A grouting device capable of quickly sealing roadway shallow surrounding rock fissures and a use method thereof

Abstract

The present application relates to a kind of grouting device that can quickly close roadway shallow surrounding rock fissure, including grouting pipe main body, stop grouting device, primary pipe line, secondary pipe line, opening isolation device, middle isolation device;Middle isolation device is arranged in the coaxial distribution with grouting pipe main body in grouting pipe main body, stop grouting device is arranged in the front half of grouting pipe main body, opening isolation device is connected with the front end surface of grouting pipe main body, primary pipe line, secondary pipe line are embedded in grouting pipe main body, the rear end surface of primary pipe line is located in the front of middle isolation device, and it is communicated with the front half of grouting pipe main body, the rear end surface of secondary pipe line is located in the back half of grouting pipe main body after passing through middle isolation device.The use method thereof includes three steps such as grouting hole setting, plugging positioning and plugging positioning.The present application can realize quick closure roadway shallow surrounding rock fissure compared with traditional grouting plugging equipment and process, avoid slurry leakage, to reach the broken surrounding rock of roadway is strengthened, and grouting plugging is good in bearing positioning capacity.

Description

TECHNICAL FIELD

[0001] The present application relates to a grouting device for quickly sealing the cracks of the shallow surrounding rock of a roadway and a use method, and belongs to the technical field of grouting sealing construction equipment. BACKGROUND

[0002] The broken surrounding rock of a roadway in a coal mine is often repaired or reinforced by grouting. Since the surrounding rock of the roadway is severely broken, the grout will leak out of the cracks when grouting is directly used, and the grouting effect cannot be achieved. Therefore, the surface of the roadway is generally sprayed with concrete to form a concrete spray layer, so as to prevent the grout from leaking out, which increases the roadway repair process and costs. At the same time, the traditional grouting sealing equipment is also prone to a decrease in the carrying capacity of the sealing equipment and damage to the sealing structure due to the deformation of the geological structure during operation, which makes it difficult to effectively meet the needs of actual construction operations. In view of this problem, the current technology for concrete spraying sealing operations has also been developed. However, in the concrete spraying operation, complex spraying equipment is often needed, and a corrosive accelerator is added to the concrete to meet the requirements of the concrete spraying operation, which on the one hand leads to the limitation of the spraying operation by the construction environment, making it difficult to effectively spray the roadway structure. On the other hand, due to the addition of the accelerator, the spraying operation is difficult and costly, and the corrosive accelerator also poses a great safety hazard to the construction equipment and personnel, increasing the safety risk of the construction.

[0003] Therefore, in view of the current situation, it is necessary to develop a sealing device and corresponding sealing process that can be applied to various roadway structures and has simple construction process, good flexibility and safety of equipment operation. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a grouting device and method for quickly sealing the cracks of the shallow surrounding rock of a roadway to overcome the above defects and meet the needs of actual equipment operation.

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

[0006] The application discloses a grouting device for quickly sealing the cracks of the shallow surrounding rock of a roadway, which comprises a grouting pipe main body, a grouting stopping device, a No.1 pipe line, a No.2 pipe line, an opening isolating device, a middle isolating device; wherein the grouting pipe main body is a hollow tubular structure with a rectangular axial section, a plurality of grouting holes are uniformly distributed on the pipe wall of the grouting pipe main body, the middle isolating device is coaxially arranged in the grouting pipe main body, and the grouting pipe main body is divided into two end cavities which are not communicated with each other along the axial line of the grouting pipe main body by the middle isolating device; meanwhile, the grouting stopping device is coaxially arranged in the front half of the grouting pipe main body, and the front half of the grouting pipe main body is blocked by the grouting stopping device; the opening isolating device is connected with the front end surface of the grouting pipe main body and coaxially arranged; the No.1 pipe line and the No.2 pipe line are embedded in the grouting pipe main body and symmetrically arranged on the two sides of the axial line of the grouting pipe main body; the No.1 pipe line and the No.2 pipe line are parallelly arranged with the axial line of the grouting pipe main body, and the front end surfaces of the No.1 pipe line and the No.2 pipe line are located outside the grouting pipe main body through the grouting stopping device and the opening isolating device; the rear end surface of the No.1 pipe line is located in front of the middle isolating device and is communicated with the front half of the grouting pipe main body; the rear end surface of the No.2 pipe line is located in the rear half of the grouting pipe main body through the middle isolating device and is communicated with the rear half of the grouting pipe main body.

[0007] Further, the opening isolating device and the middle isolating device are connected through a bearing spring which is coaxially arranged with the grouting pipe main body, and the distance between the opening isolating device and the middle isolating device is 30%-60% of the effective length of the grouting pipe main body.

[0008] Further, the opening isolation device and the middle isolation device comprise an elastic sealing ring, an elastic sealing block, a bearing spring, and a buffer head. The elastic sealing block is a cylindrical structure coaxially distributed with the grouting pipe body. The elastic sealing block is in abutting and sliding connection with the inner side of the grouting pipe body. The front half and the rear half of the side wall of the elastic sealing block are each provided with an elastic sealing ring coaxially distributed therewith and in abutting and sliding connection with the inner side of the grouting pipe body. Meanwhile, the side wall of the elastic sealing block is provided with at least three bearing grooves evenly distributed around the axis of the elastic sealing block. Each bearing groove is provided with a bearing spring. The bearing spring is a plate-shaped structure with a triangular or circular axial section. One end of the bearing spring is hinged with the bottom of the bearing groove through an elastic hinge. The other end of the bearing spring is in abutting and sliding connection with the bottom of the bearing groove. Meanwhile, the outer side of the bearing spring is 0-5 mm longer than the outer side of the elastic sealing block and is in abutting and sliding connection with the inner side of the grouting pipe body. The elastic sealing block is provided with a through hole parallel to the axis of the elastic sealing block. The first pipeline and the second pipeline are connected with the elastic sealing block through the through hole. The through hole is provided with at least two elastic sealing rings distributed along the axial direction of the through hole. The outer sides of the first pipeline and the second pipeline are in abutting and sliding connection with the elastic sealing rings. The front end face and the rear end face of the elastic sealing block are each provided with a buffer head coaxially distributed therewith. The buffer head is a spherical cap structure. The rear end face of the buffer head is connected with the elastic sealing block through a spring with a distance of not less than 5 mm. Meanwhile, the side wall of the buffer head is in abutting and sliding connection with the inner side of the grouting pipe body. The buffer head and the through hole are provided with a guide groove parallel to the axis of the through hole. The first pipeline and the second pipeline are covered by the guide groove and are in sliding connection with the first pipeline and the second pipeline.

[0009] Further, the grouting stopping device comprises an elastic pressure disc, an elastic sealing plug, an adjusting column, and a positioning anchor rod. The elastic sealing plug is a columnar structure with a rectangular axial section. The elastic sealing plug is embedded in the front end face of the grouting pipe body, coaxially distributed with the grouting pipe body, and in abutting and sliding connection with the inner side of the grouting pipe body. The adjusting column is a cylindrical screw structure coaxially distributed with the elastic sealing plug. The front half of the adjusting column is embedded in the elastic sealing plug and is in threaded connection with the elastic sealing plug. The elastic pressure disc is a disc-shaped structure coaxially distributed with the elastic sealing plug. The middle part of the elastic pressure disc is provided with a connecting screw hole coaxially distributed therewith. The elastic pressure disc is covered on the rear half of the adjusting column through the connecting screw hole and is in threaded connection with the adjusting column. The elastic sealing plug is provided with two connecting holes evenly distributed around the axis of the elastic sealing plug. The first pipeline and the second pipeline are connected with the elastic sealing plug through the connecting holes. The front end face of the elastic sealing plug is located outside the grouting pipe body. Meanwhile, the elastic pressure discs corresponding to the first pipeline and the second pipeline are provided with adjusting grooves evenly distributed around the axis of the elastic pressure disc. The elastic pressure disc is provided with at least three connecting anchor holes evenly distributed around the axis of the elastic pressure disc. Each anchor hole is provided with a positioning anchor rod. The elastic pressure disc is connected with the rock wall through the positioning anchor rod.

[0010] Further, the elastic pressure disc comprises a positioning section, an elastic deformation section and a connecting spring, wherein the elastic deformation section is a spherical cap structure, the elastic deformation section is provided with a connecting screw hole coaxially distributed with the elastic deformation section, the positioning section is covered outside the elastic deformation section and coaxially distributed with the elastic deformation section, the lower end surface of the elastic deformation section is flush with the lower end surface of the positioning section and is commonly distributed in the same plane with an angle of 45°-90° with the main axis of the grouting pipe, the adjusting groove is embedded in the positioning section and is a circular arc groove structure coaxially distributed with the elastic deformation section, and the axis of the connecting spring is perpendicular to the axis of the elastic deformation section, and the upper end surfaces of the two adjacent positioning anchor rods are connected by the connecting spring.

[0011] Further, the lower half of the grouting pipe body is provided with a plurality of reinforcing rib plates and a positioning ring, the reinforcing rib plates are in any one of triangular, isosceles trapezoidal and sector structures, the plate surface of the reinforcing rib plate forms an angle of 30°-90° with the axis of the grouting pipe body, each reinforcing rib plate is distributed in a spiral structure around the axis of the grouting pipe body, the positioning ring is covered outside the grouting pipe body and coaxially distributed with the grouting pipe body, the lower end surface of the positioning ring abuts against the upper end surface of the topmost reinforcing rib, the outer diameter of the positioning ring is at least 5 mm larger than the outer diameter of the grouting pipe body, and the outer surface of the positioning ring is flush with the outer surface of the reinforcing rib plate.

[0012] A construction method of a grouting device capable of quickly sealing the cracks of the shallow surrounding rock of a roadway, comprising the following steps:

[0013] S1, grouting hole setting, first, according to the needs of grouting operation, grouting hole processing is prepared on the rock wall, and the spacing between adjacent grouting holes is 1-10 meters, and the axis of the grouting hole forms an angle of 30°-90° with the rock wall; meanwhile, according to the structure size and quantity of the grouting hole, the grouting pipe body, the grouting device, the first pipe, the second pipe, the opening isolation device and the middle isolation device are set and assembled to obtain a plurality of grouting sealing devices meeting the use needs;

[0014] S2, sealing positioning, first, resin anchoring agent is added to the bottom of the grouting hole opened in step S1, then the grouting sealing device assembled in step S1 is embedded into the grouting hole and coaxially distributed between the grouting holes, and the lower end surface of the grouting pipe body of the grouting sealing device is bonded and fixed between the drill hole walls through the resin anchoring agent to complete the preliminary positioning of the grouting sealing device; then, the grouting device is adjusted, on the one hand, the end surface of the grouting pipe body is sealed and blocked by the grouting device, and on the other hand, the gap between the grouting pipe body and the drill hole wall is adjusted; on the other hand, the grouting pipe body is reinforced and positioned between the rock walls of the grouting hole through the grouting device;

[0015] S3, plugging and positioning, after the completion of S2, first, the foaming material is injected into the front half of the grouting pipe body through the first pipeline, and overflowed into the gap between the front half of the grouting pipe body and the grouting hole through the grouting hole in the front half of the grouting pipe body wall, and then the foaming material is expanded in the gap between the grouting pipe body and the grouting hole, so as to compress the shallow surrounding rock fissure and realize the sealing of the corresponding shallow surrounding rock fissure of the roadway by the front half of the grouting pipe body; then, the grouting material is injected into the rear half of the grouting pipe body through the second pipeline, and overflowed into the gap between the rear half of the grouting pipe body and the grouting hole through the grouting hole in the rear half of the grouting pipe body wall, and then the grouting material is infiltrated into the fissure of the grouting hole rock wall under the driving pressure, so as to realize the sealing of the corresponding deep surrounding rock fissure of the roadway by the rear half of the grouting pipe body; that is, the grouting and plugging operation is completed.

[0016] Further, in the S1 step, when the grouting and plugging device is configured according to the grouting hole, first, the same construction operation number is assigned to each grouting hole; then, the corresponding grouting and plugging device is assigned to each grouting hole, and the construction operation number matched with the grouting hole is assigned to each grouting and plugging device.

[0017] The device has simple structure, strong environmental adaptability, good universality and construction flexibility, and can realize rapid sealing of the shallow surrounding rock fissure of the roadway, avoid leakage of the grout, and thus achieve the purpose of strengthening the broken surrounding rock of the roadway. After grouting and plugging, the bearing and positioning capacity is good, the risk of failure of the plugging structure caused by the deformation of the geological structure can be improved, and the reliability and stability of the plugging operation are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be described in detail below with reference to the drawings and specific embodiments.

[0019] Figure 1 The figure is a structural schematic diagram of the system of the application;

[0020] Figure 2 The figure is a local structural schematic diagram of the opening isolation device and the middle isolation device;

[0021] Figure 3 The figure is a flow chart of the use method of the application. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects achieved by the application easy to understand, the application will be further described below in combination with specific embodiments.

[0023] As Figure 1 and 2As shown, a grouting device capable of quickly sealing the shallow surrounding rock fissures of roadway, comprising a grouting pipe body 1, a grout stopping device 2, a first pipe line 3, a second pipe line 4, an opening isolation device 5, a middle isolation device 6; wherein the grouting pipe body 1 is a hollow tubular structure with a rectangular axial section, a plurality of grout outlets 7 are uniformly distributed on the pipe wall of the grouting pipe body 1, the middle isolation device 6 is coaxially arranged in the grouting pipe body 1, and the grouting pipe body 1 is divided into two end cavities that are not connected to each other along the axis of the grouting pipe body 1 by the middle isolation device 6, at the same time, the grouting pipe body 1 is provided with the grout stopping device 2 coaxially arranged in the front half of the grouting pipe body 1, and the front half of the grouting pipe body 1 is blocked by the grout stopping device 2, the opening isolation device 5 is connected to the front end face of the grouting pipe body 1 and coaxially arranged, the first pipe line 3 and the second pipe line 4 are embedded in the grouting pipe body 1 and symmetrically arranged on both sides of the axis of the grouting pipe body 1, the first pipe line 3 and the second pipe line 4 are parallelly arranged with the axis of the grouting pipe body 1, and the front end faces of the first pipe line 3 and the second pipe line 4 are located outside the grouting pipe body 1 through the grout stopping device 2 and the opening isolation device 5, the rear end face of the first pipe line 3 is located in front of the middle isolation device 6 and communicates with the front half of the grouting pipe body 1, and the rear end face of the second pipe line 4 is located in the rear half of the grouting pipe body 1 through the middle isolation device 6 and communicates with the rear half of the grouting pipe body 1.

[0024] In this embodiment, the opening isolation device 5 and the middle isolation device 6 are connected by a bearing spring 8 coaxially arranged with the grouting pipe body 1, and the distance between the opening isolation device 5 and the middle isolation device 6 is 30%-60% of the effective length of the grouting pipe body 1.

[0025] The bearing spring can adjust the middle isolation device along the axis of the grouting pipe body during the grouting process due to the pressure change of the grouting material, so as to adjust and balance the grouting pressure.

[0026] The opening isolation device 5 and the middle isolation device 6 include an elastic sealing ring 101, an elastic sealing block 102, a bearing spring 103, and a buffer head 104. The elastic sealing block 102 is a cylindrical structure coaxially distributed with the grouting pipe body 1. The elastic sealing block 102 is in abutting and sliding connection with the inner side of the grouting pipe body 1. The front half and the rear half of the side wall of the elastic sealing block 102 are each provided with an elastic sealing ring 101 coaxially distributed therewith and in abutting and sliding connection with the inner side of the grouting pipe body 1 through the elastic sealing ring 101. Meanwhile, the side wall of the elastic sealing block 102 is provided with at least three bearing grooves 105 evenly distributed around the axis of the elastic sealing block 102. Each bearing groove 105 is provided with a bearing spring 103. The bearing spring 103 is a plate-shaped structure with a triangular or circular axial section. One end of the bearing spring 103 is hinged with the groove bottom of the bearing groove 105 through an elastic hinge, and the other end is in abutting and sliding connection with the groove bottom of the bearing groove 105. Meanwhile, the outer side of the bearing spring 103 exceeds the outer side of the elastic sealing block 102 by 0-5 mm and is in abutting and sliding connection with the inner side of the grouting pipe body 1. The elastic sealing block 102 is provided with a through hole 106 distributed in parallel with the axis thereof, and the first pipeline 3 and the second pipeline 4 are connected with the elastic sealing block 102 through the through hole 106. The through hole 106 is additionally provided with at least two elastic sealing rings 101 distributed along the axial direction of the through hole 106 and in abutting and sliding connection with the outer side of the first pipeline 3 and the second pipeline 4 through the elastic sealing ring 101. The front end face and the rear end face of the elastic sealing block 102 are each provided with a buffer head 104 coaxially distributed therewith. The buffer head 104 is a spherical cap structure, the rear end face of which is connected with the elastic sealing block 102 through a spring 107 with a spacing of not less than 5 mm. Meanwhile, the side wall of the buffer head 104 is in abutting and sliding connection with the inner side of the grouting pipe body 1. The buffer head 104 and the through hole 106 are provided with a guide groove 108 distributed in parallel with the axis of the through hole 106, which covers the first pipeline 3 and the second pipeline 4 and is in sliding connection with the first pipeline 3 and the second pipeline 4.

[0027] The bearing spring can effectively improve the abutting of the elastic sealing block with the inner side of the wall of the grouting pipe body, thereby improving the stability of the positioning of the elastic sealing block in the grouting pipe body. Meanwhile, the elastic sealing ring can effectively improve the sealing capacity of the opening isolation device and the middle isolation device. In addition, in operation, the buffer head and the spring can be further matched to realize the uniform distribution of the grouting material and uniformly disperse the pressure of the grouting material, thereby reducing the influence of the conveying pressure of the grouting material on the elastic sealing block during grouting operation.

[0028] Meanwhile, the stopper 2 comprises an elastic pressure plate 21, an elastic sealing plug 22, an adjusting column 23 and an anchor 24, wherein the elastic sealing plug 22 is a columnar structure with a rectangular axial section, embedded in the front end surface of the grouting pipe body 1, coaxially distributed with the grouting pipe body 1 and abutting against and slidingly connected with the inner surface of the grouting pipe body 1, the adjusting column 23 is a cylindrical screw structure coaxially distributed with the elastic sealing plug 22, the front half of the adjusting column 23 is embedded in the elastic sealing plug 22 and connected with the elastic sealing plug 22 through threads, the elastic pressure plate 21 is a disc-shaped structure coaxially distributed with the elastic sealing plug 22, the middle of the elastic pressure plate 21 is provided with a connecting screw hole 25 coaxially distributed therewith, the elastic pressure plate 21 is covered on the rear half of the adjusting column 23 through the connecting screw hole 25 and connected with the adjusting column 23 through threads, the elastic sealing plug 22 is further provided with two connecting holes 25 evenly distributed around the axis thereof, a first pipeline 3 and a second pipeline 4 are connected with the elastic sealing plug 22 through the connecting holes 25, and the front end surfaces thereof are located outside the grouting pipe body 1, meanwhile, the elastic pressure plate 21 of the first pipeline 3 and the second pipeline 4 is provided with adjusting grooves 26 evenly distributed around the axis of the elastic pressure plate 21, the elastic pressure plate 21 is further provided with at least three connecting anchor holes 27 evenly distributed around the axis thereof, and each anchor hole 27 is provided with an anchor 24, and the elastic pressure plate 21 is connected with the rock wall through the anchor 24.

[0029] The elastic pressure plate can be connected and positioned with the rock wall through the anchor, improve the positioning stability of the device, and improve the bearing and positioning capacity of the stopper on the grouting pipe body, and the distance between the elastic sealing plug and the elastic pressure plate can be flexibly adjusted according to the use requirement through the adjusting column, and the smaller the distance between the elastic sealing plug and the elastic pressure plate is, the greater the pressure on the elastic pressure plate is, the greater the pre-stress between the elastic pressure plate and the rock wall is, and the greater the positioning force is, but when the geological structure of the rock wall changes, the elastic deformation capacity of the elastic pressure plate is worse, so that the positioning force and the bearing force of the device can be adjusted by adjusting the distance between the elastic sealing plug and the elastic pressure plate.

[0030] It should be noted that the elastic pressure plate 21 includes a positioning section 211, an elastic deformation section 212, and a connecting spring 213, wherein the elastic deformation section 212 is a spherical cap structure, and the elastic deformation section 212 is provided with a connecting threaded hole 25 coaxially distributed therewith, the positioning section 211 is covered outside the elastic deformation section 212 and is coaxially distributed with the elastic deformation section 212, and the lower end surface of the elastic deformation section 212 is flush with the lower end surface of the positioning section 211 and is commonly distributed in the same plane with the axis of the grouting pipe body 1 at an angle of 45°-90°, and the adjusting groove 26 is embedded in the positioning section 211 and is a circular arc groove structure coaxially distributed with the elastic deformation section 212, and the axis of the connecting spring 213 is perpendicular to the axis of the elastic deformation section 212, and the upper end surfaces of the two adjacent positioning anchor rods 24 are connected by the connecting spring 213.

[0031] In addition, the lower half of the grouting pipe body 1 is provided with a plurality of reinforcing rib plates 11 and a positioning ring 12 distributed around the axis, the reinforcing rib plates 11 are in any one of triangular, isosceles trapezoidal, and sector structures, and the plate surface of the reinforcing rib plate 11 is at an angle of 30°-90° with the axis of the grouting pipe body, each reinforcing rib plate 11 is distributed in a spiral structure around the axis of the grouting pipe body 1, the positioning ring 12 is covered outside the grouting pipe body 1 and is coaxially distributed with the grouting pipe body 1, the lower end surface of the positioning ring 12 abuts against the upper end surface of the topmost reinforcing rib 11, the outer diameter of the positioning ring 12 is at least 5 mm larger than the outer diameter of the grouting pipe body 1, and the outer side surface of the positioning ring 12 is flush with the outer side surface of the reinforcing rib plate 11.

[0032] The reinforcing rib plates improve the structural stability when the grouting pipe body is connected with the resin anchoring agent, and the positioning ring limits and blocks the position of the resin anchoring agent to improve the positioning accuracy of the distribution position when the resin anchoring agent is connected with the grouting pipe body.

[0033] As shown in Figure 3 A construction method of a grouting device capable of quickly sealing the shallow surrounding rock fissures of a roadway, including the following steps:

[0034] S1, grouting hole setting, first, according to the needs of grouting operation, grouting hole processing preparation is carried out on the rock wall, and the spacing between adjacent grouting holes is 1-10 meters, and the axis of the grouting hole is at an angle of 30°-90° with the rock wall; and according to the structure size and number of the grouting hole, the grouting pipe body, the grouting device, the first pipe, the second pipe, the opening isolation device, and the middle isolation device structure are respectively set and assembled to obtain a plurality of grouting sealing devices meeting the use needs;

[0035] S2, plugging and positioning, first, resin anchoring agent is added to the bottom of the grouting hole opened in S1 step, then the grouting plugging device assembled in S1 step is embedded into the grouting hole and distributed coaxially between the grouting holes, and the lower end surface of the grouting pipe body of the grouting plugging device is bonded and fixed between the drill hole walls through the resin anchoring agent, completing the preliminary positioning of the grouting plugging device; then the stop grouting device is adjusted, on the one hand, the end surface of the grouting pipe body is sealed and plugged by the stop grouting device, and on the other hand, the gap between the grouting pipe body and the drill hole wall is adjusted and set;

[0036] S3, plugging and positioning, after completing S2 step, first, foam material is injected into the front half of the grouting pipe body through the No. 1 pipeline, and overflowed into the gap between the front half of the grouting pipe body and the grouting hole through the grouting holes in the front half of the grouting pipe body wall, and after the expansion of the foam material in the gap between the grouting pipe body and the grouting hole, the shallow surrounding rock fissures are compressed, realizing the sealing of the front half of the grouting pipe body to the corresponding shallow surrounding rock fissures of the roadway; then the grouting material is injected into the rear half of the grouting pipe body through the No. 2 pipeline, and overflowed into the gap between the rear half of the grouting pipe body and the grouting hole through the grouting holes in the rear half of the grouting pipe body wall, and the grouting material is infiltrated into the fissures of the grouting hole wall under the driving pressure, thereby realizing the sealing of the rear half of the grouting pipe body to the corresponding deep surrounding rock fissures of the roadway; the grouting plugging operation can be completed.

[0037] In the S1 step of the embodiment, when the grouting plugging device is configured according to the grouting hole, first, the same construction operation number is assigned to each grouting hole; then the corresponding grouting plugging device is assigned to each grouting hole, and the construction operation number matched with the grouting hole is assigned to each grouting plugging device.

[0038] The device of the present application has simple structure, strong environmental adaptability, good versatility and construction flexibility, and can realize rapid sealing of the shallow surrounding rock fissures of the roadway, avoid leakage of the grout, thereby achieving the purpose of strengthening the broken surrounding rock of the roadway, and the bearing and positioning capacity after grouting plugging is good, which can improve the risk of failure of the plugging structure caused by the deformation of the geological structure, and effectively improve the reliability and stability of the plugging operation.

[0039] It should be understood by those skilled in the art that the present application is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A grouting device for rapidly sealing shallow rock fissures in roadways, characterized in that: The grouting device for quickly sealing shallow rock fissures in roadways includes a grouting pipe body, a grout-stopping device, a first pipeline, a second pipeline, an opening isolation device, and a central isolation device. The grouting pipe body is a hollow tubular structure with a rectangular axial cross-section and several grout outlet holes evenly distributed on its wall. A central isolation device, coaxially distributed within the grouting pipe body, divides the grouting pipe body into two non-communicating cavities along its axis. Simultaneously, a grout-stopping device, coaxially distributed within the front half of the grouting pipe body, seals the front half of the grouting pipe body. The opening isolation device is connected to and coaxially distributed with the front end face of the grouting pipe body. The No. 1 pipe and the No. 2 pipe are both embedded in the grouting pipe body and symmetrically distributed on both sides of the axis of the grouting pipe body. The No. 1 pipe and the No. 2 pipe are both distributed parallel to the axis of the grouting pipe body. The front end faces of the No. 1 pipe and the No. 2 pipe are located outside the grouting pipe body through the grout-stopping device and the opening isolation device. The rear end face of the No. 1 pipe is located in front of the middle isolation device and is connected to the front half of the grouting pipe body. The rear end face of the No. 2 pipe is located inside the rear half of the grouting pipe body after passing through the middle isolation device and is connected to the rear half of the grouting pipe body.

2. The grouting device for rapidly sealing shallow rock fissures in roadways according to claim 1, characterized in that: The opening isolation device and the middle isolation device are connected by a load-bearing spring that is coaxially distributed with the main body of the grouting pipe. The distance between the opening isolation device and the middle isolation device is 30% to 60% of the effective length of the main body of the grouting pipe.

3. A grouting device for rapidly sealing shallow surrounding rock fissures in roadways according to claim 1 or 2, characterized in that: The aforementioned opening isolation device and central isolation device include an elastic sealing ring, an elastic sealing block, a bearing spring, and a buffer head. The elastic sealing block is a cylindrical structure coaxially distributed with the main body of the grouting pipe. The elastic sealing block abuts against and slides against the inner surface of the main body of the grouting pipe. An elastic sealing ring is provided on the front and rear halves of the sidewall of the elastic sealing block, coaxially distributed with it, and abuts against and slides against the inner surface of the main body of the grouting pipe through the elastic sealing ring. Simultaneously, the sidewall of the elastic sealing block has at least three bearing grooves evenly distributed around its axis. Each bearing groove contains a bearing spring, which is a plate-shaped structure with a triangular or circular axial cross-section. One end of the spring is hinged to the bottom of the bearing groove via an elastic hinge, and the other end abuts against and slides against the bottom of the bearing groove. The outer surface of the bearing spring extends 0-5 mm beyond the outer surface of the elastic sealing block. The elastic sealing block is provided with through holes distributed parallel to its axis, and the first and second pipelines are connected to the elastic sealing block through the through holes. The through hole wall is provided with at least two elastic sealing rings distributed along the through hole axis, and the elastic sealing rings are connected to the outer side of the first and second pipelines through the elastic sealing rings through the through holes ...

4. A grouting device for rapidly sealing shallow rock fissures in roadways according to claim 1, characterized in that: The grout-stopping device includes an elastic pressure plate, an elastic sealing plug, an adjusting column, and a positioning anchor. The elastic sealing plug is a cylindrical structure with a rectangular axial cross-section, embedded in the front end face of the grouting pipe body, coaxially distributed with the grouting pipe body, and abutting against and slidingly connected to the inner side of the grouting pipe body. The adjusting column is a cylindrical screw structure coaxially distributed with the elastic sealing plug; the front half of the adjusting column is embedded in the elastic sealing plug and connected to the elastic sealing plug via a thread. The elastic pressure plate is a disc-shaped structure coaxially distributed with the elastic sealing plug, and a positioning anchor is provided in the middle of the elastic pressure plate. The connecting screw hole covers the rear half of the adjusting column and is connected to the adjusting column by threads. The elastic sealing plug is provided with two connecting holes evenly distributed around its axis. Pipeline No. 1 and Pipeline No. 2 are connected to the elastic sealing plug through the connecting holes, and their front ends are located outside the grouting pipe body. At the same time, the elastic pressure plate corresponding to Pipeline No. 1 and Pipeline No. 2 is provided with adjusting grooves evenly distributed around the axis of the elastic pressure plate. The elastic pressure plate is provided with at least three connecting anchor holes evenly distributed around its axis, and each anchor hole is provided with a positioning anchor rod. The elastic pressure plate is connected to the rock wall through the positioning anchor rods.

5. A grouting device for rapidly sealing shallow surrounding rock fissures in roadways according to claim 4, characterized in that: The elastic pressure plate includes a positioning section, an elastic deformation section, and a connecting spring. The elastic deformation section has a spherical crown-shaped structure and a connecting screw hole coaxially distributed therewith. The positioning section covers the elastic deformation section and is coaxially distributed with it. The lower end face of the elastic deformation section is flush with the lower end face of the positioning section and they are both distributed in the same plane at an angle of 45° to 90° with the axis of the grouting pipe body. The adjusting groove is embedded in the positioning section and is an arc-shaped groove structure coaxially distributed with the elastic deformation section. The axis of the connecting spring is perpendicular to the axis of the elastic deformation section. The upper end faces of two adjacent positioning anchors are connected by the connecting spring.

6. A grouting device for rapidly sealing shallow rock fissures in roadways according to claim 1, characterized in that: The lower half of the grouting pipe body is provided with several reinforcing ribs evenly distributed around its axis and a positioning ring. The reinforcing ribs can be any of the following structures: triangular, isosceles trapezoidal, and fan-shaped. The surface of the reinforcing ribs forms an angle of 30° to 90° with the axis of the grouting pipe body. The reinforcing ribs are distributed in a spiral structure around the axis of the grouting pipe body. The positioning ring covers the outside of the grouting pipe body and is distributed coaxially with the grouting pipe body. The lower end face of the positioning ring abuts against the upper end face of the topmost reinforcing rib. The outer diameter of the positioning ring is at least 5 mm larger than the outer diameter of the grouting pipe body. The outer side of the positioning ring is flush with the outer side of the reinforcing rib.

7. The construction method of a grouting device for rapidly sealing shallow surrounding rock fissures in roadways according to claim 1, characterized in that: The construction method of the grouting device that can quickly seal shallow surrounding rock fissures in roadways includes the following steps: S1, Grouting Hole Setup: First, according to the needs of the grouting operation, grouting holes are processed and prepared on the rock wall, with the spacing between adjacent grouting holes being 1-10 meters, and the axis of the grouting hole forming an angle of 30°-90° with the rock wall; at the same time, according to the structural dimensions and number of grouting holes, the main body of the grouting pipe, grout stopping device, No. 1 pipe, No. 2 pipe, opening isolation device, and middle isolation device are set up and assembled to obtain several grouting devices that meet the usage requirements; S2, Sealing and Positioning: First, resin anchoring agent is added to the bottom of the grouting hole opened in step S1. Then, the grouting device assembled in step S1 is embedded into the grouting hole and coaxially distributed between the grouting holes. At the same time, the lower end face of the grouting pipe body of the grouting device is bonded and fixed to the borehole wall with resin anchoring agent, completing the initial positioning of the grouting device. Then, the grout-stopping device is adjusted. On the one hand, the grout-stopping device seals and plugs the end face of the grouting pipe body, and on the other hand, it adjusts and sets the gap between the grouting pipe body and the borehole wall. The grout-stopping device also strengthens the positioning of the grouting pipe body between the grouting hole rock wall. S3, Sealing and Positioning: After completing step S2, firstly, the foaming material is injected into the front half of the grouting pipe body through pipeline No.

1. It overflows through the grout outlet on the wall of the front half of the grouting pipe body into the gap between the front half of the grouting pipe body and the grouting hole. The foaming material expands within this gap, compressing shallow surrounding rock fissures and sealing the corresponding shallow surrounding rock fissures in the roadway. Then, the grouting material is injected into the rear half of the grouting pipe body through pipeline No.

2. It overflows through the grout outlet on the wall of the rear half of the grouting pipe body into the gap between the rear half of the grouting pipe body and the grouting hole. Under driving pressure, the grouting material penetrates into the fissures in the rock wall of the grouting hole, thus sealing the corresponding deep surrounding rock fissures in the roadway through the rear half of the grouting pipe body. This completes the grouting and sealing operation.

8. A method for a grouting device for rapidly sealing shallow surrounding rock fissures in a roadway according to claim 7, characterized in that: In step S1, when configuring the grouting device according to the grouting hole, firstly, a construction operation number is uniformly assigned to each grouting hole; then, a corresponding grouting device is assigned to each grouting hole, and a construction operation number matching the grouting hole is assigned to each grouting device.

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