3.11, 3.16), and after re-wetting by water (simulated rainfall) (table. 3 examples 3.1 g, 3.6 g, 3.11 g, 3.16 g).

Special trays 0.5 m2filled with soil from the dumps are placed in a wind tunnel, which make them blowing a stream of air at a rate of 0.5; 1.2 and 2.0 m/S. Determine the concentration uzmetiena dust in the pipe without affecting fixing composition. Then the surface of the soil in the trays moisturize prala. After drying of the surface soil (6-9 h) the trays are placed in a wind tunnel and at the above speeds air again measure the concentration uzmetiena dust (PL.3). Measuring the concentration uzmetiena dust again after 10 and 30 days, and also after re-wetting the soil surface (simulated rainfall).

The results are shown in table.3 shows that the reduction efficiency of usmeravanja dust from exposed surfaces using the proposed composition containing in addition to potassium tripolyphosphate colloidal solution of starch at concentrations of starch from 0.01 to 0.5% small (PL. 3, examples 3.2 and 3.4). The application of the composition with a specified concentration of a colloidal solution of starch does not provide fastening dusty surfaces, sufficient to keep dust, especially when wind speeds exceeding 1 m/s Noticeable retention of dust on the surface is observed when the composition with the concentration of starch is equal to 1% (table.3, examples 3.5 and 3.12 and 3.19 and, 3.26 and, 3.33 and, 3.40 (a). Therefore, as the upper (minimum) limit for a colloidal solution of starch was selected concentration of 1%.

Select lower (maximum) limit the concentration of starch is 4 the starch more than 40% dramatically increases the viscosity of the composition, it is difficult sprayed becomes hydrophobic, i.e., deteriorate its wetting properties, change the ability to moistening of the soil (table. 1, examples 7, 14, 21, 28, 35, 42); secondly, the economic feasibility of flow of the lubricant.

We offer the composition provides a decrease in the concentration of dust in its usmeravanje with exposed surfaces in the 1.6-5.5 times as compared with the known - 1.5-4.6 times.

The optimal working concentration of 5% colloidal starch and potassium tripolyphosphate selected according to the concentration from 1 to 40 and from 0.01 to 5% . The application of the proposed structure allows you to secure dusty surface and reduce smetana dust on the dumps, tailings, and other exposed surfaces of the organic composition and thereby to prevent environmental pollution.

P R I m m e R 2. In the wind tunnel was placed a tray with soil from the blade. The tray is blown by an air stream with a velocity of 1.5 m/s Concentration uzmetiena from the surface of the dust tray is determined by well-known methods. Then the surface of the soil in the tray wetted known composition, where the use of wetting tripolyphosphate potassium in the following ratios of components wt.%: Tripolyphosphate, potassium 0,0001 Water the Rest

The dust concentration is not reduced (table.2, example 2.1).

2.4. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,01 Water the Rest

This allows to reduce the concentration of dust from 3.1 to 2.8 mg/m31.1 times (see tab.2, example 2.4).

2.8. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,1 Water the Rest

This allows to reduce the concentration of dust from 3.8 to 3.2 mg/m31.2 times (see tab.2, example 2.8).

2.10. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 5,0 Water the Rest

This allows to reduce the dust concentration from 4.0 to 2.9 mg/m3from 4.0 to 2.9 mg/m31.4 times (see tab.2, example 2.10).

2.11. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 Water the Rest

This allows to reduce the concentration of dust from 2.9 to 1.9 mg/m31.5 times (see tab.2, example 2.11).

P R I m e R 3. In a wind tunnel is placed the tray with the soil from the blade. The tray is blown by an air stream with a velocity of 1.5 m/s Concentration uzmetiena from the surface of the dust tray is determined by well-known methods. Then the surface of the soil in the tray wetted proposed composition, where in addition to cytosine components, wt.%: The potassium tripolyphosphate of 0.01 to 5.0 5% colloidal solution of starch 1,0-40,0 Water the Rest

3.2. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,001 5% colloidal solution of starch 0,01 Water the Rest

This allows to reduce the concentration of dust from 3.9 to 3.5 mg/m31.1 times as compared with the known composition of 1.1 times (see tab. 3, example 3.2 (a).

3.3. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,001 5% colloidal solution of starch 0,1 Water the Rest

This allows to reduce the dust concentration from 4.0 to 3.6 mg/m31.1 times as compared with the known composition of 1.1 times (see tab.3, example 3.3 (a).

3.4. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,001 5% colloidal solution of starch 0.5 to Water the Rest

This allows to reduce the dust concentration from 4.2 to 3.0 mg/m31.4 times in comparison with the known composition of 1.4 times (see tab.3, example 3.4 (a).

3.5 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,001 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 4.4 to 2.2 mg/m3in 2 times in comparison with the known composition of 2.0 times (I 0,001 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 3.8 to 1.7 mg/m33.8 times compared with the known composition of 3.0 times (see tab. 3, example 3.7 (a).

3.9. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0,001 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.3 to 1.2 mg/m33.5 times in comparison with the known composition of 3.5 times (see tab.3, example 3.9 a).

3.12 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 4.1 to 2.1 mg/m32.0 times in comparison with the known composition of 1.8 times (see tab.3, example 3.12 a).

3.14 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 3.9 to 1.2 mg/m33.2 times compared with the known composition of 2.9 times (see tab. 3, example 3.14 a).

3.16 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.7 to 1.2 mg/who by the composition, containing, wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 4.0 to 1.9 mg/m32.1 times compared with the known composition of 1.8 times (see tab.3, example 3.19 a).

3.21 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 3.9 to 1.0 mg/m33.9 times compared with the known composition of 3.3 times (see tab.3, example 3.21 a).

3.23 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the dust concentration from 3.7 to 0.9 mg/m34.8 times compared with the known composition of 4.0 times (see tab. 3, an example 3.23 (a).

3.26. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 4.2 to 1.9 mg/m32.2 times in comparison with the known composition of 1.7 times (see tab.3, an example 3.26 (a).

3.28. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% for colloidal compared with the known composition of 3.2 times (see table.3, an example 3.28 (a).

2.30 A. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 3.4 to 0.7 mg/m35.0 times in comparison with the known composition of 3.8 times (see tab. 3, an example 3.30 (a).

3.40. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 3.9 to 1.6 mg/m32.4 times in comparison with the known composition of 1.7 times (see tab. 3, an example 3.40 (a).

3.42. The surface wetted by the following composition, containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 3.8 to 1.1 mg/m33.6 times compared with the known composition of 2.6 times (see tab.3, an example 3.42 a).

3.44. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.9 to 0.9 mg/m35.2 times in comparison with the known composition of 3.7 times (see tab.3, an example 3.44 (a).

3.2 B. Poverkhnostnoe

This allows to reduce the concentration of dust from 3.4 to 1.1 mg/m33.1 times compared with the known composition 3.1 times (see tab.3, example 3.4 (b).

3.5 B. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 50 Water the Rest

This allows to reduce the concentration of dust from 4.7 to 1.4 mg/m33.4 times compared with the known composition of 3.4 times (see tab.3, example 3.5 (b).

3.12 b. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 4.0 to 1.3 mg/m33.0 times compared with the known composition of 2.7 times (see tab.3b, example 3.12 b).

3.14 b. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 4.1 to 0.9 mg/m34.5 times compared with the known composition 4.1 times (see tab.3, example 3.14 b).

3.15 b. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.8 to 1.0 mg/m
This allows to reduce the dust concentration from 2.7 to 0.9 mg/m33.1 times compared with the known composition of 2.6 times (see tab.3, example 3.22 b).

3.24 b. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the dust concentration from 4.0 to 0.9 mg/m34.5 times compared with the known composition of 3.8 times (see tab. 3, an example 3.24 b).

3.25 b. The surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.4 to 0.9 mg/m34.9 times in comparison with the known composition 4.1 times (see tab.3, an example 3.25 (b).

3.2 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 2.7 to 1.4 mg/m31.9 times in comparison with the known composition of 1.9 times (see tab.3, example 3.2).

3.4 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal who Aza compared with the known composition of 2.7 times (see table.3, example 3.4).

3.5 C. the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.8 to 1.8 mg/m32.7 times in comparison with the known composition of 2.7 times (see tab. 3, example 3.5).

3.7 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 4.0 to 2.1 mg/m31.9 times in comparison with the known composition of 1.9 times (see tab. 3, example 3.7 in).

3.9 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 4.9 to 1.6 mg/m33.0 times compared with the known composition of 3.0 times (see tab. 3, example 3.9 in).

3.10 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.3 to 1.3 mg/m33.2 times compared with the known composition of 3.2 times (see tab.3, example 10.b).

3.12 century, the wetted Surface is then possible to reduce concentration of dust from 2.9 to 1.4 mg/m32.1 times compared with the known composition of 1.8 times (see tab. 3, example 3.12).

3.14 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 4.8 to 1.5 mg/m33.3 times compared with the known composition of 3.0 times (see tab.3, example 3.14).

3.15 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.1 to 1.1 mg/m33.8 times compared with the known composition of 3.5 times (see tab.3, example 3.15 in).

3.17 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 3.1 to 1.2 mg/m32.6 times in comparison with the known composition of 2.4 times (see tab.3, example 3.17).

3.19 century, the wetted Surface composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 4.7 to 1.2 mg/m33.9 times compared with the known composition of 3.6 times the lia 10,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.8 to 1.2 mg/m34.1 times compared with the known composition of 3.7 times (see tab.3, example 3.20).

3.2, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 4.1 to 3.7 mg/m32.1 times compared with the known composition of 1.9 times (see tab.3, example 3.2 g).

3.4, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the dust concentration from 4.2 to 1.3 mg/m33.2 times compared with the known composition of 2.9 times (see tab. 3, example 3.4 g).

3.5, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.01 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.9 to 1.4 mg/m33.6 times compared with the known composition of 3.0 times (see tab.3, example 3.5 g).

3.7, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 4.3 to 2.2 mg/m
This allows to reduce the concentration of dust from 4.8 to 1.1 mg/m34.4 times compared with the known composition of 4.0 times (see tab.3, example 3.9 g).

3.10, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust in the air from 4.4 to 0.9 mg/m34.5 times compared with the known composition 4.1 times (see tab.3, example 3.10 g).

3.12, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 0.1 to 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the concentration of dust from 3.8 to 1.4 mg/m32.8 times in comparison with the known composition of 2.3 times (see tab.3, example 3.12 g).

3.14, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 4.1 to 1.0 mg/m34.2 times compared with the known composition of 3.5 times (see tab.3, example 3.14 g).

3.15, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 1,0 5% SUP> 4.6 times compared with the known composition of 3.8 times (see tab.3, example 3.15 g).

3.17, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 1,0 Water the Rest

This allows to reduce the dust concentration from 3.0 to 1.0 mg/m33.0 times compared with the known composition of 2.3 times (see tab.3, example 3.17 g).

3.19, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 10,0 Water the Rest

This allows to reduce the concentration of dust from 3.9 to 0.9 mg/m34.6 times compared with the known composition of 3.5 times (see tab.3, example 3.19 g).

3.20, the Surface wetted by the composition containing, in wt.%: Tripolyphosphate, potassium 10,0 5% colloidal solution of starch 50,0 Water the Rest

This allows to reduce the concentration of dust from 4.9 to 1.0 mg/m34.9 times in comparison with the known composition of 3.6 times (see tab.3, example 3.20 g).

The application of the proposed structure provides a consolidation of dusty surfaces, preventing vzmetayu dust.

The composition is harmless to human health, does not pollute the soil, air and water colloidal solution of starch, being PI the children to retain the soil. The composition is many times cheaper offer in similar cases compositions.

The COMPOSITION FOR FIXING DUSTY SURFACES, including potassium tripolyphosphate and water, characterized in that, to effectively consolidate dusty surfaces, it contains 5% colloidal solution of starch in the following ratio, wt.%:

The potassium tripolyphosphate of 0.01 to 5.0

5% Colloidal solution of starch from 1.0 to 40.0

Water The Rest.

 

Same patents:

The invention relates to methods for dispersed water for dust suppression

The invention relates to the mining industry and can be used when extinguishing underground fires in isolated spaces mines

FIELD: mining, particularly methods and devices to prevent dust generation in tailing pit benches by moistening thereof with water or liquid binding agent.

SUBSTANCE: device comprises self-moving vehicle, for instance pontoon water craft, provided with pump, vessel for reagent, hydraulic monitor, unit with executive tool for channel forming in bank area and isolated power generating plant. Above mechanisms are installed on water craft deck. Hydraulic monitor may rotate in horizontal and vertical planes. Drives of all mechanisms are linked with the power generating plant. Executive tool is installed below water craft floating line. Vessel for reagent is provided with proportioning device. Dust control method involves initially installing the water craft on tailing pit water surface; directing the water craft towards bank to area to be sprayed, in which working tool forms channel for water craft movement; pumping water from tailing pit into hydraulic monitor; adding reagent from vessel to water with the use of proportioning device and spraying the obtained liquid over dust-forming area. Water from tailing pit is used for above spraying operation and for water craft movement.

EFFECT: increased dust control efficiency.

2 cl, 2 dwg

FIELD: mining industry, particularly means or methods for preventing, binding, depositing, or removing dust and preventing explosions or fires.

SUBSTANCE: method involves treating dust-and-gas cloud with finely-dispersed ionized liquid, for instance with water, with the use of sprinkling plants alternately arranged so that ions of liquid spays generated by plants have opposite charges. The sprinkling plants are located outside zone of possible plant damage or are protected against explosion action. Sequence of plant alternation, ionicity, liquid quantity and liquid spraying pattern are determined from tests and calculations based on particular pit or underground mine blasting conditions.

EFFECT: reduced time of particle coagulation on liquid droplets and time of particle precipitation, possibility to reduce dust cloud propagation.

2 cl, 2 dwg

FIELD: mining industry, particularly to catch dust generated by machines and/or rigs in mines and tunnels.

SUBSTANCE: dust catcher comprises body with precipitation member formed as demister comprising moistening nozzles and drip catching means. Fan with drive is arranged near inlet/outlet side thereof. Moistening nozzles located in front of the demister in air flow direction are made as spaced multijet nozzles having separate sprayers, which form common sprayed curtain. The fan is installed in cleaned gas flow downstream the demister and drip catching means. The fan is arranged in case connected to dust catcher body. Demister is installed in contaminated air flow at inlet side and is arranged in inclined position. Upper edge thereof projects relatively lower edge. Air deflectors are arranged between the demister and drip catching means. Bottom sheet is inclined towards drip catching means. Multijet nozzles project towards contaminated air flow and are connected to load-bearing frame obliquely installed in accordance with demister inclination angle. Dust catcher is provided with separate vessels for additives, which pass through metering device into water-pipe. Mixer connected to water-pipe or built in water-pipe is installed downstream the metering device. Spraying device is arranged in front of moistening nozzles and demister with drip catching means. Spraying device comprises spraying heads, which create water mist and is connected with water source or with water-pipe and metering device with mixer. Dust-contaminated air flow is mixed with water mist and then the obtained sludge is gathered. Moist air is dried by water droplet separation and then the dried air is introduced in cleaned gas flow. Gases generated as a result of explosion are laden with water mist preliminarily mixed with additives, which create ecologically safe compositions with nitrose or similar gases formed during explosion.

EFFECT: increased operational efficiency and reduced dust catcher size.

20 cl, 8 dwg

FIELD: mining, particularly to depress dust generated during rock milling in enterprises of mining and smelting, coal, construction industries.

SUBSTANCE: plant comprises control unit, high-pressure source, siphon-type vessels filled with ionized water having opposite polarities, spraying jets, which generate fine spray, electromagnetically driven pneumatic and hydraulic valves, pressurizing and purging air channels, water pipelines, coupling members for air and water pipelines and control circuits.

EFFECT: increased dust depression efficiency.

1 dwg

FIELD: mining.

SUBSTANCE: invention is related to the field of mining, in particular, to safety issues in coal mines, namely to explosions of methane caused by friction spark created as a result of mine machines picks friction against hard rocks. Method is suggested to assess danger of rocks regarding friction inflammation of air-methane mixture, which consists in the fact that rock samples are taken, their strength and content of silicon dioxide are determined, and then tests are carried out at test bench danger of friction sparking. In order to perform test, explosive mixture is formed in test bench, and nominal cutting speed is increased 1.5 times. If at hardness of rocks f from 3 and content of silicon dioxide up to 30% no inflammations were observed and no friction sparks were produced, then rock is considered safe. If at hardness of rock from 3 to 5 and silicon dioxide content from 30 to 50% with availability of friction sparks with temperature of up to 300C and absence of inflammations, rock is considered as spark-hazardous of the 1st extent, and if their temperature is more than 300C - to spark-hazardous of the 2nd extent. If at least one inflammation occurred from friction sparks, rock is considered highly explosive. Use of suggested method makes it possible to increase safety of cleaning and preparatory works.

EFFECT: development of fundamentals for rock classification procedure by danger of friction inflammation in case of their damage with account of their physical-mechanical properties.

FIELD: mechanics.

SUBSTANCE: device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.

EFFECT: improved operational safety of device for water supply into irrigation system.

8 cl, 4 dwg

FIELD: mining.

SUBSTANCE: method includes long-term treatment of a dust and gas cloud with water vapour during the blast and afterwards. Vapour is produced by a mobile steam generator by introduction of water in it that has been heated previously up to 65-70C. The steam generator is installed in the place that is safe from the blast and is directed along with the wind. Besides, prior to blasting, atmosphere above the blasting area undergoes treatment.

EFFECT: higher efficiency of dust suppression, manoeuvrability of plants.

1 dwg

FIELD: mining.

SUBSTANCE: previously laboratory analysis is carried out on coal from a bed and its packs to detect availability of elements and substances in them that may create compounds with water; natural cracking is detected, as well as cleat in the coal bed; wells are drilled from a bottomhole by coal, with length more than by 1 m of the mine skirting cycle; water is injected into the bed with continuous measurements of the methane, water pressure, injection time; the mine is tunnelled for the value of the hydrated bed with the speed that does not exceed methane release within permissible norms; in the area of bed hydration blast holes are drilled in the sides of the mine at each cycle to detect the hydration area. During arrangement of the mine, parameters are varied, which are related to injection of water into bed, maximum reduction of the released methane, optimising arrangement of the mine.

EFFECT: higher efficiency of development of gas-bearing coal beds.

4 dwg

FIELD: mining.

SUBSTANCE: method involves supply of frozen fluid obtained by mixing with liquid gas to the worked-out space. In addition, distribution of coal dust supplied to the worked-out space is determined as to particle fractions. Distribution of the obtained frozen fluid particles as to fractions is equal to distribution of coal dust as to particle fractions.

EFFECT: improving the prevention efficiency of coal self-ignition in mines.

FIELD: mining.

SUBSTANCE: method includes spraying a liquid in a flow of air arriving to a mined space. At the same time liquid spraying is alternated with supply of dry gas into coal deposits. Moisture content in gas discharged from the coal deposit is measured. Gas supply is replaced with liquid spraying in case moisture content stops dropping in gas discharged from coal deposit.

EFFECT: improved safety of mining works.

Up!