Double-sleeve structure for lifting stratum through coal mine deep drilling and high-pressure grouting
By using a combination design of rubber plug seat and rubber sleeve in the grouting pipe, the automatic sealing and release function is achieved, which solves the problem that the grouting pipe cannot be automatically closed, improves the grouting efficiency and reliability, and ensures the reinforcement effect of the formation and economics of engineering.
Patent Information
- Application Number
- CN202421140199.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-23
AI Technical Summary
In traditional grouting reinforcement technology, grouting pipes cannot be automatically closed after stopping grouting, resulting in slurry spilling, wasting materials and affecting the quality of the project and the environment.
A double casing structure of deep-boring high-pressure grouting lifting formation in coal mines was designed, and the combination of rubber plug seats and rubber sleeves was designed to achieve automatic sealing and release functions, ensuring the durability and stability of grouting effect.
Effectively prevent the slurry from overflowing after grouting, improve the grouting efficiency and reliability, and ensure the reinforcement effect of the formation and the economicality of the engineering.
Smart Images
Figure CN222315106U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mine machinery, and more specifically, to a double casing structure for high-pressure grouting and lifting strata in deep drilling of coal mines. Background Art
[0002] The geological conditions of coal mines in my country are extremely complex. During the underground drilling construction process, faults, collapse columns and other structurally broken strata are often encountered. The existence of these strata poses a great challenge to the drilling work, because when drilling in such strata, it is very easy to have problems such as hole collapse, drill stuck and drill stuck. These problems not only lead to poor porosity and shallow hole depth, but may also cause a series of accidents in the hole. In recent years, grouting reinforcement technology has gradually been applied to solve the problem of shallow hole drilling in structurally broken strata. This technology mainly injects the configured grouting material into the borehole through a grouting pump, maintains a certain grouting pressure and grouting speed, so that the grouting material can fully penetrate into the rock formation and consolidate, and enhances the stability of the formation by reinforcing the underground rock formation, thereby preventing surface collapse and raising It improves the stability of the mining face and provides strong guarantee for the safe production and efficient mining of coal mines. There are two main grouting methods of traditional grouting reinforcement technology: full-hole grouting reinforcement technology and local grouting reinforcement technology. The full-hole grouting reinforcement technology is to directly inject grouting materials into the hole after the hole mouth is closed. However, in actual application, this technology has a problem: the grouting pipe cannot automatically close the grouting hole after the grouting is stopped. This leads to the slurry easily overflowing from the grouting hole due to the pressure difference inside and outside the pipe or other reasons after the grouting is completed. This not only wastes grouting materials and increases engineering costs, but may also affect the grouting effect and engineering quality, such as reducing the reinforcement effect of the formation or causing environmental pollution. Therefore, it needs to be improved and optimized. Utility Model Content
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a double casing structure for high-pressure grouting to lift strata in deep drilling of coal mines, which has the advantages of simple operation and good grouting effect.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double casing structure for high-pressure grouting to lift strata in deep drilling in coal mines, comprising a grouting pipe, wherein a rubber plug seat is fixedly installed at the bottom of the grouting pipe, three annular grooves are provided on the outer wall of the grouting pipe, grouting holes are provided on the outer walls of the three annular grooves, the grouting holes penetrate the grouting pipe, and a rubber sleeve is elastically sleeved on the outer wall of the annular groove.
[0005] As a preferred technical solution of the utility model, the top thread of the grouting pipe one is installed with the grouting pipe two, and the top thread of the grouting pipe two is installed with the grouting pipe three.
[0006] As a preferred technical solution of the utility model, a flange one is fixedly installed on the top of the grouting pipe three.
[0007] As a preferred technical solution of the utility model, a target grouting layer is arranged on the outside of the grouting pipe one, a solid pipe is arranged on the top of the target grouting layer, bedrock is arranged on the outside of the solid pipe and the target grouting layer, a flange one is fixedly installed on the top of the solid pipe, and the flange one and the flange two are fixedly connected by a bolt and nut assembly.
[0008] As a preferred technical solution of the utility model, the top inner walls of the grouting pipe one and the grouting pipe two are respectively provided with a thread groove two, and the bottom outer walls of the grouting pipe two and the grouting pipe three are respectively provided with a thread groove one, and the thread groove one and the thread groove two are adapted to each other.
[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0010] 1. The utility model can enhance the sealing of the bottom of the grouting pipe 1 by setting the design of the rubber plug seat to prevent leakage during the grouting process. The design of the annular groove and the grouting hole makes the grouting pipe 1 have a more uniform grouting ability. During the grouting process, the slurry can be evenly injected into the formation through the grouting hole, thereby achieving a uniform grouting effect. In addition, the rubber sleeve elastically sleeved on the outer wall of the annular groove: the design of the rubber sleeve can provide additional sealing and protection. When the grouting starts, the slurry inside the grouting pipe 1 gradually increases under the action of pressure. This pressure will force the rubber sleeve to expand, allowing the slurry to flow out of the grouting hole on the annular groove, thereby effectively injecting the slurry into the formation that needs to be reinforced or lifted. When the grouting process is completed, the pressure inside the grouting pipe 1 gradually decreases. As the pressure gradually decreases, the rubber sleeve will shrink and recover due to its own elasticity. This process is automatic and does not require human intervention or external operation. The shrunken rubber sleeve will fit tightly against the outer wall of the annular groove and completely block the grouting hole. This can effectively avoid slurry overflow caused by pressure differences inside and outside the pipe or other reasons after the grouting is completed, thereby ensuring the durability and stability of the grouting effect. It not only improves the efficiency of the grouting process, but also ensures the reliability of the grouting effect. Through the automatic expansion and contraction of the rubber sleeve, the grouting pipe realizes the dynamic sealing and releasing functions during the grouting process. Through deep drilling high-pressure grouting technology, the grouting material is injected into the rock formation to fill the gaps and cracks in the rock formation, so that the rock formation regains its integrity and stability, thereby enhancing the bearing capacity of the formation.
[0011] 2. The utility model can ensure that each grouting pipe is firmly connected through threaded connection, and it is not easy to loosen due to external pressure or vibration. This stability is crucial for the high-pressure grouting process, and can ensure the smooth progress of the grouting process and the maximization of the grouting effect. Compared with traditional devices, the requirements for grouting volume and grouting pressure are different for different engineering projects. The threaded connection method allows the number and combination of grouting pipes to be flexibly adjusted. Construction personnel can add or reduce the number of grouting pipes according to actual engineering needs to avoid wasting materials, ensuring the efficient progress of the grouting project and the realization of the best grouting effect. Flexible configuration also helps to optimize cost-effectiveness, thereby improving the overall economy of the project. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a front sectional structural schematic diagram of the utility model;
[0013] Figure 2 This is a schematic diagram of the internal structure of the bedrock of the utility model;
[0014] Figure 3 It is a schematic diagram of the local structure of the utility model;
[0015] Figure 4 This is a schematic diagram of the partial explosion structure of the utility model;
[0016] Figure 5 This is a schematic diagram of the annular groove structure of the utility model.
[0017] In the figure: 1. bedrock; 2. solid pipe; 3. target grouting layer; 4. grouting pipe one; 5. thread groove one; 6. thread groove two; 7. annular groove; 8. grouting hole; 9. rubber sleeve; 10. rubber plug seat; 11. flange one; 12. flange two; 13. grouting pipe three; 14. grouting pipe two; 15. bolt and nut assembly. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] like Figures 1 to 5As shown, the utility model provides a double casing structure for high-pressure grouting to lift strata in deep drilling in coal mines, including a grouting pipe 4, a grouting pipe 4, a rubber plug seat 10 fixedly installed at the bottom of the grouting pipe 4, three annular grooves 7 are opened on the outer wall of the grouting pipe 4, grouting holes 8 are opened on the outer walls of the three annular grooves 7, the grouting holes 8 penetrate the grouting pipe 4, and a rubber sleeve 9 is elastically sleeved on the outer wall of the annular groove 7.
[0020] The design of setting the rubber plug seat 10 can enhance the sealing of the bottom of the grouting pipe 4 to prevent leakage during the grouting process. The design of the annular groove 7 and the grouting hole 8 makes the grouting pipe 4 have a more uniform grouting ability. During the grouting process, the slurry can be evenly injected into the formation through the grouting hole 8, thereby achieving a uniform grouting effect. In addition, the rubber sleeve 9 elastically sleeved on the outer wall of the annular groove 7: the design of the rubber sleeve 9 can provide additional sealing and protection. When grouting starts, the slurry inside the grouting pipe 4 gradually increases under the action of pressure. This pressure will force the rubber sleeve 9 to expand, allowing the slurry to flow out of the grouting hole 8 on the annular groove 7, thereby effectively injecting the slurry into the formation that needs to be reinforced or lifted. When the grouting process is completed, the grouting The pressure inside the pipe 4 gradually decreases, and the rubber sleeve 9 will shrink and recover due to its own elasticity. This process is automatic and does not require human intervention or external operation. The shrunken rubber sleeve 9 will fit tightly against the outer wall of the annular groove 7, completely blocking the grouting hole 8. This can effectively avoid slurry overflow caused by pressure differences inside and outside the pipe or other reasons after the grouting is completed, thereby ensuring the durability and stability of the grouting effect, not only improving the efficiency of the grouting process, but also ensuring the reliability of the grouting effect. Through the automatic expansion and contraction of the rubber sleeve 9, the grouting pipe 4 realizes the dynamic sealing and release functions during the grouting process, and through deep drilling high-pressure grouting technology, it can reinforce the underground rock formation, reduce the risk of surface collapse, and protect the safety of the surface environment and surrounding facilities.
[0021] The staff first drills a hole of a predetermined depth and diameter in the bedrock 1, and sets up a fixed pipe 2, fills concrete slurry between the hole groove and the fixed pipe 2, so that the concrete slurry can stabilize the fixed pipe 2 after being formed, and then drills through to the target grouting layer 3, and lowers the assembled grouting pipe system into the borehole, ensuring that the bottom plug seat 10 of the grouting pipe 4 is located at the top of the target grouting layer 3, and injects slurry into the formation through the grouting pipe system. The slurry flows into the formation through the grouting hole 8 under pressure to achieve grouting reinforcement. When the grouting operation is completed, the grouting equipment is turned off. Due to the elasticity of the rubber sleeve 9, the grouting hole 8 will be automatically closed to prevent the slurry from overflowing. After the grouting is completed, necessary post-processing is carried out, such as cleaning the grouting equipment and checking the grouting effect.
[0022] Among them, the top thread of grouting pipe 1 4 is installed with grouting pipe 2 14 , and the top thread of grouting pipe 2 14 is installed with grouting pipe 3 13 .
[0023] Through threaded connection, it can ensure that each grouting pipe is firmly connected and not easily loosened due to external pressure or vibration. This stability is crucial for the high-pressure grouting process and can ensure the smooth progress of the grouting process and the maximization of the grouting effect. Compared with traditional devices, the requirements for grouting volume and grouting pressure are different for different engineering projects. The threaded connection method allows the number and combination of grouting pipes to be flexibly adjusted. Construction personnel can add or reduce the number of grouting pipes according to actual engineering needs to avoid wasting materials, ensure the efficient progress of the grouting project and the realization of the best grouting effect. Flexible configuration also helps to optimize cost-effectiveness, thereby improving the overall economy of the project.
[0024] The staff first assembles the grouting pipe 1 4 , the grouting pipe 2 14 , and the grouting pipe 3 13 according to the design requirements, and ensures that the connection between the components is firm and sealed.
[0025] Among them, a flange 11 is fixedly installed on the top of the grouting pipe 3 13, and a flange 2 12 is arranged on the top of the flange 11.
[0026] By providing a flange 11, a high connection strength of the structure is ensured. This connection method can withstand the high pressure and impact force generated during the grouting process, and is also convenient for maintenance and replacement of parts.
[0027] Among them, a target grouting layer 3 is arranged on the outside of the grouting pipe 1 4, a solid pipe 2 is arranged on the top of the target grouting layer 3, bedrock 1 is arranged on the outside of the solid pipe 2 and the target grouting layer 3, a flange 11 is fixedly installed on the top of the solid pipe 2, and the flange 11 is fixedly connected with the flange 2 12 by a bolt and nut assembly 15.
[0028] By setting up the target grouting layer 3, it can be ensured that the grouting material can be accurately transported to the stratum area that needs to be reinforced or lifted, so as to achieve precise grouting and improve the project efficiency and quality; concrete slurry is filled into the gap between the solid pipe 2 and the bedrock 1, which provides strong support and protection for the grouting pipe, ensures the stability of the grouting pipe during the grouting process, and prevents it from being displaced or deformed due to external forces; the close combination of the target grouting layer 3 and the solid pipe 2, as well as the wrapping of the bedrock 1, form a good sealing environment, effectively prevent the leakage of the grouting liquid during the grouting process, and ensure the grouting effect.
[0029] Among them, the top inner walls of the grouting pipe 1 4 and the grouting pipe 2 14 are respectively provided with a thread groove 2 6, and the bottom outer walls of the grouting pipe 2 14 and the grouting pipe 3 13 are respectively provided with a thread groove 1 5, and the thread groove 1 5 and the thread groove 2 6 are adapted to each other.
[0030] By tightening the thread groove 1 5 and the thread groove 2 6, each grouting pipe can be tightly connected, effectively preventing the pipe body from separating or leaking due to excessive pressure during the grouting process.
[0031] The working principle and use process of this utility model:
[0032] The staff first assembles the grouting pipe 1 4, the grouting pipe 2 14, and the grouting pipe 3 13 according to the design requirements, and ensures that the connection between the components is firm and sealed. Then, a borehole of a predetermined depth and diameter is drilled in the bedrock 1, and a fixed pipe 2 is set. Concrete slurry is filled between the hole groove and the fixed pipe 2 to stabilize the fixed pipe 2 after the concrete slurry is formed. Then, a hole is drilled to pass through the target grouting layer 3, and the assembled grouting pipe system is lowered into the borehole to ensure that the bottom rubber plug seat 10 of the grouting pipe 1 4 is located at the top of the target grouting layer 3. Slurry is injected into the formation through the grouting pipe system. The slurry flows into the formation through the grouting hole 8 under pressure, which can reinforce the underground rock formation, reduce the risk of surface collapse, and protect the safety of the surface environment and surrounding facilities. When the grouting reinforcement grouting operation is completed, the grouting equipment is turned off. Due to the elasticity of the rubber sleeve 9, the grouting hole 8 will be automatically closed to prevent the slurry from overflowing. After the grouting is completed, necessary post-processing is carried out, such as cleaning the grouting equipment and checking the grouting effect.
[0033] 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.
[0034] 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 double casing structure for high pressure grouting to elevate the strata in deep drilling of coal mines, comprising a grouting pipe (4), characterized in that: The grouting pipe (4) is provided with a rubber plug seat (10) fixedly mounted at the bottom thereof, three annular grooves (7) are provided on the outer wall of the grouting pipe (4), grouting holes (8) are provided on the outer walls of the three annular grooves (7), the grouting holes (8) penetrate the grouting pipe (4), and a rubber sleeve (9) is elastically sleeved on the outer wall of the annular groove (7).
2. The double casing structure for high pressure grouting to elevate the strata in deep drilling of coal mines according to claim 1 is characterized by: The top thread of the grouting pipe one (4) is installed with the grouting pipe two (14), and the top thread of the grouting pipe two (14) is installed with the grouting pipe three (13).
3. The double casing structure for high pressure grouting to elevate the strata in deep drilling of coal mines according to claim 2 is characterized by: A flange 2 (12) is fixedly mounted on the top of the grouting pipe 3 (13).
4. The double casing structure for high pressure grouting to elevate the strata in deep drilling of coal mines according to claim 3 is characterized by: A target grouting layer (3) is arranged outside the grouting pipe (4), a fixed pipe (2) is arranged on the top of the target grouting layer (3), bedrock (1) is arranged outside the fixed pipe (2) and the target grouting layer (3), a flange (11) is fixedly installed on the top of the fixed pipe (2), and the flange (11) and flange (12) are fixedly connected by a bolt and nut assembly (15).
5. The double casing structure for high pressure grouting to elevate the strata in deep drilling of coal mines according to claim 1 is characterized by: The top inner walls of the grouting pipe 1 (4) and the grouting pipe 2 (14) are respectively provided with a thread groove 2 (6), and the bottom outer walls of the grouting pipe 2 (14) and the grouting pipe 3 (13) are respectively provided with a thread groove 1 (5), and the thread groove 1 (5) and the thread groove 2 (6) are adapted to each other.