Mine venting method and device

FIELD: mining, particularly to vent ore and rock mines.

SUBSTANCE: method involves mixing fresh and exhaust air by blasting fuel mixture; forming suction jet, which discharges exhaust air outside the mine. Fuel mixture components are supplied by compressed nitrogen. Air mixing is performed with the use of mixture including sodium permanganate and hydrogen peroxide taken in ratio of 1:(3-10). The suction jet is formed by exhaust air ejection. Venting plant is arranged at bottom mine level. Device comprises body with nozzle arranged over fuel mixture and control panel. The device additionally has nitrogen, sodium permanganate and hydrogen peroxide vessels. Venting pipeline is secured to body nozzle. The venting pipeline is provided with jets to supply hydrogen peroxide and sodium permanganate connected with compressed nitrogen cylinder through control panel. The venting pipeline is composed of separate sections put one on another and provided with conical flares. The flares and adjacent sections define annular air suction slots.

EFFECT: provision of independent operation, simplified structure, increased operational safety and reduced power inputs for mine venting.

1 cl, 1 tbl, 2 cl

 

The invention relates to mining and can be used for artificial ventilation of mines (quarries), which is the extraction of metallic and non-metallic minerals.

The known method of intensification of exchange in career (RF patent No. 2099537, IPC 7 E 21 F 1/00, epubl). The invention consists in a secure exchange between the stagnant zone and the surface of a career with any degree of stability of its atmosphere. To achieve these objectives the inventive method includes the cyclical movements in the airspace career from its surface to the stagnant zone and back gatavodama shell large volume, with each cycle is accompanied by the placement of the inside of the shell portion of fresh air, his substitution in the stagnant zone of the polluted air and the subsequent moving of a portion of the contaminated air to the surface of the career and replace with fresh. The disadvantages of this device are manufacturing complexity and low efficiency of ventilation.

There is a method of ventilation of the mine adopted for the prototype in terms of method (patent RF №2162944, IPC 7 E 21 F 1/00, epubl). The method includes cascading horizontal placement of ventilation systems, mixing of fresh and exhaust air. As ventilation systems use installation is, creates an air-fuel mixture. Mixing of fresh and exhaust air produced by the detonation of fuel-air mixture. For the formation of the suction jet issuing the exhaust air outside of the quarry, blast first air-fuel mixture in the upper horizon, and then sequentially to the bottom. The number of cascades, the amount of fuel supplied to the fuel-air mixture, and undermine uniformity between the cascades determined empirically. The disadvantage of this method is the necessity to use for ventilation multiple venting installations.

A device for ventilation of deep pits (RF patent No. 2143076, E 21 F 1/00, epubl.) The device includes a flexible exhaust pipe with toroidal chambers stiffness, spaced along its length and filled with light inert gas, a device to move the device, electric heating elements mounted on the supporting frame, a power plant in the form of a turbine and motor-generator and Teploobmennik made of screened films. Additionally the device has a vertical telescopic hollow shaft, which strengthened wheel with curved blades and impeller. The profile of the lower wing surface of the impeller and the profile of the upper surface of the curvilinear Palast the wind turbine is designed in such a way that form in the joint motion of the cavity in the form of a tapering cone of rotation. The axis of the cone coincides with the axis of the telescopic hollow shaft. Between the impeller and propeller in the hollow shaft holds the outlet and the turbine inlet provided window. The disadvantage of this device is the inability of Autonomous work, complexity, and low efficiency of ventilation.

A device to ventilate mines, adopted as a prototype of the device (the application for the invention of the Russian Federation No. 94040233, IPC E 21 F 1/00, epubl). The inventive device to ventilate mines is the case with the power mechanism and the remote control, connected to a communication with him. The lift mechanism is made of two parts. The lower part has a cumulative seizure with an explosive charge. The top separated from the bottom of the jumper and made of slow-burning fuel mixture. The housing has a nozzle placed above the fuel mixture. The enclosure is suspended on a wire cable, United telecommunications fuzes, placed on the upper and lower parts of the power mechanism. After running the nozzle enters the channel, undermining the fuel mixture and the cumulative part of creating atmospheric shock wave directed to the bottom of the quarry. Dragged the net atmospheric flows down vytesnyayut from the pit of stagnant gas environment. The disadvantage of this device is the inability of Autonomous work, the complexity and high risk operation.

The technical result of the invention is the possibility of the autonomy of the device, simplifying the design and improving the safety of operation.

The technical result is achieved in that in the method of ventilation of the mine ventilation system, consisting in mixing of fresh and exhaust air through detonation of the mixture, the formation of the suction jet issuing the exhaust air outside of the quarry, according to the invention the components to undermine served with compressed nitrogen, and the stirring of air is realized by using a mixture comprising sodium permanganate and hydrogen peroxide at a ratio of 1:(3÷10), while the suction jet is formed due to the effect ejection of exhaust air, and the air handling unit is placed on the lower elevation of the mine.

The technical result in part of the device is achieved in that the device for ventilation of a mine, comprising a housing with a nozzle placed above the fuel mixture, remote control, according to the invention it is provided with tanks for nitrogen, hydrogen peroxide and sodium permanganate, ventilazione pipeline, mounted on the nozzle body, which is equipped with nozzles for supplying PE is ekici hydrogen and sodium permanganate, connected through remote control with capacity of compressed nitrogen with a ventilation pipe made of composite of wearing each other sections with tapered sockets, forming with the adjacent sections of the ring slit for air leaks.

The use of the invention in comparison with the prototype provides Autonomous operation of the device, to simplify the design and increase the safety of operation.

The method of ventilation of the mine and the device for its implementation is illustrated in the drawing, where:

1 - body;

2 - nozzle body 1;

3 - nozzle for supplying hydrogen peroxide;

4 - injector for the supply of sodium permanganate;

5 - supply hoses;

6 - capacity with sodium permanganate;

7 - capacity with hydrogen peroxide;

8 - remote control;

9 - tank of compressed nitrogen;

10 is a section of vent pipe;

11 - conical funnel sections 10;

12 is an annular slit;

13 - the direction of the flow.

The method is designed for ventilation of deep mines and quarries and is carried out as follows. On the lower elevation of the mine (quarry) place the ventilation device. Then carry out periodic undermining mixture consisting of sodium permanganate and hydrogen peroxide. The number of interacting sodium permanganate and hydrogen peroxide accept what I see when following their ratio of 1:(3÷ 10). The uniformity of undermining by mixing hydrogen peroxide and sodium permanganate determined empirically depending on the desired intensity of the ventilation of the mine. When periodic detonation of the mixture along the length of the vent pipe occurs, the air moving, which is due to effect ejection podsushivaet exhaust air and promotes mixing of fresh and otrabotanny air. Using detonation of the mixture and the resulting detonation of gas-vapor mixture, form due to the effect ejection of the suction jet issuing the exhaust air outside of the mine. The lower limit of the ratio of permanganate sodium to hydrogen peroxide to 1:10 passed from the condition of minimum effective temperature of the gas mixture, and the upper limit of 1:3 adopted from conditions thermal resistance of the material of the body 1 and the nozzle 2. Data on the temperature of the gas mixture given in the table.

450
Hydrogen peroxide pieces11106432
The sodium permanganate, parts111111
The temperature of the gas mixture, °1090990780250220

Device for ventilation of the mine is as follows. In case 1 placed in the upper part of the nozzle 2 is fed through a nozzle 4 for supplying sodium permanganate, and a nozzle 3 for supplying hydrogen peroxide, respectively, sodium permanganate and hydrogen peroxide. In the nozzle 3 and 4 hydrogen peroxide and permanganate sodium pump on the inlet hose 5 from the tank 7 with hydrogen peroxide and a capacity of 6 with sodium permanganate. To create pressure in the system and adjust the flow of reagents used compressed nitrogen, inert to hydrogen peroxide and sodium permanganate supplied from the tank 9 with compressed nitrogen through the control panel 8. Remote control 8 doses portions of the reactants and the frequency of their submission to adjust the intensity of the ventilation of the mine. When mixing hydrogen peroxide and sodium permanganate reaction occurs, accompanied by a large selection of gas-vapor mixture, which, moving on vent pipe causes mixing of exhaust air and forms due to the effect ejection of the suction jet moving in the direction of flow 13. Section 10 of the vent pipe have tapered sockets 11, forming a conical slit 12 along the length of the vent pipe. The depth of the dressing neighboring s is s 10 in each other determine empirically secure effect ejection, causing a leak of exhaust air and carrying it outside of the mine.

The application of this method of ventilation of the mine and device for its implementation provides the following benefits:

- autonomy of operation of devices of this type;

- simplify the design of the device.

- improving the safety of operation;

- reducing energy consumption for ventilation of the mines.

1. The method of ventilation of the mine ventilation system, consisting in mixing of fresh and exhaust air through detonation of the mixture, the formation of the suction jet issuing the exhaust air outside of the mine, characterized in that the components to undermine served with compressed nitrogen, and the stirring of air is realized by using a mixture comprising sodium permanganate and hydrogen peroxide at a ratio of 1:(3÷10), while the suction jet is formed due to the effect ejection of exhaust air, and the air handling unit is placed on the lower elevation of the mine.

2. Device for ventilation of a mine, comprising a housing with a nozzle placed above the fuel mixture, remote control, characterized in that it is equipped with tanks for nitrogen, hydrogen peroxide and sodium permanganate, vent pipe, mounted on the nozzle body, which is equipped with nozzles for supplying peraki and hydrogen and sodium permanganate, connected through remote control with capacity of compressed nitrogen with a ventilation pipe made of composite of wearing each other sections with tapered sockets, forming with the adjacent sections of the ring slit for air leaks.



 

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FIELD: mining industry.

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EFFECT: higher efficiency.

2 dwg

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