Anchor bolt mechanical properties test device

Abstract

The present application provides a mechanical property test device for anchor bolts, including a pressure-bearing cylinder, a confining pressure load loading system, a temperature control system, and an axial creep load loading system, wherein an anchor bolt body sample is suspended in the pressure-bearing cylinder, the anchor bolt of the anchor bolt body sample extends out of the pressure-bearing cylinder and is connected to the axial creep load loading system, and an axial creep load loading system is used to apply axial creep pressure to the anchor bolt body sample, so as to simulate the creep time effect during the anchor bolt pulling process; the confining pressure load loading system is connected to the pressure-bearing cylinder, and radial pressure and bottom pressure are applied to the anchor bolt body sample in the pressure-bearing cylinder through the confining pressure load loading system, so as to simulate the static stress field of the anchor bolt; the temperature control system adjusts the temperature required for the anchor bolt body sample test, so as to simulate the temperature environment of the anchor bolt. Through the joint action of the temperature control system, the confining pressure load loading system, and the axial creep load loading system, the mechanical property detection of the anchor bolt body sample under different temperature environments is realized.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical property detection of anchor rods, and in particular to a mechanical property testing device for anchoring anchor rods. Background Art

[0002] In order to ensure the safe and stable excavation of mining rock mass engineering, bolt support is widely used due to its high efficiency, simplicity and economy. When bolt support is carried out in jointed rock mass, the tangential bolts on the joint surface play a shearing role to prevent the surrounding rock from dislocation. Relying on the transmission of force between the anchoring interfaces, the bolts can inhibit the deformation of the surrounding rock in the axial direction and improve the state of the surrounding rock. Due to its own mineral rock properties, the rock mass presents more obvious creep characteristics than intact hard rock. With the passage of time, creep damage continues to accumulate, causing the anchor body to gradually break and weaken, resulting in a decrease in integrity. When its bearing capacity is reduced to the limit, it will cause the anchor body to become unstable. With the increasing number of deep underground mining and high-cold open-pit mining, the on-site temperature environment span of bolt support application is relatively large, but the effect of temperature on the anchoring effect of bolts is still unclear. Therefore, a new type of anchor bolt mechanical property test device is urgently needed to detect the mechanical properties of anchor bolts under different temperature environments. Summary of the invention

[0003] In view of the technical problems existing in the background technology, the present application provides a device for testing the mechanical properties of an anchor rod. The device for testing the mechanical properties of an anchor rod achieves the technical effect of detecting the mechanical properties of an anchor rod body sample under different temperature environments through the joint action of a temperature control system, a confining pressure load loading system and an axial creep load loading system.

[0004] The embodiment of the present application provides a mechanical property test device for anchor bolts, which tests the mechanical properties of anchor bolts through an anchor bolt body sample, wherein the anchor bolt body sample includes a surrounding rock matrix and an anchor bolt, an anchor hole is provided on the top of the surrounding rock matrix, the anchor bolt is placed in the anchor hole, and is anchored and bonded to the surrounding rock matrix through an anchoring agent, comprising:

[0005] A pressure-bearing cylinder, wherein a sealed cavity is provided in the pressure-bearing cylinder, the anchor rod body sample is suspended in the cavity, a first through hole is opened at the top of the pressure-bearing cylinder, and the anchor rod of the anchor rod body sample extends out of the pressure-bearing cylinder through the first through hole;

[0006] A confining pressure load loading system, the confining pressure load loading system is connected to the pressure-bearing cylinder and is used to transport the solution into the cavity and adjust the pressure of the solution;

[0007] A flexible water-blocking member, which is wrapped and arranged on the surrounding rock-like matrix of the anchor body sample, and is used to isolate the surrounding rock-like matrix from the solution;

[0008] A temperature control system, connected to the pressure-bearing cylinder, for adjusting the temperature of the solution;

[0009] An axial creep load loading system is provided on the pressure-bearing cylinder and connected to the anchor rod. The axial creep load loading system is used to apply an axial creep load to the anchor rod.

[0010] In the technical solution of the embodiment of the present application, axial creep pressure is applied to the anchor body sample through the axial creep load loading system to simulate the creep time effect during the anchor rod pulling process; radial pressure and bottom pressure are applied to the anchor body sample in the pressure tube through the confining pressure load loading system to simulate the static stress field of the anchor body; the temperature required for the anchor body sample test is adjusted through the temperature control system to simulate the storage temperature environment of the anchor body; therefore, under the joint action of the temperature control system, the confining pressure load loading system and the axial creep load loading system, the mechanical properties of the anchor body sample under different temperature environments are detected.

[0011] In some embodiments, an anchor rod temperature detection device is also included; an opening is provided at one end of the anchor rod extending out of the pressure cylinder, and the opening extends along the axial direction of the anchor rod toward the end of the anchor rod placed in the pressure cylinder, and the anchor rod temperature detection device penetrates into the anchor rod from the opening to detect the temperature of the anchor rod body sample.

[0012] In this embodiment, the actual temperature of the anchor body sample is detected in real time by the anchor rod temperature detection device provided in the anchor rod body sample, which can more accurately simulate the ambient temperature of the anchor rod during actual use, and further improve the accuracy of the anchor rod mechanical property testing device in testing the mechanical properties of the anchor rod.

[0013] In some embodiments, a heat preservation box is also included, and the pressure-bearing cylinder is arranged in the heat preservation box.

[0014] In this embodiment, by placing the pressure tube in an insulation box, the heat loss of the anchor body sample can be reduced during the test, so that the anchor body sample can always be maintained at a predetermined temperature, thereby ensuring the accuracy and reliability of the experimental data.

[0015] In some embodiments, the temperature control system is also connected to the incubator to adjust the temperature inside the incubator.

[0016] In this embodiment, the temperature in the heat preservation box is adjusted by a temperature control system so that the temperature in the heat preservation box and the temperature of the solution in the pressure tube can be kept balanced.

[0017] In some embodiments, the temperature control system includes a hot and cold exchanger, a hot and cold medium conduit, a driving motor and a hot and cold medium. One end of the hot and cold medium conduit is connected to the hot and cold exchanger, and the other end extends into the cavity. The hot and cold medium is placed in the hot and cold medium conduit, and the hot and cold medium is driven by the driving motor to flow in the hot and cold medium conduit.

[0018] In this embodiment, the circulating hot and cold media are heated or cooled by a hot and cold exchanger, which can not only more accurately control the temperature of the solution in the pressure cylinder, but also adjust the temperature of the solution in the pressure cylinder according to demand, thereby achieving the effect of simulating high temperature and low temperature environments at the same time.

[0019] In some embodiments, the type of solution in the pressure cylinder can be antifreeze.

[0020] In this embodiment, by using antifreeze liquid as the hydraulic solution in the pressure cylinder, the anchor bolt mechanical properties test device can simulate the ambient temperature of high-cold areas, which makes it easier to study the mechanical properties and influencing mechanisms of the anchor bolt under the combined effects of axial and confining pressures under different temperature environments.

[0021] In some embodiments, the cold and hot exchanger is provided with one or more groups of the cold and hot medium conduits, and the cold and hot medium conduits extend from the bottom end of the pressure-bearing cylinder into the cavity and extend toward the top end of the pressure-bearing cylinder.

[0022] In this embodiment, by extending the hot and cold medium conduits toward the top end of the pressure cylinder, the temperature control system can heat or cool the solution in the pressure cylinder more evenly.

[0023] In some embodiments, the axial creep load loading system includes a compression load sensor, a hydraulic loading device, a laser rangefinder and an anchor rod lock. The hydraulic loading device is arranged at the top of the pressure cylinder and connected to the anchor rod through the anchor rod lock. The hydraulic loading device is used to continuously apply an axial load to the anchor rod. The compression load sensor is arranged between the hydraulic loading device and the pressure cylinder to detect the axial load applied to the anchor rod by the hydraulic loading device. The laser rangefinder is arranged on the pressure cylinder to monitor the displacement of the hydraulic loading device.

[0024] In this embodiment, the anchor rod is fixed to the hydraulic loading device by an anchor rod lock, and hydraulic oil is pumped into the hydraulic loading device so that the hydraulic loading device can continuously apply a creep pull-out load to the anchor rod. In the process of the hydraulic loading device applying the load to the anchor rod, the creep pull-out load applied by the hydraulic loading device to the anchor rod is measured by a compression load sensor, and the displacement information of the hydraulic loading device is monitored by a laser rangefinder. Finally, the mechanical properties of the anchor rod can be clearly analyzed through the creep pull-out load and the displacement information of the hydraulic loading device.

[0025] In some embodiments, a gasket is further included. The gasket has a hemispherical structure and is disposed at the bottom end of the anchor body specimen.

[0026] In this embodiment, the hemispherical gasket makes the force on the bottom of the anchor body sample more uniform.

[0027] In some embodiments, the flexible water barrier is a heat shrink tube.

[0028] In this embodiment, the flexible water-blocking member can be heated to tightly wrap the anchor rod body sample with the flexible water-blocking member, which greatly reduces the difficulty of using the anchor rod mechanical property testing device.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the anchor bolt mechanical properties testing device in the embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Anchor rod body specimen; 11. Surrounding rock matrix; 12. Anchor rod; 13. Anchoring agent; 2. Pressure tube;

[0034] 21. Cavity; 3. Confining pressure load loading system; 4. Flexible water barrier; 5. Temperature control system;

[0035] 51. Cold and hot exchanger; 52. Cold and hot medium conduit; 53. Driving motor;

[0036] 6. Axial creep load loading system; 61. Compression load sensor; 62. Hydraulic loading device;

[0037] 63. Laser rangefinder; 64. Anchor bolt lock; 7. Anchor bolt temperature detection device; 8. Insulation box;

[0038] 9. Gasket. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] In order to ensure the safe and stable excavation of mining rock engineering, bolt support is widely used due to its high efficiency, simplicity and economy. When bolt support is carried out in jointed rock mass, the tangential bolts on the joint surface play a shearing role to prevent the surrounding rock from dislocation. Relying on the transmission of force between the anchoring interfaces, the bolts can inhibit the deformation of the surrounding rock in the axial direction and improve the state of the surrounding rock. Due to its own mineral rock properties, the rock mass shows more obvious creep characteristics than intact hard rock. With the passage of time, creep damage continues to accumulate, causing the anchor body to gradually break and weaken, resulting in a decrease in integrity. When its bearing capacity is reduced to the limit, it will cause the anchor body to become unstable. With the increasing number of deep underground mining and high-cold open-pit mining, the on-site temperature environment span of bolt support application is relatively large, but the effect of temperature on the anchoring effect of bolts is still unclear.

[0048] In order to solve the technical problem of how to detect the mechanical properties of anchor rods under different temperature environments through a new type of anchor rod mechanical properties testing device, the present application provides an anchor rod mechanical properties testing device, wherein the technical effect of detecting the mechanical properties of anchor rod body samples under different temperature environments is achieved through the joint action of a temperature control system, a confining pressure load loading system and an axial creep load loading system.

[0049] Figure 1 This is a schematic diagram of the structure of the anchor bolt mechanical properties testing device provided in the embodiment of the application.

[0050] In the process of detecting the mechanical properties of the anchor bolt, the anchor bolt to be tested is made into an anchor bolt body sample 1, and the mechanical properties of the anchor bolt to be tested are tested by the anchor bolt body sample 1. The anchor bolt body sample 1 mainly includes a surrounding rock-like matrix 11 and an anchor bolt 12. An anchor hole is opened on the top of the surrounding rock-like matrix 11, and the anchor is placed in the anchor hole, and is anchored and bonded to the surrounding rock-like matrix 11 through an anchoring agent 13. In the detection process, the anchor bolt body sample 1 is placed in the anchor bolt mechanical property test device disclosed in the present application, and the mechanical properties of the anchor bolt body sample 1 are tested by the anchor bolt mechanical property test device, thereby obtaining the mechanical properties of the anchor bolt.

[0051] In this embodiment, the anchor bolt mechanical property test device includes a pressure-bearing cylinder 2, a confining pressure load loading system 3, a flexible water-blocking member 4, a temperature control system 5 and an axial creep load loading system 6. A closed cavity 21 is provided in the pressure-bearing cylinder 2, and an anchor bolt body sample 1 is suspended in the cavity 21. A first through hole is provided at the top of the pressure-bearing cylinder 2, and an anchor bolt 12 of the anchor bolt body sample 1 extends out of the pressure-bearing cylinder 2 through the first through hole. The confining pressure load loading system 3 is connected to the pressure-bearing cylinder 2, and is used to transport a solution into the cavity 21 and adjust the pressure of the solution to the anchor bolt body sample 1. Pressure is applied to the side wall and the bottom at the same time, so as to be closer to the actual stress state of the anchor body; the flexible water-proof member 4 is wrapped on the surrounding rock matrix 11 of the anchor body sample 1, which is used to isolate the surrounding rock matrix 11 from the solution, and prevent the solution from penetrating into the surrounding rock matrix 11 and affecting the mechanical property detection of the anchor bolt; the temperature control system 5 is connected to the pressure tube 2, which is used to adjust the temperature of the solution; the axial creep load loading system 6 is set on the pressure tube 2 and connected to the anchor 12, and the axial creep load loading system 6 is used to apply an axial creep load to the anchor 12. Therefore, in actual use, the mechanical property detection of the anchor body sample 1 under different temperature environments is realized through the joint action of the temperature control system 5, the confining pressure load loading system 3 and the axial creep load loading system 6.

[0052] In the embodiment, axial creep pressure is applied to the anchor sample by the axial creep load loading system 6 to simulate the creep time effect during the pulling process of the anchor rod 12; the confining pressure load loading system 3 applies radial pressure and bottom pressure to the anchor sample in the pressure tube to simulate the static stress field of the anchor body; the temperature control system 5 adjusts the temperature required for the anchor sample test to simulate the storage temperature environment of the anchor body; during the experiment, the effects of ambient temperature changes, stress fields around the anchor body, creep time effects, etc. on the anchoring performance of the anchor rod 12 are taken into account at the same time, which greatly improves the accuracy of the detection of the mechanical properties of the anchor rod.

[0053] In the present embodiment, the anchor bolt mechanical property testing device comprises an anchor bolt temperature detection device 7; an opening is provided at one end of the anchor bolt 12 extending out of the pressure-bearing cylinder 2, and the opening extends toward the end of the anchor bolt 12 placed in the pressure-bearing cylinder 2, and the anchor bolt temperature detection device 7 extends into the anchor bolt 12 from the opening, and is used to detect the temperature of the anchor bolt body sample 1. During use, the temperature of the solution in the pressure-bearing cylinder 2 is regulated by the temperature control system 5, thereby realizing the control of the temperature environment of the anchor bolt body sample 1. In the present embodiment, the actual temperature of the anchor bolt body sample 1 is detected in real time by the anchor bolt temperature detection device 7 arranged in the anchor bolt body sample 1, which can more accurately simulate the ambient temperature of the anchor bolt during actual use, and further improve the accuracy of the anchor bolt mechanical property testing device in testing the mechanical properties of the anchor bolt.

[0054] In this embodiment, the anchor bolt mechanical property testing device also includes an insulation box 8, and the pressure tube 2 is arranged in the insulation box 8. The insulation box 8 isolates the temperature inside the insulation box 8 from the outside through its heat insulation performance, so that during the test, the anchor solid sample can always be maintained at a predetermined temperature, further ensuring the accuracy and reliability of the experimental data.

[0055] In this embodiment, the temperature control system 5 is also connected to the insulation box 8. The temperature inside the insulation box 8 is adjusted by the temperature control system 5 so that the temperature inside the insulation box 8 is balanced with the temperature of the solution in the pressure tube 2, further ensuring the accuracy and reliability of the experimental data.

[0056] In this embodiment, the temperature control system 5 includes a cold and hot exchanger 51, a cold and hot medium conduit 52, a driving motor 53 and cold and hot medium. One end of the cold and hot medium conduit 52 is connected to the cold and hot exchanger 51, and the other end extends into the cavity 21. The cold and hot medium is placed in the cold and hot medium conduit 52, and the cold and hot medium is driven by the driving motor 53 to flow in the cold and hot medium conduit 52. The cold and hot exchanger 51, the driving motor 53 and the cold and hot medium conduit 52 are arranged in series to form a heat exchange cycle, thereby realizing the control of the solution temperature in the pressure cylinder 2.

[0057] Secondly, compared with traditional electric heating devices, in this embodiment, the circulating hot and cold media are heated or cooled by the hot and cold exchanger 51, which can not only more accurately control the temperature of the solution in the pressure cylinder 2, but also adjust the temperature of the solution in the pressure cylinder 2 according to needs, thereby achieving the effect of simulating high temperature environment and low temperature environment at the same time.

[0058] On this basis, in this embodiment, the type of solution can be selected as antifreeze, which is a solution that can remain in a liquid state under low temperature conditions. By using antifreeze as the hydraulic solution in the pressure cylinder 2, the anchor bolt mechanical properties test device can simulate the ambient temperature of high-cold areas, which makes it easier to study the mechanical properties and influencing mechanisms of the anchor bolt under the combined action of axial and confining pressures under different temperature environments.

[0059] In this embodiment, one or more groups of cold and hot medium pipes 52 are provided on the cold and hot exchanger 51. The cold and hot medium pipes 52 extend from the bottom end of the pressure cylinder 2 into the cavity 21 and extend toward the top end of the pressure cylinder 2, so that the temperature control system 5 can heat or cool the solution in the pressure cylinder 2 more evenly.

[0060] In this embodiment, the axial creep load loading system 6 includes a pressure load sensor 61, a hydraulic loading device 62, a laser rangefinder 63 and an anchor lock 64. The hydraulic loading device 62 is arranged at the top of the pressure cylinder 2 and is connected to the anchor 12 through the anchor lock 64. The hydraulic loading device 62 is used to continuously apply an axial load to the anchor 12. The pressure load sensor 61 is arranged between the hydraulic loading device 62 and the pressure cylinder 2, and is used to detect the axial load applied to the anchor 12 by the hydraulic loading device 62. The laser rangefinder 63 is arranged on the pressure cylinder 2, and is used to monitor the displacement of the hydraulic loading device 62.

[0061] During use, the anchor rod 12 is fixed to the hydraulic loading device 62 by the anchor rod lock 64, and hydraulic oil is pumped into the hydraulic loading device 62 so that the hydraulic loading device 62 can continuously apply a creep pull-out load to the anchor rod 12. In the process of the hydraulic loading device 62 applying the load to the anchor rod 12, the creep pull-out load applied by the hydraulic loading device 62 to the anchor rod 12 is measured by the pressure load sensor 61, and the displacement information of the hydraulic loading device 62 is monitored by the laser rangefinder 63. Finally, the mechanical characteristics of the anchor rod can be clearly analyzed through the creep pull-out load and the displacement information of the hydraulic loading device 62.

[0062] In this embodiment, the anchor bolt mechanical property testing device further includes a gasket 9 which is hemispherical in structure and is arranged at the bottom end of the anchor bolt body sample 1. The hemispherical gasket 9 makes the force on the bottom of the anchor body sample more uniform.

[0063] In this embodiment, the flexible water-blocking member 4 is a heat-shrinkable tube. The use of a heat-shrinkable tube as the flexible water-blocking member 4 not only has the characteristics of insulation, corrosion resistance, and wear resistance, but also when the flexible water-blocking member 4 is put on the anchor body sample 1, the flexible water-blocking member 4 can be heated to tightly wrap the anchor body sample 1, thereby greatly reducing the difficulty of using the anchor bolt mechanical property test device.

[0064] The specific usage is as follows:

[0065] Step 1: Prepare the anchor body sample; use a specific mold to cast a surrounding rock matrix 11 with a reserved anchor hole, open a groove of a certain length in the anchor rod 12 to bury the temperature sensor in advance, and after the surrounding rock matrix 11 is successfully cured, insert the anchor rod 12 vertically into the reserved anchor hole in the middle, and fill the void space in the reserved anchor hole with an anchoring agent, and cure for a certain period of time to obtain the anchor body sample;

[0066] Step 2: Place the hemispherical pad at the bottom of the anchor sample, use a flexible water-blocking piece 4 to cover the hemispherical pad, the anchor sample and the sealing pad, and use a hot air gun to heat the flexible water-blocking piece 4 to make them fit tightly;

[0067] Step 3: placing the anchor sample in the cavity 21 in the pressure tube 2, hanging the anchor sample on the top of the pressure tube 2, and allowing the anchor rod 12 of the anchor sample to extend through the first through hole on the pressure tube 2;

[0068] Step 4: The anchor rod 12 extending out of the pressure-bearing cylinder 2 passes through the hydraulic loading device 62 and is fixedly connected to the hydraulic loading device 62 through the anchor rod lock 64;

[0069] Step 5: Control the confining pressure load loading system 3 to continuously input the antifreeze liquid into the pressure-bearing cylinder 2 until the pressure-bearing cylinder 2 is completely filled with the antifreeze liquid;

[0070] Step 6: Turn on the cold and hot exchanger 51 and the drive motor 53, adjust the temperature of the heat exchange medium in the cold and hot medium conduit 52, increase / decrease the temperature inside and outside the pressure-bearing cylinder 2 through the cold and hot medium conduit 52 arranged in the inner cavity of the pressure-bearing cylinder and the heat preservation box 8, monitor the temperature of the anchor body sample in real time through the temperature sensor, and when the temperature of the anchor body sample reaches the predetermined temperature value required for the test, control the cold and hot exchanger 51 and the drive motor 53 to keep the temperature of the anchor body sample at the predetermined temperature value;

[0071] Step 7: Set the confining pressure load required for the test, control the confining pressure load loading system 3 to adjust the hydraulic pressure of the solution in the pressure tube 2, and then apply radial confining pressure and bottom pressure to the anchor body sample through the antifreeze liquid. When the confining pressure load reaches the predetermined value required for the test, stop pressurizing through the confining pressure load loading system 3 and keep the confining pressure constant.

[0072] Step eight: By pumping hydraulic oil into the hydraulic loading device 62, the hydraulic loading device 62 can continuously apply a creep pull-out load to the anchor rod 12, and the applied pull-out load is measured by the compression load sensor 61. The displacement of the anchor rod 12 during the pulling process is measured by the laser rangefinder 63. Finally, the mechanical properties of the anchor rod can be clearly analyzed through the creep pull-out load and the displacement information of the hydraulic loading device 62.

[0073] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. An anchor bolt mechanical property test device, which tests the mechanical properties of the anchor bolt through an anchor bolt body sample, wherein the anchor bolt body sample comprises a surrounding rock matrix and an anchor bolt, an anchor hole is opened on the top of the surrounding rock matrix, the anchor bolt is placed in the anchor hole, and is anchored and bonded to the surrounding rock matrix through an anchoring agent, characterized in that: include: A pressure-bearing cylinder, wherein a sealed cavity is provided in the pressure-bearing cylinder, the anchor rod body sample is suspended in the cavity, a first through hole is opened at the top of the pressure-bearing cylinder, and the anchor rod of the anchor rod body sample extends out of the pressure-bearing cylinder through the first through hole; A confining pressure load loading system, the confining pressure load loading system is connected to the pressure-bearing cylinder and is used to transport the solution into the cavity and adjust the pressure of the solution; A flexible water-blocking member, which is wrapped and arranged on the surrounding rock-like matrix of the anchor body sample, and is used to isolate the surrounding rock-like matrix from the solution; A temperature control system, connected to the pressure-bearing cylinder, for adjusting the temperature of the solution; An axial creep load loading system, wherein the axial creep load loading system is arranged on the pressure-bearing cylinder and connected to the anchor rod, and the axial creep load loading system is used to apply an axial creep load to the anchor rod; Among them, the temperature control system includes a hot and cold exchanger, a hot and cold medium conduit, a driving motor and a hot and cold medium. One end of the hot and cold medium conduit is connected to the hot and cold exchanger, and the other end extends into the cavity. The hot and cold medium is placed in the hot and cold medium conduit, and the hot and cold medium is driven by the driving motor to flow in the hot and cold medium conduit. The solution is antifreeze.

2. The anchor bolt mechanical property testing device according to claim 1, characterized in that: It also includes an anchor rod temperature detection device; an opening is provided at one end of the anchor rod extending out of the pressure-bearing cylinder, and the opening extends along the axial direction of the anchor rod toward the end of the anchor rod placed in the pressure-bearing cylinder. The anchor rod temperature detection device penetrates into the anchor rod from the opening to detect the temperature of the anchor rod body sample.

3. The anchor bolt mechanical property testing device according to claim 1, characterized in that: It also includes a heat preservation box, and the pressure-bearing cylinder is arranged in the heat preservation box.

4. The anchor bolt mechanical property testing device according to claim 3, characterized in that: The temperature control system is also connected to the incubator and is used to adjust the temperature in the incubator.

5. The anchor bolt mechanical property testing device according to claim 1, characterized in that: The cold and hot exchanger is provided with one or more groups of cold and hot medium conduits, and the cold and hot medium conduits extend from the bottom end of the pressure-bearing cylinder into the cavity and extend toward the top end of the pressure-bearing cylinder.

6. The anchor bolt mechanical property testing device according to claim 1, characterized in that: The axial creep load loading system includes a compression load sensor, a hydraulic loading device, a laser rangefinder and an anchor lock. The hydraulic loading device is arranged at the top of the pressure cylinder and connected to the anchor through the anchor lock. The hydraulic loading device is used to continuously apply an axial load to the anchor. The compression load sensor is arranged between the hydraulic loading device and the pressure cylinder to detect the axial load applied to the anchor by the hydraulic loading device. The laser rangefinder is arranged on the pressure cylinder to monitor the displacement of the hydraulic loading device.

7. The anchor bolt mechanical property testing device according to claim 1, characterized in that: It also includes a gasket, which is in a hemispherical structure and is arranged at the bottom end of the anchor body sample.

8. The anchor bolt mechanical property testing device according to claim 1, characterized in that: The flexible water-blocking member is a heat-shrinkable tube.

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