Method for quickly sealing water-passing roadway

Abstract

The application relates to a method for quickly plugging a water-passing roadway, and relates to the technical field of mine roadway plugging. The method can play a water-blocking role, can support the stability of the overall throwing aggregate, and can effectively avoid the situation that a large amount of aggregate is lost under the condition of high flow velocity or increased flow velocity, effectively guarantee the effectiveness of aggregate filling, avoid material waste and ineffective construction, and improve the aggregate accumulation efficiency.

Description

Technical Field

[0001] This application relates to the field of mine roadway sealing technology, and in particular to a method for quickly sealing water-filled roadways. Background Technology

[0002] In underground engineering projects such as mines and tunnels, the challenge of quickly sealing water-filled tunnels is frequently encountered. Especially under conditions of high pressure and high flow of water, achieving effective and rapid sealing is crucial to ensuring the safety and smooth progress of the project.

[0003] Currently, the common method for sealing water-passing tunnels is to use aggregate throwing and filling followed by grouting. The tunnel is opened by directional drilling, and then aggregates such as sand and gravel are thrown into the tunnel to form an accumulation body, reducing the cross-section of the water passage. Finally, the aggregate accumulation body is reinforced by grouting to form a stable sealing body.

[0004] However, in practical applications, during the initial aggregate throwing stage, as the aggregate accumulation height increases, the local water flow velocity increases sharply, making it easy for conventional aggregates to be washed away. This prevents the sealing height from being effectively increased, resulting in low accumulation efficiency. Furthermore, due to the borehole diameter limitations, larger rock particles or heavy materials cannot be placed, making it difficult to sustain the aggregate accumulation effect. In areas with high water flow velocity, the aggregate cannot accumulate properly, making it difficult to achieve a proper seal and ensuring an effective sealing effect. Summary of the Invention

[0005] To address or partially address the problems existing in related technologies, this application provides a method for rapidly sealing water-passing tunnels, which can improve aggregate accumulation efficiency and effectively ensure sealing results.

[0006] This application provides a method for quickly sealing water-filled tunnels, the method comprising at least the following steps: S1: Initial deployment of slurry-retaining bags. Flow velocity sensors are deployed at the downstream position of the target water passage to monitor the water flow velocity in the passage section in real time. Slurry-retaining bags that can deform and expand under the action of water flow are deployed at the upstream and downstream positions of the target water passage to establish upstream and downstream slurry-retaining bag groups. S2: Aggregate throwing, aggregate throwing is carried out in the roadway section between the upstream and downstream slurry bag groups; S3: Aggregate height detection. After each batch of aggregate is thrown, the drilling depth is used to detect the aggregate accumulation height in the bottom tunnel. S4: Refilling of grout-retaining bags: When no increase in aggregate accumulation height is detected, grout-retaining bags are thrown to refill the bags. S5: Water-absorbing expansion bag throwing: After detecting aggregate contact with the top, water-absorbing expansion bags are thrown to fill the gaps. S6: Grouting and sealing. After the flow velocity in the downstream of the detection tunnel decreases, grouting is performed to form a complete seal.

[0007] Optionally, in some embodiments of this application: In step S1, before throwing the grout-retaining bag, the water flow velocity in the water tunnel is detected by a flow velocity sensor, and the size of the grout-retaining bag is selected according to the water flow velocity. The grout-retaining bag group consists of multiple grout-retaining bags arranged at intervals along the horizontal direction of the roadway.

[0008] Optionally, in some embodiments of this application: Step S2 specifically includes: During the aggregate throwing process, based on the current water flow velocity detected by the flow velocity sensor and according to the starting condition model of aggregate particles in the water flow, the minimum particle size and minimum density of the aggregate that meet the filling requirements are calculated.

[0009] Optionally, in some embodiments of this application: The starting condition model is based on the principle of particle force balance. Its constraint is that the drag force of water flow acting on the aggregate particles is less than the maximum static friction force between the particles and the bed surface. The starting formulas for different particles under the action of dynamic water are calculated.

[0010] Optionally, in some embodiments of this application: Step S3 specifically includes: The height of aggregate accumulation at the bottom of the drilling exploration hole was compared and analyzed with the original through hole depth and the bottom depth to determine the height of the remaining space above the roadway. Select and lower a slurry-preserving bag of appropriate size based on the height of the remaining space.

[0011] Optionally, in some embodiments of this application: Step S4 specifically includes: If the aggregate accumulation height does not increase after detection, first adjust the size parameters of the thrown aggregate and continue throwing. If the accumulation height still does not increase, then perform the subsequent operation of throwing slurry retaining bags.

[0012] Optionally, in some embodiments of this application: The outer bag of the water-absorbing and expanding bag is made of geotextile, and the inside is sealed with water-absorbing and expanding material.

[0013] Optionally, in some embodiments of this application: Step S6 specifically includes: When the water flow velocity downstream of the water passage is detected to drop below a predetermined threshold, grouting is performed to form a complete seal.

[0014] Optionally, in some embodiments of this application: The grout-preserving bag is made of high-strength protective fabric and is shaped like a pocket. A grouting port and a grouting protection sleeve are provided at the top of the grout-preserving bag.

[0015] Optionally, in some embodiments of this application: The grout-retaining bag is filled with cement grout and mixed with steel grit for counterweight.

[0016] The technical solution provided in this application may include the following beneficial effects: This application utilizes upstream placement of grout-retaining bags to consume and reduce the kinetic energy of water flowing into the sealing area, initially reducing the impact of flowing water within the tunnel and mitigating the direct impact on subsequently thrown aggregates. Downstream drilling of grout-retaining bags also acts as a water barrier, supporting the aggregates flowing downstream, preventing them from being washed away, and constraining their accumulation range, thus providing overall stability for the thrown aggregates. Furthermore, by injecting cement grout and adding steel grit counterweights into the grout-retaining bags, they can deform and expand under the influence of water flow, further enhancing the volume and stability of the sealing operation.

[0017] This application, by installing a flow velocity sensor downstream, monitors the flow velocity changes caused by aggregate accumulation in real time, and adjusts the aggregate particle size and density in real time. This effectively avoids the loss of a large amount of aggregate under high flow velocity or increased flow velocity, effectively ensuring the effectiveness of aggregate filling, avoiding material waste and ineffective construction, and improving aggregate accumulation efficiency.

[0018] This application obtains the current aggregate accumulation elevation through drilling and compares it with known roadways. This allows for the accurate calculation of the remaining space to be filled in the upper part of the roadway, and the selection of grout-retaining bags of appropriate size. This effectively avoids incomplete filling and ensures full and tight filling of the roadway space. By using water-absorbing expansion bags, the gaps in the sealing area can be effectively filled, further improving the integrity and durability of the sealing.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0021] Figure 1 This is a schematic diagram of the structure of the method for quickly sealing water-passing tunnels in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the slurry-retaining bag in this embodiment. Detailed Implementation

[0022] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Currently, the common method for sealing water-passing tunnels is to use aggregate throwing and filling followed by grouting. The tunnel is opened by directional drilling, and then aggregates such as sand and gravel are thrown into the tunnel to form an accumulation body, reducing the cross-section of the water passage. Finally, the aggregate accumulation body is reinforced by grouting to form a stable sealing body.

[0027] However, in practical applications, during the initial aggregate throwing stage, as the aggregate accumulation height increases, the local water flow velocity increases sharply, making it easy for conventional aggregates to be washed away. This prevents the sealing height from being effectively increased, resulting in low accumulation efficiency. Furthermore, due to the borehole diameter limitations, larger rock particles or heavy materials cannot be placed, making it difficult to sustain the aggregate accumulation effect. In areas with high water flow velocity, the aggregate cannot accumulate properly, making it difficult to achieve a proper seal and ensuring an effective sealing effect.

[0028] To address the aforementioned issues, this application provides a method for rapidly sealing water-bearing tunnels, which can improve aggregate accumulation efficiency and effectively ensure sealing results.

[0029] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0030] Figure 1 This is a structural schematic diagram of the method for quickly sealing water-filled tunnels in the embodiments of this application.

[0031] See Figure 1 A method for quickly sealing a water-filled tunnel, the method comprising: S1: Initial deployment of slurry-retaining bags. Slurry-retaining bags are deployed at the upstream and downstream positions of the target water passage to establish a group of slurry-retaining bags. Specifically: Initial deployment of slurry-retaining bags involves setting up flow velocity sensors at the downstream position of the target water passage to monitor the water flow velocity in the passage section in real time, and deploying slurry-retaining bags that can deform and expand under the action of water flow at the upstream and downstream positions of the target water passage to establish upstream and downstream slurry-retaining bag groups. Specifically: The grout-preserving bag is made of high-strength protective fabric and is shaped like a pocket. A grouting port and a grouting protection sleeve are provided at the top of the grout-preserving bag.

[0032] See Figure 2 , Figure 2 This is a schematic diagram of the structure of the slurry-retaining bag in this embodiment.

[0033] In this embodiment, because the grout-retaining bag is made of high-strength protective fabric processed into a pocket shape, it is soft and easily deformable. Water can penetrate the protective fabric well, but cement particles are difficult to penetrate. By injecting a certain amount of cement grout into the grout-retaining bag, the grout-retaining bag can fully deform and expand under the pressure of the grout. Under the protection and restriction of the bag, the cement grout coagulates and forms a large-volume stone body, while the excess water inside the bag can seep out through the mold bag.

[0034] Specifically: Before throwing the grout-retaining bags, the flow velocity of the water in the water tunnel is detected by a flow velocity sensor, and the size of the grout-retaining bags is selected according to the flow velocity; The grout-retaining bag group consists of multiple grout-retaining bags arranged at intervals along the horizontal direction of the roadway.

[0035] In this embodiment, the greater the water flow velocity in the water passage, the larger the slurry retention bag is selected. When the water flow velocity is >2.5 m / s, it is judged to be a high flow velocity zone, and large-sized slurry retention bags are uniformly selected. The unfolded size of the slurry retention bag is approximately 3.2m (length) × 1.2m (diameter).

[0036] Specifically: Cement grout is injected into the grout-retaining bag and steel grit is added as a counterweight.

[0037] By adding steel shot to the slurry, the proportion of counterweight steel shot can be adjusted to achieve bag structures of different densities.

[0038] In this embodiment, two directional boreholes are drilled to locate the water-carrying tunnel area to be sealed. Grout-retaining bags are sequentially placed in the upstream borehole. The upstream bag group consumes and reduces the kinetic energy of the water flowing into the sealing area, initially reducing the impact of the flowing water inside the tunnel and mitigating the direct impact on subsequently thrown aggregate. Similarly, grout-retaining bags are sequentially placed in the downstream borehole. The downstream bag group serves two purposes: it blocks water flow and supports the aggregate flowing down from the upstream, preventing it from being washed away and constraining its accumulation range, thus providing overall stability for the thrown aggregate. Simultaneously, by injecting cement grout and adding steel grit as counterweights into the grout-retaining bags, the bags can deform and expand under the action of water flow, further enhancing the volume and stability of the sealing operation.

[0039] S2: Aggregate throwing, aggregate throwing is carried out in the roadway section between the upstream and downstream slurry bag groups; Specifically, during the aggregate throwing process, based on the current water flow velocity detected by the flow velocity sensor and according to the starting condition model of aggregate particles in the water flow, the minimum particle size and minimum density of the aggregate that meet the filling requirements are calculated.

[0040] Specifically: This starting condition model is based on the principle of particle force balance. Its constraint is that the drag force of the water flow acting on the aggregate particles is less than the maximum static friction force between the particles and the bed surface. The starting formulas for different particles under the action of dynamic water are calculated.

[0041] The calculation process of the starting formula for different particles under the action of moving water specifically includes: The effective gravity of aggregate particles underwater is: (1) The drag force acting on the aggregate particles is: (2) The upward force acting on the aggregate particles is: (3) To ensure proper aggregate particle packing, the following conditions must be met: (4) In the formula, The aggregate particle diameter is in mm. , These are the densities of aggregate particles and water, respectively, in kg / m³. , These are the drag force coefficient and the lift force coefficient, respectively; The average velocity of the water flow is given in m / s. The coefficient of sliding friction; The acceleration due to gravity is 9.8 m / s².

[0042] Substituting equations (1)-(4) into equation (5), we can obtain the starting speed of aggregate particles in a horizontal roadway: (5) In this embodiment, a flow velocity sensor is installed downstream to monitor changes in flow velocity caused by aggregate accumulation in real time. Then, based on the starting formula for aggregate in flowing water, the particle size of the thrown aggregate is adjusted in real time. Aggregate density It can effectively prevent the loss of aggregates under high flow rates or increased flow rates, effectively ensure the effectiveness of aggregate filling, avoid material waste and ineffective construction, and improve aggregate stacking efficiency.

[0043] S3: Aggregate height detection. After each batch of aggregate is thrown, the drilling depth is used to detect the aggregate accumulation height in the bottom tunnel. Specifically: The height of aggregate accumulation at the bottom of the drilling exploration hole is compared and analyzed with the original through hole depth and the bottom depth to determine the height of the remaining space above the roadway; Select and lower a slurry-preserving bag of appropriate size based on the height of the remaining space.

[0044] In this embodiment, the elevation of the current aggregate accumulation is obtained by drilling and compared with the known roadway. This allows for the accurate calculation of the height of the remaining space to be filled in the upper part of the roadway, and the selection of grout-retaining bags of appropriate size. This effectively avoids incomplete filling and ensures that the roadway space is filled fully and tightly.

[0045] S4: Refilling of grout-retaining bags: When no increase in aggregate accumulation height is detected, grout-retaining bags are thrown to refill the bags. Specifically, after detecting that the aggregate accumulation height has not increased, the size parameters of the thrown aggregate are first adjusted and the throwing continues. If the accumulation height still does not increase, the subsequent operation of throwing slurry retaining bags is then performed.

[0046] In this embodiment, by prioritizing the adjustment of aggregate parameters for filling, and utilizing low-cost aggregate materials, material waste can be avoided and construction costs can be reduced.

[0047] S5: Water-absorbing expansion bag throwing: After detecting aggregate contact with the top, water-absorbing expansion bags are thrown to fill the gaps. Specifically: The water-absorbing and expanding bag is made of geotextile and has an interior of water-absorbing and expanding material.

[0048] In this embodiment, the geotextile outer bag of the water-absorbing and expanding bag is permeable, and the water-absorbing and expanding material encapsulated inside expands in volume when it comes into contact with water. It can actively squeeze into and compact the sealing body, effectively filling the gaps in the sealing area, and further improving the integrity and durability of the sealing.

[0049] S6: Grouting and sealing. After the flow velocity in the downstream of the detection tunnel decreases, grouting is performed to form a complete seal.

[0050] Specifically: when the water flow velocity downstream of the water passage is detected to drop below a predetermined threshold, grouting is performed to form a complete seal.

[0051] In this embodiment, when the downstream flow velocity drops below a predetermined threshold, it indicates that the water inflow channel has been basically blocked and the water flow has been significantly blocked. Under this condition, grouting can be carried out, and the grout can effectively penetrate, fill and bond in the formed porous sealing skeleton, thereby improving the success rate of grouting and the utilization rate of materials.

[0052] The technical solution provided in this application has the following beneficial effects: This application utilizes upstream placement of grout-retaining bags to consume and reduce the kinetic energy of water flowing into the sealing area, initially reducing the impact of flowing water within the tunnel and mitigating the direct impact on subsequently thrown aggregates. Downstream drilling of grout-retaining bags also acts as a water barrier, supporting the aggregates flowing downstream, preventing them from being washed away, and constraining their accumulation range, thus providing overall stability for the thrown aggregates. Furthermore, by injecting cement grout and adding steel grit counterweights into the grout-retaining bags, they can deform and expand under the influence of water flow, further enhancing the volume and stability of the sealing operation.

[0053] This application, by installing a flow velocity sensor downstream, monitors the flow velocity changes caused by aggregate accumulation in real time, and adjusts the aggregate particle size and density in real time. This effectively avoids the loss of a large amount of aggregate under high flow velocity or increased flow velocity, effectively ensuring the effectiveness of aggregate filling, avoiding material waste and ineffective construction, and improving aggregate accumulation efficiency.

[0054] This application obtains the current aggregate accumulation elevation through drilling and compares it with known roadways. This allows for the accurate calculation of the remaining space to be filled in the upper part of the roadway, and the selection of grout-retaining bags of appropriate size. This effectively avoids incomplete filling and ensures full and tight filling of the roadway space. By using water-absorbing expansion bags, the gaps in the sealing area can be effectively filled, further improving the integrity and durability of the sealing.

[0055] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0056] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0057] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the various embodiments of this application.

[0058] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for rapidly sealing water-carrying tunnels, characterized in that, The method includes at least the following steps: S1: Initial deployment of slurry-retaining bags. Flow velocity sensors are deployed at the downstream position of the target water passage to monitor the water flow velocity in the passage section in real time. Slurry-retaining bags that can deform and expand under the action of water flow are deployed at the upstream and downstream positions of the target water passage to establish upstream and downstream slurry-retaining bag groups. S2: Aggregate throwing, aggregate throwing is carried out in the roadway section between the upstream and downstream slurry bag groups; S3: Aggregate height detection. After each batch of aggregate is thrown, the drilling depth is used to detect the aggregate accumulation height in the bottom tunnel. S4: Refilling of grout-retaining bags: When no increase in aggregate accumulation height is detected, grout-retaining bags are thrown to refill the bags. S5: Water-absorbing expansion bag throwing: After detecting aggregate contact with the top, water-absorbing expansion bags are thrown to fill the gaps. S6: Grouting and sealing. After the flow velocity in the downstream of the detection tunnel decreases, grouting is performed to form a complete seal.

2. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: In step S1, before throwing the grout-retaining bag, the water flow velocity in the water tunnel is detected by a flow velocity sensor, and the size of the grout-retaining bag is selected according to the water flow velocity. The slurry-retaining bag group includes multiple slurry-retaining bags arranged at intervals along the horizontal direction of the roadway.

3. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: Step S2 specifically includes: During the aggregate throwing process, based on the current water flow velocity detected by the flow velocity sensor and according to the starting condition model of aggregate particles in the water flow, the minimum particle size and minimum density of the aggregate that meet the filling requirements are calculated.

4. The method for rapidly sealing water-passing tunnels according to claim 3, characterized in that: The starting condition model is based on the principle of particle force balance. Its constraint is that the water flow drag force acting on the aggregate particles is less than the maximum static friction force between the particles and the bed surface. The starting formulas for different particles under the action of dynamic water are calculated.

5. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: Step S3 specifically includes: The height of aggregate accumulation at the bottom of the drilling exploration hole was compared and analyzed with the original through hole depth and the bottom depth to determine the height of the remaining space above the roadway. Select and lower a slurry-preserving bag of the appropriate size based on the height of the remaining space.

6. The method for rapidly sealing water-passing tunnels according to claim 5, characterized in that: Step S4 specifically includes: If the aggregate accumulation height does not increase after detection, first adjust the size parameters of the thrown aggregate and continue throwing. If the accumulation height still does not increase, then perform the subsequent operation of throwing slurry retaining bags.

7. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: The outer bag of the water-absorbing and expanding bag is made of geotextile, and the inside is sealed with water-absorbing and expanding material.

8. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: Step S6 specifically includes: When the water flow velocity downstream of the water passage is detected to drop below a predetermined threshold, grouting is performed to form a complete seal.

9. The method for rapidly sealing water-passing tunnels according to claim 1, characterized in that: The grout-retaining bag is made of high-strength protective fabric and is shaped like a pocket. A grouting port and a grouting protection sleeve are provided at the top of the grout-retaining bag.

10. The method for rapidly sealing water-passing tunnels according to claim 9, characterized in that: The grout-retaining bag is filled with cement grout and mixed with steel grit for counterweight.

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