CN114811404B - Device for storing carbon dioxide underground coal mine in portable mode and application method of device - Google Patents

Device for storing carbon dioxide underground coal mine in portable mode and application method of device Download PDF

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Publication number
CN114811404B
CN114811404B CN202210348126.2A CN202210348126A CN114811404B CN 114811404 B CN114811404 B CN 114811404B CN 202210348126 A CN202210348126 A CN 202210348126A CN 114811404 B CN114811404 B CN 114811404B
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Prior art keywords
cavity
carbon dioxide
working
main body
goaf
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CN114811404A (en
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张春华
吴鑫
陈金全
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Liaoning Technical University
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Liaoning Technical University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/08—Integral reinforcements, e.g. ribs
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/06—Closures, e.g. cap, breakable member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/084—Mounting arrangements for vessels for small-sized storage vessels, e.g. compressed gas cylinders or bottles, disposable gas vessels, vessels adapted for automotive use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0678—Concrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0311—Closure means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/219—Working processes for non metal materials, e.g. extruding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0138—Single phase solid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion

Abstract

The invention provides a device for storing carbon dioxide in a coal mine underground portable manner, which comprises a cavity, wherein a semi-closed hollow cavity is arranged in the cavity, a charging port is formed in the top end of the cavity, a sealing film is fixed in the hollow cavity of the cavity, a sealing cover is arranged at the charging port, and the sealing cover and the cavity are fixed in an auxiliary manner through a cylindrical pin. When the working main body is used for building the auxiliary sealing wall at the inner side of the roof-cutting entry retaining or the fireproof sealing wall of the U-shaped ventilation working face and filling the goaf, the air leakage channel of the goaf behind the working face frame can be reduced, and the working main body can be used for effectively storing carbon dioxide during stoping of the working face; after the working main body finishes the stoping of the working face, the working main body is totally reserved in a closed goaf, and is partially broken under the actions of roof caving and groundwater, solid carbon dioxide in the working main body leaks, and formed gaseous carbon dioxide can inert coal remaining in the goaf and is used for fire prevention and fire extinguishing.

Description

Device for storing carbon dioxide underground coal mine in portable mode and application method of device
Technical Field
The invention belongs to the technical field of underground carbon dioxide storage, and particularly relates to a device for portable underground carbon dioxide storage of a coal mine and a use method thereof.
Background
The coal gangue is waste residue generated in the process of mining and processing coal, which is about 12% of the yield of the coal, and the coal gangue pile is located near the coal mine, occupies civilian lands, cultivated lands, woodlands and the like, and wastes homeland resources; in addition, the coal gangue is laid for a long time, so that the image of a coal mine mining area is damaged to a great extent, and a large amount of mineral elements contained in the coal gangue can infiltrate into soil to pollute the soil, so that a technical method for treating and utilizing the coal gangue is needed.
How to cope with carbon dioxide emissions is a problem to be solved, and various efforts are currently being made to reduce the emissions of domestic greenhouse gases, carbon capture storage and utilization technologies are unprecedented and developed, and mine carbon dioxide fire prevention and extinguishing technologies are primarily popularized and applied, but there is a certain risk in storing, filling, transporting and applying carbon dioxide in a gaseous state or in a liquid state.
The country is the largest coal production and consumption country in the world, and according to statistics, 130 or more large and medium-sized mining areas of 25 main coal producing provinces in the country are threatened by the natural ignition of coal beds to different degrees. In the key coal mines of 657 nationally, the number of the coal mines prone to natural ignition of the coal seams accounts for 54.9%. The number of mines with the shortest natural ignition period less than 3 months is more than 50%, and the spontaneous combustion fire seriously affects the coal mine safety production. Goaf is the main place where spontaneous combustion fire occurs, and goaf air leakage is the fundamental cause of spontaneous combustion.
Therefore, a device for storing carbon dioxide underground in a portable manner in a coal mine and a use method thereof are provided.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a device for storing carbon dioxide underground in a coal mine in a portable manner and a use method thereof, so as to solve the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a colliery is portable device of storing carbon dioxide in pit, includes the cavity, be provided with semi-closed cavity in the cavity the charging hole has been seted up on the top of cavity, the cavity internal fixation of cavity has the sealing membrane, charging hole department is provided with sealed lid, cavity lateral wall is close to top department and reserves the round pin axle through-hole, sealed lid side is reserved and is had the round pin axle blind hole, still be fixed through cylindric lock is supplementary between sealed lid and the cavity.
Furthermore, the cavity is specifically a cuboid or a cylinder, and is a high-pressure-bearing gangue reinforced concrete structure which is formed by pouring gangue concrete and a reinforcement cage.
Furthermore, the sealing film is made of rubber, the shape of the sealing film is the same as that of the hollow cavity in the cavity, and the sealing mode of the sealing film is cementing.
Further, the charging port and the sealing cover are of mutually matched round platform structures, solid carbon dioxide is filled in the sealing film of the cavity through the charging port, the sealing film is sealed by cementing, then the sealing cover is inserted into the charging port, and then the cylindrical pin is inserted into the pin shaft through hole of the reserved cavity and the pin shaft blind hole of the sealing cover to tightly clamp the sealing cover, so that a working main body is formed.
The application method of the device for storing carbon dioxide in underground coal mine comprises the steps of preparing a cavity, a sealing film and a sealing cover of the device on the ground, and conveying the device and a solid carbon dioxide device stored independently to an underground working surface through a mine conveying system; filling solid carbon dioxide into the underground working face device cavity, and performing sealing work to form a working main body;
Then, the working main body is used for building auxiliary sealing walls on the inner sides of roof-cutting and entry-retaining channels of the working face under stoping, used for building fireproof sealing walls at intervals of the upper end and the lower end of a goaf of the U-shaped ventilation working face under stoping, or used for being put into the goaf through the upper corner and the lower corner of the working face under stoping;
When the working main body is used for building an auxiliary sealing wall on the inner side of a roof-cutting entry retaining of a working face under stoping, the entry retaining wind flow can be prevented from leaking into the goaf and harmful gas in the goaf can be prevented from leaking out, and carbon dioxide can be effectively stored during stoping of the working face;
When the working main body is used for the upper end and the lower end of the goaf of the U-shaped ventilation working face under stoping, fireproof sealing walls are built at intervals, and air leakage of the stoping working face through an O-shaped air leakage channel at the periphery of the goaf can be prevented. Carbon dioxide can also be stored during face recovery with the working body;
when the working main body fills the goaf, the goaf air leakage channel behind the working face frame can be reduced, and the working main body can be utilized to effectively store carbon dioxide during working face stoping;
After the working main body finishes the stoping of the working face, the working main body is totally reserved in a closed goaf, and is partially broken under the actions of roof caving and groundwater, solid carbon dioxide in the working main body leaks, and formed gaseous carbon dioxide can inert coal remaining in the goaf and is used for fire prevention and fire extinguishing.
Compared with the prior art, the invention has the following advantages:
According to the invention, coal gangue is utilized to replace coarse and fine aggregates in concrete, so that not only is the waste utilized, but also the land resource is saved, and the device is multipurpose, and not only can the device store carbon dioxide, but also a cuboid device can be used for building an auxiliary sealing wall in a roof-cutting entry retaining way or building a fireproof sealing wall at the upper end and the lower end of a traditional working face, and a cylindrical device can be used for filling a goaf; when the working main body is used for the upper end and the lower end of a goaf of the U-shaped ventilation working face under stoping, fireproof sealing walls are built at intervals, the air leakage of the stoping working face through an O-shaped ring air leakage channel at the periphery of the goaf can be prevented, and carbon dioxide can be stored by the working main body during stoping of the working face; when the working main body fills the goaf, the goaf air leakage channel behind the working face frame can be reduced, and the working main body can be utilized to effectively store carbon dioxide during working face stoping; after the working main body finishes the stoping of the working face, the working main body is totally reserved in a closed goaf, and is partially broken under the actions of roof caving and groundwater, solid carbon dioxide in the working main body leaks, and formed gaseous carbon dioxide can inert coal remaining in the goaf and is used for fire prevention and fire extinguishing.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention in semi-section;
FIG. 3 is a schematic view of a roof-cutting pressure-relief entry face of the present invention;
fig. 4 is a schematic view of a U-shaped ventilation work surface of the present invention.
Reference numerals illustrate:
1-a cavity; 2-sealing film; 3-sealing cover; 4-cylindrical pins; 5-roadway; 6-working surface; 7-a temporary sealing wall; 8-working body; 9-auxiliary sealing walls; 10-goaf; 11-a fireproof sealing wall; 12-section coal pillar.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-2, the present invention provides a technical solution: the device for storing carbon dioxide in a coal mine underground portable manner comprises a cavity body 1, wherein a semi-closed hollow cavity is arranged in the cavity body 1, the cavity body 1 is in the shape of a cuboid or a cylinder, and a charging port is formed in the top end of the cavity body 1;
In this embodiment, the outer dimensions of the cavity 1 are 200mm×200mm×180mm, the inner structure is a cylindrical cavity with a diameter of 80mm and a height of 100mm, and a circular truncated cone charging port with a diameter of 80mm at the bottom, a diameter of 100mm at the top and a height of 50 mm.
The cavity 1 is a high-pressure-bearing gangue reinforced concrete structure, the high-pressure-bearing gangue reinforced concrete structure is formed by pouring gangue concrete and a reinforcement framework, the reinforcement framework is used as the framework, the compressive strength of the device is greatly improved, the gangue concrete is made of waste residues, cement and water generated in the mining and processing process of coal, the substitution rate of gangue for coarse and fine aggregates is 100%, the particle size of the coarse aggregates is 20mm, the particle size of the fine aggregates is 5mm, the reinforcement framework is wrapped by using C40 cement, and the thickness of the gangue concrete outside the reinforcement framework is 20mm.
The steel reinforcement framework comprises two parts, wherein one part is a longitudinal reinforcement, and the other part is a stirrup. The cavity 1 is provided with 8 longitudinal ribs in total, hoops are fixed on the longitudinal ribs at a position 10mm away from the bottom end of the cavity 1, and then the hoops are fixed every 40 mm; the longitudinal bars are HRB335 steel bars with the diameter of 14mm, and the processing length of the longitudinal bars is 180mm; the stirrup is selected from steel bars of HPB300 with the diameter of 6mm, and the processed length of the stirrup is 1375mm.
The sealing film 2 is fixed in the hollow cavity of the cavity 1, the sealing film 2 is made of rubber, the shape of the sealing film 2 is the same as that of the hollow cavity in the cavity 1, and the sealing mode of the sealing film 2 is cementing.
The charging port is provided with a sealing cover 3, a pin shaft through hole is reserved at the position, close to the top end, of the side wall of the cavity 1, a pin shaft blind hole is reserved at the side end of the sealing cover 3, and the sealing cover 3 and the cavity 1 are fixed in an auxiliary mode through a cylindrical pin 4.
The charging port and the sealing cover 3 are of mutually matched round platform structures, after solid carbon dioxide is filled into the sealing film 2 of the cavity 1 through the charging port, the sealing film 2 is sealed by cementing, then the sealing cover 3 is inserted into the charging port, and then the cylindrical pin 4 is inserted into the pin shaft through hole of the reserved cavity 1 and the pin shaft blind hole of the sealing cover 3, so that the sealing cover 3 is clamped, and the working main body 8 is formed.
As shown in fig. 3-4, a method for using a device for storing carbon dioxide in a coal mine is provided, wherein a cavity 1, a sealing film 2 and a sealing cover 3 of the device are prepared on the ground, and the device and a solid carbon dioxide device stored separately are transported to a working surface in the coal mine through a mine transportation system; filling solid carbon dioxide into the underground working face device cavity 1, and performing sealing work to form a working main body 8;
Then, the working main body 8 is used for building auxiliary sealing walls 9 on the inner sides of the roof-cutting entry retaining of the working face 6 under stoping, used for building fireproof sealing walls at intervals of a certain distance at the upper end and the lower end of the goaf 10 of the U-shaped ventilation working face under stoping, or used for throwing the working face under stoping into the goaf 10 through the upper corner and the lower corner of the working face 6 under stoping;
when the working main body 8 is used for building the auxiliary sealing wall 9 on the inner side of the roof-cutting entry retaining of the working face 6 under stoping, the leakage of harmful gas in the goaf 10 caused by entry retaining wind flow can be prevented, and carbon dioxide can be effectively stored during stoping of the working face 10;
When the working main body 8 is used for the upper end and the lower end of the goaf 10 of the U-shaped ventilation working face under stoping, fireproof sealing walls are built at intervals, air leakage of the stoping working face through an air leakage channel of an O ring on the periphery of the goaf can be prevented, and carbon dioxide can be stored by the working main body 8 during stoping of the working face;
When the working body 8 fills the goaf 10, the goaf air leakage channel behind the working face 6 can be reduced, and carbon dioxide can be effectively stored by the working body 8 during the stoping of the working face 6;
After the working main body 8 is completely mined out on the working face, the working main body is totally reserved in a closed goaf 10, and is partially broken under the actions of roof caving and groundwater, solid carbon dioxide in the working main body 8 leaks, and formed gaseous carbon dioxide can inert coal remaining in the goaf and is used for fire prevention and fire extinguishment.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. The application method of the device for storing carbon dioxide in the coal mine is characterized by comprising the following steps of: the device comprises a cavity (1), wherein a semi-closed hollow cavity is arranged in the cavity (1), the cavity (1) is specifically a cuboid or a cylinder, the cavity (1) is of a high-pressure-bearing gangue reinforced concrete structure, and the high-pressure-bearing gangue reinforced concrete structure is formed by pouring gangue concrete and a reinforcement cage; the automatic sealing device is characterized in that a charging hole is formed in the top end of the cavity (1), a sealing film (2) is fixed in a hollow cavity of the cavity (1), a sealing cover (3) is arranged at the charging hole, a pin shaft through hole is reserved at the side wall of the cavity (1) close to the top end, a pin shaft blind hole is reserved at the side end of the sealing cover (3), the sealing cover (3) and the cavity (1) are further fixed in an auxiliary mode through a cylindrical pin (4), the charging hole and the sealing cover (3) are of mutually matched round platform structures, after solid carbon dioxide is filled in the sealing film (2) of the cavity (1) through the charging hole, the sealing film (2) is sealed by cementing, then the sealing cover (3) is inserted into the charging hole, and then the cylindrical pin (4) is inserted into the pin shaft through hole of the reserved cavity (1) and the pin shaft blind hole of the sealing cover (3), so that the sealing cover (3) is clamped to form a working main body (8);
The method specifically comprises the following steps: firstly preparing a cavity (1), a sealing film and a sealing cover of the device on the ground, and conveying the cavity, the sealing film and the sealing cover and the solid carbon dioxide device which is stored separately to a downhole working surface through a mine conveying system; filling solid carbon dioxide into the underground working face device cavity (1) and performing sealing work to form a working main body (8);
then, the working main body (8) is used for building auxiliary sealing walls (9) on the inner sides of roof cutting and retaining roadways of the working face (6) which is being stoped, the upper end and the lower end of a goaf (10) of the U-shaped ventilation working face which is being stoped, and fireproof sealing walls (11) are built at intervals of a preset distance or are used for being put into the goaf (10) through the upper corners and the lower corners of the working face (6) which is being stoped;
When the working main body (8) is used for building an auxiliary sealing wall (9) on the inner side of a roof-cutting entry retaining of a working face (6) under stoping, entry retaining wind flow can be prevented from leaking into a goaf (10) and harmful gas in the goaf (10), and carbon dioxide can be effectively stored during stoping of the working face (10);
when the working main body (8) is used for the upper end and the lower end of the goaf (10) of the U-shaped ventilation working face under stoping, and fireproof sealing walls are built at intervals of a preset distance, the air leakage of the stoping working face through an air leakage channel of an O-shaped ring on the periphery of the goaf can be prevented, and carbon dioxide can be stored by the working main body (8) during stoping of the working face;
When the working main body (8) fills the goaf (10), the air leakage channel of the goaf behind the working face (6) can be reduced, and carbon dioxide can be effectively stored by the working main body (8) during the stoping of the working face (6);
After the working main body (8) is completely mined out on the working surface, the working main body is totally reserved in a closed goaf (10), and is partially broken under the actions of roof caving and groundwater, solid carbon dioxide in the working main body (8) leaks, and formed gaseous carbon dioxide can inert coal remaining in the goaf and is used for fire prevention and fire extinguishing.
2. The method for using the device for storing carbon dioxide underground by using the coal mine is characterized in that the sealing film (2) is made of rubber, the shape of the sealing film (2) is the same as the shape of a hollow cavity in the cavity (1), and the sealing mode of the sealing film (2) is cementing.
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CN208137992U (en) * 2017-12-26 2018-11-23 西安科技大学 A kind of New Mine flame range flame proof fire dam
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CN202090497U (en) * 2011-06-10 2011-12-28 周永祺 Building brick with fireproof function
CN202578775U (en) * 2012-05-02 2012-12-05 苏州华福低温容器有限公司 Movable carbon dioxide storage tank for coal mine
CN103422886A (en) * 2013-08-14 2013-12-04 中国神华能源股份有限公司 Artificial retaining dam for coal mine distributed underground reservoir and damming method thereof
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