Mine drilling leaking stoppage grouting structure

Abstract

The utility model discloses a grouting structure for leaking stoppage of a mine drilling hole, and relates to the technical field of leaking stoppage of the mine drilling hole. The mine drilling leaking stoppage grouting structure comprises an upper plugging piece, a lower plugging piece, a shaft and a grouting barrel, the upper plugging piece and the lower plugging piece are oppositely arranged in the shaft, a disc is arranged on the upper side of the grouting barrel, a plurality of connecting rods are fixed between the disc and the outer wall of the grouting barrel, a servo motor is installed at the bottom of the disc, and the output end of the servo motor is connected with a lead screw; a threaded pipe is arranged on the outer side of the lead screw in a threaded mode, a through hole penetrates through the bottom of the grouting barrel, a plugging plate is fixed to the bottom of the threaded pipe, a sealing block is arranged on the plugging plate and matched with the through hole, and therefore the plugging effect of the bottom of the grouting barrel is achieved, and a pressure applying assembly is arranged on the upper side of the outer wall of the threaded pipe and matched with an inner cavity of the grouting barrel. And filling of the plugging liquid in the grouting barrel is accelerated, and the working efficiency of grouting plugging operation is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of mine borehole sealing technology, and in particular relates to a grouting structure for mine borehole sealing. Background Technology

[0002] Loss of flow (LOF) is a common occurrence during drilling operations. Delamination, voids, cracks, pores, and other unrestricted flow channels around the wellbore significantly reduce its integrity. Damaged wellbore walls can lead to the failure of inter-stratum isolation, causing unintended fluid migration between layers or along planes, resulting in various negative impacts, including property damage and even serious accidents. Therefore, it is necessary to grout and seal cracks and voids in the wellbore.

[0003] Publication No. CN220451831U discloses a grouting structure for plugging leaks in mine boreholes. By setting a funnel channel on the annular stop block, the problem of the grouting cylinder being unable to align with the grouting hole due to shaking during hoisting is solved. At the same time, the main rope, auxiliary rope and traction rope are gradually relaxed, and the piston slides down under the action of gravity, causing the annular protrusion of the sealing disc to disengage from the annular groove of the annular platform, thereby releasing the seal and injecting the sealing fluid into the repair chamber. When the injection is completed, the grouting cylinder is lifted, and the main rope, auxiliary rope and traction rope are tightened again, the sealing disc returns to its original position, and the bottom of the grouting cylinder is sealed again, preventing the grouting fluid from dripping onto the surface of the upper sealing component, thereby reducing the maintenance work of workers in the later stage.

[0004] The aforementioned prior art still has the following drawbacks in practical implementation:

[0005] During use, the lack of a corresponding pressure-applying structure means that after the annular protrusion of the sealing disc separates from the annular groove of the annular platform, the sealing fluid flows downward and is injected into the repair chamber solely by gravity. Due to the viscosity of the sealing fluid, the injection speed into the repair chamber is slow, which makes the grouting and sealing of cracks and holes in the well wall take a long time and is inefficient.

[0006] To address the above issues, we propose a grouting structure for plugging leaks in mine boreholes. Utility Model Content

[0007] Technical solution

[0008] To address the aforementioned technical problems, this utility model provides a mine borehole plugging and grouting structure, comprising an upper sealing component, a lower sealing component, a shaft, a lifting mechanism, and a grouting cylinder. The upper and lower sealing components are disposed opposite each other within the shaft, forming a repair chamber between the upper and lower sealing components and the inner wall of the shaft. A disc is disposed on the upper side of the grouting cylinder, and several connecting rods are fixed between the disc and the outer wall of the grouting cylinder. A servo motor is installed at the bottom of the disc, and a lead screw is connected to the output end of the servo motor. A threaded tube is threaded onto the outer side of the lead screw, and the threaded tube is movably disposed within the cavity of the grouting cylinder. A through hole is penetrating the bottom of the grouting cylinder, and a sealing plate is fixed therethrough at the lower end of the threaded tube. A sealing block is disposed on the top of the sealing plate, and the sealing block is sleeved on the outer side of the threaded tube, engaging with the through hole. A pressure-applying component is disposed on the upper side of the outer wall of the threaded tube, and the pressure-applying component engages with the cavity of the grouting cylinder.

[0009] The pressure-applying assembly includes a fixing ring, a semi-circular extrusion plate, and fastening bolts. The fixing ring is fixed to the upper side of the outer wall of the threaded tube. Several second threaded holes are opened through the fixing ring. The semi-circular extrusion plate cooperates with the fixing ring. Several first threaded holes are opened on the semi-circular extrusion plate. The first threaded holes and the second threaded holes correspond one-to-one. The fastening bolts are threadedly engaged with the first threaded holes and the second threaded holes.

[0010] The bottom of the grouting cylinder has two guide rods fixed to each other, and the surface of the semi-circular extrusion plate has a circular hole through it. The guide rods are movably engaged with the circular hole.

[0011] The lifting mechanism is located above the well shaft. A hoisting rope is wound up on the lifting mechanism. Several connecting ropes are fixedly connected to the movable end of the hoisting rope. The end of the connecting rope away from the hoisting rope is fixedly connected to the disc.

[0012] The upper sealing component has several water injection pipes installed on the side wall of the pipe column, and an annular stop block is installed at the bottom end of the pipe column of the upper sealing component. A grouting hole is opened at the center of the annular stop block.

[0013] The grouting hole is sealed with a funnel channel, and a limiting ring is fitted on the lower side of the outer wall of the grouting cylinder. The limiting ring and the funnel channel cooperate with each other.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes the threaded engagement between a threaded tube and a lead screw to facilitate downward movement of the threaded tube, thereby moving the sealing plate and sealing block downwards away from the through hole at the bottom of the grouting cylinder. Simultaneously, as the threaded tube moves downwards, it drives the pressure-applying component downwards along the inner cavity of the grouting cylinder, applying downward pressure to the sealing fluid inside the cylinder. This accelerates the injection speed of the sealing fluid and effectively improves the efficiency of grouting and sealing operations. It overcomes the shortcomings of existing technologies where, during grouting and sealing, the lack of a corresponding pressure-applying structure means that after the annular protrusion of the sealing disc separates from the annular groove of the annular platform, the sealing fluid flows downwards and is injected into the repair chamber solely by gravity. Due to the viscosity of the sealing fluid, the injection speed into the repair chamber is slow, resulting in a long time required for grouting and sealing cracks and holes in the well wall, leading to low efficiency. Attached Figure Description

[0016] Figure 1 This is a front sectional view of the present invention;

[0017] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0019] Figure 4 This is a schematic diagram of the structure of the semi-circular extrusion plate and the fixing ring in the separated state in this utility model;

[0020] Figure 5 for Figure 4 A magnified structural diagram at point C.

[0021] The markings in the attached diagram are as follows: 1. Upper sealing component; 2. Lower sealing component; 3. Grouting cylinder; 4. Disc; 5. Servo motor; 6. Lead screw; 7. Threaded pipe; 8. Sealing block; 9. Sealing plate; 10. Connecting rod; 11. Fixing ring; 12. Semi-circular extrusion plate; 13. Fastening bolt; 14. Round hole; 15. Guide rod; 16. Limiting ring; 17. Lifting mechanism; 18. Lifting rope; 19. Connecting rope. Detailed Implementation

[0022] This specific embodiment is a grouting structure for plugging leaks in mine boreholes, such as... Figures 1-5As shown, the mine borehole plugging and grouting structure includes an upper sealing component 1, a lower sealing component 2, a shaft, a lifting mechanism 17, and a grouting cylinder 3. The upper sealing component 1 and the lower sealing component 2 are arranged opposite each other inside the shaft, and a repair chamber is formed between the upper sealing component 1, the lower sealing component 2 and the inner wall of the shaft. A disc 4 is provided on the upper side of the grouting cylinder 3. Several connecting rods 10 are fixed between the disc 4 and the outer wall of the grouting cylinder 3. A servo motor 5 is installed at the bottom of the disc 4. A lead screw 6 is connected to the output end of the servo motor 5. A threaded tube 7 is provided on the outer side of the lead screw 6. The threaded tube 7 is movably arranged in the inner cavity of the grouting cylinder 3. A through hole is passed through the bottom of the grouting cylinder 3. The lower end of the threaded tube 7 passes through the through hole and is fixed with a sealing plate 9. A sealing block 8 is provided on the top of the sealing plate 9. The sealing block 8 is sleeved on the outside of the threaded tube 7 and cooperates with the through hole. A pressure application component is provided on the upper side of the outer wall of the threaded tube 7. The pressure application component cooperates with the inner cavity of the grouting cylinder 3.

[0023] The threaded engagement between the threaded tube 7 and the lead screw 6 facilitates the downward movement of the threaded tube 7, which in turn drives the sealing plate 9 and the sealing block 8 downward, away from the through hole at the bottom of the grouting cylinder 3. Simultaneously, as the threaded tube 7 moves downward, it drives the pressure-applying components downward along the inner cavity of the grouting cylinder 3, applying downward pressure to the sealing fluid inside the grouting cylinder 3. This accelerates the injection speed of the sealing fluid, effectively improving the efficiency of the grouting and sealing operation. This solves the problem of existing technologies lacking a corresponding pressure-applying structure during grouting and sealing. In these technologies, after the annular protrusion of the sealing disc separates from the annular groove of the annular platform, the sealing fluid flows downward and is injected into the repair chamber solely by gravity. Due to the viscosity of the sealing fluid, the injection speed into the repair chamber is slow, resulting in a long time required for grouting and sealing cracks and holes in the well wall, leading to low efficiency.

[0024] The pressure-applying assembly includes a fixing ring 11, a semi-circular extrusion plate 12, and a fastening bolt 13. The fixing ring 11 is fixed to the upper side of the outer wall of the threaded pipe 7. Several second screw holes are opened through the fixing ring 11. The semi-circular extrusion plate 12 cooperates with the fixing ring 11. Several first screw holes are opened on the semi-circular extrusion plate 12, and the first screw holes correspond one-to-one with the second screw holes. The fastening bolt 13 is threadedly engaged with the first screw holes and the second screw holes. Two guide rods 15 are fixed at the bottom of the inner cavity of the grouting cylinder 3. A circular hole 14 is opened through the surface of the semi-circular extrusion plate 12. The guide rods 15 are movably engaged with the circular hole 14. Through the movable engagement of the guide rods 15 and the circular hole 14, the sliding engagement of the semi-circular extrusion plate 12 and the guide rods 15 is realized, thereby playing a limiting and guiding role for the threaded pipe 7 and ensuring the stability of the threaded pipe 7 during its up and down movement.

[0025] The lifting mechanism 17 is located above the shaft. A hoisting rope 18 is wound on the lifting mechanism 17. Several connecting ropes 19 are fixedly connected to the movable end of the hoisting rope 18. The end of the connecting rope 19 away from the hoisting rope 18 is fixedly connected to the disc 4.

[0026] Several water injection pipes are provided on the side wall of the upper sealing component 1. An annular block is provided at the bottom of the upper sealing component 1. A grouting hole is opened at the center of the annular block. A funnel channel is sealed around the grouting hole. A limiting ring 16 is sleeved on the lower side of the outer wall of the grouting cylinder 3. The limiting ring 16 cooperates with the funnel channel.

[0027] Example:

[0028] In the initial state, the threaded pipe 7 is located inside the grouting cylinder 3. At this time, the sealing plate 9 abuts against the bottom of the grouting cylinder 3, causing the sealing block 8 to be stuck in the through hole at the bottom of the grouting cylinder 3. When in use, first adjust the two semi-circular extrusion plates 12 to press on the fixing ring 11, and make the guide rod 15 inserted into the corresponding circular hole 14. At this time, the first screw hole and the second screw hole are aligned one by one, and the two semi-circular extrusion plates 12 are joined together to form a circular extrusion plate. Next, adjust the fastening bolt 13 to be screwed into the first screw hole on the semi-circular extrusion plate 12 until the fastening bolt 13 is screwed into the second screw hole, so that the semi-circular extrusion plate 12 is fixedly connected to the fixing ring 11. Then, fill the grouting cylinder 3 with sealing liquid.

[0029] After filling is completed, the disc 4 is lowered with the cooperation of the lifting mechanism 17, the hoisting rope 18 and the connecting rope 19, which in turn lowers the grouting cylinder 3 into the well. When the grouting cylinder 3 is lowered to the funnel channel, the grouting cylinder 3 moves steadily downward with the cooperation of the limiting ring 16 and the funnel channel until the lower end of the grouting cylinder 3 passes through the grouting hole, causing the limiting ring 16 to contact the annular stop block.

[0030] At this time, the servo motor 5 is started, and the lead screw 6 is driven to rotate by the servo motor 5. With the threaded engagement between the threaded tube 7 and the lead screw 6, combined with the movable engagement between the guide rod 15 and the round hole 14, the threaded tube 7 is adjusted to move downward stably. As the threaded tube 7 moves downward, the sealing plate 9 and the sealing block 8 move downward synchronously, away from the through hole at the bottom of the grouting cylinder 3.

[0031] During the downward movement of the threaded pipe 7, the semi-circular extrusion plates 12, which are connected together, move synchronously downward along the inner cavity of the grouting cylinder 3. This extrusion effect on the upper layer of the sealing fluid inside the grouting cylinder 3 forces the sealing fluid inside the grouting cylinder 3 downward, accelerating the injection speed of the sealing fluid and effectively improving the efficiency of the grouting and sealing operation. This solves the problem of existing technologies lacking a corresponding pressure structure during the grouting and sealing process. After the annular protrusion of the sealing disc separates from the annular groove of the annular platform, the sealing fluid is only allowed to flow downward and be injected into the repair chamber by gravity. Due to the viscosity of the sealing fluid, the injection speed into the repair chamber is slow, which makes the grouting and sealing of cracks and holes in the well wall take a long time and is inefficient.

[0032] It should be further noted that the installation structure, connection method or setting method of each component in this utility model are all common mechanical methods. As long as they can achieve their beneficial effects, they can be implemented. At the same time, the servo motor 5 in this utility model is purchased from the market. Those skilled in the art can install and use it according to the requirements.

[0033] The lifting mechanism 17 in this utility model is the prior art disclosed in the authorized patent cited in the background art. Its specific structure, working principle and usage method will not be described in detail here.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A grouting structure for plugging leaks in mine boreholes, comprising an upper sealing component (1), a lower sealing component (2), a shaft, a lifting mechanism (17), and a grouting cylinder (3), wherein the upper sealing component (1) and the lower sealing component (2) are disposed opposite to each other within the shaft, and a repair chamber is formed between the upper sealing component (1), the lower sealing component (2), and the inner wall of the shaft, characterized in that, A disc (4) is provided on the upper side of the grouting cylinder (3). Several connecting rods (10) are fixed between the disc (4) and the outer wall of the grouting cylinder (3). A servo motor (5) is installed at the bottom of the disc (4). A lead screw (6) is connected to the output end of the servo motor (5). A threaded tube (7) is provided on the outer side of the lead screw (6). The threaded tube (7) is movably disposed in the inner cavity of the grouting cylinder (3). A through hole is provided at the bottom of the grouting cylinder (3). A sealing plate (9) is fixed at the lower end of the threaded tube (7) through the through hole. A sealing block (8) is provided on the top of the sealing plate (9). The sealing block (8) is sleeved on the outer side of the threaded tube (7). The sealing block (8) cooperates with the through hole. A pressure-applying component is provided on the upper side of the outer wall of the threaded tube (7). The pressure-applying component cooperates with the inner cavity of the grouting cylinder (3).

2. The grouting structure for plugging leaks in mine boreholes according to claim 1, characterized in that, The pressure-applying assembly includes a fixing ring (11), a semi-circular extrusion plate (12), and a fastening bolt (13). The fixing ring (11) is fixed to the upper side of the outer wall of the threaded tube (7). A plurality of second screw holes are provided through the fixing ring (11). The semi-circular extrusion plate (12) cooperates with the fixing ring (11). A plurality of first screw holes are provided on the semi-circular extrusion plate (12). The first screw holes and the second screw holes correspond one-to-one. The fastening bolt (13) is threadedly engaged with the first screw holes and the second screw holes.

3. The grouting structure for plugging leaks in mine boreholes according to claim 2, characterized in that, The bottom of the grouting cylinder (3) has two guide rods (15) fixed relative to each other, and the surface of the semi-circular extrusion plate (12) has a circular hole (14) through it. The guide rods (15) are in movable cooperation with the circular hole (14).

4. The grouting structure for plugging leaks in mine boreholes according to claim 3, characterized in that, The lifting mechanism (17) is located above the well shaft. A hoisting rope (18) is wound on the lifting mechanism (17). Several connecting ropes (19) are fixedly connected to the movable end of the hoisting rope (18). The end of the connecting rope (19) away from the hoisting rope (18) is fixedly connected to the disc (4).

5. The grouting structure for plugging leaks in mine boreholes according to claim 4, characterized in that, The upper sealing component (1) has several water injection pipes on the side wall of the pipe column, and an annular stop block is provided at the bottom end of the pipe column of the upper sealing component (1), with a grouting hole at the center of the annular stop block.

6. The grouting structure for plugging leaks in mine boreholes according to claim 5, characterized in that, The grouting hole is sealed with a funnel channel, and a limiting ring (16) is sleeved on the lower side of the outer wall of the grouting cylinder (3). The limiting ring (16) cooperates with the funnel channel.

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