A borehole plug device and method of use

Abstract

The application discloses a blast hole plugging device and a use method. The blast hole plugging device is applied to a plugging section of a blast hole. The blast hole plugging device comprises a supporting assembly and a blocking rod. The supporting assembly comprises a base and a middle shaft rod. The base is connected with the middle shaft rod. When the supporting assembly is located in the plugging section, the middle axis of the middle shaft rod is parallel to or coincides with the middle axis of the plugging section. The blocking rod is arranged on the middle shaft rod. A plurality of blocking rods are arranged along the axial direction of the middle shaft rod. The projections of the plurality of blocking rods on the base form an included angle. The included angle is greater than 0°. When the supporting assembly is located in the plugging section, the base and the blocking rod enclose a blocking space in the plugging section.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering technology, and more specifically, to a borehole plugging device and its usage method. Background Technology

[0002] Drilling and blasting is a primary method of rock excavation. In drill-and-blast construction, borehole plugging is a crucial step. Effective borehole plugging not only prolongs the contact time of the explosive gases, improving rock-breaking efficiency, but also significantly reduces the risk of flyrock from blasting.

[0003] For the sake of readily available materials and ease of construction, borehole cuttings are often used for plugging in actual construction. Borehole cuttings are typical granular materials, and the plugging structure they form is relatively loose. Under the action of detonation products, they are easily compressed and deformed, which reduces the effective plugging length accordingly. In addition, their overall strength is low, making them prone to local damage. This causes detonation products to leak prematurely from the local damage site, reducing the time for detonation products to break through the rock. This not only seriously affects the blasting effect but also increases construction costs.

[0004] Therefore, how to improve the plugging effect of blast holes is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One objective of this application is to provide a new technical solution for a borehole plugging device.

[0006] According to a first aspect of this application, a borehole plugging device is provided. The borehole plugging device is applied to a plugging section of a borehole and includes a support assembly and blocking rods. The support assembly includes a base and a central shaft, the base being connected to the central shaft, and when the support assembly is located within the plugging section, the central axis of the central shaft is parallel to or coincides with the central axis of the plugging section. The blocking rods are disposed on the central shaft, and a plurality of the blocking rods are arranged along the axial direction of the central shaft, the projections of the plurality of blocking rods on the base forming an angle between each other, the angle being > 0°. When the support assembly is located within the plugging section, the base and the blocking rods enclose a blocking space within the plugging section.

[0007] Optionally, the barrier rod is inclinedly disposed on the central shaft, and the angle formed between the barrier rod and the central shaft is 30° to 60°.

[0008] Optionally, in a plane perpendicular to the axial direction of the central shaft, the included angle between the projections of adjacent barrier bars is 30° to 60°.

[0009] Optionally, the distance between the barrier rod adjacent to the base and the base is greater than the distance between adjacent barrier rods.

[0010] Optionally, the distance between the barrier rod adjacent to the base and the base is 30mm to 40mm, and the distance between adjacent barrier rods is 15mm to 30mm.

[0011] Optionally, the length of the central shaft is greater than the depth of the blocking section, and the central shaft has a communicating cavity opened along the axial direction, the communicating cavity communicating with the charging section of the borehole.

[0012] Optionally, the base is made of a flexible material, and the central shaft and the barrier rod are made of iron or steel.

[0013] According to a second aspect of this application, a method for using a borehole plugging device is provided. This method applies the borehole plugging device as described above, and the method is as follows: S1: Drill a hole according to the blasting design and load explosives into the charging section of the borehole to complete the loading; S2: Place the borehole plugging device into the plugging section of the borehole, with the base located at the bottom of the plugging section, and the central axis of the central shaft parallel to or coincident with the central axis of the plugging section; S3: Fill the blocking space with gravel to complete the borehole plugging.

[0014] Optionally, the gravel filling the obstruction space includes primary gravel, secondary gravel, and tertiary gravel, with primary gravel accounting for 20% of the mass, secondary gravel accounting for 60% of the mass, and tertiary gravel accounting for 20% of the mass.

[0015] Optionally, the primary crushed stone has a particle size of 15-20 mm, the secondary crushed stone has a particle size of 10-15 mm, and the tertiary crushed stone has a particle size of 5-10 mm.

[0016] When using the borehole plugging device provided in this application, a support assembly with multiple baffles is placed into the plugging section of the borehole. The base and the multiple baffles arranged along the axial direction of the central shaft form a blocking space within the plugging section. Plugging material is then placed into the blocking space. Under the constraint of the baffles arranged in a staggered pattern and the borehole wall, the movement of the plugging material is mutually hindered, forming an interlock. Furthermore, the cooperation between the plugging material and the baffles restricts the axial movement of the support assembly, increasing the tendency of the plugging material to deform laterally. This increases the compressive and frictional forces between the borehole plugging device and the borehole wall, effectively delaying the ejection of detonation products from the borehole, extending the rock-breaking time of the detonation products, and effectively improving the rock mass fracturing effect.

[0017] Therefore, the borehole plugging device provided in this application has a simple structure, low preparation or procurement cost, and convenient operation. It can effectively improve construction efficiency. The plugging material can be common crushed stone found on the construction site, which is convenient to obtain locally and effectively reduces construction costs. By extending the rock breaking time of the detonation products through this borehole plugging device, the quality of the plugging can be improved, the blasting effect can be effectively improved, and the construction safety can also be improved.

[0018] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0020] Figure 1 This is a schematic diagram of the borehole plugging device in the embodiments of this application;

[0021] Figure 2 This is a top view schematic diagram of the borehole plugging device in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram showing the completion of the loading of explosives in S1;

[0023] Figure 4 This is a schematic diagram of the borehole plugging device being inserted into the plugging section in S2;

[0024] Figure 5 This is a schematic diagram of completing the borehole plugging in S3.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-Supporting component; 11-Base; 12-Central shaft; 121-Communicating cavity;

[0027] 2-Barrier rod; 21-Blocking space; 22-First barrier rod;

[0028] 3-Blocked section;

[0029] 4-Packing section. Detailed Implementation

[0030] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0031] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0033] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0035] According to one embodiment of this application, a borehole plugging device is provided, applied to a plugging section 3 of a borehole. The borehole plugging device includes a support assembly 1 and a blocking rod 2. The support assembly 1 includes a base 11 and a central shaft 12. The base 11 is connected to the central shaft 12, and when the support assembly 1 is located within the plugging section 3, the central axis of the central shaft 12 is parallel to or coincides with the central axis of the plugging section 3. The blocking rod 2 is disposed on the central shaft 12, and a plurality of the blocking rods 2 are arranged along the axial direction of the central shaft 12. The projections of the plurality of blocking rods 2 on the base 11 form an angle between each other, and the angle is greater than 0°. Wherein, when the support assembly 1 is located within the plugging section 3, the base 11 and the blocking rods 2 enclose the blocking space 21 within the plugging section 3.

[0036] like Figures 1 to 2 As shown, the blast hole is cylindrical, with the bottom of the blast hole being the charging section 4 and the end near the opening being the plugging section 3. By filling the blast hole plugging section 3 with the blast hole plugging device, the explosive in the charging section 4 can be fully utilized in the blast hole, effectively improving construction efficiency.

[0037] The support component 1 of the borehole plugging device includes a base 11 and a central shaft 12. The base 11 is plate-shaped or disc-shaped, and its diameter is adapted to the diameter of the borehole. The thickness of the base 11 is 10mm to 20mm. By setting the base 11 to a size adapted to the borehole, when the support component 1 is embedded in the borehole, it can not only support the plugging material in the plugging section 3, but also increase the resistance of the support component 1 moving along the axial direction of the borehole by the accumulation of the plugging material on the base 11. This reduces the impact force on the support component 1 when it is impacted by the explosive detonation and delays the time of the detonation products in the borehole.

[0038] The central shaft 12 is cylindrical, and its diameter is smaller than that of the base 11. One end of the central shaft 12 can be detachably connected to the base 11 by means of threaded connection, interference fit, or integral molding.

[0039] The central shaft 12 and the base 11 can be connected vertically or at an angle to accommodate boreholes with different inclinations on the bottom surface, thereby increasing the contact area between the base 11 and the plugging material and strengthening the resistance to the axial movement of the support assembly 1 through the plugging material.

[0040] For example, the blast hole is columnar, the bottom of the blast hole blocking section 3 is perpendicular to the central axis of the blast hole, the central shaft 12 is perpendicularly connected to the base 11, the base 11 is in contact with the bottom of the blast hole blocking section 3, and the central axis of the central shaft 12 is parallel to or coincides with the central axis of the blast hole blocking section 3.

[0041] For example, the blast hole is columnar, the bottom of the blast hole blocking section 3 is inclined, the central shaft 12 is inclinedly connected to the base 11, the base 11 is in contact with the bottom of the blast hole blocking section 3, and the central axis of the central shaft 12 is parallel or coincident with the central axis of the blast hole blocking section 3.

[0042] like Figures 1 to 2 As shown, the blocking rod 2 is columnar, with its middle section connected to the central shaft 12. Multiple blocking rods 2 are arranged along the axial direction of the central shaft 12. That is, when the borehole blocking device is installed within the blocking section 3 of the borehole, multiple blocking rods 2 are arranged along the axial direction of the borehole. The projection of the multiple blocking rods 2 onto the base 11 forms an angle greater than 0°, causing the base 11 and the blocking rods 2 to enclose and form a blocking space 21 within the borehole blocking section 3.

[0043] The borehole plugging device is placed in the plugging section 3 and the blocking space 21 is filled with plugging material. When the explosive in the charge section 4 detonates, the blocking rod 2 can block the plugging material filled in the borehole plugging section 3, delaying the detonation products from rushing out of the borehole, effectively extending the rock-breaking time of the detonation products and improving the rock fragmentation effect.

[0044] The blocking material can be common gravel found on the construction site, which is easy to obtain locally and has a low construction cost.

[0045] When using the borehole plugging device provided in this application, the support assembly 1 with multiple baffle rods 2 is placed into the plugging section 3 of the borehole. The base 11 and the multiple baffle rods 2 arranged along the axial direction of the central shaft 12 form a blocking space 21 in the plugging section 3. The plugging material is put into the blocking space 21. Under the constraint of the baffle rods 2 and the borehole wall, the movement of the plugging material is mutually hindered, forming an interlock. The cooperation between the plugging material and the baffle rods 2 restricts the axial movement of the support assembly 1 and increases the tendency of the plugging material to deform laterally. This increases the squeezing force and friction between the borehole plugging device and the borehole wall, effectively delaying the detonation products from rushing out of the borehole, prolonging the rock-breaking time of the detonation products, and effectively improving the rock mass breaking effect.

[0046] Therefore, the borehole plugging device provided in this application has a simple structure, low preparation or procurement cost, and convenient operation. It can effectively improve construction efficiency. The plugging material can be common crushed stone found on the construction site, which is convenient to obtain locally and effectively reduces construction costs. By extending the rock breaking time of the detonation products through this borehole plugging device, the quality of the plugging can be improved, the blasting effect can be effectively improved, and the construction safety can also be improved.

[0047] In one example, the barrier rod 2 is inclinedly disposed on the central shaft 12, and the angle formed between the barrier rod 2 and the central shaft 12 is 30° to 60°.

[0048] like Figures 1 to 2 As shown, multiple baffle rods 2 are evenly distributed along the axial direction of the central shaft 12, and each baffle rod 2 is inclined on the central shaft 12. The angle formed between the baffle rod 2 and the central shaft 12 is 30° to 60°, preferably 30°. By inclinedly arranging the multiple baffle rods 2, a shield is formed in the blocking space 21 from the base 11 towards the borehole opening. This not only effectively delays the detonation products from exiting the borehole, prolongs the rock-breaking time of the detonation products, and improves the rock fragmentation effect, but also reduces the impact force of the detonation products when they exit the borehole, improves the safety of the detonation products, and effectively reduces the dust of the detonation products, thus reducing the impact on the construction environment.

[0049] The barrier rod 2 is columnar. For example, if the borehole diameter is 100mm, the length of the barrier rod 2 is 104mm. The diameter of the barrier rod 2 is 5mm to 15mm. The barrier rod 2 is inclinedly set on the central shaft 12. The length of the barrier rod 2 when projected onto a plane perpendicular to the central shaft 12 is less than the borehole diameter by 10mm to 30mm.

[0050] In one example, in a plane perpendicular to the axial direction of the central shaft 12, the included angle between the projections of adjacent barrier rods 2 is 30° to 60°.

[0051] like Figures 1 to 2 As shown, the central shaft 12 is vertically connected to the base 11, and multiple barrier rods 2 are arranged along the axial direction of the central shaft 12. The included angle formed by the projections of adjacent barrier rods onto the base 11 is 30° to 60°, preferably 45°.

[0052] By intersecting the projections of multiple baffles 2 onto the base 11, the plugging material is blocked when it rushes out of the borehole along the inner wall of the borehole. Under the constraint of the intersecting baffles 2 and the borehole wall, the movement of the plugging material is mutually hindered, forming an interlock. The axial movement of the borehole plugging device is restricted, which increases the tendency of the plugging material to deform laterally. This increases the squeezing and frictional forces between the borehole plugging device and the borehole wall, effectively delaying the detonation products from rushing out of the borehole and prolonging the rock-breaking time of the detonation products, which can significantly improve the rock mass breaking effect.

[0053] In one example, the distance between the barrier rod 2 adjacent to the base 11 and the base 11 is greater than the distance between adjacent barrier rods 2.

[0054] like Figures 1 to 2 As shown, the bottom of the central shaft 12 is connected to the base 11. Multiple baffle rods 2 are evenly distributed along the axial direction on the central shaft 12. The baffle rod 2 located at the bottom of the central shaft 12 and close to the base 11 is the first baffle rod 22. The distance between the first baffle rod 22 and the base 11 is greater than the distance between adjacent baffle rods 2. By increasing the distance between the first baffle rod 22 and the base 11, more blocking material is filled below the first baffle rod 22. This not only improves the blocking effect of the first baffle rod 22 but also allows the blocking material below the first baffle rod 22 to fully compress the base 12, increasing the resistance of the support assembly 1 as it punches through the blast hole.

[0055] In one example, the distance between the barrier rod 2 adjacent to the base 11 and the base 11 is 30mm to 40mm, and the distance between adjacent barrier rods 2 is 15mm to 30mm.

[0056] like Figures 1 to 2 As shown, the barrier rod 2 adjacent to the base 11 is the first barrier rod 22. The distance between the first barrier rod 22 and the base 11 is greater than the distance between adjacent barrier rods 2. For example, the distance between the first barrier rods 22 is 30mm to 40mm, while the distance between adjacent barrier rods 2 is 15mm to 30mm. By reducing the distance between adjacent barrier rods 2, multiple barrier rods 2 can effectively block the blocking material within a limited space, thereby delaying the detonation products from exiting the blast hole, extending the rock-breaking time of the detonation products, and improving the rock mass fracturing effect.

[0057] In one example, the length of the central shaft 12 is greater than the depth of the blocking section 3, and the central shaft 12 has a communicating cavity 121 opened in the axial direction, the communicating cavity 121 communicating with the charging section 4 of the borehole.

[0058] like Figures 1 to 2 As shown, the length of the central shaft 12 is greater than the depth of the blocking section 3. The central shaft 12 is tubular, with its top extending out of the blast hole and its bottom communicating with the charging section 4. The communicating cavity 121 of the central shaft 12 facilitates the ignition of the explosive in the charging section 4.

[0059] For example, the borehole diameter is 100mm, the depth is 8m, the plugging section 3 is 2.5m long, the length of the central shaft 12 is 20-30mm longer than the depth of the plugging section 3, the outer diameter of the central shaft 12 is 10-20mm, preferably 20mm, and the thickness is 1-2mm, preferably 1mm. The base 11 has a diameter of 100mm and a central hole diameter of 20mm. The central shaft 12 is connected to the central hole on the base 11, and the connecting cavity 121 is connected to the charging section 4 through the central hole.

[0060] The central shaft 12 and the base 11 can be connected by means of interference fit, threaded connection, or integral molding.

[0061] In one example, the base 11 is made of a flexible material, and the central shaft 12 and the barrier rod 2 are made of iron or steel.

[0062] In this embodiment, the base 11 can be made of rubber, plastic, or silicone. By using a flexible material to manufacture the base 11, when the supporting component 1 is placed on the blocking section 3 of the borehole, the base 11 can fit more closely to the shape of the bottom of the blocking section 3, increasing the contact area between the blocking material and the bottom of the blocking section 3, and increasing the friction between the side wall of the base 11 and the side wall of the borehole, thereby reducing the impact force of the borehole blocking device being ejected from the borehole.

[0063] By using flexible materials to manufacture the base 11, issues such as jamming can be effectively reduced, thus significantly lowering the difficulty of construction.

[0064] Of course, the base 11 in this embodiment is not limited to the material described above, and those skilled in the art can make it according to actual needs. For example, the base 11 can also be made of a rigid material.

[0065] The central shaft 12 and the barrier rod 2 are made of metal, preferably iron or steel. By using rigid materials to manufacture the central shaft 12 and the barrier rod 2, not only can the load-bearing capacity of the central shaft 12 and the barrier rod 2 be effectively improved, but the impact resistance of the barrier rod 2 can also be effectively strengthened, thus achieving effective blocking of the blocking material.

[0066] According to another embodiment of this application, a method for using a borehole plugging device is provided. This method applies the borehole plugging device as described above, and the method is as follows: S1. Drill a hole according to the blasting design and load explosives into the loading section 4 of the borehole to complete the loading; S2. Place the borehole plugging device into the plugging section 3 of the borehole, with the base 11 located at the bottom of the plugging section 3, and the central axis of the central shaft 12 parallel to or coincident with the central axis of the plugging section 3; S3. Fill the blocking space 21 with gravel to complete the borehole plugging.

[0067] like Figures 3 to 5As shown, the first step is to drill blast holes according to the blasting design. The bottom of the blast hole is the charging section 4, and the section from the charging section 4 to the opening of the blast hole is the plugging section 3. Explosives are then filled into the charging section 4 to complete the charging process.

[0068] The second step involves placing the borehole plugging device of this application into the plugging section 3. The base 11 is made of rubber and is fitted to the bottom of the plugging section 3, with the sidewall of the base 11 also fitting against the sidewall of the plugging section 3, increasing the friction between the bearing component and the inner wall of the borehole. The central shaft 12 is embedded in the borehole, with one end of the central shaft 12 extending out of the borehole plugging section 3 away from the base 11, so that the explosive in the charge section 4 can be ignited through the connecting cavity 121 of the central shaft 12. The central axis of the central shaft 12 coincides with the central axis of the borehole, allowing multiple blocking components to be staggered around the central axis of the borehole, effectively blocking the plugging material.

[0069] For example, the borehole diameter is 100mm, the depth is 8m, the charging section 4 is 5.5m long, and the plugging section 3 is 2.5m long. In this application, the length of the central shaft 12 is 20-30mm longer than the depth of the plugging section 3, the outer diameter of the central shaft 12 is 20mm, and the thickness is 1mm. The base 11 has a diameter of 100mm and a central hole diameter of 20mm. The central shaft 12 is connected to the central hole on the base 11, and the connecting cavity 121 communicates with the charging section 4 through the central hole.

[0070] The third step involves the borehole plugging device forming a blocking space 21 within the plugging section 3. Blocking material is then filled into the blocking space 21. This blocking material can be common gravel found on the construction site, making it easy to source locally and reducing construction costs. Filling with gravel completes the borehole plugging process.

[0071] In this embodiment, under the constraint of the staggered baffles 2 and the borehole wall, the movement of the crushed stone particles hinders each other, forming an interlock. The axial movement of the borehole plugging device is restricted, and the tendency of the crushed stone particles to deform laterally increases. This increases the compressive and frictional forces between the borehole plugging device and the borehole wall, effectively delaying the ejection of detonation products from the borehole and prolonging the rock-breaking time of the detonation products, thus significantly improving the rock mass fracturing effect. Moreover, compared with the traditional borehole cuttings plugging method, this application only adds one step: placing the borehole plugging device. This step requires very little time, is convenient to operate, and has high construction efficiency.

[0072] In one example, the gravel filling the obstruction space 21 includes primary gravel, secondary gravel, and tertiary gravel, with primary gravel accounting for 20% of the mass, secondary gravel accounting for 60% of the mass, and tertiary gravel accounting for 20% of the mass.

[0073] In this embodiment, the blocking material filling the blocking space 21 includes primary crushed stone, secondary crushed stone and tertiary crushed stone. By selecting different grades of crushed stone for filling, the crushed stones can also play a blocking effect, further prolonging the rock breaking time of the detonation products and improving the rock mass breaking effect.

[0074] Of course, the proportion of crushed stone in the embodiments of this application is not limited to the above proportion, and those skilled in the art can set it according to actual needs.

[0075] In one example, the primary crushed stone has a particle size of 15-20 mm, the secondary crushed stone has a particle size of 10-15 mm, and the tertiary crushed stone has a particle size of 5-10 mm.

[0076] In this embodiment, crushed stones of different sizes are selected to fill the obstruction space 21, so that the crushed stones of different sizes can block each other, further prolonging the rock-breaking time of the detonation products and improving the rock mass crushing effect.

[0077] Of course, the crushed stone in this embodiment is not limited to the above-mentioned particle size, and those skilled in the art can set it according to actual needs.

[0078] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A borehole plugging device, applied to the plugging section (3) of a borehole, characterized in that, include: The support assembly (1) includes a base (11) and a central shaft (12), the base (11) being connected to the central shaft (12), and when the support assembly (1) is located within the blockage section (3), the central axis of the central shaft (12) is parallel to or coincides with the central axis of the blockage section (3); A barrier rod (2) is disposed on the central shaft (12), and a plurality of the barrier rods (2) are arranged along the axial direction of the central shaft (12). The projections of the plurality of barrier rods (2) on the base (11) form an angle between each other, and the angle is greater than 0°. When the supporting component (1) is located in the blocking section (3), the base (11) and the barrier rod (2) enclose the blocking section (3) to form a blocking space (21). Blocking material is placed into the blocking space. Under the constraint of the barrier rods and the borehole wall, which are distributed in a staggered manner in the space, the movement of the blocking material is mutually hindered, forming an interlock.

2. The borehole plugging device according to claim 1, characterized in that, The barrier rod (2) is inclinedly disposed on the central shaft (12), and the angle formed between the barrier rod (2) and the central shaft (12) is 30° to 60°.

3. The borehole plugging device according to claim 1, characterized in that, In a plane perpendicular to the axial direction of the central shaft (12), the included angle between the projections of adjacent barrier rods (2) is 30° to 60°.

4. The borehole plugging device according to claim 1, characterized in that, The distance between the barrier rod (2) adjacent to the base (11) and the base (11) is greater than the distance between adjacent barrier rods (2).

5. The borehole plugging device according to claim 4, characterized in that, The distance between the barrier rod (2) adjacent to the base (11) and the base (11) is 30mm to 40mm, and the distance between adjacent barrier rods (2) is 15mm to 30mm.

6. The borehole plugging device according to claim 1, characterized in that, The length of the central shaft (12) is greater than the depth of the blocking section (3), and the central shaft (12) has a connecting cavity (121) opened in the axial direction, which is connected to the charging section (4) of the borehole.

7. The borehole plugging device according to claim 1, characterized in that, The base (11) is made of flexible material, and the central shaft (12) and the barrier rod (2) are made of iron or steel.

8. A method of using a borehole plugging device, characterized in that, The method of using the borehole plugging device as described in any one of claims 1-7 is as follows: S1: Drill holes according to the blasting design and load the explosives into the charging section (4) of the borehole to complete the charging; S2: The borehole plugging device is placed into the plugging section (3) of the borehole, the base (11) is located at the bottom of the plugging section (3), and the central axis of the central shaft (12) is parallel to or coincides with the central axis of the plugging section (3); S3: Fill the blocking space (21) with gravel to complete the blast hole blocking.

9. The method of using the borehole plugging device according to claim 8, characterized in that, The crushed stone filling the obstruction space (21) includes primary crushed stone, secondary crushed stone and tertiary crushed stone, with the primary crushed stone accounting for 20% of the mass, the secondary crushed stone accounting for 60% of the mass, and the tertiary crushed stone accounting for 20% of the mass.

10. The method of using the borehole plugging device according to claim 9, characterized in that, The primary crushed stone has a particle size of 15-20 mm, the secondary crushed stone has a particle size of 10-15 mm, and the tertiary crushed stone has a particle size of 5-10 mm.

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