Blast hole blocking device for tunnel drilling and blasting construction

Abstract

The utility model provides a blast hole blocking device for tunnel drilling and blasting construction. The blast hole blocking device comprises a main rod, a blocking barrel, an elastic liquid bag and a hole sealing plate. Threads are formed on at least part of the periphery of the main rod; the periphery of the main rod is sleeved with the blocking cylinder. The elastic liquid bag is arranged on the periphery of the blocking barrel, and the elastic liquid bag is suitable for being filled with liquid to expand outwards in the radial direction; the hole sealing plate is rotatably arranged on the periphery of the main rod in a sleeving manner and is connected with the threads in a matched manner; wherein the main rod is suitable for driving the blocking barrel and the elastic liquid bag to extend into a blast hole, and the elastic liquid bag blocks the blast hole after expanding; and the hole sealing plate is suitable for sealing the end opening of the blast hole. The elastic liquid bag can tightly block a gap between the periphery of the blocking barrel and the wall of the blast hole, and by combining the blocking effect of the hole sealing plate, the air tightness of blocking is remarkably enhanced, the blocking quality of the blast hole is improved, and therefore the explosive energy utilization rate can be increased, and the blasting quality is improved; the application range is wide, and operation is easy and convenient.

Description

Technical Field

[0001] This application relates to the field of tunnel blasting technology, and in particular to a blast hole plugging device for tunnel drilling and blasting construction. Background Technology

[0002] In underground rock blasting, the drill-and-blast method is widely used in the construction of tunnels in hard rock, fractured rock, and many short tunnels due to its advantages such as wide geological adaptability and relatively low excavation costs. Hole plugging is a crucial step in drill-and-blast construction. Good plugging quality enhances the resistance of the borehole opening, prevents explosive gas products from prematurely escaping from the borehole, ensures the borehole remains under high pressure until the rock mass fractures, prolongs the action time of the explosive gas, and achieves the desired blasting effect.

[0003] In related technologies, taphole plugging is typically made from crushed stone, soil, and other materials found at the construction site. However, these traditional taphole plugs are mostly loose materials with poor adhesion. When used for plugging, they easily scatter into the charging section of the borehole, potentially causing "blowout" during blasting and resulting in unsatisfactory blasting results. Furthermore, existing borehole plugging devices are difficult to secure in downward-facing or inclined boreholes, also leading to poor plugging quality. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this application is to provide a borehole plugging device for tunnel drilling and blasting construction, thereby improving the plugging quality of the boreholes.

[0005] This application discloses a borehole plugging device for tunnel drilling and blasting construction. The borehole plugging device includes a main rod, a plug cylinder, an elastic liquid bag, and a sealing plate. At least a portion of the outer periphery of the main rod is threaded. The plug cylinder is sleeved on the outer periphery of the main rod. The elastic liquid bag is disposed on the outer periphery of the plug cylinder and is adapted to be filled with liquid to expand radially outward. The sealing plate is rotatably sleeved on the outer periphery of the main rod and is threadedly connected. The main rod is adapted to drive the plug cylinder and the elastic liquid bag into the borehole, and the elastic liquid bag expands to plug the borehole. The sealing plate is adapted to form a seal at the port of the borehole.

[0006] According to the borehole plugging device of this application, since an elastic liquid bag that can be filled and expanded is set on the outer periphery of the plugging cylinder, it can tightly block the gap between the outer periphery of the plugging cylinder and the borehole wall. Combined with the sealing effect of the sealing plate, it significantly enhances the airtightness of the plugging and improves the plugging quality of the borehole, thereby improving the energy utilization rate of explosives and improving the blasting quality. The direction of the borehole to which this application is applicable is arbitrary, and it is adaptable to different borehole sizes. It can be applied to boreholes that are set downward or inclined, and has a wide range of applications. It is simple and convenient to operate.

[0007] According to some embodiments of this application, the borehole plugging device further includes a liquid inlet hose, one end of which is connected to an elastic liquid bag; the sealing plate has a through hole, and the other end of the liquid inlet hose passes through the through hole to extend out of the borehole.

[0008] According to some embodiments of this application, a one-way stop valve is provided on the liquid inlet hose.

[0009] According to some embodiments of this application, the outer periphery of the elastic liquid bag is formed with anti-slip texture.

[0010] According to some embodiments of this application, a portion of the elastic fluid bag covers the end of the plug cylinder that extends into the borehole.

[0011] According to some embodiments of this application, a baffle is provided at one end of the main rod that extends into the blast hole.

[0012] According to some embodiments of this application, the diameter of the baffle is equal to the diameter of the borehole.

[0013] According to some embodiments of this application, the sealing plate is formed with a connecting portion adapted to selectively connect with the rock wall surrounding the borehole to restrict the movement of the sealing plate.

[0014] According to some embodiments of this application, a fastener is provided on the main rod, the fastener being threadedly connected and adapted to restrict the relative movement of the sealing plate and the main rod.

[0015] According to some embodiments of this application, the main rod is provided with scale lines to display the relative position of the main rod and the blast hole, as well as the relative position of the sealing plate and the main rod.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a borehole plugging device according to some embodiments of this application;

[0019] Figure 2 This is a cross-sectional view showing the connection between the elastic liquid bag and the plug according to some embodiments of this application.

[0020] Figure label:

[0021] Main rod 1; plug cylinder 2; elastic liquid bag 3; sealing plate 4; baffle 5; liquid inlet hose 6; one-way stop valve 7; fastener 8; screw 9; scale line 10; operating handle 11; water supply connector 12; wire channel 13. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] The following is for reference. Figures 1-2 This application describes a borehole plugging device for tunnel drilling and blasting operations according to an embodiment of the present application.

[0024] This application proposes a borehole plugging device for tunnel drilling and blasting construction. The borehole plugging device includes a main rod 1, a plug cylinder 2, an elastic liquid bag 3, and a sealing plate 4. At least a portion of the outer periphery of the main rod 1 is threaded. The plug cylinder 2 is sleeved on the outer periphery of the main rod 1. The elastic liquid bag 3 is disposed on the outer periphery of the plug cylinder 2 and is adapted to be filled with liquid to expand radially outward. The sealing plate 4 is rotatably sleeved on the outer periphery of the main rod 1 and threadedly connected. The main rod 1 is adapted to drive the plug cylinder 2 and the elastic liquid bag 3 into the borehole, and the elastic liquid bag 3 expands to plug the borehole. The sealing plate 4 is adapted to form a seal at the port of the borehole.

[0025] According to the borehole plugging device of this application, the main rod 1 can drive the plugging cylinder 2 and the elastic liquid bag 3 into the borehole. Filling the elastic liquid bag 3 with liquid causes it to expand radially, filling the gap between the outer periphery of the plugging cylinder 2 and the borehole wall, thus enhancing the airtightness of the plugging. Simultaneously, the elasticity of the elastic liquid bag 3 allows it to be used with boreholes of different diameters, improving the device's adaptability. After the detonation wave generated by the explosion damages the elastic liquid bag 3, the liquid flowing out of the elastic liquid bag 3 can reduce the smoke and dust generated by the explosion, conforming to the concept of green and environmentally friendly construction. Moreover, the movement and installation of the plugging cylinder 2 and the elastic liquid bag 3 by the main rod 1 is arbitrary and applicable to boreholes in different directions. Furthermore, the sealing plate 4 can seal the borehole port. The sealing plate 4 is threadedly connected to the main rod 1, allowing the sealing plate 4 to move relative to the main rod 1 after the plugging cylinder 2 is inserted to the target position, adjusting its axial position on the main rod 1 and connecting with the rock wall at the borehole port to achieve a good sealing effect.

[0026] It should be noted that, in its natural state, the outer diameter of the elastic liquid bag 3 after being filled and expanded is larger than the inner diameter of the borehole. After being filled and expanded inside the borehole, it is restricted by the inner wall of the borehole and adheres tightly to the inner wall of the borehole to achieve a tight seal. The elastic liquid bag 3 is subjected to high liquid pressure and generates an interaction force with the inner wall of the borehole. Therefore, while the elastic liquid bag 3 is tightly sealing, it also has a large friction force with the inner wall of the borehole, which can effectively prevent it from slipping out of the borehole.

[0027] According to the borehole plugging device of this application, since an elastic liquid bag 3 that can be filled and expanded is provided on the outer periphery of the plugging cylinder 2, the gap between the outer periphery of the plugging cylinder 2 and the borehole wall can be tightly sealed. Combined with the sealing effect of the sealing plate 4, the airtightness of the plugging is significantly enhanced, the plugging quality of the borehole is improved, thereby improving the energy utilization rate of explosives and improving the blasting quality. The direction of the borehole to which this application is applicable is arbitrary, and it is adaptable to different borehole sizes. It can be applied to boreholes that are set downward or inclined, with a wide range of applications and simple and convenient operation.

[0028] In some embodiments, when the elastic liquid bag 3 is unfilled, the outer diameter of the plug 2 and the elastic liquid bag 3 as a whole is equal to the diameter of the borehole. This embodiment can ensure that the borehole plugging device has a small preset gap with the inner wall of the borehole, reducing the expansion requirements of the elastic liquid bag 3, and can still achieve a good plugging effect after the elastic liquid bag 3 is damaged.

[0029] According to some embodiments of this application, the borehole plugging device further includes a liquid inlet hose 6, one end of which is connected to the elastic liquid bag 3; the sealing plate 4 has a through hole, and the other end of the liquid inlet hose 6 passes through the through hole to extend out of the borehole. In this embodiment, by providing a path for replenishing the elastic liquid bag 3 with liquid by setting the liquid inlet hose 6, and by setting the liquid inlet hose 6 through the sealing plate 4, the sealing effect of the sealing plate 4 can be avoided when the liquid inlet hose 6 bypasses the sealing plate 4. In addition, the liquid inlet hose 6 can be adaptively deformed without affecting the rotation of the sealing plate 4 relative to the main rod 1. In some embodiments, a water supply connector 12 is provided at the end of the liquid inlet hose 6 that extends out of the borehole through the sealing plate 4 to facilitate connection with a liquid supply device or liquid source. In some embodiments, the liquid filled in the elastic liquid bag 3 is water, which is clean and readily available.

[0030] According to some embodiments of this application, a one-way stop valve 7 is provided on the liquid inlet hose 6. In this embodiment, by providing the one-way stop valve 7, it can be ensured that there is no backflow when liquid is filled into the elastic liquid bag 3, ensuring that the elastic liquid bag 3 will not depressurize, so that the elastic liquid bag 3 can meet the high-pressure expansion requirements.

[0031] According to some embodiments of this application, the outer periphery of the elastic liquid bag 3 is formed with anti-slip textures. In this embodiment, by providing anti-slip textures, the friction between the elastic liquid bag 3 and the inner wall of the borehole can be increased, making it better resist the impact of the explosion and preventing it from slipping out of the borehole.

[0032] In some embodiments, the elastic liquid bag 3 is made of highly elastic and tough rubber, which has good sealing properties and is not easily scratched or punctured by structures such as rocks on the inner wall of the borehole.

[0033] According to some embodiments of this application, the elastic liquid bag 3 partially covers the end of the plug 2 that extends into the borehole. In this embodiment, while partially surrounding the outer periphery of the plug 2, the elastic liquid bag 3 also partially covers the end of the plug 2 that extends into the borehole, which can improve the sealing effect and at the same time provide a certain degree of protection for the plug 2.

[0034] According to some embodiments of this application, a baffle 5 is provided at the end of the main rod 1 that extends into the blast hole. In this embodiment, the baffle 5 provides a certain degree of protection for the blast hole plugging device. The baffle 5 is located on the side of the plugging cylinder 2 near the depth of the blast hole. The high-temperature and high-pressure gas generated by the explosion first impacts and damages the baffle 5. The baffle 5 can provide a certain degree of protection for the plugging cylinder 2 and other structures on its outer side. Furthermore, the baffle 5 is easy to replace, facilitating repeated use of the device and saving costs. In some embodiments, the baffle 5 is connected to the main rod 1 by a thread.

[0035] According to some embodiments of this application, the diameter of the baffle 5 is equal to the diameter of the blast hole. In this embodiment, the baffle 5 having the same diameter as the blast hole provides more effective protection and also achieves a certain degree of blast hole sealing.

[0036] According to some embodiments of this application, the sealing plate 4 has a connecting portion adapted to selectively connect with the rock wall surrounding the blast hole to restrict the movement of the sealing plate 4. In this embodiment, connecting the sealing plate 4 with the rock wall surrounding the blast hole can restrict the position of the blast hole plugging device during blasting, preventing the blast hole plugging device from sliding out of the blast hole under the impact of blasting gas, thereby ensuring the plugging effect and improving the blasting quality. In some embodiments, the connecting portion is constructed as a threaded hole, and the sealing plate 4 is fixedly connected to the rock wall by screws 9.

[0037] According to some embodiments of this application, a fastener 8 is provided on the main rod 1. The fastener 8 is threadedly connected and adapted to restrict the relative movement of the sealing plate 4 and the main rod 1. In this embodiment, by providing the fastener 8, the relative position of the sealing plate 4 and the main rod 1 can be restricted. When the sealing plate 4 is fixedly connected to the rock wall, it is ensured that the main rod 1 will not move relative to the sealing plate 4, thereby ensuring that the structure of the borehole plugging device of this application will not shift within the borehole, ensuring a stable and effective plugging effect. In some embodiments, the fastener 8 is constructed as a nut.

[0038] In some embodiments, the sealing plate 4 is further provided with an operating handle 11 to facilitate rotating the sealing plate 4 to adjust its position in the axial direction of the main rod 1. After the relative position of the sealing plate 4 and the main rod 1 is determined, it is limited by the fasteners 8 described above.

[0039] According to some embodiments of this application, the main rod 1 is provided with scale lines 10 to display the relative position of the main rod 1 and the blast hole, as well as the relative position of the sealing plate 4 and the main rod 1. In this embodiment, the scale facilitates the operator's adjustment and recording of the length of the blast hole plugging device inserted into the blast hole, making the blast hole plugging operation more controllable and precise.

[0040] According to some embodiments of this application, a wire channel 13 is formed inside the main rod 1. In some application scenarios, the borehole plugging device also needs to be equipped with a detection component to monitor the information inside the borehole or the installation process of the borehole plugging device. The detection component requires a connecting wire. In this embodiment, by setting the wire channel 13 inside the main rod 1, a channel for the connecting wire can be provided, avoiding the connecting wire from affecting the sealing effect of structures such as the elastic liquid bag 3 and the sealing plate 4. Moreover, the wire channel 13 facilitates sealing, which can ensure the overall sealing effect of this application.

[0041] The main operating steps for using the borehole plugging device of this application are as follows:

[0042] Step 1: Install the elastic liquid bag 3 on the outside of the plug 2, and connect the liquid inlet hose 6 to the elastic liquid bag 3;

[0043] Step 2: Lead the connecting wire out from the wire channel 13 inside the main rod 1;

[0044] Step 3: Push the main rod 1 into the borehole, observe the position of the scale line 10, and ensure that the device reaches the designated position; then tighten the nut on the main rod 1 to fix the position of the device inside the borehole; then tighten the screw 9 on the sealing plate 4 to fix the sealing plate 4 to the rock wall around the borehole opening.

[0045] Step 4: Connect the water supply connector 12 to an external water source and supply water into the elastic liquid bag 3 through the liquid inlet hose 6. The elastic liquid bag 3 will expand and tightly seal the gap between the plug cylinder 2 and the inner wall of the blast hole. Stop the water injection when the required high pressure expansion is reached, thus completing the high-quality and effective plugging of the blast hole.

[0046] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0048] In the description of this application, "multiple" means two or more.

[0049] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0050] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A blast hole plugging device for use in tunnel drilling and blasting operations, characterised in that, include: The main rod, at least a portion of the outer periphery of which is threaded; A plug sleeve, wherein the plug sleeve is fitted around the outer periphery of the main rod; An elastic liquid bag is disposed on the outer periphery of the plug cylinder, and the elastic liquid bag is adapted to be filled with liquid to expand radially outward; A sealing plate, which is rotatably sleeved on the outer periphery of the main rod and threadedly connected to it; in The main rod is adapted to drive the plug and the elastic liquid bag into the borehole, and the elastic liquid bag expands to block the borehole; the sealing plate is adapted to form a seal at the port of the borehole.

2. The stemming device for tunnel drilling and blasting construction according to claim 1, characterized in that, Also includes: A liquid inlet hose, one end of which is connected to the elastic liquid bag; The sealing plate has a through hole, and the other end of the liquid inlet hose passes through the through hole to extend out of the borehole.

3. The stemming device for use in the tunnel blast excavation according to claim 2, characterized in that, The inlet hose is equipped with a one-way stop valve.

4. The stemming device for use in tunnel blasting operations according to claim 1, wherein The outer periphery of the elastic liquid bag is formed with anti-slip ridges.

5. The stemming device for use in tunnel blasting operations according to claim 1, wherein, The elastic fluid bag partially covers the end of the plug cylinder that extends into the borehole.

6. The stemming device for use in tunnel blasting operations according to claim 1, wherein, A baffle is provided at the end of the main rod that extends into the blast hole.

7. The blast hole plugging device for tunnel drilling and blasting construction according to claim 6, characterized in that, The diameter of the baffle is equal to the diameter of the borehole.

8. The stemming device for use in tunnel blasting operations according to claim 1, wherein, The sealing plate has a connecting portion adapted to selectively connect with the rock wall surrounding the borehole to restrict movement of the sealing plate.

9. The stemming device for use in the tunnel blast excavation according to claim 8, characterized in that, The main rod is provided with fasteners, which are threadedly connected to the main rod and are adapted to restrict the relative movement of the sealing plate and the main rod.

10. The stemming device for use in tunnel blasting operations according to claim 1, wherein, The main rod is provided with scale lines to display the relative position of the main rod and the blast hole, as well as the relative position of the sealing plate and the main rod.

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