Top cutting blasting CO instantaneous collecting and eliminating system

Abstract

The utility model provides a top cutting blasting CO instantaneous collecting and eliminating system which comprises an energy gathering pipe and an energy gathering pipe CO eliminating agent placed in the energy gathering pipe. A water curtain pipe; a CO eliminating agent spraying device; a CO instantaneous collection and elimination device; a CO monitoring device; during blasting, the energy gathering pipe CO eliminating agent can perform in-situ elimination on part of CO; the rest CO passes through the water curtain pipe and the CO eliminating agent spraying device, and is collected and released in the CO instantaneous collecting and eliminating device; the CO monitoring device monitors the release concentration of the gas treated by the CO instantaneous collecting and eliminating device, and it is guaranteed that the concentration of harmful gas in the roadway is within a safe range. According to the system, CO generated after energy-gathered top cutting blasting in the gob-side entry retaining project can be reduced to a safe range, it is guaranteed that the CO concentration in a roadway does not exceed the limit after blasting, monitoring and early warning can be conducted on the CO concentration in the roadway in real time, and potential safety hazards of workers are greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of goaf retention engineering technology, and specifically relates to a system for instantaneous collection and elimination of CO during roof cutting blasting. Background Technology

[0002] The "110 Method," an innovative pillarless mining technology in China's coal mining industry, achieves multiple goals—increasing resource recovery rate, reducing mining costs, and protecting the ecological environment—through a technical system of "single working face, single roadway, and zero coal pillars." One of its core technologies, the shaped charge roof-cutting blasting process, utilizes shaped charge tubes to directionally guide the release of explosive energy, causing precise fracturing of the roof rock along a predetermined direction. This significantly optimizes the roadway support structure and reduces the random destructive effects of traditional blasting. However, this technology faces severe challenges in practical applications due to the complexity of geological conditions. When blasting is carried out in environments with thick coal seams and concentrated explosive charges, variations in geological structure and differences in explosive charge placement can easily lead to excessive carbon monoxide (CO) concentrations during the blasting reaction. The abnormal accumulation of this toxic gas in a confined mine environment not only directly threatens the lives of underground workers—causing acute poisoning or even asphyxiation—but can also lead to a chain reaction of gas explosions, resulting in catastrophic mining accidents. Meanwhile, mandatory shutdowns and evacuations triggered by excessive CO levels will severely disrupt production plans and cause significant economic losses. Furthermore, subsequent gas treatment and equipment maintenance will substantially increase environmental governance costs. Therefore, overcoming the technical bottleneck of CO exceeding limits under complex geological conditions through precise blasting parameter control and intelligent monitoring and early warning system optimization has become a key issue in ensuring the safe and efficient promotion and application of the "110 method."

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] To address the above issues, a system for the instantaneous collection and elimination of CO during roof-cutting blasting has been invented. This system is specifically designed for the intensive and instantaneous collection and elimination of CO generated during shaped charge roof-cutting blasting in gob-side roadway retention projects, utilizing the physical and chemical processes involved. This device can reduce the CO generated after shaped charge roof-cutting blasting in gob-side roadway retention projects to a safe range, eliminating the safety hazards caused by excessive CO levels and meeting blasting requirements. It ensures that the CO concentration in the roadway does not exceed the limit after blasting and can monitor and provide early warning of CO concentration in the roadway in real time, significantly reducing safety hazards for workers.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] This application provides a system for the instantaneous collection and elimination of CO from roof-cutting explosions, the improvement of which is that the system includes:

[0007] A focusing tube 13 includes a tubular structure; the focusing tube 13 is disposed within the blast hole 1 in the blasting zone; a CO eliminator is placed inside the focusing tube 13.

[0008] Water curtain pipe 3 is installed 2-5 meters away from the blasting area and fixed to the top of the tunnel; one water curtain pipe 3 is installed on each side of the blasting area;

[0009] CO eliminator spraying device 4 is installed 2-5 meters away from the blasting area and fixed on the top of the roadway; one CO eliminator spraying device 4 is installed on each side of the blasting area;

[0010] The instantaneous CO collection and elimination device 5 is installed 3-5 meters away from the blasting area and fixed to the roadway floor; one of the instantaneous CO collection and elimination devices 5 is installed on the downwind side of the blasting area; the screen 20 of the instantaneous CO collection and elimination device 5 faces the airflow direction 6;

[0011] CO monitoring device 19 is installed 30 meters away from the blasting area and fixed on the top of the tunnel; one CO monitoring device 19 is installed on each side of the blasting area;

[0012] During blasting, the CO eliminator in the focused tube can eliminate some of the CO in situ; the remaining CO is collected and released in the instantaneous CO collection and elimination device 5 after passing through the water curtain pipe 3 and the CO eliminator spraying device 4; the CO monitoring device 19 monitors the concentration of gas released after being processed by the instantaneous CO collection and elimination device 5 to ensure that the concentration of harmful gases in the roadway is within a safe range.

[0013] Preferably, the emulsion explosive 16 encapsulates the CO eliminator in the shaped charge tube; the emulsion explosive 16 and the CO eliminator in the shaped charge tube are simultaneously filled into the interior of the shaped charge tube 13.

[0014] Preferably, the water curtain pipe 3 includes: a water pipe and a nozzle; the water pipe is fixed to the top of the tunnel; the first end of the water pipe is connected to an external water source; and the second end of the water pipe is connected to the nozzle.

[0015] Preferably, the CO eliminator spraying device 4 includes: a fan, a receiving chamber, and a nozzle connected in sequence by an air duct; the receiving chamber is used to store the CO eliminator of the spraying device; the nozzle is the outlet of the CO eliminator of the spraying device; the fan sprays the CO eliminator of the spraying device from the receiving chamber through the air duct from the nozzle.

[0016] Preferably, the CO instantaneous collection and elimination device 5 includes:

[0017] Base 10 is installed on the tunnel floor slab;

[0018] A collection cylinder 8 is disposed on the base 10; a negative pressure system is provided inside the collection cylinder 8.

[0019] The CO eliminator curtain 7 is a plate-shaped object; one side of the CO eliminator curtain 7 is connected to the first end of the collection cylinder 8.

[0020] The screen 20 is a mesh; the screen 20 is connected to the other side of the CO eliminator curtain plate 7.

[0021] The CO2 outlet is connected to the second end of the collection cylinder 8; a flexible gas membrane is provided at the CO2 outlet for gas collection.

[0022] Preferably, the negative pressure system includes: a sealed cylinder; the sealed cylinder is made of metal or high-strength plastic; a vacuum pump, a fan or a solenoid valve is installed inside the sealed cylinder; the air inside the collection cylinder 8 is extracted by electric drive, so that the air pressure inside the collection cylinder 8 is reduced to be lower than the external atmospheric pressure, thereby forming a pressure difference.

[0023] Preferably, the CO eliminator panel 7 includes: four layers of panels 15 coated with CO eliminator particles; the four panels 15 are connected as one unit by bolts.

[0024] Preferably, the CO monitoring device 19 includes: a sensor module, a signal processing module, and an alarm module;

[0025] The sensor module includes: an electrochemical sensor for toxic and harmful gases;

[0026] The signal processing module includes a microprocessor;

[0027] The alarm module includes a light-emitting element and a sound-emitting element.

[0028] Compared with the closest prior art, the technical solution of this application has the following beneficial effects:

[0029] 1. Multi-level collaborative processing significantly improves efficiency.

[0030] In-situ elimination within the borehole: CO eliminator is integrated with the explosive and actively diffused by the explosion shock wave to achieve simultaneous elimination of CO generation (field tests have shown an elimination rate of 80%), overcoming the lag of traditional passive post-blasting treatment.

[0031] Secondary external interception: By combining water curtain dust suppression with the spraying of eliminator, the 20% of CO that has escaped is chemically converted (e.g., CO→CO2), while inhibiting the spread of dust, thus achieving the dual function of "dust suppression + CO removal".

[0032] Physical-chemical composite treatment: The collection device adopts a double-layer curtain plate design (fine screen to filter particulate matter + multi-layer eliminator chemical conversion) to avoid clogging and increase the reaction contact area, further reducing residual CO.

[0033] 2. High negative pressure instantaneous collection to prevent gas diffusion.

[0034] Negative pressure driven rapid recovery: The device has a built-in negative pressure system that actively draws in blast fumes and CO at the moment of blasting. Compared with traditional methods that rely on natural ventilation or mechanical exhaust, this significantly shortens the residence time of harmful gases and reduces the risk of CO accumulation in the tunnel.

[0035] Storage buffer and controlled release: The CO instantaneous collection and elimination device is equipped with a large-capacity storage device at the back end, which is combined with the return air system for quantitative release, avoiding the concentration exceeding the standard due to one-time emission and solving the compliance problem of traditional direct emission methods.

[0036] 3. Real-time monitoring and dynamic control enhance security.

[0037] Online monitoring system: CO concentration and pressure sensors are deployed 30m from the blasting point to achieve real-time data feedback. The system can dynamically adjust the operating parameters of the collection device or activate emergency measures to form a closed-loop safety management system.

[0038] Preventative release mechanism: Regularly and quantitatively release the converted gas (such as CO2), and combine monitoring data to predict risks. This is more proactive than traditional post-event handling and effectively prevents CO concentration exceeding the limit.

[0039] 4. Structural integration and engineering applicability.

[0040] Modular design: Components such as eliminator packs, collection devices, and storage units can be installed in a modular manner to adapt to different tunnel environments and blasting scales, making it more flexible than fixed systems.

[0041] Cost-effectiveness optimization: The pore-filled eliminator utilizes explosive energy to spontaneously diffuse, reducing additional energy consumption; the multi-layered panel structure extends the service life of the agent and reduces maintenance frequency, making the overall cost superior to single chemical treatment or pure physical adsorption solutions.

[0042] Through a full-chain innovation of "in-situ elimination - immediate interception - negative pressure recovery - intelligent management and control", a closed-loop solution for CO control in blasting scenarios has been constructed, which significantly surpasses traditional methods in terms of technology integration and comprehensive efficiency. Attached Figure Description

[0043] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0044] Figure 1This is a schematic diagram of the instantaneous CO collection and elimination system for roof-cutting blasting involved in this application;

[0045] Figure 2 This is a schematic diagram of the energy-concentrating tube arrangement involved in this application;

[0046] Figure 3 This is a schematic diagram of the CO instantaneous collection and elimination device involved in this application;

[0047] Figure 4 This is a schematic diagram of the CO eliminator curtain structure involved in this application;

[0048] Figure 5 This is a flowchart illustrating the intensive instantaneous collection and elimination of CO from the physical-chemical processes involved in the roof-cutting blasting described in this application.

[0049] Among them, 1. blasting hole; 2. CO diffusion direction; 3. water curtain pipe; 4. CO eliminator spraying device; 5. CO instantaneous collection and elimination device; 6. airflow direction; 19. CO monitoring equipment; 20. screen; 7. CO eliminator curtain plate; 8. collection cylinder; 9. CO2 outlet; 10. base; 11. yellow mud; 12. water-bubbling mud; 13. shaped charge tube; 14. shaped charge hole; 15. plate; 16. emulsion explosive; 17. detonator lead wire; 18. electronic detonator. Detailed Implementation

[0050] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0051] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0053] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0054] Before providing a further detailed description of the embodiments of this disclosure, the nouns and terms involved in the embodiments of this disclosure will be explained, and the nouns and terms involved in the embodiments of this utility model shall be interpreted as follows.

[0055] An improvement of a roof-cutting blast CO instantaneous collection and elimination system is that, for example... Figure 1 As shown, the system includes: a focusing tube 13, a water curtain tube 3, a CO eliminator spraying device 4, a CO monitoring device 19, and a CO instantaneous collection and elimination device 5.

[0056] A shaped charge tube 13, comprising a tubular structure, is disposed within a blast hole 1 in the blasting zone; a CO eliminator is placed inside the shaped charge tube 13. All CO eliminators involved in this application are made of CuO. Preferably, an emulsion explosive 16 encapsulates the CO eliminator in the shaped charge tube; the emulsion explosive 16 and the CO eliminator are simultaneously filled into the interior of the shaped charge tube 13. Specifically, as follows... Figure 2 As shown, multiple shaped charge tubes 13 are sequentially installed end-to-end inside the blast hole. The blast hole is sealed with alternating layers of yellow mud 11 and water-soaked mud 12. Multiple shaped charge tubes 13 fill one blast hole. Multiple parallel blast holes are set in the blasting area.

[0057] The shaped charge tube 13 is a tubular structure with a diameter matching the inner diameter of the blast hole. Multiple through holes, serving as shaped charge holes 14, are evenly distributed along the axial direction of the shaped charge tube 13. The CO scavenger package used in the shaped charge tube is 250mm long and is fixed within a 300mm long emulsion explosive 16, then filled into the shaped charge tube along with the emulsion explosive. An electronic detonator 18 is embedded at the end of the emulsion explosive in each shaped charge tube. Detonator leads 17 pass through all electronic detonators 18, thus connecting all shaped charge tubes 13 in series. Simultaneously, the detonator leads 17 act as explosive leads, passing through the water-soaked mud 12 and yellow mud 11, extending out to the blast hole. During blasting, the blast shock wave acts as the driving force, rupturing the scavenger package and causing the CO scavenger from the shaped charge tube to diffuse within the blast hole, achieving in-situ synchronous CO scavenging. In-situ synchronous scavenging can achieve a maximum scavenging rate of 80%. The CO that could not be eliminated in situ spread to both sides of the blasting area along the CO diffusion direction 2.

[0058] A water curtain pipe 3 is installed 2-5 meters outside the blasting area, fixed to the top of the tunnel, with one water curtain pipe 3 installed on each side of the blasting area for dust suppression. Specifically, the water curtain pipe 3 includes a water pipe and nozzles. During dust suppression, pressurized water is delivered to the nozzles through the water pipes, and the water is dispersed into a fine mist by the nozzles, forming a water curtain barrier with a certain coverage area. The water mist, through contact, adsorption, and agglomeration with the dust particles, causes the dust particles to become heavier and settle, thereby achieving the purpose of dust suppression. The water pipes are fixed to the top of the tunnel and connected to an external water source (such as a water tank or pipe network). Pressure is provided for the water flow by a water pump or gravity, allowing the water to be transported along the pipes to the nozzle locations.

[0059] The CO eliminator spraying device 4 is installed 2-5 meters outside the blasting area, with one device on each side of the blasting area. Specifically, the CO eliminator spraying device 4 includes (not shown) a fan, a receiving chamber, and a nozzle connected in sequence by air ducts. The receiving chamber stores the CO eliminator; the nozzle can be considered the outlet for the CO eliminator; the fan sprays the CO eliminator from the receiving chamber through the air ducts. Simultaneously, the CO eliminator spraying device 4 interacts with the water curtain pipe 3 to achieve the effect of atomizing the CO eliminator.

[0060] The instantaneous CO collection and elimination device 5 is set 3-5 meters away from the blasting area, and one of the instantaneous CO collection and elimination devices 5 is set on one side of the blasting area.

[0061] Among them, the CO instantaneous collection and elimination device 5, such as Figure 3 As shown, it includes:

[0062] The base 10 is installed on the floor of the tunnel. The material and shape of the base 10 are not limited, as long as it can serve to fix the instantaneous CO collection and elimination device 5.

[0063] A collection cylinder 8 is fixedly mounted on the base 10; a negative pressure system is installed inside the collection cylinder 8. Preferably, the collection cylinder 8 is fixed to the base 10 by bolts. Specifically, bolt holes are provided at the contact positions between the base 10 and the collection cylinder 8, and the collection cylinder 8 is bolted to the base 10. The negative pressure system includes a vacuum pump, a fan, etc., which continuously draws air from the collection cylinder 8, creating a pressure difference and thus forming a negative pressure inside the collection cylinder 8. Specifically, the main body of the negative pressure system is a sealed cylinder, usually made of metal or high-strength plastic to ensure airtightness, and has a built-in vacuum pump, fan, or solenoid valve, driven by electricity to draw air. The negative pressure value inside the cylinder is displayed in real time for easy monitoring. The vacuum pump, fan, and other equipment draw air out of the collection cylinder 8, reducing the internal air pressure to below the external atmospheric pressure, thus creating a pressure difference. Due to the existence of this pressure difference, external CO flows into the collection cylinder 8, while the air inside the collection cylinder 8 is expelled, thereby achieving the function of actively drawing in and collecting blast fumes and CO at the moment of explosion. Compared to traditional methods that rely on natural ventilation or mechanical exhaust, this method significantly shortens the residence time of harmful gases and reduces the risk of CO accumulation in the tunnel.

[0064] The CO eliminator curtain 7 is a plate-shaped object; one side of the CO eliminator curtain 7 is connected to the first end of the collection cylinder 8. The method of fixing the CO eliminator curtain 7 to the collection cylinder 8 is not limited. Preferably, the CO eliminator curtain 7 is fixed to the collection cylinder 8 by bolts through a frustum-shaped cover. The frustum-shaped cover is preferably a cover made of thin metal sheet. The size of the bottom surface of the frustum-shaped cover corresponds to the size of the CO eliminator curtain 7; bolt holes are provided at the contact position between the bottom edge of the frustum-shaped cover and the CO eliminator curtain 7, and bolts are used to fix the bottom surface of the frustum-shaped cover to the CO eliminator curtain 7. The size of the top surface of the frustum-shaped cover corresponds to the inlet size of the collection cylinder 8; bolt holes are provided at the contact position between the top edge of the frustum-shaped cover and the inlet of the collection cylinder 8, and bolts are used to fix the top surface of the frustum-shaped cover to the collection cylinder 8. Wherein, the CO eliminator curtain 7 is as follows... Figure 4 As shown, it includes: four plates 15 coated with CO eliminator particles; the four plates 15 are connected as one piece by bolts.

[0065] The screen 20 is a mesh-like material; the screen 20 is connected to the other side of the CO eliminator panel 7; the screen 20 is used to filter large solid particles and impurities. Preferably, the screen 20 and the CO eliminator panel 7 are fixedly connected by bolts. The size of the screen 20 corresponds to the size of the CO eliminator panel 7, and the bolt holes are preferably arranged at the edge where the screen 20 and the CO eliminator panel 7 connect, so as not to affect CO elimination.

[0066] Specifically, a screen 20 and a CO eliminator curtain 7 are provided at the front end of the collection cylinder 8. The screen 20 needs to be set facing the airflow direction 6, so that particles and impurities are more easily adsorbed on the screen 20 when they are in the direction of airflow 6. The screen 20 is a fine screen, set away from the collection cylinder 8, and its main function is to filter large solid particles and impurities and adsorb small solid particles; the CO eliminator curtain 7 is made of CO eliminator particles, set close to the collection cylinder 8, and its main function is to eliminate CO and convert it into CO2.

[0067] The CO2 outlet is connected to the second end of the collection cylinder 8. After CO2 is collected, it is discharged through the CO2 outlet 9. To prevent the gas concentration from exceeding the limit, a flexible gas membrane for gas collection is installed at the CO2 outlet as a large-capacity storage device. CO2 discharge can be controlled and limited by the CO monitoring device 19. Alternatively, the CO2 outlet can be directly connected to the ventilation duct cloth, and the gas can be discharged into the return airflow of the roadway controlled by the CO monitoring device 19. The flexible gas membrane is a flexible thin film material mainly used for gas collection, separation, and storage.

[0068] The instantaneous CO collection and elimination system for roof-cutting blasting also includes CO monitoring devices 19, installed 30 meters away from the blasting area, with one CO monitoring device 19 installed on each side of the blasting area. Specifically, the CO monitoring device 19 employs a multi-parameter gas detection alarm, the core components of which include a sensor module, a signal processing module, and an alarm module. The sensor module used in this application is an electrochemical sensor for toxic and harmful gases: it generates current through the oxidation-reduction reaction of gas on electrodes, and the magnitude of the current is directly proportional to the gas concentration. A larger current indicates a higher concentration of harmful gas.

[0069] The signal processing module includes a microprocessor, which receives the electrical signals output from the sensor module, amplifies, filters, and performs analog-to-digital conversion (A / D conversion), and calculates the concentration of harmful gases using a preset algorithm. It can also perform calibration, compensate for interference from environmental factors such as temperature and humidity on the detection results, and control the overall operation of the device.

[0070] The alarm module includes a light-emitting element (high-brightness LED) and a sound-emitting element (buzzer or speaker). The light-emitting element is clearly visible in low-light environments. The sound-emitting element can emit a high-decibel alarm sound (typically ≥80dB).

[0071] When a multi-parameter gas detector alarm detects harmful gases, the sensor module first converts the gas concentration into an electrical signal. After processing and analysis by the signal processing module, the signal is compared with a preset alarm threshold. If the concentration of harmful gases exceeds the limit, the alarm module will sound an alarm through sound and light, and some models can also transmit data remotely to achieve real-time monitoring and safety warnings.

[0072] During the blast, the CO eliminator in the focusing tube can eliminate some of the CO in situ; the remaining CO is collected and released in the instantaneous CO collection and elimination device 5 after passing through the water curtain pipe 3 and the CO eliminator spraying device 4; the CO monitoring device 19 controls the CO2 release concentration of the instantaneous CO collection and elimination device 5 to ensure that the CO2 concentration is within a safe range.

[0073] like Figure 5 As shown, the CO instantaneous collection and elimination method applied to the CO instantaneous collection and elimination system of the roof-cutting blasting in this application includes the following steps:

[0074] Step S1, in-hole elimination. During loading, the CO eliminator pack in the shaped charge tube is fixed in the same position as the explosive and filled into the shaped charge tube. Utilizing the blast shock wave as the driving force, the eliminator actively diffuses the explosive. The rupture of the eliminator pack causes the CO eliminator in the shaped charge tube to diffuse throughout the blast hole, achieving simultaneous elimination of CO generation within the hole—also known as in-situ CO elimination. Field tests have shown that up to 80% of the CO in the hole can be eliminated. However, about 20% of the CO will still leak out through adjacent holes or cracks, spreading along the CO diffusion direction 2 towards both sides of the blast area. In this case, external collection and elimination are still necessary.

[0075] Step S2, secondary interception outside the borehole. During blasting, the water curtain and CO eliminator spraying devices are activated to achieve dust suppression and external dust removal. By combining water curtain dust suppression with eliminator spraying, the emitted 20% CO is chemically converted (e.g., CO→CO2), while simultaneously inhibiting dust diffusion, achieving the dual function of "dust suppression + CO removal".

[0076] Specifically, the working principle of underground CO eliminators is mainly based on chemical adsorption, catalytic oxidation, or redox reactions, which convert CO into harmless substances or reduce its concentration by reacting with it. When CuO is used to eliminate CO after coal mine blasting, it is mainly achieved through redox reactions at high temperatures (CuO + CO → Cu + CO2) or catalytic oxidation reactions (requiring O2).

[0077] Meanwhile, CuO in the scavenging agent can also act as a catalyst (rather than a reactant), thus lowering the activation energy of the reaction between CO and oxygen, promoting the oxidation of CO to CO2 in an aerobic environment. The activation of the ventilation system after coal mine blasting introduces oxygen, providing conditions for the catalytic reaction: 2CO + O2 → 2CO2.

[0078] Step S3, physical-chemical combined treatment. The instantaneous CO collection and elimination device 5 adopts a design of screen 20 and CO elimination agent curtain plate 7 (fine screen filters particulate matter + multi-layer CO elimination agent particles chemically convert), which avoids clogging and increases the reaction contact area, further reducing residual CO.

[0079] Step S4, Negative Pressure Instantaneous Collection. Negative pressure-driven rapid recovery: The CO instantaneous collection and elimination device 5 has a built-in negative pressure system that actively draws in blast fumes, CO, and converted CO2 at the moment of blasting, preventing gas diffusion. Compared to traditional methods relying on natural ventilation or mechanical exhaust, this significantly shortens the residence time of harmful gases and reduces the risk of CO accumulation in the tunnel.

[0080] Step S5, storage buffer. The rear end of the CO instantaneous collection and elimination device 5 is equipped with a large-capacity storage device, such as a flexible gas membrane for gas collection, to collect fumes, CO, and converted gases (CO2). Alternatively, the rear end of the CO instantaneous collection and elimination device 5 can be directly connected to the return air duct cloth, through which the gas is discharged to the ground.

[0081] Step S6, Controlled Release. In conjunction with the tunnel's existing return air system, the large-capacity storage device periodically and quantitatively releases the collected CO2 gas into the return air system. This avoids excessive concentrations caused by single-time emissions. By releasing small amounts at set times multiple times, the CO2 concentration emitted into the tunnel is ensured to remain within limits, thus resolving the compliance issues of traditional direct discharge methods.

[0082] Step S7, Real-time Monitoring. Install CO monitoring equipment 19, or CO gas concentration and pressure measurement and monitoring instruments, at a distance of 30m from the blasting area to achieve real-time online monitoring and data feedback. This allows for dynamic adjustment of the collection device's operating parameters or activation of emergency measures, forming a closed-loop safety management system to ensure safety.

[0083] Preventative release mechanism: Regularly and quantitatively release the converted gas (such as CO2), and combine monitoring data to predict risks. This is more proactive than traditional post-event handling and effectively prevents CO concentration exceeding the limit.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A system for instantaneous collection and elimination of CO from roof-cutting blasting, characterized in that, The system includes: A focusing tube (13) includes a tubular structure; the focusing tube (13) is disposed in the blast hole (1) of the blasting area; a focusing tube CO eliminator is placed inside the focusing tube (13); A water curtain pipe (3) is installed 2-5 meters away from the blasting area and fixed to the top of the tunnel; one water curtain pipe (3) is installed on each side of the blasting area. The CO eliminator spraying device (4) is set up 2-5 meters away from the blasting area and fixed on the top of the roadway; one of the CO eliminator spraying devices (4) is set up on each side of the blasting area. The instantaneous CO collection and elimination device (5) is set up 3-5 meters away from the blasting area and fixed on the roadway floor; one of the instantaneous CO collection and elimination devices (5) is set up on the downwind side of the blasting area; the screen (20) of the instantaneous CO collection and elimination device (5) faces the airflow direction (6). CO monitoring device (19) is installed 30 meters away from the blasting area and fixed on the top of the roadway; one CO monitoring device (19) is installed on each side of the blasting area. During blasting, the CO eliminator in the focusing tube can eliminate some of the CO in situ; the remaining CO is collected and released in the instantaneous CO collection and elimination device (5) after passing through the water curtain pipe (3) and the CO eliminator spraying device (4); the CO monitoring device (19) monitors the concentration of gas released after being treated by the instantaneous CO collection and elimination device (5) to ensure that the concentration of harmful gases in the roadway is within a safe range.

2. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 1, characterized in that, The emulsion explosive (16) encapsulates the CO eliminator in the shaped charge tube; the emulsion explosive (16) and the CO eliminator in the shaped charge tube are simultaneously filled into the interior of the shaped charge tube (13).

3. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 1, characterized in that, The water curtain pipe (3) includes: a water pipe and a nozzle; the water pipe is fixed to the top of the tunnel; the first end of the water pipe is connected to an external water source; and the second end of the water pipe is connected to the nozzle.

4. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 1, characterized in that, The CO eliminator spraying device (4) includes: a fan, a receiving chamber and a nozzle connected in sequence by an air duct; the receiving chamber is used to store the CO eliminator of the spraying device; the nozzle is the outlet of the CO eliminator of the spraying device; the fan sprays the CO eliminator of the spraying device from the receiving chamber through the air duct from the nozzle.

5. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 1, characterized in that, The instantaneous CO collection and elimination device (5) includes: The base (10) is set on the bottom plate of the tunnel; A collection cylinder (8) is provided on the base (10); a negative pressure system is provided inside the collection cylinder (8); The CO eliminator curtain (7) is a plate-shaped object; one side of the CO eliminator curtain (7) is connected to the first end of the collection cylinder (8); The screen (20) is a mesh; the screen (20) is connected to the other side of the CO eliminator curtain plate (7); The CO2 outlet is connected to the second end of the collection cylinder (8); a flexible gas membrane is provided at the CO2 outlet for gas collection.

6. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 5, characterized in that, The negative pressure system includes: a sealed cylinder; the sealed cylinder is made of metal or high-strength plastic; a vacuum pump, a fan or a solenoid valve is installed inside the sealed cylinder; the air inside the collection cylinder (8) is extracted by electric drive, so that the air pressure inside the collection cylinder (8) is reduced to be lower than the external atmospheric pressure, thereby forming a pressure difference.

7. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 5, characterized in that, The CO eliminator panel (7) includes: four panels (15) coated with CO eliminator particles; the four panels (15) are connected as one unit by bolts.

8. The instantaneous CO collection and elimination system for roof-cutting blasting as described in claim 1, characterized in that, The CO monitoring device (19) includes: a sensor module, a signal processing module, and an alarm module; The sensor module includes: an electrochemical sensor for toxic and harmful gases; The signal processing module includes a microprocessor; The alarm module includes a light-emitting element and a sound-emitting element.

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