Pit ventilation method

FIELD: mining.

SUBSTANCE: method involves installation of ascending air pipeline channels on board and beyond the limits of the pit and their connection by main air pipeline channels, arrangement of suction holes of air pipeline channels in working zones of the pit, creation of natural draft in channels due to wind head and air temperature difference inside and outside the channels, movement of contaminated air along channels beyond the pit levels and control of its flow. During winter time the movement of contaminated air from ascending channels installed aboard the pit to ascending channels located beyond the pit limits is performed along bypass air pipeline channels flooded in natural water sources. Control of the air flow removed from the pit is provided by changing the ratio of air flow rates in bypass and main channels.

EFFECT: increasing pit ventilation efficiency.

1 dwg

 

The invention relates to the mining industry and can be used in the ventilation of deep quarries located in the valleys of large rivers.

A known method of ventilation career, including accommodation in mined-out space of the suction duct, the duct of a natural draught due to wind pressure and the movement of polluted air in the duct beyond the quarry (ed. mon. The USSR №883492, publ. 23.11.1981, bull. No. 43).

The disadvantage of this method of ventilation is the inability of its use in calm weather.

A known method of ventilation, including the installation of the ascending air-conducting channels on Board and outside career and connection to their main air-conducting channels, the placement of the suction holes of the air-conducting channels in the working areas of the pit, creating channels of a natural draught due to temperature differences between the air inside and outside of the channels, the movement of polluted air on channels outside career and regulating its flow (autospid. The USSR №1742493, publ. 23.06.1992, bull. No. 23).

The disadvantage of this method of ventilation, taken as a prototype, is the low efficiency of its use in periods of lower intensity of solar radiation in the cold season.

Object of the invention is to provide Uchenie maximum size of natural draught air-conducting channels when changes in ambient temperature and low intensity of solar radiation.

This is achieved by the fact that in the method of ventilation career, including installation of the ascending air-conducting channels on Board and outside career and connection to their main air-conducting channels, the placement of the suction holes of the air-conducting channels in the working areas of the pit, creating channels of a natural draught due to wind pressure and temperature differences between the air inside and outside of the channels, the movement of polluted air on channels outside career and regulating its flow, in cold seasons, the movement of polluted air from the upstream channels that are installed on Board career, rising to channels outside the pit, carried out by the bypass air-conducting channels, flooded in natural water sources and flow control are removed from the career of the air is provided by varying the ratio of the costs of air in the bypass and main canals.

Distinguishing features - the movement of polluted air by-pass channels, flooded in natural water sources, and flow control to be deleted from the quarry air by varying the ratio of the costs of air in the bypass and main canals. These features provide maximum use of natural forces in the creation and maintenance of a natural tan is in the air-conducting channels in the conditions of changing ambient temperatures and low solar radiation intensity, that leads to a new technical result.

The technical result of the proposed solution is to increase the efficiency of the ventilation of the pit.

The proposed method of ventilation career is illustrated by drawings, where 1 is the suction hole; 2 - inclined ascending air-conducting channels located inside the career; 3 - Board career; 4 - main air-conducting channels; 5 is a vertically ascending air-conducting channels located outside the career; 6 is inclined upward air-conducting channels located outside the career; 7 - outlets air-conducting channels; 8 - deflectors; 9 - by-pass air-conducting channels; 10 - the riverbed.

The method is as follows.

Suction holes 1 air-conducting channels 2 are placed in the working areas of the pit. The ducts 2 are placed on the sides 3 of the quarry. Outside the goaf air-conducting network contains a horizontal or slightly inclined main channels 4 and 5 vertical or obliquely ascending 6 outlet ports.

In the warmer months natural draft of air in the air-conducting network is supported by the energy of solar radiation. For process intensification ventilation outlet openings 7 air-conducting networks can be equipped with deflectors 8, transformed the shedding kinetic energy of the wind flow to potential energy of pressure.

In the cold season (in the freezing temperatures of atmospheric air and low intensity of solar radiation) trunk channels 4 fully or partially overlap and organize the movement of air through bypass channels 9, immersed in the channel adjacent to the quarry river 10. Relatively warm water of the river heats located in the channels 9 of the air, which expands and rushes up the ascending channels 5 and 6 air-conducting network, creating cravings with internal suction of air through the suction hole 1.

The natural warmth of the river flow is used to create and maintain traction in air-conducting channels and in the warmer months, for example at night, or in the transitional autumn and spring periods. Depending on the relative importance of the action of natural factors affecting the heating of the air through the switchgear regulate the airflow in the bypass and main canals, changing their ratio so that the total flow in the air-conducting network was maintained at the maximum level.

The application of the proposed method in deep mines located in the valleys of large rivers, improves the efficiency of natural ventilation of their atmospheres.

Method of ventilation career, including the installation of ascending vazduhoplovu the different channels on the Board outside the career and connection to their main air-conducting channels, the placement of the suction holes of the air-conducting channels in the working areas of the pit, creating channels of a natural draught due to wind pressure and temperature differences between the air inside and outside of the channels, the movement of polluted air on channels outside career and regulating its flow, characterized in that in the cold season the movement of polluted air from the upstream channels that are installed on Board career, rising to channels outside the pit, carried out by the bypass air-conducting channels, flooded in natural water sources and flow control are removed from the career of the air is provided by varying the ratio of the costs of air in the bypass and main canals.



 

Same patents:

FIELD: mining.

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FIELD: mining.

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Air flow controller // 2439330

FIELD: construction.

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14 cl, 9 ex, 18 dwg

FIELD: mining.

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FIELD: mining.

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7 cl, 3 dwg

FIELD: process engineering.

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FIELD: mining industry.

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1 dwg, 1 ex

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EFFECT: higher efficiency.

4 dwg

FIELD: mining industry.

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EFFECT: higher personnel safety, higher efficiency.

4 dwg

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3 dwg

FIELD: mining industry, particularly to form venting system, which controls thermal mine conditions during combined mining.

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2 dwg

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

1 cl, 1 tbl, 2 cl

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