Rock expansion rate and expansion force testing device and method

Abstract

The invention provides a rock expansion rate and expansion force test device and method.The rock expansion rate and expansion force test device comprises a test bed, a test tool, a first test mechanism, a second test mechanism and a controller, when the rock expansion rate and expansion force test device is used, a rock sample core is clamped through the test tool and then placed in a soaking pool, and the test tool is immersed in water. The first testing mechanism can detect the expansion force, and the second testing mechanism can detect the deformation of the rock sample core after water absorption and expansion. The test tool comprises two connecting sleeves capable of being opened and closed and a sealing plate detachably arranged between the two connecting sleeves, and can adapt to rock sample cores with different diameters within a certain range, so that the inner wall of the test tool is more attached to the outer walls of the rock sample cores, the radial expansion degree of the rock sample cores after water absorption is reduced, and the test efficiency is improved. Therefore, the accuracy of test results is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rock swelling property testing, and particularly relates to a device and method for testing rock swelling rate and swelling force. Background Art

[0002] The testing of rock swelling rate and swelling force is a related test for swelling rock, which is used to test the degree of volume expansion of rock after absorbing water under specific conditions, and the acting force generated on the surrounding medium during the swelling process. When the rock swells due to water absorption, it will generate pressure on its surrounding environment or structure, etc. The ratio of the change in rock volume before and after swelling to the original volume represents the swelling rate, and the pressure generated during the swelling process represents the swelling force. When testing the rock swelling rate and swelling force, generally, the rock sample is placed under certain environmental conditions (such as specific water temperature, water pressure, etc.) to allow it to absorb water and swell, and then the swelling rate is determined by measuring the size change of the rock sample, and at the same time, the magnitude of the swelling force generated by the rock is measured through relevant mechanical testing devices (such as pressure sensors).

[0003] The testing of swelling rate and swelling force is of great significance for studying the swelling characteristics of rocks under different environmental conditions and their influence on engineering structures, etc. In the fields of water conservancy projects, geological projects, etc., understanding the swelling characteristics of rocks can help evaluate the stability and safety of projects.

[0004] Before testing the swelling property of rock, it is necessary to first obtain a rock core sample, then fix the rock core sample in the test tooling, and then immerse the test tooling in water, and monitor the swelling force and deformation through relevant detection instruments. The rock core sample is a sample obtained from natural rocks by the core drilling method, and its outer shape is cylindrical, with a diameter size of about 50 mm. Correspondingly, the inner diameter size of the test tooling is also 50 mm. However, due to the influence of factors such as the accuracy of the drilling tool for core drilling and the hardness of the rock during actual operation, the diameter size of the actually obtained rock core sample may be less than 50 mm, such as 49.6 mm. In this way, during the related test of swelling property, the gap between the rock core sample and the tooling causes the rock core sample to expand laterally, resulting in errors in the test results of the swelling force and deformation, and affecting the test accuracy.

[0005] The measures taken in the prior art to address the above problems are to fabricate multiple toolings with different diameter sizes, such as 49.1 mm, 49.2 mm,..., 50.00 mm, and select the corresponding specification tooling for clamping according to the actual size of the core sample. This method has high manufacturing costs, long time consumption, and wastes raw materials, manpower and material resources. Summary of the Invention

[0006] The present invention provides a device and method for testing the expansion rate and expansion force of rocks, aiming to solve the problem in the prior art that it is necessary to manufacture a plurality of toolings with different diameters for clamping rock cores, which is a waste of raw materials, manpower and material resources.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a device for testing the expansion rate and expansion force of rocks, comprising: A test bench having a loading platform, a soaking pool and a cantilever. The soaking pool is arranged on the loading platform. The soaking pool is communicated with a water inlet pipe and a water outlet pipe. The cantilever extends above the loading platform; A test tooling arranged in the soaking pool. The test tooling includes a connecting sleeve, a sealing plate and a connecting member. The number of the connecting sleeves is two, and the two connecting sleeves are movably connected. A receiving groove is respectively formed on one side of the two connecting sleeves facing each other. The receiving groove is a vertically arranged semi-cylindrical groove. An adjusting groove is vertically formed at the edge position of the receiving groove. The sealing plate is detachably inserted into the adjusting groove. A receiving space for accommodating the sealing plate is formed after the adjusting grooves of the two connecting sleeves are aligned. The connecting member is detachably connected between the two connecting sleeves for providing a pre-tightening force to make the two connecting sleeves close and clamp the sealing plate; A first testing mechanism arranged on the cantilever, including a liftable force sensor; A second testing mechanism arranged on the cantilever, including a liftable displacement sensor; and A controller, which is respectively communicatively connected with the first testing mechanism and the second testing mechanism.

[0008] In a possible implementation manner, the device for testing the expansion rate and expansion force of rocks further includes a water supply assembly, and the water supply assembly includes: A water tank, and the water outlet pipe is communicated with the water tank; and A water pump, the water inlet end of the water pump is communicated with the water tank, and the water outlet end of the water pump is communicated with the water inlet pipe.

[0009] In a possible implementation manner, a permeable cushion layer is arranged at the bottom of the soaking pool, and the test tooling is arranged above the permeable cushion layer; a permeable plate and a backing plate are sequentially arranged at the top of the test tooling.

[0010] In a possible implementation manner, one side of the two connecting sleeves is hinged through a rotating shaft, and the adjusting groove is formed on the other side.

[0011] In a possible implementation manner, the two connecting sleeves are detachably arranged, and the adjusting grooves are formed on both sides of the connecting sleeve.

[0012] In a possible implementation, water-permeable holes penetrating the wall thickness of the connection sleeve are provided, and water-permeable stones are arranged in the water-permeable holes.

[0013] In a possible implementation, the water-permeable stone is arranged at one end of the water-permeable hole adjacent to the rock core sample. An inlet bolt is arranged at the end of the water-permeable hole far from the rock core sample. The inlet bolt is a hollow bolt, and the inlet bolt is in threaded fit with the water-permeable hole. The end of the inlet bolt abuts against the water-permeable stone.

[0014] In a possible implementation, the test tooling further includes a handle. One end of the handle is detachably connected to one of the connection sleeves, and the other end of the handle is detachably connected to the other connection sleeve.

[0015] In a possible implementation, connection holes penetrating the thickness of the connection sleeve along the mating direction are provided. A plurality of connection holes are spaced apart in the height direction. The connecting members are bolts, and the bolts are respectively arranged in the connection holes.

[0016] Compared with the prior art, the beneficial effects of a rock expansion rate and expansion force testing device provided by the present invention are as follows: A rock expansion rate and expansion force testing device provided by the present invention includes a test bench, test tooling, a first testing mechanism, a second testing mechanism, and a controller. During use, after clamping a rock core sample through the test tooling, it is placed in an immersion pool, and the water submerges the test tooling. The first testing mechanism can detect the expansion force, and the second testing mechanism can detect the deformation amount of the rock core sample after water absorption and expansion. The test tooling includes two separable connection sleeves and a sealing plate detachably arranged between the two connection sleeves. The two connection sleeves are closed and clamped on the rock core sample through connecting members. The test tooling adopts a split structure design, and the sealing plate can be independently replaced. The sealing plate is used to be inserted into the adjustment groove. By pre-manufacturing a plurality of sealing plates with different specifications and sizes, rock core samples with different diameters can be adapted within a certain range, making the inner wall of the test tooling more fitting with the outer wall of the rock core sample, reducing the degree of lateral expansion of the rock core sample after water absorption, and thus improving the accuracy of the test results.

[0017] In a second aspect, the present invention provides a method for testing the expansion rate and expansion force of a rock, which is implemented by using the rock expansion rate and expansion force testing device described in any of the above implementations, and includes the following steps: Measure the actual size of the rock core sample, and select a sealing plate with a suitable specification according to the actual size of the rock core sample; Install the two connection sleeves and the sealing plate together through connecting members, place the rock core sample into the chamber enclosed by the connection sleeves and the sealing plate, and further tighten the connecting members to radially clamp the rock core sample by the connection sleeves and the sealing plate. Place the test tooling and the rock core sample into the immersion pool, and convey water into the immersion pool through the water inlet pipe until the water level reaches the specified liquid level height; Place the permeable plate and the metal backing plate above the rock core sample in sequence, control the movement of the first test mechanism or the second test mechanism, so that the force sensor or the displacement sensor reaches the specified position, and test the corresponding expansion force or deformation amount.

[0018] The rock expansion rate and expansion force test method provided by the present invention is realized by using the above-mentioned rock expansion rate and expansion force test device, and has the same technical effects, which will not be elaborated here. Description of the Drawings

[0019] The drawings here are incorporated into the description and form a part of this description, showing the embodiments in line with this application, and are used together with the description to explain the principles of this application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0022] Figure 1 It is a schematic structural diagram of a rock expansion rate and expansion force test device provided by an embodiment of this application; Figure 2 It is an internal cross-sectional view of a rock expansion rate and expansion force test device provided by an embodiment of this application; Figure 3 It is a schematic structure of the first embodiment of the test tooling in this application Figure 1 ; Figure 4 It is a schematic structure of the first embodiment of the test tooling in this application Figure 2 ; Figure 5 It is a cross-sectional view of the first embodiment of the test tooling in this application in the horizontal direction; Figure 6 It is a schematic structural diagram of the second embodiment of the test tooling in this application; Figure 7 It is an exploded assembly view of the second embodiment of the test tooling in this application; Description of the reference numerals in the drawings: 10. Test bench; 11. Loading platform; 12. Immersion pool; 121. Water inlet pipe; 122. Water outlet pipe; 123. Permeable cushion layer; 124. Permeable plate; 125. Pad; 13. Cantilever; 20. Test tooling; 21. Connecting sleeve; 211. Accommodating groove; 212. Adjusting groove; 213. Connecting hole; 22. Sealing plate; 23. Connecting piece; 24. Permeable stone; 25. Water inlet bolt; 26. Handle; 27. Rotating shaft; 30. Force sensor; 40. Displacement sensor; 50. Controller. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0024] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0025] For ease of description, spatially relative relationship terms may be used in the text to describe the relative position relationship or movement of one element or feature shown in the figure relative to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or attitude change or movement state change, then these directional indications will change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will then be oriented as "above other elements or features" or "on other elements or features". Therefore, the example term "below" can include both the upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0026] Please refer to Figures 1 to 7, a rock expansion rate and expansion force testing device and method provided by an embodiment of the present invention will be described below.

[0027] Please refer to Figures 1 to 5 , in the first aspect, an embodiment of the present invention provides a rock expansion rate and expansion force testing device, including a test bench 10, a test tooling 20, a first testing mechanism, a second testing mechanism, and a controller 50. The test bench 10 has a loading platform 11, a soaking pool 12, and a cantilever 13. The soaking pool 12 is arranged on the loading platform 11. The soaking pool 12 is communicated with a water inlet pipe 121 and a water outlet pipe 122. The cantilever 13 extends above the loading platform 11; the test tooling 20 is located in the soaking pool 12. The test tooling 20 includes a connecting sleeve 21, a sealing plate 22, and a connecting member 23. The number of connecting sleeves 21 is two, and the two connecting sleeves 21 are movably connected. On the mutually facing surfaces of the two connecting sleeves 21, accommodation grooves 211 are respectively provided. The accommodation grooves 211 are semi-cylindrical grooves arranged vertically. Adjusting grooves 212 are vertically provided at the edge positions of the accommodation grooves 211. The sealing plate 22 is detachably inserted into the adjusting grooves 212. After the adjusting grooves 212 of the two connecting sleeves 21 are aligned, a accommodation space for accommodating the sealing plate 22 is formed. The connecting member 23 is detachably connected between the two connecting sleeves 21 and is used to provide a pre-tightening force for aligning and clamping the sealing plate 22 by the two connecting sleeves 21; the first testing mechanism is arranged on the cantilever 13 and includes a liftable force sensor 30; the second testing mechanism is arranged on the cantilever 13 and includes a liftable displacement sensor 40; the controller 50 is respectively communicatively connected with the first testing mechanism and the second testing mechanism.

[0028] Compared with the prior art, the beneficial effects of a rock expansion rate and expansion force testing device provided by an embodiment of the present invention are: A rock expansion rate and expansion force testing device provided by an embodiment of the present invention includes a test bench 10, a test tooling 20, a first testing mechanism, a second testing mechanism, and a controller 50. During use, after the rock sample core is clamped through the test tooling 20, it is placed into the soaking pool 12, and the water submerges the test tooling. The first testing mechanism can detect the expansion force, and the second testing mechanism can detect the deformation amount of the rock sample core after water absorption and expansion. The test tooling 20 includes two openable connecting sleeves 21 and a sealing plate 22 detachably arranged between the two connecting sleeves 21. The two connecting sleeves 21 are closed and clamped on the rock sample core through the connecting member 23. The test tooling 20 adopts a split structure design, and the sealing plate 22 can be independently replaced. The sealing plate 22 is used to be inserted into the adjusting grooves 212. By pre-manufacturing a plurality of sealing plates 22 with different specifications and sizes, rock sample cores with different diameters can be adapted within a certain range, making the inner wall of the test tooling 20 more closely fit the outer wall of the rock sample core, reducing the degree of radial expansion of the rock sample core after water absorption, and thus improving the accuracy of the test results.

[0029] The test bench 10 includes a loading platform 11, a soaking pool 12, and a cantilever 13. The cantilever 13 can be arranged on the loading platform 11 through a column. The loading platform 11 is used to support the soaking pool 12, and the soaking pool 12 can be fixed or movable. The test tooling 20 includes two connecting sleeves 21, at least one sealing plate 22, and a connecting member 23. The connecting member 23 can be a hoop, a screw, a clamping block, etc., which are structures capable of clamping and fastening the two connecting sleeves 21. The connecting sleeve 21 has a receiving groove 211 in the shape of a semi-cylindrical surface, and an adjusting groove 212 located on one or both sides of the receiving groove 211. When in the unclamped state, the two connecting sleeves 21 can be completely separated or hinged at one end.

[0030] Specifically, the sealing plate 22 is strip-shaped. The side of the sealing plate 22 for fitting the rock core is a circular arc surface adapted to the outer wall of the rock core. When the sealing plate 22 is not installed, the diameter dimension of the two mating connecting sleeves 21 can be 49 mm, and the height is 100 mm. The width dimension of the two mating adjusting grooves 212 can be 10 mm. Different sizes of sealing plates 22 (such as 1.00 mm, 1.06 mm,..., 1.56 mm) are manufactured in advance according to the width dimension from large to small. In this way, after different sizes of sealing plates 22 are installed between the two connecting sleeves 21, clamping spaces with different diameter ranges of 49.00 mm, 49.10 mm, 49.20 mm,..., 51.90 mm, 52.00 mm can be formed according to the size from small to large for clamping rock cores with different diameters, which can better solve the sample diameter deviation in the actual drill bit drilling process and make the diameters of the test tooling 20 and the rock core more adaptable.

[0031] Both the connecting sleeve 21 and the sealing plate 22 can be made of steel, with high structural strength and not easily deformed or damaged. When the two connecting sleeves 21 are mated, their overall shape can be square, polygonal prism, cylindrical, etc.

[0032] The force sensor 30 of the first test mechanism is specifically a high-sensitivity pressure gauge, which is used to measure the swelling force of the rock core after absorbing water. When the sample absorbs water and generates a swelling force, this pressure gauge can accurately display and measure its swelling force. Different ranges of force sensors 30 can be configured according to the characteristics of the sample, including but not limited to: different ranges such as 1 kPa, 5 kPa, 10 kPa, 50 kPa, 100 kPa, etc., to ensure that the test requirements of accuracy and deformation amount are met.

[0033] The displacement sensor 40 of the second test mechanism is specifically a high-precision displacement sensor 40, which can move up and down telescopically to measure the swelling rate of the rock core after absorbing water. When performing the swelling rate or swelling force test, move the test tooling 20 below the corresponding displacement sensor 40 or force sensor 30, and then conduct the test. According to needs, the first test mechanism and the second test mechanism can also perform tests simultaneously.

[0034] On the one hand, the controller 50 can control the switches and operations of the high-sensitivity force sensor 30 and the high-precision displacement sensor 40. On the other hand, it can display and store the data of the sensors in real time, or transmit the data to a computer. At the same time, it can set the end standard of the test according to the specification requirements and automatically stop the test after reaching the end standard. It can also set the ringing, and can ring continuously to remind when there is a problem or the test ends.

[0035] In some possible embodiments, a rock expansion rate and expansion force test device further includes a water supply assembly, and the water supply assembly includes a water tank and a water pump. The water outlet pipe 122 is communicated with the water tank, and the excess water can flow back into the water tank; the water inlet end of the water pump is communicated with the water tank, and the water outlet end of the water pump is communicated with the water inlet pipe 121, which can keep the liquid level stable.

[0036] Please refer to Figure 2 , in some possible embodiments, a permeable cushion layer 123 is provided at the bottom of the immersion pool 12, and the test tooling 20 is arranged above the permeable cushion layer 123; a permeable plate 124 and a backing plate 125 are sequentially arranged on the top of the test tooling 20. During the test, the liquid level in the immersion pool 12 is higher than the permeable plate 124 and lower than the upper surface of the backing plate 125.

[0037] In order to prevent the loss of rock core particles, filter paper can be laid on the upper and lower surfaces of the rock core respectively, and kraft hard filter paper is wrapped around the periphery of the rock core. The thickness of the kraft hard filter paper is 0.1 mm, which has good water permeability and relatively hard texture. It can be used as a tight layer between the rock core and the test tooling 20 to limit the lateral expansion of the rock core after absorbing water.

[0038] The permeable cushion layer 123 is in contact with the bottom of the rock core, and the water in the immersion pool 12 enters the rock core through the permeable cushion layer 123 and the filter paper. The permeable cushion layer 123 can be made of metal or other materials that are not easily deformed. The permeable plate 124 is made of permeable stone 24 for water to penetrate from above, and the backing plate 125 can be a rigid member such as a metal block for contacting the sensing end of the sensor.

[0039] Please refer to Figure 3 , Figure 4 and Figure 5 , in the first embodiment, one side of the two connecting sleeves 21 is hinged through a rotating shaft 27, and an adjusting groove 212 is provided on the other side. Two sealing plates 22 are correspondingly provided for the adjusting groove 212. The two connecting sleeves 21 can rotate relative to each other around the rotating shaft 27 to realize opening and closing. In this case, there is one sealing plate 22.

[0040] Please refer to Figure 6 and Figure 7, in the second embodiment, the two connecting sleeves 21 are detachably arranged. Adjustment grooves 212 are formed on both sides of the connecting sleeve 21, and two sealing plates 22 are correspondingly arranged in the adjustment grooves 212.

[0041] As Figure 5 and Figure 7 shown, a water permeable hole penetrating through the wall thickness of the connecting sleeve 21 is formed on the connecting sleeve 21, and a water permeable stone 24 is arranged in the water permeable hole. The water permeable stone 24 can allow water to pass through, enabling the rock core sample to absorb water laterally.

[0042] One side of the water permeable stone 24 for fitting the rock core sample is an arc shape adapted to the outer shape of the rock core sample. The water permeable stone 24 can be designed in shapes such as square and triangle. One end of the water permeable hole adjacent to the rock core sample is adapted to the outer shape of the water permeable stone 24, and the water permeable stone 24 will not rotate and be misaligned after being placed in place.

[0043] Please refer to Figure 3 , Figure 6 and Figure 7 , the water permeable stone 24 is arranged at one end of the water permeable hole adjacent to the rock core sample, and a water inlet bolt 25 is arranged at the other end of the water permeable hole away from the rock core sample. The water inlet bolt 25 is a hollow bolt, and the water inlet bolt 25 is in threaded fit with the water permeable hole. The end of the water inlet bolt 25 abuts against the water permeable stone 24, enabling the water permeable stone 24 to fit against the outer wall of the rock core sample and restricting the lateral expansion of the rock core sample.

[0044] Please refer to Figure 3 , Figure 6 and Figure 7 , for the convenience of transferring the test tooling 20, the test tooling 20 further includes a handle 26. One end of the handle 26 is detachably connected to one of the connecting sleeves 21, and the other end of the handle 26 is detachably connected to the other connecting sleeve 21. After the rock core sample is fixed, it can be transferred through the handle 26. The handle 26 is detachably arranged and will not have an adverse impact on the test.

[0045] Please refer to Figure 3 and Figure 7 , the connecting sleeve 21 is provided with a connecting hole 213 penetrating through its own thickness along the mating direction. A plurality of connecting holes 213 are spaced at intervals in the height direction, and the connecting member 23 is a bolt, and the bolts are respectively arranged in the connecting holes 213 one by one.

[0046] In a second aspect, an embodiment of the present invention provides a method for testing the expansion rate and expansion force of a rock, which is implemented by using the above-mentioned device for testing the expansion rate and expansion force of a rock, and includes the following steps: Measure the actual size of the rock core sample, and select a sealing plate 22 with a suitable specification according to the actual size of the rock core sample.

[0047] Install two connecting sleeves 21 and a sealing plate 22 together through a connecting member 23. Wrap the outside of the rock core with hard kraft paper, and then place it into the chamber enclosed by the connecting sleeve 21 and the sealing plate 22.

[0048] Lay filter paper at the bottom of the rock core. Place the test tooling 20 and the rock core into the immersion pool 12. Lay filter paper, a permeable plate 124 and a backing plate 125 in sequence on the top of the rock core. Deliver water into the immersion pool 12 through the water inlet pipe 121 until the water level reaches the specified liquid level height.

[0049] Place the permeable plate 124 and the metal backing plate 125 in sequence above the rock core. Control the movement of the first test mechanism or the second test mechanism so that the force sensor 30 or the displacement sensor 40 reaches the specified position to test the corresponding swelling force or deformation amount.

[0050] During the test, collect data on the test structure through the controller 50. When the swelling force remains unchanged or the change complies with the specification or test requirements, the test is completed. Turn off the relevant equipment and disassemble the equipment.

[0051] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0054] In this application, unless otherwise clearly specified or limited, the terms "install", "connect", "link", "fix", etc. shall be understood in a broad sense. For example, it can be a connection, a detachable connection, or an integral body; 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 communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0057] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.

[0058] The above is the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A rock expansion rate and expansion force testing device, characterized in that: include: A test bench (10) comprises a loading platform (11), a water immersion pool (12) and a cantilever (13), wherein the water immersion pool (12) is arranged on the loading platform (11), the water immersion pool (12) is connected to a water inlet pipe (121) and a water outlet pipe (122), and the cantilever (13) extends above the loading platform (11); A test fixture (20) is arranged in the immersion tank (12), the test fixture (20) comprising a connecting sleeve (21), a sealing plate (22) and a connecting piece (23), the number of the connecting sleeves (21) being two, and the two connecting sleeves (21) being movably connected, a receiving groove (211) is respectively provided on one side of the two connecting sleeves (21) facing each other, the receiving groove (211) being a semi-cylindrical groove arranged vertically, an adjusting groove (212) is vertically provided at the edge of the receiving groove (211), the sealing plate (22) is detachably inserted into the adjusting groove (212), the adjusting grooves (212) of the two connecting sleeves (21) are matched to form a receiving space for receiving the sealing plate (22), the connecting piece (23) is detachably connected between the two connecting sleeves (21) and is used to provide a pre-tightening force for making the two connecting sleeves (21) face each other and clamping the sealing plate (22); A first testing mechanism, disposed on the cantilever (13), comprising a liftable force sensor (30); A second testing mechanism, provided on the cantilever (13), comprising a liftable displacement sensor (40); and A controller (50) is communicatively connected to the first testing mechanism and the second testing mechanism respectively.

2. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: The rock expansion rate and expansion force testing device further includes a water supply component, which includes: a water tank, the water outlet pipe (122) being in communication with the water tank; and A water pump, wherein a water inlet end of the water pump is connected to the water tank, and a water outlet end of the water pump is connected to the water inlet pipe (121).

3. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: A water-permeable cushion layer (123) is provided at the bottom of the immersion pool (12), and the test fixture (20) is arranged above the water-permeable cushion layer (123); a water-permeable plate (124) and a cushion plate (125) are sequentially provided at the top of the test fixture (20).

4. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: One side of the two connecting sleeves (21) is hinged via a rotating shaft (27), and the other side is provided with the adjusting groove (212).

5. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: The two connecting sleeves (21) are detachably arranged from each other, and the adjusting grooves (212) are provided on both sides of the connecting sleeves (21).

6. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: The connecting sleeve (21) is provided with a water-permeable hole penetrating through the thickness of the connecting sleeve, and a water-permeable stone (24) is arranged in the water-permeable hole.

7. A rock expansion rate and expansion force testing device according to claim 6, characterized in that: The permeable stone (24) is arranged at one end of the permeable hole adjacent to the rock sample core, and an inlet bolt (25) is arranged at one end of the permeable hole away from the rock sample core. The inlet bolt (25) is a hollow bolt. The inlet bolt (25) is threadedly engaged with the permeable hole, and the end of the inlet bolt (25) abuts against the permeable stone (24).

8. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: The test tool (20) further comprises a handle (26), one end of the handle (26) being detachably connected to one of the connecting sleeves (21), and the other end of the handle (26) being detachably connected to the other connecting sleeve (21).

9. A rock expansion rate and expansion force testing device according to claim 1, characterized in that: The connecting sleeve (21) is provided with a connecting hole (213) penetrating the thickness of the connecting sleeve along the mating direction, a plurality of connecting holes (213) are provided at intervals in the height direction, and the connecting members (23) are bolts, which are arranged in one-to-one correspondence in the connecting holes (213).

10. A method for testing rock expansion rate and expansion force, characterized in that: The method is implemented by using a rock expansion rate and expansion force testing device as described in any one of claims 1 to 9, comprising the following steps: Measuring the actual size of the rock sample core, and selecting a sealing plate (22) of appropriate specifications according to the actual size of the rock sample core; The two connecting sleeves (21) and the sealing plate (22) are assembled together through the connecting piece (23), and the rock sample core is placed in the chamber enclosed by the connecting sleeves (21) and the sealing plate (22); The test tool (20) and the rock sample core are placed in the immersion tank (12), and water is transported into the immersion tank (12) through the water inlet pipe (121) until the water level reaches a specified liquid level height; A permeable plate (124) and a metal pad (125) are placed in sequence above the rock sample core, and the first test mechanism or the second test mechanism is controlled to move so that the force sensor (30) or the displacement sensor (40) reaches a specified position, and the corresponding expansion force or deformation amount is tested.

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