Powerful hole plugging device and using method thereof

Abstract

The invention discloses a powerful hole plugging device and a construction method thereof. 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 invention relates to the field of blasting engineering, and in particular to a strong hole plugging device and a use method thereof. Background Art

[0002] The drilling and blasting method is currently mainly used for tunneling and tunneling due to its strong adaptability to geological conditions and low excavation cost. Underground blasting is different from open-pit blasting. It has only one free surface, so a new free surface must be artificially created by cutting. Among them, wedge-shaped cutting is widely used because of its advantages such as easy cutting effect and easy construction. However, for tunnels with small cross-sections, the blasting footage is seriously affected because of its space limitations on the cutting angle and depth. Studies have shown that the separation of rock mass from the original rock in the cutting area is mainly related to the quasi-static expansion of the explosive gas. Since the traditional plugging technology has a poor plugging effect, it cannot give full play to the role of the explosive gas, which may lead to the failure of cutting, thus affecting the overall blasting effect. Therefore, the quality of plugging becomes one of the main factors to ensure the blasting effect of straight-eye cutting.

[0003] In order to improve the plugging effect, Chinese patent application No. 202221093395.0 discloses an explosive plugging device, which requires the use of detonating cords or detonators to expand the plugging device, thereby improving the plugging effect. However, with the gradual elimination of detonating cords and the promotion and application of electronic detonators, the cost of explosive plugging devices has increased significantly, seriously limiting their promotion and application. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a strong hole plugging device, which can limit the axial movement of the plug during use, so that the plug is in close contact with the wall of the blast hole, thereby increasing the friction between the plug and the wall of the blast hole, and further enhancing the blasting effect.

[0005] Another object of the present invention is to provide a method for using a strong hole plugging device.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A strong 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 in coupling contact 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.

[0008] 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.

[0009] In a preferred embodiment of the present invention, the plugging material is a loose body, which is packed in a plastic bag with a diameter slightly smaller than the blast hole, so as to facilitate rapid plugging, such as soil, sand, etc.

[0010] In a preferred embodiment of the present invention, the cylinder has a 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.

[0011] In a preferred embodiment of the present invention, the long rod has a relatively large bending stiffness, and the bending stiffness 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.

[0012] According to 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.

[0013] In a preferred embodiment of the present invention, the eye expansion screw is located on the connecting line of the cutout holes.

[0014] A method for using a strong hole plugging device comprises the following steps:

[0015] 1) Drill holes at the position where the groove holes are connected, and then install the eye expansion screws;

[0016] 2) Load the explosive roll into the cutout hole and lead the detonating wire to the hole mouth;

[0017] 3) Loading the explosive cartridge into the cutout hole;

[0018] 4) Send the sealed layer into the cut hole, compact the sealed layer with a blasting stick to ensure coupling contact between the sealed layer and the blasting hole;

[0019] 5) Place the plug into the cut hole, with a length of about 30 times the diameter of the blast hole;

[0020] 6) Install the cylinder into the slotted hole and ensure that the end face of the cylinder is flush with the hole opening;

[0021] 7) Pass the long rod through the lifting ring in the expansion screw and press it against the cylinder in the slotted hole;

[0022] 8) Connect the detonating wire of the explosive coil to the main line of the detonating network.

[0023] The working principle of the powerful hole plugging device of the present invention is:

[0024] The high-power hole plugging device of the present invention 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, so that the plugging object expands radially and contacts closely 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.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The strong hole plugging device provided by the present invention can limit the axial movement of the plugging object, so that the plugging 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, thereby enhancing the blasting effect.

[0027] 2. The powerful hole plugging device provided by the present invention 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 and effectively enhance the throwing effect, greatly improving the grooving effect, thereby increasing the blasting cycle footage and further improving the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the blasthole positions on the tunnel face of the present invention.

[0029] Figure 2 It is a schematic diagram of the strong hole plugging device of the present invention.

[0030] 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

[0031] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0032] Embodiment 1

[0033] See also Figure 1 and Figure 2 A strong hole plugging device of the present invention is characterized in that it includes a sealing layer 1, a plugging object 2, a cylinder 3, a long rod 4, and a lifting ring expansion screw 5; wherein the sealing layer 1 is coupled and contacted with the blast hole 8 to prevent the escape of the explosive gas; the plugging object 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 plugging object 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.

[0034] See also Figure 1 and Figure 2The 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.

[0035] See also Figure 1 and Figure 2 The sealing layer 1 is cannon clay, and its diameter is 32 mm, which is slightly smaller than the inner diameter of the blast hole 8, and can be deformed under the action of external force. Therefore, the sealing layer 1 needs to be compacted by a cannon stick and coupled with the blast hole 8.

[0036] See also Figure 1 and Figure 2 The plugging material 2 is sand, which is packed in a plastic bag with a diameter of 32 mm, which is conducive to rapid plugging.

[0037] 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.

[0038] 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 lifting ring in the lifting ring expansion screw 5 and has a large bending rigidity.

[0039] See also Figure 1 and Figure 2 The screw diameter of 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.

[0040] See also Figure 1 and Figure 2 The lifting eye expansion screw 5 is located on the connecting line of the groove holes.

[0041] Embodiment 2

[0042] See also Figure 1 and Figure 2 A method for using a strong hole plugging device in this embodiment includes the following steps:

[0043] 1) Drill holes AA at the position of the connecting line of the cutout holes 8, and then install the eye expansion screws 5;

[0044] 2) Load the explosive roll into the cutout hole 8 and lead the detonating wire out to the hole mouth;

[0045] 3) Loading the explosive cartridge 7 into the cutout hole 8;

[0046] 4) The sealed layer 1 is sent into the cutout hole 8, and the sealed layer 1 is compacted by a blasting stick to ensure that the sealed layer 1 is close to the blasting hole.

[0047] 8 coupling contact;

[0048] 5) Insert the plug 2 into the cut hole 8, the length of which is about 30 times the diameter of the blast hole 8;

[0049] 6) Install the cylinder 3 into the cutout hole 8, and ensure that the end surface of the cylinder 3 is flush with the hole opening;

[0050] 7) Pass the long rod 4 through the lifting ring in the expansion screw 5 and make it press the cylinder 3 in the groove hole 8;

[0051] 8) Connect the detonating wire of the explosive coil to the main line of the detonating network.

[0052] See also Figure 1 and Figure 2 The detonating charge is No. 2 rock emulsion explosive with electronic digital detonator.

[0053] See also Figure 1 and Figure 2 The inner diameter of the blast hole 8 is 40 mm.

[0054] See also Figure 1 and Figure 2 The explosive cartridge 7 is No. 2 rock emulsion explosive, the diameter of the cartridge is 32 mm, and the detonation velocity is not less than 3200 m / s.

[0055] See also Figure 1 and Figure 2 The sealing layer 1 is gelled water, which is packed in a plastic bag with a diameter of 32 mm, and then compacted by a blasting stick and coupled with the blasting hole 8.

[0056] See also Figure 1 and Figure 2 The plugging material 2 is soil, which is packed in a plastic bag with a diameter of 32 mm, which is conducive to rapid plugging.

[0057] See also Figure 1 and Figure 2 The cylinder 3 is a concrete column with a diameter of 32 mm and a length of 10 cm, and has a large compressive strength.

[0058] See also Figure 1 and Figure 2 The long rod 4 is a steel bar with a diameter of 15 mm, which is smaller than the inner diameter of the lifting ring in the lifting ring expansion screw 5 and has a large bending rigidity.

[0059] See also Figure 1 and Figure 2 The diameter of the screw in the lifting ring expansion screw 5 is 1 cm, the length is 7 cm, and the inner diameter of the lifting ring is 20 mm.

[0060] See also Figure 1 and Figure 2The working principle of the strong hole plugging device of the present invention is further described below in conjunction with the accompanying drawings:

[0061] The powerful hole plugging device of the present invention utilizes the sealing layer 1 to completely seal the explosion gas in the blast hole 8, and transmits the pressure generated by the explosion gas to the plugging object 2; under the action of the expansion screw 5 and the long rod 4, the axial movement of the plugging object 2 is restricted, so that the plugging object 2 expands radially and contacts closely with the wall of the blast hole 8, thereby increasing the friction between the plugging object 2 and the wall of the blast hole 8, thereby greatly improving the hole plugging quality and improving the blasting effect.

[0062] 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 equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A strong 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 in coupling contact with the blast hole to prevent the explosion gas from escaping; 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 it will deform under the action of an external force and come into coupling contact with the blast hole.

3. The strong hole plugging device according to claim 1, characterized in that: The plugging object is a loose body, which is packed 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 blast hole.

5. The strong hole plugging device according to claim 1, characterized in that: 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.

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

8. A method for using the strong hole plugging device according to claim 1, characterized in that: The following steps are involved: 1) Drill holes at the position where the groove holes are connected, and then install the eye expansion screws; 2) Load the explosive roll into the cutout hole and lead the detonating wire to the hole mouth; 3) Loading the explosive cartridge into the cutout hole; 4) Send the sealed layer into the slot hole and compact it with a blasting stick to ensure that the sealed layer is coupled with the blasting hole. touch; 5) Place the plug into the cut hole, the length of which is 30 times the diameter of the blast hole; 6) Install the cylinder into the slotted hole and ensure that the end face of the cylinder is flush with the hole opening; 7) Pass the long rod through the lifting ring in the expansion screw and press it against the cylinder in the slotted hole; 8) Connect the detonating wire of the explosive coil to the main line of the detonating network.

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