Closed mine geothermal circulation mining system and method

Abstract

The invention relates to the technical field of mine geothermal exploitation systems, in particular to a closed mine geothermal circulation exploitation system and method.The system comprises a mine tunnel, an extraction mechanism is installed in the mine tunnel, an exploitation pipe fitting is arranged on the extraction mechanism, and a sweeping mechanism is arranged at the end, extending into the mine tunnel, of the exploitation pipe fitting; the extraction mechanism is connected with a heat preservation shell assembly. A heat preservation mechanism is arranged in the heat preservation shell assembly; the method comprises the following steps of mine geothermal position confirmation, geothermal energy gathering, geothermal energy exchange, medium flowing and medium conveying. Geothermal resources in a mine can be stably extracted, the geothermal resources can be effectively protected and used, the flowing direction of the geothermal resources can be fully controlled so that the geothermal resources can transfer heat energy into a heat conduction medium, use of the geothermal resources is fully achieved, the heating efficiency is improved, the heated medium can be conveniently output, and the heating efficiency is improved. And the use as required is facilitated.

Description

Technical Field

[0001] This invention relates to the field of geothermal mining systems, and more particularly to a closed-loop geothermal mining system and method. Background Technology

[0002] Geothermal energy is a green, low-carbon, and renewable energy source characterized by abundant reserves, wide distribution, and stable reliability, offering broad prospects for utilization and development. China possesses rich geothermal resources, and their development aligns with national energy conservation and emission reduction needs, meeting the energy demands of societal development. However, China's geothermal energy development faces challenges, including a focus on direct geothermal utilization, a relatively low proportion of geothermal power generation, and the need for further improvement in core technologies.

[0003] my country has over 10,000 abandoned coal mines awaiting development. These mines are rich in geothermal resources, and their development holds immense potential. Both domestic and international research has been conducted on the geothermal resources in deep coal mines, achieving some progress. Combining the science and technology of geothermal resource utilization with the actual conditions of abandoned coal mines is of great research significance and value.

[0004] Typical methods for developing and utilizing geothermal resources include dry steam power generation, flash power generation, dual-cycle power generation, and full-flow power generation technologies. Emerging methods include hot dry rock power generation, thermal photovoltaic power generation, supercritical CO2 cycle power generation, and multi-energy complementary power generation technologies. These methods have advantages such as simple processes, mature technology, and safety and reliability. However, they also have disadvantages such as large equipment footprint, high equipment wear and tear, high applicable geothermal temperature requirements, low thermal efficiency, and inapplicability to small-scale geothermal resources.

[0005] CN118346552A discloses a method for multi-stage in-situ power generation based on the reuse of deep geothermal resources in abandoned coal mines. Based on the organic Rankine cycle principle, it designs an in-situ power generation system that directly utilizes geothermal resources within abandoned coal mines. The main steps are as follows: For abandoned coal mines with geothermal development value, a circulation pipeline is pre-buried in the goaf; according to the actual size and mining level of the coal mine shaft, a multi-stage geothermal in-situ power generation device is rationally constructed in the shaft; a suitable organic circulating working fluid is selected and injected into the circulation pipeline; the geothermal resources collected in the goaf evaporate the organic circulating working fluid to generate steam that drives the in-situ generator; the steam is cooled at the top of the in-situ generator and then flows back into the circulation pipeline through a liquid flow control device. This invention has advantages such as low cost due to full utilization of abandoned mine resources, minimal environmental pollution from completely underground layout, high thermal efficiency of in-situ power generation, and realization of sustainable development in mining areas.

[0006] The above technical solutions cannot fully utilize geothermal energy and are not conducive to ensuring the stability and quality of geothermal energy extraction, so improvements are needed. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for shutting down a geothermal circulation mining system in a mine.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A closed-loop geothermal circulation mining system includes a mine tunnel, an extraction mechanism installed in the mine tunnel, a mining pipe fitting on the extraction mechanism, and a cleaning mechanism at one end of the mining pipe fitting extending into the mine tunnel.

[0010] The extraction mechanism is connected to an insulated shell assembly; the insulated shell assembly is equipped with an insulated mechanism; the insulated shell assembly is equipped with an inner tank, and two partitions are fixed at equal intervals from top to bottom inside the inner tank, with a through pipe in the middle of the partition.

[0011] The inner tank is divided into three installation cavities by two partitions. Each installation cavity contains a coil assembly. The inner tank is equipped with a connecting mechanism, which has a conveying pipe connected to the extraction mechanism.

[0012] Compared with existing technologies, this application can stably extract geothermal resources from mines, effectively protect and utilize geothermal resources, fully control the flow direction of geothermal resources so that they can transfer heat energy into the heat transfer medium, fully realize the use of geothermal resources, improve heating efficiency, and facilitate the output of the heating medium for use as needed.

[0013] Preferably, the extraction mechanism includes a pump body assembly installed on one side of the upper end of the mine tunnel, the mining pipe is installed through the mine tunnel, a heat insulation and sealing assembly is installed on the mine tunnel, a heat insulation pipe is sleeved on the mining pipe, and the heat insulation pipe is disposed between the pump body assembly and the heat insulation and sealing assembly.

[0014] Furthermore, the pump assembly enables geothermal resources to be extracted through the mining pipes and transported stably. At the same time, the insulation pipes effectively maintain the temperature, preventing cooling due to contact between the mining pipes and the outside environment. Additionally, the mining pipes can extract hot air, steam, or hot water resources from the mine as needed.

[0015] Preferably, the cleaning mechanism includes a mounting plate disposed at the lower end of the mining pipe fitting, a filter cover assembly fixedly mounted on the mounting plate, the filter cover assembly being fixedly connected to the lower end of the mining pipe fitting, an L-shaped rotating shaft rotatably sleeved on the mounting plate, the upper end of the L-shaped rotating shaft extending into the mining pipe fitting, the horizontal end of the L-shaped rotating shaft being disposed at the lower end of the mounting plate, a scraper component fixed on the horizontal end of the L-shaped rotating shaft, the scraper component abutting against the outer side of the filter cover assembly.

[0016] Furthermore, in actual operation, the negative pressure generated by the mining pipes causes hot air, steam, or hot water resources in the mine to flow towards the lower end of the mining pipes, i.e., the filter cover assembly. These resources may contain impurities. When the gas or liquid flows, the stirring blade assembly drives the L-shaped rotating shaft to rotate, which enables the scraper to clean the surface of the filter cover assembly, ensuring that hot air, steam, or hot water resources in the mine enter the mining pipes stably.

[0017] Preferably, the insulation mechanism includes a tank assembly, an insulation component is fitted inside the tank assembly, an inner tank is installed inside the insulation component, a delivery pipe passes through the insulation component and the tank assembly and is connected to the pump assembly, and the delivery pipe is located in the installation cavity at the lowest end.

[0018] Furthermore, the insulation components effectively retain heat, preventing heat loss and fully utilizing geothermal energy to heat the materials within the coil components. The three coil components and two connecting pipes facilitate the flow of the heat transfer medium, enhancing the heating effect.

[0019] Preferably, the connecting mechanism includes two connecting pipes that pass through the two partition members, the two connecting pipes being located between the three coil assemblies, and the two connecting pipes being connected to the three coil assemblies.

[0020] Furthermore, in actual use, the coil assembly at the bottom is the first to come into contact with the hottest geothermal resources. As the geothermal resources continue to transfer, they can flow upward through the through-pipe, and the heat is gradually consumed. That is, the coil assembly at the top is preheated by the low-temperature geothermal resources. The preheated medium falls into the coil assembly in the middle and is heated by the medium-temperature geothermal resources. Then, it enters the coil assembly at the bottom and is heated by the hottest geothermal resources. The heated medium can be output through the supply pipe for use.

[0021] Preferably, the upper ends of the insulation mechanism and the inner tank are connected by a suction pipe, and the lower end of the suction pipe extends into the mounting cavity located at the upper end.

[0022] Furthermore, the suction pipe can extract and discharge waste or gas, and can effectively filter and purify it.

[0023] Preferably, a water supply pipe is connected to the uppermost coil assembly, the water supply pipe passing through the inner tank assembly and the insulation mechanism and extending to the outside of the insulation shell assembly.

[0024] Furthermore, it facilitates the supply of heat transfer media for heat exchange with geothermal resources via coil assemblies.

[0025] Preferably, a supply pipe is connected to the coil assembly at the lowest end, the supply pipe passing through the inner tank and the insulation mechanism and extending to the outside of the insulation shell assembly.

[0026] Furthermore, it facilitates the output of the heated heat transfer medium.

[0027] Preferably, the heat preservation mechanism and the inner tank are both provided with a discharge storage component, the discharge storage component is inclined, and the upper end of the discharge storage component extends into the uppermost mounting cavity.

[0028] Furthermore, if liquid accumulation exists, it facilitates discharge and allows for purification and treatment of the liquid.

[0029] This invention also proposes a method for closed-loop geothermal circulation mining, applicable to the aforementioned closed-loop geothermal circulation mining system, comprising the following steps:

[0030] S1. Geothermal Location Confirmation in Mines: Conduct exploration inside closed mines to determine the location of geothermal energy within them;

[0031] S2. Geothermal energy accumulation: By setting up thermal insulation and sealing components to seal the geothermal energy environment, the geothermal energy is prevented from dissipating;

[0032] S3, Geothermal Energy Exchange: Through the cooperation of the pump assembly and mining pipe fittings, geothermal energy in the mine can be extracted and transported into the insulation shell assembly through the pump assembly. As the geothermal energy enters the installation cavity at the lower end through the delivery pipe, it can also enter the two installation cavities at the upper end through the through pipe, which helps to make contact between the geothermal energy and the coil assembly for heat exchange, and can raise the temperature of the medium in the coil assembly.

[0033] S4. Medium Flow: The heat exchange medium can be supplied to the coil assembly through the water supply pipe fittings, and the coil assembly located in the lower mounting cavity can be exposed to high temperature and high heat geothermal energy; and it can be discharged through the supply pipe for use;

[0034] S5. Medium delivery: The medium can be supplied to the upper coil assembly through the water supply pipe fittings, and can flow downward through the cooperation of the two connecting pipes and the two coil assemblies at the lower end for gradual heating. The heated medium can be output through the supply pipe for use.

[0035] The beneficial effects of this invention are:

[0036] 1. The pump body assembly enables geothermal resources to be extracted through the mining pipe fittings and can be transported stably. At the same time, the insulation pipe fittings can effectively keep the temperature up and prevent cooling due to contact between the mining pipe fittings and the outside. The mining pipe fittings can also extract hot air, hot steam or hot water resources from the mine as needed.

[0037] 2. During actual operation, the negative pressure generated by the mining pipe fittings causes hot air, steam, or hot water resources in the mine to flow towards the lower end of the mining pipe fittings, i.e., the filter cover assembly. These resources may contain impurities. When the gas or liquid flows, the stirring blade assembly drives the L-shaped rotating shaft to rotate, which enables the scraper to clean the surface of the filter cover assembly, ensuring that hot air, steam, or hot water resources in the mine enter the mining pipe fittings stably.

[0038] 3. The insulation components can effectively keep the heat out and prevent heat loss. The geothermal energy can be fully utilized to heat the materials in the coil components. The flow of the heat transfer medium is realized through the three coil components and two connecting pipes, which improves the heating effect.

[0039] 4. In actual use, the coil assembly at the bottom is the first to come into contact with the hottest geothermal resources. As the geothermal resources continue to transfer, they can flow upward through the through pipe, and the heat is gradually consumed. That is, the coil assembly at the top is preheated by the low-temperature geothermal resources. The preheated medium falls into the coil assembly in the middle and is heated by the medium-temperature geothermal resources. Then, it enters the coil assembly at the bottom and is heated by the hottest geothermal resources. The heated medium can be output through the supply pipe for use.

[0040] 5. Waste or gas can be extracted and discharged through the suction pipe, and can be effectively filtered and purified; if there is liquid accumulation, it is easy to discharge, and the liquid can be purified and treated. Attached Figure Description

[0041] Figure 1 This is a structural diagram of a closed geothermal circulation mining system proposed in this invention;

[0042] Figure 2 This is an internal structural diagram of an insulation shell assembly in a closed geothermal circulation mining system proposed in this invention.

[0043] Figure 3 This is an internal structural diagram of a filter cover assembly in a closed geothermal circulation mining system proposed in this invention;

[0044] Figure 4 This is a structural diagram of an L-shaped rotating shaft in a closed geothermal circulation mining system proposed in this invention;

[0045] In the diagram: 1 Mine tunnel, 2 Mining pipe fittings, 3 Thermal insulation and sealing components, 4 Thermal insulation pipe fittings, 5 Pump body components, 6 Supply pipe, 7 Discharge and storage components, 8 Suction pipe fittings, 9 Thermal insulation shell components, 91 Tank components, 92 Conveying pipe, 93 Baffle components, 94 Thermal insulation components, 95 Through pipe, 96 Connecting pipe, 97 Water conveying pipe fittings, 98 Coil components, 99 Inner tank components, 10 Mounting plate, 11 Filter cover components, 12 Agitator blade components, 13 L-type rotating shaft, 14 Scraper components. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] Reference Figure 1-4 A closed-loop geothermal circulation mining system includes a mine tunnel 1, an extraction mechanism installed in the mine tunnel 1, and an extraction pipe 2 on the extraction mechanism. The extraction mechanism can extract geothermal resources from the mine into an insulation shell assembly 9 for use. The extraction pipe 2 is provided with a cleaning mechanism at one end extending into the mine tunnel 1. The cleaning mechanism can ensure the stable flow of geothermal resources.

[0048] Reference Figure 1-4 The extraction mechanism includes a pump assembly 5 installed on one side of the upper end of the mine tunnel 1, an extraction pipe 2 running through the mine tunnel 1, a thermal insulation and sealing assembly 3 installed on the mine tunnel 1, and a thermal insulation pipe 4 sleeved on the extraction pipe 2, with the thermal insulation pipe 4 positioned between the pump assembly 5 and the thermal insulation and sealing assembly 3. The pump assembly 5 enables geothermal resources to be extracted through the extraction pipe 2 and can be transported stably. At the same time, the thermal insulation pipe 4 effectively provides insulation, preventing cooling due to contact between the extraction pipe 2 and the outside. The extraction pipe 2 can also extract hot air, hot steam, or hot water resources from the mine as needed.

[0049] Reference Figure 1-4The cleaning mechanism includes a mounting plate 10 located at the lower end of the mining pipe fitting 2. A filter cover assembly 11 is fixed on the mounting plate 10 and is fixedly connected to the lower end of the mining pipe fitting 2. An L-shaped rotating shaft 13 is rotatably sleeved on the mounting plate 10. The upper end of the L-shaped rotating shaft 13 extends into the mining pipe fitting 2. The horizontal end of the L-shaped rotating shaft 13 is located at the lower end of the mounting plate 10. A scraper 14 is fixed on the horizontal end of the L-shaped rotating shaft 13 and abuts against the outer side of the filter cover assembly 11. In actual operation, because the mining pipe fitting 2 generates negative pressure, hot air, hot steam, or hot water resources in the mine can flow towards the lower end of the mining pipe fitting 2, i.e., the filter cover assembly 11. These resources may contain impurities. When the gas or liquid flows, the stirring blade assembly 12 will drive the L-shaped rotating shaft 13 to rotate, which will enable the scraper 14 to clean the surface of the filter cover assembly 11 and ensure that the hot air, hot steam, or hot water resources in the mine can stably enter the mining pipe fitting 2.

[0050] Reference Figure 1-4 The extraction mechanism is connected to an insulated shell assembly 9; the insulated shell assembly 9 contains an insulation mechanism; the insulated shell assembly 9 contains an inner tank 99, and two partitions 93 are fixed at equal intervals from top to bottom inside the inner tank 99. A through pipe 95 is opened in the middle of the partition 93; the inner tank 99 is divided into three installation cavities by the two partitions 93, and each installation cavity is equipped with a coil assembly 98. The inner tank 99 is equipped with a connecting mechanism, and the connecting mechanism is equipped with a conveying pipe 92, which is connected to the extraction mechanism; by dividing into three installation cavities and ensuring that the installation cavities can exchange heat, the geothermal resources can first enter the lowest installation cavity to transfer the maximum heat to the heat exchange components inside the cavity. As the heat exchange medium increases, the medium with reduced heat will gradually rise into the two upper installation cavities. This can form a preheating at the inlet and high-temperature heating at the outlet, which can improve the efficiency and quality of geothermal use.

[0051] Reference Figure 1-4 The insulation mechanism includes a tank assembly 91, an insulation assembly 94 is fitted inside the tank assembly 91, an inner tank 99 is installed inside the insulation assembly 94, a conveying pipe 92 passes through the insulation assembly 94 and the tank assembly 91 and is connected to the pump assembly 5, and the conveying pipe 92 is located in the installation cavity at the lowest end; the insulation assembly 94 can effectively keep the heat out and prevent heat loss, making full use of geothermal energy to heat the material in the coil assembly 98, and the flow of the heat transfer medium is realized through the action of three coil assemblies 98 and two connecting pipes 96, thereby improving the heating effect.

[0052] Reference Figure 1-4The connection mechanism includes two connecting pipes 96 that pass through two partition plates 93. The two connecting pipes 96 are located between three coil assemblies 98 and are connected to the three coil assemblies 98. In actual use, the coil assembly 98 at the bottom is the first to come into contact with the hottest geothermal resource. As the geothermal resource continues to transfer, it can flow upward through the through pipe 95, and the heat is gradually consumed. That is, the uppermost coil assembly 98 is preheated by the low-temperature geothermal resource. The preheated medium falls into the middle coil assembly 98 and is heated by the medium-temperature geothermal resource. It enters the lowermost coil assembly 98 and is heated by the hottest geothermal resource. The heated medium can be output through the supply pipe 6 for use. The hot air or hot water output through the supply pipe 6 can be transferred to the power plant or used to heat and insulate corresponding equipment. In conventional schemes, water can be used as the medium, and the quality of the water can be adjusted to meet the corresponding usage requirements.

[0053] Reference Figure 1-4 The upper ends of the insulation mechanism and the inner tank 99 are connected by a suction pipe 8, and the lower end of the suction pipe 8 extends into the installation cavity located at the upper end. Waste or gas can be extracted and discharged through the suction pipe 8, and can be effectively filtered and purified.

[0054] Reference Figure 1-4 A water supply pipe 97 is connected to the uppermost coil assembly 98. The water supply pipe 97 passes through the inner tank assembly 99 and the insulation mechanism and extends to the outside of the insulation shell assembly 9; this facilitates the supply of heat transfer medium so that heat exchange can be carried out between the coil assembly 98 and the geothermal resources.

[0055] Reference Figure 1-4 A supply pipe 6 is connected to the coil assembly 98 at the bottom. The supply pipe 6 passes through the inner tank 99 and the insulation mechanism and extends to the outside of the insulation shell assembly 9; this facilitates the output of the heated heat transfer medium.

[0056] Reference Figure 1-4 The insulation mechanism and the inner tank 99 are connected by a discharge storage component 7, which is inclined and extends to the uppermost installation cavity. If there is liquid accumulation, it is easy to discharge and can purify and treat the liquid.

[0057] The present invention also proposes a method for closed-mine geothermal circulation mining, applicable to a closed-mine geothermal circulation mining system according to claims 1-9 above, comprising the following steps:

[0058] S1. Geothermal Location Confirmation in Mines: Conduct exploration inside closed mines to determine the location of geothermal energy within them;

[0059] S2, Geothermal Energy Concentration: By setting up thermal insulation and sealing components 3 to seal the geothermal energy environment, the geothermal energy can be prevented from dissipating;

[0060] S3, Geothermal Energy Exchange: Through the cooperation of pump assembly 5 and mining pipe fitting 2, geothermal energy in mine tunnel 1 can be extracted and transported into insulation shell assembly 9 through pump assembly 5. As geothermal energy enters the installation cavity at the lower end through delivery pipe 92, it can also enter the two installation cavities at the upper end through through pipe 95, which helps to make contact between geothermal energy and coil assembly 98 for heat exchange, and can raise the temperature of the medium in coil assembly 98.

[0061] S4. Medium flow: The heat exchange medium can be supplied to the coil assembly 98 through the water supply pipe fitting 97, and the coil assembly 98 located in the lower mounting cavity can be exposed to high temperature and high heat geothermal energy; and it can be discharged through the supply pipe 6 for use;

[0062] S5. Medium delivery: The medium can be supplied to the upper coil assembly 98 through the water supply pipe fitting 97, and can flow downward through the cooperation of the two connecting pipes 96 and the two coil assemblies 98 at the lower end, so as to gradually heat it, and the heated medium can be output through the supply pipe 6 for use.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A closed-loop geothermal circulation mining system, comprising a mine tunnel (1), characterized in that: An extraction mechanism is installed inside the mine tunnel (1), and a mining pipe fitting (2) is provided on the extraction mechanism. A cleaning mechanism is provided at one end of the mining pipe fitting (2) extending into the mine tunnel (1). The extraction mechanism is connected to a heat-insulating shell assembly (9); the heat-insulating shell assembly (9) is provided with a heat-insulating mechanism; the heat-insulating shell assembly (9) is provided with an inner tank (99), and two partitions (93) are fixed at equal intervals from top to bottom inside the inner tank (99), and a through pipe (95) is opened in the middle of the partition (93); The inner tank (99) is divided into three installation cavities by two partitions (93). Each installation cavity is equipped with a coil assembly (98). The inner tank (99) is provided with a connecting mechanism, and the connecting mechanism is provided with a conveying pipe (92). The conveying pipe (92) is connected to the extraction mechanism.

2. The closed-loop geothermal circulation mining system according to claim 1, characterized in that: The extraction mechanism includes a pump assembly (5) installed on one side of the upper end of the mine tunnel (1), the mining pipe (2) is installed through the mine tunnel (1), the mine tunnel (1) is equipped with a heat insulation and sealing assembly (3), the mining pipe (2) is fitted with a heat insulation pipe (4), and the heat insulation pipe (4) is located between the pump assembly (5) and the heat insulation and sealing assembly (3).

3. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: The cleaning mechanism includes a mounting plate (10) disposed at the lower end of the mining pipe (2), a filter cover assembly (11) fixed on the mounting plate (10), the filter cover assembly (11) being fixedly connected to the lower end of the mining pipe (2), an L-shaped rotating shaft (13) being rotatably sleeved on the mounting plate (10), the upper end of the L-shaped rotating shaft (13) extending into the mining pipe (2), the horizontal end of the L-shaped rotating shaft (13) being disposed at the lower end of the mounting plate (10), a scraper (14) being fixed on the horizontal end of the L-shaped rotating shaft (13), and the scraper (14) abutting against the outer side of the filter cover assembly (11).

4. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: The insulation mechanism includes a tank assembly (91), an insulation assembly (94) is fitted inside the tank assembly (91), an inner tank component (99) is installed inside the insulation assembly (94), a delivery pipe (92) passes through the insulation assembly (94) and the tank assembly (91) and is connected to the pump assembly (5), and the delivery pipe (92) is located in the installation cavity at the lowest end.

5. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: The connection mechanism includes two connecting pipes (96) that pass through two partitions (93), the two connecting pipes (96) being located between three coil assemblies (98), and the two connecting pipes (96) being connected to the three coil assemblies (98).

6. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: The upper ends of the insulation mechanism and the inner tank (99) are connected by a suction pipe (8), and the lower end of the suction pipe (8) extends into the mounting cavity located at the upper end.

7. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: A water supply pipe (97) is connected to the uppermost coil assembly (98), which passes through the inner tank assembly (99) and the insulation mechanism and extends to the outside of the insulation shell assembly (9).

8. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: A supply pipe (6) is connected to the coil assembly (98) at the bottom end. The supply pipe (6) passes through the inner tank (99) and the insulation mechanism and extends to the outside of the insulation shell assembly (9).

9. A closed-loop geothermal circulation mining system according to claim 1, characterized in that: The heat preservation mechanism and the inner tank (99) are jointly provided with a discharge storage component (7), which is inclined and extends to the uppermost mounting cavity.

10. A method for closed-loop geothermal circulation mining, applicable to the closed-loop geothermal circulation mining system of claims 1-9 above, characterized in that, Includes the following steps: S1. Geothermal Location Confirmation in Mines: Conduct exploration inside closed mines to determine the location of geothermal energy within them; S2, Geothermal energy accumulation: The geothermal energy environment is sealed by setting up thermal insulation and sealing components (3) to prevent geothermal energy from dissipating; S3, Geothermal Energy Exchange: Through the cooperation of the pump assembly (5) and the mining pipe (2), geothermal energy in the mine tunnel (1) can be extracted, and the geothermal energy is transported into the insulation shell assembly (9) through the pump assembly (5). As the geothermal energy enters the installation cavity at the lower end through the delivery pipe (92), it can also enter the two installation cavities at the upper end through the through pipe (95), which helps the geothermal energy and the coil assembly (98) to come into contact and exchange heat, and can make the medium in the coil assembly (98) heat up. S4, Medium Flow: The heat exchange medium can be supplied to the coil assembly (98) through the water supply pipe (97), and the coil assembly (98) located in the lower mounting cavity can be exposed to high temperature and high heat geothermal energy; and it can be discharged through the supply pipe (6) for use; S5. Medium delivery: The medium can be supplied to the upper coil assembly (98) through the water supply pipe fitting (97), and can flow downward through the cooperation of the two connecting pipes (96) and the two coil assemblies (98) at the lower end, so as to gradually heat it, and the heated medium can be output through the supply pipe (6) for use.

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