Coal rock strength parameter cleavage test simulation device

Abstract

The application discloses a coal rock strength parameter splitting test simulation device, which comprises an outer cylinder, an inlet and outlet liquid pipe arranged on the outer cylinder and used for adjusting the liquid pressure in the outer cylinder, an inner membrane arranged in the inner part of the outer cylinder and kept a certain gap with the outer cylinder, a plurality of splitting pipes embedded in the outer cylinder, one end of the splitting pipes being communicated with a pressure control pipe and the other end being connected to the outer surface of the inner membrane, and a first sealing assembly and a second sealing assembly, wherein the first sealing assembly is used for sealing one end of the outer cylinder and the inner membrane, and the second sealing assembly is used for sealing the other end of the outer cylinder and the inner membrane.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of splitting test, in particular to a coal rock strength parameter splitting test simulation device. BACKGROUND

[0002] Coal rock strength parameters can usually be obtained by splitting test, which simulates the crack propagation behavior of coal rock under stress. However, the existing splitting test simulation device has some problems. First, the existing splitting test simulation device needs to frequently replace the coal rock sample during the test, which is relatively cumbersome. Second, the existing splitting test simulation device cannot accurately simulate the coal rock strength in actual conditions. Coal rock is subjected to various mechanical effects under geological conditions, such as water pressure, rock mass fracture, etc. However, the existing simulation device cannot truly reproduce the strength of coal rock under complex stress environment.

[0003] Therefore, it is necessary to provide a coal rock strength parameter splitting test simulation device to solve the above problems. SUMMARY

[0004] To achieve the above purpose, the present application provides the following technical scheme: a coal rock strength parameter splitting test simulation device, comprising:

[0005] An outer cylinder, which is provided with an inlet and outlet pipe for adjusting the liquid pressure in the outer cylinder;

[0006] An inner membrane located inside the outer cylinder and maintaining a certain gap with the outer cylinder, the inner membrane is used to load the columnar coal rock to be tested;

[0007] A plurality of splitting tubes embedded in the outer cylinder, one end of which is connected to the pressure control pipe, and the other end is connected to the outer surface of the inner membrane; and

[0008] A first sealing assembly and a second sealing assembly, wherein the first sealing assembly is used to seal one end of the outer cylinder and the inner membrane, and the second sealing assembly is used to seal the other end of the outer cylinder and the inner membrane.

[0009] Further, as a preferred, a plurality of the splitting tubes are constructed as three groups distributed along the axial direction of the outer cylinder, and each group is a plurality of tubes distributed along the circumferential direction of the outer cylinder.

[0010] Further, as a preferred, a guide sealing ring is fixed inside the two end portions of the inner membrane.

[0011] Further, as a preferred, a support rod is fixed outside the two end portions of the inner membrane, and the other end of the support rod is supported on the inner wall of the outer cylinder.

[0012] Further, as a preferred, the first sealing assembly and the second sealing assembly have the same structure, and each includes:

[0013] limiting seat

[0014] a sliding seat, which is slidingly arranged on the limiting seat and has the same axial direction as the outer cylinder

[0015] a mounting seat, which is fixed on the sliding seat

[0016] an arm body, which is fixed on the mounting seat

[0017] a sealing groove, which is fixed on the arm body and has a central axis arranged in line with the central axis of the outer cylinder so as to seal the outside of the outer cylinder; and

[0018] a pressurizing disc, which is detachably fixed inside the sealing groove and has a central axis arranged in line with the central axis of the sealing groove so as to be embedded in the inside of the inner membrane.

[0019] Further, as a preferred embodiment, a seepage chamber is embedded in the pressurizing disc, the surface of the seepage chamber near the outer cylinder is flush with the surface of the pressurizing disc near the outer cylinder, a plurality of seepage holes are arranged on the surface of the seepage chamber near the outer cylinder, the seepage holes are communicated to the inside of the seepage chamber, and the seepage chamber is communicated with a tank, which is fixed on the mounting seat.

[0020] Further, as a preferred embodiment, a splitting rod is slidingly arranged in the pressurizing disc, the sliding direction of the splitting rod is the same as the axial direction of the outer cylinder, the splitting rod is driven by a driving member, and the driving member is arranged in the mounting seat.

[0021] Further, as a preferred embodiment, the pressure control pipe is connected with a first hydraulic controller, the inlet and outlet pipe is connected with a second hydraulic controller, and the number of the pressure control pipes is n, wherein the hydraulic pressure in m pressure control pipes is equal to the hydraulic pressure in the inlet and outlet pipe, and the hydraulic pressure in n-m pressure control pipes is greater than the hydraulic pressure in the inlet and outlet pipe (n and m are integers greater than 1, and n-m is greater than 0).

[0022] Further, as a preferred embodiment, the outer cylinder and the inner membrane are both transparent materials.

[0023] Compared with the prior art, the coal rock strength parameter splitting test simulation device has the following beneficial effects:

[0024] In the embodiment, the space formed by the first sealing assembly, the second sealing assembly and the inner membrane can seal the columnar coal rock to be tested, and the first sealing assembly and the second sealing assembly can also provide axial pressure for the columnar coal rock.

[0025] The space formed between the first sealing assembly, the second sealing assembly, the inner membrane and the outer cylinder can be filled with oil, so as to provide confining pressure for the columnar coal rock.

[0026] In the embodiment of the present application, the columnar coal rock is provided with axial pressure and confining pressure to simulate various mechanical effects of the coal rock under geological conditions, and then the hydraulic pressure in the pressure control pipe is adjusted to simulate the splitting test.

[0027] In the embodiment of the present application, the first sealing assembly and the second sealing assembly can quickly realize positioning, locking and unlocking of the outer cylinder, so as to improve the replacement efficiency of the columnar coal rock and simplify the replacement process. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is a plane structure schematic view of a coal rock strength parameter splitting test simulation device.

[0029] Fig. 2 It is a three-dimensional structure schematic view of a coal rock strength parameter splitting test simulation device.

[0030] Fig. 3 It is a structure schematic view of an outer cylinder and an inner membrane in a coal rock strength parameter splitting test simulation device.

[0031] Fig. 4 It is a plane structure schematic view of a first sealing assembly in a coal rock strength parameter splitting test simulation device.

[0032] Fig. 5 It is a three-dimensional structure schematic view of a first sealing assembly in a coal rock strength parameter splitting test simulation device.

[0033] In the figure: 1, outer cylinder; 2, inner membrane; 3, splitting pipe; 4, first sealing assembly; 5, second sealing assembly; 6, base; 7, positioning seat; 8, pressure control pipe; 9, inlet and outlet liquid pipe; 10, limiting seat; 11, sliding seat; 12, mounting seat; 13, arm body; 14, sealing groove; 15, pressurizing disc; 16, seepage bin; 17, tank body; 18, splitting rod; 19, driving piece. DETAILED DESCRIPTION

[0034] Please refer to Figs. 1-5 The present application provides a coal rock strength parameter splitting test simulation device, which comprises:

[0035] The outer cylinder 1 is installed on the positioning seat 7, and the positioning seat 7 is positioned on the base 6. The outer cylinder 1 is provided with an inlet and outlet liquid pipe 9 for adjusting the liquid pressure in the outer cylinder 1.

[0036] An inner membrane 2 is located inside the outer cylinder 1 and maintains a certain gap with the outer cylinder 1, the inner membrane 2 is used to load the columnar coal rock to be tested, and the inner membrane 2 is flexible and can transmit external force to the columnar coal rock to be tested;

[0037] A plurality of split tubes 3 are embedded in the outer cylinder 1, one end of the split tube 3 is connected with the pressure control tube 8, and the other end is connected to the outer surface of the inner membrane 2; and

[0038] A first sealing assembly 4 and a second sealing assembly 5 are mounted on the base 6, wherein the first sealing assembly 4 is used to seal one end of the outer cylinder 1 and the inner membrane 2, and the second sealing assembly 5 is used to seal the other end of the outer cylinder 1 and the inner membrane 2.

[0039] That is, in the embodiment, the space formed between the first sealing assembly 4, the second sealing assembly 5 and the inner membrane can seal the columnar coal rock to be tested, and the first sealing assembly 4 and the second sealing assembly 5 can also provide axial pressure for the columnar coal rock when sealing the end of the columnar coal rock. In fact, the space formed between the first sealing assembly 4, the second sealing assembly 5, the inner membrane 2 and the outer cylinder 1 can be filled with oil to provide confining pressure for the columnar coal rock. Such arrangement can simulate various mechanical effects of the coal rock under geological conditions, and then the simulation of the splitting test can be realized by adjusting the hydraulic pressure in the pressure control tube.

[0040] As a preferred embodiment, a plurality of split tubes 3 are arranged in three groups along the axial direction of the outer cylinder 1, and each group is arranged in a plurality of split tubes 3 along the circumferential direction of the outer cylinder 1.

[0041] In fact, the pressure control tube 8 is connected with a first hydraulic controller, the inlet and outlet liquid pipe 9 is connected with a second hydraulic controller, the number of the pressure control tube 8 is n, and the hydraulic pressure in m pressure control tubes 8 is equal to the hydraulic pressure in the inlet and outlet liquid pipe 9, and the hydraulic pressure in n-m pressure control tubes 8 is greater than the hydraulic pressure in the inlet and outlet liquid pipe 9 (n, m are integers greater than 1, and n-m is greater than 0);

[0042] It should be noted that the hydraulic pressure in each pressure control tube 8 is independently controlled and adjusted, and the hydraulic pressure in the pressure control tube 8 acts on the corresponding inner membrane 2 and is transmitted to the columnar coal rock to be tested. That is, by adjusting the hydraulic pressure in the pressure control tube 8, the force effect on the columnar coal rock to be tested can be simulated, and the splitting test can be completed;

[0043] And, since a plurality of split tubes 3 are arranged, the plurality of split tubes 3 are arranged in three groups along the axial direction of the outer cylinder 1, and each group is arranged in a plurality of split tubes 3 along the circumferential direction of the outer cylinder 1, so that the splitting test of the columnar coal rock to be tested at different positions, different angles, different force quantities and different force sizes can be realized.

[0044] Further, the outer cylinder 1 and the inner membrane 2 are both transparent materials, so that the real-time situation of the columnar coal rock to be tested can be directly observed from the outside;

[0045] In addition, in actual implementation, the temperature of the oil entering the outer cylinder 1 can also be adjusted, for example, a temperature control mechanism is arranged at the position of the liquid inlet and outlet pipe 9, and the like, which will not be described here.

[0046] In order to improve the sealing effect between the inner membrane 2 and the first sealing assembly 4 and the second sealing assembly 5, a guide sealing ring is fixed to the inner side of the two end portions of the inner membrane 2.

[0047] In order to improve the sealing effect between the inner membrane 2 and the first sealing assembly 4 and the second sealing assembly 5, a support rod is fixed to the outer side of the two end portions of the inner membrane 2, and the other end of the support rod is supported on the inner wall of the outer cylinder 1.

[0048] In the embodiment, the first sealing assembly 4 and the second sealing assembly 5 have the same structure, both including:

[0049] a limiting seat 10;

[0050] a sliding seat 11, which is slidingly arranged on the limiting seat 10, and the sliding direction of the sliding seat 11 is the same as the axial direction of the outer cylinder 1;

[0051] a mounting seat 12, which is fixed to the sliding seat 11;

[0052] an arm body 13, which is fixed to the mounting seat 12;

[0053] a sealing groove 14, which is fixed to the arm body 13, and the central axis of the sealing groove 14 is arranged in line with the central axis of the outer cylinder 1, so that the sealing groove 14 is arranged outside the outer cylinder 1; and

[0054] a pressurizing disc 15, which is detachably fixed inside the sealing groove 14, and the central axis of the pressurizing disc 15 is arranged in line with the central axis of the sealing groove 14, so that the pressurizing disc 15 is embedded inside the inner membrane 2.

[0055] The pressurizing disc 15 corresponds to the guide sealing ring;

[0056] In implementation, when the sliding seat 11 is driven to move towards the outer cylinder 1, the sealing groove 14 can be gradually sealed and arranged outside the outer cylinder 1, and the pressurizing disc 15 can be gradually sealed and embedded in the guide sealing ring. Conversely, the sealing groove 14 can gradually release the sealing of the outer cylinder 1, and the pressurizing disc 15 can gradually release the sealing of the guide sealing ring, so as to replace the columnar coal rock to be tested.

[0057] In the embodiment, the pressurizing plate 15 is embedded with a seepage bin 16, the surface of the seepage bin 16 close to one side of the outer cylinder 1 is flush with the surface of the pressurizing plate 15 close to one side of the outer cylinder 1, the surface of the seepage bin 16 close to one side of the outer cylinder 1 is provided with a plurality of seepage holes, the seepage holes are communicated to the inside of the seepage bin 16, and the seepage bin 16 is also communicated with a tank body 17, and the tank body 17 is fixed on the mounting seat 12.

[0058] It should be explained that the tank body 17 in the first sealing assembly 4 can be used to provide liquid to the columnar coal rock to be tested, and the tank body in the second sealing assembly 5 can be used to provide gas to the columnar coal rock to be tested, and the two can be matched to further simulate the actual state of the coal rock in the formation.

[0059] In the embodiment, the pressurizing plate 15 is embedded with a seepage bin 16, the surface of the seepage bin 16 close to one side of the outer cylinder 1 is flush with the surface of the pressurizing plate 15 close to one side of the outer cylinder 1, the surface of the seepage bin 16 close to one side of the outer cylinder 1 is provided with a plurality of seepage holes, the seepage holes are communicated to the inside of the seepage bin 16, and the seepage bin 16 is also communicated with a tank body 17, and the tank body 17 is fixed on the mounting seat 12.

[0060] The seepage bin 16 can also simulate the seepage test from the axial direction of the columnar coal rock to be tested.

[0061] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A coal and rock strength parameter splitting test simulation device, characterized in that: include: The outer cylinder (1) is provided with inlet and outlet pipes (9) for adjusting the liquid pressure inside the outer cylinder (1); The inner membrane (2) is located inside the outer cylinder (1) and maintains a certain gap with the outer cylinder (1). The inner membrane (2) is used to load the columnar coal rock to be tested. Multiple split tubes (3) are embedded in the outer cylinder (1), one end of which is connected to the pressure control tube (8), and the other end is connected to the outer surface of the inner membrane (2); A first sealing assembly (4) and a second sealing assembly (5), wherein the first sealing assembly (4) is used to seal one end of the outer cylinder (1) and the inner membrane (2), and the second sealing assembly (5) is used to seal the other end of the outer cylinder (1) and the inner membrane (2); The first sealing assembly (4) and the second sealing assembly (5) have the same structure, both including: Limiting seat (10); A slide (11) is slidably disposed on the limiting seat (10), and the sliding direction of the slide (11) is the same as the axial direction of the outer cylinder (1); Mounting base (12), which is fixed to the slide (11); Arm body (13), which is fixed to the mounting base (12); A sealing groove (14) is fixed to the arm body (13), and the central axis of the sealing groove (14) is collinear with the central axis of the outer cylinder (1) so as to seal the outside of the outer cylinder (1); and The pressure plate (15) is detachably fixed inside the sealing groove (14), and the central axis of the pressure plate (15) is collinear with the central axis of the sealing groove (14) so ​​as to be sealed and embedded inside the inner membrane (2); A splitting rod (18) is slidably disposed through the pressure plate (15). The sliding direction of the splitting rod (18) is the same as the axial direction of the outer cylinder (1). The splitting rod (18) is driven by a driving member (19), which is disposed in the mounting base (12).

2. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: The multiple split tubes (3) are constructed as three groups arranged in an axial array along the outer cylinder (1), each group consisting of multiple tubes arranged in a circumferential array along the outer cylinder (1).

3. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: The inner membrane (2) has guide sealing rings fixed on the inner sides of both ends.

4. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: The inner membrane (2) has support rods fixed to the outer sides of both ends, and the other end of the support rods is supported on the inner wall of the outer cylinder (1).

5. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: The pressure plate (15) is embedded with a seepage chamber (16). The surface of the seepage chamber (16) near the outer cylinder (1) is flush with the surface of the pressure plate (15) near the outer cylinder (1). The surface of the seepage chamber (16) near the outer cylinder (1) is provided with multiple seepage holes. The seepage holes communicate with the interior of the seepage chamber (16). The seepage chamber (16) is also connected to the tank body (17). The tank body (17) is fixed on the mounting base (12).

6. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: The pressure control tube (8) is connected to the first hydraulic controller, and the inlet and outlet pipes (9) are connected to the second hydraulic controller. The number of pressure control tubes (8) is n, where the hydraulic pressure in m pressure control tubes (8) is equal to the hydraulic pressure in the inlet and outlet pipes (9), and the hydraulic pressure in nm pressure control tubes (8) is greater than the hydraulic pressure in the inlet and outlet pipes (9). Here, n and m are both integers greater than 1, and nm is greater than 0.

7. The coal and rock strength parameter splitting test simulation device according to claim 1, characterized in that: Both the outer cylinder (1) and the inner membrane (2) are made of transparent material.

Images