A grouting exhaust device and exhaust method for a pipe hole directly connected to a water-filled goaf area

Abstract

The present invention provides a grouting exhaust device and an exhaust method of a pipe hole directly connected to a water-filled goaf area, which belongs to the technical field of grouting management of goaf areas. The exhaust device includes: a first exhaust pipe, a first valve, a second exhaust pipe and a second valve; the grouting of the water-filled goaf area adopts a direct connection method of the grouting pipe and the orifice pipe, the first exhaust pipe and the second exhaust pipe connect the grouting borehole with the grouting pipe, two exhaust ports are arranged on the exhaust device, and sufficient air storage space is formed between the exhaust pipe and the exhaust port, during the grouting process, the air in the borehole can be gradually discharged, and there is no need to lower the grouting pipe through the borehole to the goaf area at the bottom of the hole, so that the grouting pipe and the grouting borehole can be ensured to be in a full pipe continuous conveying state, which can achieve the effect of large-flow rapid grouting, eliminate the steps of repeatedly lowering and recovering the grouting pipeline, simplify the grouting process flow, and improve the grouting efficiency; the exhaust device is reusable, saves the production cost of the grouting pipe in the hole, and reduces the construction cost.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting treatment of goaf areas, and particularly relates to a pipe hole direct-connected grouting exhaust device and an exhaust method for a water-filled goaf area. Background Art

[0002] Goaf is a "void" created by man-made excavation or natural geological movement under the surface. Generally, cement, fly ash, water and other materials are used to prepare a certain proportion of slurry. The slurry with a certain flow rate and pressure is injected into the goaf through a delivery pump. Grouting treatment of goaf, such as Figure 3 However, the hydrogeological conditions of the goaf are different. Some goafs have no water or little water, while some goafs are full of water. Therefore, it is necessary to drill holes on the ground to obtain the water level of the goaf, such as Figure 4 When the ground in the goaf needs to be utilized, grouting treatment is generally required based on the conditions of the goaf to improve the stability of the ground surface in the utilized area.

[0003] For grouting in goaf without water or not full of water, the ground grouting pipe is usually directly connected to the grouting borehole orifice pipe. Since there is no water in the borehole, the slurry reaches the goaf in the form of free fall at the orifice and gradually fills the goaf. The ground grouting pipe is directly connected to the borehole orifice pipe, such as Figure 5 As shown. However, for grouting in water-filled goafs, since there is a certain water level in the borehole, the grouting pipe is generally lowered directly into the goaf through the grouting borehole, and the slurry and pressure are transmitted through the pipeline. However, grouting drilling generally adopts intermittent grouting. During the interval, the grouting effect needs to be observed by lowering the observation equipment through the borehole, and the grouting pipe needs to be repeatedly lowered and recovered. When the number of boreholes is large and the depth is large, it is necessary to make multiple grouting pipelines and lower them through the boreholes to the goaf at the bottom of the hole. Large lifting equipment is required to cooperate with the construction. The process is complicated, the efficiency is low, and the amount of pipes used is large and the cost is high. The pipeline layout is as follows Figure 6 shown. Summary of the Invention

[0004] In order to solve the problems existing in the above-mentioned prior art, when grouting a hole is intermittently grouting, it is necessary to lower the observation equipment through the borehole to observe the grouting effect during the interval, and the grouting pipeline needs to be repeatedly lowered and recovered, which results in complex process, low efficiency, and large amount of pipe material used. The present invention provides a grouting exhaust device and exhaust method directly connected to the pipe hole in the water-filled goaf area. By adopting a method of directly connecting the grouting pipe and the orifice pipe, two exhaust ports are arranged on the exhaust device, and sufficient air storage space is formed between the exhaust pipe and the exhaust port. During the grouting process, the air in the borehole can be gradually discharged, instead of lowering the grouting pipe through the borehole into the goaf for grouting, the steps of repeatedly lowering and recovering the grouting pipeline are omitted, the grouting process is simplified, and the grouting efficiency is improved. Its specific technical solution is as follows:

[0005] A grouting exhaust device with direct connection to a pipe hole in a water-filled goaf area, the exhaust device is arranged on the grouting borehole, and the exhaust device includes: a first exhaust pipe, a first valve, a second exhaust pipe and a second valve; the first exhaust pipe is connected to the grouting borehole, a first exhaust port is provided on the side wall of the first exhaust pipe, and the first exhaust port extends in a direction away from the first exhaust pipe; the first valve is provided on the first exhaust pipe; the second exhaust pipe is connected to the first exhaust pipe, the second exhaust pipe is connected to the grouting pipe, a second exhaust port is provided on the second exhaust pipe, and the exhaust port extends in a direction away from the second exhaust pipe; the second valve is provided on the second exhaust port.

[0006] In addition, the water-filled goaf area pipe hole direct-connected grouting exhaust device in the above technical solution provided by the present invention may also have the following additional technical features:

[0007] Optionally, the exhaust device further includes: an orifice pipe; one end of the orifice pipe is embedded in the grouting borehole, and the other end of the orifice pipe is connected to the first exhaust pipe.

[0008] Optionally, the inner diameters of the first exhaust pipe, the second exhaust pipe and the orifice pipe are equal.

[0009] Optionally, the exhaust device further includes: a first guide pipe; the first guide pipe is connected to the first valve.

[0010] Optionally, the discharge end of the first guide tube is bent downward.

[0011] Optionally, the first exhaust pipe includes: a guide section and an air storage portion; the guide section is arranged along the axial direction of the grouting borehole; at least one air storage portion is arranged on the side of the guide section, the air storage portion extends in a direction away from the guide section, and an air storage space is formed between the air storage portion and the guide section; wherein, the first exhaust pipe is arranged on the air storage portion.

[0012] Optionally, the second exhaust port is arranged vertically upward.

[0013] Optionally, the exhaust device further includes: a second guide pipe; the second guide pipe is connected to the second valve, and the discharge end of the second guide pipe is bent downward.

[0014] On the other hand, the present application provides a method for direct-connected grouting exhaust in a water-filled goaf area, the exhaust method comprising: installing an exhaust device to connect the exhaust device to the grouting borehole and the grouting pipe; opening a first valve and a second valve; controlling a delivery pump to perform multiple intermittent grouting; and closing the delivery pump, the first valve, and the second valve when the grouting is stable.

[0015] Optionally, the exhaust method further includes: after closing the first valve and the second valve each time, removing the first guide tube and the second guide tube, and cleaning the valves and the guide tube.

[0016] Compared with the prior art, the present invention provides a water-filled goaf area pipe hole direct-connected grouting exhaust device and exhaust method, which has the following beneficial effects:

[0017] Grouting in a water-filled goaf area uses a method of directly connecting the grouting pipe and the orifice pipe. The first exhaust pipe and the second exhaust pipe connect the grouting borehole to the grouting pipe. Two exhaust ports are arranged on the exhaust device, and sufficient air storage space is formed between the exhaust pipe and the exhaust port. During the grouting process, the air in the borehole can be gradually discharged. There is no need to lower the grouting pipe through the borehole to the goaf at the bottom of the hole. This can ensure that the grouting pipe and the grouting borehole are in a full pipe continuous conveying state, which can achieve the effect of high-flow rapid grouting. Instead of lowering the grouting pipe through the borehole to the goaf for grouting, the grouting pipe is repeatedly lowered and recovered, simplifying the grouting process and improving grouting efficiency. Moreover, the exhaust device is reusable. For boreholes with a large burial depth and a large number of boreholes, there is no need to prepare and lower the grouting pipe according to the number of boreholes. The exhaust device can be repeatedly disassembled and assembled to grout multiple and deep boreholes, saving the amount of grouting pipe material in the hole, eliminating the cost of making the grouting pipe, and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a connection method of a pipe hole direct-connected grouting exhaust device in a water-filled goaf area according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of a pipe hole direct-connected grouting exhaust device in a water-filled goaf area according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the surface grouting system for goaf grouting;

[0021] Figure 4 This is a schematic diagram of the water-filled goaf;

[0022] Figure 5 This is a schematic diagram of the connection method of the grouting pipeline in the goaf without water or not fully watered;

[0023] Figure 6 This is a schematic diagram of the grouting pipeline connection method in the water-filled goaf area;

[0024] in, Figures 1 to 2 The corresponding relationship between the reference numerals and component names is as follows:

[0025] 10. Grouting pipe; 11. Grouting drill hole; 12. First exhaust pipe; 121. Diversion section; 122. Gas storage section; 13. First valve; 14. Second exhaust pipe; 15. Second valve; 16. Orifice pipe; 17. First guide pipe; 18. Second guide pipe; 19. Thread; 20. Gas storage space. DETAILED DESCRIPTION

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] See also Figure 1-Figure 2As shown, according to an embodiment of the present application, a grouting exhaust device with a direct connection to a pipe hole in a water-filled goaf area is provided. A grouting exhaust device with a direct connection to a pipe hole in a water-filled goaf area is provided. The exhaust device is arranged on a grouting borehole 11, and the exhaust device includes: a first exhaust pipe 12, a first valve 13, a second exhaust pipe 14 and a second valve 15; the first exhaust pipe 12 is connected to the grouting borehole 11, and a first exhaust port is provided on the side wall of the first exhaust pipe 12, and the first exhaust port extends in a direction away from the first exhaust pipe 12; the first valve 13 is provided on the first exhaust pipe 12; the second exhaust pipe 14 is connected to the first exhaust pipe 12, and the second exhaust pipe 14 is connected to the grouting pipe 10, and a second exhaust port is provided on the second exhaust pipe 14, and the exhaust port extends in a direction away from the second exhaust pipe 14; the second valve 15 is provided on the second exhaust port. By extending the first exhaust port in a direction away from the first exhaust pipe 12, the air storage space 20 in front of the first exhaust port is increased; a second exhaust pipe 14 is provided in front of the second exhaust port as the air storage space 20, which facilitates the exhaust of air, ensuring that the grouting pipe 10 and the grouting borehole 11 are in a full pipe state, which can achieve large-flow transportation, stable pressure transmission, and efficient transportation. The first exhaust pipe 12 and the second exhaust pipe 14 connect the grouting borehole 11 with the grouting pipe 10, and two exhaust ports are arranged on the exhaust device. As the grouting process progresses, the air in the borehole is gradually exhausted. There is no need to lower the grouting pipe 10 into the goaf, which can ensure that the grouting pipe 10 and the grouting borehole 11 are in a full pipe continuous transportation state, which can achieve the effect of large-flow rapid grouting, eliminate the steps of repeatedly lowering and recovering the grouting pipe 10, simplify the grouting process, and improve the grouting efficiency. For boreholes with a large burial depth and a large number of them, there is no need to make lowered grouting pipes 10 according to the number of boreholes. Grouting of multiple and deep boreholes can be carried out only by repeatedly disassembling and assembling the exhaust device, which saves the material consumption of the grouting pipes 10 in the holes, eliminates the production cost of the grouting pipes 10, and reduces the construction cost.

[0031] Furthermore, the second exhaust port is arranged at the top of the second exhaust pipe 14, and the first exhaust port and the second exhaust port have different directions, which can not only improve the exhaust efficiency, but also reduce the residual air in the exhaust device, which is beneficial to the exhaust of air between the grouting pipe 10 and the grouting borehole 11, so as to ensure that the delivery pump quickly transfers the pressure to the goaf, thereby achieving the effect of large-flow and efficient grouting.

[0032] Furthermore, the first exhaust port is arranged on the side of the grouting pipe 10 where the slurry comes from, that is, the first exhaust port faces the slurry making system. If the slurry is carried out during exhaust, the ejected slurry can be transported back to the slurry making system through an external pipeline, saving costs, reducing waste, and facilitating centralized management.

[0033] Specifically, the first exhaust pipe 12 adopts a four-way pipe, and the second exhaust pipe 14 adopts a three-way pipe, which has a common structure and is easy to obtain and facilitate subsequent maintenance or replacement.

[0034] As an embodiment, one end of the orifice tube 16 is embedded in the grouting borehole 11, and the other end of the orifice tube 16 is connected to the first exhaust pipe 12. By providing the orifice tube 16 in the grouting borehole 11, the first exhaust pipe 12 is prevented from being dislodged during grouting, thereby ensuring the stability of the exhaust device installation; and the orifice tube 16 serves as a guide for drilling the grouting hole, thereby ensuring drilling efficiency.

[0035] The inner diameters of the first exhaust pipe 12, the second exhaust pipe 14, and the orifice pipe 16 are equal. By making the inner diameters of the first exhaust pipe 12, the second exhaust pipe 14, and the orifice pipe 16 the same, changes in the grouting pressure and flow rate within the pipes due to changes in the cross-sectional area of the pipes are avoided, ensuring stable transmission of the grouting pressure and guaranteeing delivery efficiency.

[0036] Furthermore, the inner diameters of the first exhaust pipe 12, the second exhaust pipe 14 and the orifice pipe 16 are consistent with the inner diameter of the grouting pipe 10, which further improves the consistency of the inner diameter of the pipeline, ensures the stability of grouting, facilitates the judgment of the air discharge situation, and timely controls the opening and closing of the first valve 13 and the second valve 15 to achieve multiple intermittent grouting, which is conducive to air discharge and ensures grouting efficiency.

[0037] Furthermore, the first exhaust pipe 12, the second exhaust pipe 14, the orifice pipe 16 and the grouting pipe 10 are connected by threads 19, so that the grouting pipe 10 and the borehole form a closed approximately equal-diameter pipeline (the drilling construction process generally requires that the aperture is reduced after the borehole enters the normal bedrock), thereby improving the sealing performance, ensuring the stability of the pressure in the pipeline, ensuring the grouting efficiency, and reducing the risk of grouting leakage and reducing waste.

[0038] As an embodiment, the first guide pipe 17 is connected to the first valve 13. By connecting the first guide pipe 17 to the first valve 13, the slurry carried by the exhaust gas can be discharged to a designated location for centralized treatment.

[0039] The discharge end of the first guide pipe 17 is bent downward. By bending the discharge end of the first guide pipe 17 downward, it is prevented that the high-pressure slurry is sprayed out and hurts people, thereby ensuring the safety of the grouting work.

[0040] As an embodiment, the guide section 121 is arranged along the axial direction of the grouting borehole 11; at least one air storage portion 122 is arranged on the side of the guide section 121, the air storage portion 122 extends in a direction away from the guide section 121, and an air storage space 20 is formed between the air storage portion 122 and the guide section 121; wherein, the first exhaust pipe 12 is arranged on the air storage portion 122. By arranging the guide section 121 along the axial direction of the grouting borehole 11, the slurry is guided, the slurry flows smoothly, and a sufficiently large straight section air storage space 20 is formed between the first exhaust pipe 12 and the second exhaust pipe 14 to facilitate air discharge and reduce residual air; by arranging the air storage part 122 on the side of the guide section 121, the air storage part 122 is connected to the guide section 121 and extends in the direction away from the guide section 121 to increase the air storage space 20 of the guide section 121. When grouting, the air will move into the air storage part 122, and the air's obstruction to the slurry is reduced, thereby transporting the slurry stably and at a large flow rate.

[0041] Furthermore, at least one gas storage portion 122 and a first exhaust pipe 12 are provided on the guide section 121 to ensure that there is sufficient gas storage space 20 .

[0042] Specifically, the first exhaust pipe 12 and the first valve 13 are not provided on the gas storage portion 122 of the guide section 121 away from the grouting pipe 10 , and the orientation of the first exhaust pipe 12 is unified, which is convenient for centralized management.

[0043] Furthermore, the height of the air storage part 122 does not exceed the diameter of the grouting pipe 10, so as to avoid the air storage part 122 being too large, resulting in the slurry easily gathering and solidifying after the first valve 13 is closed multiple times in the later stage of grouting, making it difficult to clean and reducing the exhaust effect.

[0044] As an embodiment, the second exhaust port is arranged vertically upward. By arranging the second exhaust port vertically upward, it is ensured that the air not exhausted from the first exhaust port flows unobstructed, which is conducive to exhausting the air and improving the grouting efficiency.

[0045] As an embodiment, the second guide pipe 18 is connected to the second valve 15, and the discharge end of the second guide pipe 18 is bent downward. By bending the discharge end of the second guide pipe 18 downward, high-pressure slurry is prevented from spraying out and injuring people, thereby ensuring the safety of the grouting work.

[0046] Another aspect of this embodiment provides a method for grouting and exhausting water in a water-filled goaf area by direct connection to a pipe hole. The exhaust method comprises: installing an exhaust device, connecting the exhaust device to the grouting borehole 11 and the grouting pipe 10; opening a first valve 13 and a second valve 15; controlling a delivery pump to perform multiple intermittent grouting; and when the grouting is stable, closing the delivery pump, the first valve 13, and the second valve 15. The first exhaust pipe 12 is connected to the orifice pipe 16 in the grouting borehole 11, and the grouting pipe 10 is then installed on the second exhaust pipe 14, so that the grouting pipe 10 and the borehole form a closed pipeline. The drilling grouting adopts multiple intermittent grouting. At the beginning of each grouting, the first valve 13 and the second valve 15 are opened and kept open; the delivery pump is turned on for multiple intermittent grouting. When the slurry is transported downward through the grouting pipe 10 and the borehole, the air in the borehole gradually rises, and at this time the first exhaust port and the second exhaust port discharge the air or the mixture of air and slurry; as the slurry gradually fills the borehole, the air is also gradually discharged. After the slurry is discharged stably and no mixture or gas is discharged from the first exhaust port and the second exhaust port, the first valve 13 and the second valve 15 are closed. After the air is discharged, the grouting pipe 10 and the borehole are in a full pipe continuous delivery state, which can achieve large flow delivery and stable pressure transmission.

[0047] Each time the first valve 13 and the second valve 15 are closed, the first guide tube 17 and the second guide tube 18 are removed and the valves and guide tubes are cleaned. Each time the first valve 13 and the second valve 15 are closed, and before the next grouting, the valves and guide tubes are promptly tilted to prevent slurry solidification from clogging the pipelines, thereby ensuring the patency of the pipelines, ensuring the stability of the pressure transmission during the next grouting, and ensuring the grouting efficiency. At the same time, the slurry is prevented from solidifying at the joints, making it difficult to disassemble the valves and guide tubes. This extends the service life of the exhaust device, facilitates its reuse, and reduces construction costs.

[0048] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0049] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A grouting exhaust device directly connected to a pipe hole in a water-filled goaf area, the exhaust device is arranged on a grouting borehole (11), characterized in that: The exhaust device comprises: a first exhaust pipe (12), the first exhaust pipe (12) being connected to the grouting borehole (11), a first exhaust port being provided on a side wall of the first exhaust pipe (12), the first exhaust port extending in a direction away from the first exhaust pipe (12); a first valve (13), the first valve (13) being arranged on the first exhaust pipe (12); a second exhaust pipe (14), the second exhaust pipe (14) being connected to the first exhaust pipe (12), the second exhaust pipe (14) being connected to the grouting pipe (10), the second exhaust pipe (14) being provided with a second exhaust port, the second exhaust port extending in a direction away from the second exhaust pipe (14); the second exhaust port being arranged vertically upward; a second valve (15), the second valve (15) being arranged on the second exhaust port; An orifice pipe (16), one end of the orifice pipe (16) is embedded in the grouting borehole (11), and the other end of the orifice pipe (16) is connected to the first exhaust pipe (12); The first exhaust pipe (12) comprises: A guide section (121), the guide section (121) being arranged along the axial direction of the grouting borehole (11); An air storage portion (122), at least one of the air storage portions (122) being arranged on a side of the flow guiding section (121), the air storage portion (122) extending in a direction away from the flow guiding section (121), and forming an air storage space (20) between the air storage portion (122) and the flow guiding section (121); Wherein, the first exhaust pipe (12) is arranged on the gas storage portion (122).

2. The grouting exhaust device for a water-filled goaf with a direct connection to a pipe hole according to claim 1, characterized in that: The first exhaust pipe (12), the second exhaust pipe (14) and the orifice pipe (16) have the same inner diameter.

3. The direct-connected grouting exhaust device for a water-filled goaf according to claim 1 is characterized in that: The exhaust device further comprises: A first guide tube (17), wherein the first guide tube (17) is connected to the first valve (13).

4. The direct-connected grouting exhaust device for a water-filled goaf according to claim 3 is characterized in that: The discharge end of the first guide tube (17) is bent downward.

5. The direct-connected grouting exhaust device for a water-filled goaf according to claim 1 is characterized in that: The exhaust device further comprises: A second guide tube (18), wherein the second guide tube (18) is connected to the second valve (15), and a discharge end of the second guide tube (18) is bent downward.

6. An exhaust method according to any one of claims 1 to 5, wherein the exhaust method is realized by the direct-connected grouting exhaust device for a water-filled goaf, characterized in that: The exhaust method comprises: Installing the exhaust device so that the exhaust device is in communication with the grouting borehole (11) and the grouting pipe (10); Opening the first valve (13) and the second valve (15); Control the delivery pump to perform multiple intermittent grouting; When the slurry discharge is stable, the delivery pump, the first valve (13) and the second valve (15) are closed.

7. The exhaust method implemented by the direct-connected grouting exhaust device for water-filled goaf according to claim 6 is characterized in that: The exhaust method further comprises: Each time the first valve (13) and the second valve (15) are closed, the first guide tube (17) and the second guide tube (18) are removed, and the valves and the guide tubes are cleaned.

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