Grouting reinforcement device for coal mine tunnel

Abstract

The invention discloses a coal mine tunnel grouting reinforcement device, and relates to the technical field of tunnel grouting reinforcement, the coal mine tunnel grouting reinforcement device comprises grouting equipment, and the upper and lower sides of the grouting equipment are symmetrically fixed with pushing cylinder bodies; the adjusting cylinder bodies are symmetrically hinged to the upper side and the lower side of the grouting equipment; the number of the connecting plates is two, one ends of the connecting plates are hinged to the two pushing cylinder bodies correspondingly, and the other ends of the connecting plates are hinged to the adjusting cylinder bodies correspondingly; the telescopic equipment is fixed to the side, close to the connecting plate, of the grouting equipment; the supporting assembly is fixed to the output end of the telescopic equipment; and the grouting assembly is arranged in the supporting assembly in a sliding mode, penetrates through the telescopic equipment and drives stretching and grouting operation through the grouting equipment, the situation that primary grouting is extruded unevenly during secondary grouting can be avoided, gas in grout can be discharged easily, and the situation that the reinforcing effect is affected due to the fact that holes appear is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel grouting reinforcement, in particular to a coal mine tunnel grouting reinforcement device. Background Art

[0002] After the excavation of coal mine tunnels is completed, in order to effectively prevent and curb the occurrence of major accidents in coal mines, the tunnels need to be reinforced by grouting. Grouting is a method of injecting certain solidifying slurries into cracks or pores in the rock foundation to improve its physical and mechanical properties.

[0003] The existing grouting reinforcement adopts the method of multiple grouting, but after the first grouting, the slurry forms a reinforcement layer. The secondary grouting will squeeze the primary slurry, making it inconvenient to uniformly pressurize the primary slurry. The slurry of the secondary grouting cannot be evenly distributed in the primary slurry, resulting in unstable reinforcement. In addition, the secondary grouting is prone to fracturing the primary slurry, resulting in stratification, which affects the reinforcement effect.

[0004] In view of the above problems, the present invention provides a coal mine tunnel grouting reinforcement device to solve the above problems. Summary of the Invention

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a coal mine tunnel grouting reinforcement device, comprising: a grouting device, on the upper and lower sides of which push cylinders are symmetrically fixed; an adjusting cylinder, symmetrically hinged on the upper and lower sides of the grouting device; a connecting plate, which is configured into two, one end of which is hinged on the two push cylinders, and the other end is hinged on the adjusting cylinders; a telescopic device, which is fixed on the side of the grouting equipment close to the connecting plate; a support assembly, which is fixed at the output end of the telescopic device; a grouting assembly, which is slidably arranged in the support assembly, passes through the telescopic device and drives the telescopic and grouting operations through the grouting equipment.

[0006] Preferably, the support assembly includes: a sliding ring, which is evenly hinged with multiple hinge assemblies on the circumference of a side away from the telescopic device; a support plate, which is configured in multiples and is respectively hinged on one end of the multiple hinge assemblies away from the sliding ring; a sliding cylinder, which is slidably arranged on the inner side of the multiple support plates; and a pressing ring, which is fixed on the side of the sliding cylinder away from the sliding ring.

[0007] Preferably, the hinge assembly includes: a hinged part, one end of which is hinged to the sliding ring and is sleeved with a torsion spring 1; a connecting rod, which is hinged to the other end of the hinged part and is sleeved with a torsion spring 2 at the hinged position.

[0008] Preferably, when the torsion spring 1 and the torsion spring 2 are in an initial state, the connecting rod has a tendency to move away from the sliding ring.

[0009] Preferably, a fixing seat is fixed at the corresponding positions of the outer wall of the sliding cylinder and the support plate, and a guide block is fixed on the fixing seat. The guide block is arranged obliquely, and a pressing spring is arranged between the guide block and the support plate. The expansion and contraction direction of the pressing spring is along the inclination direction of the guide block, and the expansion and contraction pressing spring pushes the support plate to have a tendency to approach the sliding ring.

[0010] Preferably, the grouting assembly includes: a grouting pipe, which is connected to the grouting equipment; a conversion pipe, which is rotatably arranged in the grouting pipe and driven by an external rotating motor; an expansion sleeve, which is sleeved on the outer wall of the grouting pipe; a grouting port, which is opened at the bottom of the grouting pipe and has a control valve fixed at its outlet.

[0011] Preferably, a plurality of slurry outlet holes are opened on the circumference of the grouting pipe and the conversion pipe, and the plurality of slurry outlet holes on the grouting pipe and the conversion pipe correspond one to one.

[0012] Preferably, when the conversion tube is in the initial state, the multiple slurry outlet holes on the conversion tube and the multiple slurry outlet holes on the grouting tube are arranged alternately.

[0013] Compared with the prior art, the present invention provides a coal mine tunnel grouting reinforcement device with the following beneficial effects:

[0014] The present invention uses symmetrical layout and multi-stage adjustment to enable the device to flexibly adapt to irregular changes in the cross-sectional shape of the tunnel and to adapt to drilling holes at different angles, completing grouting reinforcement operations and ensuring the stability and balance of the overall structure. The support assembly can ensure that the grouting assembly is located at the axis of the drilling hole during the first grouting, thereby avoiding uneven squeezing of the first grouting during the second grouting, and the first grouting pressure is less than the second grouting pressure, thereby evenly squeezing the slurry of the first grouting into the rock cracks to complete grouting reinforcement, and during the first grouting, the slurry is gradually injected, which pushes the support assembly to shrink slightly, thereby facilitating the sliding of the support assembly, and the support assembly presses the slurry, which helps to discharge gas in the slurry and avoid the formation of pores that affect the reinforcement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a coal mine tunnel grouting reinforcement device;

[0016] Figure 2 This is a schematic diagram of the overall structure of a support assembly in a coal mine tunnel grouting reinforcement device;

[0017] Figure 3 This is a schematic diagram of the partial structure of a support assembly in a coal mine tunnel grouting reinforcement device;

[0018] Figure 4This is a schematic diagram of the structure of a grouting component in a coal mine tunnel grouting reinforcement device;

[0019] Figure 5 This is a schematic diagram of the grouting state of a coal mine tunnel grouting reinforcement device;

[0020] In the figure: 1. Grouting equipment; 2. Push cylinder; 3. Adjusting cylinder; 4. Connecting plate; 5. Telescopic equipment; 6. Support assembly; 7. Grouting assembly; 61. Sliding ring; 62. Hinge assembly; 63. Support plate; 64. Sliding cylinder; 65. Pressing ring; 621. Hinge; 622. Connecting rod; 641. Fixed seat; 642. Guide block; 71. Grouting pipe; 72. Conversion pipe; 73. Slurry outlet; 74. Expansion casing; 75. Grouting port; 76. Control valve. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 5 The present invention provides a technical solution: a coal mine tunnel grouting reinforcement device, comprising: a grouting device 1, on the upper and lower sides of which are symmetrically fixed with pushing cylinders 2; an adjusting cylinder 3, symmetrically hinged on the upper and lower sides of the grouting device 1; a connecting plate 4, which is configured as two, one end of which is hinged on the two pushing cylinders 2, and the other end is hinged on the adjusting cylinder 3; a telescopic device 5, which is fixed on the side of the grouting equipment 1 close to the connecting plate 4; a support assembly 6, which is fixed at the output end of the telescopic device 5; a grouting assembly 7, which is slidably arranged in the support assembly 6, and passes through the telescopic device 5, and drives the telescopic and grouting operations through the grouting equipment 1.

[0022] Before grouting the drill hole, the two connecting plates 4 are first fixed on the inner wall of the tunnel, and then the angle of the grouting equipment 1 is adjusted by pushing the cylinder body 2 and adjusting the extension and contraction of the cylinder body 3 so that its angle is consistent with the drilling angle, which facilitates the placement of the grouting component 7.

[0023] In addition, the two connecting plates 4 can be fixed to the inner wall of the tunnel through waist-shaped holes and expansion nails. When fixing, the waist-shaped holes are first limited by the expansion nails so that the entire device can slide and adjust on the inner wall of the tunnel. When the position adjustment is completed, the connecting plates 4 are fixed to the inner wall of the tunnel through the expansion nails.

[0024] In this embodiment, the support assembly 6 includes: a sliding ring 61, which has multiple hinge assemblies 62 evenly hinged on the circumference of the side away from the telescopic device 5; a support plate 63, which is configured in multiples and is respectively hinged on one end of the multiple hinge assemblies 62 away from the sliding ring 61; a sliding cylinder 64, which is slidably arranged on the inner side of the multiple support plates 63; and a pressing ring 65, which is fixed on the side of the sliding cylinder 64 away from the sliding ring 61.

[0025] As a preferred embodiment, the hinge assembly 62 includes: a hinge 621, one end of which is hinged to the sliding ring 61 and is sleeved with a torsion spring 1; a connecting rod 622, which is hinged to the other end of the hinge 621 and has a torsion spring 2 sleeved at the hinge position.

[0026] As a preferred embodiment, when the torsion spring 1 and the torsion spring 2 are in the initial state, the connecting rod 622 tends to move away from the sliding ring 61 .

[0027] That is, the torsion spring 1 and the torsion spring 2 can enable the support plate 63 to drive the sliding cylinder 64 away from the sliding ring 61, so that the pressing ring 65 can be pressed by the slurry, thereby pushing the sliding cylinder 64 to slide.

[0028] As a preferred embodiment, a fixing seat 641 is fixed at the corresponding positions of the outer wall of the sliding cylinder 64 and the support plate 63, and a guide block 642 is fixed on the fixing seat 641. The guide block 642 is arranged at an angle, and a pressing spring is arranged between the guide block 642 and the support plate 63. The expansion and contraction direction of the pressing spring is along the inclination direction of the guide block 642, and the expansion and contraction pressing spring pushes the support plate 63 to have a tendency to approach the sliding ring 61.

[0029] It should be noted that the elastic force of the pressing spring is smaller than the combined elastic force of the torsion spring 1 and the torsion spring 2. That is to say, when the slurry pushes the pressing ring 65 to make the sliding cylinder 64 slide, the pressing spring is compressed, and the support plate 63 slides along the inclined guide block 642, so that the support plate 63 is far away from the inner wall of the borehole, which facilitates the overall sliding of the support assembly 6. Then the telescopic device 5 pulls the sliding ring 61 to slide, and the sliding speed is greater than the speed at which the slurry pushes the sliding cylinder 64, so that the support plate 63 is reset along the guide block 642, and the inner wall of the borehole is supported again, thereby gradually completing the support of the grouting assembly 7, so that the grouting position is always maintained at the borehole axis position, which is convenient for the uniformity of grouting.

[0030] In addition, the torsion spring 1 and the torsion spring 2 can ensure that the distance between the sliding ring 61 and the sliding cylinder 64 is always maintained when the telescopic device 5 pushes the support assembly 6, which is convenient for subsequent slurry pushing.

[0031] Preferably, an elastic bag can be added to the inner wall of the sliding cylinder 64 to increase the friction between the sliding cylinder 64 and the grouting assembly 7, so that when the telescopic device 5 pushes the support assembly 6, the sliding ring 61 can enable the hinge assembly 62 to push the support plate 63, so that the support plate 63 is away from the inner wall of the borehole, which can avoid scraping the inner wall of the borehole when installing the support assembly 6, causing a large amount of rock chips to fall, affecting the withdrawal of the support assembly 6.

[0032] It should be noted that the friction between the elastic sac and the grouting assembly 7 is less than the force of the slurry pushing and greater than the elastic force of the pressing spring, and the force of the slurry pushing depends on the shape and size of the pressing ring 65, that is, the overall contact area between the pressing ring 65 and the slurry, and the reverse force of the pressing spring can also press the slurry, thereby helping to discharge the gas in the slurry and avoid the formation of air holes, which affects the reinforcement effect.

[0033] In this embodiment, the grouting assembly 7 includes: a grouting pipe 71, which is connected to the grouting equipment 1; a conversion pipe 72, which is rotatably arranged in the grouting pipe 71 and driven by an external rotating motor; an expansion sleeve 74, which is sleeved on the outer wall of the grouting pipe 71; a grouting port 75, which is opened at the bottom of the grouting pipe 71, and a control valve 76 is fixed at its outlet.

[0034] It should be noted that the expansion sleeve 74 is sleeved on the outer wall of the grouting pipe 71 through an external sleeve device, so that an expansion sleeve 74 is sleeved on each borehole before grouting reinforcement.

[0035] Optionally, anti-skid grooves may be provided on both the inner and outer walls of the expansion sleeve 74 so that slurry can enter the anti-skid grooves during grouting, thereby increasing the pull-out resistance.

[0036] As a preferred embodiment, a plurality of slurry outlet holes 73 are opened on the circumference of the grouting pipe 71 and the conversion pipe 72, and the plurality of slurry outlet holes 73 on the grouting pipe 71 and the conversion pipe 72 correspond to each other one by one.

[0037] Among them, when grouting is carried out, the slurry is first injected from the grouting port 75 by opening the control valve 76, so that the slurry is filled between the expansion sleeve 74 and the inner wall of the borehole. During the filling, the grouting component 7 is gradually supported by the gradual withdrawal of the support component 6, so that the grouting component 7 is maintained at the axial position of the borehole. When the support component 6 is completely pushed out of the borehole, the hole is sealed by the sealing device (this is an existing means and will not be repeated here), completing the first grouting reinforcement of the borehole.

[0038] As a preferred embodiment, when the conversion tube 72 is in the initial state, the multiple slurry outlet holes 73 on the conversion tube 72 and the multiple slurry outlet holes 73 on the grouting tube 71 are arranged in an alternating manner.

[0039] Among them, after the completion of the primary grouting reinforcement, the conversion tube 72 is rotated by an external rotating device, so that the multiple slurry holes 73 on the conversion tube 72 correspond one to one with the multiple slurry holes 73 on the grouting pipe 71. At this time, the control valve 76 is closed, and the slurry for the secondary grouting is first injected from the slurry holes 73 between the grouting pipe 71 and the expansion sleeve 74, and the grouting pressure is greater than the primary grouting pressure, so that the expansion sleeve 74 expands, and then squeezes the slurry of the primary grouting, thereby improving the reinforcement effect and enabling the slurry of the primary grouting to spread evenly. When the expansion sleeve 74 is fully expanded, the slurry holes 73 are closed, and the control valve 76 is opened to inject the slurry from the grouting port 75. At the same time of this injection, the grouting pipe 71 gradually withdraws from the borehole, thereby completing the grouting reinforcement of the borehole.

[0040] It should be noted that the pressure of the slurry finally injected from the grouting port 75 can ensure that the expansion sleeve 74 does not rebound, thereby avoiding reducing the reinforcement effect.

[0041] During the specific implementation, first fix the two connecting plates 4 on the inner wall of the tunnel, then adjust the angle of the grouting equipment 1 by pushing the cylinder 2 and adjusting the extension of the cylinder 3 so that its angle is consistent with the drilling angle, and then put the grouting component 7 into the borehole through the grouting equipment 1, and the grouting component 7 needs to pass through the support component 6. When the grouting component 7 reaches the bottom of the borehole, the support component 6 slides to a position close to the bottom of the borehole through the telescopic device 5, and then a grouting is started. During grouting, the support component 6 gradually withdraws. After completely withdrawing from the borehole, a sealing device is used to seal the hole, and then a second grouting is carried out. After the grouting is completed, the grouting component 7 withdraws from the borehole and is completely sealed by the sealing device to complete the grouting reinforcement operation. Then, the expansion casing 74 is sleeved on the outer wall of the grouting pipe 71 through the casing equipment to carry out the grouting operation of the next borehole.

[0042] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coal mine tunnel grouting reinforcement device, characterized in that: include: Grouting equipment (1), with push cylinders (2) symmetrically fixed on its upper and lower sides; An adjusting cylinder (3) is symmetrically hinged on the upper and lower sides of the grouting equipment (1); The connecting plate (4) is configured as two, one end of which is hinged to the two pushing cylinders (2) respectively, and the other end of which is hinged to the adjusting cylinder (3) respectively; A telescopic device (5) is fixed on a side of the grouting device (1) close to the connecting plate (4); A support assembly (6) fixed to the output end of the telescopic device (5); A grouting assembly (7) is slidably disposed within the support assembly (6), passes through the telescopic device (5), and drives the telescopic and grouting operations through the grouting device (1).

2. A coal mine tunnel grouting reinforcement device according to claim 1, characterized in that: The support assembly (6) comprises: A sliding ring (61) having a plurality of hinge components (62) evenly hinged on a circumference of a side thereof away from the telescopic device (5); A plurality of support plates (63) are respectively hinged to one end of the plurality of hinge assemblies (62) away from the sliding ring (61); A sliding cylinder (64) is slidably arranged inside the plurality of support plates (63); The pressing ring (65) is fixed on a side of the sliding cylinder (64) away from the sliding ring (61).

3. A coal mine tunnel grouting reinforcement device according to claim 2, characterized in that: The hinge assembly (62) includes: A hinged member (621), one end of which is hinged to the sliding ring (61) and is sleeved with a torsion spring 1; The connecting rod (622) is hinged to the other end of the hinged member (621), and a second torsion spring is sleeved at the hinged position.

4. A coal mine tunnel grouting reinforcement device according to claim 3, characterized in that: When the torsion spring 1 and the torsion spring 2 are in an initial state, the connecting rod (622) tends to move away from the sliding ring (61).

5. A coal mine tunnel grouting reinforcement device according to claim 4, characterized in that: A fixing seat (641) is fixed at the corresponding positions of the outer wall of the sliding cylinder (64) and the supporting plate (63), and a guide block (642) is fixed on the fixing seat (641). The guide block (642) is arranged obliquely, and a pressing spring is arranged between the guide block (642) and the supporting plate (63). The expansion and contraction direction of the pressing spring is along the inclination direction of the guide block (642), and the expansion and contraction pressing spring pushes the supporting plate (63) to have a tendency to approach the sliding ring (61).

6. A coal mine tunnel grouting reinforcement device according to claim 1, characterized in that: The grouting assembly (7) comprises: A grouting pipe (71) connected to the grouting equipment (1); A conversion tube (72) is rotatably disposed in the grouting tube (71) and driven by an external rotary motor; An expansion sleeve (74) is sleeved on the outer wall of the grouting pipe (71); The grouting port (75) is opened at the bottom of the grouting pipe (71), and a control valve (76) is fixed at its outlet.

7. A coal mine tunnel grouting reinforcement device according to claim 6, characterized in that: A plurality of slurry outlet holes (73) are provided on the circumference of the grouting pipe (71) and the conversion pipe (72), and the plurality of slurry outlet holes (73) on the grouting pipe (71) and the conversion pipe (72) correspond to each other one by one.

8. A coal mine tunnel grouting reinforcement device according to claim 7, characterized in that: When the conversion tube (72) is in an initial state, the multiple slurry outlet holes (73) on the conversion tube (72) and the multiple slurry outlet holes (73) on the grouting tube (71) are arranged in a staggered manner.

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