Bag type grouting hole sealing device based on automatic regulation and control of semipermeable membrane permeation slurry concentration

Abstract

The utility model belongs to the technical field of blasting and hole sealing of underground roadways of coal mines, and discloses a bag type grouting and hole sealing device based on automatic regulation and control of the concentration of permeable slurry of a semi-permeable membrane. Comprising a shell, a blasting pipeline, a semi-permeable membrane grouting bag, a grout outlet pipe, a grouting pipe, a grouting hole sealing section, a one-way valve and a grout return pipe. A blasting pipeline is arranged in the shell, the blasting pipeline is inserted into the grouting hole sealing section, the semi-permeable membrane grouting bag comprises a semi-permeable membrane grouting bag a and a semi-permeable membrane grouting bag b, and the semi-permeable membrane grouting bag a and the semi-permeable membrane grouting bag b are both installed on the blasting pipeline; the slurry outlet pipe is communicated with the semi-permeable membrane grouting bag a and the grouting hole sealing section; the grouting pipe comprises a grouting pipe a and a grouting pipe b, the grouting pipe b is communicated with the semi-permeable membrane grouting bag a, and the grouting pipe a is communicated with an external grouting device and the semi-permeable membrane grouting bag a; one end of the slurry return pipe is inserted into the grouting hole sealing section and the other end extends out of the shell. The water-cement ratio of grout is guaranteed through the semi-permeable membrane grouting bag, and the hole sealing quality and the mine safety level are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal mine underground roadway blasting hole sealing technical field, concretely relates to a kind of bag type grouting hole sealing device based on semi-permeable membrane permeation slurry concentration automatic regulation and control. BACKGROUND

[0002] In the coal mine underground roadway support and disaster prevention engineering, hole sealing technology is the key link to ensure the sealing of borehole and the stability of surrounding rock. The widely used blasting hole sealing process mainly forms slurry by mixing water and cement material and injects it into the borehole, and uses the sealing layer formed after solidification to achieve plugging. The core of this process is to accurately control the water-cement ratio to ensure that the slurry has appropriate fluidity and solidification strength. However, the underground working environment is complex and changeable, with problems such as narrow space, large humidity fluctuation and serious dust interference, making it difficult to stabilize and control the water-cement ratio in actual construction. Due to the limitations of on-site conditions or lack of experience, the grouting ratio often deviates from the design value, resulting in a significant decrease in slurry concentration.

[0003] Insufficient slurry concentration can cause problems: on the one hand, when the volume of the capsule bag is filled with slurry, there is still a calculated part of the slurry that has not been filled, causing waste; on the other hand, the solidification time is greatly extended or even local non-solidification occurs, making the strength of the hole sealing capsule unable to meet the design requirements. More seriously, in subsequent blasting operations, the weak sealing layer is easily impacted by dynamic load, causing "punching" phenomenon - the sealing layer breaks and the slurry back-flows, causing the surrounding coal and rock mass to loosen, inducing roof collapse and other major safety accidents.

[0004] A mine anti-pressure coal seam grouting hole sealer is disclosed in Chinese patent CN215718611U, which includes a body, a rubber layer, an inflation conduit, an exhaust conduit, and a grouting conduit. The body has a fixed box installed on one side, and a coiled hose is arranged in the fixed box. The coiled hose is connected to the grouting conduit. Two fixed side shells are installed in the fixed box, with one side of each fixed side shell being open. A ball screw is rotatably arranged in each fixed side shell, with the screw threads at both ends of the ball screw being symmetrically arranged along the middle part. Two adjusting sleeves are threadedly connected to the ends of the ball screw. Two rotating rods are rotatably installed on the adjusting sleeves. Four rotating rods are rotatably connected to a limiting shell. A belt is rotatably installed on the limiting shell. The end of the coiled hose away from the grouting conduit slides through the side of the fixed box. The above-mentioned device cannot control the water-cement ratio of the slurry, and it cannot observe whether the grouting work is completed. Therefore, it is urgent for technical personnel in the field to solve the above-mentioned technical problems. UTILITY MODEL CONTENTS

[0005] The utility model is to solve the problem in the prior art that the water-cement ratio of the slurry cannot be controlled, and the completion of the grouting work cannot be observed.

[0006] The technical solution adopted by the utility model is:

[0007] A kind of based on semi-permeable membrane permeation slurry concentration automatic regulation's bag type grouting hole sealing device, for the grouting closure of coal seam blast hole, including shell, blast pipeline, semi-permeable membrane grouting bag, out of slurry pipe, grouting pipe, grouting hole sealing section, check valve and return slurry pipe;

[0008] The shell is provided with the blast pipeline, and the blast pipeline is inserted in the grouting hole sealing section;

[0009] The semi-permeable membrane grouting bag includes semi-permeable membrane grouting bag a and semi-permeable membrane grouting bag b, and the semi-permeable membrane grouting bag a and the semi-permeable membrane grouting bag b are installed on the blast pipeline;

[0010] The out of slurry pipe is communicated with the semi-permeable membrane grouting bag a and the grouting hole sealing section;

[0011] The grouting pipe includes grouting pipe a and grouting pipe b, and the grouting pipe b is communicated with the semi-permeable membrane grouting bag b, and the grouting pipe a is communicated with external grouting device and the semi-permeable membrane grouting bag a;

[0012] One end of the return slurry pipe is inserted into the grouting hole sealing section, and the other end protrudes out of the shell.

[0013] By using the above technical scheme, the water-cement ratio in the slurry can be accurately controlled by using the semi-permeable membrane grouting bag. This is crucial for ensuring the flowability of the slurry and the strength after hardening, thereby improving the quality of the hole sealing. Due to the characteristics of the semi-permeable membrane, the slurry can be more evenly distributed in the coal seam blast hole, reducing voids and unevenness, further enhancing the hole sealing effect. High-quality hole sealing can effectively prevent gas leakage and the escape of other harmful gases, improving the safety of the working environment. Good hole sealing helps to stabilize the coal seam structure and reduce the risk of geological disasters caused by blasting operations. The device is reasonably designed, the components are tightly connected and easy to disassemble and inspect, facilitating daily maintenance. By setting check valves, stop valves and other components, the grouting process can be flexibly adjusted according to actual needs, ensuring smooth operation.

[0014] Further, one-way valves are installed on the out of slurry pipe and the grouting pipe a, the one-way valve of the out of slurry pipe is installed in the semi-permeable membrane grouting bag a, and the one-way valve of the grouting pipe a is installed in the grouting hole sealing section.

[0015] By adopting the above technical scheme, the one-way valve can effectively prevent the backflow of slurry or gas, ensuring that the slurry can only flow in one direction during the grouting process. This not only avoids the problem of pipeline blockage caused by backflow, but also reduces the potential damage to the equipment. By preventing the backflow of slurry to the external grouting device or other parts, environmental pollution can be avoided, especially when working in sensitive areas. The presence of the one-way valve ensures that the slurry flows smoothly from the grouting device to the target location, reducing unnecessary pressure loss and improving the efficiency of the entire grouting process. Installing the one-way valve in the semi-permeable membrane grouting bag helps to more accurately control the speed and amount of slurry entering the coal seam blast hole, ensuring that the slurry fills the pores more uniformly and improves the sealing quality. Setting the one-way valve in the grouting and sealing section helps to maintain the pressure balance of the system, preventing operational errors or equipment failures caused by pressure fluctuations, and ensuring stable operation of the entire system.

[0016] Further, one end of the grouting pipe a located outside the shell is also provided with a stop valve, and one end of the grouting pipe b located outside the shell is also provided with the stop valve.

[0017] By adopting the above technical scheme, the stop valve provided for each grouting pipe allows the operator to independently control the flow of slurry in each pipeline. This means that specific grouting paths can be opened or closed without interrupting other grouting processes. By adjusting the opening degree of the stop valve on different grouting pipes, the pressure and flow rate of each grouting point can be more accurately controlled, achieving more uniform and effective grouting filling. When a part of the pipeline or equipment needs to be inspected and repaired, the corresponding stop valve can be closed to isolate this part of the system, allowing maintenance work to be carried out without stopping, improving maintenance efficiency.

[0018] Further, a straight plug joint is arranged between the bottom of the semi-permeable membrane grouting bag b and the grouting and sealing section, and the grouting pipe a and the slurry return pipe are plugged into the straight plug joint.

[0019] By adopting the above technical scheme, the design of the straight plug joint allows the grouting pipe and the slurry return pipe to be quickly and accurately connected to the bag, without the need for complex assembly processes, greatly improving the efficiency of on-site construction. The steps involved in traditional threaded connection, such as tightening and alignment, are reduced, reducing the difficulty of operation. Even non-professionals can easily complete the installation. The straight plug joint is usually in the form of a tight fit or with a locking device, ensuring the stability of the connection and effectively preventing loosening or leakage problems caused by external vibration or internal pressure changes.

[0020] Further, a drill hole is arranged at the end of the shell, and the drill hole is in communication with the grouting and sealing section.

[0021] By adopting the technical scheme, the slurry is directly guided to the predetermined position (i.e. the blasting hole of the coal seam) through the drilling, the accurate grouting of the specific area can be realized, the utilization efficiency and grouting effect of the slurry are improved, the uniform distribution of the slurry in the blasting hole is ensured, the cracks or gaps are effectively filled, the stability of the rock stratum or coal seam is enhanced, and the collapse risk in the subsequent mining process is reduced.

[0022] Further, the blasting pipeline is formed by connecting two pipeline sections, and a pipeline joint is arranged at the connection position of the pipeline sections, and the pipeline joint is fixed by a clamp.

[0023] By adopting the technical scheme, the pipeline joint can ensure the tight connection between the two pipeline sections, and the gas or liquid leakage caused by the loose connection is avoided. Especially in a high-pressure environment, good sealing performance is particularly important. The pipeline joint is fixed by a clamp, which can provide additional mechanical support for the pipeline joint, enhance the structural stability of the entire system, reduce the risk of loosening caused by external vibration or impact, and make the disassembly and reinstallation of the pipeline joint simple and fast without the need for complex tools or skills, greatly improving the work efficiency. Once the system fails, the faulty part can be quickly located and replaced without the need to replace the entire pipeline system, reducing maintenance costs and time consumption.

[0024] The utility model has the advantages of the following beneficial effects:

[0025] 1. The utility model discloses a semi-permeable membrane grouting bag is used to accurately control the water-cement ratio of slurry, and the water-cement ratio can be accurately controlled to ensure that the slurry has appropriate fluidity and curing strength, improve the hole sealing quality, and the high-quality hole sealing not only enhances the structural stability, but also reduces the risk of coal and rock body loosening around the drilling hole caused by the slurry backflow due to the rupture of the sealing layer caused by blasting operation.

[0026] 2. The utility model discloses a one-way valve, a stop valve and a straight plug joint, which ensure that the slurry can only flow in one direction before the grouting work is completed, avoid the pipeline blockage problem caused by backflow, and reduce the potential damage to the equipment. Whether the return slurry pipe overflows or not can quickly judge whether the grouting work is introduced or not.

[0027] 3. The utility model discloses a pipeline joint and a clamp, which simplify the installation and disassembly process, and can be completed without complex tools or skills, enhance the sealing performance and mechanical strength of the connection position, and the application of the straight plug joint further speeds up the on-site construction speed and reduces the operation difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 is the installation schematic diagram of the utility model when working on the coal seam;

[0030] Figure 3 is the enlarged schematic diagram of A part in the utility model Figure 1

[0031] Wherein: 1-blasting pipeline; 2-semipermeable membrane grouting bag a; 3-grouting pipe; 4-clip; 5-pipeline joint; 6-grouting pipe b; 7-grouting pipe a; 8-one-way valve; 9-grouting hole sealing section; 10-straight insertion joint; 11-semipermeable membrane grouting bag b; 12-drilling hole; 13-stop valve; 14-return grouting pipe; 15-housing. DETAILED DESCRIPTION

[0032] The utility model will be further explained in detail in combination with the drawings and specific preferred embodiments.

[0033] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "left side", "right side", "upper part", "lower part" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, so it cannot be understood as a limitation on the utility model. The specific size adopted in the embodiment is only for the purpose of illustrating the technical scheme, and does not limit the protection scope of the utility model.

[0034] Referring to Figure 1 , Figure 2 and Figure 3 , it can be known that the utility model discloses a kind of bag type grouting hole sealing devices based on semi-permeable membrane permeation slurry concentration automatic regulation and control, the device includes housing 15, blasting pipeline 1, semi-permeable membrane grouting bag a 2, semi-permeable membrane grouting bag b 11, grouting pipe 3, grouting pipe a 7, grouting pipe b 6, grouting hole sealing section 9, one-way valve 8, return grouting pipe 14, straight insertion joint 10, drilling hole 12 and pipeline joint 5;Housing 15 is provided with blasting pipeline 1, and blasting pipeline 1 is connected by pipeline joint 5 and is fixed by clip 4, and its end is inserted into grouting hole sealing section 9;Semi-permeable membrane grouting bag a 2 and semi-permeable membrane grouting bag b 11 are sleeved on blasting pipeline 1, grouting pipe a 7 one end connects external grouting device, other end is communicated semi-permeable membrane grouting bag a 2 by straight insertion joint 10, grouting pipe b 6 is communicated semi-permeable membrane grouting bag b 11 with grouting hole sealing section 9, grouting pipe 3 is communicated semi-permeable membrane grouting bag a 2 with grouting hole sealing section 9, return grouting pipe 14 one end is inserted into grouting hole sealing section 9, other end extends to the outside of housing 15;One-way valve 8 is respectively installed on grouting pipe a 7, grouting pipe b 6 and grouting pipe 3, and grouting pipe a 7 and grouting pipe b 6 are provided with stop valve 13, and grouting hole sealing section 9 is communicated with drilling hole 12.​

[0035] In use, first, the entire device is aligned with the pre-drilled coal seam blasting hole, and the device is fixed as a whole through the stone buried shell 15, ensuring that the position is accurate, and the drilling hole 12 of the device is aligned with the coal seam blasting hole. Next, the grouting pump is used to grout the semi-permeable membrane grouting bag b11 through the grouting pipe b6. The grouting pump should be adjusted to an appropriate pressure and flow rate to ensure that the slurry can uniformly fill the semi-permeable membrane grouting bag b11 and make it gradually expand until the semi-permeable membrane grouting bag b11 is completely filled with slurry. At this time, the grouting pump is immediately stopped to prevent excessive grouting from causing equipment damage or poor results.

[0036] Subsequently, the grouting pipe 3 of the grouting pump is switched to the grouting pipe a7, and grouting of the semi-permeable membrane grouting bag a2 is started. As the slurry is continuously injected, the semi-permeable membrane grouting bag a2 will also gradually expand. When the semi-permeable membrane grouting bag a2 reaches a saturated state, the built-in one-way valve 8 automatically opens, and the slurry flows into the grouting hole sealing section 9. Continue grouting until the entire grouting hole sealing section is fully filled with slurry, and finally when the return pipe 14 is observed to have slurry flowing out, it indicates that the grouting operation has been successfully completed, and the grouting pump can be turned off and the related equipment can be removed.

[0037] Working principle: External slurry is injected into the semi-permeable membrane grouting bag a2 through the grouting pipe a7, and the slurry flows into the grouting hole sealing section 9 under pressure, and the slurry that does not meet the specified water-cement ratio penetrates into the shell 15 through the semi-permeable membrane; the grouting pipe b6 delivers part of the slurry to the semi-permeable membrane grouting bag b11, further adjusting the grouting pressure and penetration rate; the one-way valve 8 ensures one-way flow of the slurry to prevent backflow contamination of the pipeline, and the stop valve 13 controls the start and stop of grouting; the return pipe 14 recovers excess slurry in the grouting hole sealing section 9, maintaining system pressure balance; the blasting pipeline 1 penetrates the device to ensure that coal seam blasting can be performed after grouting is completed, and the straight insertion joint 10 and the clamp 4 ensure the sealing of the pipeline connection.

[0038] The preferred embodiments of the utility model are described in detail above, but the utility model is not limited to the specific details in the above embodiments, and various equivalent transformations of the technical solutions of the utility model can be made within the technical concept of the utility model, and these equivalent transformations all belong to the protection scope of the utility model.

Claims

1. A kind of based on semi-permeable membrane permeation slurry concentration automatic regulation and control bag type grouting hole sealing device, for the grouting of coal seam blasting pipeline, it is characterized by: The shell (15), the blasting pipeline (1), the semi-permeable membrane grouting bag, the grouting pipe (3), the grouting pipe, the grouting hole sealing section (9), the one-way valve (8) and the grouting return pipe (14) are included. The blasting pipeline (1) is arranged in the shell (15) and is inserted in the grouting hole sealing section (9). The semi-permeable membrane grouting bag includes a semi-permeable membrane grouting bag a (2) and a semi-permeable membrane grouting bag b (11), and the semi-permeable membrane grouting bag a (2) and the semi-permeable membrane grouting bag b (11) are both arranged on the blasting pipeline (1). The grouting pipe (3) is connected with the semi-permeable membrane grouting bag a (2) and the grouting hole sealing section (9). The grouting pipe includes a grouting pipe a (7) and a grouting pipe b (6), the grouting pipe b (6) is connected with the semi-permeable membrane grouting bag b (11), and the grouting pipe a (7) is connected with an external grouting device and the semi-permeable membrane grouting bag a (2). One end of the grouting return pipe (14) is inserted into the grouting hole sealing section (9), and the other end of the grouting return pipe (14) is arranged outside the shell (15).

2. The capsule bag type grouting hole sealing device based on the automatic regulation of the semi-permeable membrane permeation slurry concentration according to claim 1, characterized in that: The one-way valve (8) is arranged on the grouting pipe (3) and the grouting pipe a (7), the one-way valve (8) of the grouting pipe (3) is arranged in the semi-permeable membrane grouting bag a (2), and the one-way valve (8) of the grouting pipe a (7) is arranged in the grouting hole sealing section (9).

3. The capsule bag type grouting hole sealing device based on the automatic regulation of the semi-permeable membrane permeate slurry concentration according to claim 2, characterized in that: The grouting pipe a (7) is arranged with a stop valve (13) at one end outside the shell (15), and the grouting pipe b (6) is also arranged with the stop valve (13) at one end outside the shell (15).

4. The capsule bag type grouting hole sealing device based on the automatic regulation of the semi-permeable membrane permeate slurry concentration according to claim 3, characterized in that: The semi-permeable membrane grouting bag b (11) is arranged with a straight insertion joint (10) between the bottom of the semi-permeable membrane grouting bag b (11) and the grouting hole sealing section (9), and the grouting pipe a (7) and the grouting return pipe (14) are inserted into the straight insertion joint (10).

5. The semi-permeable membrane based on the osmotic concentration of the slurry automatic regulation of the bag type grouting hole sealing device according to claim 1, characterized in that: The shell (15) is arranged with a drill hole (12) at the end of the shell (15), and the drill hole (12) is connected with the grouting hole sealing section (9).

6. The semi-permeable membrane based on the osmotic concentration of the slurry automatic regulation of the bag type grouting hole sealing device according to claim 1, characterized in that: The blasting pipeline (1) is connected by two pipelines, and the pipeline joint (5) is arranged at the connection of the pipelines, and the pipeline joint (5) is fixed by the clamp (4).

Images