Deep mine heat damage prevention and control equipment and system

Abstract

The present invention relates to the technical field of mine heat damage control systems and equipment, and in particular to deep mine heat damage control equipment, including underground heat exchange equipment, surface heat exchange equipment, and a first pipe group and a second pipe group; the two ends of the first pipe group are respectively connected to the outlet of the underground heat exchange equipment and the inlet of the surface heat exchange equipment, and the two ends of the second pipe group are respectively connected to the inlet of the underground heat exchange equipment and the outlet of the surface heat exchange equipment. Through the above-mentioned method, the underground heat exchange equipment and the surface heat exchange equipment cooperate to exchange heat between the underground high temperature and the surface low temperature, and use a lower cost to further reduce the temperature of the underground tunnel and reduce the risk of mine heat damage. The overall resource consumption is less, and it is more energy-saving and environmentally friendly. At the same time, through a more reasonable pipeline setting, the overall heat exchange efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of mine heat damage control systems and equipment, and in particular to deep mine heat damage control equipment and systems. Background Art

[0002] As coal production increases, shallow resources are becoming less and less, and coal mining has gradually shifted from shallow mining to deep mining. As mining depth increases, ground temperature rises. Mine heat damage is becoming more and more serious, becoming one of the six major disasters alongside mine water, fire, gas, dust, and roof.

[0003] There are many environmental factors that cause the temperature in mines to rise, such as the surface atmosphere: the underground wind flow flows in from the surface, so the surface air temperature directly affects the air temperature in the mine. For example, ventilation compressors: during mine ventilation, the self-compression temperature rise of the fluid has a great influence on the parameters of the underground wind flow. According to statistics, for every 102 meters increase in the vertical depth of the shaft, the heat released by the air due to adiabatic compression increases its temperature by 1 degree. For example, heat dissipation from surrounding rocks: the surrounding rocks transfer heat to the wall of the shaft surface by conduction. For example, heat dissipation from electromechanical equipment: the installed capacity of machinery in coal mining working faces is getting larger and larger. The heat energy converted by electromechanical equipment is dissipated into the surrounding medium. The heat release of the mining machinery is one of the main reasons for the deterioration of the climate on the working face, which can increase the temperature of the wind flow by 5-6 degrees.

[0004] In the prior art, in order to solve the above technical problems, the methods generally adopted by those skilled in the art are: Ventilation and cooling: ventilation and cooling are carried out by improving the reasonable ventilation system, improving ventilation conditions, adjusting the ventilation of the heat tunnel, setting up an independent return air line, etc. Control the heat release of the heat source: insulate the tunnel, insulate the pipes and water flow, and reasonably place the heat source to reduce or improve the heat release of the heat source to the working surface. Individual protection: by wearing a cooling vest or a cooling cap. Although the above schemes all reduce heat damage in mines and are mature methods of heat damage prevention and control, there is still room for improvement in the comprehensive effect of heat damage control. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the main purpose of the present invention is to provide deep mine heat damage prevention and control equipment and system, so as to achieve comprehensive control of mine heat damage, reduce operating costs and improve heat damage control effects.

[0006] In order to solve the above technical problems, a deep mine heat damage prevention and control device includes an underground heat exchange device, an above-ground heat exchange device, a first pipe group and a second pipe group; two ends of the first pipe group are respectively connected to the outlet of the underground heat exchange device and the inlet of the above-ground heat exchange device, and two ends of the second pipe group are respectively connected to the inlet of the underground heat exchange device and the outlet of the above-ground heat exchange device.

[0007] The second pipe group includes an above-ground liquid working medium pipeline, an underground liquid working medium pipeline and a roadway liquid working medium pipeline; the above-ground liquid working medium pipeline, the underground liquid working medium pipeline and the roadway liquid working medium pipeline are connected in sequence;

[0008] The above-ground liquid working medium pipeline comprises an outer pipe and an inner pipe, and the gap between the outer pipe and the inner pipe is a liquid return gap;

[0009] An air groove is axially provided on the inner wall of the underground liquid working medium pipeline, the upper end of the air groove is matched with the air inlet end of the liquid return gap, and the outer wall of the underground liquid working medium pipeline is covered with a heat insulation layer;

[0010] The inner wall of the tunnel liquid working medium pipeline is a smooth surface, and the liquid outlet end of the tunnel liquid working medium pipeline is connected to the liquid inlet end of the underground heat exchange equipment.

[0011] Among them, the downhole heat exchange equipment includes: a liquid working fluid box, a liquid working fluid pipe, an air bag and a return pipe; the liquid working fluid box is connected to the liquid outlet end of the liquid working fluid pipeline in the tunnel through a connecting pipe; one end of the liquid working fluid pipe is connected to the liquid working fluid box, and the other end is connected to the air bag; one end of the return pipe is connected to the liquid working fluid box, and the other end is connected to the lowest point of the bottom of the air bag.

[0012] Among them, the liquid working medium tube includes a lower tube, a middle tube and an upper tube; the inner wall of the lower tube is a smooth inner wall, the tube wall of the middle tube is provided with a plurality of capillary grooves, the tube wall of the upper tube is provided with a capillary pattern, and each starting point of the capillary pattern is connected to the capillary groove.

[0013] Among them, the first pipe group includes an underground gaseous working fluid pipeline and an above-ground gaseous working fluid pipeline; the underground gaseous working fluid pipeline is connected to the above-ground gaseous working fluid pipeline; the underground gaseous working fluid pipeline is connected to the air bag, and the above-ground gaseous working fluid pipeline is connected to the well heat exchange equipment.

[0014] Among them, the above-ground heat exchange equipment includes a gaseous working fluid diversion pipe and a liquid working fluid collecting tank; the gaseous working fluid inlet of the gaseous working fluid diversion pipe is connected to the ground gaseous working fluid pipeline, and the liquid working fluid outlet of the gaseous working fluid diversion pipe is connected to the liquid working fluid collecting tank; the liquid working fluid outlet of the liquid working fluid collecting tank is connected to the ground liquid working fluid pipeline.

[0015] Among them, it also includes, heat pump unit, liquid tubular condensing tank and valve;

[0016] The heat pump unit comprises a condenser, an expansion valve, an evaporator and a compressor, wherein the condenser is connected to the expansion valve through a first pipeline, the expansion valve is connected to the evaporator through a first pipeline, the evaporator is connected to the compressor through a first pipeline, and the compressor is connected to the condenser through the first pipeline;

[0017] The evaporator is connected to the cooling liquid inlet of the liquid working medium collecting tank through a cold water pipe, and the cooling liquid outlet of the liquid working medium collecting tank is connected to the evaporator through a return water pipe;

[0018] The valve is installed on the return pipe;

[0019] The liquid tubular condensing box is connected to the water inlet of the condenser through a low-temperature water pipe, and the liquid tubular condensing box is connected to the water outlet of the condenser through a high-temperature return water pipe.

[0020] A deep mine heat damage prevention and control system, comprising: the above-mentioned deep mine heat damage prevention and control equipment, air inlet tunnel, air outlet tunnel, and working face tunnel;

[0021] One end of the working face tunnel is connected to the air inlet tunnel, and the other end is connected to the air outlet tunnel;

[0022] The underground heat exchange equipment of the deep mine heat damage prevention and control equipment is installed at the air inlet of the working face tunnel;

[0023] Fresh air flows from the air inlet tunnel into the air inlet of the working face tunnel, merges with the cold air formed by the underground heat exchange equipment and flows into the working face tunnel; the merged air flows out from the air outlet of the working face tunnel and becomes polluted air flow, which flows out through the air outlet tunnel.

[0024] Among them, it includes an auxiliary fan; the auxiliary fan is installed at the liquid working fluid pipe of the underground heat exchange equipment to blow the cold air at the liquid working fluid pipe into the working face tunnel.

[0025] Among them, it also includes a cold storage tunnel, which is arranged above the working face tunnel; the underground heat exchange equipment of the deep mine heat damage prevention and control equipment is installed in the cold storage tunnel; dampers are arranged at the outlets at both ends of the cold storage tunnel; the dampers are installed with cold air ducts, and a control valve is provided on the cold air duct, and the air outlet of the cold air duct is arranged at the air inlet of the working face tunnel.

[0026] In the embodiment of the present invention, the underground heat exchange equipment and the surface heat exchange equipment are used to exchange heat between the underground high temperature and the surface low temperature, so as to further reduce the underground tunnel temperature and reduce the risk of heat damage in the mine at a lower cost. The overall resource consumption is less, and it is more energy-saving and environmentally friendly. At the same time, through a more reasonable pipeline setting, the overall heat exchange efficiency is higher. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] See also Figure 1-10The deep mine heat damage prevention and control equipment includes an underground heat exchange equipment 1, an above-ground heat exchange equipment 2 and a first pipe group 3, a second pipe group 4, a heat pump unit 5 and a liquid tubular condenser box 6; the two ends of the first pipe group 3 are respectively connected to the outlet of the underground heat exchange equipment 1 and the inlet of the above-ground heat exchange equipment 2, and the two ends of the second pipe group 4 are respectively connected to the inlet of the underground heat exchange equipment 1 and the outlet of the above-ground heat exchange equipment 2.

[0034] like Figure 2 As shown, the downhole heat exchange equipment 1 includes: a liquid working fluid box 101, a liquid working fluid pipe 102, an air bag 103 and a return pipe 104; the liquid working fluid box 101 is connected to the liquid outlet end of the tunnel liquid working fluid pipeline 403 through a connecting pipe 111; one end of the liquid working fluid pipe 102 is connected to the liquid working fluid box 101, and the other end is connected to the air bag 103; one end of the return pipe 104 is connected to the liquid working fluid box 101, and the other end is connected to the lowest point of the bottom of the air bag 103, so that the liquid working fluid recovered from the bottom of the air bag 103 flows back into the liquid working fluid box 101.

[0035] like Figure 3 As shown, the liquid working medium tube 102 includes a lower tube 112, a middle tube 113 and an upper tube 114; the inner wall of the lower tube 112 is a smooth inner wall, the tube wall of the middle tube 113 is provided with a plurality of capillary grooves 115, and the tube wall of the upper tube 114 is provided with a capillary pattern 116, and each pattern starting point of the capillary pattern 116 is connected to the capillary groove 115. The function of the liquid working medium tube 102 is to exchange heat between the liquid working medium and the outside world, so that the outside temperature becomes lower, and the liquid working medium absorbs heat and evaporates to become gaseous and rise. The function of the capillary groove 115 is to absorb the liquid working medium on the lower tube 112 upward, and adsorb it onto the capillary pattern 116 through capillary action, so that the entire liquid working medium tube is moistened, thereby avoiding the problem that the lower end of the liquid working medium tube evaporates quickly, while the upper end cannot effectively dissipate heat due to too little or even no liquid working medium, thereby reducing the heat exchange efficiency of the overall liquid working medium tube.

[0036] like Figure 4As shown, the above-ground heat exchange equipment 2 includes a gaseous working medium diversion pipe 201 and a liquid working medium collecting tank 202; the gaseous working medium inlet of the gaseous working medium diversion pipe 201 is connected to the ground gaseous working medium pipeline 31, and the gaseous working medium in the ground gaseous working medium pipeline 31 flows into the gaseous working medium diversion pipe 201. The gaseous working medium diversion pipe includes a plurality of pipes, thereby diverting the gaseous working medium into each pipe, accelerating the heat dissipation of the gaseous working medium, and turning it into liquid after heat dissipation. The liquid working medium outlet of the gaseous working medium diversion pipe 201 is connected to the liquid working medium collecting tank 202, and the working medium that changes from gas to liquid naturally drops into the liquid working medium collecting tank 202 due to gravity and is collected; the liquid working medium outlet of the liquid working medium collecting tank 202 is connected to the above-ground liquid working medium pipeline 401, and due to the action of gravity, the liquid working medium flows from the liquid working medium collecting tank 202 into the above-ground liquid working medium pipeline 401 and flows underground.

[0037] The first pipe group 3 includes an underground gaseous working fluid pipeline 32 located in the ground and in the tunnel and an above-ground gaseous working fluid pipeline 31 located on the surface; the underground gaseous working fluid pipeline 32 is connected to the above-ground gaseous working fluid pipeline 31; the underground gaseous working fluid pipeline 32 is connected to the air bag 103, and the above-ground gaseous working fluid pipeline 31 is connected to the well heat exchange equipment 2.

[0038] like Figure 5-8 As shown, the second pipe group 4 includes an above-ground liquid working medium pipeline 401 laid on the ground, an underground liquid working medium pipeline 402 located underground and not passing from the underground into the tunnel, and a tunnel liquid working medium pipeline 403 located in the tunnel; the above-ground liquid working medium pipeline 401, the underground liquid working medium pipeline 402 and the tunnel liquid working medium pipeline 403 are connected in sequence; the above-ground liquid working medium pipeline 401 includes an outer pipe 411 and an inner pipe 421, and the gap between the outer pipe 411 and the inner pipe 421 is a liquid return gap 431; the inner wall of the underground liquid working medium pipeline 402 is axially provided with an air groove 412, and the air groove 412 The upper end is matched with the gas inlet end of the liquid return gap 431. As the underground liquid working medium pipeline goes deeper, the external temperature gradually rises, which inevitably causes part of the liquid working medium to absorb heat and gasify, thereby affecting the flow of the liquid working medium in the underground liquid working medium pipeline. If the diameter of the underground liquid working medium pipeline is too small, it will also cause the underground liquid working medium pipeline to be blocked, so that the liquid working medium cannot flow down smoothly. Since the liquid working medium often produces gaseous working medium at the pipe wall when it flows down, an air groove 412 is opened on the inner wall of the underground liquid working medium pipeline 402 for the gaseous working medium to flow upward. If there is not much gaseous working medium, it releases heat and liquefies on the way up to form liquid working medium, which merges with the liquid working medium in the pipeline. If there is too much gaseous working medium, it can rise to the liquid return gap 431 through the air groove 412 and flow out of the rising gap 431.

[0039] The outer wall of the underground liquid working fluid pipeline 402 is covered with an insulation layer 422 to minimize the excessive temperature of the underground liquid working fluid pipeline 402 caused by geothermal heat, thereby affecting the movement of the liquid working fluid; the inner wall of the tunnel liquid working fluid pipeline 403 is a smooth surface to facilitate the flow of liquid working fluid, and the liquid outlet end of the tunnel liquid working fluid pipeline 403 is connected to the liquid inlet end of the downhole heat exchange equipment to transport the liquid working fluid to the liquid working fluid box 101 in the downhole heat exchange equipment.

[0040] The heat pump unit 5 includes a condenser 51, an expansion valve 52, an evaporator 53 and a compressor 54. The condenser 51 is connected to the expansion valve 52 through a first pipe 55, the expansion valve 52 is connected to the evaporator 53 through a first pipe 55, the evaporator 53 is connected to the compressor 54 through the first pipe 55, and the compressor 54 is connected to the condenser 51 through the first pipe 55; the evaporator 53 is connected to the cooling liquid inlet 202 of the liquid working medium collecting tank through a cold water pipe 56, and the cooling liquid outlet of the liquid working medium collecting tank 202 is connected to the evaporator 53 through a return pipe 57; the valve 58 is installed on the return pipe 57; the liquid tubular condenser box 6 is connected to the water inlet of the condenser 51 through a low-temperature water pipe 61, and the liquid tubular condenser box 6 is connected to the water outlet of the condenser 51 through a high-temperature return pipe 62. When the ground temperature is too high and the underground temperature cannot be effectively lowered, the heat pump unit 5 and the liquid tubular condenser tank 6 cooperate to assist in cooling the liquid working medium base tank 202, so that the gaseous working medium is cooled and converted into liquid working medium.

[0041] The present invention also provides a deep mine heat damage prevention and control system, such as Fig. 9 As shown, it includes: the above-mentioned deep mine heat damage prevention and control equipment, an air inlet tunnel 1001, an air outlet tunnel 1002, a working face tunnel 1003, and a working face 1004.

[0042] The above-ground heat exchange equipment of deep mine heat damage prevention and control equipment is installed on the ground.

[0043] One end of the working face tunnel 1003 is connected to the air inlet tunnel 1001, and the other end is connected to the air outlet tunnel 1002;

[0044] The underground heat exchange device 1 of the deep mine heat damage prevention and control equipment is installed at the air inlet of the working face tunnel 1003;

[0045] Fresh air flows from the air inlet tunnel 1001 into the air inlet of the working face tunnel 1003, merges with the cold air formed by the underground heat exchange equipment 1 and flows into the working face tunnel 1003; the merged air flows out from the air outlet of the working face tunnel 1003 and becomes polluted air flow, which flows out through the air outlet tunnel 1002.

[0046] In an optional embodiment, an auxiliary fan 1005 is included; the auxiliary fan 1005 is installed at the liquid working fluid pipe of the underground heat exchange equipment to blow the cold air at the liquid working fluid pipe into the working face tunnel.

[0047] In another embodiment, if Fig.10 As shown, in order to utilize the cold air resources in winter and further reduce the temperature in summer, a cold storage tunnel 1006 is also included, and the cold storage tunnel is arranged above the working face tunnel 1003; the cold storage tunnel 1006 can be selected from shallow abandoned tunnels and sealed at both ends. The underground heat exchange equipment 1 of the deep mine heat damage prevention and control equipment is installed in the cold storage tunnel 1006; the outlets of the cold storage tunnel 1006 are provided with dampers; the dampers are installed with cold air ducts, and the cold air ducts are provided with control valves, and the air outlets of the cold air ducts are arranged at the air inlet of the working face tunnel. Therefore, when the cold air resources are abundant in winter, the cold air is transferred to the cold storage tunnel 1006, and the cold storage tunnel can also be frozen by sprinkling water to store cold resources. The cold storage tunnel is sealed in spring, and the cold storage tunnel is activated in summer, and the cold air in the cold storage tunnel is transferred to the working face tunnel through the cold air duct, thereby further reducing the temperature of the working face tunnel 1003. The pipe arrangement of the cold air duct, the installation of the damper, the shape of the damper, etc. are all prior arts, and those skilled in the art can install and construct them according to basic knowledge, which will not be elaborated here.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0050] Figure 1 It is a schematic diagram of the structure of the present invention;

[0051] Figure 2 This is a schematic diagram of the structure of the underground heat exchange equipment of the present invention;

[0052] Figure 3This is a schematic diagram of the liquid working medium pipe structure of the present invention;

[0053] Figure 4 This is a schematic diagram of the structure of the wellbore heat exchange equipment of the present invention;

[0054] Figure 5 This is a schematic diagram of the structure of the second tube group of the present invention;

[0055] Figure 6 This is a schematic diagram of the structure of the above-ground liquid working medium pipeline of the present invention;

[0056] Figure 7 This is a schematic diagram of the structure of the liquid working medium pipeline in the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of the liquid working medium pipeline in the laneway of the present invention;

[0058] Fig. 9 A schematic diagram of a deep mine heat damage prevention and control system according to the present invention;

[0059] Fig.10 It is a schematic diagram of another embodiment of the deep mine heat damage prevention and control system of the present invention.

Claims

1. A deep mine heat damage prevention and control device, comprising an underground heat exchange device, an above-ground heat exchange device, and a first pipe group and a second pipe group; the two ends of the first pipe group are respectively connected to the outlet of the underground heat exchange device and the inlet of the above-ground heat exchange device, and the two ends of the second pipe group are respectively connected to the inlet of the underground heat exchange device and the outlet of the above-ground heat exchange device, characterized in that: The second pipe group includes an above-ground liquid working medium pipeline, an underground liquid working medium pipeline and a roadway liquid working medium pipeline; the above-ground liquid working medium pipeline, the underground liquid working medium pipeline and the roadway liquid working medium pipeline are connected in sequence; The above-ground liquid working medium pipeline comprises an outer pipe and an inner pipe, and the gap between the outer pipe and the inner pipe is a liquid return gap; An air groove is axially provided on the inner wall of the underground liquid working medium pipeline, the upper end of the air groove is matched with the air inlet end of the liquid return gap, and the outer wall of the underground liquid working medium pipeline is covered with a heat insulation layer; The inner wall of the laneway liquid working medium pipeline is a smooth surface, and the liquid outlet end of the laneway liquid working medium pipeline is connected to the liquid inlet end of the downhole heat exchange equipment; The downhole heat exchange equipment comprises: a liquid working medium box, a liquid working medium pipe, an air bag and a liquid return pipe; the liquid working medium box is connected to the liquid outlet end of the liquid working medium pipe in the lane through a connecting pipe; one end of the liquid working medium pipe is connected to the liquid working medium box, and the other end is connected to the air bag; one end of the liquid return pipe is connected to the liquid working medium box, and the other end is connected to the lowest point of the bottom of the air bag, so that the liquid working medium recovered at the bottom of the air bag flows back to the liquid working medium box; The liquid working medium tube comprises a lower tube, a middle tube and an upper tube; the inner wall of the lower tube is a smooth inner wall, the tube wall of the middle tube is provided with a plurality of capillary grooves, the tube wall of the upper tube is provided with a capillary pattern, and each starting point of the capillary pattern is connected to the capillary groove; The above-ground heat exchange equipment comprises a gaseous working medium shunt pipe and a liquid working medium collecting tank; the gaseous working medium inlet of the gaseous working medium shunt pipe is connected to the above-ground gaseous working medium pipeline, the liquid working medium outlet of the gaseous working medium shunt pipe is connected to the liquid working medium collecting tank; the liquid working medium outlet of the liquid working medium collecting tank is connected to the above-ground liquid working medium pipeline; Also included are heat pump units, liquid tubular condensing tanks and valves; The heat pump unit comprises a condenser, an expansion valve, an evaporator and a compressor, wherein the condenser is connected to the expansion valve through a first pipeline, the expansion valve is connected to the evaporator through a first pipeline, the evaporator is connected to the compressor through a first pipeline, and the compressor is connected to the condenser through the first pipeline; The evaporator is connected to the cooling liquid inlet of the liquid working medium collecting tank through a cold water pipe, and the cooling liquid outlet of the liquid working medium collecting tank is connected to the evaporator through a return water pipe; The valve is installed on the return pipe; The liquid tubular condensing box is connected to the water inlet of the condenser through a low-temperature water pipe, and the liquid tubular condensing box is connected to the water outlet of the condenser through a high-temperature return water pipe.

2. The deep mine heat damage prevention and control equipment according to claim 1, characterized in that: The first pipe group includes an underground gaseous working fluid pipeline and an above-ground gaseous working fluid pipeline; the underground gaseous working fluid pipeline is connected to the above-ground gaseous working fluid pipeline; the underground gaseous working fluid pipeline is connected to the air bag, and the above-ground gaseous working fluid pipeline is connected to the well heat exchange equipment.

3. Deep mine heat damage prevention and control system, characterized in that: include: The deep mine heat damage prevention and control equipment, air inlet tunnel, air outlet tunnel, and working face tunnel as described in any one of claims 1 to 2; One end of the working face tunnel is connected to the air inlet tunnel, and the other end is connected to the air outlet tunnel; The underground heat exchange equipment of the deep mine heat damage prevention and control equipment is installed at the air inlet of the working face tunnel; Fresh air flows from the air inlet tunnel to the air inlet of the working face tunnel, merges with the cold air formed by the underground heat exchange equipment and flows into the working face tunnel; the merged air flows out from the air outlet of the working face tunnel and becomes polluted air flow, which flows out through the air outlet tunnel; It includes an auxiliary fan; the auxiliary fan is installed at the liquid working fluid pipe of the underground heat exchange equipment to blow the cold air at the liquid working fluid pipe into the working face tunnel.

4. The deep mine heat damage prevention and control system according to claim 3, characterized in that: It also includes a cold storage tunnel, which is arranged above the working face tunnel; the underground heat exchange equipment of the deep mine heat damage prevention and control equipment is installed in the cold storage tunnel; air gates are arranged at the outlets at both ends of the cold storage tunnel; the air gates are installed with cold air ducts, and a control valve is provided on the cold air duct, and the air outlet of the cold air duct is arranged at the air inlet of the working face tunnel.

Images