Grouting reinforcement device for broken surrounding rock roadway

Abstract

The invention belongs to the technical field of roadway surrounding rock reinforcement, and discloses a broken surrounding rock roadway grouting reinforcement device which comprises an anchor rod body and a roadway rock mass, a supporting assembly is arranged at one end of the anchor rod body, and a sealing assembly is slidably connected to the end, away from the supporting assembly, of the anchor rod body; the anchor rod comprises an anchor rod body, first sliding grooves are annularly formed in the outer portion of the anchor rod body, a conveying assembly is movably connected into the anchor rod body, and a pressure bearing assembly is arranged in the anchor rod body. After slurry is injected into the top of the first baffle, the first baffle is extruded by the slurry to move downwards, so that the first baffle is attached to the second baffle; through cooperation of structures such as the conveying assembly and the second slurry discharging opening, the grouting efficiency can be improved conveniently, through arrangement of the second slurry discharging opening, the number of slurry discharging channels can be increased, and the efficiency of injecting slurry into anchoring holes is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel surrounding rock reinforcement, in particular to a broken surrounding rock tunnel grouting reinforcement device. Background Art

[0002] In order to mine coal, all kinds of passages and chambers dug from the ground to the underground are collectively called tunnels, which are used for coal transportation, ventilation, drainage, pedestrians, etc. When constructing tunnels, the tunnels need to be supported, generally using support techniques such as anchor rods and cables, anchor mesh shotcrete, lining, and grouting reinforcement.

[0003] China Patent Network Application No.: CN201711343832.3 provides a controllable grouting reinforcement device and construction method for broken surrounding rock tunnels, the scheme includes a grouting anchor, a fixed grouting plug, a movable grouting plug, and an automatic extension type hole plugging device; the grouting anchor is provided with a local anchoring hole on the middle and front side walls, the grouting anchor surface is provided with a thread, and a fixed grouting plug, a movable grouting plug, and an automatic extension type hole plugging device are provided on the outer surface of the local anchoring hole in the middle of the grouting anchor, the movable grouting plug is connected to the automatic extension type hole plugging device, and the movable grouting plug is arranged opposite to the fixed grouting plug; the automatic extension type hole plugging device can preset the pressure, and can automatically extend along the axis of the anchor when the grouting pressure reaches the preset pressure.

[0004] When the scheme is implemented, after the slurry is injected into the rock, it will first flow downward and then gradually fill the anchor holes. When the top of the tunnel is reinforced, the slurry first flows to the bottom, so that the slurry seals the bottom of the anchor hole, and the air inside the anchor hole will gradually be squeezed into the rock crack by the slurry. The air will squeeze the fragments to increase the gap, destroy the rock structure, and affect the reinforcement effect of the tunnel. Therefore, a grouting reinforcement device for a broken surrounding rock tunnel is proposed. Summary of the invention

[0005] In order to solve the problem that air cannot be discharged during grouting for reinforcement of the tunnel top proposed in the above background technology, the present invention provides a grouting reinforcement device for a broken surrounding rock tunnel.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grouting reinforcement device for a broken surrounding rock tunnel, comprising an anchor body and a tunnel rock mass, wherein a support assembly is arranged at one end of the anchor body, a sealing assembly is slidably connected to one end of the anchor body away from the support assembly, a first slide groove is annularly arranged on the outside of the anchor body, a conveying assembly is movably connected to the inside of the anchor body, a pressure-bearing assembly is arranged on the inside of the anchor body, and two sets of second slurry discharge ports are linearly arranged on the outside of the anchor body;

[0007] The sealing assembly includes a first baffle plate and a second baffle plate which are slidably connected to the inside of the first slide groove, a rubber ring is fixedly connected between the first baffle plate and the second baffle plate, and a clamping block is fixedly connected to one end of the first baffle plate close to the second baffle plate.

[0008] Preferably, the support assembly comprises a support pad and a fixing nut threadedly connected to the anchor body, a blocking block is provided on one side of the support pad close to the tunnel rock mass, and a slot is provided in the middle of the blocking block.

[0009] The support pad is in conflict with the inner wall of the tunnel rock body, and the blocking block is in conflict with the second baffle plate that slides along the first slide groove to the bottom of the anchor body. At the same time, the blocking block is inserted into the slot, and the outer diameter of the blocking block is smaller than the diameter of the anchor hole opened in the tunnel rock body.

[0010] The first baffle is slidably connected to the inside of the tunnel rock mass, and the diameters of the first baffle and the second baffle are both smaller than the diameter of the anchor hole inside the tunnel rock mass. The rubber ring expands outward after being squeezed and deformed by the first baffle, and contacts the inner wall of the anchor hole. The block passes through the second baffle and extends to the side of the second baffle away from the first baffle.

[0011] The conveying assembly includes a sealing blocking frame, a first pulp discharge port is opened on the side of the sealing blocking frame, a spiral fan blade is rotatably connected inside the sealing blocking frame, a pair of locking blocks are abutted against one end of the sealing blocking frame close to the supporting assembly, a traction link is slidably connected to one end of the sealing blocking frame close to the supporting assembly, and an elastic traction rope is fixedly connected to the middle of the traction link.

[0012] The sealing blocking frame is slidably connected to the inside of the second slide groove, the first pulp discharge port is consistent with the second pulp discharge port in specifications and corresponds to the position of the second pulp discharge port, the locking block is clamped in the inside of the second slide groove, and the two sides of the traction link are respectively hinged to the locking blocks.

[0013] The pressure-bearing component includes a sliding frame movably connected to the anchor body and a limiting frame fixedly connected to the anchor body. Extrusion protrusion blocks are linearly distributed on both sides of the sliding frame. An arc-shaped inclined surface is provided at one end of the sliding frame close to the supporting component. A pair of rigid traction ropes are fixedly connected to the middle of the sliding frame.

[0014] The sliding frame is slidably connected inside the limiting frame, and one end of the sliding frame close to the sealing blocking frame is fixedly connected to the elastic traction rope. The limiting frame is linearly distributed inside the anchor rod body and is located between the conveying assembly and the supporting assembly. The extrusion protrusion block and the arc-shaped inclined surface both conflict with the limiting frame.

[0015] The rigid traction rope passes through the middle of the limit frame located near the support assembly, and bypasses the limit frame to extend to the first baffle. The rigid traction rope extends from one end of the anchor rod body near the sealing assembly. The rigid traction rope passes through the first baffle and is fixedly connected to the second baffle.

[0016] Preferably, when the sliding frame is pulled by the rigid traction rope, the extrusion protrusion block and the limit frame interfere with each other to offset part of the pulling force exerted on the sliding frame. When the first baffle moves toward the supporting pad and crosses the second pulp discharge port, the sliding frame pulls the elastic traction rope, causing the elastic traction rope to pull the traction link to slide, causing the traction link to pull the locking block toward the middle to release the lock of the sealing blocking frame, and then pull the sealing blocking frame to slide along the second slide groove toward the side of the supporting pad, so that the second pulp discharge port is connected to the first pulp discharge port.

[0017] Beneficial Effects

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention facilitates the discharge of air during grouting by arranging the cooperation of structures such as the support assembly and the sealing assembly. When slurry is injected into the top of the first baffle, the first baffle is squeezed and moved downward by the slurry, so that the first baffle and the second baffle are fitted, and the rubber ring is squeezed outward to contact the inner wall of the anchor hole, so as to seal the space between the first baffle and the anchor hole, so that the injected slurry gradually moves downward from the top of the anchor hole to discharge the air inside the anchor hole, thereby improving the reinforcement effect of the tunnel;

[0020] The present invention facilitates improving the grouting efficiency by arranging the cooperation of the conveying assembly and the second row of slurry ports and other structures. By arranging the second row of slurry ports, the channel for slurry discharge can be increased, and the efficiency of slurry injection into the anchor hole can be accelerated. At the same time, by arranging the conveying assembly, the second row of slurry ports can be sealed before the first baffle plate passes over the second row of slurry ports, so that when the slurry is injected into the anchor hole, the air is discharged synchronously, thereby improving the anchoring effect.

[0021] The present invention cooperates with structures such as a pressure-bearing component and a second baffle plate, thereby facilitating the application of a certain pulling force to the second baffle plate, and partially offsetting the pulling force exerted on the sliding frame by the contact between the extrusion protrusion block and the limit frame. The rigid traction rope provides a certain pulling force to the second baffle plate through friction and extrusion of the extrusion protrusion block and the limit frame, so that the slurry inside the space between the first baffle plate and the anchor hole is squeezed into the gap inside the rock mass by the pressure of the slurry transportation, thereby ensuring the reinforcement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the state of the anchor rod of the present invention being anchored into the rock mass;

[0023] Figure 2 It is an overall schematic diagram of the anchor rod of the present invention;

[0024] Figure 3 It is an enlarged cross-sectional view of the sealing component of the present invention;

[0025] Figure 4 It is an overall schematic diagram of the conveying assembly of the present invention;

[0026] Figure 5 It is an enlarged cross-sectional view of the conveying component of the present invention;

[0027] Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle;

[0028] Figure 7 It is a cross-sectional schematic diagram of the pressure-bearing component of the present invention;

[0029] Figure 8 for Figure 7 Enlarged schematic diagram of point B in the middle.

[0030] In the figure: 1. anchor body; 2. tunnel rock mass; 3. support assembly; 31. support pad; 32. fixing nut; 33. blocking block; 34. slot; 4. sealing assembly; 41. first baffle; 42. second baffle; 43. rubber ring; 44. blocking block; 5. first slide; 6. conveying assembly; 61. sealing blocking frame; 62. first row of slurry outlet; 63. spiral fan blade; 64. locking block; 65. traction link; 66. elastic traction rope; 7. pressure-bearing assembly; 71. sliding frame; 72. limit frame; 73. extrusion protrusion block; 74. arc slope; 75. rigid traction rope; 8. second row of slurry outlet; 9. second slide. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 8 As shown, the present invention provides a broken surrounding rock tunnel grouting reinforcement device, including an anchor body 1 and a tunnel rock mass 2, a support assembly 3 is arranged at one end of the anchor body 1, a sealing assembly 4 is slidably connected to the end of the anchor body 1 away from the support assembly 3, a first slide groove 5 is annularly arranged on the outside of the anchor body 1, a conveying assembly 6 is movably connected inside the anchor body 1, a pressure bearing assembly 7 is arranged inside the anchor body 1, and two groups of second slurry discharge ports 8 are linearly arranged on the outside of the anchor body 1;

[0033] The sealing assembly 4 includes a first baffle 41 and a second baffle 42 slidably connected to the inside of the first slide groove 5 , a rubber ring 43 is fixedly connected between the first baffle 41 and the second baffle 42 , and a clamping block 44 is fixedly connected to one end of the first baffle 41 close to the second baffle 42 .

[0034] The above scheme is adopted: high-pressure slurry is transported into the anchor body 1 through an external conveying device. After the slurry fills the interior of the anchor body 1 and is injected into the top of the first baffle 41, the slurry will press down the first baffle 41. At this time, the second baffle 42 is pulled by the rigid traction rope 75 to remain in place, so that the first baffle 41 is squeezed and fits the second baffle 42, and the rubber ring 43 is squeezed outward to contact the inner wall of the anchor hole, so as to seal the space between the first baffle 41 and the anchor hole. Then, the pressure on the slurry on the top of the first baffle 41 increases, so that the slurry penetrates into the gap inside the tunnel rock mass 2, so that the slurry can cooperate with the anchor after solidification to stably support the bracket inside the tunnel.

[0035] like Figure 2 and Figure 8 As shown, the support assembly 3 includes a support pad 31 and a fixing nut 32 which are threadedly connected to the anchor body 1. A blocking block 33 is provided on the side of the support pad 31 close to the tunnel rock mass 2. A slot 34 is provided in the middle of the blocking block 33. The support pad 31 and the fixing nut 32 are both threadedly connected to the anchor body 1. The support pad 31 is in conflict with the inner wall of the tunnel rock mass 2. The blocking block 33 is in conflict with the second baffle 42 which slides along the first slide groove 5 to the bottom of the anchor body 1. At the same time, the block 44 is inserted into the slot 34. The outer diameter value of the blocking block 33 is smaller than the diameter value of the anchor hole opened in the tunnel rock mass 2.

[0036] The above scheme is adopted: by setting the support assembly 3, the anchor body 1 is fixed and supported by the support pad 31 and the fixing nut 32, and the support pad 31 is in contact with the tunnel rock mass 2 to keep the anchor body 1 centered and stable when inside the anchor hole of the tunnel rock mass 2, and by setting the blocking block 33 and the slot 34, the second baffle 42 is supported and blocked by the blocking block 33, and at the same time the slot 34 is fixed by the blocking block 44, and the outer diameter value of the blocking block 33 is smaller than the diameter value of the anchor hole opened in the tunnel rock mass 2, so that the air inside the anchor hole can be discharged from the support pad 31.

[0037] like Figure 2 and Figure 3 As shown, the first baffle plate 41 is slidably connected to the inside of the tunnel rock mass 2, and the diameters of the first baffle plate 41 and the second baffle plate 42 are both smaller than the diameter of the anchor hole inside the tunnel rock mass 2. The rubber ring 43 expands outward after being squeezed and deformed by the first baffle plate 41, and contacts the inner wall of the anchor hole. The block 44 passes through the second baffle plate 42 and extends to the side of the second baffle plate 42 away from the first baffle plate 41.

[0038] The above scheme is adopted: by setting up the sealing component 4, the first baffle plate 41 and the second baffle plate 42 jointly block the slurry, so that the slurry is retained in the space between the first baffle plate 41 and the anchor hole. After the slurry is injected on the top of the first baffle plate 41, the first baffle plate 41 will be squeezed downward by the slurry. At this time, the second baffle plate 42 is pulled by the rigid traction rope 75 to remain in place, so that the first baffle plate 41 and the second baffle plate 42 are fitted, and then the rubber ring 43 is squeezed outward, so that the rubber ring 43 and the inner wall of the anchor hole are in contact, and the space between the first baffle plate 41 and the anchor hole is sealed. Then, when the slurry is injected, no air will remain on the top of the slurry, and the slurry can directly penetrate into the gap inside the tunnel rock mass 2.

[0039] like Figure 4 , Figure 5 and Figure 6 As shown, the conveying assembly 6 includes a sealing blocking frame 61, a first pulp discharge port 62 is opened on the side of the sealing blocking frame 61, a spiral fan blade 63 is rotatably connected inside the sealing blocking frame 61, one end of the sealing blocking frame 61 close to the supporting assembly 3 abuts against a pair of locking blocks 64, one end of the sealing blocking frame 61 close to the supporting assembly 3 is slidably connected to a traction link 65, and an elastic traction rope 66 is fixedly connected to the middle part of the traction link 65, the sealing blocking frame 61 is slidably connected to the inside of the second slide groove 9, the first pulp discharge port 62 is consistent with the second pulp discharge port 8 in specifications and corresponds to the position of the second pulp discharge port 8, the locking block 64 is clamped in the inside of the second slide groove 9, and the two sides of the traction link 65 are respectively hinged to the locking block 64.

[0040] The above scheme is adopted: by setting the conveying component 6, the sealing blocking frame 61 slides inside the second slide groove 9 to seal the second pulp outlet 8. The setting of the first pulp outlet 62 can be connected with the second pulp outlet 8 after the sealing blocking frame 61 slides, so that the slurry is discharged from the first pulp outlet 62 and the second pulp outlet 8. By setting the spiral blade 63, after the first pulp outlet 62 and the second pulp outlet 8 are connected, the spiral blade 63 can rotate under the impact of the slurry to push the slurry to be discharged from the second pulp outlet 8 faster. The design of the locking block 64, the traction link 65 and the elastic traction rope 66 can release the lock of the sealing blocking frame 61, so that the sealing blocking frame 61 slides and releases the seal of the second pulp outlet 8. The locking block 64 is clamped in the second slide groove 9 to keep the sealing blocking frame 61 fixed and unable to slide. The elastic traction rope 66 can pull the middle part of the traction link 65 to move, and then the traction link 65 will pull the locking block 64 to move toward the middle.

[0041] This releases the sliding restriction of the sealing stop frame 61.

[0042] like Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the pressure-bearing component 7 includes a sliding frame 71 movably connected to the inside of the anchor body 1 and a limiting frame 72 fixedly connected to the anchor body 1. Extrusion protrusions 73 are linearly distributed on both sides of the sliding frame 71. An arc-shaped inclined surface 74 is provided at one end of the sliding frame 71 close to the support component 3. A pair of rigid traction ropes 75 are fixedly connected to the middle of the sliding frame 71. The sliding frame 71 is slidably connected to the inside of the limiting frame 72. One end of the sliding frame 71 close to the sealing blocking frame 61 is fixedly connected to the elastic traction rope 66. The limit frame 72 is linearly distributed inside the anchor body 1 and is located between the conveying assembly 6 and the support assembly 3. The extrusion protrusion block 73 and the arc-shaped inclined surface 74 both conflict with the limit frame 72. The rigid traction rope 75 passes through the middle of the limit frame 72 located near the support assembly 3, and extends to the first baffle 41 by bypassing the limit frame 72. The rigid traction rope 75 extends from one end of the anchor body 1 close to the sealing assembly 4, and the rigid traction rope 75 passes through the first baffle 41 and is fixedly connected to the second baffle 42.

[0043] The above scheme is adopted: by setting the pressure-bearing component 7, the sliding frame 71 slides inside the limiting frame 72, and when the sliding frame 71 is pulled, the extrusion protrusion block 73 contacts the limiting frame 72 to offset part of the pulling force on the sliding frame 71, and the arc-shaped inclined surface 74 is set, so that when the sliding frame 71 enters the limiting frame 72, the end of the sliding frame 71 will not contact the limiting frame 72, causing the limiting frame 72 to be stuck, and by setting a rigid traction rope 75, the rigid traction rope 75 is turned around from the inside of the limiting frame 72 and the end of the anchor body 1 into an S shape, which can be After the space between the first baffle plate 41 and the anchor hole is filled with slurry, the rigid traction rope 75 provides a certain pulling force to the second baffle plate 42 through friction and extrusion of the protrusion block 73 and the limit frame 72, so that the slurry in the space between the first baffle plate 41 and the anchor hole is squeezed into the gap inside the rock mass by the pressure of the slurry transportation. When the pressure of the transported slurry reaches a certain level, it will push the second baffle plate 42 to pull the rigid traction rope 75 to move, allowing the rigid traction rope 75 to slide inside the limit frame 72, thereby keeping the slurry stably penetrating into the rock mass gap.

[0044] like Figures 2 to 8 As shown, when the sliding frame 71 is pulled by the rigid traction rope 75, the extrusion protrusion block 73 and the limit frame 72 contact each other to offset part of the pulling force exerted on the sliding frame 71. When the first baffle plate 41 moves toward the support pad 31 and crosses the second pulp outlet 8, the sliding frame 71 pulls the elastic traction rope 66, causing the elastic traction rope 66 to pull the traction link 65 to slide, causing the traction link 65 to pull the locking block 64 toward the middle to release the lock of the sealing blocking frame 61, and then pull the sealing blocking frame 61 to slide along the second slide groove 9 toward the side of the support pad 31, so that the second pulp outlet 8 and the first pulp outlet 62 are connected.

[0045] The above scheme is adopted: when the sliding frame 71 is pulled by the rigid traction rope 75, the extrusion protrusion block 73 contacts the limit frame 72, so that the extrusion protrusion block 73 is squeezed, thereby offsetting part of the pulling force applied to the sliding frame 71. When the first baffle plate 41 is squeezed and moved to cross the second row of slurry opening 8 by the slurry, the sliding frame 71 has pulled the elastic traction rope 66 to a taut state, so that the elastic traction rope 66 pulls the traction link 65 to slide. Since the traction link 65 is rotatably connected with the locking block 64, and the locking block 64 is squeezed and contacted inside the sealing blocking frame 61, the traction link 65 will first pull the locking block 64 to close in the middle, releasing the lock of the sealing blocking frame 61, and then the traction link 65 pulls the sealing blocking frame 61 to slide along the second slide groove 9 toward the side of the support pad 31, so that the second row of slurry opening 8 and the first row of slurry opening 62 are connected, so that the slurry can be discharged from the second row of slurry opening 8, thereby accelerating the efficiency of slurry injection.

[0046] The working principle and use process of the present invention are as follows: during operation, after the anchor body 1 is installed inside the anchor hole at the top of the tunnel rock mass 2, high-pressure slurry is transported into the anchor body 1 through an external conveying device. After the slurry fills the inside of the anchor body 1 and is injected into the top of the first baffle 41, the slurry will press down the first baffle 41. At this time, the second baffle 42 is pulled by the rigid traction rope 75 to remain in place, so that the first baffle 41 is squeezed and fits with the second baffle 42, and the rubber ring 43 is squeezed outward to contact the inner wall of the anchor hole, so as to seal the space between the first baffle 41 and the anchor hole, and then the pressure on the slurry on the top of the first baffle 41 increases, so that the slurry penetrates into the gap inside the tunnel rock mass 2;

[0047] The slurry pressure at the top of the first baffle 41 continues to increase, so that the second baffle 42 is pushed downward, and at the same time, the rigid traction rope 75 pulls the sliding frame 71 to slide downward. When the first baffle 41 passes over the second row of slurry ports 8, the sliding frame 71 pulls the traction link 65 to slide through the elastic traction rope 66, so that the traction link 65 pulls the locking block 64 to the middle to retract, release the lock of the sealing blocking frame 61, and then the traction link 65 pulls the sealing blocking frame 61 to slide along the second slide groove 9, so that the second row of slurry ports 8 and the first row of slurry ports 62 are connected, so that the slurry can be discharged from the second row of slurry ports 8, thereby speeding up the efficiency of slurry injection. When the second baffle 42 is squeezed and moved downward, the air inside the anchor hole is squeezed out of the anchor hole until the second baffle 42 conflicts with the blocking block 33, and the card block 44 is engaged into the card slot 34, thereby completing the grouting.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grouting reinforcement device for a broken surrounding rock tunnel, comprising an anchor body (1) and a tunnel rock mass (2), characterized in that: A support assembly (3) is provided at one end of the anchor rod body (1); a sealing assembly (4) is slidably connected to the end of the anchor rod body (1) away from the support assembly (3); a first slide groove (5) is provided in an annular manner on the outside of the anchor rod body (1); a conveying assembly (6) is movably connected to the inside of the anchor rod body (1); a pressure bearing assembly (7) is provided in the inside of the anchor rod body (1); and two groups of second slurry discharge ports (8) are provided in a linear manner on the outside of the anchor rod body (1); The sealing assembly (4) comprises a first baffle (41) and a second baffle (42) which are slidably connected inside the first slide groove (5); a rubber ring (43) is fixedly connected between the first baffle (41) and the second baffle (42); and a clamping block (44) is fixedly connected to one end of the first baffle (41) close to the second baffle (42).

2. The grouting reinforcement device for broken surrounding rock tunnel according to claim 1 is characterized in that: The support assembly (3) comprises a support pad (31) and a fixing nut (32) threadedly connected to the anchor body (1); a blocking block (33) is provided on one side of the support pad (31) close to the tunnel rock mass (2); and a slot (34) is provided in the middle of the blocking block (33).

3. The grouting reinforcement device for broken surrounding rock tunnel according to claim 2 is characterized in that: The support pad (31) contacts the inner wall of the tunnel rock mass (2), and the blocking block (33) contacts the second baffle (42) that slides along the first slide groove (5) to the bottom of the anchor rod body (1). At the same time, the block (44) is inserted into the inside of the slot (34), and the outer diameter of the blocking block (33) is smaller than the diameter of the anchor hole opened in the tunnel rock mass (2).

4. The grouting reinforcement device for broken surrounding rock tunnel according to claim 1 is characterized in that: The first baffle (41) is slidably connected to the inside of the tunnel rock mass (2); the diameters of the first baffle (41) and the second baffle (42) are both smaller than the diameter of the anchor hole inside the tunnel rock mass (2); the rubber ring (43) expands outward after being squeezed and deformed by the first baffle (41) and contacts the inner wall of the anchor hole; the clamping block (44) penetrates the second baffle (42) and extends to the side of the second baffle (42) away from the first baffle (41).

5. The grouting reinforcement device for broken surrounding rock tunnel according to claim 1 is characterized in that: The conveying assembly (6) comprises a sealing blocking frame (61), a first pulp discharge port (62) is provided on a side of the sealing blocking frame (61), a spiral blade (63) is rotatably connected inside the sealing blocking frame (61), one end of the sealing blocking frame (61) close to the supporting assembly (3) abuts against a pair of locking blocks (64), one end of the sealing blocking frame (61) close to the supporting assembly (3) is slidably connected to a traction link (65), and an elastic traction rope (66) is fixedly connected to the middle of the traction link (65).

6. The grouting reinforcement device for broken surrounding rock tunnel according to claim 5 is characterized in that: The sealing blocking frame (61) is slidably connected to the inside of the second slide groove (9); the first pulp discharge port (62) has the same specifications as the second pulp discharge port (8) and corresponds to the position of the second pulp discharge port (8); the locking block (64) is clamped in the inside of the second slide groove (9); and the two sides of the traction connecting rod (65) are respectively hinged to the locking block (64).

7. The grouting reinforcement device for broken surrounding rock tunnel according to claim 1 is characterized in that: The pressure-bearing component (7) comprises a sliding frame (71) movably connected to the inside of the anchor rod body (1) and a limiting frame (72) fixedly connected to one end of the anchor rod body (1) close to the support pad (31); extrusion protrusions (73) are linearly distributed on both sides of the sliding frame (71); an arc-shaped inclined surface (74) is provided at one end of the sliding frame (71) close to the support component (3); and a pair of rigid traction ropes (75) are fixedly connected to the middle of the sliding frame (71).

8. The grouting reinforcement device for broken surrounding rock tunnel according to claim 7 is characterized in that: The sliding frame (71) is slidably connected inside the limiting frame (72); one end of the sliding frame (71) close to the sealing blocking frame (61) is fixedly connected to the elastic traction rope (66); the limiting frame (72) is linearly distributed inside the anchor rod body (1) and is located between the conveying component (6) and the supporting component (3); the extrusion protrusion block (73) and the arc-shaped inclined surface (74) are both in conflict with the limiting frame (72).

9. The broken surrounding rock tunnel grouting reinforcement device according to claim 7 is characterized in that: The rigid traction rope (75) passes through the middle of a limit frame (72) located near the support assembly (3), and bypasses the limit frame (72) to extend toward the first baffle (41). The rigid traction rope (75) extends from one end of the anchor rod body (1) near the sealing assembly (4). The rigid traction rope (75) passes through the first baffle (41) and is fixedly connected to the second baffle (42).

10. The grouting reinforcement device for broken surrounding rock tunnel according to claim 7, characterized in that: When the sliding frame (71) is pulled by the rigid traction rope (75), the extrusion protrusion block (73) and the limit frame (72) contact each other to offset part of the pulling force on the sliding frame (71). When the first baffle plate (41) moves toward the support pad (31) and crosses the second pulp discharge port (8), the sliding frame (71) pulls the elastic traction rope (66), causing the elastic traction rope (66) to pull the traction link (65) to slide, so that the traction link (65) pulls the locking block (64) to retract toward the middle to release the lock of the sealing blocking frame (61), and then pulls the sealing blocking frame (61) to slide along the second slide groove (9) toward one side of the support pad (31), so that the second pulp discharge port (8) and the first pulp discharge port (62) are connected.

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