Powerful hole plugging device

Abstract

The utility model discloses a powerful hole plugging device. The powerful hole plugging device comprises a sealing layer, a plugging object, a cylinder, a long rod and a hanging ring expansion screw. Wherein the sealing layer is in coupling contact with a blast hole and is used for preventing explosion gas from escaping; the friction force between the blocking object and the blast hole can be increased in the compaction process of the blocking object. The cylinder can transmit the axial pressure of the blocking object to the long rod. The long rod penetrates through the hanging ring in the hanging ring expansion screw; and the hanging ring expansion screw is fixed on the tunnel face of the tunnel. According to the powerful hole plugging device, the plugging effect can be greatly enhanced, so that the slotting effect of slotting holes is improved, and the overall blasting effect is improved. In addition, the powerful hole plugging device is easy and convenient to operate and controllable in cost in practical application, has high social and economic effects and can be used for underground blasting engineering such as tunnels and roadways.

Description

Technical Field

[0001] The utility model relates to the field of blasting engineering, in particular to a powerful hole blocking device. Background Art

[0002] Drilling and blasting is currently the primary method used for tunnel and roadway excavation due to its strong adaptability to geological conditions and low excavation costs. Unlike open-pit blasting, underground blasting only has a single free surface, necessitating the artificial creation of a new free surface through slotting. Wedge-shaped slotting is widely used due to its advantages, such as easy to ensure slotting results and ease of construction. However, for small-section tunnels, the spatial limitations of the slotting angle and depth severely impact blasting footage. Studies have shown that the separation of rock mass from the original rock in the slotting area is primarily related to the quasi-static expansion of the explosive gas. Due to the poor plugging effect of traditional hole-plugging technology, it cannot fully utilize the explosive gas, which may lead to slotting failure and thus affect the overall blasting effect. Therefore, the quality of the hole plugging becomes one of the key factors in ensuring the effectiveness of straight-eye slot blasting.

[0003] To improve the hole-blocking effect, Chinese Patent Application No. 202221093395.0 discloses an explosive hole-blocking device. This device uses a detonating cord or detonator to expand the hole-blocking device, thereby improving the blocking effect. However, with the gradual elimination of detonating cords and the widespread use of electronic detonators, the cost of explosive hole-blocking devices has increased significantly, severely limiting their widespread application. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a strong hole blocking device, which will limit the axial movement of the blocking object during use, so that the blocking object is in close contact with the wall of the blast hole, thereby increasing the friction between it and the wall of the blast hole, and further enhancing the blasting effect.

[0005] The technical solution of the utility model to solve the above technical problems is:

[0006] A powerful hole plugging device is characterized in that it includes a sealing layer, a plugging object, a cylinder, a long rod, and a lifting ring expansion screw; wherein the sealing layer is in coupling contact with the blast hole and is used to prevent the escape of explosive gas; the plugging object can increase the friction between it and the blast hole during the compaction process; the cylinder can transfer the axial pressure of the plugging object to the long rod; the long rod passes through the lifting ring in the lifting ring expansion screw; and the lifting ring expansion screw is fixed to the tunnel face.

[0007] In a preferred embodiment of the present invention, the sealing layer is made of a flexible material, and the diameter of the sealing layer is slightly smaller than the inner diameter of the blasthole, but it will deform and couple with the blasthole under the action of external forces, such as blasthole mud, gelled water, etc.

[0008] In a preferred embodiment of the present invention, the plugging material is a loose body, such as soil, sand, etc., which is placed in a plastic bag with a diameter slightly smaller than the blasthole, which is conducive to rapid plugging.

[0009] In a preferred embodiment of the present invention, the cylinder has a relatively large compressive strength and its diameter is slightly smaller than the inner diameter of the blasthole, such as wood, cement block, rubber, polyurethane elastomer, etc.

[0010] In a preferred embodiment of the present invention, the long rod has a large bending stiffness, and the bending stiffness of the long rod is not less than 1000 N·m 2 , the diameter of the long rod is smaller than the inner diameter of the lifting ring in the lifting ring expansion screw, such as steel pipe, steel bar, etc.

[0011] In a preferred embodiment of the present invention, the diameter of the screw in the lifting ring expansion screw is not less than 1 cm, the length is not less than 5 cm, and the inner diameter of the lifting ring is not less than 1.5 cm.

[0012] In a preferred embodiment of the present invention, the lifting ring expansion screw is located on the connecting line of the groove holes.

[0013] The working principle of the powerful hole blocking device of this utility model is:

[0014] The powerful hole plugging device of the utility model utilizes a sealing layer to completely seal the explosive gas in the blast hole, and transmits the pressure generated by the explosive gas to the plugging object; under the action of the expansion screw and the long rod, the axial movement of the plugging object is restricted, causing the plugging object to expand radially and come into close contact with the wall of the blast hole, thereby increasing the friction between the plugging object and the wall of the blast hole, thereby greatly improving the hole plugging quality and improving the blasting effect.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The powerful hole-blocking device provided by the utility model can limit the axial movement of the blockage, so that the blockage is in close contact with the wall of the blasthole, thereby increasing the friction between the blockage and the wall of the blasthole, thereby enhancing the blasting effect.

[0017] 2. The powerful hole plugging device provided by the utility model has the advantages of simple operation and good hole plugging effect. It can give full play to the rock-breaking effect of the explosive gas, effectively enhance the throwing effect, greatly improve the grooving effect, thereby increasing the blasting cycle footage and further improving the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the blasthole positions on the tunnel face of the present invention.

[0019] Figure 2 This is a schematic diagram of the powerful hole blocking device of the utility model.

[0020] Among them, 1-sealed layer, 2-blocking object, 3-cylinder, 4-long rod, 5-lifting ring expansion screw, 6-detonating equipment, 7-explosive roll, 8-gun hole. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0022] Example 1

[0023] See also Figure 1 and Figure 2 The utility model is a strong hole plugging device, comprising a sealing layer 1, a plug 2, a cylinder 3, a long rod 4, and a lifting ring expansion screw 5; wherein, the sealing layer 1 is coupled and in contact with the blast hole 8, and is used to prevent the escape of explosive gas; the plug 2 can increase the friction between it and the blast hole 8 during the compaction process; the cylinder 3 can transfer the axial pressure of the plug 2 to the long rod 4; the long rod 4 passes through the lifting ring in the lifting ring expansion screw 5; the lifting ring expansion screw 5 is fixed on the tunnel face.

[0024] See also Figure 1 and Figure 2 The inner diameter of the blast hole 8 is 40 mm; the explosive roll 7 is an emulsion explosive with a diameter of 32 mm and a length of 30 cm; the detonating device 6 is a No. 8 detonator.

[0025] See also Figure 1 and Figure 2 The sealing layer 1 is made of taphole mud, which has a diameter of 32 mm, slightly smaller than the inner diameter of the blasthole 8. It can be deformed under external force. Therefore, the sealing layer 1 needs to be compacted by a taphole stick and coupled with the blasthole 8.

[0026] See also Figure 1 and Figure 2 The blockage 2 is sand, which is packed in a plastic bag with a diameter of 32 mm, which is conducive to rapid blocking.

[0027] See also Figure 1 and Figure 2 The cylinder 3 is made of wood, has a diameter of 32 mm, and has a large compressive strength.

[0028] See also Figure 1 and Figure 2 The long rod 4 is a steel bar with a diameter of 20 mm, which is smaller than the inner diameter of the ring in the ring expansion screw 5 and has a large bending stiffness.

[0029] See also Figure 1 and Figure 2 The diameter of the screw in the lifting ring expansion screw 5 is 12 mm, the length is 8 cm, and the inner diameter of the lifting ring is 25 mm.

[0030] See also Figure 1 and Figure 2 The lifting ring expansion screw 5 is located on the connecting line of the groove holes.

[0031] See also Figure 1 and Figure 2 The working principle of the powerful hole plugging device of the utility model is further described below with reference to the accompanying drawings:

[0032] The powerful hole plugging device of the present invention utilizes a sealing layer 1 to completely seal the explosive gas in the blast hole 8, and transmits the pressure generated by the explosive gas to the plug 2; under the action of the expansion screw 5 and the long rod 4, the axial movement of the plug 2 is restricted, causing the plug 2 to expand radially and come into close contact with the wall of the blast hole 8, thereby increasing the friction between it and the wall of the blast hole 8, thereby greatly improving the hole plugging quality and improving the blasting effect.

[0033] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A powerful hole plugging device, characterized in that: It includes a sealing layer, a plugging object, a cylinder, a long rod, and a lifting ring expansion screw; wherein, the sealing layer is coupled with the blast hole to prevent the escape of explosive gas; the plugging object can increase the friction between it and the blast hole during the compaction process; the cylinder can transfer the axial pressure of the plugging object to the long rod; the long rod passes through the lifting ring in the lifting ring expansion screw; the lifting ring expansion screw is fixed on the tunnel face.

2. The strong hole plugging device according to claim 1, characterized in that: The sealing layer is made of a flexible material, the diameter of which is smaller than the inner diameter of the blast hole, and can be deformed and coupled with the blast hole under the action of an external force.

3. The strong hole plugging device according to claim 1, characterized in that: The plugging object is a loose body, which is placed in a plastic bag with a diameter smaller than the blast hole, which is conducive to rapid plugging.

4. The strong hole plugging device according to claim 1, characterized in that: The cylinder has greater compressive strength and its diameter is smaller than the inner diameter of the blasthole.

5. The strong hole plugging device according to claim 1, characterized in that: The bending stiffness of the long rod is not less than 1000N·m 2 The diameter of the long rod is smaller than the inner diameter of the lifting ring in the lifting ring expansion screw.

6. The strong hole plugging device according to claim 1, characterized in that: The diameter of the screw in the lifting ring expansion screw is not less than 1 cm, the length is not less than 5 cm, and the inner diameter of the lifting ring is not less than 1.5 cm.

7. The strong hole plugging device according to claim 1, characterized in that: The lifting ring expansion screw is located on the connecting line of the groove holes.

Images