CN110593939A - Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method - Google Patents
Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method Download PDFInfo
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- CN110593939A CN110593939A CN201910942100.9A CN201910942100A CN110593939A CN 110593939 A CN110593939 A CN 110593939A CN 201910942100 A CN201910942100 A CN 201910942100A CN 110593939 A CN110593939 A CN 110593939A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
Abstract
The invention discloses a heat-damage mine coal face roadway heat-insulation and temperature-reduction system and a method, wherein the heat-damage mine coal face roadway heat-insulation and temperature-reduction system comprises the following steps: thermal-insulated layer, metal mesh layer, water supply pipe system, cooling tube, wet return. The invention isolates surrounding rocks around a roadway from transferring heat into the roadway by the heat-insulating layer, protects the heat-insulating layer by the compact metal net layer, and can reduce the radiation heat dissipation of a human body and the wall surface of the roadway, the water supply pipeline system is taken from ground low-temperature water for cooling, the temperature of the cooling pipe is reduced by cold water, then the temperature in the roadway and the temperature of the human body are reduced by utilizing the heat convection and the heat radiation of the fins on the cooling pipe, the cooling effect is realized from the two aspects of the heat convection and the heat radiation, in addition, the humidity of air in the roadway can be reduced by air condensation, and the invention provides the mine roadway cooling structure which has low dependence on ventilation equipment, low cost and good cooling effect, does not need to increase the investment of the ventilation equipment, can reduce the temperature.
Description
Technical Field
The invention relates to the field of temperature control of underground mine coal faces, in particular to a heat insulation and cooling system and a heat insulation and cooling method for a roadway of a coal face of a thermally damaged mine.
Background
As is known, the underground mine climate is influenced by various factors to form different mine climate conditions, the mine climate directly influences the working efficiency of mine workers, the biggest and most direct influence of the mine climate is the temperature and heat transmission and exchange between the mine workers and the surrounding environment, and the poor mine temperature can cause serious influence and harm to the mining work of the mine, namely, the mine thermal damage.
When the ambient temperature in the mine exceeds the temperature which can be tolerated by the normal heat balance of a human body, the phenomena of reduced labor efficiency, increased accident frequency, impaired health and even heatstroke shock are commonly called mine heat damage. In the mining and production process of the mine, workers generate heat due to work and work, meanwhile, heat exchange is also carried out between the workers and the surrounding environment, when the heat generated by a human body is balanced with the heat discharged out of the human body, namely, the heat generated is equal to the heat dissipation capacity, the human body feels comfortable, and the working efficiency is high; when the heat production quantity of the human body is less than the heat dissipation quantity of the mine environment, the human body feels cold; when the heat generated by the human body is larger than the heat dissipation capacity of the mine environment, the temperature of the human body rises, the human body feels sultriness, and the heat damage is formed.
In order to avoid the influence of heat damage on mine exploitation and the influence on the health and normal work of workers, people obtain certain results through research, and obtain some effective measures for preventing heat damage, such as: 1. mine underworkings cooling system (application number is CN201310375899.0), including insulator and corresponding ventilation system, separate tunnel wall and tunnel inner space through the insulator to form certain gap space between isolator and tunnel wall, utilize the isolator to keep apart in the gap space the heat that the tunnel wall transmitted, avoid it to influence the space in the tunnel, then through ventilation system, arrange the air in the gap space to the return airway, the heat is also taken away in the lump, and then realize thermal-insulated heat extraction, reduce mine temperature. 2. A roadway cooling and dehumidifying system (with application number being CN201810870163.3) for underground excavation of a high-temperature high-humidity mine divides a roadway space into an inner part and an outer part through an isolating body, and then a ventilation system is utilized to respectively perform ventilation cooling and dehumidifying operation, so that the operation environment of excavation of the roadway is effectively improved. 3. Mine country rock surface heat sink and mine cooling system (application number is CN201721683564.5), including gradient cooling board, forced air cooling circulation mechanism, cold wind cooling mechanism, the gradient cooling board is laid on the country rock surface, and forced air cooling circulation mechanism sets up in the gradient cooling board, and cold wind cooling mechanism is responsible for carrying cold wind, and through isolated country rock heat dissipation, improve cold wind utilization ratio, effectively improve the heat evil mine operational environment. 4. A roadway support cooling system and method for a thermally-damaged mine (application number is CN201710017712.8) are characterized in that a hollow anchor rod is used for roadway support, a cooling pipeline and a backflow pipeline are arranged around the anchor rod, a low-temperature heat exchange medium is continuously supplied to the cooling pipeline through a refrigerating device, and then the medium is conveyed into the hollow anchor rod, so that the heat exchange medium is continuously subjected to heat exchange with surrounding rocks of the roadway, the temperature of the surrounding rocks is reduced, the support effect is ensured, and the air temperature in the roadway is reduced.
The current mine cooling measures comprise the technologies provided in the four patents, the mine thermal damage is relieved to a certain extent, a certain mine temperature control result is obtained, and certain defects also exist: 1. the mine underground roadway cooling system (application number is CN201310375899.0) needs to ensure strict sealing performance of the whole heat insulation system, otherwise, the air volume of the roadway can be reduced when the heat insulation layer is pumped, in addition, the technology in the patents of the mine underground roadway cooling system (application number is CN201310375899.0), the underground tunneling roadway cooling and dehumidifying system of a high-temperature high-humidity mine (application number is CN201810870163.3), a mine surrounding rock surface cooling device and a mine cooling system (application number is CN201721683564.5) and other currently used technologies mostly depend on a ventilation system, so that extra ventilation equipment is required to be put into the system, the cost is increased, a certain influence can be caused on the normal ventilation of the mine, the burden of the ventilation system is increased, in addition, when the mechanical cold water cooling system of the current mine is used for cooling the coal face, the volumes of an air cooler, a local fan and an air cylinder are large, or the cold water terminal is used near the outer port of the working face machine lane, the air cooler is adopted for heat exchange and cooling, the coal face has long trend route, the surrounding rock temperature of the wall surface of the machine lane is high, the heat loss along the way is very serious, and the temperature is increased again when the cold air at the outer port of the machine lane reaches the lower port of the coal face, so the cooling effect on the coal face is poor, or a plurality of air coolers are arranged along the air intake lane, the section of the lane needs to be expanded at the installation position, and a local fan matched with the air cooler needs to be added, thereby greatly increasing the refrigeration cost and the engineering quantity; 2. the main factors causing heat damage include three aspects of temperature and humidity of wind flow and radiation heat exchange of human bodies, and currently adopted technologies comprise the four patents, the temperature of a mine is mostly reduced through convection heat exchange, and only one-sided cooling measures are adopted, so that the effect is limited and the optimization needs to be improved; 3. the mine underground roadway cooling system (application number is CN201310375899.0) and the underground tunneling roadway cooling and dehumidifying system (application number is CN201810870163.3) of a high-temperature and high-humidity mine form a gap space between an isolating body and a roadway wall, but the gap space needs to be supported by corresponding equipment to ensure the effective existence of the gap space, so that the investment cost is increased, the crack gap of the isolating body is not easy to find, the isolating body is influenced by mining, the roadway wall is not constant, if the roadway changes, the gap space can also change along with the change of the gap space, the problem is difficult to find and eliminate due to the existence of the isolating body, and the daily maintenance is difficult; 4. a large amount of equipment is required to be added into a mine surrounding rock surface cooling device and a mine cooling system (with the application number of CN201721683564.5), the system is complex and difficult to set, the cost is high, and once a roadway is slightly deformed due to mining influence, the system and the cooling effect of the system are influenced, and the daily maintenance is difficult; 5. in a thermal hazard mine roadway support cooling system and method (application number is CN201710017712.8), because the surrounding rock range is wider, and the surrounding strata can continuously conduct heat to the surrounding rocks around the roadway, the surrounding rock cooling is difficult to carry out through the patent, and then the cooling effect in the roadway is difficult to guarantee, and the anchor rod is a special anchor rod structure, is special and needs to be made, and an additional refrigerating device needs to be put into, so the equipment input cost and the operation cost are higher, the hollow cooling anchor rod is inserted into the surrounding rock, if the surrounding rock is deformed due to stress change, the hollow cooling anchor rod can be damaged, and the hollow cooling anchor rod is difficult to find in the surrounding rock, and the daily maintenance is difficult.
In summary, although the existing mine cooling technology has a certain effect, the existing mine cooling technology has defects, and aiming at the low cooling effect of the coal face, a roadway cooling structure which has low dependence on ventilation equipment, does not need to increase the investment of the ventilation equipment, can cool in multiple directions and angles, is convenient for daily maintenance, has low cost and good cooling effect is needed.
Disclosure of Invention
In order to solve the defects mentioned in the background art, the invention aims to provide a thermal damage mine coal face roadway heat insulation and cooling system and a thermal damage mine coal face roadway heat insulation and cooling method, which aim to solve the problems that the physical health and the working efficiency of workers are influenced due to higher environmental temperature in an underground mine, and the problems that the existing cooling technology excessively depends on a ventilation system and equipment, the investment cost is high, the cooling technology is single, the daily maintenance is inconvenient, and the cooling effect needs to be improved.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a thermal hazard mine coal face tunnel heat insulation cooling system, is including the cooling structure that is used for the mine tunnel, the cooling structure is including installing the insulating layer at the tunnel wall, and the insulating layer both sides end all wraps up has first waterproof layer, and the insulating layer is inlayed towards one side in the tunnel and is had the metal mesh layer.
And a water supply pipeline system, a cooling pipe and a water return pipe are laid at the side end of the metal mesh layer respectively, the water supply pipeline system is laid along the surface of the metal mesh layer, and the water supply pipeline system is communicated with the water inlet end of the cooling pipe.
The water supply pipe system comprises water supply pipe and heat preservation, and water supply pipe is the transport corridor of cooling water, and the outside parcel of water supply pipe has the heat preservation, and the heat preservation both sides wall has all wrapped up the second waterproof layer, and the heat preservation wraps up in water supply pipe's periphery, hugs closely water supply pipe's outside surface.
The water outlet end of the cooling pipe is communicated with the water return pipe, the cooling pipe comprises a pipe body and fins, the pipe body is a water delivery channel of the cooling pipe, the fins are embedded on the outer surface of the pipe body, and the fins are embedded on the outer surface of the pipe body of the cooling pipe.
Furthermore, the heat insulation layer is made of flexible heat insulation materials and is arranged close to the wall surface of the roadway, and the heat insulation layer covers the two side wall surfaces and the top surface of the roadway wall.
Furthermore, the metal net layers are embedded on the surfaces of the heat insulation layers on the two side wall surfaces of the roadway and face the space in the roadway.
Furthermore, the water pipeline system is a supply device for water for the cooling structure, the water supply pipeline system is connected with a water supply pipeline for underground water to supply water, and the water supply pipeline system supplies cooling water to the cooling pipe.
Furthermore, the cooling pipes are arranged in a U shape and laid on the metal mesh layer.
Furthermore, the heat insulation layer and the heat preservation layer are both made of flexible materials, polyurethane materials are used for heat insulation and heat preservation, and the first waterproof layer and the second waterproof layer are made of polyvinyl chloride for water prevention.
Furthermore, the edges and corners of the fins are in a gentle arc shape, the fins are perpendicular to the wall of the tunnel, and the fins cover the surface of the metal mesh layer.
Furthermore, the water return pipe is a water return pipeline with a cooling structure and is laid on the surface of the metal mesh layer.
A cooling method of a thermal damage mine coal face roadway heat insulation cooling system comprises the following steps:
1) the heat insulating layer isolates the heat transferred from the high temperature of the tunnel wall to the space in the tunnel, and the convection heat exchange between the tunnel wall and the tunnel air flow is avoided, so that the temperature of the air flow in the tunnel is reduced, and the convection heat dissipation capacity q of the human body is increasedd；
2) The cooling pipe is carried to the cold water that the water supply pipeline system was used of will cooling, and cold water flows through the cooling pipe and flows into the wet return, and cold water is at the intraductal in-process that flows of cooling, and cold water makes the fin temperature reduce through heat-conduction in the body of cooling pipe, and the surface area of fin is big, and the heat convection effect is obvious, has reduced the temperature of tunnel air, and then has improved human convection heat dissipation capacity qd；
3) The fins are arranged and covered on the surface of the metal mesh layer, so that the temperature of the surface of the metal mesh layer is further reduced, and further the radiation heat exchange quantity q of the human body to the metal mesh layer is enabled to befAnd is increased.
The invention has the beneficial effects that:
1. according to the invention, the wall surface of the roadway is isolated from direct contact with the airflow through the heat insulation layer, so that heat transfer from high-temperature surrounding rock to the airflow is reduced, and the cooling effect is improved;
2. the heat-insulating layer on the periphery of the water supply pipeline ensures the temperature of the supplied cold water, and the fins embedded in the cooling pipe increase the convection heat exchange between the air flow and the cold water in the pipe body of the cooling pipe, play an active role in reducing the temperature of the air flow, and have obvious cooling effect;
3. according to the invention, because the surface temperature of the metal net layer is low and the coverage area is wide, the radiation heat exchange between the human body and the metal net layer is obviously increased, so that the radiation heat dissipation of the human body is directly increased, the cooling is carried out through the radiation heat dissipation, and the multi-angle and multi-aspect cooling is realized without only depending on ventilation cooling;
4. the roadway cooling is realized in multiple angles and multiple aspects, the dependence on a ventilation system is reduced, ventilation equipment is not required to be added, the investment cost is reduced, the ventilation condition of a mine is not changed, the ventilation load is not added to the ventilation system of the mine, and the adverse effect on the ventilation system is avoided;
5. the heat insulation layer is made of flexible materials, can be changed along with roadway deformation to a certain extent, is high in applicability, the states of all the parts are easy to observe, abrasion and faults of all the parts can be found in time, maintenance is carried out in time, and daily maintenance is convenient and fast.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a structure of the present invention;
FIG. 2 is a cross-sectional layout of the invention deployed in a roadway;
FIG. 3 is a schematic front view of the structure of the present invention;
FIG. 4 is a schematic sectional view of a water supply piping system according to the present invention;
FIG. 5 is a schematic view of a vertical cross-section of a cooling tube according to the present invention;
FIG. 6 is a schematic diagram of a horizontal cross-sectional structure of the cooling tube according to the present invention.
Reference numbers in the figures: 1-insulating layer, 12-first waterproof layer, 2-metal mesh layer, 3-water supply pipeline system, 4-cooling pipe, 5-wet return, 6-tunnel road wall, 7-water supply pipeline, 8-heat preservation layer, 81-second waterproof layer, 9-body, 10-fin, 11-cooling structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
A thermal hazard mine coal face roadway heat insulation and cooling system is shown in figures 1 and 2 and comprises a cooling structure 11 for a mine roadway, wherein the cooling structure 11 comprises a heat insulation layer 1 installed on the wall surface of a roadway wall 6, two side ends of the heat insulation layer 1 are wrapped by first waterproof layers 12, the heat insulation layer 1 is made of flexible heat insulation materials, polyurethane materials are used for heat insulation, and the heat insulation layer is arranged close to the wall surface of the roadway. The first waterproof layer 12 is made of polyvinyl chloride for waterproofing, the heat insulation layer 1 is easy to lose efficacy after a long time because the roadway and the wall surface are wet, and the polyvinyl chloride has waterproof and antistatic functions and high fire-resistant grade.
The heat insulation layer 1 covers the two side wall surfaces and the top surface of the roadway wall 6, a metal mesh layer 2 is embedded on one side of the heat insulation layer 1 facing the roadway, and the metal mesh layer 2 is embedded on the surface of the heat insulation layer 1 on the two side wall surfaces of the roadway and faces the space in the roadway.
As shown in fig. 1 and 3, a water supply pipeline system 3, a cooling pipe 4 and a water return pipe 5 are respectively laid at the side end of the metal mesh layer 2, the water supply pipeline system 3 is a water supply device for the cooling structure 11, the water supply pipeline system 3 is connected with a water supply pipeline for underground water, the water supply pipeline system 3 is laid on the surface of the metal mesh layer 2, the water supply pipeline system 3 is communicated with the water inlet end of the cooling pipe 4, the water supply pipeline system 3 supplies cooling water to the cooling pipe 4, and the cooling pipe 4 is arranged in a U shape and laid on the metal mesh layer 2.
The heat insulation layer 1, the metal mesh layer 2, the water supply pipeline system 3 and the water return pipe 5 are all fixed on the wall surface of the roadway wall 6 through anchor rods.
As shown in fig. 3 and 4, the water supply pipeline system 3 is composed of a water supply pipeline 7 and a heat insulation layer 8, the water supply pipeline 7 is a transportation channel for cooling water, and is communicated with the cooling pipe 4, and is also communicated with the water inlet end of the water supply pipeline system 3 and the cooling pipe 4. The outside parcel of water supply pipe 7 has heat preservation 8, and 8 both sides walls of heat preservation have all wrapped up second waterproof layer 81, and heat preservation 8 wraps up in the periphery of water supply pipe 7, hugs closely the outside surface of water supply pipe 7. The heat preservation layer 8 is made of flexible heat preservation materials, the polyurethane materials are used for heat preservation, the second waterproof layer 81 is made of polyvinyl chloride for water prevention, the heat preservation layer 8 is prone to failure after a long time due to the fact that a roadway and a wall surface are wet, the polyvinyl chloride has the functions of water prevention and static electricity prevention, the fire resistance level is high, and the heat preservation materials and the waterproof materials are adopted for the coal mine underground cooling pipe at present.
As shown in fig. 3, 5 and 6, the water outlet end of the cooling pipe 4 is communicated with the water return pipe 5, the cooling pipe 4 comprises a pipe body 9 and fins 10, the pipe body 9 is a water delivery channel of the cooling pipe 4, the fins 10 are embedded on the outer surface of the pipe body 9, and the fins 10 are embedded on the outer surface of the pipe body of the cooling pipe. The edges and corners of the fins 10 are gentle arc shapes, the fins 10 are perpendicular to the roadway wall 6, and the fins 10 cover the surface of the metal mesh layer 2.
The water return pipe 5 is a water return pipeline of the cooling structure 11 and is laid on the surface of the metal mesh layer 2.
The heat insulation layer 1, the metal mesh layer 2, the water supply pipeline system 3, the cooling pipe 4 and the water return pipe 5 jointly form a cooling structure 11.
When the ambient temperature in the mine exceeds the temperature which can be tolerated by the normal heat balance of a human body, the phenomena of reduced labor efficiency, increased accident frequency, impaired health and even heatstroke shock are commonly called mine heat damage. The human body heat balance relation is as follows: q. q.sch＝qm-qw-qd-qz-qf
In the formula: q. q.smThe heat produced in the metabolism process of the human body depends on the activity of the human body; q. q.swHeat consumed by the human body for doing work, qm-qwExcess heat that must be removed from the body; q. q.sdThe human body convection heat dissipation quantity is related to the temperature of air, and is positive when the temperature of the air is lower than the surface temperature of the human body, and is negative otherwise; q. q.szFor evaporation of sweat and evaporation of exhaled waterThe heat brought by the air is related to the humidity of the air, if the humidity of the air is high, sweat of a human body is difficult to evaporate, the effect of evaporation and heat dissipation cannot be achieved, and the human body feels sultry; q. q.sfIs the net amount of radiative heat transfer between the body and the surface of the surrounding object, which may be positive or negative, and which is related to the temperature of the surface of the surrounding object, which is negative if the temperature of the surface of the surrounding object is higher than the body temperature; q. q.schWithout energy being discharged outside the body for conversion by heat.
When the human body is in thermal equilibrium, qchWhen the heat balance is kept, the human body feels comfortable; when the heat balance is lost, if q is lostchIf the temperature is less than 0, the body temperature of the human body is reduced and the human body feels cold; if q ischIf the temperature is higher than 0, the body temperature of the human body rises, the human body feels stuffy and hot, and then heat damage is formed. Therefore, as can be seen from the human body heat balance formula, the factors causing the heat damage on the coal mining working face mainly include three aspects of the temperature and the humidity of the wind flow and the radiation heat exchange of the human body.
The cooling method implemented and operated on site in the invention comprises the following steps:
the heat insulation layer 1 isolates the heat transferred from the high temperature of the tunnel wall 6 to the space in the tunnel, and avoids the convection heat exchange between the tunnel wall 6 and the tunnel air current, so that the temperature of the air current in the tunnel is reduced, and the convection heat dissipation capacity q of the human body is increasedd；
The cooling pipe 4 is carried to the cold water that water supply pipe system 3 was used of cooling, and cold water flows through cooling pipe 4 and flows into wet return 5, and cold water flows the in-process in cooling pipe 4, and cold water makes fin 10 temperature reduction through heat-conduction in the body 9 of cooling pipe 4, and the surface area of fin 10 is big, and the heat convection effect is obvious, has reduced the temperature of tunnel air, and then has improved human convection heat dissipation capacity qdMeanwhile, the fins 10 are arranged and covered on the surface of the metal mesh layer 2, so that the temperature of the metal mesh layer is reduced, and further the radiation heat exchange quantity q of the human body to the metal mesh layer is enabled to be qfIncreasing; by increasing the convective heat dissipation q of the human bodydHeat exchange quantity q to radiation of human bodyfTo achieve cooling.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (9)
1. A thermal hazard mine coal face roadway heat insulation and cooling system comprises a cooling structure (11) for a mine roadway, and is characterized in that the cooling structure (11) comprises a heat insulation layer (1) arranged on the wall surface of a roadway wall (6), two side ends of the heat insulation layer (1) are respectively wrapped with a first waterproof layer (12), and one side, facing the roadway, of the heat insulation layer (1) is embedded with a metal mesh layer (2);
a water supply pipeline system (3), a cooling pipe (4) and a water return pipe (5) are respectively laid at the side end of the metal mesh layer (2), the water supply pipeline system (3) is laid along the surface of the metal mesh layer (2), and the water supply pipeline system (3) is communicated with the water inlet end of the cooling pipe (4);
the water supply pipeline system (3) is composed of a water supply pipeline (7) and an insulating layer (8), the water supply pipeline (7) is a transportation channel for cooling water, the insulating layer (8) is wrapped outside the water supply pipeline (7), two side walls of the insulating layer (8) are wrapped with second waterproof layers (81), and the insulating layer (8) is wrapped on the periphery of the water supply pipeline (7) and is tightly attached to the outer side surface of the water supply pipeline (7);
the water outlet end of the cooling pipe (4) is communicated with the water return pipe (5), the cooling pipe (4) comprises a pipe body (9) and fins (10), the pipe body (9) is a water delivery channel of the cooling pipe (4), the fins (10) are embedded on the outer surface of the pipe body (9), and the fins (10) are embedded on the outer surface of the pipe body of the cooling pipe.
2. The roadway heat insulation and temperature reduction system for the thermally-damaged mine coal face is characterized in that the heat insulation layer (1) is made of flexible heat insulation materials and is arranged close to the wall surface of the roadway, and the heat insulation layer (1) covers the two side wall surfaces and the top surface of the roadway wall (6).
3. The roadway heat insulation and temperature reduction system for the coal face of the thermally damaged mine is characterized in that the metal mesh layers (2) are embedded on the surfaces of heat insulation layers (1) on two side wall surfaces of the roadway and face the space in the roadway.
4. The roadway heat insulation and temperature reduction system for the coal face of the thermally damaged mine is characterized in that the water pipeline system (3) is a water supply device for the temperature reduction structure (11), the water supply pipeline system (3) is connected with a water supply pipeline of underground water to supply water, and the water supply pipeline system (3) supplies water for temperature reduction to the temperature reduction pipe (4).
5. The roadway heat-insulating and cooling system for the coal face of the thermally damaged mine is characterized in that the cooling pipes (4) are arranged in a U shape and laid on the metal mesh layer (2).
6. The roadway heat insulation and temperature reduction system for the thermally damaged mine coal face is characterized in that the heat insulation layer (1) and the heat preservation layer (8) are both made of flexible materials, polyurethane materials are used for heat insulation and temperature preservation, and the first waterproof layer (12) and the second waterproof layer (81) are made of polyvinyl chloride for water prevention.
7. The roadway heat insulation and temperature reduction system for the thermally damaged mine coal mining working face according to claim 1, characterized in that the edges and corners of the ribs (10) are in gentle arc shapes, the ribs (10) are perpendicular to the roadway wall (6), and the ribs (10) cover the surface of the metal mesh layer (2).
8. The roadway heat insulation and temperature reduction system for the coal face of the thermally damaged mine is characterized in that the water return pipe (5) is a water return pipeline of a temperature reduction structure (11) and is laid on the surface of the metal mesh layer (2).
9. A cooling method of a roadway heat-insulating and cooling system of a heat damage mine coal face is characterized by comprising the following steps:
1) the heat insulation layer (1) isolates the heat transferred from the high temperature of the roadway wall (6) to the space in the roadway, and the convection heat exchange between the roadway wall (6) and the airflow in the roadway is avoided, so that the temperature of the airflow in the roadway is reduced, and the convection heat dissipation capacity q of a human body is increasedd；
2) The cooling pipe (4) is carried to the cold water of cooling usefulness in water supply pipeline system (3), cold water flows through cooling pipe (4) and flows into wet return (5), cold water flows the in-process in cooling pipe (4), cold water makes fin (10) temperature reduction through heat-conduction in body (9) of cooling pipe (4), the surface area of fin (10) is big, the heat convection effect is obvious, the temperature of tunnel air has been reduced, and then human convection heat dissipation capacity q has been improvedd；
3) The fins (10) are arranged and covered on the surface of the metal mesh layer (2), so that the temperature of the surface of the metal mesh layer (2) is further reduced, and further the radiation heat exchange quantity q of a human body to the metal mesh layer (2)fAnd is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942100.9A CN110593939A (en) | 2019-09-30 | 2019-09-30 | Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942100.9A CN110593939A (en) | 2019-09-30 | 2019-09-30 | Heat-damage mine coal face roadway heat-insulation and temperature-reduction system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110593939A true CN110593939A (en) | 2019-12-20 |
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| CN111044564A (en) * | 2020-01-07 | 2020-04-21 | 安徽理工大学 | Multifunctional mine roadway inner wall cooling effect testing device and operation method thereof |
| CN111271112A (en) * | 2020-03-03 | 2020-06-12 | 安徽理工大学 | Multifunctional mine well wall cooling device and cooling method |
| CN112145218A (en) * | 2020-09-30 | 2020-12-29 | 辽宁工程技术大学 | System and method for treating thermal damage of underground coal face |
| CN112414194A (en) * | 2020-11-23 | 2021-02-26 | 青岛理工大学 | Equipment module, system and method for treating underground space thermal pollution |
| CN114198144A (en) * | 2021-11-10 | 2022-03-18 | 中国矿业大学(北京) | Multi-unit water cooling structure and method for longwall mining working face |
| CN116927853A (en) * | 2023-07-19 | 2023-10-24 | 安徽理工大学 | High-ground-temperature tunnel cooling system and method |
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| CN111044564A (en) * | 2020-01-07 | 2020-04-21 | 安徽理工大学 | Multifunctional mine roadway inner wall cooling effect testing device and operation method thereof |
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| CN111271112B (en) * | 2020-03-03 | 2021-10-15 | 安徽理工大学 | Multifunctional mine well wall cooling device and cooling method |
| CN112145218A (en) * | 2020-09-30 | 2020-12-29 | 辽宁工程技术大学 | System and method for treating thermal damage of underground coal face |
| CN112414194A (en) * | 2020-11-23 | 2021-02-26 | 青岛理工大学 | Equipment module, system and method for treating underground space thermal pollution |
| CN114198144A (en) * | 2021-11-10 | 2022-03-18 | 中国矿业大学(北京) | Multi-unit water cooling structure and method for longwall mining working face |
| CN116927853A (en) * | 2023-07-19 | 2023-10-24 | 安徽理工大学 | High-ground-temperature tunnel cooling system and method |
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