Device for simulating disintegration of layered rock along bedding surface

Abstract

The utility model provides a device for simulating disintegration of layered rock along a bedding surface, and belongs to the field of rock and soil experiment devices. The device comprises a sample placing bin, a shell cover and a pressure measuring device, the sample placing bin is a container with a top opening, the sample placing bin comprises an enclosing plate and a bottom plate, the enclosing plate is perpendicular to the bottom plate, the shell cover is arranged at the opening end of the sample placing bin in a covering mode, and the pressure measuring device is arranged on the shell cover. And the pressure measuring device is arranged at the bottom in the sample placing bin. By adopting the device for simulating the disintegration of the lamellar rock along the bedding surface, provided by the embodiment of the utility model, the problem that the phenomenon that the lamellar rock is disintegrated into slices along the bedding surface is difficult to research in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of geotechnical experimental devices, and particularly relates to a device for simulating the disintegration of layered rocks along bedding planes. Background Art

[0002] Some fresh and unweathered thin-layered mudshales or muddy siltstones are relatively hard in texture and belong to the category of relatively hard rocks. The core just taken out from the borehole often has good integrity. Placed in the outdoor environment for only a few months, the core will disintegrate and crack along the bedding plane, and mostly in a thin sheet state. The thickness of the thin sheet is generally at the millimeter level.

[0003] Under the conditions of conventional rock slake durability tests, the specimen has to roll repeatedly in a sieve barrel. This dynamic disturbance will, on the one hand, accelerate the disintegration of the specimen, and on the other hand, make the specimen show a round and massive disintegration and fragmentation state, making it difficult to reproduce the phenomenon that the core of thin-layered mudshale or muddy siltstone disintegrates into thin sheets in the outdoor environment.

[0004] Using the standard slake durability test device in the specification cannot effectively study the principle of the disintegration of such rocks along the bedding plane, and cannot effectively measure the swelling force generated by the core disintegrating along the bedding plane, resulting in the inability to clearly explain the reason for the disintegration of thin-layered rocks into thin sheets along the bedding plane and its impact on the stability of underground engineering. Summary of the Utility Model

[0005] An embodiment of the utility model provides a device for simulating the disintegration of layered rocks along bedding planes, which can solve the problem in the prior art that it is difficult to study the phenomenon of thin-layered rocks disintegrating into thin sheets along bedding planes. The technical solution is as follows:

[0006] A device for simulating the disintegration of layered rocks along bedding planes includes: a sample placement bin, a shell cover, and a pressure measurement device.

[0007] The sample placement bin is a container with an open top. The sample placement bin includes an enclosing plate and a bottom plate, and the enclosing plate is perpendicular to the bottom plate.

[0008] The shell cover is covered on the open end of the sample placement bin, and the pressure measurement device is arranged at the bottom inside the sample placement bin.

[0009] Optionally, the sample placement bin is a cylindrical barrel-shaped structure.

[0010] Optionally, the shell cover includes a top plate, a circumferential side plate, and a pressure plate.

[0011] The pressure plate is arranged parallel to the top plate, the circumferential side plate is arranged perpendicular to the top plate, and the top plate is connected to the pressure plate through the circumferential side plate.

[0012] Optionally, a thread is provided on the periphery of the circumferential side plate, and a matching thread is provided on one side of the enclosing plate close to the opening end, and the circumferential side plate is threadedly connected to the enclosing plate.

[0013] Optionally, the enclosing plate is provided with holes.

[0014] Optionally, a plurality of the holes are uniformly distributed on the enclosing plate.

[0015] Optionally, the sample placement bin and the shell cover are made of transparent photosensitive resin.

[0016] Optionally, the pressure measuring device includes a force measuring spring and a retaining piece. The force measuring spring is arranged on the bottom plate in the sample placement bin, and the retaining piece is arranged on the force measuring spring.

[0017] Optionally, a scale bar matching the force measuring spring is provided on one side of the enclosing plate close to the bottom plate.

[0018] Optionally, the bottom plate is detachably connected to the enclosing plate.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0020] Compared with the related prior art, where the repeated rolling of the test sample through the sieve barrel disrupts the process of the layered rock disintegrating along the bedding plane, the device for simulating the disintegration of layered rock along the bedding plane provided by the present invention can place the layered rock sample in the sample placement bin for a non-disturbed static experiment, simulate the process of the layered rock sample disintegrating along the bedding plane in the outdoor environment, measure the expansion force of the sample through the pressure measuring device, and further study the phenomenon of the layered rock disintegrating into thin slices along the bedding plane. Using the device for simulating the disintegration of layered rock along the bedding plane provided by the present invention can effectively solve the problem that the phenomenon of thin-layered rock disintegrating into thin slices along the bedding plane cannot be studied in the prior art. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic cross-sectional view of the overall device provided by the present invention.

[0023] In the figure: 1 - sample placement bin; 11 - enclosing plate; 12 - bottom plate; 13 - hole; 14 - scale bar; 2 - shell cover; 21 - top plate; 22 - circumferential side plate; 23 - pressure plate; 3 - pressure measuring device; 31 - force-measuring spring; 32 - retaining piece. Detailed implementation mode

[0024] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe in detail the implementation modes of the present utility model in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic cross-sectional view of the overall device provided by the present utility model. According to Figure 1 A device for simulating the disintegration of layered rock along bedding planes shown includes: a sample placement bin 1, a shell cover 2, and a pressure measuring device 3.

[0026] The sample placement bin 1 is a container with an open top. The sample placement bin 1 includes an enclosing plate 11 and a bottom plate 12, and the enclosing plate 11 is perpendicular to the bottom plate 12.

[0027] The shell cover 2 is covered on the open end of the sample placement bin 1, and the pressure measuring device 3 is arranged at the bottom inside the sample placement bin 1.

[0028] Exemplarily, in an embodiment of the present utility model, a whole piece of layered rock sample with a suitable shape is placed in the sample placement bin 1. The layered rock sample is placed on the pressure measuring device 3, and the shell cover 2 is covered on the open end of the sample placement bin 1 to make the shell cover 2 fit and press tightly against the layered rock sample. At this time, the measurement result of the pressure measuring device 3 is the initial pressure state. After the device is left standing for a period of time, the measurement result of the pressure measuring device 3 is recorded. After standing for another period of time, the measurement result of the pressure measuring device 3 is recorded again. This cycle is repeated until the layered rock sample shows an obvious disintegrated and loose state, that is, it becomes multi-layered cake-like, and the measurement experiment ends. Then, the phenomenon of the disintegration of the layered rock along the bedding plane is analyzed and studied based on the periodic measurement results.

[0029] Compared with the prior related technologies, where the specimen is repeatedly rolled through a sieve barrel, disturbing the process of the disintegration of thin-layered rock along the bedding plane, the device for simulating the disintegration of layered rock along the bedding plane provided by the present utility model can conduct a non-disturbed static experiment by placing the layered rock sample in the sample placement bin, simulate the process of the disintegration of the layered rock sample along the bedding plane in the outdoor environment, measure the expansion force of the sample through the pressure measuring device, and further study the phenomenon of the disintegration of the layered rock into thin slices along the bedding plane. Using the device for simulating the disintegration of layered rock along the bedding plane provided by the present utility model can effectively solve the problem in the prior art that it is impossible to study the phenomenon of the disintegration of thin-layered rock into thin slices along the bedding plane.

[0030] Optionally, the sample placement bin 1 is a cylindrical barrel-shaped structure.

[0031] Exemplarily, in the embodiment of the present invention, rock strata samples are usually drilled out from the rock strata using a drill bit. The rock strata samples taken out from the borehole are mostly cylindrical structures. The sample placement bin 1 adopts a cylindrical barrel-shaped structure. The cylindrical barrel-shaped structure has a large opening and no sharp corners, which is convenient for filling layered rock samples. At the same time, adopting a cylindrical barrel-shaped structure, the expansion force exerted by the layered rock samples inside during the collapse and expansion process is more uniform, making the measurement results more accurate. The use of a cylindrical barrel-shaped structure for the sample placement bin 1 improves the accuracy of this device.

[0032] Optionally, the shell cover 2 includes a top plate 21, a circumferential side plate 22, and a pressure plate 23.

[0033] The pressure plate 23 is arranged parallel to the top plate 21, the circumferential side plate 22 is arranged perpendicular to the top plate 21, and the top plate 21 is connected to the pressure plate 23 through the circumferential side plate 22.

[0034] Exemplarily, in the embodiment of the present invention, when initially placing the layered rock sample, the operator can press the top plate 21 to make the pressure plate 23 contact and press the layered rock sample. By setting the pressure plate 23, it is convenient to apply a pressing force according to the shape of the placed layered rock sample, so that the shell cover 2 fits and presses the layered rock sample better. This not only makes the initial measurement result of the pressure measuring device 3 more accurate, but also improves the operation convenience of this device.

[0035] Optionally, the circumferential side plate 22 is provided with threads on the outside, and the inner side of the enclosing plate 11 near the opening end is provided with matching threads, and the circumferential side plate 22 is threadedly connected to the enclosing plate 11.

[0036] Exemplarily, in the embodiment of the present invention, after placing the layered rock sample in the sample placement bin 1, when the shell cover 2 is covered on the opening end of the sample placement bin 1 and presses the layered rock sample, a reverse force will be generated on the shell cover 2. The shell cover 2 and the enclosing plate 11 are threadedly connected, which can offset the reverse force generated by the layered rock sample on the shell cover 2 to a certain extent. At the same time, by rotating the shell cover 2, the distance between the cap 2 and the layered rock sample can be controlled, which is beneficial to fixing the layered rock sample in the sample placement bin 1. The threaded connection between the shell cover 2 and the enclosing plate 11 further improves the measurement result accuracy and operation convenience of this device.

[0037] Optionally, the enclosing plate 11 is provided with holes 13.

[0038] Exemplarily, in the embodiment of the present utility model, holes 13 are provided on the enclosing plate 11, which can enable water vapor to penetrate into the layered rock sample better, so as to be more in line with the state of the layered rock in the outdoor natural environment. By alternately placing this device in a water tank and an oven in a cyclic period, the wet-dry cycle of the layered rock sample can be carried out, so as to simulate the state of the layered rock sample in the outdoor natural environment. By setting the holes 13, the accuracy of the measurement results of this device is increased.

[0039] Optionally, a plurality of holes 13 are evenly distributed on the enclosing plate 11.

[0040] Exemplarily, in the embodiment of the present utility model, a plurality of holes 13 are evenly arranged on the side surface of the enclosing plate 11, which can enable the layered rock sample to come into more sufficient contact with water vapor when the device is placed in the water tank. By evenly arranging a plurality of holes 13, the accuracy of the measurement results of this device can be further improved.

[0041] Optionally, the sample placement chamber 1 and the shell cover 2 are made of transparent photosensitive resin.

[0042] Exemplarily, in the embodiment of the present utility model, the transparent photosensitive resin material has high transparency, which can make the produced device fully transparent and convenient for observing the experimental process. And by using the photosensitive resin 3D printing technology, complex shapes and microstructures can be manufactured quickly and precisely. The hollow holes and threaded structures in the device can be formed in one step. At the same time, the transparent photosensitive resin material has good chemical resistance and certain high-temperature resistance, and has corrosion resistance to some solvents and chemicals, which ensures the reliability of this device during the wet-dry cycle.

[0043] Optionally, the pressure measuring device 3 includes a force-measuring spring 31 and a retaining piece 32. The force-measuring spring 31 is arranged on the bottom plate 12 in the sample placement chamber 1, and the retaining piece 32 is arranged on the force-measuring spring 31.

[0044] Exemplarily, in the embodiment of the present utility model, the pressure measuring device 3 is composed of a force-measuring spring 31 and a retaining piece 32. When the experiment starts, the layered rock sample is placed on the retaining piece 32. At this time, the force-measuring spring 31 will have a compression amount, and this compression amount is the initial measurement result. As the experiment progresses, the layered rock sample gradually disintegrates and generates an expansion force. The expansion force further compresses the force-measuring spring 31 to generate a larger compression amount. By periodically recording the compression amount of the force-measuring spring 31, the measurement result of the expansion force of the layered rock sample can be obtained. By studying the measurement results, the phenomenon of the layered rock disintegrating into thin slices along the bedding plane can be further studied.

[0045] Optionally, a scale bar 14 matching the force-measuring spring 31 is provided on one side of the enclosing plate 11 close to the bottom plate 12.

[0046] Exemplarily, in the embodiment of the present invention, by providing the scale bar 14, the compression amount generated by the force-measuring spring 31 can be measured and recorded more accurately. Before the experiment starts, weights of different masses are sequentially placed on the baffle 32, and according to the compression amount of the force-measuring spring 31, the scale bar 14 is drawn on the side of the enclosing plate 11 close to the bottom plate 12. After the experiment starts, as the experiment progresses, the expansion force of the layered rock sample at different times can be accurately counted according to the readings on the scale bar 14. By providing the scale bar 14, the accuracy of the measurement results of this device is improved.

[0047] Optionally, the bottom plate 12 and the enclosing plate 11 are detachably connected.

[0048] Exemplarily, in the embodiment of the present invention, the bottom plate 12 and the enclosing plate 11 are also detachably connected by threads. When the experimental conditions permit, the pressure measuring device 3 can be replaced with an electronic pressure gauge or a gas pressure gauge, etc. The bottom plate 12 and the enclosing plate 11 are connected by threads, which facilitates the operation of replacing the pressure measuring device 3. At the same time, the threaded connection can prevent the bottom from falling off through the biting force between the threads when transporting this device, increasing the expandability and stability of this device.

[0049] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention pertains. The "first", "second" and similar terms used in the specification and claims of the present patent application for the invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including" and similar words mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0050] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for simulating the disintegration of layered rocks along bedding planes, characterized in that Comprising: A sample placement bin (1), a shell cover (2), and a pressure measurement device (3), The sample placement bin (1) is a container with an open top. The sample placement bin (1) includes an enclosing plate (11) and a bottom plate (12). The enclosing plate (11) is perpendicular to the bottom plate (12), The shell cover (2) is covered on the open end of the sample placement bin (1), and the pressure measurement device (3) is arranged at the bottom inside the sample placement bin (1).

2. The device for simulating the disintegration of layered rock along bedding planes according to claim 1, characterized in that, The sample placement bin (1) is a cylindrical barrel-shaped structure.

3. The device for simulating the disintegration of stratified rock along bedding planes according to claim 2, characterized in that The shell cover (2) includes a top plate (21), a circumferential side plate (22), and a pressure plate (23), The pressure plate (23) is arranged parallel to the top plate (21), the circumferential side plate (22) is arranged perpendicular to the top plate (21), and the top plate (21) is connected to the pressure plate (23) through the circumferential side plate (22).

4. A device for simulating the disintegration of stratified rock along bedding planes according to claim 3, characterized in that, Threads are provided on the outer periphery of the circumferential side plate (22), and matching threads are provided on one side of the enclosing plate (11) close to the open end. The circumferential side plate (22) is threadedly connected to the enclosing plate (11).

5. A device for simulating the disintegration of layered rock along bedding planes according to claim 1, characterized in that, Holes (13) are provided on the enclosing plate (11).

6. The apparatus for simulating the disintegration of layered rock along bedding planes according to claim 5, wherein A plurality of the holes (13) are evenly distributed on the enclosing plate (11).

7. A device for simulating the disintegration of layered rock along bedding planes according to claim 1, characterized in that, The sample placement bin (1) and the shell cover (2) are transparent photosensitive resin parts.

8. A device for simulating the disintegration of layered rock along bedding planes according to claim 1, characterized in that, The pressure measurement device (3) includes a force-measuring spring (31) and a retaining piece (32). The force-measuring spring (31) is arranged on the bottom plate (12) inside the sample placement bin (1), and the retaining piece (32) is arranged on the force-measuring spring (31).

9. The device for simulating the disintegration of layered rock along bedding planes according to claim 8, wherein A scale bar (14) matching the force-measuring spring (31) is provided on one side of the enclosing plate (11) close to the bottom plate (12).

10. A device for simulating the disintegration of layered rock along bedding planes according to claim 1, characterized in that, The bottom plate (12) is detachably connected to the enclosing plate (11).

Images