Rapid grouting device for coal mine water disaster prevention and control

Abstract

The utility model relates to the technical field of coal mine water disaster prevention and control, in particular to a grouting device for coal mine water disaster prevention and control. Comprising a base, a rotating mechanism and a stirring blade, the rotating mechanism and the stirring blade are driven to rotate through the flow speed of the slurry, the slurry is uniformly stirred, and the stirring effect is good. The buffering mechanism is a semicircular buffering thick sheet, a semi-blocking structure is formed for the double-grout grouting pipe, water flow in the water storage and guide channel can be prevented from instantly dispersing mixed grout, and the purposes of grouting and water plugging are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine water disaster prevention and treatment, and particularly relates to a grouting device for coal mine water disaster prevention and treatment. BACKGROUND

[0002] Coal mine water disaster affects the progress and quality of mine engineering construction, deteriorates the working environment of workers, increases the drainage facilities and drainage cost of the mine, brings unsafe factors to coal production, and even causes well flooding accidents, resulting in significant loss of life and property. In the process of coal mining, it is easy to communicate with old cellar water, causing mine water inrush accidents. Coal mine water disaster also leads to erosion and weakening of surrounding rock, induces secondary disasters, causes water resource damage, reduces resource recoverable rate, and keeps the ton coal drainage cost high. Therefore, it is of important and urgent practical significance to prevent and treat it. Grouting and water plugging is an important means to control mine water disaster. Grouting and water plugging is to press the prepared slurry into the interstice and fissure of underground rock or roadway, so that it diffuses, solidifies and hardens, so that the rock has high strength, compactness and impermeability, and achieves the effect of blocking and cutting off water supply and reinforcing stratum.

[0003] In the patent application No. 201811197320.5, a kind of mine underground super deep drill hole water column grouting double liquid grouting method, the embodiment uses a kind of mine underground super deep drill hole water column grouting double liquid grouting device, including double slurry grouting pipe, the double slurry grouting pipe is composed of inner tube and outer tube, the inner tube and outer tube are both formed by multiple pipe fittings through threaded connection, inner tube and outer tube are sleeved in the center, double slurry injector is installed at the bottom end of double slurry grouting pipe, double slurry injector has first injection hole communicated with inner tube and second injection hole communicated with outer tube, inner tube upper end is sealed and leads to inner tube lead-out pipe, outer tube upper end is sealed and leads to outer tube lead-out pipe, the inner tube lead-out pipe is connected with A slurry grouting pump through A slurry high-pressure rubber tube, the outer tube lead-out pipe is connected with B slurry grouting pump through B slurry high-pressure rubber tube, to achieve the purpose of grouting and water plugging.

[0004] The existing device has the following problems in use: A slurry and B slurry are injected into the inner tube and the outer tube respectively, and flow down along the double slurry grouting pipe, but the mixed liquid cannot be fully stirred, so that the double slurry mixed liquid cannot be well mixed uniformly, which affects the solidification effect. In addition, during the migration of the mixed slurry from the third stage drill hole to the water storage and diversion channel under the pressure of grouting, there is no corresponding buffer mechanism, so that the mixed slurry is easily dispersed by the passive water flow, and the solidification effect is not good, which reduces the efficiency of grouting and water plugging. SUMMARY

[0005] When in use, the existing grouting device is not equipped with components for stirring different slurries, so that different slurries cannot be mixed evenly. In addition, when the mixed liquid flows into the water storage and guide channel, there is no corresponding buffer mechanism. Under the intense water flow, the mixed liquid is easily dispersed in an instant, and a good solidification effect cannot be achieved.

[0006] In order to overcome the problems existing in the existing technology, the utility model provides a new technical idea. A rotating stirring blade structure is provided at the outlet of the double-slurry grouting pipe. The stirring blade is driven to rotate by the impact force of the slurry, so that different slurries can be evenly mixed. At the same time, when the mixed liquid flows into the water storage and diversion channel, the pipeline is designed as a semi-closed structure, which can block the water flow velocity and reduce the water flow pressure, thereby achieving a better solidification effect.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A rapid grouting device for preventing and controlling water hazards in coal mines includes a double-slurry grouting pipe, characterized in that a stirring mechanism for mixing different slurries and a buffer mechanism for blocking the flow velocity of dynamic water are provided inside the bottom end of the double-slurry grouting pipe, and the stirring mechanism is arranged above the buffer mechanism.

[0009] Furthermore, the stirring mechanism includes a base, a rotating assembly and a locking ring. The base is fixedly mounted on the inner wall of the double-slurry grouting pipe. The rotating assembly passes through the base and is connected to the locking ring.

[0010] The buffer mechanism is a hollow cylinder, and the hollow cylinder is tiltedly arranged on the inner side of the bottom end of the double-slurry grouting pipe. The buffer mechanism is connected to the outer pipe wall of the double-slurry grouting pipe with an oblique cut one and an oblique cut two respectively. The cylindrical surface of the hollow cylinder close to the stirring mechanism is provided with a side opening that passes through the double-slurry grouting pipe, and the interior of the hollow cylinder is provided with a semicircular buffer thick plate perpendicular to the side opening.

[0011] Preferably, the buffer thick sheet is an X-shaped structure with two surfaces concave, and a plurality of buffer holes are provided on the buffer thick sheet.

[0012] Compared with the existing technology, the beneficial effects of the present invention are reflected in: 1. By setting up a stirring mechanism, when two different slurries, A slurry and B slurry, flow down from the double-slurry grouting pipe, they can be better and evenly mixed with the help of the stirring mechanism, thereby achieving a better solidification effect; 2. By setting up a buffer mechanism, the pipeline is designed as a semi-enclosed structure, which does not affect the flow of the mixed liquid, but can produce a certain degree of obstruction to the intense water flow dynamics, reduce the water flow pressure, and enable the mixed slurry to be better solidified at the buffer mechanism, thereby improving the efficiency of grouting and water blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the whole structure schematic view of the utility model.

[0014] Figure 2 It is the local enlarged schematic view of the utility model.

[0015] Figure 3 It is the whole structure schematic view of the utility model Figure 1 A portion of the enlarged view.

[0016] Figure 4 It is the whole structure schematic view of the utility model Figure 3 The enlarged view of a portion.

[0017] Figure 5 It is the whole structure schematic view of the utility model Figure 4 The enlarged view of a portion.

[0018] Figure 6 It is the local enlarged schematic view of the utility model.

[0019] Figure 7 It is the whole structure schematic view of the utility model.

[0020] Figure 8 It is the whole structure schematic view of the utility model.

[0021] Figure 9 It is the whole structure schematic view of the utility model.

[0022] Figure 10 It is the whole structure schematic view of the utility model.

[0023] Figure 11 It is the whole structure schematic view of the utility model.

[0024] Figure 12 It is the whole structure schematic view of the utility model Figure 11 The enlarged view of the section A-A.

[0025] The marks in the drawing respectively represent: 1. outer pipe; 2. inner pipe; 3. first pressure relief valve; 4. second pressure relief valve; 5. second stage aperture sleeve; 6. sealing assembly; 7. third pressure relief valve; 8. double grout injection pipe; 9. high pressure water column; 10. outer pipe lead-out pipe; 11. high pressure water flow; 12. base; 13. rotating rod; 14. stirring blade; 15. bearing; 16. locking ring; 17. buffer thick sheet; 18. buffer hole; 19. inner pipe lead-out pipe; 20. water storage and guide channel; 21. oblique cutout one; 22. side opening; 23. oblique cutout two. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "several" means two or more, unless otherwise clearly and specifically defined. Example 1

[0028] See also Figures 1-12 The rapid grouting device for preventing and controlling water hazards in coal mines of the present invention comprises a double-slurry grouting pipe 8 , which comprises an inner pipe 2 and an outer pipe 1 .

[0029] In some embodiments, the upper end of the inner tube of the double-slurry grouting pipe 8 is sealed and the inner tube lead-out pipe 19 is led out, and the inner tube lead-out pipe 19 is connected to the A slurry high-pressure hose. The upper end of the outer tube is sealed and the outer tube lead-out pipe 10 is led out, and the outer tube lead-out pipe 10 is connected to the B slurry high-pressure hose.

[0030] In specific applications, a first pressure relief valve 3 is installed between the inner tube outlet pipe 19 and the A slurry high-pressure hose, and a second pressure relief valve 4 is installed between the outer tube outlet pipe 10 and the B slurry high-pressure hose.

[0031] It is understandable that the inner tube 2 and the outer tube 1 are both formed by connecting multiple sections of pipes through threads.

[0032] It can be supplemented that the inner tube outlet pipe 19 is connected to the A slurry grouting pump through the A slurry high-pressure hose, and the outer tube outlet pipe 10 is connected to the B slurry grouting pump through the B slurry high-pressure hose.

[0033] Preferably, the inner tube 2 and the outer tube 1 are concentrically mounted, and a stirring mechanism for mixing different slurries is installed at the bottom end of the double-slurry grouting pipe 8.

[0034] Further, the stirring mechanism comprises a base 12 fixedly installed on the inner wall of the double-syringe grouting pipe 8, a rotating assembly penetrating through the base 12 and locked by a locking ring 16, and a bearing 15 arranged between the rotating assembly and the base 12.

[0035] As an example, the rotating assembly comprises a rotating rod 13 and stirring blades 14, the stirring blades 14 are provided in three groups and fixedly connected to the rotating rod 13, and rotate with the rotating rod 13.

[0036] It should be noted that the bottom end of the double-syringe grouting pipe 8 is provided with a buffering mechanism for blocking the water flow speed.

[0037] In the specific example of the utility model, the buffering mechanism is a hollow cylinder, which is obliquely arranged on the inner side of the bottom end of the double-syringe grouting pipe 8, and the hollow cylinder is connected to the outer wall of the double-syringe grouting pipe 8 at the positions of a first oblique cutout 21 and a second oblique cutout 23, the first oblique cutout 21 is away from one end of the buffering thick piece 17, the second oblique cutout 23 is close to one end of the buffering thick piece 17, a side opening 22 penetrating through the double-syringe grouting pipe 8 is arranged on the cylindrical surface of the hollow cylinder close to the stirring mechanism, and a semicircular buffering thick piece 17 perpendicular to the side opening 22 is arranged in the hollow cylinder.

[0038] The buffering thick piece 17 is connected to the inner wall of the double-syringe grouting pipe 8, and forms a semi-blocking structure for the pipeline of the double-syringe grouting pipe 8, and the buffering thick piece 17 is an X-shaped structure with two concave surfaces.

[0039] In the above technical solution, the buffering thick piece 17 is concave on both surfaces, the concave surface on one side is used for buffering the A slurry and the B slurry flowing out of the double-syringe grouting pipe 8, so that the two kinds of slurries can be mixed again to a certain extent on the concave surface after being mixed by the stirring mechanism, and the concave surface on the other side is used for decomposing and buffering the water flow speed of the high-pressure water flow 11 in the water guide channel 20, so as to prevent the double-syringe mixed liquid from being dispersed by the excessive water flow.

[0040] In particular, in order to prevent the buffering thick piece 17 from blocking the water flow too much, a plurality of buffering holes 18 are arranged on the buffering thick piece 17, so as to facilitate the water flow.

[0041] Finally, it can be supplemented that the buffering thick piece 17 can buffer the water flow in the water guide channel 20, prevent the double-syringe mixed liquid from being dispersed instantaneously, and the buffering holes on the buffering thick piece can not block the water flow too much, so as not to affect the flow of the double-syringe mixed liquid driven by the water flow. Embodiment two

[0042] The specific application of the device in the rapid grouting of the coal mine water disaster prevention is as follows: a third level drilling hole is constructed, whether the stratum lithology has the water storage and diversion channel 20 is judged, and the accurate position of the water storage and diversion channel 20 is judged; when the water storage and diversion channel 20 is exposed in the third level hole diameter drilling hole and water gushing occurs, the rock is drilled until the water storage and diversion channel 20 is penetrated by about one meter, the water gushing amount and the water pressure per unit time are accurately measured, the water storage and diversion channel 20 is estimated according to the water gushing amount and the water pressure, a high-pressure variable grouting pump is provided on site, corresponding gears and flow rates that can meet the requirements of the grouting pressure are selected, a second level hole diameter drilling hole is formed by using a second level hole diameter drill bit to expand the hole diameter of the third level hole diameter drilling hole, a second level hole diameter casing 5 is lowered into the second level hole diameter drilling hole and grouting is performed between the second level hole diameter casing 5 and the first level hole diameter casing to form a casing solidification body, the second level hole diameter casing is formed by a plurality of short pipes connected through threads, a third pressure relief valve 7 is installed on the upper end of the second level hole diameter casing 5, a double slurry grouting pipe 8 is connected and lowered, the third pressure relief valve 7 is opened, water in the second level hole diameter casing 5 gushes out from the third pressure relief valve 7, a sealing assembly 6 is installed to seal the gap between the upper end of the second level hole diameter casing 5 and the double slurry grouting pipe 8, after the sealing assembly 6 is installed, the third pressure relief valve 7 is closed, an A slurry grouting pump and a B slurry grouting pump are started, and A slurry and B slurry are injected into the third level hole diameter drilling hole through the double slurry grouting pipe 8, the two kinds of slurries are mixed into mixed slurry at the bottom of the double slurry grouting pipe under the action of a stirring mechanism, the mixed slurry is transported into the water storage and diversion channel 20 through the third level hole diameter drilling hole under the action of the grouting pressure, and the mixed slurry is initially solidified and solidified in the water storage and diversion channel 20 to block the water storage and diversion channel 20, so that the purpose of grouting and water blocking is achieved, after the grouting is completed, the first pressure relief valve 3, the second pressure relief valve 4 and the third pressure relief valve 7 are opened respectively, so that the liquid pressure in the inner pipe 2 and the outer pipe 1 of the double slurry grouting pipe 8 and the water column pressure in the second level hole diameter casing 5 are unloaded respectively, and then the double slurry grouting pipe 8 and the sealing assembly 6 can be removed, otherwise, a safety accident of high-pressure slurry or high-pressure water spouting to injure people may occur.

[0043] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred embodiments of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A rapid grouting device for preventing and controlling water hazards in coal mines, comprising a double-slurry grouting pipe (8), characterized in that: A stirring mechanism for mixing different slurries and a buffer mechanism for blocking the velocity of the dynamic water flow are provided inside the bottom end of the double-slurry grouting pipe (8), and the stirring mechanism is provided above the buffer mechanism.

2. A rapid grouting device for preventing and controlling water hazards in coal mines according to claim 1, characterized in that: The stirring mechanism comprises a base (12), a rotating assembly and a locking ring (16); the base (12) is mounted on the inner wall of the double-slurry grouting pipe (8); the rotating assembly passes through the base (12) and is connected to the locking ring (16).

3. A rapid grouting device for preventing and controlling water hazards in coal mines according to claim 2, characterized in that: The buffer mechanism is a hollow cylinder, and the hollow cylinder is arranged obliquely on the inner side of the bottom end of the double-slurry grouting pipe (8).

4. A rapid grouting device for preventing and controlling water hazards in coal mines according to claim 3, characterized in that: The connection between the hollow cylinder and the outer wall of the double-slurry grouting pipe (8) is respectively provided with an oblique cutout 1 (21) and an oblique cutout 2 (23); a side opening (22) penetrating the double-slurry grouting pipe (8) is provided on the cylindrical surface of the hollow cylinder close to the stirring mechanism; and a semicircular buffer thick plate (17) perpendicular to the side opening (22) is provided inside the hollow cylinder.

5. A rapid grouting device for preventing and controlling water hazards in coal mines according to claim 4, characterized in that: The buffer thick sheet (17) is an X-shaped structure with two inwardly concave surfaces, and a plurality of buffer holes (18) are provided on the buffer thick sheet (17).

Images