Three-dimensional heat conductivity coefficient real-time testing system for deep loaded rock

Abstract

The present application relates to a deep loaded rock three-dimensional thermal conductivity coefficient real-time testing system, comprising six pressure heads and a heating cabin, heating elements are arranged in the wallboard of the heating cabin, and the six pressure heads are operatively arranged in the heating cabin; the six pressure heads are arranged in the X-axis, Y-axis and Z-axis directions in pairs; the front end of at least one of the pressure heads is provided with a pad, an electric heating element is arranged in the groove between the pad and the pressure head, and a heat flow sensor and a temperature sensor are arranged in the hole at the front end of each pressure head. The sample is heated on one side by the electric heating element, so that the sample generates a counter temperature difference. There is heat conduction when there is a temperature difference. The heat flow and temperature values of the corresponding side can be measured by using the heat flow sensor and the temperature sensor, and then the thermal conductivity coefficient of the sample can be calculated. The whole cavity can be heated by the heating cabin, and a deep temperature environment is provided for the sample. The opposite temperature difference is generated by the electric heating element on the pressure head, which is beneficial to the real-time testing of the three-dimensional thermal conductivity coefficient of the rock under the deep load and the real temperature environment.

Description

Technical Field

[0001] This invention relates to the field of rock thermal conductivity testing technology, and in particular to a real-time testing system for the three-dimensional thermal conductivity of deeply loaded rocks. Background Technology

[0002] The ability of a material to directly conduct heat is called thermal conductivity. Thermal conductivity is defined as the amount of heat that a unit cross-section and length of material can directly conduct under a unit temperature difference and per unit time. The unit of thermal conductivity is watts per meter per Kelvin (W / (m·K)).

[0003] Thermal conductivity is one of the most important physical properties of rocks. It plays a significant role in geothermal development and geotechnical thermal engineering applications. Rock thermal conductivity represents the rock's ability to conduct heat, that is, the amount of heat passing through a unit area per unit time when the temperature decreases by one degree Celsius per unit length along the direction of heat flow.

[0004] Existing methods for testing the thermal conductivity of rocks typically employ the hot-wire method, which involves placing a hot wire inside the sample. During testing, a constant heating power is applied to the wire, causing its temperature to rise. The thermal conductivity is calculated by measuring the temperature change of the hot wire itself or at a certain distance parallel to the wire in relation to the sample. This method requires pretreatment of the rock, altering its properties. Furthermore, due to the limitations of measurement and control, real-time testing of the three-dimensional thermal conductivity of rocks under load is not possible. Therefore, currently, there is a lack of technology capable of real-time testing of the three-dimensional thermal conductivity of deeply loaded rocks. Summary of the Invention

[0005] This application provides a real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks to solve the above problems.

[0006] This application is achieved through the following technical solution: The real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks provided in this application includes six indenters, with each indenter positioned in pairs along the X, Y, and Z axes. At least one indenter has a pad at its front end, and a groove between the pad and the indenter houses an electric heating element. Each indenter has a hole at its front end housing a heat flow sensor and a temperature sensor. Heating one side of the sample through the pad creates a temperature difference between opposing sides. This temperature difference leads to heat conduction. The heat flow sensor on the corresponding side measures the heat flow rate, and the temperature sensor measures the surface temperature of the sample, thus enabling the testing of the sample's thermal conductivity.

[0007] Optionally, one of the pressure heads in the X-axis direction is equipped with a pad and an electric heating element at its front end, one of the pressure heads in the Y-axis direction is equipped with a pad and an electric heating element at its front end, and one of the pressure heads in the Z-axis direction is equipped with a pad and an electric heating element at its front end.

[0008] Specifically, the pad has through holes corresponding to the positions of the heat flow sensor and the temperature sensor, and a thermal pad is installed in the through holes of the pad. A thermal pad is installed in the front hole of the pressure head without a pad at the front end, and the heat flow sensor and the temperature sensor are located at the rear end of the thermal pad.

[0009] In particular, each pressure head has a hole in the middle of its front end for a heat flow sensor.

[0010] Optionally, the heat flow sensor and temperature sensor can be integrated into a single probe.

[0011] Optionally, the electric heating element is a resistance wire, and the back of the heating pad has a groove for mounting the resistance wire. The resistance wire is fixed in the groove by a plurality of spaced ceramic rings, and the pressure head is fastened to the back of the pad.

[0012] Notably, both the pressure head and the pad are rectangular.

[0013] Optionally, the six pressure heads can be connected together using at least eight highly elastic metal sheets.

[0014] Specifically, taking the example of connecting 6 pressure heads together with 12 elastic metal sheets, each pressure head is connected to the four pressure heads around it by an elastic metal sheet.

[0015] Optionally, a displacement detection mechanism may be provided between two pressure heads in the same axial direction.

[0016] In particular, the real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks also includes a heating chamber, in which heating elements are provided in the wall panels, and the six pressure heads are operably placed inside the heating chamber.

[0017] Optionally, the heating chamber includes 6 heating wall panels and 6 docking heads. The heating wall panels are equipped with electric heating elements. The 6 docking heads are respectively installed in the through holes of one of the heating wall panels and can move axially relative to the chamber body. The 6 docking heads are located in pairs in the X-axis, Y-axis and Z-axis directions, and are docked with the rear end of one of the heads respectively.

[0018] In particular, the real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks also includes an outer cubic frame, with six heating wall panels installed in six directions on the outer cubic frame. Each heating wall panel has an elastic plate on its outer side, with both ends of the elastic plate movably connected to the outer cubic frame. The elastic plate and the heating wall panel have coaxial through holes, and the mating head is installed in the through holes of the elastic plate and the heating wall panel, and the mating head is fixedly connected to the elastic plate.

[0019] Compared with the prior art, this application has the following beneficial effects: 1. This application has an electric heating element installed at the front end of at least one pressure head. The pressure head can load the sample, and the electric heating element can locally heat one side of the sample, which can generate a temperature difference between opposite sides of the sample. The heat flow and temperature on the corresponding side can be measured by the heat flow sensor and temperature sensor on the corresponding side, thereby realizing the test of the thermal conductivity of the sample. 2. In this application, an electric heating element is installed at the front end of one of the indenters in the X, Y, and Z axes, which can be used to test the thermal conductivity of rocks in the X, Y, and Z axes. 3. The displacement detection mechanism can measure the deformation of the sample under load, thereby obtaining the sample size and measuring the thermal conductivity of the sample under load. 4. This application can heat the entire cavity through the heating chamber to provide a deep temperature environment for the sample, and then generate a temperature difference on the opposite side through the electric heating element on the pressure head, which is beneficial for testing the thermal conductivity of the rock sample under real temperature conditions. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of this application and form part of this application, do not constitute a limitation on the embodiments of the present invention.

[0021] Figure 1 This is a three-dimensional diagram of the real-time testing system for the three-dimensional thermal conductivity of deeply loaded rocks in the embodiment; Figure 2 This is a cross-sectional view of a real-time testing system for the three-dimensional thermal conductivity of deep-loaded rock with a pad block at the front end of only one pressure head, as described in the embodiment. Figure 3 This is a cross-sectional view of a real-time testing system for the three-dimensional thermal conductivity of deeply loaded rock with pads placed at the front ends of the three pressure heads, as described in the embodiment. Figure 4 This is a cross-sectional view of the pressure head connecting pad in the embodiment; Figure 5 This is a three-dimensional view of the pad block in the embodiment; Figure 6 This is a three-dimensional view of the heating chamber in the embodiment; Figure 7 This is a cross-sectional view of the heating chamber in the embodiment; Figure 8 This is a three-dimensional view of the first type of heating wall panel in the embodiment; Figure 9 This is a three-dimensional view of the first type of heating wall panel in the embodiment; Figure 10 This is a three-dimensional view of the second type of heating wall panel in the embodiment; Figure 11 This is a three-dimensional view of the elastic plate in the embodiment; Figure 12This is a three-dimensional diagram of an embodiment where a displacement detection mechanism is provided between two pressure heads along the same axis. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. It should also be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0025] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] like Figures 1-3As shown, the real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks disclosed in this embodiment includes six indenters 41, which are located in pairs along the X-axis, Y-axis, and Z-axis directions to contact the sample from six directions.

[0028] At least one of the pressure heads 41 has a pad 6 at its front end, and an electric heating element 31 is installed in a groove between the pad 6 and the pressure head 41. It is worth noting that the groove can be provided on either the pad 6 or the pressure head 41, or on both.

[0029] Each pressure head 41 has a hole at its front end equipped with a heat flow sensor and a temperature sensor, enabling the measurement of heat flow and sample surface temperature during the experiment. The electric heating element 31 locally heats one side of the sample 10, creating a temperature difference between opposite sides. This temperature difference leads to heat conduction. The heat flow sensor on the corresponding side can measure the heat flow on that side, and the temperature sensor can measure the temperature. Given the dimensions of the sample 10, its thermal conductivity can be calculated.

[0030] In one possible design, such as Figure 2 As shown, only the front end of the indenter 41 above the Z-axis is equipped with a pad 6, which can uniformly heat the upper part of the sample 10 according to the test requirements. The temperature can reach room temperature +10℃ to 600℃, with a temperature uniformity of 5℃. It is worth noting that the thickness of the indenter 41 with the pad 6 at the front end is less than the thickness of the other indenters 41, so that its total thickness after installing the pad 6 is comparable to the thickness of the other indenters 41.

[0031] In one possible design, such as Figure 3 As shown, a pad 6 and an electric heating element 31 are mounted at the front end of one of the indenters 41 in the X-axis direction; a pad 6 and an electric heating element 31 are mounted at the front end of one of the indenters 41 in the Y-axis direction; and a pad 6 and an electric heating element 31 are mounted at the front end of one of the indenters 41 in the Z-axis direction. When testing the thermal conductivity in a single direction, the electric heating elements 31 in the other directions do not operate. The three-dimensional thermal conductivity of the sample is obtained by testing the thermal conductivity in the X-axis, Y-axis, and Z-axis directions.

[0032] In one possible design, each pressure head 41 has a pad 6 and an electric heating element 31 mounted on its front end.

[0033] In one possible design, the pad 6 has through holes corresponding to the positions of the heat flow sensor and the temperature sensor.

[0034] In one possible design, a thermally conductive pad 410 is installed in the through hole of the pad 6, and a thermally conductive pad 410 is installed in the front hole of the pressure head 41, which does not have a pad 6 at the front end. The heat flow sensor and the temperature sensor are located at the rear end of the thermally conductive pad, and the sample temperature is transferred to the heat flow sensor and the temperature sensor through the thermally conductive pad 410. In one possible design, the heat flow sensor and the temperature sensor are integrated on the same probe.

[0035] In one possible design, a temperature and heat flow integrated probe is embedded in the central hole of each pressure head 41, and the temperature is transferred to the temperature and heat flow integrated probe inside the central hole through the thermal pad 410.

[0036] In one possible design, at least eight elastic metal sheets 42 are used to connect six pressure heads 41 together to form a sample space for placing the sample, and the sample 10 is placed in the sample space.

[0037] The number of elastic metal sheets 42 is set reasonably according to needs. In one possible design, for example, 12 elastic metal sheets 42 are used to connect 6 indenters 41 together. Each indenter 41 is connected to four other indenters 41 around its perimeter by an elastic metal sheet 42. The 12 elastic metal sheets 42 allow the 6 indenters 41 to be assembled together, thus achieving a tight fixation and fit between the indenter and the cubic sample.

[0038] In another embodiment, the six pressure heads 41 can be connected together using more flexible metal sheets 42.

[0039] Optionally, the outer end of the pressure head 41 is provided with a spring groove that is adapted to the elastic metal sheet 42. The spring groove is provided with a screw hole. One end of the elastic metal sheet 42 is placed in the spring groove and connected to the pressure head 41 by a screw.

[0040] In one possible design, both the indenter 41 and the pad 6 are rectangular. The indenter 41 and the pad 6 contact the sample surface, allowing pressure to be evenly transmitted to the sample. It is worth noting that the dimensions of the indenter 41 can be appropriately set as needed. Optionally, the indenter 41 and the pad 6 can be adapted to a cubic sample with a side length of 100 mm.

[0041] In one possible design, the electric heating element 31 is a resistance wire. Specifically, such as... Figure 4 , Figure 5 As shown, there is a groove 61 on the back of the pad 6 for mounting the resistance wire. The resistance wire is fixed in the groove 61 by multiple spaced ceramic rings 62, and the pressure head 41 is fastened to the back of the pad 6. The resistance wire passes through the ceramic rings 62 in sequence, and the ceramic rings 62 are locked in the groove 61, which can avoid direct contact between the resistance wire and the pad 6 and prevent local overheating.

[0042] In one possible design, the pad 6 contacts the pressure head 41, and the surface can be provided with a slot for alignment.

[0043] In one possible design, the pressure head 41 is made entirely of a high-rigidity alloy material, possessing sufficient rigidity to meet 12 GN / m. The pad block 6 is also made of a high-rigidity alloy material.

[0044] In one possible design, the real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks also includes a heating chamber with heating elements in the walls, and six pressure heads 41 are operably placed inside the heating chamber.

[0045] In one possible design, such as Figure 6 , Figure 7 As shown, the heating chamber includes a hexahedral chamber 1. The chamber 1 comprises a high-rigidity outer cubic frame 11 and six heating wall panels 12. The six heating wall panels 12 are located in six directions of the outer cubic frame 11 and are connected by screws. Each of the six heating wall panels 12 has an embedded electric heating element 31, and the exterior of each heating wall panel 12 has an electrode cover 32 adapted to the electric heating element 31. Specifically, the electric heating element 31 is a resistance heating wire.

[0046] In one possible design, a docking head 2 is installed in the central through-hole of each of the six heated wall panels 12. The docking head 2 is axially movable relative to the cabin 1. The six docking heads are located in pairs along the X, Y, and Z axes, respectively, and are used for docking with the six other docking heads 41.

[0047] Optionally, the inner end of the mating head 2 is a cylindrical pressure rod 21, and the outer end is a ball head 22 that mates with the actuator pressure head. The ball head 22 is used for ball-and-socket mating with the hydraulic actuator.

[0048] In one possible design, the structure of the heating wall panel 12 can be one of the following two: The first type, such as Figure 6 , Figure 8 , Figure 9 As shown, the heating wall panel 12 is integrally manufactured. An elastic plate 13 is located on the outer side of the heating wall panel 12. Both ends of the elastic plate 13 are movably connected to the outer cubic frame 11. The elastic plate 13 and the heating wall panel 12 have coaxial through holes. A mating pressure head 2 is installed in the through hole and is fixed to the elastic plate 13 by screws. The outer surface of the heating wall panel 12 has a matching groove 120 corresponding to the position of the elastic plate 13, ensuring a gap between the elastic plate 13 and the outer surface of the heating wall panel 12 under normal conditions.

[0049] The second type, such as Figure 6 , Figure 10As shown, the heating wall panel 12 is divided into a first panel 121, a second panel 122, and a third panel 123, which are manufactured independently. The first panel 121, the second panel 122, and the third panel 123 are assembled sequentially to form the heating wall panel 12. The second panel 122 is located between the first panel 121 and the third panel 123. The first panel 121 and the third panel 123 are fixed to the outer cubic frame 11 by screws. The electric heating element 31 is mounted on the first panel 121 and the third panel 123. The second panel 122 is slidably engaged with the first panel 121 and the third panel 123. The mating head 2 is mounted on the second panel 122.

[0050] The outer side of the second plate 122 has an elastic plate 13. Both ends of the elastic plate 13 are movably connected to the outer cubic frame 11. The elastic plate 13 and the second plate 122 have coaxial through holes. The mating pressure head 2 is installed in the through holes of the elastic plate 13 and the second plate 122 and is fixedly connected to the elastic plate 13 and the second plate 122 by screws. Specifically, the outer surface of the second plate 122 is lower than the first plate 121 and the second plate 122, forming a groove that fits the elastic plate 13. The elastic plate 13 is installed in this groove. Under external force, the second plate 122 can move inward relative to the first plate 121 and the third plate 123 to transmit pressure; after the external force disappears, the elastic plate 13 drives the second plate 122 to reset.

[0051] In one possible design, the first plate 121 and the third plate 123 have limiting steps to prevent the second plate 122 from sliding outward, and the second plate 122 has steps on both sides that are adapted to the limiting steps. Of course, the first plate 121 and the third plate 123 are respectively equipped with electrode covers 32 adapted to the electric heating element 31.

[0052] Optional, such as Figure 11 As shown, the elastic plate 13 has strip-shaped notches 131 at both ends, and the outer cubic frame 11 is equipped with matching screws at the corresponding positions of the strip-shaped notches 131. The two ends of the elastic plate 13 are respectively secured to the screws of the outer cubic frame 11 through multiple strip-shaped notches 131.

[0053] It is worth noting that all six heating wall panels 12 of the cabin 1 may adopt the heating wall panel 12 of the first structure mentioned above, or all of them may adopt the heating wall panel 12 of the second structure; or they may partially adopt the heating wall panel 12 of the first structure and partially adopt the heating wall panel 12 of the second structure.

[0054] During use, the chamber temperature can be set according to experimental requirements. In one possible design, the heating chamber temperature can range from room temperature +10℃ to 600℃, with a temperature uniformity of 5℃.

[0055] The entire cavity is heated by the heating wall plate 12 of the chamber 1 to provide the ambient temperature for the sample; the temperature difference between the two sides of the sample is achieved by heating the electric heating element 316 on the pressure head 41, and the thermal conductivity can be measured by this temperature difference.

[0056] In one possible design, such as Figure 12 As shown, a displacement detection mechanism 5 is provided between the two indenters 41 in the X-axis direction, between the two indenters 41 in the Y-axis direction, and between the two indenters 41 in the Z-axis direction, which can monitor the deformation of the sample in the X, Y, and Z directions. The displacement detection mechanism 5 can measure the deformation of the sample 10 under load, thereby obtaining the dimensions of the sample 10, and can also measure the thermal conductivity of the sample 10 under load.

[0057] In one possible design, the displacement detection mechanism 5 includes a first mounting base 51, a second mounting base 52, a first lead-out rod 53, a second lead-out rod 54, a sensor mounting block 55, and a displacement sensor 56. The first lead-out rod 53 and the second lead-out rod 54 are parallel. One end of the first lead-out rod 53 is fixedly connected to the first mounting base 51, and one end of the second lead-out rod 54 is fixedly connected to the second mounting base 52. The other end of the first lead-out rod 53 is connected to the sensor mounting block 55. The displacement sensor 56 is mounted on the sensor mounting block 55, and the other end of the second lead-out rod 54 is adapted to the detection end of the displacement sensor 56. The two are connected or not connected. The first mounting base 51 and the second mounting base 52 are respectively mounted on two pressure heads 41 on the same shaft by screws. When the sample 10 deforms, the two pressure heads 41 on the same axis undergo relative displacement, which causes the first lead-out rod 53 and the second lead-out rod 54 to undergo relative displacement, which in turn causes the sensor mounting block 55 and the second lead-out rod 54 to undergo relative displacement. The displacement sensor 56 that is adapted to it can detect the amount of displacement and realize deformation monitoring.

[0058] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A real-time testing system for the three-dimensional thermal conductivity of deep-loaded rocks, characterized in that: It includes 6 pressure heads (41), with each of the 6 pressure heads (41) located in pairs along the X-axis, Y-axis, and Z-axis directions; At least one of the pressure heads (41) has a pad (6) installed at its front end, and an electric heating element (31) is installed in a groove (61) between the pad (6) and the pressure head (41). Each pressure head (41) has a hole at its front end for a heat flow sensor and a temperature sensor. It also includes a heating chamber and an outer cubic frame (11). Heating elements are provided in the wall panels of the heating chamber. The six pressure heads (41) are operably placed inside the heating chamber. The heating chamber includes six heating wall panels (12) and six docking pressure heads (2). The six docking pressure heads (2) are respectively used to dock with the rear end of one of the pressure heads (41). Six heating wall panels (12) are respectively installed in six directions of the outer cubic frame (11), and six docking heads (2) are respectively installed in the through holes of one of the heating wall panels (12) and can move axially relative to the cabin (1). The heating wall panel (12) is divided into a first panel (121), a second panel (122) and a third panel (123) manufactured independently. The first panel (121), the second panel (122) and the third panel (123) are assembled in sequence to form the heating wall panel (12). The second panel (122) is located between the first panel (121) and the third panel (123). The first panel (121) and the third panel (123) are fixedly connected to the outer cubic frame (11). The electric heating element (31) is mounted on the first panel (121) and the third panel (123). The second panel (122) is slidably engaged with the first panel (121) and the third panel (123). The second plate (122) has an elastic plate (13) on its outer side. The two ends of the elastic plate (13) are movably connected to the outer cubic frame (11). The elastic plate (13) and the second plate (122) have coaxial through holes. The mating head (2) is installed in the through holes of the elastic plate (13) and the second plate (122) and is fixed together with the elastic plate (13).

2. The real-time testing system for three-dimensional thermal conductivity of deep loaded rock according to claim 1, characterized in that: One of the pressure heads (41) in the X-axis direction is equipped with a pad (6) and an electric heating element (31) at its front end. One of the pressure heads (41) in the Y-axis direction is equipped with a pad (6) and an electric heating element (31) at its front end. One of the pressure heads (41) in the Z-axis direction is equipped with a pad (6) and an electric heating element (31) at its front end.

3. The real-time testing system for the three-dimensional thermal conductivity of deep-loaded rock according to claim 1 or 2, characterized in that: The pad (6) has through holes corresponding to the positions of the heat flow sensor and the temperature sensor; the through holes of the pad (6) are filled with a heat-conducting pad (410), and the front hole of the pressure head (41) without the pad (6) is filled with a heat-conducting pad (410). The heat flow sensor and the temperature sensor are located at the rear end of the heat-conducting pad.

4. The real-time testing system for the three-dimensional thermal conductivity of deep-loaded rock according to claim 1 or 2, characterized in that: The heat flow sensor and temperature sensor are integrated into a single probe.

5. The real-time testing system for three-dimensional thermal conductivity of deep loaded rock according to claim 1, characterized in that: The electric heating element (31) is a resistance wire. The back of the pad (6) has a groove (61) for installing the resistance wire. The resistance wire is fixed in the groove (61) by multiple spaced ceramic rings (62). The pressure head (41) is fastened to the back of the pad (6).

6. The real-time testing system for the three-dimensional thermal conductivity of deep loaded rocks according to claim 1, characterized in that: The six pressure heads (41) are connected together by at least eight highly elastic metal sheets (42).

7. The real-time testing system for three-dimensional thermal conductivity of deep loaded rock according to claim 1, characterized in that: A displacement detection mechanism (5) is provided between two pressure heads (41) in the same axial direction.

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