Test fixture for simulating rock burst under supporting action of anchor rod

Abstract

The utility model belongs to the field of anchor rod fixation, and discloses a test fixture for simulating rock burst under the supporting action of an anchor rod, which comprises a storage box, a clamping assembly and a driving assembly, a fixing ring is fixed to the upper end of the storage box, and a clamping assembly is rotationally connected to the inner side of the fixing ring. The clamping assembly comprises a limiting ring, a rotating seat, a connecting block and a hollow rod, the limiting ring is fixed to the outer side of the anchor rod, the connecting block is slidably arranged on the outer side of the limiting ring, one end of the rotating seat is fixedly connected with the connecting block, the other end of the rotating seat is rotatably connected with the hollow rod, and a fixing ring is slidably arranged on the inner side of the hollow rod; the clamping assembly and the driving assembly are arranged, the driving assembly is fixedly connected with the clamping assembly, when the anchor rod inclines, the central axis of the clamping assembly can change along with the anchor rod and still coincide with the anchor rod, then the output direction of the driving assembly coincides with the central axis of the anchor rod, and therefore the friction force between the anchor rod and the clamping assembly is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the field of anchor rod fixing, and particularly relates to a test fixture for simulating rock burst under the action of anchor rod support. BACKGROUND

[0002] The anchor rod enhances the integrity and stability of the rock mass through anchoring, prevents the deformation and collapse of the rock mass, and effectively inhibits the occurrence of rock burst. After the rock burst occurs, it will cause impact and damage to the anchor rod, which may lead to the decrease of the anchoring force of the anchor rod. Therefore, it is necessary to simulate the rock burst around the anchor rod before the production of the anchor rod, and the anchoring force between the anchor rod and the surrounding rock mass is detected.

[0003] However, the test fixture for simulating rock burst under the action of anchor rod support in the application No. CN202321000851.7 realizes the simulation of the single-face empty state of rock by adopting the structure of the combined constraint plate connected with each other, and a reserved hole is formed on the constraint plate to facilitate the insertion and extraction of the anchor rod. However, the central axis of the reserved hole coincides with the central axis of the anchor rod to maintain the stability of the anchor rod. However, when the rock burst occurs, the anchor rod will displace, and the central axis of the reserved hole will not coincide with the central axis of the anchor rod. At this time, when the anchoring property between the anchor rod and the rock mass is tested by pulling out the anchor rod outward, the pulling-out direction is along the central axis of the reserved hole outward, which will affect the accuracy of the test data. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the purpose of the present disclosure is to provide a test fixture for simulating rock burst under the action of anchor rod support, which solves the problem that in the prior art, the central axis of the reserved hole is fixed, and when the anchor rod is inclined, the friction between the anchor rod and the reserved hole will increase during the outward pulling-out process of the anchor rod, thereby affecting the accuracy of the test data.

[0005] The purpose of the present disclosure can be achieved by the following technical solutions:

[0006] A test fixture for simulating rock burst under the action of anchor rod support, comprising a storage box, a clamping assembly and a driving assembly;

[0007] The upper end of the storage box is fixed with a fixed ring, and the inside of the fixed ring is provided with an anchor rod penetrating through, and the inside of the fixed ring is rotationally connected with a clamping assembly;

[0008] The clamping assembly comprises a limiting ring, a rotating seat, a connecting block and a hollow rod. The outside of the anchor rod is fixed with a limiting ring, the outside of the limiting ring is provided with a connecting block slidingly, one end of the rotating seat is fixedly connected with the connecting block, the other end of the rotating seat is rotationally connected with the hollow rod, and the inside of the hollow rod is provided with a fixed ring slidingly.

[0009] The upper end of the limiting ring is fixed with a driving assembly, and the driving assembly comprises a fixing frame, an adjusting ring, a connecting rod and an electric telescopic rod, the upper end of the limiting ring is coaxially fixed with the fixing frame, a through groove penetrating through the fixing frame is formed in the side wall of the fixing frame, the inner side of the through groove is rotationally connected with the adjusting ring, the inner side of the adjusting ring is rotationally connected with the connecting rod, and the upper end of the fixing frame is fixed with the electric telescopic rod, and the upper end of the electric telescopic rod is fixed with a connecting frame.

[0010] In some disclosures, the upper end surface of the storage box is fixed with a support frame, the edge of the support frame is fixed with a reinforcing rib, an arc-shaped groove is formed in the inner wall of the support frame, and the center of the arc-shaped groove coincides with the central axis of the hollow rod.

[0011] In some disclosures, the inner side of the fixing ring is fixed with a cylindrical protrusion, and the end of the hollow rod away from the limiting ring is slidingly arranged with the cylindrical protrusion.

[0012] In some disclosures, the rotating seat is a circular table structure, the smaller diameter end of the rotating seat is inserted with the connecting block, and the larger diameter end of the rotating seat is fixedly connected with the hollow rod, and a plurality of rollers are rotationally arranged on the larger diameter end of the rotating seat.

[0013] In some disclosures, the connecting frame comprises a cross beam and a fixing block, the upper end of the electric telescopic rod is fixed with the fixing block, the inner side of the fixing block is provided with a cross beam penetrating through the fixing block, and the anchor rod is provided with a through hole corresponding to the cross beam.

[0014] In some disclosures, the central axis of the connecting rod and the central axis of the hollow rod are in the same plane.

[0015] In some disclosures, the inner wall of the fixing frame is fixed with a rubber pad.

[0016] The nouns, conjunctions or adjectives involved in the above technical solutions are explained as follows:

[0017] Fixed connection refers to the connection of parts or components after being fixed without any relative movement;

[0018] Rotational connection refers to the connection between parts that allows the parts to rotate relative to each other;

[0019] Screw connection is a kind of detachable fixed connection, which has the advantages of simple structure, reliable connection and convenient assembly and disassembly, and is widely used in mechanical engineering and connection structure field;

[0020] Sliding connection refers to the connection between parts that allows the parts to slide relative to each other.

[0021] The beneficial effects of the present disclosure are:

[0022] By setting the clamping assembly and the driving assembly, the driving assembly is fixedly connected with the clamping assembly, when the anchor rod is inclined, the central axis of the clamping assembly can change with the anchor rod and still coincide with the anchor rod, and then the output direction of the driving assembly coincides with the central axis of the anchor rod, so as to reduce the friction between the anchor rod and the clamping assembly. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present disclosure;

[0025] Figure 2 is a schematic diagram of the connection structure of the clamping assembly and the driving assembly of the embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of the exploded structure of the clamping assembly of the embodiment of the present disclosure;

[0027] Figure 4 is a schematic diagram of the overall structure of the support frame of the embodiment of the present disclosure;

[0028] Figure 5 is a schematic diagram of the overall structure of the limiting ring of the embodiment of the present disclosure.

[0029] In the drawings: 1, storage box; 101, fixed ring; 111, cylindrical protrusion; 2, support frame; 21, reinforcing rib; 201, arc-shaped groove; 3, anchor rod; 31, through hole; 4, clamping assembly; 41, limiting ring; 42, rotating seat; 43, connecting block; 44, hollow rod; 421, roller; 5, driving assembly; 51, fixed frame; 52, adjusting ring; 53, connecting rod; 54, electric telescopic rod; 511, through groove; 512, rubber pad; 6, connecting frame; 61, cross beam rod; 62, fixed block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present disclosure.

[0031] According to the conception of the present application, in combination with Figures 1 to 5To describe an embodiment of a test fixture for simulating rock burst under the action of anchor support. Specifically, the test fixture for simulating rock burst under the action of anchor support is configured as a split structure, which has three components: a receiving box 1, a clamping assembly 4, and a driving assembly 5. By setting the clamping assembly 4 and the driving assembly 5, the driving assembly 5 is fixedly connected with the clamping assembly 4. When the anchor rod 3 is inclined, the central axis of the clamping assembly 4 can change with the anchor rod 3 and still coincide with it, and the output direction of the driving assembly 5 coincides with the central axis of the anchor rod 3, thereby reducing the friction between the anchor rod 3 and the clamping assembly 4.

[0032] Please refer to Figures 1 to 5 A test fixture for simulating rock burst under the action of anchor support, comprising: a receiving box 1, a clamping assembly 4 and a driving assembly 5.

[0033] The upper end of the receiving box 1 is fixed with a fixed ring 101, and the inside of the fixed ring 101 is provided with an anchor rod 3, and the inside of the fixed ring 101 is rotatably connected with the clamping assembly 4.

[0034] The clamping assembly 4 comprises a limiting ring 41, a rotating seat 42, a connecting block 43 and a hollow rod 44, the outside of the anchor rod 3 is fixed with the limiting ring 41, the outside of the limiting ring 41 is slidably provided with the connecting block 43, one end of the rotating seat 42 is fixedly connected with the connecting block 43, and the other end of the rotating seat 42 is rotatably connected with the hollow rod 44, the inside of the hollow rod 44 is slidably provided with the fixed ring 101.

[0035] The upper end of the limiting ring 41 is fixed with the driving assembly 5, and the driving assembly 5 comprises a fixed frame 51, an adjusting ring 52, a connecting rod 53 and an electric telescopic rod 54. The upper end of the limiting ring 41 is coaxially fixed with the fixed frame 51, and the side wall of the fixed frame 51 is provided with a through slot 511 penetrating through the fixed frame 51. The inside of the through slot 511 is rotatably connected with the adjusting ring 52, and the inside of the adjusting ring 52 is rotatably connected with the connecting rod 53. The upper end of the fixed frame 51 is fixed with the electric telescopic rod 54, and the upper end of the electric telescopic rod 54 is fixed with the connecting frame 6.

[0036] In use, the anchor rod 3 is sequentially inserted into the storage box 1 through the upper end of the fixed frame 51, the limiting ring 41 and the fixed ring 101, and then the surrounding rock is filled in the storage box 1, so that the anchor rod 3 is fixed in the storage box 1, if the device capable of explosion is placed in the storage box 1 in advance, the explosion is controlled externally when simulating rock burst, and when the anchor rod 3 is loosened and slightly tilted after the simulation of rock burst in the storage box 1, the limiting ring 41 is fixed on the outer wall of the anchor rod 3, so that when the anchor rod 3 is tilted, the limiting ring 41 is driven to rotate along the hollow rod 44, and if the position of the anchor rod 3 is slightly slid, the limiting ring 41 is driven to slide along the hollow rod 44, at this time, the position of the anchor rod 3 is changed from the original fixed position, and the surrounding rock around the anchor rod 3 is no longer tightly wrapped around the anchor rod 3 after rock burst, so that gaps appear around the anchor rod 3, and then the rock fragments are filled around the anchor rod 3 again under the action of gravity, so as to fix the anchor rod 3 which has been tilted;

[0037] The connecting frame 6 is arranged through the upper end of the anchor rod 3, and then the lower end surface of the connecting frame 6 is fixed on the upper end of the electric telescopic rod 54, at this time, when the fastening degree between the anchor rod 3 and the surrounding rock around the anchor rod 3 is detected after rock burst, the coaxial fixed of the fixed frame 51 and the limiting ring 41 makes the central axis of the fixed frame 51, the central axis of the limiting ring 41 and the central axis of the anchor rod 3 coincide, the electric telescopic rod 54 is fixed on the outer wall of the fixed frame 51, and the outer wall of the electric telescopic rod 54 is parallel to the central axis of the electric fixed frame 51, the fixed frame 51 can increase the contact area between the driving assembly 5 and the anchor rod 3, which is beneficial to increase the connection tightness between the fixed frame 51 and the anchor rod 3, and then the electric telescopic rod 54 is started, the electric telescopic rod 54 drives the connecting frame 6 and the anchor rod 3 to move upward along the central axis of the anchor rod 3, so as to pull out the anchor rod 3, the driving assembly 5 and the clamping assembly 4 are coaxially fixed on the outer wall of the anchor rod 3, so that the driving assembly 5 can change with the change of the angle of the anchor rod 3, when the anchor rod 3 is pulled out, the friction between the inner wall of the storage box 1 and the anchor rod 3 is weakened, because the drill hole at the upper end of the surrounding rock will be deformed after the anchor rod 3 is tilted in actual use, so that the friction between the anchor rod 3 and the drill hole is weak in actual use, so that the anchor rod 3 can be pulled out along the central axis of the anchor rod 3 by the driving assembly 5 and the clamping assembly 4, so as to reduce the friction between the anchor rod 3 and the inner wall of the storage box 1 when the anchor rod 3 is pulled out after being extruded by rock burst, thereby improving the accuracy of simulation.

[0038] Please refer to Figure 1 and Figure 4 The upper end surface of the storage box 1 is fixed with the support frame 2, and the edge of the support frame 2 is fixed with the reinforcing rib 21, the inner wall of the support frame 2 is provided with the arc-shaped groove 201, and the center of the arc-shaped groove 201 coincides with the central axis of the hollow rod 44.

[0039] In use, the support frame 2 is fixed to the upper end face of the storage box 1, and the support frame 2 is coaxially arranged with the fixing ring 101, and then the ends of the two connecting rods 53 of the driving assembly 5 are inserted into the inner side of the support frame 2, so that the support frame 2 further reinforces the fixing frame 51, and the stability of the driving assembly 5 can be improved by fixing the reinforcing ribs 21 on both sides of the support frame 2;

[0040] Please refer to Figure 2 、 Figure 3 and Figure 5 The inner side of the fixing ring 101 is fixed with a cylindrical protrusion 111, and the end of the hollow rod 44 away from the limiting ring 41 is slidably arranged with the cylindrical protrusion 111.

[0041] The rotating seat 42 is a circular table structure, and the smaller diameter end of the rotating seat 42 is inserted with the connecting block 43, and the larger diameter end of the rotating seat 42 is fixedly connected with the hollow rod 44. A plurality of rollers 421 are rotatably arranged on the larger diameter end of the rotating seat 42.

[0042] In use, one end of the hollow rod 44 is inserted into the outer side of the cylindrical protrusion 111, and the other end of the hollow rod 44 is fixed to the inner side of the roller 421, and the rollers 421 are equidistantly arranged around the outer side of the hollow rod 44, and then the rotating seat 42 and the connecting block 43 are fixed to the outer side of the limiting ring 41. Since the central axes of the two cylindrical protrusions 111 coincide, when rock burst occurs, the clamping assembly 4 on the upper end of the anchor rod 3 weakens the restriction of the anchor rod 3 itself, when the upper end of the anchor rod 3 deviates, the clamping assembly 4 can be driven to slide along the cylindrical protrusion 111, thereby compensating for the displacement of the anchor rod 3, which is beneficial to improve the internal force distribution of the clamping assembly 4 and improve the stability of the clamping assembly 4, thereby further improving the stability of the device.

[0043] Please refer to Figure 1 and Figure 2 The connecting frame 6 comprises a cross beam 61 and a fixing block 62, and the upper end of the electric telescopic rod 54 is fixed with the fixing block 62, the inner side of the fixing block 62 is provided with the cross beam 61 penetrating through the fixing block 62, and the anchor rod 3 is provided with a through hole 31 corresponding to the cross beam 61.

[0044] In use, the cross beam rod 61 is fixed at the upper end of the anchor rod 3 through the perforation 31, and then the upper and lower ends of the electric telescopic rod 54 are fixed between the fixed block 62 and the fixed frame 51 respectively, and the cross beam rod 61 is arranged perpendicularly to the electric telescopic rod 54, when the electric telescopic rod 54 is extended upward, the connecting frame 6 is driven to move upward, and then the anchor rod 3 is driven to move upward through the connecting frame 6, when the anchor rod 3 is inclined, the electric telescopic rod 54 is still parallel to the central axis of the anchor rod 3, the positions of the cross beam rod 61 and the electric telescopic rod 54 can change along with the position change of the anchor rod 3, and meanwhile, since the cross beam rod 61 is transversely inserted into the upper end of the anchor rod 3, the cross beam rod 61 is inserted deeply, so that the cross beam rod 61 is not easy to be separated from the perforation 31 when rock burst occurs.

[0045] The central axis of the connecting rod 53 is in the same plane as the central axis of the hollow rod 44; in use, when the anchor rod 3 is inclined, the fixed frame 51 and the limiting ring 41 rotate around the central axis of the hollow rod 44, and meanwhile, the connecting rod 53 slides along the arc-shaped groove 201, so as to cooperate with the position of the anchor rod 3 after being inclined, the supporting property of the driving assembly 5 to the anchor rod 3 is increased through the connecting rod 53, thereby facilitating to improve the stability of the device.

[0046] The inner wall of the fixed frame 51 is fixed with the rubber pad 512; when the anchor rod 3 is subjected to rock burst, the vibration energy of the anchor rod 3 is absorbed through the rubber pad 512, thereby facilitating to reduce the damage of rock burst impact to the driving assembly 5.

[0047] The utility model provides a test fixture for simulating rock burst under the action of anchor rod support, which is characterized by the following technical scheme.

[0048] In use, one end of the hollow rod 44 is inserted into the outside of the cylindrical protrusion 111, and then the hollow rod 44 is fixed with the rotating seat 42 and the connecting block 43 in sequence, and is fixed outside the limiting ring 41 together; then the anchor rod 3 is inserted into the storage box 1 through the limiting ring 41 and the fixed ring 101 from the upper end of the fixed frame 51 in sequence;

[0049] When the position of the anchor rod 3 in the storage box 1 is loosened and is slightly inclined after simulating rock burst, the limiting ring 41 is driven to rotate along the hollow rod 44, and meanwhile, the connecting rod 53 slides along the inner wall of the arc-shaped groove 201 around the central axis of the hollow rod 44, so as to change the direction of the driving assembly 5 to be parallel to the central axis of the inclined anchor rod 3, at this time, the electric telescopic rod 54 is started, the electric telescopic rod 54 drives the connecting frame 6 and the anchor rod 3 to move upward along the central axis of the anchor rod 3, so as to pull out the anchor rod 3.

[0050] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like 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 the present disclosure. In the specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0051] The basic principles, main features and advantages of the present disclosure are shown and described above. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, various changes and improvements can be made to the present disclosure, and these changes and improvements all fall within the scope of the claimed present disclosure.

Claims

1. A test jig for simulating rockburst under the action of bolting, characterized by, Include: Accommodation box (1), clamping assembly (4) and drive assembly (5); The upper end of the accommodation box (1) is fixed with a fixed ring (101), and the inner side of the fixed ring (101) is provided with an anchor rod (3), and the inner side of the fixed ring (101) is rotatably connected with the clamping assembly (4); The clamping assembly (4) includes a limiting ring (41), a rotating seat (42), a connecting block (43) and a hollow rod (44), the outer side of the anchor rod (3) is fixed with a limiting ring (41), the outer side of the limiting ring (41) is slidably provided with a connecting block (43), one end of the rotating seat (42) is fixedly connected with the connecting block (43), and the other end of the rotating seat (42) is rotatably connected with the hollow rod (44), the inner side of the hollow rod (44) is slidably provided with the fixed ring (101); The upper end of the limiting ring (41) is fixed with a drive assembly (5), and the drive assembly (5) includes a fixed frame (51), an adjusting ring (52), a connecting rod (53) and an electric telescopic rod (54), the upper end of the limiting ring (41) is coaxially fixed with a fixed frame (51), the side wall of the fixed frame (51) is provided with a through slot (511) penetrating through the fixed frame (51), the inner side of the through slot (511) is rotatably connected with an adjusting ring (52), the inner side of the adjusting ring (52) is rotatably connected with a connecting rod (53), the upper end of the fixed frame (51) is fixed with an electric telescopic rod (54), and the upper end of the electric telescopic rod (54) is fixed with a connecting frame (6).

2. The test fixture for simulating rockburst under the action of anchor support according to claim 1, characterized in that, The upper end surface of the accommodation box (1) is fixed with a support frame (2), and the edge of the support frame (2) is fixed with a reinforcing rib (21), the inner wall of the support frame (2) is provided with an arc-shaped groove (201), and the center of the arc-shaped groove (201) coincides with the central axis of the hollow rod (44).

3. The test fixture for simulating rockburst under the action of anchor support according to claim 2, characterized in that, The inner side of the fixed ring (101) is fixed with a cylindrical protrusion (111), and the end of the hollow rod (44) away from the limiting ring (41) is slidably provided with the cylindrical protrusion (111).

4. The test fixture for simulating rockburst under the action of anchor support according to claim 3, characterized in that, The rotating seat (42) is a circular table structure, and the smaller diameter end of the rotating seat (42) is inserted with the connecting block (43), and the larger diameter end of the rotating seat (42) is fixedly connected with the hollow rod (44), and a plurality of rollers (421) are rotatably arranged on the larger diameter end of the rotating seat (42).

5. The test fixture for simulating rockburst under the action of anchor support according to claim 1, characterized in that, The connecting frame (6) includes a cross beam (61) and a fixed block (62), the upper end of the electric telescopic rod (54) is fixed with a fixed block (62), the inner side of the fixed block (62) is provided with a cross beam (61) penetrating through the fixed block (62), and the anchor rod (3) is provided with a through hole (31) corresponding to the cross beam (61).

6. The test fixture for simulating rockburst under the action of bolting according to claim 4, characterized in that, The central axis of the connecting rod (53) is in the same plane as the central axis of the hollow rod (44).

7. The test fixture for simulating rockburst under the action of anchor support according to claim 1, characterized in that, The inner wall of the fixed frame (51) is fixed with a rubber pad (512).

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