Deep hole nonlinear grouting hole sealing device

Abstract

The utility model discloses a deep hole non-linear grouting hole sealing device which comprises a hole and further comprises a grouting stuffy disc, a steel cushion, a rock core pipe disc opening, a slurry return pipe A and a rock core barrel, the rock core barrel and the slurry return pipe A are connected in the hole, the rock core pipe disc opening is fixedly connected to the rock core barrel, the steel cushion is assembled on the rock core barrel, and the slurry return pipe A is fixedly connected to the rock core barrel. The grouting stuffy disc is fixedly connected with a disc opening of the rock core pipe through a bolt; according to the grouting device, the grouting efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hole sealing, and in particular relates to a deep hole nonlinear grouting hole sealing device. Background Art

[0002] Coal mining gradually extends to the deep strata. After entering deep mining, the tunnel surrounding rock roof presents the properties of soft rock (mostly mudstone), which is dense, brittle, with many sliding surfaces, poor self-stabilization ability and many faults, which are easy to cause accidents such as spalling and roof collapse, seriously affecting the safe production and social and economic benefits of coal mines. For the above problems, the drilling grouting process is usually used to reinforce the broken surrounding rock structure to improve the bearing capacity of the surrounding rock itself. Grouting is to inject the coagulated slurry into the voids (including pores and cracks) and cavities of the rock and soil through special grouting equipment and grouting pipelines. The slurry diffuses, solidifies and hardens, so that the fractured coal rock mass is cemented into a whole, thereby changing the mechanical properties of the rock and soil, reducing its permeability, and improving its strength and stability; at the same time, it works synergistically with other support means in the tunnel to reduce the burden on conventional support measures. At present, ordinary drilling rigs are usually used for drilling. However, due to the influence of drill bit droop, it is difficult to ensure accurate positioning of the drill hole. Therefore, directional drilling combined with traditional grouting is used for drilling and grouting. However, the above method has the following defects when sealing and grouting: (1) Cement, a commonly used grouting material, has a large particle size, poor stability of the slurry, and is easy to precipitate and separate water, which is not conducive to long-distance grouting; (2) Long-distance grouting requires a large pressure, and the traditional sealing quality is poor, which is not conducive to the increase of grouting pressure; (3) Traditional grouting pipes have poor plasticity and cannot be used for curved surface grouting; (4) During deep hole grouting, leakage and pressure relief are prone to occur around the coal wall and the borehole, resulting in poor grouting effect. Based on the problems existing in the existing deep hole grouting methods and processes, it is necessary to further improve the existing deep hole sealing grouting devices. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a deep hole nonlinear grouting and sealing device to solve the above problems.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a deep hole nonlinear grouting sealing device, including a hole, and also including: a grouting plate, a steel pad, a core tube coil, a return grouting tube A and a core tube, the core tube and the return grouting tube A are connected in the hole, the core tube coil is fixedly connected to the core tube, the core tube is equipped with a steel pad, and the grouting plate is fixedly connected to the core tube coil by bolts.

[0005] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0006] Further technical solution: a grouting through-hole is fixedly connected to the grouting plate, the grouting through-hole is connected to the core tube through the pipe opening on the core tube disc, and the other end of the return grout pipe A is fixedly connected to a ball valve.

[0007] Further technical solution: a grouting pipe is connected in the grouting straight-through, the inner end of the grouting pipe is a grouting flower pipe, the outermost section is a grouting solid pipe, and the grouting flower pipe is wrapped with a gauze.

[0008] Further technical solution: a return grouting pipe is connected in the grouting straight-through, and the return grouting pipe is connected to one side of the grouting pipe.

[0009] Further technical solution: the stirring rod is rotatably connected in the silo of the stirrer, the grouting pump is connected to the discharge port of the stirrer through a hose, and the grouting pipe is connected to the feed port of the grouting pump through a connecting pipe.

[0010] Beneficial Effects

[0011] The utility model provides a deep hole nonlinear grouting and sealing device, which has the following beneficial effects compared with the prior art:

[0012] A drill is used to drill into the construction site to form a hole, and then the core tube is lowered to 1m from the bottom of the hole. At the same time, a grouting pipe is lowered to not less than 2m from the hole, and the hole is sealed with cotton yarn and anchoring agent, and the core tube is fixed at the same time. The sealing depth is not less than 400mm. At the same time, the grouting plate, steel pad and core tube plate are connected by bolts, and grouting is carried out using the grouting straight through in the grouting plate. When the grouting pipe leaks, the ball valve is closed. After the slurry solidifies for 4 to 8 hours, a drill is used to drill through the grouting straight through to the designed depth. At this time, the pipe can be lowered throughout the entire process, that is, the grouting pipe is sent into the grouting straight through. The inner end 15m of the grouting pipe is a grouting flower pipe, and the outermost section is a grouting solid pipe. The grouting flower pipe is wrapped with gauze and wrapped tightly with iron wire. A bag is used to seal the hole between the core tube and the grouting pipe 1. The sealing length is 30m, and the upper bag is made of iron The lower end bag is fixed with transparent tape, the plug is fixed on the casing after being wrapped with transparent tape, a layer of woven bag is put on the bag to protect the bag at the bottom of the hole, the upper end of the woven bag is tied with wire and fixed on the casing to prevent the bag from being damaged during the lowering process, the orifice bag and the exhaust pipe are fixed on the solid steel pipe (the two ends of the bag are wrapped and fixed with transparent tape and wire), the inner end bag is about 30m away from the orifice, at this time, the slurry in the agitator is injected into the grouting pipe by a grouting pump, and the return grouting pipe is tied after the grouting, and the grouting is continued until 2-3MPa is reached and then the grouting is stopped. If any abnormal situation is found during the grouting process, such as the orifice bag is found to be damaged and slurry is leaking (observed with a mining lamp), the pump should be stopped immediately, the grouting pipe should be tied tightly, and the return grouting pipe should be used to inject 2-3MPa instead. The grouting pressure reaches the design final value and the pressure is stabilized for 5 minutes before the grouting is ended. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the grouting structure of the utility model.

[0016] Notes on the accompanying drawings: grouting straight through 1, grouting plate 2, steel pad 3, core tube disc 4, return grouting pipe A5, ball valve 6, core tube 8, return grouting pipe 11, agitator 12, grouting pump 13, stirring rod 14, grouting solid pipe 15, grouting flower pipe 16. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0019] See also Figures 1 to 3 , provided by an embodiment of the utility model, a deep hole nonlinear grouting sealing device includes a hole 101, and also includes: a grouting plate 2, a steel pad 3, a core tube coil 4, a return grouting pipe A5 and a core tube 8, the core tube 8 and the return grouting pipe A5 are connected in the hole 101, the core tube coil 4 is fixedly connected to the core tube 8, the core tube 8 is equipped with a steel pad 3, and the grouting plate 2 is fixedly connected to the core tube coil 4 by bolts.

[0020] For the above examples, those skilled in the art should know that when implementing the above technical solution, they are not limited to the specific grouting pump 13 described in the above embodiment. For example, KWJG-2 grouting material is used, which has the characteristics of high permeability, no shrinkage, slight expansion, high fluidity, corrosion resistance and high strength.

[0021] For the above examples, those skilled in the art should be aware that when implementing the above technical scheme, they are not limited to the specific core tube 8 described in the above embodiment. For example, the core tube 8 can reinforce the loose and broken zone in the shallow part of the coal wall to ensure the integrity of the coal wall (equivalent to curtain grouting), thereby preventing slurry leakage and slurry running, improving the grouting effect, and further ensuring that when performing deep hole grouting, the grouting pressure can reach 15MPa, which is more pressure-resistant.

[0022] Specifically, a grouting through hole 1 is fixedly connected to the grouting plate 2, and the grouting through hole 1 is connected to the core tube 8 through a pipe opening on the core tube plate 4, and a ball valve 6 is fixedly connected to the other end of the return grout pipe A5.

[0023] For the above examples, those skilled in the art should know that when implementing the above technical solution, it is not limited to the specific grouting pump 13 described in the above embodiment. For example,

[0024] Specifically, the grouting through hole 1 is connected with a grouting pipe 10, the inner end of the grouting pipe 10 is a grouting flower pipe 16, the outermost section is a grouting solid pipe 15, and the grouting flower pipe 16 is wrapped with a gauze.

[0025] For the above examples, those skilled in the art should be aware that when implementing the above technical scheme, they are not limited to the specific grouting solid pipe 15 recorded in the above embodiment. For example, the grouting solid pipe 15 passes through the bag and has high plasticity, and can be used for long-distance nonlinear grouting. The upper end of the bag is tied with wire, and the lower end is fixed with transparent tape. The plug is fixed on the casing after being wrapped with transparent tape. A layer of woven bag is wrapped around the bag to protect the bag at the bottom of the hole. The upper end of the woven bag is tied with wire and tightly fixed on the casing to prevent the bag from being damaged during the lowering process.

[0026] Specifically, a return grout pipe 11 is connected to the grouting through-hole 1 , and the return grout pipe 11 is connected to one side of the grouting pipe 10 .

[0027] For the above example, those skilled in the art should know that when implementing the above technical solution, it is not limited to the specific hole 101 recorded in the above embodiment. For example, the hole 101 is blocked by cotton yarn and anchoring agent, and the core tube 8 and the return slurry tube A5 are fixed at the same time, and the blocking depth is not less than 400 mm.

[0028] Specifically, the stirring rod 14 is rotatably connected in the silo of the stirrer 12, the grouting pump 13 is connected to the discharge port of the stirrer 12 through a hose, and the grouting pipe 10 is connected to the feeding port of the grouting pump 13 through a connecting pipe.

[0029] For the above examples, those skilled in the art should be aware that when implementing the above technical solution, they are not limited to the specific grouting pump 13 described in the above embodiment. For example, the grouting pump 13 uses a 2ZBQ-16 / 8 pneumatic synchronous grouting pump to achieve high-pressure grouting, and the grouting pressure can reach 15 to 20 MPa.

[0030] In the embodiment of the utility model, a drill is used to drill into the construction site to form a hole 101, and then the core tube 8 is lowered to 1m from the bottom of the hole 101, and the return grouting pipe A5 is lowered to not less than 2m from the hole 101, and the hole 101 is blocked by cotton yarn and anchoring agent, and the core tube 8 is fixed at the same time, and the blocking depth is not less than 400mm. At the same time, the grouting plate 2, the steel pad 3 and the core tube disc 4 are connected by bolts, and the inner part of the grouting plate 2 is used to block the hole 101. The grouting through hole 1 is used for grouting. When the return grouting pipe 5 leaks slurry, the ball valve 6 is closed. After the slurry solidifies for 4 hours, the core tube 8 is drilled to the designed depth through the grouting through hole 1. At this time, the whole pipe can be lowered, that is, the grouting pipe 10 is sent into the grouting through hole 1, wherein the inner end 15m is the grouting flower pipe 16, and the outermost section is the grouting solid pipe 15. The grouting flower pipe 16 is wrapped with a gauze and wrapped tightly with iron wire. The core tube 8 and the grouting pipe 10 are sealed with a bag. The sealing length is 30m. The upper end bag is tied with wire, and the lower end bag is fixed with transparent tape. The plug is fixed on the casing after being wrapped with transparent tape. A layer of woven bag is placed on the bag to protect the bag at the bottom of the hole. The upper end of the woven bag is tied with wire and fixed on the casing to prevent the bag from being damaged during the lowering process. The orifice bag and the exhaust pipe are fixed on the solid steel pipe (the two ends of the bag are wrapped with transparent tape and wire), and the inner end bag is about 30m away from the orifice. At this time, the grouting pump 13 is used to inject the slurry in the agitator 12 into the grouting pipe 10. After the return grouting pipe 11 returns to grout, the return grouting pipe 11 is tied tightly, and the grouting is continued until it reaches 2-3MPa and then the grouting is stopped. If abnormal conditions are found during the grouting process, such as the orifice bag is found to be damaged and slurry is discharged (observed with a mining lamp), the pump should be stopped immediately, the grouting pipe 10 should be tied tightly, and the return grouting pipe should be used to inject 2-3MPa instead. The grouting pressure reaches the design final value and the pressure can be stabilized for 5 minutes before the grouting is ended.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep hole nonlinear grouting and sealing device, comprising a hole (101), characterized in that: Also includes: A grouting plate (2), a steel pad (3), a core tube coil (4), a grouting pipe A (5) and a core tube (8); the core tube (8) and the grouting pipe A (5) are connected in a hole (101); the core tube coil (4) is fixedly connected to the core tube (8); the core tube (8) is equipped with a steel pad (3); and the grouting plate (2) is fixedly connected to the core tube coil (4) by bolts.

2. The deep hole nonlinear grouting and sealing device according to claim 1, characterized in that: The grouting plate (2) is fixedly connected with a grouting through-hole (1), and the grouting through-hole (1) is connected to the core tube (8) through a pipe opening on the core tube plate (4), and the other end of the return grouting pipe A (5) is fixedly connected with a ball valve (6).

3. The deep hole nonlinear grouting and sealing device according to claim 2, characterized in that: The grouting through hole (1) is connected to a grouting pipe (10), the inner end of the grouting pipe (10) is a grouting flower pipe (16), and the outermost section is a grouting solid pipe (15).

4. The deep hole nonlinear grouting and sealing device according to claim 2, characterized in that: The grouting through-hole (1) is connected to a return grouting pipe (11), and the return grouting pipe (11) is connected to one side of the grouting pipe (10).

5. The deep hole nonlinear grouting and sealing device according to claim 3, characterized in that: It also includes a stirring rod (14), wherein the stirring rod (14) is rotatably connected in a silo of the stirrer (12), the discharge port of the stirrer (12) is connected to a grouting pump (13), and the grouting pipe (10) is connected to a feed port of the grouting pump (13) via a connecting pipe.

6. The deep hole nonlinear grouting and sealing device according to claim 1, characterized in that: The hole (101) is blocked by cotton yarn and anchoring agent, and the core tube (8) and the return slurry tube A (5) are fixed at the same time.

7. The deep hole nonlinear grouting and sealing device according to claim 3, characterized in that: The grouting flower tube (16) is wrapped with a gauze mesh and tightly wrapped with iron wire.

8. The deep hole nonlinear grouting and sealing device according to claim 5, characterized in that: The grouting pump (13) adopts a grouting material with high permeability, no shrinkage, slight expansion, high fluidity, corrosion resistance and high strength.

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