A goaf CO 2 Sealing support method

Abstract

The present invention discloses a CO2 intelligent storage box and a gob area CO2 sequestration support method. The CO2 intelligent storage box includes a box body, which is divided into an inner box shell for storing liquid CO2 and a box body outer shell provided outside the inner box shell for protecting the inner box shell; a box body steel frame and an interlocking steel frame for increasing firmness are provided outside the box body outer shell; a temperature control device, a pressure change device, an intelligent seal, and a seal reinforcement ring for increasing seal tightness are provided at the top of the box body; the temperature and pressure control devices respectively include a display, a control valve, and a dispensing block. At the same time, by using the CO2 intelligent storage box of the present invention, CO2 can be permanently stored in the underground gob area, and in case of necessity, it can play a supporting role in the gob area, thereby realizing the treatment of CO2 quickly, efficiently, with zero pollution and low cost.

Description

Technical Field

[0001] The present invention belongs to the field of coal mine gas treatment, and specifically relates to a method for treating a goaf CO 2 Sealing support method. Background Art

[0002] With the development of modern industry, the uncontrolled burning of fossil fuels, the indiscriminate felling of trees by humans, the continuous acceleration of urbanization and the continuous increase in population base have led to an increase in CO2 in the atmosphere. 2 The content continued to increase, and the temperature of the earth's surface gradually rose, thus forming CO 2 The greenhouse effect and rising temperatures have caused the polar glaciers to melt, and coastal countries and cities are facing the crisis of being submerged by sea water; temperature changes have caused climate zones to move, and various animals and plants have no time to adapt to the changed environment and are facing the disaster of genocide; changes in climate and precipitation brought about by climate change have caused changes in crop yields and distribution patterns. The emergence of these disasters is closely related to human behavior and has become a huge climate problem that cannot be underestimated or ignored by mankind.

[0003] In order to solve the climate problems caused by the greenhouse effect, countries around the world regard environmental issues as important issues that are inevitable and must be solved for human development. The culprit of the greenhouse effect is CO 2 How to control CO 2 production or the CO already present in the atmosphere 2 How to reduce its content is the problem that needs to be solved now. With the continuous innovation of technology, methods and ideas, chemical and physical means are used to control CO 2 There are many methods to treat CO, but most of these methods have many problems such as difficult treatment conditions, high treatment costs, and the generation of new pollution. Therefore, how to quickly, efficiently, zero pollution, and low costly treat CO 2 This is a difficult problem we are currently facing. Summary of the invention

[0004] The purpose of the present invention is to provide a goaf CO 2 Storage support method. 2 Smart storage boxes can store CO 2 It is sealed in underground goaf for a long time and, when necessary, provides support for the goaf.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical solutions:

[0006] The present invention provides a CO 2 The intelligent storage box comprises a box body;

[0007] The tank includes a container for storing liquid CO 2 A box inner shell, and a box outer shell provided outside the box inner shell and used to protect the box inner shell;

[0008] The outer shell of the box body is provided with a box body steel frame and a chain steel frame to increase firmness;

[0009] The top of the box is provided with a temperature control device and an air pressure change device for controlling the temperature and pressure of the box, an intelligent seal, and a seal reinforcement ring for increasing the sealing performance;

[0010] The temperature control device includes a temperature display that displays the temperature in the inner shell of the box, a temperature control valve that controls the temperature change in the box, and a temperature adjustment block with an adjustment function;

[0011] The air pressure variation device comprises a pressure display for displaying the pressure in the inner shell of the box, a pressure control valve for controlling the pressure variation in the box, and a pressure adjustment block with an adjustment function.

[0012] Furthermore, a rigid support body is provided outside the box body; the rigid support body includes a box body fixing bin arranged outside the box body outer shell; a protective steel shell is provided outside the box body fixing bin for protection; hydraulic columns are provided at the corners of the box body fixing bin; and column connecting ports are provided on the hydraulic columns for connecting more than two rigid support bodies.

[0013] Furthermore, the top and bottom ends of the rigid support body are provided with a detachable top beam and a detachable base for increasing stability.

[0014] Furthermore, the hydraulic column and the box-fixed compartment are connected by a connecting column; the height of the hydraulic column is not lower than the box-fixed compartment.

[0015] Furthermore, the inner shell of the box body is a cylinder, which is made of concrete and high-strength compression-resistant and corrosion-resistant materials; the outer shell of the box body is an octahedron, which is made of a rigid material with high strength and corrosion resistance.

[0016] Furthermore, the outer shell of the box is also provided with a box category mark, a box information plate, a warning sign, a portable stroking hole and a box status display column.

[0017] The present invention also provides a goaf CO 2 The sealing support method comprises the following steps:

[0018] (1) Utilization of CO 2 The gas collection system collects air and converts CO 2 The gas is separated from other gases and purified, and the purified CO 2 Gas is cooled and compressed into CO 2 liquid;

[0019] (2) CO 2 The liquid is charged into the CO according to claim 1 2 The coal is sealed in an intelligent storage box, transported to the coal mine goaf through a transportation system, and finally the goaf is sealed using an isolation wall.

[0020] Furthermore, the CO 2 The gas collection system is divided into a collection and separation system and a cooling and compression system;

[0021] The gas collection system includes a gas collection room, on the top of which two or more fans are set up to collect air; one side of the fan is in direct contact with the air, and the other side is connected to the wind pipe. At this time, the air collected by the fan is transported to the gas separator set in the gas collection room through the wind pipe to separate the CO in the air. 2 The gas and other gases are separated and purified; the other gases after separation are discharged into the atmosphere through the gas separator through the wind tube and air discharge column connected above, and the CO 2 The gas is transported to the cooling and compression system through the underground pipeline connected to the rear of the gas separator for further processing;

[0022] The cooling and compression system includes a cooling compressor; CO transported via an underground transmission pipeline 2 The gas is transported to a cooling compressor installed on the ground; the cooling compressor is equipped with a temperature regulator and a pressure regulator, which converts CO 2 Gas is cooled and compressed into CO 2 Liquid; the CO 2 The liquid is transported to the CO 2 Packing and sealing in smart storage boxes;

[0023] The transportation system includes a conveyor, a boxed and sealed CO 2 The intelligent storage box is transported to the coal mine goaf by the conveyor to complete the CO 2 The sealing work.

[0024] Furthermore, the wind duct connected to the fan is connected to the side of the air buffer tower arranged on the top of the gas collection room. At this time, the air flow rate collected by the fan can be reduced, so that the air can flow into the gas separator at a gentle speed; the lower end of the air buffer tower is connected to the gas separator through the wind duct, and a wind duct valve is provided on the wind duct connecting the air buffer tower and the gas separator, which can control the air entering the gas separator at any time.

[0025] Furthermore, in transporting the CO 2In the process of the intelligent storage box to the coal mine goaf, an automatic injection port is provided at the end of the liquid delivery pipeline, which can automatically inject the liquid into the liquid. 2 The intelligent seal on the top of the intelligent storage box is connected, and the injection and packing operation is completed in a short time. After the packing is completed, the automatic injection port can automatically connect to the CO 2 The intelligent storage box is separated to carry out the next packing task; the start and stop of the conveyor can control the working state of the automatic injection port.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The present invention designs a method that is beneficial to CO 2 The intelligent storage box for collecting and storing CO can use the temperature control device and the air pressure change device to automatically adjust the temperature and air pressure in the box according to the temperature and pressure changes inside the box and the influence of different factors outside the box, so that the CO in the box 2 Always remain in liquid state, so as to achieve CO 2 long term storage.

[0028] 2. The present invention further provides 2 Based on the intelligent storage box, a supporting CO 2 Smart storage boxes can effectively store CO 2 , and can also make each CO 2 The smart storage box becomes a simple "hydraulic support", which provides support for the goaf with the risk of collapse and prevents the collapse of the goaf.

[0029] 3. The present invention first collects air from the atmosphere and separates CO 2 The gas is separated from other gases, and the separated and purified CO 2 The gas is converted into CO by gas cooling and compression equipment 2 Liquid, compressed liquid CO 2 Load the CO 2 The smart storage box is then transported to the coal mine goaf through the mine shaft and tunnels to complete the CO 2 The CO 2 Intelligent storage box and goaf CO 2 The sealing and support method is not only applicable to mines with poor geological conditions and prone to collapse of goaf, but also to goafs with good geological conditions and no need for support. Therefore, it is applicable to a wide range of scenarios, thus achieving rapid, efficient, zero-pollution, and low-cost treatment of CO 2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 CO in the goaf 2 Technical flow chart of sealing and support;

[0031] Figure 2 This is a schematic diagram of the layout of the gas collection room;

[0032] Figure 3 This is a schematic diagram of the working principle of the gas separator;

[0033] Figure 4 This is a schematic diagram of the layout of the cooling compression system;

[0034] Figure 5 For CO 2 Schematic diagram of the structure of the intelligent storage box; a is the main view, b is the left view, and c is the top view;

[0035] Figure 6 Supported CO 2 Schematic diagram of the structure of the intelligent storage box;

[0036] Figure 7 Supported CO 2 Schematic diagram of the intelligent storage box assembly support;

[0037] Figure 8 CO in the goaf 2 Schematic diagram of the containment and goaf support system.

[0038] Among them, 1. fan, 2. air duct, 3. gas separator, 4. air buffer tower, 5. air duct valve, 6. air discharge column, 7. underground transmission pipeline, 8. separation membrane, 9. cooling compressor, 10. temperature regulator, 11. pressure regulator, 12. liquid transmission pipeline, 13. CO 2 Intelligent storage box, 14. Conveyor, 15. Pipeline connecting valve, 16. Automatic injection port, 17. Box inner shell, 18. Box outer shell, 19. Box steel frame, 20. Interlocking steel frame, 21. Category mark, 22. Box information board, 23. Warning sign, 24. Portable caressing hole, 25. Box status display column; 26. Pressure display, 27. Temperature display, 28. Pressure control valve, 29. Temperature control valve, 30. Pressure adjustment block, 31. Temperature adjustment block, 32. Sealing reinforcement ring, 33. Intelligent sealing, 34. Box fixed warehouse, 35. Protective steel shell, 36. Connecting column, 37. Removable top beam, 38. Removable base, 39. Hydraulic column, 40. Column connection port, 41. Isolation wall, 42. Steel belt, 43. Hydraulic support, 44. Coal mining machine, 45. Scraper conveyor, 46. Goaf, 47. Coal seam. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described in detail with reference to the following specific examples. Example

[0040] The goaf CO of the present invention 2 Sealing support method, its technical flow chart is as follows Figure 1 As shown, the present invention collects air from the atmosphere and separates CO 2 The gas is separated from other gases, and the separated and purified CO 2 The gas is converted into CO by gas cooling and compression equipment 2 Liquid, compressed liquid CO 2 The smart storage box is then transported to the coal mine goaf through the mine shaft and tunnels, thus completing the CO 2 Of which, CO 2 The collection and packaging of CO are completed on the ground, and the other steps are carried out underground. 2 Smart storage boxes not only carry CO 2 The main systems involved in the method are CO 2 Gas collection systems, CO 2 Intelligent storage tanks, transportation systems, goaf CO 2 The sealing system and goaf support system are as follows:

[0041] 1. CO 2 Gas Collection System

[0042] CO 2 The main task of the gas collection system is to complete the collection of CO 2 The gas collection and cooling and compression work consists of two subsystems: the collection and separation system and the cooling and compression system. The collection and separation system sucks air into the gas separator, which removes CO in the air through physical methods. 2 Separate it to obtain higher purity CO 2 Gas, and the cooling and compression system is to separate the CO 2 The gas is compressed into liquid by cooling and compression equipment, and then the liquid CO 2 are put into smart storage boxes to achieve the goal of CO 2 Purpose of gas collection. The separated gas CO 2 It is transported to the refrigeration compression equipment through the gas pipeline, while other gases in the separated air are still discharged into the atmosphere without any other treatment.

[0043] (1) Collection and separation system

[0044] Select old mines with suitable geographical locations (remote areas far away from cities) and appropriate mining depths (below 800m from the surface) or producing mines with good working conditions, and build gas collection rooms not far from the mining area ( Figure 2 ), the function of the gas collection room is to complete the preliminary collection of air and the placement of the gas separator. The gas collection room can be established in groups or separately.

[0045] like Figure 2 As shown, multiple fans 1 are set up on the top of the gas collection room to collect air and complete the first step of air collection. The size, power and specific number of fans 1 can be designed according to natural conditions and construction conditions, and the design principle must be reasonable and efficient. The upper side of the fan 1 is in direct contact with the air and is isolated by a mesh cover with high rigidity to prevent the fan 1 from sucking impurities in the air during operation and causing dangerous accidents; the lower side of the fan 1 is connected to the wind tube 2 to transport the air sucked by the fan 1 to the gas separator 3 in the gas collection room. The body of the wind tube 2 is connected with a steel belt 42 and fixed on the roof with a rigid tripod. An air buffer tower 4 is set at the position where the wind tube 2 extends from the roof to the room to reduce the air flow rate sucked from the fan 1, so that the air sucked into the wind tube 2 flows into the gas separator 3 at a relatively slow speed to prevent the air flow rate from being too high and destroying the wind tube 2 and other equipment. The material of the wind tube 2 can be a metal with high corrosion resistance and will not react with the gas in the air (such as aluminum alloy). Inside the gas separation room, the lower end of the air buffer tower 4 is connected to the gas separator 3 through the wind tube 2. A wind tube valve 5 is provided on the wind tube 2 connecting the air buffer tower 4 and the gas separator 3, which can control the air entering the gas separator 3 at any time. The gas separators 3 can be used in combination. Each gas separator 3 is connected to the air discharge column 6 through the wind tube 2 connected above. The air separated by the gas separator 3 is discharged into the atmosphere from the wind tube 2 connected to the top of each gas separator 3 and the air discharge column 6 without any treatment; and the separated CO 2 The gas will be transported to the cooling and compression system through the underground transmission pipeline 7 connected to the rear of the gas separator 3 for further processing.

[0046] It should be noted that the gas separator 3 is a CO 2 The only link in gas purification is also one of the most important links. Figure 3 As shown, the separation principle of the gas separator 3 is a physical method: five physical separation membranes 8 are designed inside the gas separator 3, and the separation membranes 8 can only pass CO 2 The air from the wind tube 2 enters the gas separator and passes through five layers of separation membranes 8 in sequence, thus completing the separation of CO 2 Gas purification and collection work.

[0047] (2) Cooling compression system

[0048] Due to CO 2 The gas is colorless and odorless, and it is difficult to distinguish with the naked eye, so the gaseous CO 2 It is difficult to collect and store the gas, and the collected gas takes up a lot of space and is easy to leak. Compared with gas, liquid can be collected and stored more conveniently and efficiently. Therefore, the gas CO after separation and purification is stored in the 2 Converting it into liquid state allows for more convenient and larger quantities of storage.

[0049] The cooling and compression system uses a specific cooling compressor 9 to convert the purified CO 2 The gas is converted into liquid under low temperature and high pressure conditions, and then the liquid CO 2 Loaded with CO 2 Smart storage tank 13, completes the liquid CO 2 collection and storage work.

[0050] like Figure 4 As shown, the underground transmission pipeline 7 is connected to the cooling compressor 9 on the ground, and the cooling compressor 9 is connected to the CO 2 Smart storage box 13 is connected, CO 2 A conveyor 14 is provided below the intelligent storage box 13. The gas CO transported by the underground transmission pipeline 7 2 The gas CO is transported to a cooling compressor 9 installed on the ground. The cooling compressor 9 is provided with a temperature regulator 10 and a pressure regulator 11. The gas CO is converted into 2 is converted into liquid state and then transported to the CO 2 In the intelligent storage box 13, the packed CO 2 The smart storage box 13 is transported to the next link by the conveyor 14 .

[0051] In this process, each cooling compressor 9 operates independently, but has an independent liquid delivery pipeline 12 inside. If the workload is large, multiple cooling compressors 9 can be connected through pipeline connection valves 15, so that the liquid CO 2 The gaseous CO2 is transported out through the connected liquid delivery pipeline 12, which increases the work efficiency and reduces the workload and cost of installing multiple pipelines. At the same time, each cooling compressor 9 is provided with a temperature regulator 10 and a pressure regulator 11, and the operator can manually adjust the gaseous CO2. 2 Converted into liquid CO 2The temperature and pressure of the liquid CO can also control the working time and working state of the cooling compressor 9. 2 Loading CO 2 The intelligent storage box 13 is automatically completed, and the CO on the conveyor 14 2 When the intelligent storage box 13 passes over the liquid delivery pipeline 12, the automatic injection port 16 disposed at the end of the liquid delivery pipeline 12 will automatically inject CO 2 The special intelligent seal 33 on the top of the intelligent storage box 13 is connected, and the injection and boxing operation is completed in a short time; after the boxing is completed, the automatic injection port 16 will automatically connect to the CO 2 The intelligent storage box 13 is separated and the next packing task is performed. Moreover, the conveyor 14 and the automatic injection port 16 will maintain a linkage state, that is, the start and stop of the conveyor 14 will control the working state of the automatic injection port 14.

[0052] 2. CO 2 Smart storage box

[0053] Liquid CO formed by cooling and compression system 2 If it leaves a certain state condition, it will turn back into gas state, so it is not conducive to CO 2 Collection and storage of CO 2 The intelligent storage box 13 is characterized in that a temperature control device and an air pressure change device are arranged on the box body. The liquid CO2 after being processed by the cooling and compression system 2 After packaging, in order to prevent liquid CO 2 The temperature control device and the air pressure changing device will automatically adjust the temperature and air pressure in the box according to the temperature and pressure changes inside the box and the influence of different factors outside the box, so that the CO in the box 2 Always remain in liquid state, so as to achieve CO 2 long term storage.

[0054] like Figure 5 As shown, CO 2 The main structure of the intelligent storage box 13 is mainly composed of an inner shell 17 and an outer shell 18. The inner shell 17 is a cylinder made of concrete and high-strength compression-resistant and anti-corrosion materials. It is mainly used for storing liquid CO 2 The box shell 18 is arranged outside the box inner shell 17, and is an octahedral structure. It is made of a rigid material with high strength and corrosion resistance. It is mainly used to protect the box inner shell 17, so that the box can maintain a working state for a long time under harsh conditions, and prevent liquid CO 2Leakage. The dimensions of the box inner shell 17 and the box outer shell 18 can be designed according to actual storage needs. A box steel frame 19 and an interlocking steel frame 20 are arranged outside the box outer shell 18, the purpose of which is to more firmly protect the box body of the smart storage box 13 from damage; in addition, some convenient settings about the box information are also arranged outside the box outer shell 18, such as the box category mark 21, the box information board 22, the warning mark 23, the portable hole 24 and the box status display column 25, etc. A vacuum hole and a vacuum valve are also arranged outside the box outer shell 18. The most important thing is the design of the top of the box body of the smart storage box 13. A temperature control device and an air pressure change device for controlling the temperature and pressure of the box body are arranged on the top of the box body, as well as an intelligent seal 33 that can be automatically connected to the automatic injection port 16 and a seal reinforcement ring 32 that increases the sealing performance of the seal. The device includes a display, a control valve and a mixing block. The pressure display 26 and the temperature display 27 can always display the pressure and temperature changes in the box body. The pressure control valve 28 and the temperature control valve 29 mainly control the pressure and temperature changes in the box body. 2 After packing, some CO 2 The temperature and pressure in the inner shell 17 of the intelligent storage box 13 may not meet the requirements due to some reasons. At this time, the inspector can adjust the temperature and pressure in the inner shell 17 of the box to appropriate conditions through the pressure control valve 28 and the temperature control valve 29. After that, the pressure control valve 28 and the temperature control valve 29 will no longer be operated manually, and the pressure adjustment block 30 and the temperature adjustment block 31 are mainly used in the CO 2 After the intelligent storage box 13 is sealed in the goaf, in order to achieve the purpose of long-term storage, it can self-regulate so that the pressure and temperature of the inner shell 17 of the box body remain in an ideal state for a long time.

[0055] In addition, because the CO 2 For some mined-out areas with poor geological conditions and no treatment, CO 2 After the intelligent storage box 13 is sealed for a long time, the goaf may collapse or fall down. Therefore, the CO stored in such goaf may 2 It is very likely that the gas will leak out of the goaf due to the change in the spatial state of the goaf and the change in the geological structure, which is extremely unfavorable to CO 2 In view of the above problems, in the aforementioned CO 2 Based on the design and manufacture of the intelligent storage box 13, a supporting CO 2 Smart storage tanks are designed to store CO 2 At the same time, it plays a certain supporting role in the goaf with the risk of collapse.

[0056] like Figure 6 As shown, keep the aforementioned CO 2The intelligent storage box 13 does not make any design changes, but only designs a rigid support body that can accommodate the storage box and has a supporting function according to the size of its box shell 18, so that each CO 2 The smart storage box 13 becomes a simple "hydraulic support" to store CO 2 The rigid support body includes a box-fixed bin 34, a protective steel shell 35, a connecting column 36, a detachable top beam 37 and a detachable base 38. The box-fixed bin 34 is arranged outside the intelligent storage box 13, and a protective steel shell 35 is arranged on its periphery for protection; the shapes of the box-fixed bin 34 and the protective steel shell 35 are consistent with the CO 2 The intelligent storage box 13 matches. Four hydraulic columns 39 are provided at the four corners of the box fixed bin 34. The height of the hydraulic columns 39 is higher than that of the box fixed bin 34. Therefore, only the hydraulic columns 39 can bear the main support task, and the box fixed bin 34 does not have a supporting function. The hydraulic columns 39 are also provided with column connecting ports 40, through which multiple rigid support bodies can be connected. The hydraulic columns 39 and the box fixed bin 34 are connected by connecting columns 36. Each rigid support body is equipped with a detachable top beam 37 and a detachable base 38. The purpose is that the rigid support body can control the top and bottom plates more stably and over a larger area when supporting the goaf. For goafs with a height greater than or equal to the height of one rigid support body and less than or equal to the height of two rigid support bodies, a supporting CO is used. 2 The intelligent storage box can be used for support, and for goafs with a height greater than the height of two rigid supports, multiple supported CO 2 Intelligent storage box combination for support ( Figure 7 ).

[0057] like Figure 7 As shown, in two supporting CO 2 When the intelligent storage box is combined for support, a detachable top beam 37 and a detachable base 38 can be removed, and then the two rigid support bodies are stacked together and connected in the middle with a column connection port 40, so as to achieve support work for the goaf with a large height.

[0058] It should be noted that how to determine whether to use a single or multiple support CO 2 The intelligent storage box supports the goaf, and only needs to determine the height of the goaf as several single-support CO 2 The integral multiple of the height of the intelligent storage box is the number of supporting CO 2 For example, the height of the goaf is just equal to three supporting CO 2 The height of the smart storage box is determined by three supporting CO 2The intelligent storage box is combined to support the goaf, and the height of the goaf is greater than that of three supporting CO 2 The height of the smart storage box is less than four supporting CO 2 The height of the smart storage box is also supported by three CO 2 Smart storage boxes provide combined support.

[0059] 3. Transportation system

[0060] The transport system is a system that transports liquid CO 2 The intelligent storage box is transported from the ground to the underground void area to complete the CO 2 For the production mine, the CO2 can be transported through the mine's auxiliary shaft. 2 The intelligent storage box 13 is transported to the goaf. For abandoned old mines, the transportation channels of the main and auxiliary shafts can be inspected and repaired first. If normal transportation operations can be carried out, the main and auxiliary shafts and transportation lanes can be used for CO 2 If the normal transportation operation cannot be carried out for the intelligent storage box 13, another tunnel is dug to the goaf to transfer the CO 2 After the intelligent storage box 13 is transported to the goaf, the newly excavated tunnel can be landfilled.

[0061] 4. CO in goaf 2 Sealing system and goaf support system

[0062] For goafs with good geological conditions and no need for support, 2 Before the intelligent storage box 13 is transported to the goaf 46, it is only necessary to reasonably plan the spatial location of the goaf in order to obtain a larger amount of CO 2 The smart storage box 13 is placed, and the CO 2 After the intelligent storage box 13 is placed in the goaf 46, a separation wall 41 is built with bricks and stones to separate the transported CO 2 The passage of the intelligent storage box 13 is isolated from the goaf 46, and then treated with sealing materials such as sealant and waterproof coating so that the inside and outside of the goaf are not connected to each other to prevent CO 2 CO in smart storage tank 13 2 After the leak, it overflowed onto the ground along the gaps in the alley.

[0063] For mines with poor geological conditions and prone to collapse of goaf, 2 Before the intelligent storage box 13 is transported to the goaf 46, in addition to rationally planning the spatial location of the goaf, it is also necessary to consider the support of the goaf roof, plan the area supporting the goaf, and then calculate the use of the supported CO 2 The number of intelligent storage boxes is used to support the goaf and the form of support is designed. After all preparations are completed, the supporting CO2 Smart storage tanks to support the goaf 46, and then other CO 2 The intelligent storage box 13 is placed in the remaining planned area, and finally the goaf is sealed with a separation wall 41.

[0064] like Figure 8 As shown, for goaf areas with good geological conditions and no need for support, goaf area 46 can adopt the reasonable planning principle of "large-area placement", that is, Figure 8 The area divided in the middle goaf 46 is all used to place CO 2 Smart storage box 13 (white square area); For the goaf 46 with poor geological conditions and easy collapse, the goaf 46 can adopt the reasonable planning principle of "dispersed support and large-area placement", that is, the gray square area in the figure is the supported CO 2 The support area of ​​the smart storage box. The white square area is CO 2 The placement area of ​​the smart storage box 13.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A CO 2 Sealing support method, It is characterized in that The following steps are involved: (1) Utilization of CO 2 The gas collection system collects air and converts CO 2 The gas is separated from other gases and purified, and the purified CO 2 Gas is cooled and compressed into CO 2 liquid; (2) CO 2 Liquid into CO 2 The coal is sealed in an intelligent storage box, transported to the coal mine goaf through a transportation system, and finally the goaf is sealed with a separation wall; The CO 2 The gas collection system is divided into a collection and separation system and a cooling and compression system; The gas collection system includes a gas collection room, on the top of which two or more fans are set up to collect air; one side of the fan is in direct contact with the air, and the other side is connected to the wind pipe. At this time, the air collected by the fan is transported to the gas separator set in the gas collection room through the wind pipe to separate the CO in the air. 2 The gas and other gases are separated and purified; the other gases after separation are discharged into the atmosphere through the gas separator through the wind tube and air discharge column connected above, and the CO 2 The gas is transported to the cooling and compression system through the underground pipeline connected to the rear of the gas separator for further processing; The cooling and compression system includes a cooling compressor; CO transported via an underground transmission pipeline 2 The gas is transported to a cooling compressor installed on the ground; the cooling compressor is equipped with a temperature regulator and a pressure regulator, which converts CO 2 Gas is cooled and compressed into CO 2 Liquid; the CO 2 The liquid is transported to the CO 2 Packing and sealing in smart storage boxes; The transportation system includes a conveyor, a boxed and sealed CO 2 The intelligent storage box is transported to the coal mine goaf by the conveyor to complete the CO 2 Sealing work; The CO 2 The intelligent storage box comprises a box body; The tank includes a container for storing liquid CO 2 A box inner shell, and a box outer shell provided outside the box inner shell and used to protect the box inner shell; The outer shell of the box body is provided with a box body steel frame and a chain steel frame to increase firmness; The top of the box is provided with a temperature control device and an air pressure change device for controlling the temperature and pressure of the box, an intelligent seal, and a seal reinforcement ring for increasing the sealing performance; The temperature control device includes a temperature display that displays the temperature in the inner shell of the box, a temperature control valve that controls the temperature change in the box, and a temperature adjustment block with an adjustment function; The air pressure changing device comprises an air pressure display for displaying the pressure in the inner shell of the box, a pressure control valve for controlling the pressure change in the box, and a pressure adjustment block with an adjustment function.

2. The goaf CO according to claim 1 2 Sealing support method, It is characterized in that A rigid support body is also provided outside the box body; the rigid support body includes a box body fixing bin arranged outside the box body outer shell; a protective steel shell is provided outside the box body fixing bin for protection; hydraulic columns are provided at the corners of the box body fixing bin; a column connecting port is provided on the hydraulic column for connecting two or more rigid support bodies.

3. The goaf CO according to claim 2 2 Sealing support method, It is characterized in that The top and bottom ends of the rigid support body are provided with a detachable top beam and a detachable base for increasing stability.

4. The goaf CO according to claim 2 2 Sealing support method, It is characterized in that The hydraulic column and the box-fixed compartment are connected by a connecting column; the height of the hydraulic column is not lower than that of the box-fixed compartment.

5. The goaf CO according to claim 1 2 Sealing support method, It is characterized in that The inner shell of the box is a cylinder, which is made of concrete and high-strength compression-resistant and anti-corrosion materials; the outer shell of the box is an octahedron, which is made of a rigid material with high strength and corrosion resistance.

6. The goaf CO according to claim 1 2 Sealing support method, It is characterized in that The outer shell of the box is also provided with a box category mark, a box information plate, a warning mark, a portable touch hole and a box status display column.

7. The goaf CO according to claim 1 2 Sealing support method, It is characterized in that The wind duct connected to the fan is connected to the side of the air buffer tower arranged on the top of the gas collection room. At this time, the air flow rate collected by the fan can be reduced so that the air can flow into the gas separator at a gentle speed; the lower end of the air buffer tower is connected to the gas separator through the wind duct, and a wind duct valve is provided on the wind duct connecting the air buffer tower and the gas separator, which can control the air entering the gas separator at any time.

8. The goaf CO according to claim 1 2 Sealing support method, It is characterized in that In transporting the CO 2 In the process of the intelligent storage box to the coal mine goaf, an automatic injection port is provided at the end of the liquid delivery pipeline, which can automatically inject the liquid into the liquid. 2 The intelligent seal on the top of the intelligent storage box is connected, and the injection and packing operation is completed in a short time. After the packing is completed, the automatic injection port can automatically connect to the CO 2 The intelligent storage box is separated to carry out the next packing task; the start and stop of the conveyor can control the working state of the automatic injection port.

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