Deep high-temperature roadway thermal environment similar simulation experiment device and method
By designing a similar simulation experimental device for thermal environment in deep high-temperature tunnels, the problem of high-temperature heat damage in deep high-temperature tunnels is solved, and the effective simulation of the thermal environment in deep high-temperature tunnels is achieved, helping to formulate cooling measures to ensure safe mining of mines.
Patent Information
- Application Number
- CN202510104200.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-05-06
AI Technical Summary
The high-temperature heat damage problems in deep high-temperature tunnels affect the normal production and safe mining of mines.
A experimental device for thermal environment similarity simulation of deep high-temperature tunnels is designed, including surrounding rock main device, surrounding rock similar simulation materials, temperature control system, wind flow control system and data acquisition system, through these systems, the thermal environment of deep high-temperature tunnels is simulated similarly.
It has realized the effective simulation of the thermal environment of deep high-temperature tunnels, and can explore the thermal insulation effect of the thermal spray layer and the influence of surrounding rock temperature field changes, help formulate cooling measures to ensure safe mining of mines.
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Figure CN119936354A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mine environment experiments, and specifically relates to a deep high-temperature tunnel thermal environment similarity simulation experiment device and method. Background Art
[0002] As the depth of mining increases, more difficult technical problems will become more and more prominent, such as high ground pressure, deep high temperature and high osmotic pressure (commonly known as the "three highs") and other problems. These phenomena rarely occur in shallow mining. Once entering deep mining, the "three highs" problem will have a great negative impact on the normal production of the mine. Among them, the high temperature heat damage caused by deep high temperature is particularly prominent.
[0003] Therefore, understanding the thermal environment of deep high-temperature tunnels and taking effective cooling measures are important means to ensure safe mining, and also have a guiding role in the convective heat transfer laws between tunnel surrounding rocks and wind flow. Summary of the invention
[0004] The purpose of the present invention is to provide a similar simulation experimental device and method for the thermal environment of a deep high-temperature tunnel, which can perform similar simulation of the thermal environment of a deep high-temperature tunnel through a physical device, and can establish an experimental method based on the similar simulation experimental device for the thermal environment of a deep high-temperature tunnel.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: In the first technical solution, a deep high-temperature tunnel thermal environment similarity simulation experimental device includes: a surrounding rock main body device, used to simulate the thermal environment of the surrounding rock of a mine tunnel; a surrounding rock similarity simulation material, which is arranged inside the surrounding rock main body device, and a tunnel is arranged in the middle of the surrounding rock similarity simulation material; a surrounding rock temperature control system, which is arranged inside the surrounding rock main body device and is used to control the temperature of the surrounding rock similarity simulation material; an airflow control system, which is arranged on the outside of the surrounding rock main body device, and the airflow control system includes an air outlet end, and the air outlet end of the airflow control system is connected to one section of the tunnel, and the airflow control system is used to provide the tunnel with air with constant temperature, humidity and air volume; a data acquisition system, which is arranged on the outside of the surrounding rock main body device, and the data acquisition system is electrically connected to the surrounding rock temperature control system and the airflow control system, and is used to monitor and collect data from the simulation experiment.
[0006] In the first technical solution, preferably, the surrounding rock main body device includes: a surrounding rock mold; a plurality of plates, arranged on the inner side of the surrounding rock mold, for building the boundary wall of the surrounding rock mold; a plurality of insulation boards, arranged on the inner side of the plates, and avoidance openings are provided on the insulation boards on both sides of the tunnel, and the positions and shapes of the two avoidance openings match the two ends of the tunnel.
[0007] In the first technical solution, preferably, the surrounding rock similar simulation material includes: a plurality of first building blocks, which are arranged in a matrix shape inside the surrounding rock main body device, and there is a gap between two adjacent first building blocks; a plurality of second building blocks, wherein the plurality of second building blocks are arranged in a straight line and horizontally and fit tightly, the second building block is arranged at the center of the plurality of first building blocks, and there is a gap between the second building block and the first building block, the tunnel passes through the plurality of second building blocks and is embedded in the center of the plurality of second building blocks, and the first building block and the second building block are both made of rock material; and crack material, which is filled in the gap between the adjacent plurality of first building blocks and in the gap between the first building block and the second building block, and the strength of the crack material is lower than the strength of the rock material.
[0008] In the first technical solution, preferably, the surrounding rock temperature control system includes: a plurality of heating cables, evenly distributed between the insulation board and the surrounding rock similar simulation material; an AC contactor, arranged on the outside of the surrounding rock main body device, the heating cable is electrically connected to the AC contactor; a temperature controller, arranged on the outside of the surrounding rock main body device, the temperature controller is electrically connected to the AC contactor.
[0009] In the first technical solution, preferably, the wind flow control system includes: a constant temperature and humidity machine; a blower, the air inlet of the blower is connected to the air outlet of the constant temperature and humidity machine through a first air duct, and the air outlet of the blower is connected to one end of the alley through a second air duct.
[0010] In the first technical solution, preferably, the data acquisition system includes: a data collector; a computer, the computer is electrically connected to the data collector; a plurality of temperature probes, the plurality of temperature probes are distributed in a matrix shape and are all located in the same horizontal plane, the temperature probes are located at the same height as the axial middle position of the second building block, and in the length extension direction of the tunnel, the plurality of temperature probes form four monitoring sections, the temperature probes are electrically connected to the temperature controller and the data collector; three wind speed sensors are respectively arranged at the openings on both sides of the tunnel and the air outlet of the constant temperature and humidity machine, the wind speed sensors are electrically connected to the data collector; five humidity sensors are respectively arranged at the openings on both sides of the tunnel, the air outlet of the constant temperature and humidity machine, the air inlet of the blower and the air outlet of the blower, and the humidity sensors are electrically connected to the data collector.
[0011] In the second technical solution, a method for using a deep high-temperature tunnel thermal environment similarity simulation experimental device, using the deep high-temperature tunnel thermal environment similarity simulation experimental device as described in the first technical solution, includes the following steps: step one, open the data acquisition system, check whether the data acquisition line connection is intact, and calibrate and set the sensor; step two, install the tunnel air inlet section and the blower, use the first air duct, the second air duct and the blower to connect the tunnel air inlet section and the constant temperature and humidity machine, and use cotton cloth to insulate the air inlet pipe and seal the gap at the connection of the air flow control system; step three, connect the electrode of the heating cable to the output electrode of the power supply of the AC contactor, open the AC contactor The contactor power supply detects the working state of the heating cable through the current value and the voltage value; Step 4, the outermost boundary of the simulated tunnel surrounding rock is used as the temperature control point, and the upper and lower limits of the temperature control point are set, wherein the upper limit is set to the original rock temperature, and the lower limit is 0.2°C lower than the upper limit. When the temperature exceeds the upper limit of the control point, the heating is automatically terminated, and when the temperature is lower than the lower limit of the control point, the heating program is automatically started; Step 5, the heating mode is set to automatic control steady-current heating, the soft start time is set to 10s, the output current is set to step reduction mode, the output current range is 300A-100A, the decrement value is 50A, and each heating time is 2h; Step 6, start the heating program, and wait until the temperature of all measuring points in the simulated tunnel surrounding rock is close to the original rock temperature , the heating mode is adjusted to manual control steady-current heating, the current is adjusted to 100A, and the temperature change trend of each measuring point is observed; step seven, the approximation method is used to repeatedly adjust the current within the range of 20A-100A to find a current value that makes the outer boundary temperature of the simulated tunnel surrounding rock basically unchanged, until the temperature of all measuring points in the simulated tunnel surrounding rock is basically stable; step eight, keep warm for 6h-8h, observe the temperature of each measuring point in the simulated tunnel surrounding rock, if the temperature fluctuation amplitude is relatively large, continue to use the approximation method in step seven to find a stable current, until the current and voltage that make the outer boundary temperature of the simulated tunnel surrounding rock unchanged are found, so that the heat dissipation power of the equipment in the laboratory environment can be obtained; step nine, after the temperature of all measuring points is constant, turn on the constant temperature and humidity machine and the blower, Adjust the wind temperature to 20℃, humidity to 20%, wind speed to 7m / s, and supply air to the tunnel until the temperature of the outermost boundary of the surrounding rock drops to 36.6℃; Step 10, stop the operation of the constant temperature and humidity machine and the blower, save the data, and enter the heating stage of the next set of tests; Step 11, repeat steps 4 to 10, and conduct tests with wind speeds of 5m / s-8m / s respectively, until the temperature of the outermost boundary of the surrounding rock drops to 36.6℃; Step 12, repeat steps 4 to 9, and conduct tests with a wind speed of 5m / s and a wind temperature of 10℃; Step 13, repeat steps 4 to 10, and adjust the original rock temperature to 38℃ and 39℃, adjust the wind speed to 7m / s, and the wind temperature to 20℃, until the temperature of the outermost boundary of the surrounding rock drops to 37.6℃ and 38.6℃, end a set of tests; Step 14, turn off the heating power, sort out the data, and end the test.
[0012] In the second technical solution, preferably, the thermal conductivity, ventilation wind speed, ventilation time and original rock temperature of similar materials in the simulation experiment in a high temperature environment are obtained, and the geometric similarity ratio between the tunnel and the simulation experiment device is obtained; based on the geometric similarity ratio and the thermal conductivity, ventilation wind speed, ventilation time and original rock temperature of similar materials in the tunnel, the thermal conductivity, ventilation wind speed, ventilation time and original rock temperature of similar materials in the actual surrounding rock tunnel are calculated.
[0013] In the second technical solution, preferably, the thermal conductivity of the similar material of the tunnel is equal to the thermal conductivity of the rock mass of the actual surrounding rock tunnel, the ventilation wind speed of the tunnel is multiplied by the geometric similarity ratio to obtain the ventilation wind speed of the actual surrounding rock tunnel, the ventilation wind speed of the tunnel is multiplied by the square of the geometric similarity ratio to obtain the ventilation time of the actual surrounding rock tunnel, and the surrounding rock temperature of the tunnel is equal to the original rock temperature of the actual surrounding rock tunnel.
[0014] In the second technical solution, preferably, the heating cable is electrically connected to the temperature controller and is independently controlled by the temperature controller, so as to simulate different thermal environments of deep surrounding rock tunnels by changing the surrounding rock temperature.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The present invention uses a physical device to simulate the thermal environment of a deep high-temperature tunnel, and can establish an experimental method based on a similar simulation experimental device for the thermal environment of a deep high-temperature tunnel, which is of great significance for exploring the thermal insulation effect of the thermal insulation spray layer and the influence of the surrounding rock temperature field change. Therefore, with the help of a similar simulation experiment, the surrounding rock temperature field change can be simulated more intuitively and vividly. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;
[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;
[0019] Figure 3 It is an axonometric view of the surrounding rock mold in the present invention;
[0020] Figure 4 It is a side view structural schematic diagram of the present invention;
[0021] Figure 5 for Figure 4 The enlarged view of point A in the middle;
[0022] Figure 6 is an axonometric view of the first building block in the present invention;
[0023] Figure 7 It is an axonometric view of the second building block in the present invention.
[0024] Reference numerals include:
[0025] 1- surrounding rock mold, 2- plate, 3- insulation board, 4- first block, 5- second block, 6- tunnel, 7- fissure material, 8- heating cable, 9- AC contactor, 10- temperature controller, 11- constant temperature and humidity machine, 12- blower, 13- first air duct, 14- second air duct, 15- data acquisition device, 16- computer, 17- temperature probe, 18- wind speed sensor, 19- humidity sensor. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0027] Embodiment 1
[0028] See also Figure 1-7 The present invention provides a technical solution: the present invention includes a surrounding rock main body device, surrounding rock similar simulation materials, surrounding rock temperature control system, wind flow control system and data acquisition system. The surrounding rock main body device is used to simulate the thermal environment of surrounding rock in mine shafts and tunnels. The surrounding rock similar simulation materials are arranged inside the surrounding rock main body device, and a tunnel 6 is arranged in the middle of the surrounding rock similar simulation materials. The surrounding rock temperature control system is arranged inside the surrounding rock main body device, and is used to control the temperature of the surrounding rock similar simulation materials. The wind flow control system is arranged outside the surrounding rock main body device, and the wind flow control system includes an air outlet end, and the air outlet end of the wind flow control system is connected to one section of the tunnel 6. The wind flow control system is used to provide air with constant temperature, humidity and air volume to the tunnel 6. The data acquisition system is arranged outside the surrounding rock main body device, and the data acquisition system is electrically connected to the surrounding rock temperature control system and the wind flow control system, and is used to monitor and collect data of the simulation experiment.
[0029] See also Figure 1-5 The surrounding rock main device includes a surrounding rock mold 1, a number of plates 2 and a number of insulation plates 3. The surrounding rock mold 1 uses angle steel and bolt welding anchoring to build the tunnel 6 boundary frame, and uses the 1.5 cm thick plate 2 to build the boundary wall. Finally, the insulation plate 3 is used to close the model and only leave the tunnel 6 opening to simulate the closed temperature field of the surrounding rock.
[0030] See also Figure 1-7 , the surrounding rock similar simulation material includes a number of first blocks 4, a number of second blocks 5 and fissure materials 7, and the tunnel 6 runs through the number of second blocks 5 and is embedded in the center of the number of second blocks 5. The surrounding rock similar simulation material has thermophysical parameters similar to those of the real surrounding rock. In order to meet the needs of multifunctional and multi-working condition applications of similar models, two surrounding rock similar materials with the same thermophysical properties and different mechanical properties are designed, namely fissure materials 7 and rock materials, which are convenient for the construction and disassembly of the model and simulate the changing trend of the temperature stress field of the surrounding rock under different working conditions. At the same time, when tamping the surrounding rock, the broken state of the deep surrounding rock can be effectively simulated and combined with the intact rock state to simulate the broken surrounding rock working condition of the later tunnel 6 support structure strength test. Among them, the similar material with lower strength is called fissure material 7, and the similar material with higher strength is called rock material. The rock material is used to make the first block 4 and the second block 5 in a pre-made mold, and then the overall model is tamped in the form of layered assembly.
[0031] See also Figure 1-5 The surrounding rock temperature control system includes a number of heating cables 8, AC contactors 9 and temperature controllers 10. The heating cables 8 are evenly arranged between the simulated surrounding rock and the insulation layer, and are smoothed again with the fissure material 7 so that the heating cables 8 are in full contact with the surrounding rock to exert the heating performance. The heating cables 8 are electrically connected to the temperature controller 10 and are independently controlled by the temperature controller 10 to simulate different thermal environments of the deep surrounding rock tunnel 6 by changing the surrounding rock temperature.
[0032] See also Figure 1-3 The wind flow control system includes a constant temperature and humidity machine 11, a blower 12, a first air duct 13 and a second air duct 14. The cotton cloth can be used to insulate the air inlet duct and seal the gap at the connection of the wind flow control system.
[0033] See also Figure 1-4 The data acquisition system includes a data acquisition device 15, a computer 16, a plurality of temperature probes 17, three wind speed sensors 18 and five humidity sensors 19. In this embodiment, there are 48 temperature probes 17, and a total of 4 monitoring sections are set. The three wind speed sensors 18 are used to detect the wind speed of the openings on both sides of the lane 6 and the air outlet of the constant temperature and humidity machine 11, and the five humidity sensors 19 are used to detect the humidity of the openings on both sides of the lane 6, the air outlet of the constant temperature and humidity machine 11, the air inlet of the blower 12 and the air outlet of the blower 12.
[0034] Embodiment 2
[0035] A method for using a deep high-temperature tunnel thermal environment similarity simulation experimental device, using the deep high-temperature tunnel thermal environment similarity simulation experimental device in embodiment 1, comprising the following steps:
[0036] Step 1: Turn on the data acquisition system, check whether the data acquisition line connection is intact, and calibrate the sensor.
[0037] Step 2: Install the air inlet section of alley 6 and the blower 12, connect the air inlet section of alley 6 and the constant temperature and humidity machine 11 with the first air duct 13, the second air duct 14 and the blower 12, and use cotton cloth to insulate the air inlet duct and seal the gap at the connection of the air flow control system.
[0038] Step 3: Connect the electrodes of the heating cable 8 to the output electrodes of the power supply of the AC contactor 9, turn on the power supply of the AC contactor 9, and detect the working status of the heating cable 8 through the current value and voltage value.
[0039] Step 4: Take the outermost boundary of the surrounding rock of simulated tunnel 6 as the temperature control point, and set the upper and lower limits of the temperature control point, where the upper limit is set to the original rock temperature and the lower limit is 0.2°C lower than the upper limit. When the temperature exceeds the upper limit of the control point, the heating is automatically terminated, and when the temperature is lower than the lower limit of the control point, the heating program is automatically started.
[0040] Step 5. Set the heating mode to automatic control steady current heating, the soft start time to 10s, the output current to step reduction mode, the output current range is 300A-100A, the decrease value is 50A, and each heating time is 2h.
[0041] Step 6: Start the heating program. After the temperature of all measuring points in the surrounding rock of simulated tunnel 6 is close to the original rock temperature, the heating mode is adjusted to manual control steady-current heating, the current is adjusted to 100A, and the temperature change trend of each measuring point is observed.
[0042] Step 7. Use the approximation method to repeatedly adjust the current within the range of 20A-100A to find a current value that keeps the outer boundary temperature of the surrounding rock of simulated tunnel 6 basically unchanged, until the temperature of all measuring points in the surrounding rock of simulated tunnel 6 is basically stable.
[0043] Step 8. Keep warm for 6h-8h, and observe the temperature of each measuring point in the surrounding rock of simulated tunnel 6. If the temperature fluctuation is large, continue to use the approximation method in step 7 to find a stable current until the current and voltage at the outer boundary temperature of the surrounding rock of simulated tunnel 6 are found. In this way, the heat dissipation power of the equipment in the laboratory environment can be obtained.
[0044] Step 9: After the temperature of all measuring points is constant, turn on the constant temperature and humidity machine 11 and the blower 12, adjust the wind temperature to 20°C, humidity to 20%, and wind speed to 7m / s, and send air to the tunnel 6 until the temperature of the outermost boundary of the surrounding rock drops to 36.6°C, which is about 1% different from the original rock temperature.
[0045] Step 10: Stop the operation of the constant temperature and humidity machine 11 and the blower 12, save the data, and enter the temperature rise phase of the next set of tests.
[0046] Step 11. Repeat steps 4 to 10, and conduct tests at wind speeds of 5m / s to 8m / s, until the temperature of the outermost boundary of the surrounding rock drops to 36.6°C.
[0047] Step 12: Repeat steps 4 to 9 and conduct a test with a wind speed of 5 m / s and a wind temperature of 10°C.
[0048] Step 13. Repeat steps 4 to 10, and adjust the original rock temperature to 38°C and 39°C, the wind speed to 7m / s, and the wind temperature to 20°C, until the outermost boundary temperature of the surrounding rock drops to 37.6°C and 38.6°C respectively, and end a set of tests.
[0049] Step 14: Turn off the heating power, organize the data, and end the test.
[0050] In this embodiment, the thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in the simulation experiment in a high temperature environment are obtained, and the geometric similarity ratio of tunnel 6 and the simulation experimental device is obtained. Based on the geometric similarity ratio and the thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in tunnel 6, the thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in the actual surrounding rock tunnel are calculated.
[0051] In this embodiment, the thermal conductivity of the similar material of tunnel 6 is equal to the thermal conductivity of the rock mass of the actual surrounding rock tunnel. The ventilation wind speed of tunnel 6 is multiplied by the geometric similarity ratio to obtain the ventilation wind speed of the actual surrounding rock tunnel. The ventilation wind speed of tunnel 6 is multiplied by the square of the geometric similarity ratio to obtain the ventilation time of the actual surrounding rock tunnel. The surrounding rock temperature of tunnel 6 is equal to the original rock temperature of the actual surrounding rock tunnel.
[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A deep high-temperature tunnel thermal environment similarity simulation experimental device, characterized in that: include: Surrounding rock main body device, used to simulate the thermal environment of surrounding rock in mine shafts and tunnels; Surrounding rock similar simulation material is arranged inside the surrounding rock main body device, and a tunnel is arranged in the middle of the surrounding rock similar simulation material; A surrounding rock temperature control system, arranged inside the surrounding rock main body device, for controlling the temperature of the surrounding rock similar simulation material; An air flow control system is arranged outside the surrounding rock main body device, the air flow control system comprises an air outlet end, the air outlet end of the air flow control system is connected to one section of the tunnel, and the air flow control system is used to provide air with constant temperature, humidity and air volume to the tunnel; A data acquisition system is arranged outside the surrounding rock main body device. The data acquisition system is electrically connected to the surrounding rock temperature control system and the wind flow control system, and is used to monitor and collect data from the simulation experiment.
2. The deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 1 is characterized in that: The surrounding rock main body device comprises: Surrounding rock mold; A plurality of plates, arranged on the inner side of the surrounding rock mold, for building the boundary wall of the surrounding rock mold; A plurality of heat-insulating plates are arranged on the inner side of the plate, and avoidance openings are arranged on the heat-insulating plates on both sides of the lane, and the positions and shapes of the two avoidance openings match the two ends of the lane.
3. The deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 2 is characterized in that: The surrounding rock similarity simulation materials include: A plurality of first building blocks are arranged in a matrix shape inside the surrounding rock main body device, with a gap between two adjacent first building blocks; A plurality of second building blocks, wherein the plurality of second building blocks are arranged horizontally in a straight line and closely fitted, the second building blocks are arranged at the center of the plurality of first building blocks, there is a gap between the second building blocks and the first building blocks, the tunnel passes through the plurality of second building blocks and is inlaid at the center of the plurality of second building blocks, and the first building blocks and the second building blocks are both made of rock materials; The crack material is filled in the gaps between adjacent ones of the first building blocks and the gap between the first building block and the second building block, and the strength of the crack material is lower than the strength of the rock material.
4. The deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 3 is characterized in that: The surrounding rock temperature control system comprises: A plurality of heating cables are evenly distributed between the insulation board and the surrounding rock-like simulation material; An AC contactor is arranged outside the surrounding rock main body device, and the heating cable is electrically connected to the AC contactor; A temperature controller is arranged on the outside of the surrounding rock main body device, and the temperature controller is electrically connected to the AC contactor.
5. The deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 4 is characterized in that: The wind flow control system comprises: Constant temperature and humidity machine; A blower, wherein the air inlet of the blower is connected to the air outlet of the constant temperature and humidity machine through a first air duct, and the air outlet of the blower is connected to one end of the lane through a second air duct.
6. The deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 5 is characterized in that: The data acquisition system comprises: Data collector; A computer, the computer being electrically connected to the data collector; A plurality of temperature probes, the plurality of temperature probes are distributed in a matrix shape and are all located in the same horizontal plane, the temperature probes and the axial middle position of the second building block are located at the same height, and in the length extension direction of the tunnel, the plurality of temperature probes form four monitoring sections, and the temperature probes are electrically connected to the temperature controller and the data collector; Three wind speed sensors are respectively arranged at the openings on both sides of the lane and the air outlet of the constant temperature and humidity machine, and the wind speed sensors are electrically connected to the data collector; Five humidity sensors are respectively arranged at the openings on both sides of the lane, the air outlet of the constant temperature and humidity machine, the air inlet of the blower and the air outlet of the blower. The humidity sensors are electrically connected to the data collector.
7. A method for using a deep high-temperature tunnel thermal environment similarity simulation experimental device, using the deep high-temperature tunnel thermal environment similarity simulation experimental device as claimed in claim 6, characterized in that: The following steps are involved: Step 1: Turn on the data acquisition system, check whether the data acquisition line connection is intact, and calibrate the sensor; Step 2: Install the air inlet section and the blower of the lane, connect the air inlet section of the lane and the constant temperature and humidity machine with the first air duct, the second air duct and the blower, and use cotton cloth to insulate the air inlet duct and seal the gap at the connection of the air flow control system; Step 3, connecting the electrodes of the heating cable to the output electrodes of the power supply of the AC contactor, turning on the power supply of the AC contactor, and detecting the working state of the heating cable through the current value and the voltage value; Step 4: Take the outermost boundary of the simulated tunnel surrounding rock as the temperature control point, set the upper and lower limits of the temperature control point, where the upper limit is set to the original rock temperature, and the lower limit is 0.2°C lower than the upper limit. When the temperature exceeds the upper limit of the control point, the heating is automatically terminated, and when the temperature is lower than the lower limit of the control point, the heating program is automatically started; Step 5. Set the heating mode to automatic control steady current heating, the soft start time to 10s, the output current to step reduction mode, the output current range is 300A-100A, the decrement value is 50A, and each heating time is 2h; Step 6: Start the heating program. After the temperature of all measuring points in the surrounding rock of the simulated tunnel is close to the original rock temperature, the heating mode is adjusted to manual control steady current heating, the current is adjusted to 100A, and the temperature change trend of each measuring point is observed; Step 7: repeatedly adjust the current within the range of 20A-100A by using the approximation method to find a current value that makes the outer boundary temperature of the simulated tunnel surrounding rock basically unchanged, until the temperature of all measuring points in the simulated tunnel surrounding rock is basically stable; Step 8: Keep warm for 6-8 hours, and observe the temperature of each measuring point in the surrounding rock of the simulated tunnel. If the temperature fluctuation is large, continue to use the approximation method in step 7 to find a stable current until the current and voltage at the outer boundary temperature of the surrounding rock of the simulated tunnel is found. In this way, the heat dissipation power of the equipment in the laboratory environment can be obtained. Step 9: After the temperature of all measuring points is constant, turn on the constant temperature and humidity machine and the blower, adjust the wind temperature to 20°C, the humidity to 20%, and the wind speed to 7m / s, and supply air to the tunnel until the temperature of the outermost boundary of the surrounding rock drops to 36.6°C; Step 10, stop the operation of the constant temperature and humidity machine and the blower, save the data, and enter the temperature rise phase of the next set of tests; Step 11: Repeat steps 4 to 10, respectively, and conduct tests at wind speeds of 5 m / s to 8 m / s, until the outermost boundary temperature of the surrounding rock drops to 36.6°C; Step 12: Repeat steps 4 to 9 to conduct a test with a wind speed of 5 m / s and a wind temperature of 10°C; Step 13, repeat steps 4 to 10, and adjust the original rock temperature to 38°C and 39°C, the wind speed to 7m / s, and the wind temperature to 20°C, until the outermost boundary temperature of the surrounding rock drops to 37.6°C and 38.6°C respectively, and end a set of tests; Step 14: Turn off the heating power, organize the data, and end the test.
8. The method for using the deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 7 is characterized in that: The thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in the simulation experiment in a high temperature environment are obtained, and the geometric similarity ratio between the tunnel and the simulation experiment device is obtained. According to the geometric similarity ratio and the thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in the tunnel, the thermal conductivity, ventilation wind speed, ventilation time, and original rock temperature of similar materials in the actual surrounding rock tunnel are calculated.
9. The method for using the deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 8 is characterized in that: The thermal conductivity of the similar material of the tunnel is equal to the thermal conductivity of the rock mass of the actual surrounding rock tunnel. The ventilation wind speed of the tunnel is multiplied by the geometric similarity ratio to obtain the ventilation wind speed of the actual surrounding rock tunnel. The ventilation wind speed of the tunnel is multiplied by the square of the geometric similarity ratio to obtain the ventilation time of the actual surrounding rock tunnel. The surrounding rock temperature of the tunnel is equal to the original rock temperature of the actual surrounding rock tunnel.
10. The method for using the deep high-temperature tunnel thermal environment similarity simulation experimental device according to claim 7 is characterized in that: The heating cable is electrically connected to the temperature controller and is independently controlled by the temperature controller to simulate different thermal environments of deep surrounding rock tunnels by changing the surrounding rock temperature.