Independent ventilation structure and method for multifunctional underground mine chamber

Abstract

The invention relates to the technical field of underground ventilation systems, and particularly discloses an independent ventilation structure and method for an underground mine multifunctional chamber. Comprising a first air inlet roadway, an automatic auxiliary air door, a multifunctional chamber, a first air return trolley, a first air return shaft, a second air return roadway, an auxiliary fan, a main air return duct, a second air return shaft and a main fan which are sequentially communicated. The multifunctional chamber pumps indoor air into a first air return shaft through a first air return trolley and pumps the indoor air into a main air return duct through an auxiliary fan communicated with a second air return roadway, and the main air return duct pumps air in the main air return duct to the ground through the second air return shaft and a main fan on the second air return shaft. The local independent ventilation requirements of various underground chambers can be practically met, reliable technical support and guarantee are provided for mine safety production, and remarkable economic benefits and social benefits are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground ventilation system, in particular to a structure and method for independent ventilation of multifunctional underground mine chamber. BACKGROUND

[0002] In the current underground mine operating environment, there are generally problems in the ventilation systems of important function chambers such as temporary oil depot, temporary storage of explosive materials chamber, temporary storage of explosives chamber, ore drawing chamber and car washing chamber. The ventilation conditions of these key places are worrying, mainly manifested in that the local ventilation system design is unreasonable, the airflow organization is disorderly, and even some chambers completely lack independent return air system. This poor ventilation condition not only affects the normal play of the chamber function, but also poses a serious threat to the safety and stability of the underground operating environment.

[0003] The mine ventilation system is one of the important components of the mine production system. The mine ventilation system is relatively complex and has many air control facilities, which can easily lead to instability of the mine ventilation system and affect the safety of mine production. With the use of mine charging car equipment and the increase of mining depth, the amount of toxic and harmful irritating gases such as carbon monoxide is gradually increasing. However, the traditional design concept does not fully consider the independent ventilation problem of chambers such as charging chamber, oil depot, car washing chamber and temporary storage of blasting materials, and there are certain ventilation safety hazards on site.

[0004] As shown in Figure 3 , the existing underground chambers generally adopt a through ventilation mode. Two independent channels are generally designed for the chamber, fresh air flows into one channel, and the other channel flows out. After the fresh air flows flush the chambers, it may mix into the air inlet tunnel, which can easily lead to fresh air carrying dust from the ore drawing chamber, irritating odor from the charging chamber and mist from the car washing chamber. SUMMARY

[0005] The purpose of the present application is to provide a multifunctional chamber independent ventilation system suitable for underground mines and its supporting implementation method, which can effectively solve the local independent ventilation needs of various underground chambers, provide reliable technical support and protection for mine safety production, and has significant economic and social benefits.

[0006] The purpose of the present application can be achieved by the following technical solutions: A structure for independent ventilation of a multi-functional chamber in an underground mine includes a first intake airway, an automatic auxiliary air door, a multi-functional chamber, a first return air trolley, a first return air shaft, a second return airway, an auxiliary fan, a main return air duct, a second return air shaft, and a main fan, which are connected in sequence. The multi-functional chamber controls whether air flows into the multi-functional chamber through the automatic auxiliary air door. The multi-functional chamber draws indoor air into the first return air shaft through the first return air trolley, and draws it into the main return air duct through the auxiliary fan connected to the second return airway. The main return air duct draws the air in the main return air duct to the ground through the second return air shaft and the main fan on the second return air shaft.

[0007] Furthermore, a third air intake channel is connected in parallel to the input and output terminals of the multi-functional chamber. An auxiliary air damper is installed on the third air intake channel, which is used to open and close the third air intake channel.

[0008] Furthermore, multiple second air intake tunnels are connected in parallel in the middle of the first air intake tunnel. These multiple second air intake tunnels are used to introduce air into the ventilation tunnels around the panel area. The ventilation tunnels are sequentially connected to the third return air shaft, the second return air tunnel, and the third return air tunnel.

[0009] Furthermore, the ventilation tunnel includes a first ventilation tunnel and a second ventilation tunnel that are connected end to end.

[0010] Furthermore, the third return airway is connected to the input end of the main return airway.

[0011] Furthermore, a purification water tank is installed in the middle of the main return air duct. The gas entering at the input end of the main return air duct is purified by the purification water tank and then flows out to the output end of the main return air duct.

[0012] Furthermore, the bottom of the purified water tank has a first inclined surface near the input end and a second inclined surface near the output end. The slope and height of the first inclined surface are both smaller than those of the second inclined surface.

[0013] Furthermore, a toxic gas detection sensor is installed at the end of the second return airway.

[0014] The purpose of this application is also to provide a method for independent ventilation of a multi-functional underground mine chamber, using any of the above-mentioned solutions for independent ventilation of a multi-functional underground mine chamber, including the following steps: By controlling the automatic opening of the automatic auxiliary air damper, air is introduced into the multi-functional chamber through the first air intake tunnel for ventilation inside the multi-functional chamber. The air introduced into the multi-functional chamber is then drawn away through the first return air shaft, the second return air tunnel, and the auxiliary fan, maintaining the air circulation direction from the input end to the output end of the multi-functional chamber. The air output from the auxiliary fan to the main return air duct passes through the main return air duct, the second return air shaft, and the main fan in sequence, maintaining the airflow direction before being discharged to the ground.

[0015] Furthermore, by connecting a third air intake roadway in parallel at the input and output ends of the multi-functional chamber, and by opening the third air intake roadway through an auxiliary air door, the underground air circulation of the multi-functional chamber is achieved.

[0016] The beneficial effects of this invention are: This invention first establishes a comprehensive local independent ventilation system for various functional chambers requiring independent ventilation underground, ensuring that they are both independent and coordinated with the main ventilation system. Second, the newly independently set ventilation structure effectively solves the problem of interference from pollutants such as heat, water mist, dust, and harmful odor gases generated during the operation of various chambers on the overall underground ventilation system. More importantly, in the event of an accidental fire in high-risk locations such as temporary oil depots, explosives storage chambers, or toxic gas storage chambers, the remote control of automatic damper closure and increased frequency of auxiliary and main fans in the independent ventilation structure of this multi-functional chamber can maximize the control of the spread of the disaster and the diffusion of toxic gases. Compared with existing multi-functional chambers located at the end of the intake roadway, this invention improves the safety of multi-functional chambers and significantly reduces the losses to the overall safety of the underground mine. In addition, the overall structural design of this invention is simple and efficient, and the ventilation route is scientific and reasonable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an independent ventilation structure for a multi-functional underground mine chamber, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the water purification tank in an embodiment of the present invention; Figure 3 This is a schematic diagram of the existing ventilation system in the relevant chambers; In the diagram: 1. First intake airway; 2. Fresh airflow; 3. Second intake airway; 4. Automatic damper; 5. Auxiliary damper; 6. Multifunctional chamber; 7. First return air shaft; 8. First ventilation airway; 9. Second ventilation airway; 10. Third return air shaft; 11. Second return airway; 12. Third return airway; 13. First return airway; 14. Auxiliary fan; 15. Toxic gas detection sensor; 16. Stale air; 17. Purified water tank; 18. Main return air duct; 19. Second return air shaft; 20. Main fan; 21. Third intake airway. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, a structure for independent ventilation of a multi-functional chamber in an underground mine includes a first intake airway 1, an automatic auxiliary air door 5, a multi-functional chamber 6, a first return air trolley, a first return air shaft 7, a second return airway 11, an auxiliary fan 14, a main return air duct 18, a second return air shaft 19, and a main fan 20, which are connected in sequence. The multi-functional chamber 6 is controlled by the automatic auxiliary air door 5 to control whether air flows into the multi-functional chamber 6. The multi-functional chamber 6 draws indoor air out to the first return air shaft 7 through the first return air trolley, and draws it into the main return air duct 18 through the auxiliary fan 14 connected to the second return airway 11. The main return air duct 18 draws the air in the main return air duct 18 to the ground through the second return air shaft 19 and the main fan 20 on the second return air shaft 19.

[0021] Its working principle is that fresh airflow 2 enters from the first intake airway 1, washes the multi-functional chamber 6, and then passes through the first return air shaft 7 and the first return airway 13. It is then separately drawn to the main return airway 18 by the auxiliary fan 14. After being purified by the purification water pool 17, it is discharged to the ground through the main return airway 18, the second return air shaft 19, and the main fan 20. Except for the arrows marked in the attached diagram, the other arrows indicate the direction of air circulation.

[0022] The multi-functional chamber 6 can be designed as a temporary oil depot, a temporary storage chamber for explosives, a temporary storage chamber for ore, a car wash chamber, a charging chamber, etc. The automatic air door 4 is a fireproof, smoke-proof, and automatically opening door. The automatic air door 4 includes a remotely controllable automatic window and door, allowing for real-time remote monitoring and effective control of the airflow entering the multi-functional chamber 6. In the event of a disaster or abnormal gas generation in the multi-functional chamber 6, the automatic air door 4 can be remotely closed to prevent toxic, harmful, high-temperature, and irritating gases from entering the second intake roadway 3, the first ventilation roadway 8, and the second ventilation roadway 9, thus affecting normal ventilation in other areas of the mine. Compared to the existing loop-shaped ventilation structure, this design further improves the safety of the multi-functional chamber 6.

[0023] In some embodiments, a third air intake channel 21 is connected in parallel to the input and output terminals of the multi-functional chamber 6. An auxiliary air damper 5 is provided on the third air intake channel 21, which is used to open and close the third air intake channel. By connecting the third air intake channel 21 in parallel to the input and output terminals of the multi-functional chamber 6 and opening the third air intake channel 21 through the auxiliary air damper 5, the underground air circulation of the multi-functional chamber 6 is achieved. This forms a redundant design. When the automatic air damper 4 is remotely controlled to close, the air circulation of the multi-functional chamber 6 can be accelerated, thus speeding up the removal of toxic gases.

[0024] In some embodiments, a plurality of second air intake channels 3 are connected in parallel in the middle of the first air intake channel 1. The plurality of second air intake channels 3 are used to introduce air into the ventilation channels around the panel area. The ventilation channels are sequentially connected to the third return air shaft 10, the second return air channel 11 and the third return air channel 12.

[0025] In some embodiments, the ventilation tunnel includes a first ventilation tunnel 8 and a second ventilation tunnel 9 connected end to end. The first ventilation tunnel 8 and the second ventilation tunnel 9 can surround the perimeter of the panel area, ensuring fresh air around the panel area and facilitating operations for panel area personnel.

[0026] In some embodiments, the third return air duct 12 is connected to the input end of the main return air duct 18. This can accelerate air circulation within the panel and save on return air costs.

[0027] In some embodiments, the central portion of the main return air duct 18 is provided with a... Figure 2 As shown, the gas entering through the purification tank 17 and then flowing out through the main return air duct 18 is purified before exiting through the main return air duct 18. The purification tank 17 can purify the toxic, harmful, high-temperature, and irritating gases generated in the multifunctional chamber 6, reduce the gas temperature, decrease the content of harmful gases, and absorb a large amount of dust in the polluted air 16.

[0028] like Figure 2 As shown, in some embodiments, the bottom of the purification water tank 17 has a first inclined surface near the input end and a second inclined surface near the output end. The slope and gradient of the first inclined surface are both smaller than those of the second inclined surface. The purification water tank 17 is always full of water. A flip-type protective net is installed above the tank. The width of the tank is smaller than the width of the alleyway to facilitate the passage of mechanical equipment. The front and rear inlets of the tank have different slopes. One side has a smaller slope to facilitate the cleaning of silt by mechanical equipment, while the other side has a larger slope and a small retaining wall is constructed to facilitate the settling of dust in the polluted airflow 16. In some embodiments, a toxic gas detection sensor 15 is installed at the end of the second return air roadway 11. In the event of a disaster or abnormal gas generation in the multi-functional chamber 6, the various toxic gas detection sensors 15 can transmit abnormal values ​​to the mine surface control room in a timely manner, enabling remote control of the auxiliary fan 14 and main fan 20 to operate at high frequency, facilitating the rapid discharge of toxic, harmful, high-temperature, and irritating gases from the mine. Dust sensors, temperature sensors, and wind speed sensors can also be installed in the roadway as needed for detecting dust, temperature, and wind speed within the roadway.

[0029] See Figure 1 As shown, in a specific implementation, when a fire occurs in the multi-functional chamber 6, smoke and dust pass through the first return air shaft 7 to the first return air tunnel 13. The toxic gas detection sensor 15 transmits abnormal values ​​to the dispatch room for alarm. Through manual control by dispatch personnel or automatic operation by ventilation software, the automatic air door 4 is closed to prevent the continuous entry of fresh airflow 2 from escalating and spreading the fire. The automatic fire extinguishing device installed inside the multi-functional chamber 6 is activated to extinguish the fire. The frequency of the auxiliary fan 14 and the surface main fan 20 is increased to facilitate the faster discharge of toxic, harmful, irritating, high-temperature gases and dust generated in the multi-functional chamber 6. When the multi-functional chamber 6 produces toxic, harmful, irritating, and high-temperature gases, they eventually flow into the main return air duct 18. The gases can be cooled by the purification water tank 17, some of the toxic and harmful gases dissolve in the water, and dust is adsorbed. This invention also proposes an embodiment of a method for independent ventilation of a multi-functional underground mine chamber, using any of the structures described in the above embodiments for independent ventilation of a multi-functional underground mine chamber, comprising the following steps: S1. By controlling the automatic opening of the automatic auxiliary air door 5, the air is input into the multi-functional chamber 6 through the first air intake roadway 1 for ventilation in the multi-functional chamber 6. The air introduced into the multi-functional chamber 6 is drawn away through the first return air shaft 7, the second return air roadway 11 and the auxiliary fan 14, keeping the air circulation direction from the input end to the output end of the multi-functional chamber 6. S2. The air output from the auxiliary fan 14 to the main return air duct 18 passes through the main return air duct 18, the second return air shaft 19 and the main fan 20 in sequence, and is discharged to the ground after maintaining the airflow direction.

[0030] This invention features a simple structure and can be widely applied in underground operations. It allows for remote and effective control of the airflow and velocity in the multi-functional chamber 6. In the event of a disaster or abnormal gas generation in the multi-functional chamber 6, this invention can react rapidly by remotely closing the automatic ventilation door 4 with its ventilation window, preventing toxic, harmful, high-temperature, and irritating gases from mixing into other ventilation roadways and affecting normal ventilation in other areas of the mine. This is a significant advantage over existing technologies, which may suffer from problems such as disaster spread and delayed control. The various sensors installed in this invention can upload gas indicators from the multi-functional chamber 6 to the surface control room in real time, enabling ground personnel to promptly grasp the gas conditions inside the chamber and provide accurate information for taking appropriate measures. Existing technologies may lack such timely and comprehensive monitoring methods. The purification water tank 17 in this invention not only purifies the toxic, harmful, high-temperature, and irritating gases generated in the multi-functional chamber 6, reducing gas temperature and harmful gas content, and absorbing a large amount of dust in the polluted air 16, but its special design, such as always being full of water, installing a flip-type protective net, and providing sufficient width for mechanical equipment to pass through, also facilitates daily maintenance and cleaning, improving equipment efficiency and lifespan—something difficult to achieve with existing technologies. Through its overall structural design and supporting implementation methods, this invention forms an independent ventilation system specifically designed for underground mines, effectively solving the ventilation problems of various functional chambers underground, providing reliable technical support and guarantees for safe mine production, and offering higher practicality and economic benefits compared to existing technologies.

[0031] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A structure for independent ventilation in a multi-functional underground mine chamber, characterized in that, The system includes a first air intake tunnel (1), an automatic auxiliary air door (5), a multi-functional chamber (6), a first return air trolley, a first return air shaft (7), a second return air tunnel (11), an auxiliary fan (14), a main return air duct (18), a second return air shaft (19), and a main fan (20) connected in sequence. The multi-functional chamber (6) controls whether air flows into the multi-functional chamber (6) through the automatic auxiliary air door (5). The multi-functional chamber (6) draws indoor air out to the first return air shaft (7) through the first return air trolley, and draws it into the main return air duct (18) through the auxiliary fan (14) connected to the second return air tunnel (11). The main return air duct (18) draws the air in the main return air duct (18) to the ground through the second return air shaft (19) and the main fan (20) on the second return air shaft (19).

2. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 1, characterized in that, The input and output terminals of the multifunctional chamber (6) are connected in parallel to a third air intake channel (21), and an auxiliary air door (5) is provided on the third air intake channel (21). The auxiliary air door (5) is used to open and close the third air intake channel (21).

3. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 1, characterized in that, The first air intake roadway (1) has multiple second air intake roadways (3) connected in parallel in the middle. The multiple second air intake roadways (3) are used to introduce air into the ventilation roadways around the panel area. The ventilation roadways are connected in sequence to the third return air shaft (10), the second return air roadway (11) and the third return air roadway (12).

4. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 3, characterized in that, The ventilation tunnels include a first ventilation tunnel (8) and a second ventilation tunnel (9) connected end to end.

5. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 3, characterized in that, The third return airway (12) is connected to the input end of the main return airway (18).

6. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 1, characterized in that, A purification water tank (17) is provided in the middle of the main return air duct (18). The gas input into the main return air duct (18) is purified by the purification water tank (17) and flows out to the output end of the main return air duct (18).

7. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 6, characterized in that, The bottom of the purification pool (17) has a first inclined surface near the input end and a second inclined surface near the output end. The slope height and slope of the first inclined surface are both smaller than those of the second inclined surface.

8. The structure for independent ventilation of a multi-functional underground mine chamber according to claim 1, characterized in that, A toxic gas detection sensor (15) is installed at the end of the second return airway (11).

9. A method for independent ventilation of a multi-functional chamber in an underground mine, characterized in that, The independent ventilation structure of a multi-functional underground mine chamber (6) according to any one of claims 1-8 includes the following steps: By controlling the automatic opening of the automatic auxiliary air door (5), the air is input into the multi-functional chamber (6) through the first air intake roadway (1) for ventilation in the multi-functional chamber (6). The air introduced into the multi-functional chamber (6) is drawn away through the first return air shaft (7), the second return air roadway (11) and the auxiliary fan (14), keeping the air circulation direction from the input end to the output end of the multi-functional chamber (6). The air output from the auxiliary fan (14) into the main return air duct (18) passes through the main return air duct (18), the second return air shaft (19) and the main fan (20) in sequence, and is then discharged to the ground after maintaining the airflow direction.

10. A method for independent ventilation of a multi-functional underground mine chamber according to claim 9, characterized in that, By connecting the third air intake roadway (21) in parallel at the input and output terminals of the multifunctional chamber (6), and opening the third air intake roadway (21) through the auxiliary air door (5), the underground air circulation of the multifunctional chamber (6) is realized.

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