Testing device for simulating impact effect of TBM hob in jointed rock mass

Abstract

The invention relates to the field of rock mass measurement, in particular to a test device for simulating the impact effect of a TBM (Tunnel Boring Machine) hob in jointed rock mass, and aims to solve the problem that the improvement of the test efficiency is influenced due to the fact that a sample device in the prior art needs to manufacture a standard sample, the following scheme is provided: the test device comprises a test board, and a bottom plate and a hob are mounted on the top surface of the test board; a material groove is formed in the top face of the bottom plate, a material conveying auger in transmission connection with the hob is installed in the material groove, a top plate is installed on the top face of the bottom plate, and a material fixing mechanism and a pushing mechanism are installed on the bottom face of the top plate. The propelling mechanism comprises a mounting plate slidably connected to the bottom face of the top plate, a fixing plate fixedly connected to the bottom face of the mounting plate and a telescopic piece mounted on the bottom face of the top plate, and the output end of the telescopic piece is fixedly connected with the fixing plate. According to the invention, rock mass samples with different shapes can be conveniently fixed in blocks, so that the time for manufacturing standard samples is saved, the efficiency of the samples is improved, and the broken rock mass samples can be conveniently cleaned.

Description

Technical Field

[0001] The invention relates to the field of rock mass measurement, and in particular to a test device for simulating the impact of a TBM cutter in a jointed rock mass. Background Art

[0002] TBM (full-section rock tunneling machine) is a common construction equipment in underground engineering construction. Different from the traditional drilling and blasting method, TBM mainly uses mechanical rock breaking methods to achieve tunnel rock excavation, and the roller cutter is the main rock breaking tool. In the process of the roller cutter cutting the rock mass, the rock mass will bring significant impact loads to the roller cutter. These impact loads act on the roller cutter and cause damage to the tool. Therefore, in order to study the impact of different rock masses on the roller cutter, it is necessary to use special experimental equipment to simulate the impact experiment of different roller cutters in different rock masses.

[0003] However, in the experimental device in the prior art, it is first necessary to make a very regular rock sample during the experiment, so that the rock sample can be fixed during use. However, making a regular rock sample takes a lot of time, which affects the improvement of the test efficiency. In addition, the rock debris generated during the test also needs to be cleaned up in time. Therefore, this scheme proposes a test device that simulates the impact of TBM cutter in jointed rock. Summary of the invention

[0004] The present invention provides a test device for simulating the impact of a TBM cutter in a jointed rock mass, which solves the problem in the prior art that a sample device needs to produce a standard sample, which affects the improvement of the test efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A test device for simulating the impact of a TBM cutter in a jointed rock mass, comprising a test bench, a bottom plate and a cutter are installed on the top surface of the test bench, a material trough is provided on the top surface of the bottom plate, a feeding auger connected to the cutter is installed in the material trough, a top plate is installed on the top surface of the bottom plate, and a solid material mechanism and a propulsion mechanism are installed on the bottom surface of the top plate;

[0007] The propulsion mechanism comprises a mounting plate slidably connected to the bottom surface of the top plate, a fixing plate fixedly connected to the bottom surface of the mounting plate, and a telescopic member installed on the bottom surface of the top plate, wherein the output end of the telescopic member is fixedly connected to the fixing plate;

[0008] The solid material mechanism comprises a mounting ring connected to the bottom surface of the mounting plate, a solid material ring fixed to the inner side of the mounting ring, an annular fixed airbag fixed to the inner ring of the mounting ring, a push rod movably plugged into the outer ring of the mounting ring, and an inflator installed on the bottom surface of the mounting plate for inflating air into the fixed airbag, wherein the push rod is arranged radially along the mounting ring, and a pad fixed to the inner ring of the fixed airbag is fixed at one end of the push rod, and the other end of the push rod extends to the inner side of the solid material ring;

[0009] The fixing plate is also provided with a driving mechanism for adjusting the inclination angle of the mounting ring, the driving mechanism comprising a screw rotatably connected to the fixing plate, a screw sleeve threadedly sleeved on the outer periphery of the screw, a connecting rod hinged on the outer periphery of the screw sleeve, and a transmission assembly installed on the fixing plate for driving the screw to rotate, the other end of the connecting rod being hinged to the bottom of the back side of the mounting ring.

[0010] Through the above technical solution, not only can rock samples of different shapes be fixed conveniently, thereby saving the time of making standard samples and improving the efficiency of samples, but also the broken rock samples can be cleaned conveniently.

[0011] As a further improvement of the above scheme, a fixed block is fixedly connected to the top surface of the test bench, a fixed shaft is rotatably connected to the front of the fixed block, the hob is fixed to one end of the fixed shaft, a motor is installed on the back of the fixed block, and the output shaft of the motor is transmission-connected to the fixed shaft.

[0012] Through the above technical solution, the rotation of the motor is used to drive the roller to rotate.

[0013] As a further improvement of the above scheme, the material trough is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom. One end of the feed auger is rotatably connected to the fixed block, and the feed auger is connected to the fixed shaft through a belt drive. A protective cover is provided on the outer periphery of the belt, and the protective cover is fixed on the back of the fixed block.

[0014] Through the above technical solution, the feed auger can be driven to rotate while the fixed shaft rotates.

[0015] As a further improvement of the above scheme, the mounting plate is slidably connected to the top plate through a first sliding member, and a first sliding groove for installing the first sliding member is opened on the bottom surface of the top plate. The sliding member includes a limiting rod fixed inside the first sliding groove along the length direction of the first sliding groove and a sliding sleeve movably mounted on the outer periphery of the limiting rod, and the sliding sleeve is fixedly connected to the top surface of the mounting plate.

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

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

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

[0019] As a further improvement of the above scheme, a cushioning airbag is provided on the outer periphery of the push rod, and the cushioning airbag is located between the cushion block and the outer ring of the solid material ring, and an air vent hole is opened on the cushioning airbag, and an anti-slip pad is fixed to one end of the top cover located on the inner side of the solid material ring.

[0020] The above technical solution can effectively prevent the mandrel from moving suddenly after losing the reaction force of the rock sample.

[0021] As a further improvement of the above scheme, the transmission assembly includes a transmission shaft rotatably connected to the outer wall of the fixed plate 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 member, the transmission rack meshing with the fixed gear, a linkage gear sleeved on the outer periphery of the transmission shaft, a linkage rack meshing with the linkage gear fixed on one long side of the transmission rack, the second sliding member has the same structure as the first sliding member, and a second sliding groove for installing the second sliding member is installed on the fixed plate.

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

[0023] As a further improvement of the above solution, a positioning bolt is threadedly connected to the adjusting rod, and two positioning holes are provided on the side of the fixing plate, and the positioning holes cooperate with the positioning bolts.

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

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

[0026] Through the above technical solution, the limit plate is used to abut the rock sample, and the position of the limit plate can also be easily adjusted.

[0027] As a further improvement of the above scheme, a hollow fixing ring is fixed on the side of the baffle plate close to the fixing plate, a fixing tube is installed on the fixing plate, one end of the fixing tube is connected with the fixing airbag through a hose, and the other end of the fixing tube is connected with the inside of the fixing ring through a connecting tube, a valve is installed on the fixing tube, one end of the valve stem of the valve is fixedly connected to the transmission shaft, and a plurality of jet holes connected with the inside of the fixing ring are opened on the side of the baffle plate away from the fixing plate, and the jet holes are located on the inner side of the solid material ring.

[0028] Through the above technical solution, the valve can be opened and closed while the transmission shaft is rotating, so that the air in the fixed airbag can be easily discharged and used to clean the rock sample inside the solid material ring.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Through the setting of the solid material mechanism, rock samples of different shapes can be easily fixed, which greatly reduces the time spent on making standard rock samples, thereby improving the efficiency of the experiment and reducing the difficulty of the experiment.

[0031] 2. Through the cooperation between the feeding auger and the fixed shaft, the fixed shaft can drive the feeding auger to rotate while driving the roller to rotate, so that the broken rock can be transported out of the material trough in time.

[0032] 3. By setting the driving mechanism, the inclination angle of the solid material mechanism can be conveniently adjusted, so that the mounting ring can be driven to tilt after the test is completed, and the broken rock mass inside the solid material ring 11 can be conveniently dumped out.

[0033] 4. Through the cooperation among the fixing ring, the jet hole, the valve, the fixing pipe and the transmission shaft, the valve can be opened or closed while the driving mounting ring is tilted, and then the broken rock inside the solid material ring can be blown out to the outside of the solid material ring by discharging the air in the fixing air bag, thereby further enhancing the effect of cleaning the solid material ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A perspective view of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the slide groove and the mounting groove of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the material solidifying mechanism of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a fixed gear and a transmission rack;

[0038] Figure 5It is a schematic diagram of the structure of the adjusting member, the fixing ring and the driving mechanism;

[0039] Figure 6 It is a cross-sectional view of the solid material mechanism;

[0040] Figure 7 It is a front view of the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of the feeding auger and the material trough.

[0042] Description of main symbols:

[0043] 1. Test bench; 2. Bottom plate; 3. Top plate; 4. Mounting plate; 5. Fixed plate; 6. Fixed shaft; 7. Material trough; 8. Hob; 9. Feeding auger; 10. Protective cover; 11. Mounting ring; 12. Screw; 13. Screw sleeve; 14. Connecting pipe; 15. Discharge port; 16. Limit 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 tube; 27, valve; 28, linkage gear; 29, transmission shaft; 30, cushion airbag; 31, fixed airbag; 32, solid material ring; 33, anti-skid pad; 34, push rod; 35, fixed gear; 36, limit ring; 37, vent hole; 38, cushion block; 39, jet hole; 40, movable rod; 41, fixed sleeve; 42, fixed ring; 43, fixed block; 44, inflator; 45, limit plate. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0045] Embodiment 1:

[0046] Please combine Figure 1 - Figure 8The present embodiment is a test device for simulating the impact of a TBM cutter in a jointed rock mass, comprising a test bench 1, a bottom plate 2 and a cutter 8 are installed on the top surface of the test bench 1, a material trough 7 is provided on the top surface of the bottom plate 2, a feeding auger 9 connected to the cutter 8 is installed in the material trough 7, a discharge port 15 is provided on the top surface of the test bench 1, and the discharge port 15 is located directly below the outlet of the material trough 7, a fixed block 43 is fixedly connected to the top surface of the test bench 1, a fixed shaft 6 is rotatably connected to the front of the fixed block 43, the cutter 8 is fixed to one end of the fixed shaft 6, and a motor is installed on the back of the fixed block 43, The output shaft of the motor is transmission-connected to the fixed shaft 6. The material trough 7 is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom. One end of the feed auger 9 is rotationally connected to the fixed block 43, and the feed auger 9 is connected to the fixed shaft 6 via a belt transmission. A protective cover 10 is provided on the periphery of the belt, and the protective cover 10 is fixed to the back of the fixed block 43. The rotation of the motor drives the fixed shaft 6 to rotate, thereby driving the roller 8 to rotate. While the fixed shaft 6 rotates, the feed auger 9 can be driven to rotate through the belt, so that the rocks that fall into the material trough 7 can be transported to the discharge port for discharge.

[0047] A top plate 3 is installed on the top surface of the bottom plate 2, and a material fixing mechanism and a propulsion mechanism are installed on the bottom surface of the top plate 3. The propulsion mechanism includes a mounting plate 4 slidably connected to the bottom surface of the top plate 3, a fixed plate 5 fixed to the bottom surface of the mounting plate 4, and a telescopic member 18 installed on the bottom surface of the top plate 3. The output end of the telescopic member 18 is fixedly connected to the fixed plate. The telescopic member 18 is an electric telescopic rod, and the telescopic movement of the telescopic member 18 is used to drive the mounting plate 4 and the fixed plate 5 to move.

[0048] The mounting plate 4 is slidably connected with the top plate 3 via a first sliding member. A first sliding groove for installing the first sliding member is provided on the bottom surface of the top plate 3. The sliding member includes a limiting rod 16 fixed inside the first sliding groove along the length direction and a sliding sleeve 17 movably sleeved on the outer periphery of the limiting rod 16. The sliding sleeve 17 is fixedly connected to the top surface of the mounting plate 4. The top surface of the mounting plate 4 abuts against the bottom surface of the top plate 3. When the mounting plate 4 moves, it moves along the length direction of the limiting rod 16.

[0049] The solid material mechanism includes a mounting ring 11 connected to the bottom surface of the mounting plate 4, a solid material ring 32 fixed to the inner side of the mounting ring 11, an annular fixed airbag 31 fixed to the inner ring of the mounting ring 11, a push rod 34 movably plugged on the outer ring of the mounting ring 11, and an inflator 44 installed on the bottom surface of the mounting plate 4 for inflating the fixed airbag 31. The bottom surface of the mounting plate 4 is provided with a mounting groove, and a connecting block 19 is rotatably connected in the mounting groove. The bottom of the connecting block 19 is fixedly connected to the top of the outer periphery of the mounting ring 11. The push rod 34 is arranged radially along the mounting ring 11, and one end of the push rod 34 is fixed with a The pad 38 is fixed to the inner circle of the fixed airbag 31, and the other end of the push rod 34 extends to the inside of the solid material ring 32. After the inflator 44 inflates the fixed airbag 31, the fixed airbag 31 expands, so that the push rod 34 can be squeezed into the solid material tube 32, and the push rod then abuts against the outer periphery of the rock sample located on the inner side of the solid material ring 32, so that the sample can be clamped. Due to the flexible characteristics of the fixed airbag 31, the length of the push rod 34 entering the inner side of the solid material ring 32 can change with the shape of the outer periphery of the rock sample, so that it is convenient to quickly fix the sample with irregular shape.

[0050] Two coaxially arranged limiting rings 36 are fixed to the inner ring of the mounting ring 11 , and the two limiting rings 36 are respectively located on both sides of the fixed airbag 31 . The limiting rings 36 can effectively prevent the fixed airbag 31 from expanding toward both sides.

[0051] The fixed plate 5 is also provided with a driving mechanism for adjusting the inclination angle of the mounting ring 11, the driving mechanism comprises a screw 12 rotatably connected to the fixed plate 5, a screw sleeve 13 threadedly sleeved on the outer periphery of the screw 12, a connecting rod 25 hinged on the outer periphery of the screw sleeve 13, and a transmission assembly installed on the fixed plate 5 for driving the screw 12 to rotate, the other end of the connecting rod 25 is hinged to the bottom of the back side of the mounting ring 11, the transmission assembly comprises a transmission shaft 29 rotatably connected to the outer wall of the fixed plate 5 on one side close to 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 12, and a transmission rack 20 slidably connected to the fixed plate 5 through a second sliding member, the transmission rack 20 meshes with the fixed gear 35, a linkage gear 28 is sleeved on the outer periphery of the transmission shaft 29, and the transmission rack 20 is slidably connected to the fixed plate 5 through a second sliding member. A linkage rack 22 meshing with the linkage gear 28 is fixed to one long side of the second sliding member, the second sliding member has the same structure as the first sliding member, and a second sliding groove for installing the second sliding member is installed on the fixed plate 5. The linkage gear 28 is driven to rotate by rotating the transmission shaft 29, and then the linkage rack 22 and the transmission rack 20 are driven to move by the rotation of the linkage gear 28. After the transmission rack 20 moves, it can drive the fixed gear 35 to rotate. After the fixed gear 35 rotates, it can drive the screw 12 to rotate. When the screw 12 rotates forward, it can drive the screw sleeve 13 to move toward the side close to the fixed plate 5, so that the mounting ring 11 can be driven to rotate toward the side close to the fixed plate 5, so as to facilitate the pouring out of the rock in the solid material ring 32, and the setting of the adjusting rod 21 is convenient for rotating the transmission shaft 29.

[0052] A positioning bolt 23 is threadedly connected to the adjusting rod 21, and two positioning holes 24 are opened on the side of the fixing plate 5, and the positioning holes 24 cooperate with the positioning bolts 23. The two positioning holes 24 are both on the rotation path of the positioning bolts 23. After the positioning bolts 23 are clamped inside the positioning holes 24, the adjusting rod 21 can be locked.

[0053] The implementation principle of this embodiment is as follows: during the test, the rock sample to be tested is first placed in the solid material ring 32, and then the inflator 44 is started to inflate the fixed airbag 31. After the fixed airbag 31 is inflated, the push rod 34 is squeezed toward the inside of the solid material ring 32, so that one end of the push rod 34 located in the solid material ring 32 is pressed against the outer periphery of the rock sample, thereby completing the fixation of the rock sample. After that, the motor can be started to drive the roller cutter 8 and the feed auger 9 to rotate, and then the telescopic member 18 is started to extend, so that the mounting plate 4 can be pushed to move toward the side close to the roller cutter 8 until the roller cutter 8 contacts the rock sample, thereby conducting an impact test of the roller cutter 8. After the test is completed, the pressure exerted by the rock sample on the roller cutter 8 is calculated based on the thrust output by the telescopic member 18, and finally the damage to the roller cutter 8 is analyzed.

[0054] During the contact between the roller cutter 8 and the rock sample, the broken rock snails fall into the material trough 7, and then are transported to the discharge port 15 under the rotation of the feeding auger 9, thereby preventing the rock from accumulating on the top surface of the bottom plate 2;

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

[0056] Embodiment 2:

[0057] Combination Figure 3 - Figure 6 Based on Example 1, this embodiment is further improved in that a cushioning airbag 30 is sleeved on the outer periphery of the push rod 34, and the cushioning airbag 30 is located between the cushion block 38 and the outer ring of the solid material ring 32, and an air venting hole 37 is opened on the cushioning airbag 30, and an anti-skid pad 33 is fixed to one end of the push rod 34 located on the inner side of the solid material ring 32. The setting of the anti-skid pad 33 can effectively prevent slipping between the rock sample and the push rod 34.

[0058] The implementation principle of this embodiment is: the fixed airbag 31 will gradually compress the buffer airbag 30 while expanding, and the air in the buffer airbag 30 will be slowly discharged through the vent hole 37. When the rock sample is ruptured, the buffer airbag 30 will cushion the push rod 34, so that it will not suddenly extend due to the sudden loss of the reaction force given by the rock sample, thereby playing a buffering role.

[0059] Embodiment 3:

[0060] Combination Figure 4 - Figure 6On the basis of embodiments 1-2, the present embodiment is further improved in that: a baffle is fixed on the side of the mounting ring 11 close to the fixing plate 5, a fixing sleeve 41 is fixed on the inner wall of the side of the baffle close to the fixing plate 5, a movable sleeve in the fixing sleeve 41 is provided with a movable rod 40, and one end of the movable rod 40 extends to the inner side of the mounting ring 11, a limiting plate 45 is fixed on the end of the movable rod 40 located on the inner side of the mounting ring 11, a locking bolt is screwed on the outer periphery of the fixing sleeve 41, one end of the locking bolt abuts against the outer periphery of the movable rod 40, and the limiting plate 45 is used to hold the sample when fixing the rock sample to prevent the sample from being pushed open when the roller cutter 8 contacts the rock sample.

[0061] The implementation principle of this embodiment is: the back side of the rock sample fixed in the solid material ring 32 can be supported by the limit plate 45, and when adjusting the position of the limit plate 45, the locking bolt can be loosened first, and then the movable rod 40 can be moved to adjust the position of the limit plate 45. After the adjustment is completed, the locking bolt can be tightened.

[0062] Embodiment 4:

[0063] Combination Figure 2 - Figure 7 On the basis of embodiments 1-3, the present embodiment is further improved in that: a hollow fixing ring 42 is fixed on the side of the baffle plate close to the fixing plate 5, a fixing tube 26 is installed on the fixing plate 5, one end of the fixing tube 26 is connected with the fixing airbag 31 through a hose, and the other end of the fixing tube 26 is connected with the inside of the fixing ring 42 through a connecting tube 14, a valve 27 is installed on the fixing tube 26, one end of the valve stem of the valve 27 is fixedly connected to the transmission shaft 29, a plurality of injection holes 39 connected with the inside of the fixing ring 42 are provided on the side of the baffle plate away from the fixing plate 5, and the injection holes 39 are located on the inner side of the solid material ring 32, and the valve stem of the valve 27 can be driven to rotate while the transmission shaft 29 rotates, so that the valve 27 can be opened and closed while the mounting ring 11 is driven to rotate.

[0064] The implementation principle of this embodiment is as follows: when the transmission shaft 29 rotates forward, the transmission rack 20 moves downward, and when the transmission rack 20 moves downward, it will drive the fixed gear 35 to rotate forward, and the screw rod 12 will also rotate forward under the drive of the fixed gear 35, and the screw sleeve 13 will approach the fixed plate 5, thereby driving the mounting ring 11 to rotate toward the side close to the fixed plate 5, and then the rock in the solid material ring 32 will be poured out. At the same time, the forward rotation of the transmission shaft 29 will drive the valve stem of the valve 27 to rotate forward, and the valve 27 will open accordingly, and the air in the fixed airbag 31 will enter the fixed ring 42 through the fixed pipe 26, and then be ejected from the jet hole 39, so that the residual rock in the solid material ring 32 can be blown out, so that the rock in the solid material ring 32 can be cleaned more cleanly.

[0065] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A test device for simulating the impact of a TBM cutter in a jointed rock mass, comprising a test bench, characterized in that: The top surface of the test bench is equipped with a bottom plate and a roller cutter, the top surface of the bottom plate is provided with a material trough, a material conveying auger connected to the roller cutter is installed in the material trough, the top surface of the bottom plate is equipped with a top plate, and the bottom surface of the top plate is equipped with a material fixing mechanism and a propulsion mechanism; The propulsion mechanism comprises a mounting plate slidably connected to the bottom surface of the top plate, a fixing plate fixedly connected to the bottom surface of the mounting plate, and a telescopic member installed on the bottom surface of the top plate, wherein the output end of the telescopic member is fixedly connected to the fixing plate; The solid material mechanism comprises a mounting ring connected to the bottom surface of the mounting plate, a solid material ring fixed to the inner side of the mounting ring, an annular fixed airbag fixed to the inner ring of the mounting ring, a push rod movably plugged into the outer ring of the mounting ring, and an inflator installed on the bottom surface of the mounting plate for inflating air into the fixed airbag, wherein the push rod is arranged radially along the mounting ring, and a pad fixed to the inner ring of the fixed airbag is fixed at one end of the push rod, and the other end of the push rod extends to the inner side of the solid material ring; The fixing plate is also provided with a driving mechanism for adjusting the inclination angle of the mounting ring, the driving mechanism comprising a screw rotatably connected to the fixing plate, a screw sleeve threadedly sleeved on the outer periphery of the screw, a connecting rod hinged on the outer periphery of the screw sleeve, and a transmission assembly installed on the fixing plate for driving the screw to rotate, the other end of the connecting rod being hinged to the bottom of the back side of the mounting ring.

2. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 1, characterized in that: A fixed block is fixedly connected to the top surface of the test bench, a fixed shaft is rotatably connected to the front of the fixed block, the hob is fixed to one end of the fixed shaft, a motor is installed on the back of the fixed block, and the output shaft of the motor is drivingly connected to the fixed shaft.

3. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 2, characterized in that: The material trough is an isosceles trapezoidal structure that is wide at the top and narrow at the bottom. One end of the feed auger is rotatably connected to the fixed block, and the feed auger is connected to the fixed shaft through a belt drive. A protective cover is provided on the outer periphery of the belt, and the protective cover is fixed to the back of the fixed block.

4. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 1, characterized in that: The mounting plate is slidably connected to the top plate via a first sliding member, a first sliding groove for installing the first sliding member is provided on the bottom surface of the top plate, the sliding member comprises a limiting rod fixed inside the first sliding groove along the length direction thereof and a sliding sleeve movably sleeved on the outer periphery of the limiting rod, the sliding sleeve being fixedly connected to the top surface of the mounting plate.

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

6. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 1, characterized in that: A cushioning airbag is sleeved on the outer periphery of the push rod, and the cushioning airbag is located between the cushion block and the outer ring of the solid material ring, and an air leakage hole is opened on the cushioning airbag, and an anti-skid pad is fixed on one end of the top cover located on the inner side of the solid material ring.

7. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 4, characterized in that: The transmission assembly includes a transmission shaft rotatably connected to the outer wall of a fixed plate close to a mounting ring, an adjusting rod fixed to one end of the transmission shaft, a fixed gear sleeved on the outer periphery of a screw rod, and a transmission rack slidably connected to the fixed plate through a second sliding member, the transmission rack meshing with the fixed gear, a linkage gear sleeved on the outer periphery of the transmission shaft, a linkage rack meshing with the linkage gear fixed on one long side of the transmission rack, the second sliding member has the same structure as the first sliding member, and a second sliding groove for installing the second sliding member is installed on the fixed plate.

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

9. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 1, characterized in that: A baffle is fixed to the side of the mounting ring close to the fixed plate, a fixing sleeve is fixed on the inner wall of the baffle close to the fixed plate, a movable sleeve in the fixed sleeve is provided with a movable rod, and 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 fixing sleeve, and one end of the locking bolt abuts against the outer periphery of the movable rod.

10. A test device for simulating the impact of a TBM cutter in a jointed rock mass according to claim 9, characterized in that: A hollow fixing ring is fixed on one side of the baffle plate close to the fixing plate, a fixing tube is installed on the fixing plate, one end of the fixing tube is connected with the fixing airbag through a hose, the other end of the fixing tube is connected with the inside of the fixing ring through a connecting tube, a valve is installed on the fixing tube, one end of the valve stem of the valve is fixedly connected with the transmission shaft, a plurality of jet holes connected with the inside of the fixing ring are provided on one side of the baffle plate away from the fixing plate, and the jet holes are located on the inner side of the solid material ring.

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