A test device for simulating the impact of a TBM cutter on a jointed rock mass

Abstract

The present application relates to the field of rock mass measurement, especially to a test device for simulating the impact of TBM cutter on jointed rock mass, aiming at the problem that the sample device in the prior art needs to make standard samples, which affects the improvement of test efficiency, and proposes the following scheme, which comprises a test table, a bottom plate and a cutter are installed on the top surface of the test table, a chute is formed in the top surface of the bottom plate, a material conveying auger is installed in the chute and is in transmission connection with the cutter, a top plate is installed on the top surface of the bottom plate, a material fixing mechanism and a pushing mechanism are installed on the bottom surface of the top plate, the pushing mechanism comprises a mounting plate slidingly connected to the bottom surface of the top plate, a fixed plate fixedly connected to the bottom surface of the mounting plate and an extension piece installed on the bottom surface of the top plate, and the output end of the extension piece is fixedly connected with the fixed plate. The present application can not only conveniently fix rock mass samples with different shapes, thereby saving the time for making standard samples and improving the efficiency of the samples, but also conveniently clean the broken rock mass samples.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rock mass measurement, and in particular to a test device for simulating the impact of a TBM cutter on a jointed rock mass. BACKGROUND

[0002] A TBM (Tunnel Boring Machine) is a common construction device in underground engineering construction. Unlike the traditional drill-and-blast method, the TBM mainly uses mechanical rock breaking to achieve tunnel excavation. The cutter is the main rock breaking tool. During the process of cutting the rock mass with the cutter, the rock mass will exert significant impact loads on the cutter. These impact loads on the cutter will cause damage to the cutter. In order to study the impact of different rock masses on the cutter, a special experimental device is needed to simulate the impact of different cutters in different rock masses.

[0003] In the prior art, a very regular rock sample needs to be made before the experiment. This is necessary to fix the rock sample during use. However, making a regular rock sample requires a lot of time, which affects the improvement of test efficiency. In addition, the rock debris generated during the test also needs to be cleaned in a timely manner. Therefore, the present application proposes a test device for simulating the impact of a TBM cutter on a jointed rock mass. SUMMARY

[0004] The test device for simulating the impact of a TBM cutter on a jointed rock mass proposed by the present application solves the problem of the test sample device in the prior art that requires the production of standard samples, which affects the improvement of test efficiency.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A test device for simulating the impact of a TBM cutter on a jointed rock mass, comprising a test table, wherein the top surface of the test table is provided with a bottom plate and a cutter, the top surface of the bottom plate is provided with a chute, and the chute is provided with a material conveying auger connected in transmission with the cutter, the top surface of the bottom plate is provided with a top plate, the bottom surface of the top plate is provided with a material fixing mechanism and a pushing mechanism;

[0007] The pushing mechanism comprises a mounting plate slidingly connected to the bottom surface of the top plate, a fixed plate fixedly connected to the bottom surface of the mounting plate, and an extension piece mounted on the bottom surface of the top plate, wherein the output end of the extension piece is fixedly connected to the fixed plate.

[0008] The solid material mechanism comprises a mounting ring hinged at the bottom surface of the mounting plate, a solid material ring fixed at the inner side of the mounting ring, an annular fixing air bag fixed on the inner ring of the mounting ring, a top rod movably inserted into the outer ring of the solid material ring, and an inflator mounted on the bottom surface of the mounting plate for inflating the fixing air bag, wherein the top rod is arranged radially along the mounting ring, and one end of the top rod is fixed with a pad block fixedly connected with the inner ring of the fixing air bag, and the other end of the top rod extends to the inner side of the solid material ring.

[0009] The fixing plate is further provided with a driving mechanism for adjusting the inclination angle of the mounting ring, which comprises a screw rod rotatably connected to the fixing plate, a screw sleeve threadedly connected to the outer periphery of the screw rod, a connecting rod hingedly connected to the outer periphery of the screw sleeve, and a transmission assembly mounted on the fixing plate for driving the screw rod to rotate, wherein the other end of the connecting rod is hingedly connected to the bottom of the back surface of the mounting ring.

[0010] By the above technical scheme, the rock sample of different shapes can be conveniently fixed, thereby saving the time for making standard samples and improving the efficiency of the samples, and the broken rock sample can be conveniently cleaned.

[0011] As a further improvement of the above scheme, the top surface of the test bench is fixedly connected with a fixing block, the front surface of the fixing block is rotatably connected with a fixing shaft, the rolling cutter is fixed at one end of the fixing shaft, and the back surface of the fixing block is provided with a motor, and the output shaft of the motor is in transmission connection with the fixing shaft.

[0012] By the above technical scheme, the rotation of the motor drives the rolling cutter to rotate.

[0013] As a further improvement of the above scheme, the chute is an isosceles trapezoidal mechanism with a wide upper part and a narrow lower part, one end of the material conveying auger is rotatably connected with the fixing block, and the material conveying auger and the fixing shaft are in transmission connection through a belt, a protective cover is arranged on the outer periphery of the belt, and the protective cover is fixed on the back surface of the fixing block.

[0014] By the above technical scheme, the material conveying auger can be driven to rotate simultaneously with the rotation of the fixing shaft.

[0015] As a further improvement of the above scheme, the mounting plate is slidably connected with the top plate through a first sliding connector, the bottom surface of the top plate is provided with a first sliding groove for mounting the first sliding connector, the first sliding connector comprises a limiting rod fixedly arranged inside the first sliding groove along the length direction of the first sliding groove, and a sliding sleeve movably arranged on the outer periphery of the limiting rod, and the sliding sleeve is fixedly connected with the top surface of the mounting plate.

[0016] By the above technical scheme, the mounting plate can stably slide on the top surface of the top plate.

[0017] As a further improvement of the above scheme, the bottom surface of the mounting plate is provided with a mounting groove, and a connecting block is rotatably connected in the mounting groove, and the bottom of the connecting block is fixedly connected with the top of the outer periphery of the mounting ring.

[0018] Through the technical scheme, the mounting ring can rotate on the bottom surface of the mounting plate.

[0019] As a further improvement of the above scheme, the outer periphery of the ejector rod is sleeved with a buffer air bag, the buffer air bag is located between the cushion block and the outer ring of the solid material ring, a gas vent is formed on the buffer air bag, and an anti-skid pad is fixed to one end of the ejector rod located on the inner side of the solid material ring.

[0020] Through the technical scheme, the sudden movement of the ejector rod after losing the reaction force of the rock sample can be effectively avoided.

[0021] As a further improvement of the above scheme, the transmission assembly comprises a transmission shaft rotatably connected to the outer wall of the fixed plate on the side close to the mounting ring, an adjusting rod fixed to one end of the transmission shaft, a fixed gear sleeved on the outer periphery of the screw rod, and a transmission rack slidably connected to the fixed plate through a second sliding piece, the transmission rack is engaged with the fixed gear, the outer periphery of the transmission shaft is sleeved with a linkage gear, one side of the transmission rack is fixed with a linkage rack engaged with the linkage gear, the second sliding piece is the same in structure as the first sliding piece, and a second sliding groove for mounting the second sliding piece is mounted on the fixed plate.

[0022] Through the technical scheme, the screw rod can be conveniently driven to rotate by rotating the transmission shaft.

[0023] As a further improvement of the above scheme, a positioning bolt is threadedly connected to the adjusting rod, two positioning holes are formed in the side surface of the fixed plate, and the positioning holes are matched with the positioning bolt.

[0024] Through the technical scheme, the adjusting rod can be locked.

[0025] As a further improvement of the above scheme, a baffle is fixed to the side of the mounting ring close to the fixed plate, a fixed sleeve is fixed to the inner wall of the side of the baffle close to the fixed plate, a movable rod is movably sleeved in the fixed sleeve, one end of the movable rod extends to the inner side of the mounting ring, a limiting plate is fixed to one end of the movable rod located on the inner side of the mounting ring, a locking bolt is screwed on the outer periphery of the fixed sleeve, and one end of the locking bolt abuts against the outer periphery of the movable rod.

[0026] Through the technical scheme, the limiting plate is abutted against the rock sample, and the position of the limiting plate can be conveniently adjusted.

[0027] As a further improvement of the above scheme, the baffle is fixed with a hollow fixing ring near one side of the fixing plate, a fixing pipe is installed on the fixing plate, one end of the fixing pipe is communicated with the fixing air bag through a hose, the other end of the fixing pipe is communicated with the inside of the fixing ring through a connecting pipe, a valve is installed on the fixing pipe, one end of the valve rod of the valve is fixedly connected with the transmission shaft, a plurality of air injection holes are arranged on the side of the baffle away from the fixing plate and communicated with the inside of the fixing ring.

[0028] Through the above technical scheme, the opening and closing of the valve can be completed while the transmission shaft rotates, and then the air in the fixing air bag can be conveniently discharged and used for cleaning the rock sample on the inside of the fixing ring.

[0029] Compared with the prior art, the beneficial effects of the present application are that:

[0030] 1. Through the setting of the fixing mechanism, the rock samples of different shapes can be conveniently fixed, thereby greatly reducing the time consumed for making standard rock samples, improving the efficiency of the experiment, and reducing the difficulty of the experiment.

[0031] 2. Through the cooperation between the material conveying auger and the fixing shaft, the fixing shaft can drive the rolling cutter to rotate while driving the material conveying auger to rotate, so that the broken rock can be timely conveyed out of the chute.

[0032] 3. Through the setting of the driving mechanism, the inclination angle of the fixing mechanism can be conveniently adjusted, so that the installation ring can be conveniently tilted after the test is completed, and then the broken rock on the inside of the fixing ring 11 can be conveniently poured out.

[0033] 4. Through the cooperation between the fixing ring, the air injection hole, the valve, the fixing pipe and the transmission shaft, the valve can be opened or closed while the installation ring is driven to tilt, and then the broken rock on the inside of the fixing ring can be blown out to the outside of the fixing ring by the discharge of the air in the fixing air bag, thereby further enhancing the cleaning effect of the fixing ring. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a perspective view of the present application;

[0035] Figure 2 is a structural schematic view of the sliding groove and the installation groove of the present application;

[0036] Figure 3 is a structural schematic view of the fixing mechanism of the present application;

[0037] Figure 4 is a structural schematic view of the fixing gear and the transmission rack;

[0038] Figure 5Structure diagram of the adjusting member, the fixing ring and the driving mechanism;

[0039] Figure 6 Sectional view of the material fixing mechanism;

[0040] Figure 7 Front view of the present application;

[0041] Figure 8 Structure diagram of the material conveying auger and the material tank.

[0042] Main symbol explanation:

[0043] 1, test bench; 2, bottom plate; 3, top plate; 4, mounting plate; 5, fixed plate; 6, fixed shaft; 7, material tank; 8, hob; 9, material conveying auger; 10, protective cover; 11, mounting ring; 12, screw; 13, screw sleeve; 14, connecting pipe; 15, discharge port; 16, limiting rod; 17, sliding sleeve; 18, telescopic member; 19, connecting block; 20, transmission rack; 21, adjusting rod; 22, linkage rack; 23, positioning bolt; 24, positioning hole; 25, connecting rod; 26, fixed pipe; 27, valve; 28, linkage gear; 29, transmission shaft; 30, buffer air bag; 31, fixed air bag; 32, material fixing ring; 33, non-slip pad; 34, top rod; 35, fixed gear; 36, limiting ring; 37, air release hole; 38, cushion block; 39, air injection hole; 40, movable rod; 41, fixed sleeve; 42, fixed ring; 43, fixed block; 44, inflator; 45, limiting plate. DETAILED DESCRIPTION

[0044] Hereinafter, the present application will be further described in conjunction with the drawings and the specific embodiments. It should be noted that, under the premise of no conflict, the following described embodiments or technical features can be combined to form new embodiments.

[0045] Embodiment 1

[0046] Please combine Figure 1 - Figure 8The test device for simulating the impact of TBM cutters in jointed rock mass of the embodiment comprises a test table 1, a bottom plate 2 and a cutter 8 installed on the top surface of the test table 1, a chute 7 opened on the top surface of the bottom plate 2, a material conveying auger 9 installed in the chute 7 and in transmission connection with the cutter 8, a discharge port 15 opened on the top surface of the test table 1 and located directly below the outlet of the chute 7, a fixed block 43 fixedly connected to the top surface of the test table 1, a fixed shaft 6 rotationally connected to the front surface of the fixed block 43, the cutter 8 being fixed to one end of the fixed shaft 6, a motor installed on the back surface of the fixed block 43, the output shaft of the motor being in transmission connection with the fixed shaft 6, the chute 7 being an isosceles trapezoidal mechanism with a wide top and a narrow bottom, one end of the material conveying auger 9 being rotationally connected to the fixed block 43 and the material conveying auger 9 being in transmission connection with the fixed shaft 6 through a belt, a protective cover 10 being provided on the outer periphery of the belt and fixed to the back surface of the fixed block 43, the rotation of the motor driving the rotation of the fixed shaft 6 and thus the cutter 8, and the rotation of the fixed shaft 6 driving the rotation of the material conveying auger 9 through the belt, so that the rock falling into the chute 7 can be conveyed to the discharge port for discharge.

[0047] A top plate 3 is installed on the top surface of the bottom plate 2, a material fixing mechanism and a pushing mechanism are installed on the bottom surface of the top plate 3, the pushing mechanism comprising a mounting plate 4 slidingly connected to the bottom surface of the top plate 3, a fixed plate 5 fixedly connected to the bottom surface of the mounting plate 4 and an extension piece 18 installed on the bottom surface of the top plate 3, the output end of the extension piece 18 being fixedly connected to the fixed plate 5, the extension piece 18 being an electric telescopic rod, the extension and retraction of the extension piece 18 driving the movement of the mounting plate 4 and the fixed plate 5.

[0048] The mounting plate 4 is slidingly connected to the top plate 3 through a first sliding connector, a first sliding groove is opened on the bottom surface of the top plate 3 for mounting the first sliding connector, the first sliding connector comprising a limiting rod 16 fixedly connected to the inside of the first sliding groove along the length direction of the first sliding groove and a sliding sleeve 17 movably sleeved on the outer periphery of the limiting rod 16, the sliding sleeve 17 being fixedly connected to the top surface of the mounting plate 4, the top surface of the mounting plate 4 being in abutment with the bottom surface of the top plate 3, the mounting plate 4 moving along the length direction of the limiting rod 16.

[0049] The solid material mechanism comprises a mounting ring 11 hinged at the bottom surface of the mounting plate 4, a solid material ring 32 fixed at the inner side of the mounting ring 11, an annular fixing air bag 31 fixed on the inner circle of the mounting ring 11, a top rod 34 movably inserted into the outer circle of the solid material ring 32, and an air inflator 44 mounted on the bottom surface of the mounting plate 4 for inflating the fixing air bag 31, wherein the bottom surface of the mounting plate 4 is provided with a mounting groove, the mounting groove is rotatably connected with a connecting block 19, the bottom of the connecting block 19 is fixedly connected with the outer peripheral top of the mounting ring 11, the top rod 34 is arranged along the radial direction of the mounting ring 11, one end of the top rod 34 is fixedly connected with a pad 38 fixedly connected with the inner circle of the fixing air bag 31, the other end of the top rod 34 extends to the inner side of the solid material ring 32, and after the air inflator 44 inflates the fixing air bag 31, the fixing air bag 31 expands, so that the top rod 34 is pressed into the solid material ring 32, and the top rod 34 abuts against the outer periphery of the rock sample on the inner side of the solid material ring 32, so that the sample can be clamped, and due to the flexible characteristics of the fixing air bag 31, the length of the top rod 34 entering into the inner side of the solid material ring 32 can be changed according to the shape of the outer periphery of the rock sample, so that the sample with irregular shape can be conveniently and quickly fixed.

[0050] The inner circle of the mounting ring 11 is fixedly connected with two limiting rings 36 coaxially arranged, and the two limiting rings 36 are respectively located on the two sides of the fixing air bag 31, so that the limiting rings 36 can effectively avoid the expansion of the fixing air bag 31 to the two sides.

[0051] The fixed plate 5 is further provided with a driving mechanism for adjusting the inclination angle of the mounting ring 11, which comprises a screw rod 12 rotatably connected to the fixed plate 5, a screw sleeve 13 threadedly sleeved on the outer periphery of the screw rod 12, a connecting rod 25 hingedly connected to the outer periphery of the screw sleeve 13, and a transmission assembly for driving the screw rod 12 to rotate and mounted on the fixed plate 5. The other end of the connecting rod 25 is hingedly connected to the bottom of the back surface of the mounting ring 11. The transmission assembly comprises a transmission shaft 29 rotatably connected to the outer wall of the fixed plate 5 near the side of the mounting ring 11, an adjusting rod 21 fixed to one end of the transmission shaft 29, a fixed gear 35 sleeved on the outer periphery of the screw rod 12, and a transmission rack 20 slidably connected to the fixed plate 5 through a second sliding connector. The transmission rack 20 is in meshing connection with the fixed gear 35. The outer periphery of the transmission shaft 29 is sleeved with a linkage gear 28. One side of the transmission rack 20 is fixedly provided with a linkage rack 22 in meshing connection with the linkage gear 28. The second sliding connector is identical in structure to the first sliding connector. The fixed plate 5 is provided with a second sliding groove for mounting the second sliding connector. The rotation of the transmission shaft 29 drives the linkage gear 28 to rotate, which in turn drives the linkage rack 22 and the transmission rack 20 to move. The rotation of the fixed gear 35 is driven by the movement of the transmission rack 20. The rotation of the screw rod 12 is driven by the rotation of the fixed gear 35. When the screw rod 12 rotates in the normal direction, the screw sleeve 13 moves towards the side of the fixed plate 5, thereby driving the mounting ring 11 to rotate towards the side of the fixed plate 5, facilitating the pouring of the rock in the solid material ring 32, and the adjusting rod 21 is arranged to facilitate the rotation of the transmission shaft 29.

[0052] The adjusting rod 21 is threadedly connected with a positioning bolt 23. Two positioning holes 24 are formed in the side surface of the fixed plate 5 and are in cooperation with the positioning bolt 23. The two positioning holes 24 are located on the rotation path of the positioning bolt 23. The adjusting rod 21 is locked after the positioning bolt 23 is clamped in the positioning hole 24.

[0053] The implementation principle of the embodiment is as follows. During testing, the rock sample to be tested is first placed in the solid material ring 32, and then the air compressor 44 is started to inflate the fixed air bag 31. After the fixed air bag 31 is inflated and expanded, the top rod 34 is pressed towards the inside of the solid material ring 32, so that one end of the top rod 34 located in the solid material ring 32 abuts against the outer periphery of the rock sample, thereby completing the fixation of the rock sample. Then the motor is started to drive the rolling cutter 8 and the material conveying auger 9 to rotate, and then the telescopic member 18 is extended, thereby pushing the mounting plate 4 to move towards the side of the rolling cutter 8 until the rolling cutter 8 contacts the rock sample, so as to perform the impact experiment of the rolling cutter 8. After the experiment is completed, the pressure applied by the rock sample on the rolling cutter 8 is calculated according to the output pushing force of the telescopic member 18. Finally, the damage of the rolling cutter 8 is analyzed.

[0054] The broken rock sample falls into the chute 7 during the contact between the cutter 8 and the rock sample, and is then conveyed to the discharge port 15 under the rotation of the conveying auger 9, thereby avoiding the accumulation of the rock sample on the top surface of the base plate 2.

[0055] After the test, the positioning bolt 23 is screwed out of the positioning hole 24, and then the adjusting rod is held and rotated clockwise, so that the transmission shaft 29 can be easily driven to rotate forward, the transmission shaft 29 drives the linkage rack 22 to move downward, the linkage rack 22 drives the transmission rack 20 to move downward, the transmission rack 20 drives the fixed gear 35 to rotate forward, thereby driving the screw rod 12 to rotate forward, the screw rod 12 drives the screw sleeve 13 to move towards the side of the fixed plate 5, thereby driving the mounting ring 11 to rotate towards the side of the fixed plate 5, so that the broken rock sample in the solid material ring 32 can be easily poured out. After the rock sample in the solid material ring 32 is cleaned, the adjusting rod 21 is rotated counterclockwise to return to the original position, and then the positioning bolt 23 is screwed into a positioning hole 24 in the position to lock the adjusting rod 21.

[0056] Example 2

[0057] In combination Figure 3 - Figure 6 This embodiment is further improved on the basis of example 1, wherein the outer periphery of the top rod 34 is sleeved with a buffer air bag 30, the buffer air bag 30 is located between the cushion block 38 and the outer circle of the solid material ring 32, a gas vent 37 is formed in the buffer air bag 30, and the end of the top rod 34 inside the solid material ring 32 is fixed with an anti-skid pad 33. The anti-skid pad 33 can effectively prevent the rock sample from slipping with the top rod 34.

[0058] The implementation principle of this embodiment is that the fixed air bag 31 gradually compresses the buffer air bag 30 while expanding, and the air in the buffer air bag 30 is slowly discharged through the gas vent 37. When the rock sample is broken, the buffer air bag 30 provides a buffer, so that the top rod 34 does not suddenly elongate due to the sudden loss of the reaction force from the rock sample, thereby achieving the buffering effect.

[0059] Example 3

[0060] In combination Figure 4 - Figure 6The further improvement of the embodiment is that the blocking plate is fixed with a hollow fixing ring 42 close to one side of the fixing plate 5, the fixing tube 26 is installed on the fixing plate 5, one end of the fixing tube 26 is communicated with the fixing air bag 31 through a hose, the other end of the fixing tube 26 is communicated with the inside of the fixing ring 42 through the connecting tube 14, the valve 27 is installed on the fixing tube 26, one end of the valve rod of the valve 27 is fixedly connected with the transmission shaft 29, a plurality of air injection holes 39 which are communicated with the inside of the fixing ring 42 are arranged on the side of the blocking plate away from the fixing plate 5, and the air injection holes 39 are located inside the fixed material ring 32, the valve rod of the valve 27 can be driven to rotate at the same time when the transmission shaft 29 rotates, so that the opening and closing of the valve 27 can be completed at the same time when the driving of the installation ring 11 is rotated.

[0061] The implementation principle of the embodiment is that the back of the rock mass sample fixed in the fixed material ring 32 can be pressed by the limiting plate 45, and when the position of the limiting plate 45 is adjusted, the locking bolt can be loosened first, then the movable rod 40 is moved to adjust the position of the limiting plate 45, and then the locking bolt is tightened.

[0062] Embodiment 4

[0063] Combined with Figure 2 - Figure 7 The further improvement of the embodiment is that the blocking plate is fixed with a hollow fixing ring 42 close to one side of the fixing plate 5, the fixing tube 26 is installed on the fixing plate 5, one end of the fixing tube 26 is communicated with the fixing air bag 31 through a hose, the other end of the fixing tube 26 is communicated with the inside of the fixing ring 42 through the connecting tube 14, the valve 27 is installed on the fixing tube 26, one end of the valve rod of the valve 27 is fixedly connected with the transmission shaft 29, a plurality of air injection holes 39 which are communicated with the inside of the fixing ring 42 are arranged on the side of the blocking plate away from the fixing plate 5, and the air injection holes 39 are located inside the fixed material ring 32, the valve rod of the valve 27 can be driven to rotate at the same time when the transmission shaft 29 rotates, so that the opening and closing of the valve 27 can be completed at the same time when the driving of the installation ring 11 is rotated.

[0064] The implementation principle of the embodiment is that when the transmission shaft 29 rotates forward, the driving rack 20 moves downward, and at the same time, the fixed gear 35 rotates forward under the driving of the driving rack 20, the screw rod 12 also rotates forward under the driving of the fixed gear 35, the screw sleeve 13 moves close to the fixing plate 5, so as to drive the installation ring 11 to rotate towards the side close to the fixing plate 5, and then the rock mass in the fixed material ring 32 is poured out, at the same time, the valve rod of the valve 27 rotates forward under the driving of the transmission shaft 29, the valve 27 is opened, and the air in the fixing air bag 31 enters into the fixing ring 42 through the fixing tube 26, and then is sprayed out from the air injection hole 39, so that the residual rock mass in the fixed material ring 32 can be blown out, and the rock mass in the fixed material ring 32 can be cleaned more thoroughly.

[0065] The above embodiments are only the preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the protection scope of the present application.

Claims

1. A test device for simulating the impact of a TBM cutter on a jointed rock mass, comprising a test bed, characterised in that, The bottom plate is provided with a material groove in the top surface, and a material conveying auger is mounted in the material groove and connected with the hob in transmission. The pushing mechanism comprises a mounting plate slidingly connected to the bottom surface of the top plate, a fixed plate fixed to the bottom surface of the mounting plate, and an extension member mounted on the bottom surface of the top plate, with the output end of the extension member fixed to the fixed plate. The fixed plate is further provided with a driving mechanism for adjusting the inclination angle of the mounting ring, which comprises a screw rod rotatably connected to the fixed plate, a screw sleeve threadedly connected to the outer periphery of the screw rod, a connecting rod hingedly connected to the outer periphery of the screw sleeve, and a transmission assembly mounted on the fixed plate for driving the screw rod to rotate, with the other end of the connecting rod hingedly connected to the bottom of the back surface of the mounting ring. The fixed block is provided with a fixed shaft rotatably connected to the front surface, and the hob is fixed to one end of the fixed shaft.

2. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 1, characterized in that, The material groove is in the shape of an isosceles trapezoid with the width increasing from top to bottom, one end of the material conveying auger is rotatably connected to the fixed block, and the material conveying auger is connected to the fixed shaft through a belt transmission.

3. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 2, characterized in that, The outer periphery of the belt is provided with a protective cover fixed to the back surface of the fixed block.

4. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 1, characterized in that, The mounting plate is slidingly connected to the top plate through a first sliding connector, the bottom surface of the top plate is provided with a first sliding groove for mounting the first sliding connector, the first sliding connector comprises a limiting rod fixed to the inside along the length direction of the first sliding groove, and a sliding sleeve movably sleeved on the outer periphery of the limiting rod, with the sliding sleeve fixed to the top surface of the mounting plate.

5. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 1, characterized in that, The bottom surface of the mounting plate is provided with a mounting groove, and a connecting block is rotatably connected in the mounting groove, with the bottom of the connecting block fixed to the top of the outer periphery of the mounting ring.

6. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 1, characterized in that, The outer periphery of the top rod is sleeved with a buffer air bag, which is located between the pad and the outer periphery of the material retaining ring, and a deflation hole is provided on the buffer air bag, with an anti-skid pad fixed to one end of the top rod inside the material retaining ring.

7. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 4, characterized in that, The transmission assembly comprises a transmission shaft rotatably connected to the outer wall of the fixed plate near the mounting ring, an adjusting rod fixed to one end of the transmission shaft, a fixed gear sleeved on the outer periphery of the screw rod, and a transmission rack slidingly connected to the fixed plate through a second sliding connector, with the transmission rack meshing with the fixed gear, the outer periphery of the transmission shaft is sleeved with a linkage gear, one side of the transmission rack is fixed with a linkage rack meshing with the linkage gear, the second sliding connector is the same as the first sliding connector, and the fixed plate is provided with a second sliding groove for mounting the second sliding connector.

8. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 7, characterized in that, A positioning bolt is threadedly connected to the adjusting rod, and two positioning holes are provided on the side surface of the fixed plate and matched with the positioning bolt.

9. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 7, characterized in that, The mounting ring is fixed with a baffle on the side close to the fixed plate, the baffle is fixed with a fixed sleeve on the inner wall of the side close to the fixed plate, a movable sleeve is movably arranged in the fixed sleeve, and a movable rod extends to the inner side of the mounting ring from one end of the movable rod.

10. The test device for simulating the impact of TBM cutters in jointed rock mass according to claim 9, characterized in that, The baffle is fixed with a hollow fixed ring on the side close to the fixed plate, the fixed plate is provided with a fixed tube, one end of the fixed tube is communicated with the fixed air bag through a hose, the other end of the fixed tube is communicated with the inside of the fixed ring through a connecting pipe, the fixed tube is provided with a valve, and one end of a valve rod of the valve is fixedly connected with a transmission shaft. The baffle is fixed with a hollow fixed ring on the side close to the fixed plate, the fixed plate is provided with a fixed tube, one end of the fixed tube is communicated with the fixed air bag through a hose, the other end of the fixed tube is communicated with the inside of the fixed ring through a connecting pipe, the fixed tube is provided with a valve, and one end of a valve rod of the valve is fixedly connected with a transmission shaft.

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