CN220854098U - Supporting system testing device - Google Patents

Abstract

The utility model provides a support system testing device, comprising: a frame body; an impact part including a drop hammer liftably provided in the frame body; the supporting part comprises a supporting frame, a rock body, a composite net and a supporting component, wherein the composite net is arranged in the supporting frame through the supporting component and comprises a rubber cushion layer and a metal cushion layer, the rock body is paved between the top wall of the supporting frame and the rubber cushion layer and coats the supporting component, the rock body comprises a main body and an impact cushion block, and the impact cushion block protrudes out of the top wall of the supporting frame and is opposite to the drop hammer; the test part comprises a plurality of stress detection blocks, wherein the stress detection blocks are distributed between the rubber cushion layer and the rock mass and between the rubber cushion layer and the metal cushion layer so as to detect the stress condition between the rubber cushion layer and the rock mass and the stress condition between the rubber cushion layer and the metal cushion layer when the falling hammer impacts the rock mass. By the technical scheme provided by the utility model, the reliability and the comprehensiveness of the test of the supporting system testing device can be improved.

Description

Supporting system testing device

Technical Field

The utility model relates to the technical field of support testing, in particular to a support system testing device.

Background

Along with the continuous utilization of coal resources, the depth of coal exploitation is gradually increased, and disasters such as rock burst and rock burst frequently occur. The stress of the anchoring support system under the action of dynamic load is far higher than that of the conventional working condition (namely, the stress of the anchoring support system under the action of static load), and the mechanical property of the anchoring support system under the action of dynamic load is considered while the conventional static load mechanical property test is carried out on the anchoring support system.

Aiming at the situation, the prior art provides a test structure and a test method for a support system under the action of dynamic and static force, such as a CN 202210501178-engineering rock mass dynamic and static mechanical property test system and a test method, which can realize the test of the support effect of the support structure under dynamic load and static load. However, the test structure cannot realize the detection of buffering or supporting effects similar to structures such as supporting pads, buffering nets and the like, the test result of the supporting effect of the supporting system on the rock mass is easy to cause, and the situation that the supporting system actually has access or even larger access to the supporting effect of the rock mass cannot be ensured, so that the comprehensiveness and reliability of the test result cannot be ensured.

Disclosure of utility model

The utility model provides a supporting system testing device, which is used for improving the reliability and the comprehensiveness of the testing of the supporting system testing device.

In order to solve the above problems, the present utility model provides a support system testing apparatus, comprising: a frame body; an impact part including a drop hammer liftably provided in the frame body; the supporting part is arranged at the bottom of the frame main body, the supporting part comprises a supporting frame, a rock mass, a composite net and a supporting component, the composite net is arranged in the supporting frame through the supporting component, the composite net comprises a rubber cushion layer and a metal cushion layer, the rubber cushion layer is positioned above the metal cushion layer, the rock mass is paved between the top wall of the supporting frame and the rubber cushion layer and coats the supporting component, the rock mass comprises a main body and an impact cushion block, the main body is paved in the supporting frame, and the impact cushion block protrudes out of the top wall of the supporting frame and is arranged opposite to the drop hammer; the testing part comprises a plurality of stress detection blocks, wherein the stress detection blocks are distributed between the rubber cushion layer and the rock mass and between the rubber cushion layer and the metal cushion layer so as to detect the stress condition between the rubber cushion layer and the rock mass and the stress condition between the rubber cushion layer and the metal cushion layer when the falling hammer impacts the rock mass.

Further, the supporting component comprises at least two groups of anchoring components and a pre-tightening component, the anchoring components comprise anchor ropes or anchor rods, two ends of the anchor ropes or the anchor rods respectively penetrate through the supporting frame and the metal cushion layer, the pre-tightening component is arranged at two ends of the anchor ropes or the anchor rods, which protrude out of the supporting frame and the metal cushion layer correspondingly, so as to provide pre-tightening force for installation of the rock mass and the supporting frame, and the testing part further comprises a dynamometer arranged between the pre-tightening component and the metal cushion layer, wherein the dynamometer is used for detecting the pre-tightening force value provided by the pre-tightening component.

Further, the pre-tightening assembly comprises two pre-tightening nuts, the two pre-tightening nuts are respectively sleeved at the end parts of the convex supporting frame and the metal cushion layer of the anchoring assembly and are in threaded fit with the anchoring assembly, and the pre-tightening nuts are rotatably arranged to clamp the supporting frame, the rock mass and the composite net and adjust the pre-tightening force.

Further, the pretension subassembly includes pretension nut and support piece, pretension nut, support piece cover are established respectively at the both ends of corresponding anchor subassembly protrusion support frame top, bottom, support piece includes spacing buffer structure and the backing plate that connects in order, the aligning pad, shock-resistant anchor ring and anchor ring lid, the backing plate is used for supporting the compound net and sets up with the aligning pad is rotatable relatively, shock-resistant anchor ring and aligning pad threaded connection, anchor ring lid and anchor subassembly threaded connection and with shock-resistant anchor ring spacing cooperation, spacing buffer structure sets up between anchor ring lid and shock-resistant anchor ring, in order to provide shock-resistant buffering for rock mass and/or anchor subassembly.

Further, the anchor ring cover is of a cover body structure with a concave section, the limiting buffer structure comprises a circular table column with one end penetrating into the cavity of the anchor ring cover, the outer diameter of the circular table column is gradually reduced in the direction of the anchor ring cover towards the impact-resistant anchor ring, the anchor assembly penetrates through the circular table column and is in limiting fit with the inner wall of a through hole of the circular table column, the shape of the through hole of the impact-resistant anchor ring is matched with that of the circular table column, the radial size of the through hole of the impact-resistant anchor ring is smaller than that of the circular table column, under the condition that the anchor ring cover is screwed up with the anchor assembly, a buffer interval is formed between the bottom wall of the impact-resistant anchor ring and the bottom wall of the cavity of the anchor ring cover under the stop of the circular table column, the circular table column can be stressed and deformed in a compression mode, so that the whole structure above the anchor ring cover can move downwards along the extending direction of the anchor assembly, and the buffer interval is used for providing avoidance space for the downward movement of the whole structure above the anchor ring cover.

Further, the impact part also comprises a guide seat, a guide rail is arranged in the frame main body, the guide seat is slidably arranged along the guide rail and is in limit fit with the guide rail, the drop hammer is arranged on the guide seat, and one end of the drop hammer protrudes out of the bottom wall of the guide seat.

Further, the impact part also comprises a clamping assembly and a resetting assembly, wherein the clamping assembly is arranged at the top of the frame main body, the clamping assembly is used for clamping the guide seat, the clamping position is positioned in the top area of the frame main body, and the resetting assembly is used for resetting the guide seat and the drop hammer which are abutted with the supporting assembly to the clamping position of the clamping assembly; under the condition that the clamping assembly loosens the guide seat, the guide seat and the drop hammer freely fall down and impact the impact cushion block.

Further, the impact part further comprises a plurality of weight pieces, and the weight pieces are detachably arranged in the guide seat so as to adjust the falling speed of the drop hammer and the impact force on the rock mass.

Further, the metal cushion layer is woven by a plurality of W corrugated reinforcing steel bars which are horizontally arranged to form a grid reinforcing steel bar net, the connecting positions of any two W corrugated reinforcing steel bars net are welded, and the rubber cushion layer is formed by alternately stacking a plurality of rubber layers and a plurality of steel wire plate layers.

Further, the support frame includes a plurality of stand columns and a plurality of cross beams, and a plurality of stand columns are distributed in the bottom of the frame body along the circumference of the frame body, and the cross beam is disposed on a plurality of stand columns, and the area surrounded by the bottom of the cross beam, the plurality of stand columns and the frame body is used for installing the support portion.

By applying the technical scheme of the utility model, the utility model provides a supporting system testing device, which comprises: a frame body; an impact part including a drop hammer liftably provided in the frame body; the supporting part is arranged at the bottom of the frame main body, the supporting part comprises a supporting frame, a rock mass, a composite net and a supporting component, the composite net is arranged in the supporting frame through the supporting component, the composite net comprises a rubber cushion layer and a metal cushion layer, the rubber cushion layer is positioned above the metal cushion layer, the rock mass is paved between the top wall of the supporting frame and the rubber cushion layer and coats the supporting component, the rock mass comprises a main body and an impact cushion block, the main body is paved in the supporting frame, and the impact cushion block protrudes out of the top wall of the supporting frame and is arranged opposite to the drop hammer; the testing part comprises a plurality of stress detection blocks, wherein the stress detection blocks are distributed between the rubber cushion layer and the rock mass and between the rubber cushion layer and the metal cushion layer so as to detect the stress condition between the rubber cushion layer and the rock mass and the stress condition between the rubber cushion layer and the metal cushion layer when the falling hammer impacts the rock mass.

By adopting the scheme, on the basis of guaranteeing the supporting effect test of the supporting system testing device on the rock mass under the static environment, the impact on the rock mass is realized through the drop hammer so as to simulate the dynamic loading environment where the rock mass is positioned and the dynamic loading stress borne by the rock mass, and the supporting effect test of the supporting assembly on the rock mass under different dynamic loading environments is realized through the impact of different effects of the drop hammer. The rock mass in the scheme comprises the impact cushion block opposite to the drop hammer, so that the transmission and distribution of impact force on the rock mass main body are facilitated, and meanwhile, the dynamic load environment in which the non-dynamic load force directly acts on the rock mass main body is also facilitated to be simulated. Further, the rock mass under the dynamic load environment is buffered through the rubber cushion layer, the auxiliary support of the rock mass under the dynamic load environment is further realized through the metal cushion layer, and the simulation of the reliable support of the rock mass is facilitated. On the other hand, the stress condition between the rubber cushion layer and the rock mass and the stress condition between the rubber cushion layer and the metal cushion layer are detected through the stress detection blocks of the test part, the supporting effect of the supporting component on the rock mass in the dynamic loading environment, the buffering effect of the rubber cushion layer on the rock mass in the dynamic loading environment and the numeric value of the auxiliary supporting effect of the metal cushion layer on the rock mass in the dynamic loading environment are realized, the analysis and calculation of the supporting effect specific gravity of the supporting component and the composite net on the rock mass are facilitated, the supporting effect of the composite net on the rock mass in the dynamic loading environment is avoided, the situation that the supporting test result of the supporting component on the rock mass and the actual supporting effect have larger access is easily caused, and the reliability and the comprehensiveness of the supporting system test device on the supporting effect detection are ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a schematic structural diagram of a support system testing device according to an embodiment of the present utility model;

FIG. 2 shows a schematic view of the assembly of the support and load cell of the support system testing apparatus of FIG. 1;

Fig. 3 is a schematic structural view of a support member of a support system testing apparatus according to another embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. A frame body; 11. a guide rail;

21. Drop hammer; 22. a guide seat; 23. a clamping assembly; 24. a reset assembly; 25. a weight member;

30. A support part; 31. a support frame; 311. a cross beam; 312. a column; 32. a rock mass; 321. a main body; 322. impact cushion blocks; 33. a composite web; 34. a support assembly; 341. an anchor assembly; 342. pre-tightening the nut; 343. a support member; 3431. a backing plate; 3432. a centering pad; 3433. an impact resistant anchor ring; 3434. an anchor ring cover; 3435. a limit buffer structure; 344. a buffer interval;

41. a load cell.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a support system testing apparatus, including: a frame body 10; an impact section including a drop hammer 21 provided in the frame body 10 so as to be liftable; the supporting part 30 is arranged at the bottom of the frame body 10, the supporting part 30 comprises a supporting frame 31, a rock mass 32, a composite net 33 and a supporting component 34, the composite net 33 is arranged in the supporting frame 31 through the supporting component 34, the composite net 33 comprises a rubber cushion layer and a metal cushion layer, the rubber cushion layer is positioned above the metal cushion layer, the rock mass 32 is paved between the top wall of the supporting frame 31 and the rubber cushion layer and covers the supporting component 34, the rock mass 32 comprises a main body 321 and an impact cushion block 322, the main body 321 is paved in the supporting frame 31, and the impact cushion block 322 protrudes out of the top wall of the supporting frame 31 and is arranged opposite to the drop hammer 21; the test part comprises a plurality of stress detection blocks, wherein the stress detection blocks are distributed between the rubber cushion layer and the rock body 32 and between the rubber cushion layer and the metal cushion layer so as to detect the stress condition between the rubber cushion layer and the rock body 32 and the stress condition between the rubber cushion layer and the metal cushion layer when the drop hammer 21 impacts the rock body 32.

In this embodiment, on the basis of ensuring the test of the supporting effect of the supporting system testing device on the rock mass 32 in the static environment, the impact on the rock mass 32 is realized through the drop hammer 21 so as to simulate the dynamic loading environment where the rock mass 32 is located and the dynamic loading stress, and the test of the supporting effect of the supporting assembly on the rock mass 32 in different dynamic loading environments is realized through the impact of multiple different effects of the drop hammer 21. The rock mass 32 in this embodiment includes the impact pad 322 opposite to the drop hammer 21, which is beneficial to realizing the transmission and distribution of impact force on the main body of the rock mass 32, and is beneficial to simulating the dynamic load environment in which the passive load force directly acts on the main body of the rock mass 32. Further, the buffer of the rock mass 32 in the dynamic load environment is realized through the rubber cushion layer, the auxiliary support of the rock mass 32 in the dynamic load environment is further realized through the metal cushion layer, and the simulation of the reliable support of the rock mass 32 is facilitated. On the other hand, the stress condition between the rubber cushion layer and the rock mass 32 and the stress condition between the rubber cushion layer and the metal cushion layer are detected through the stress detection blocks of the test part, the supporting effect of the supporting component on the rock mass 32 in the dynamic load environment, the buffering effect of the rubber cushion layer on the rock mass 32 in the dynamic load environment and the auxiliary supporting effect of the metal cushion layer on the rock mass 32 in the dynamic load environment are digitalized, the analysis and calculation of the supporting effect specific gravity of the supporting component and the composite net 33 on the rock mass 32 are facilitated, the situation that the supporting test result of the supporting component on the rock mass 32 and the actual supporting effect have larger access in the prior art is avoided, and the reliability and the comprehensiveness of the supporting system test device on the supporting effect detection are ensured.

Specifically, the test section further includes an impact force value sensor and a displacement sensor provided on the impact section and/or the support section 30 for detecting the impact force and displacement amount provided by the drop hammer 21. So set up, the test personnel of being convenient for test is to the supporting subassembly 34 and the record of the supporting effect of composite network 33 to the rock mass 32 under the static environment, or to the supporting effect of rock mass 32 under the different dynamic load environment.

Preferably, the impact pad 322 in the present embodiment has a rectangular block or cylindrical block structure, which is mainly used to make the force distribution of the drop hammer 21 acting on the main body 321 more uniform, so as to better simulate the actual rock mass 32 environment, and avoid the situation that the drop hammer 21 may damage the supporting frame 31 during the impact process. In order to better achieve the above purpose, the impact pad 322 may be designed to have a block structure and a plate structure, where the block structure is still a rectangular block or a cylindrical block protruding out of the top of the supporting frame 31, the plate structure is disposed in the supporting frame 31 and is in stop fit with the top wall of the cavity of the supporting frame 31, the circumference of the plate structure is in stop fit with the inner wall of the cavity of the supporting frame 31, and the shape of the plate structure is adapted to the shape of the inner wall of the cavity of the supporting frame 31 or the shape of the rock mass 32, so that when the drop hammer 21 impacts the rock mass 32, the impact force can be better and evenly distributed on the main body 321 through the block structure and the plate structure, so that the situation that the impact force is too large and is difficult to be dispersed or the dispersion effect of the impact force cannot reach the expected condition when the impact force is too concentrated is avoided, and the simulation of the actual environment where the rock mass 32 is located is more facilitated.

As shown in fig. 2, the supporting component 34 includes at least two groups of anchoring components 341 and a pretensioning component, the anchoring components 341 include anchor cables or anchor rods, two ends of the anchor cables or anchor rods respectively penetrate through the supporting frame 31 and the metal cushion layer, the pretensioning component is arranged at two ends of the anchor cables or anchor rods protruding out of the supporting frame 31 and the metal cushion layer correspondingly so as to provide pretensioning force for installation of the rock mass 32 and the supporting frame 31, the testing part further includes a dynamometer 41 arranged between the pretensioning component and the metal cushion layer, and the dynamometer 41 is used for detecting the value of the pretensioning force provided by the pretensioning component.

In this embodiment, the pre-tightening assemblies are disposed at two ends of the corresponding anchoring assemblies 341, after the laying of the rock mass 32 is completed, the tester realizes the compression of the supporting frame 31, the rock mass 32 and the composite net 33 by adjusting the pre-tightening assemblies, adjusts the pre-tightening force applied to the rock mass 32 according to the actual testing condition, and displays and records the current pre-tightening force value through the dynamometer 41. The arrangement is beneficial to realizing the fastening of the rock mass 32, simultaneously is beneficial to simulating the supporting effect of the supporting component 34 and the composite net 33 on the rock mass 32 under different pretightening force states, and ensures the reliability and comprehensiveness of the supporting effect test by the supporting system testing device.

Specifically, the pre-tightening assembly includes two pre-tightening nuts 342, the two pre-tightening nuts 342 are respectively sleeved at the ends of the anchoring assembly 341 protruding out of the supporting frame 31 and the metal cushion layer and are in threaded fit with the anchoring assembly 341, and the pre-tightening nuts 342 are rotatably arranged to clamp the supporting frame 31, the rock mass 32 and the composite net 33 and adjust the pre-tightening force. The arrangement is convenient for setting and adjusting the pre-tightening assembly. The pretensioning effect of the pretensioning nut 342 located above in this embodiment acts on the supporting frame 31, which cannot adjust the pretensioning force of the rock mass 32, and a tester can adjust the pretensioning force of the rock mass 32 simply by adjusting the tightness of the pretensioning nut 342 below, so that the adjustment is convenient and reliable.

As shown in fig. 1, the impact portion further includes a guide seat 22, the frame body 10 has a guide rail 11 therein, the guide seat 22 is slidably disposed along the guide rail 11 and is in limit fit with the guide rail 11, the drop hammer 21 is disposed on the guide seat 22, and one end of the drop hammer protrudes out of the bottom wall of the guide seat 22. The setting like this guarantees the track that drop weight 21 falls, avoids drop weight 21 to appear the skew at the whereabouts in-process, to rock mass 32 impact position deviation or direct impact on supporting frame 31, leads to the condition of test failure or device damage, guarantees the reliability that drop weight 21 falls and its reliability to rock mass 32 impact.

As shown in fig. 1, the impact part further comprises a clamping assembly 23 and a resetting assembly 24, wherein the clamping assembly 23 is arranged at the top of the frame body 10, the clamping assembly 23 is used for clamping the guide seat 22, the clamping position is positioned at the top area of the frame body 10, and the resetting assembly 24 is used for resetting the guide seat 22 and the drop hammer 21 which are abutted with the supporting assembly 34 to the clamping position of the clamping assembly 23; wherein, in case the clamping assembly 23 releases the guide holder 22, the guide holder 22 and the drop hammer 21 freely fall and impact the impact pad 322.

In this embodiment, the clamping assembly 23 includes an openable clamping jaw to clamp or release the guide holder 22, and the resetting assembly 24 includes a reelable stranded wire assembly to move the guide holder 22 along the height direction of the frame body 10. Specifically, when a test is required, a tester integrally lifts the guide holder 22 and the drop hammer 21 to the clamping position of the clamping assembly 23 through the reset assembly 24 and clamps the guide holder and the drop hammer 21 through the clamping jaws, and after the adjustment of the impact force or displacement and other data of the drop hammer 21 is finished, the clamping jaws are released to enable the guide holder 22 and the drop hammer 21 to freely fall down to impact the impact cushion block 322, the test data is recorded through the test part, and one test is finished.

Preferably, the gripping position of the gripping jaws in the present embodiment is suitably adjustable in the top region of the frame body 10 to enhance the adjusting effect on the impact effect when the drop hammer 21 falls. For example, the gripping position may be adjusted up or down as appropriate to make a small adjustment of the height at which the drop hammer 21 falls.

Specifically, the impact portion further includes a plurality of weight pieces 25, and the plurality of weight pieces 25 are detachably provided in the guide holder 22 to adjust the falling speed of the drop weight 21 and the impact force to the rock mass 32. The setting like this can realize the regulation of drop weight 21 to rock mass 32 impact effect according to the weight piece 25 quantity that sets up, has improved the convenience of test and the convenience of operating personnel operation.

In this embodiment, the metal cushion layer is woven by a plurality of horizontally arranged W-shaped corrugated reinforcing steel bars to form a grid-shaped reinforcing steel bar net, the connection positions of any two W-shaped corrugated reinforcing steel bars are welded, and the rubber cushion layer is formed by alternately stacking a plurality of rubber layers and a plurality of steel wire plate layers. The setting has improved the overall structure intensity of metal bed course, rubber bed course and two respectively to the auxiliary stay and the cushioning effect of rock mass 32 like this, and the welding of the hookup location of arbitrary two ripple form reinforcing bar net has further increaseed the structural strength of metal bed course. Specifically, the metal cushion layer in this embodiment is woven by a plurality of horizontally arranged W corrugated reinforcing steel bar meshes to form a grid-shaped reinforcing steel bar mesh, which is favorable for improving the impact resistance of the metal cushion layer, and the rubber cushion layer adopts a steel wire plate layer, which is favorable for improving the yielding ability of the rubber cushion layer and the buffering effect.

As shown in fig. 2, the support frame 31 includes a cross member 311 and a plurality of stand columns 312, the plurality of stand columns 312 being distributed at the bottom of the frame body 10 in the circumferential direction of the frame body 10, the cross member 311 being disposed on the plurality of stand columns 312, and a region surrounded by the cross member 311, the plurality of stand columns 312, and the bottom of the frame body 10 for mounting the support portion 30. This arrangement facilitates the support of the support assembly 34 and the composite net 33 and the laying of the rock mass 32.

As shown in fig. 3, another embodiment of the present utility model provides a supporting system testing device, which is different from the above embodiment in that the pre-tightening assembly in this embodiment includes a pre-tightening nut 342 and a supporting member 343, the pre-tightening nut 342 and the supporting member 343 are respectively sleeved at two ends of the corresponding anchoring assembly 341 protruding from the top and bottom of the supporting frame 31, the supporting member 343 includes a limiting buffer structure 3435 and a backing plate 3431, a aligning pad 3432, an impact-resistant anchor ring 3433 and an anchor ring cover 3434 sequentially connected, the backing plate 3431 is used for supporting the composite net 33 and is rotatably arranged relative to the aligning pad 3432, the impact-resistant anchor ring 3433 is in threaded connection with the aligning pad 3432, the impact-resistant anchor ring cover 3434 is in threaded connection with the anchoring assembly 341 and is in limit fit with the anchor ring 3433, and the limiting buffer structure 3435 is arranged between the anchor ring cover 3434 and the impact-resistant anchor ring 3433 to provide impact-resistant buffering for the rock mass 32 and/or the anchoring assembly 341.

In this embodiment, the tester achieves compaction of the rock mass 32 and adjustment of the pretension of the rock mass 32 by adjusting the tightness of the anchor ring cover 3434. The limiting buffer structure 3435 can provide buffer for the stress of the rock mass 32 when the impact force of the rock mass 32 is overlarge, so that the anchoring assembly is prevented from breaking due to the overlarge impact force of the rock mass 32 (when the impact load exceeds 70% of the breaking load of the anchoring assembly 341), the supporting failure of the rock mass 32 and the dynamic load test failure of the rock mass 32 are further caused, and the reliability of the supporting assembly 34 is ensured. Preferably, the testing portion may include a sensor for testing the magnitude of the impact force buffered by the limit buffer structure 3435, so as to facilitate the recording of the test personnel and improve the accuracy and comprehensiveness of the testing of the support system testing device.

Specifically, the anchor ring cover 3434 is a cover body structure with a concave section, the limiting buffer structure 3435 includes a circular column with one end penetrating in the cavity of the anchor ring cover 3434, the outer diameter of the circular column gradually decreases in the direction of the anchor ring cover 3434 towards the impact-resistant anchor ring 3433, the anchor assembly 341 penetrates through the circular column and is in limiting fit with the inner wall of the through hole of the circular column, the shape of the through hole of the impact-resistant anchor ring 3433 is matched with that of the circular column, the radial dimension of the through hole of the impact-resistant anchor ring 3433 is smaller than that of the circular column, under the condition that the anchor ring cover 3434 is screwed with the anchor assembly 341, a buffer interval 344 is formed between the bottom wall of the impact-resistant anchor ring 3433 and the bottom wall of the cavity of the anchor ring cover 3434 under the stop of the circular column, and the circular column can be subjected to compression deformation, so that the whole structure above the anchor ring cover 3434 can move downwards along the extending direction of the anchor assembly 341, and the buffer interval 344 is used for providing avoidance space for the downward movement of the whole structure above the anchor ring cover 3434. In this way, if the impact force applied to the rock mass 32 is too large, the rock mass 32 will press down the composite net 33 and other structures except the anchor ring cover 3434 and the limiting buffer structure 3435 in the supporting member 343 and have a downward movement trend, at this time, the cylindrical table will be compressively deformed under the impact force, so that the peripheral dimension thereof is extruded to be smaller, and the cylindrical table can further extend into the through hole of the impact-resistant anchor ring 3433, and the upper integral structure compresses the cylindrical table under the impact force to deform and simultaneously move downward, so as to buffer the impact applied to the rock mass 32. The buffer space 344 is mainly used for enabling the upper integral structure to move downwards, avoiding the situation that the upper integral structure cannot move downwards due to the abutting of the bottom wall of the shock-resistant anchor ring 3433 and the bottom wall of the cavity of the anchor ring cover 3434, and guaranteeing the reliability of the limiting buffer structure 3435.

In summary, the utility model provides a supporting system testing device, which has the following setting parameters and working principles:

(1) A supporting frame 31 is arranged in the frame main body 10, the supporting frame 31 comprises four upright posts 312, the space between any two upright posts 312 is 1.5m, a cross beam 311 is paved above the supporting frame, and the cross beam 311 is used for fixing an anchoring assembly 341; when the supporting frame 31 is installed, 4 anchor assemblies 341 are firstly installed on the cross beam 311, threads are machined at two ends of the cross beam, pre-tightening nuts 342 are respectively installed on the upper side and the lower side of the anchor assemblies 341, and a dynamometer 41 and a compound net 33 are sequentially arranged below the lower pre-tightening nuts 342;

(2) A body 321 of the rock mass 32 is laid over the composite net 33, the body 321 of the rock mass 32 being replaced by a concrete slab. The metal cushion layer is woven by adopting a woven steel bar net, the diameter of the steel wire is 8mm, the steel wire is in a W corrugated shape, the horizontal steel wire and the vertical steel wire are woven, and the contact positions are welded. The rubber cushion layer is composed of a steel wire laminate and a rubber layer, the elastic modulus is 6000kPa, the damping ratio is 0.3, the arrangement mode is that one layer of rubber and one layer of steel plate are stacked and formed, the whole thickness of the rubber cushion layer is 3mm, the thickness of the steel plate is 1mm, the total thickness is 39mm, and the rubber cushion layer is placed between the main body 321 of the rock body 32 and the metal cushion layer. Stress detection blocks are arranged between the rubber cushion layer and the main body 321 of the rock body 32 and between the metal cushion layer and the rubber cushion layer, so that the attenuation effect and the energy absorption effect of the rubber cushion layer on impact stress and the auxiliary supporting effect of the metal cushion layer can be determined;

(3) The main body 321 of the rock mass 32 is stopped when it is laid to the bottom wall of the cross beam 311, and an impact pad 322 is placed above the main body 321 for impact by the drop hammer 21. The anchor assembly 341 is fixed on the beam 311, and is pre-tightened by a pre-tightening nut 342, wherein the pre-tightening nut 342 can be designed with different torques according to different testing schemes, such as 100Nm/200Nm/300Nm/400Nm, etc.;

(4) Before the test, the wires of various sensors (an impact force value sensor, a displacement sensor and the like in the embodiment) are connected into the acquisition system, and the test is carried out to check whether the various sensors are normal. Meanwhile, a high-speed camera is turned on, and a reasonable shooting frequency is set;

(5) Determining impact energy, calculating the weight and the height of the drop hammer 21 through the impact energy, lifting the drop hammer 21 corresponding to the loading mass to the corresponding height through the reset assembly 24 and clamping through the clamping assembly 23, then loosening the clamping jaw, enabling the drop hammer 21 to freely fall down to the impact cushion block 322, transmitting the impact force to the main body 321 of the rock mass 32 through the impact cushion block 322, transmitting the impact force to the composite net 33 through the main body 321, and acquiring the impact force and displacement data of the drop hammer 21 in real time through a dynamic oscilloscope;

(6) Automatically calculating data such as an impact force time course curve, a displacement time course curve, an anchor rod strain time course curve, an anchor rod stress time course curve and the like of the support system through analysis software, and obtaining the impact resistance of the support system through analysis of the data;

(7) After the anchoring component 341 is broken in the impact process of the support system, the fracture, metallographic structure and chemical elements of the anchoring component 341 are tested, the broken form of the anchoring component 341 under the impact load is analyzed, and the influence of the metallographic structure and the chemical elements of the anchoring component 341 on the impact resistance of the anchoring component 341 to the rock mass 32 can be studied.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A support system testing device, comprising:

A frame body (10);

An impact part including a drop hammer (21) provided in the frame body (10) so as to be movable up and down;

The supporting part (30) is arranged at the bottom of the frame main body (10), the supporting part (30) comprises a supporting frame (31), a rock mass (32), a composite net (33) and a supporting component (34), the composite net (33) is arranged in the supporting frame (31) through the supporting component (34), the composite net (33) comprises a rubber cushion layer and a metal cushion layer, the rubber cushion layer is arranged above the metal cushion layer, the rock mass (32) is paved between the top wall of the supporting frame (31) and the rubber cushion layer and coats the supporting component (34), the rock mass (32) comprises a main body (321) and an impact cushion block (322), the main body (321) is paved in the supporting frame (31), and the impact cushion block (322) protrudes out of the top wall of the supporting frame (31) and is arranged right against the drop hammer (21);

the test part comprises a plurality of stress detection blocks, wherein the stress detection blocks are distributed between the rubber cushion layer and the rock mass (32) and between the rubber cushion layer and the metal cushion layer so as to detect stress conditions between the rubber cushion layer and the rock mass (32) and stress conditions between the rubber cushion layer and the metal cushion layer when the drop hammer (21) impacts the rock mass (32).

2. The support system testing device according to claim 1, wherein the support assembly (34) comprises at least two groups of anchoring assemblies (341) and pre-tightening assemblies, the anchoring assemblies (341) comprise anchor cables or anchor rods, two ends of the anchor cables or the anchor rods respectively penetrate through the support frame (31) and the metal cushion layer, the pre-tightening assemblies are arranged at two ends of the anchor cables or the anchor rods protruding out of the support frame (31) and the metal cushion layer respectively so as to provide pre-tightening force for installation of the rock mass (32) and the support frame (31), and the testing part further comprises a dynamometer (41) arranged between the pre-tightening assemblies and the metal cushion layer, wherein the dynamometer (41) is used for detecting pre-tightening force values provided by the pre-tightening assemblies.

3. The support system testing device according to claim 2, wherein the pre-tightening assembly comprises two pre-tightening nuts (342), the two pre-tightening nuts (342) are respectively sleeved at the end parts of the anchoring assembly (341) protruding out of the support frame (31) and the metal cushion layer and are in threaded fit with the anchoring assembly (341), and the pre-tightening nuts (342) are rotatably arranged to clamp the support frame (31), the rock mass (32) and the composite net (33) and adjust the pre-tightening force.

4. The support system testing device according to claim 2, wherein the pre-tightening assembly comprises a pre-tightening nut (342) and a support member (343), the pre-tightening nut (342) and the support member (343) are respectively sleeved at two ends corresponding to the top and the bottom of the support frame (31) protruding out of the anchor assembly (341), the support member (343) comprises a limit buffer structure (3435) and a backing plate (3431), a centering pad (3432), an impact anchor ring (3433) and an anchor ring cover (3434) which are sequentially connected, the backing plate (3431) is used for supporting the composite net (33) and is rotatably arranged relative to the centering pad (3432), the anchor ring (3433) and the centering pad (3432) are in threaded connection, the anchor ring cover (3434) is in threaded connection with the anchor assembly (341) and is in limit fit with the impact anchor ring (3433), and the limit buffer structure (3435) is arranged between the anchor ring (3433) and the anchor ring (341) or the anchor ring (33) is provided with the impact buffer assembly (341) or the anchor ring (32).

5. The support system testing device according to claim 4, wherein the anchor ring cover (3434) is a cover body structure with a concave section, the limiting buffer structure (3435) comprises a circular table column with one end penetrating into a cavity of the anchor ring cover (3434), the outer diameter of the circular table column is gradually reduced in the direction of the anchor ring cover (3434) towards the impact-resistant anchor ring (3433), the anchor assembly (341) penetrates through the circular table column and is in limit fit with the inner wall of the through hole of the circular table column, the shape of the through hole of the impact-resistant anchor ring (3433) is matched with the shape of the circular table column, the radial size of the through hole of the impact-resistant anchor ring (3433) is smaller than the radial size of the circular table column, under the condition that the anchor ring cover (3434) is screwed down with the anchor assembly (341), a gap is formed between the bottom wall of the anchor ring (3433) and the bottom wall of the cavity of the anchor ring cover (3434) and is formed below the circular column, and the buffer assembly (3433) can be compressed to enable the whole structure (344) to be extended in the direction of the whole structure (344) to be extended.

6. The support system testing device according to claim 1, wherein the impact part further comprises a guide seat (22), a guide rail (11) is arranged in the frame body (10), the guide seat (22) is slidably arranged along the guide rail (11) and is in limit fit with the guide rail (11), and the drop hammer (21) is arranged on the guide seat (22) and one end of the drop hammer protrudes out of the bottom wall of the guide seat (22).

7. The support system testing device according to claim 6, wherein the impact portion further comprises a clamping assembly (23) and a resetting assembly (24) arranged at the top of the frame body (10), the clamping assembly (23) is used for clamping the guide seat (22) and the clamping position is located at the top area of the frame body (10), and the resetting assembly (24) is used for resetting the guide seat (22) and the drop hammer (21) which are abutted with the support assembly (34) to the clamping position of the clamping assembly (23); wherein, under the condition that the clamping component (23) releases the guide seat (22), the guide seat (22) and the drop hammer (21) freely fall down and impact the impact cushion block (322).

8. The support system testing device according to claim 6, wherein the impact portion further comprises a plurality of weight members (25), the plurality of weight members (25) being detachably provided in the guide holder (22) to adjust a falling speed of the drop hammer (21) and an impact force to the rock mass (32).

9. The support system testing device according to claim 1, wherein the metal cushion layer is woven by a plurality of horizontally arranged W-shaped corrugated steel bar meshes to form a grid-shaped steel bar mesh, the connection positions of any two W-shaped corrugated steel bar meshes are welded, and the rubber cushion layer is formed by alternately stacking a plurality of rubber layers and a plurality of steel wire plate layers.

10. The support system testing device according to claim 1, wherein the support frame (31) includes a cross member (311) and a plurality of stand columns (312), the plurality of stand columns (312) being distributed at a bottom of the frame body (10) along a circumferential direction of the frame body (10), the cross member (311) being provided on the plurality of stand columns (312), and an area surrounded by the cross member (311), the plurality of stand columns (312), and the bottom of the frame body (10) being used for mounting the support portion (30).