Single-hole deep and shallow layered grouting device and method

Abstract

The invention relates to a single-hole deep and shallow layered grouting device and method.The single-hole deep and shallow layered grouting device comprises a grouting pipe, an annular bag, a high-pressure hose, a grout non-return structure and bag fixing structures, the bag fixing structures are arranged on the outer side of the grouting pipe side by side, and the annular bag wraps the outer side of the grouting pipe; the side end of the annular bag is fixed to the grouting pipe through the two bag fixing structures, the grout non-return structure is connected to the side end of the high-pressure hose, and the other side end of the high-pressure hose penetrates through the bag fixing structures to communicate with the annular bag. The method preferably adopts a single-hole segmented grouting process to seal and fill the surrounding rock cracks of the roadway, indirectly increases the filling rate of the cracks, improves the overall stability of the roadway to the greatest extent, prolongs the service life of the roadway service, and is suitable for popularization and use.

Description

Technical Field

[0001] This invention relates to the field of grouting in mining, and particularly to a single-hole, shallow-depth stratified grouting device and method. Background Technology

[0002] Mining activities affect the excavation of soft rock strata in underground tunnels, altering the original rock stress and causing varying degrees of deformation and fissure development around the tunnel. Fissure development typically progresses from the surface of the surrounding rock to deeper layers, meaning that fissures are more severe at the surface than in the interior. Failure to effectively control fissure development can lead to further tunnel deformation, severely impacting mine safety. Grouting can fill these fissures, increasing rock strength and controlling deformation. However, in practice, due to geological conditions and other factors, grouting often fails to achieve the desired effect. Typically, grouting only seals the opening of the grouting hole, allowing the grout to flow from the hole around the fissures to different depths. If shallow fissures have already penetrated the surface, the grout will flow outwards, failing to fill the deeper fissures. Therefore, a single-hole, shallow-depth stratified grouting device is designed. Summary of the Invention

[0003] The purpose of this invention is to provide a single-hole, shallow-depth stratified grouting device and method to solve the above-mentioned technical problems. To achieve the above objective, the present invention adopts the following technical solution: A single-hole, shallow-depth stratified grouting device includes a grouting pipe, an annular bag, a high-pressure hose, a grout anti-reverse structure, and a bag fixing structure. The bag fixing structures are arranged side by side on the outside of the grouting pipe. The annular bag covers the outside of the grouting pipe, and the side end of the annular bag is fixed to the grouting pipe by two sets of bag fixing structures. The grout anti-reverse structure is connected to the side end of the high-pressure hose, and the other side end of the high-pressure hose passes through the bag fixing structure and communicates with the annular bag.

[0004] Based on the above technical solution, the annular bag has an annular fixing edge at its side end. The bag fixing structure consists of a grouting pipe fixing ring, a movable clamping ring, and a fixing bolt. The grouting pipe fixing rings are fixed side by side on the grouting pipe. Two sets of movable clamping rings are provided, symmetrically arranged on the outside of the two sets of grouting pipe fixing rings. The grouting pipe fixing rings and movable clamping rings are provided with corresponding fixing screw holes. The annular fixing edge is located between the grouting pipe fixing rings and the movable clamping rings. The fixing bolts are correspondingly fixed on the grouting pipe fixing rings and the movable clamping rings. The grouting pipe fixing rings and the movable clamping rings on one side have corresponding pipeline perforations, and the pipeline perforations are connected to the inside of the annular bag. The side end of the high-pressure hose is inserted into the pipeline perforation.

[0005] Based on the above technical solution, the slurry anti-reverse structure is composed of a valve core tube, a rubber sleeve, and an outer valve sleeve. The rubber sleeve is placed on the outside of one side end of the valve core tube, and the outer valve sleeve is threaded to the outside of the valve core tube and tightly attached to the outside of the rubber sleeve. The high-pressure hose clamp is fixed on the outside of the outer valve sleeve, and the side end of the valve core tube and the rubber sleeve are set inside the high-pressure hose.

[0006] Based on the above technical solution, the valve core tube is composed of a variable diameter inner sleeve, a valve sleeve connecting thread, and a pump set connecting end. The pump set connecting end is located at the side end of the variable diameter inner sleeve, and the valve sleeve connecting thread is located on the outside of the side end of the variable diameter inner sleeve. The outer valve sleeve is correspondingly provided with a valve sleeve connecting thread inside. The valve sleeve connecting thread on the outer valve sleeve and the valve sleeve connecting thread on the variable diameter inner sleeve are connected accordingly. A drain port is opened on the outer side of the side end of the variable diameter inner sleeve. The rubber sleeve is placed on the outside of the variable diameter inner sleeve, and the rubber sleeve seals the outside of the drain port.

[0007] Compared with the prior art, the present invention has the following advantages: The present invention adopts a single-hole segmented grouting process to seal and fill the fissures in the surrounding rock of the roadway, which indirectly increases the fissure filling rate, maximizes the overall stability of the roadway, and extends the service life of the roadway, and is suitable for widespread use. Attached Figure Description

[0008] Figure 1 This is a diagram showing the overall appearance of the present invention.

[0009] Figure 2 This is a schematic diagram showing the structural breakdown of the present invention.

[0010] Figure 3 This is a schematic diagram of the slurry anti-reverse structure of the present invention.

[0011] Figure 4 This is a detailed schematic diagram showing the breakdown of the slurry anti-reverse structure of the present invention.

[0012] In the diagram: 1. Grouting pipe; 2. Annular bladder; 3. High-pressure hose; 4. Grout anti-reverse structure; 5. Bladder fixing structure; 6. Annular fixing edge; 7. Grouting pipe fixing ring; 8. Movable clamping ring; 9. Fixing bolt; 10. Fixing screw hole; 11. Pipeline perforation; 12. Valve core pipe; 13. Rubber sleeve; 14. Outer valve sleeve; 15. Inner sleeve with reducing diameter; 16. Valve sleeve connection thread; 17. Pump set connection end; 18. Drainage port. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] A single-hole, shallow-depth stratified grouting device includes a grouting pipe 1, an annular bag 2, a high-pressure hose 3, a grout anti-reverse structure 4, and a bag fixing structure 5. The bag fixing structures 5 are arranged side by side on the outside of the grouting pipe 1. The annular bag 2 covers the outside of the grouting pipe 1, and the side end of the annular bag 2 is fixed to the grouting pipe 1 by two sets of bag fixing structures 5. The grout anti-reverse structure 4 is connected to the side end of the high-pressure hose 3, and the other side end of the high-pressure hose 3 passes through the bag fixing structure 5 and communicates with the annular bag 2.

[0015] The annular bag 2 has an annular fixing edge 6 on its side. The bag fixing structure 5 consists of a grouting pipe fixing ring 7, a movable clamping ring 8, and a fixing bolt 9. The grouting pipe fixing ring 7 is fixed in parallel on the grouting pipe 1. There are two sets of movable clamping rings 8, which are symmetrically arranged on the outside of the two sets of grouting pipe fixing rings 7. The grouting pipe fixing ring 7 and the movable clamping ring 8 are respectively provided with fixing screw holes 10. The annular fixing edge 6 is located between the grouting pipe fixing ring 7 and the movable clamping ring 8. The fixing bolt 9 is respectively fixed on the grouting pipe fixing ring 7 and the movable clamping ring 8. The grouting pipe fixing ring 7 and the movable clamping ring 8 on one side are provided with corresponding pipeline perforations 11, and the pipeline perforations 11 are connected to the inside of the annular bag 2. The side end of the high-pressure hose 3 is inserted into the pipeline perforation 11.

[0016] The slurry anti-reverse structure 4 consists of a valve core tube 12, a rubber sleeve 13, and an outer valve sleeve 14. The rubber sleeve 13 is fitted on the outside of one side end of the valve core tube 12. The outer valve sleeve 14 is threaded to the outside of the valve core tube 12 and is tightly attached to the outside of the rubber sleeve 13. The high-pressure hose 3 is clamped and fixed to the outside of the outer valve sleeve 14, and the side end of the valve core tube 12 and the rubber sleeve 13 are arranged inside the high-pressure hose 3.

[0017] The valve core tube 12 is composed of a variable diameter inner sleeve 15, a valve sleeve connecting thread 16, and a pump set connecting end 17. The pump set connecting end 17 is located at the side end of the variable diameter inner sleeve 15. The valve sleeve connecting thread 16 is located on the outside of the side end of the variable diameter inner sleeve 15. The outer valve sleeve 14 is correspondingly provided with a valve sleeve connecting thread 16 inside. The valve sleeve connecting thread 16 on the outer valve sleeve 14 and the valve sleeve connecting thread 16 on the variable diameter inner sleeve 15 are connected accordingly. A discharge port 18 is opened on the outer side of the side end of the variable diameter inner sleeve 15. The rubber sleeve 13 is sleeved on the outside of the variable diameter inner sleeve 15 and the rubber sleeve 13 seals the outside of the discharge port 18.

[0018] The grouting method using the single-hole deep-shallow layered grouting device of this invention is as follows: First, check the development of surface cracks in the surrounding rock of the area to be grouted. If cracks appear on the surface of the surrounding rock, spray a 30-50mm layer of concrete wall to seal the surface cracks. Then, according to the cross-sectional dimensions of the tunnel, evenly arrange and drill a row of grouting holes. Place the annular bag 2 on the outside of the two grouting pipe fixing rings 7. Pass the high-pressure hose 3 through the grouting pipe fixing rings 7 and the movable clamping ring 8, and connect it to the annular bag 2. Connect the outside of the high-pressure hose 3 to the grout anti-reverse structure 4. After the grouting pipe 1 is assembled, insert the grouting pipe 1 into the grouting hole. Connect the grout anti-reverse structure 4 to the grouting pump group mechanism through the thread. Open the grouting pump group mechanism and fill the annular bag 2 with concrete grout. Excess water permeates through the annular bag 2 to the outside of the bag, forming an isolation layer at the 1 / 2 to 3 / 4 position of the deep grouting pipe.

[0019] By drilling a row of grouting holes, segmented grouting is achieved in the shallow and deep areas of the surrounding rock fissures. This ensures full utilization of the grouting holes and avoids excessive grouting pressure, which could prevent the grout from penetrating into the deep areas of the surrounding rock fissures and instead cause it to flow out from the surface of the surrounding rock or the borehole of the grouting hole, thus reducing the grouting effect of the surrounding rock fissures in the roadway. Generally, this grouting method has a wider grouting range than single-hole grouting.

[0020] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A single-hole deep and shallow layered grouting device, characterized in that, The utility model provides a grouting pipe (1), annular bag (2), high pressure hose (3), slurry check structure (4), bag fixing structure (5), bag fixing structure (5) is arranged in parallel on the outside of grouting pipe (1), annular bag (2) is covered in the outside of grouting pipe (1), and the side end of annular bag (2) is fixed on grouting pipe (1) through two groups of bag fixing structure (5), slurry check structure (4) is connected in the side end of high pressure hose (3), and the other side end of high pressure hose (3) passes through bag fixing structure (5) and is communicated with annular bag (2).

2. The single-hole deep-shallow layered grouting device according to claim 1, characterized in that, The side end of annular bag (2) is provided with annular fixed edge (6), bag fixing structure (5) is composed of grouting pipe fixing ring (7), movable clamp ring (8), fixed bolt (9), grouting pipe fixing ring (7) is fixed in parallel on grouting pipe (1), movable clamp ring (8) is provided with two groups, and the two groups of movable clamp ring (8) are symmetrically arranged on the outside of two groups of grouting pipe fixing ring (7), grouting pipe fixing ring (7) and movable clamp ring (8) are provided with fixed screw hole (10) correspondingly, annular fixed edge (6) is arranged between grouting pipe fixing ring (7) and movable clamp ring (8), fixed bolt (9) is correspondingly fixed on grouting pipe fixing ring (7) and movable clamp ring (8), and the grouting pipe fixing ring (7) and movable clamp ring (8) of one side are provided with corresponding pipeline perforation (11), and the pipeline perforation (11) is communicated with the inside of annular bag (2), and the side end of high pressure hose (3) is arranged in the pipeline perforation (11).

3. The single-hole deep-shallow layered grouting device according to claim 1, characterized in that, The slurry check structure (4) is composed of a valve core pipe (12), a rubber sleeve (13), and an outer valve sleeve (14). The rubber sleeve (13) is sleeved on the outside of one side end of the valve core pipe (12). The outer valve sleeve (14) is threadedly connected to the outside of the valve core pipe (12), and the outer valve sleeve (14) is tightly attached to the outside of the rubber sleeve (13). The high-pressure hose (3) is clamped and fixed to the outside of the outer valve sleeve (14), and the side end of the valve core pipe (12) and the rubber sleeve (13) are arranged in the high-pressure hose (3).

4. The single-hole deep-shallow layered grouting device according to claim 3, characterized in that, The valve core pipe (12) is composed of a variable-diameter inner sleeve (15), a valve sleeve connection thread (16), and a pump group connection end (17). The pump group connection end (17) is arranged at the side end of the variable-diameter inner sleeve (15). The valve sleeve connection thread (16) is arranged on the outside of the side end of the variable-diameter inner sleeve (15). The inside of the outer valve sleeve (14) is correspondingly provided with the valve sleeve connection thread (16). The valve sleeve connection thread (16) on the outer valve sleeve (14) is correspondingly connected with the valve sleeve connection thread (16) on the variable-diameter inner sleeve (15). The outside of the side end of the variable-diameter inner sleeve (15) is provided with a drainage port (18). The rubber sleeve (13) is sleeved on the outside of the variable-diameter inner sleeve (15), and the rubber sleeve (13) seals the outside of the drainage port (18).

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