Mine catastrophe ventilation intelligent control system

Abstract

The application discloses a mine disaster change ventilation intelligent control system, which is characterized in that: a constant opening air door is installed in every interval in a mine roadway, a constant closing air door is installed at a mine roadway air flow short circuit, and a one-way adjustable air window is installed in a working face and a mining face return air duct; the opening and closing of the constant opening air door, the constant closing air door and the one-way adjustable air window can be controlled on line; according to a mine fire occurrence position and a fire nature, the constant opening air door, the constant closing air door and the one-way adjustable air window are adjusted to realize airtight fire area fire extinguishing, flexible adjustment of a reverse air volume to control a fire and normal upward air in the mining face or the working face; the normal upward air enters a middle section roadway, a mining face air using position and a return air roadway to gather and is discharged outside a return air shaft; the system has the advantages of effective airtight fire area fire extinguishing according to a mine fire position and nature, no need of mine reverse air and no influence on normal production in a non-fire area; when the system is not suitable for closed fire area fire extinguishing, the system creates the best conditions for manual fire extinguishing by means of mine reverse air and flexible control of the fire volume to control the fire, ensures upward air in the working face and other air using positions and prevents secondary accidents, has low cost and convenient maintenance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of mine ventilation, and in particular to an intelligent control system for mine disaster ventilation. Background Art

[0002] When a mine fire occurs within the air intake tunnel or section, reverse ventilation is required to prevent toxic and hazardous fumes from entering the stope and other ventilation areas, potentially causing poisoning and asphyxiation. The "Coal Safety Regulations" and "Safety Regulations for Metal and Non-metal Mines" explicitly stipulate that "the reverse ventilation volume must be no less than 40% of the normal air supply." Ventilation systems are categorized as either unified ventilation systems or multi-stage ventilation stations. Unified ventilation systems utilize reverse ventilation with axial fans or reverse ducts with centrifugal fans. Our research team has identified Chinese patents CN 106321138A and CN 106351682A, which disclose research on reverse ventilation with fans in multi-stage ventilation stations. The currently known technologies have the following deficiencies: (1) it is impossible to regulate the air volume in the fire area to control the fire; (2) it is impossible to extinguish the fire in a sealed manner in the fire area; (3) it is impossible to achieve regional reverse wind or regional sealing; (4) when the wind is reversed, the ventilation mode of the coal mining face (coal mine) and the mining area (non-coal mine) is downward wind, which often leads to secondary accidents, especially coal mines causing excessive gas accumulation or explosion; (5) the wind pressure of the fire at the coal mining face (coal mine) and the mining area (non-coal mine) causes smoke to enter the adjacent working face or mining area and reverse the wind flow, etc.

[0003] Therefore, it is particularly urgent to develop an intelligent control system for mine disaster ventilation. Summary of the Invention

[0004] The task of the present invention is to overcome the deficiencies of the prior art and provide an intelligent control system for mine disaster ventilation, which can improve the level of disaster ventilation control and disaster reduction and relief.

[0005] The task of the present invention is accomplished by the following technical solutions:

[0006] The intelligent control system for mine disaster ventilation is equipped with normally open dampers at regular intervals in the mine tunnels, normally closed dampers at airflow short-circuit points in the mine tunnels, and one-way adjustable dampers in the return air ducts at air-consuming locations such as working faces and mining areas. The switching and opening states of the normally open dampers, normally closed dampers and one-way adjustable dampers can be controlled online. According to the location and nature of the underground fire, the switching and opening states of the normally open dampers, normally closed dampers and one-way adjustable dampers can be adjusted to extinguish the enclosed fire area, flexibly adjust the back air volume to control the fire, and ensure normal upward wind in the mining area or working face. The normal upward wind enters the middle level tunnels, mining areas and other air-consuming locations and the return air level tunnels through the air inlet shaft, and is gathered in the return air shaft for discharge outside.

[0007] Compared with the prior art, the present invention has the following advantages or effects:

[0008] (1) Since normally open dampers are set in the mine tunnels, normally closed dampers are set at the short-circuit points of the mine tunnel airflow, and one-way adjustable dampers and their online control switches are set in the return air ducts at the working face and mining area where air is used, it is possible to, based on the location and nature of the mine fire, firstly, effectively extinguish the fire in the fire area without the need for mine reverse wind and without affecting the normal production of the non-fire area; secondly, when it is not suitable to extinguish the fire in the closed fire area, the fire can be controlled by reverse wind in the mine and the air volume in the fire area can be flexibly controlled to create the best conditions for manual fire extinguishing, and ensure upward wind at the working face and other places where air is used to prevent secondary accidents.

[0009] (2) Low cost, easy maintenance, and suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The diagram is a normal ventilation diagram of an intelligent control system for mine disaster ventilation proposed in accordance with the present invention.

[0011] Figure 2 for Figure 1 The diagram shows a closed fire extinguishing diagram of a fire in the air inlet section of the system.

[0012] Figure 3 for Figure 1 The diagram shows a fire situation caused by reverse wind control in the air inlet section of the system.

[0013] Figure 4 for Figure 1 Schematic diagram of fire extinguishing in a closed fire area in the system mining area.

[0014] Figure 5 for Figure 1 The diagram shown is a schematic diagram of controlling the air volume in the fire zone when a fire occurs in the mining area of ​​the system.

[0015] The symbols in the accompanying drawings represent:

[0016] 1. Air intake shaft 2. Middle level tunnel 3. Return air level tunnel 4. Return air shaft 5. Air-using locations such as the mine 6. One-way adjustable wind window 7. Normally closed damper 8. Normally open damper 9. Airflow direction 10. Fire location

[0017] The following is a further detailed description of the invention in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0018] like Figure 1-5As shown, the present invention provides an intelligent control system for mine disaster ventilation, wherein normally open dampers (8) are installed at intervals in the mine tunnel, normally closed dampers (7) are installed at the short-circuit points of the mine tunnel airflow, and one-way adjustable dampers (6) are installed in the return air ducts of the working face and the mining area (5) where the air is used; the switch and opening states of the normally open dampers (8), normally closed dampers (7) and one-way adjustable dampers (6) can be controlled online, and according to the location (10) and nature of the underground fire, the switch and opening states of the normally open dampers (8), normally closed dampers (7) and one-way adjustable dampers (6) are adjusted to achieve fire extinguishing in the closed fire area, flexible adjustment of the reverse air volume to control the fire intensity, and normal upward wind in the mining area or working face, and the normal upward wind enters the middle level tunnel (2), the mining area (5) and the return air level tunnel (3) through the air inlet shaft (1) and is collected in the return air shaft (4) for discharge.

[0019] The process of the present invention may further be:

[0020] When a fire occurs in the air intake shaft (1), the two normally open dampers (7) in the air intake shaft (1) where the fire occurs are closed and sealed to extinguish the fire. Fresh air flows through an air intake shaft (1) where no fire occurs, passes through the middle level lane (2), the mining area and other air-using locations (5), and enters the return air level lane (3) after the air volume is adjusted through the one-way adjustable wind window (6), and is finally discharged through the return air shaft (4).

[0021] When a fire occurs in the air intake shaft (1), the openings of the two normally open dampers (7) in the air intake shaft (1) where the fire occurs are first adjusted to appropriate positions to control the amount of air passing through and thus control the fire. Then, the wind is reversed by means of fan reversal, etc., to change the switch states of the normally open dampers (8) and the normally closed dampers (7) in the return air shaft (4), the middle lane (2), and the return air lane (3), so that fresh air flows through the return air shaft (4), the middle lane (2), the mining area and other air-using locations (5), and then enters the return air lane (3) after adjusting the air volume through the one-way adjustable wind window, and finally is discharged through the two air intake shafts (1).

[0022] When a fire occurs at a wind-using location (5) such as a mining site, the normally open damper (7) of the mining site (1) where the fire occurs is closed and sealed, and the one-way adjustable damper (6) is closed to extinguish the fire.

[0023] When a fire occurs at a wind-using location (5) such as a mining site, the wind volume in the fire zone is adjusted through the one-way adjustable wind window (6) of the mining site (1) where the fire occurs, and the one-way adjustable wind window (6) of the adjacent mining site is closed under the reverse fire wind pressure operation to prevent high-temperature smoke from entering.

[0024] Example

[0025] Reference Figure 1During normal ventilation, when no fire occurs anywhere underground, fresh air flows through two air intake shafts (1), through the middle level tunnel (2), and through the wind-using areas (5) such as the mine. After the air volume is adjusted by the one-way adjustable wind window, it enters the return air level tunnel (3) and is finally discharged through the return air shaft (4). The wind flow in the wind-using areas (5) such as the mine is upward.

[0026] Reference Figure 2 If a fire occurs in an air intake shaft (1) below the mine, a closed fire zone is adopted to extinguish the fire. The two normally open dampers (7) in the air intake shaft (1) where the fire occurs are closed and sealed to extinguish the fire. Fresh air flows through an air intake shaft (1) where no fire occurs, passes through the middle level lane (2), the mining area and other air-using locations (5), and after the air volume is adjusted by the one-way adjustable wind window, enters the return air level lane (3), and finally is discharged through the return air shaft (4). The air flow in the mining area and other air-using locations (5) is upward wind.

[0027] Reference Figure 3 When a fire occurs in an air intake shaft (1) below the mine, the mine area is reversed and the air volume in the fire area is regulated to control the fire. The openings of the two normally open dampers (7) in the air intake shaft (1) where the fire occurs are adjusted to appropriate positions to control the air volume passing through and thus control the fire. The wind is reversed by means of fan reversal, and the switch states of the normally open dampers (8) and normally closed dampers (7) in the return air shaft (4), the middle level tunnel (2), and the return air level tunnel (3) are changed to realize fresh air flow through the return air shaft (4), the middle level tunnel (2), the wind-using places (5) such as the mining field, etc., and then the air volume is adjusted by the one-way adjustable wind window before entering the return air level tunnel (3), and finally discharged through the two air intake shafts (1). The wind flow in the wind-using places (5) such as the mining field is upward wind.

[0028] Reference Figure 4 If a fire occurs in a mine stope (5), a closed fire zone shall be adopted for fire extinguishing. The normally open dampers (7) of the stope (1) where the fire occurs shall be closed and the one-way adjustable dampers (6) shall be closed to extinguish the fire. Other stopes and other air-using locations (5) shall be ventilated normally and the wind flow shall be upward.

[0029] Reference Figure 5 , a fire occurs in a mining area (5) under the mine, and the fire is controlled by regulating the air volume in the fire area. The air volume in the fire area is regulated by the one-way adjustable wind window (6) of the mining area (1) where the fire occurs. The one-way adjustable wind window (6) of the adjacent mining area is closed under the reverse fire wind pressure operation to prevent high-temperature smoke from entering. Other mining areas and other air-using locations (5) are ventilated normally and the wind flow is upward.

[0030] As described above, the present invention can be better implemented. The above embodiments are only the best implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Other changes, modifications, replacements, combinations, and simplifications made without departing from the spirit and principles of the present invention should be considered equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. An application method of a mine disaster ventilation intelligent control system, characterized in that: The invention discloses an intelligent control system for mine disaster ventilation, comprising: installing normally open dampers (8) at intervals in a mine tunnel, installing normally closed dampers (7) at a short-circuit point of the mine tunnel airflow, and installing one-way adjustable dampers (6) in the return air duct of an air-using location (5) including a working face and a mining area; the switch and opening states of the normally open dampers (8), normally closed dampers (7) and one-way adjustable dampers (6) can be controlled online; according to the location (10) and nature of an underground fire, the switch and opening states of the normally open dampers (8), normally closed dampers (7) and one-way adjustable dampers (6) are adjusted to achieve fire extinguishing in a closed fire area, flexible adjustment of the reverse air volume to control the fire intensity, and normal upward wind in the mining area or working face; the normal upward wind enters the middle level tunnel (2), the air-using location (5) and the return air level tunnel (3) through the air inlet shaft (1), and is gathered in the return air shaft (4) for external discharge; and the application method comprises the following steps: During normal ventilation, if there is no fire at any location underground, fresh air flows through the two air intake shafts (1), through the middle level tunnel (2), and the air consumption location (5), and then enters the return air level tunnel (3) after the air volume is adjusted by the one-way adjustable wind window, and finally discharged through the return air shaft (4). The air flow at the air consumption location (5) is upward. When a fire occurs in the air intake shaft (1): if the air intake shaft section is suitable for fire extinguishing in a closed fire zone, the closed fire zone fire extinguishing method is adopted, and the two normally open dampers in the air intake shaft where the fire occurs are closed and the fire is extinguished; the fresh air flows through an air intake shaft (1) where no fire occurs, through the middle level lane (2), the air use location (5), and after the air volume is adjusted by the one-way adjustable wind window, it enters the return air level lane (3), and finally is discharged through the return air shaft (4). The air flow at the air use location (5) is upward wind; if the air intake shaft section is not suitable for fire extinguishing in a closed fire zone, the mine area is reversed and the air volume in the fire zone is regulated. To control the fire, the two normally open dampers in the air inlet shaft where the fire occurs are adjusted to an appropriate position to control the air volume to control the fire; the wind is reversed by reversing the fan, and the switch states of the normally open dampers (8) and the normally closed dampers (7) in the return air shaft (4), the middle lane (2), and the return air lane (3) are changed, so that fresh air flows through the return air shaft (4), the middle lane (2), the air consumption location (5), and then enters the return air lane (3) after the air volume is adjusted by the one-way adjustable wind window, and finally discharged through the two air inlet shafts (1). The air flow at the air consumption location (5) is upward wind; When a fire occurs at the ventilation location (5), if the ventilation location is suitable for extinguishing the fire in a closed fire area, the fire is extinguished in a closed fire area. The normally open dampers of the mining area (1) where the fire occurs are closed and the one-way adjustable wind window (6) is closed to extinguish the fire. The ventilation location (5) is normally ventilated and the wind flow is upward. If the ventilation location is not suitable for extinguishing the fire in a closed fire area, the fire is controlled by adjusting the wind volume of the fire area. The wind volume of the fire area is adjusted by the one-way adjustable wind window (6) of the mining area (1) where the fire occurs. The one-way adjustable wind window (6) of the adjacent mining area is closed under the reverse fire wind pressure operation to prevent high-temperature smoke from entering. The ventilation location (5) is normally ventilated and the wind flow is upward.

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