Directional isolation buffering gun barrel

Abstract

The utility model discloses a directional isolation buffering gun barrel which comprises a semicircular outer barrel and a semicircular inner barrel which are coaxially arranged, the radial side of the semicircular outer barrel is connected with the radial side of the semicircular inner barrel through a radial end plate, and the axial side of the semicircular outer barrel is connected with the axial side of the semicircular inner barrel through an axial end plate. Space used for being filled with energy dissipation materials is formed among the semicircular outer cylinder, the semicircular inner cylinder, the radial end plate and the axial end plate, and the inner side of the semicircular inner cylinder is used for containing cartridges. The utility model has the advantages that: the energy dissipation material absorbs explosive waves and prevents the explosive waves from spreading into the rock mass, and the explosive waves on the other side directly spread into the rock mass to cause fracture of the rock mass, so that directional spreading and directional isolation of the explosive waves can be realized, the rock mass needing to be blasted is broken, and the rock mass not needing to be blasted is kept complete, thereby not only solving the problem of over-excavation and under-excavation of the tunnel, but also reducing the construction cost. Disturbance to surrounding rocks can be reduced; the directional isolation buffering gun barrel can be repeatedly used, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel excavation by drilling and blasting method, in particular to a directional isolation buffer cartridge. Background Technique

[0002] Blasting technology is an engineering technology that uses the energy of explosive explosion to destroy the original structure of a certain object and realizes different engineering purposes by means of charge arrangement and initiation method. Since blasting technology can save a large amount of manpower and material resources, it has been widely used in tunnel excavation at present. However, there are the following problems: (1) The irregularity of the damage to the surrounding rock by traditional blasting often causes accidents such as over-excavation, under-excavation, and even collapse during the tunnel excavation process. The problem of tunnel over-excavation is serious, usually reaching more than 30 cm. The later support is difficult, and the thickness of the secondary lining needs to be increased, increasing the construction period and material cost; (2) The explosive quantity and drilling and blasting design parameters in the tunnel excavation by drilling and blasting method are unreasonable, and the smooth blasting effect cannot be achieved; (3) When excavating a tunnel, it is necessary to maintain the good stability of the surrounding rock, while the traditional blasting technology is difficult to control the blasting intensity, and the degree of damage and disturbance to the rock mass is large, which is not conducive to the subsequent stable support of the tunnel; (4) The over-excavation and under-excavation of the tunnel are related to the arrangement of the peripheral holes on the heading face and the propagation of the explosion wave. The traditional method of placing cartridges cannot achieve directional blasting of the rock mass on the heading face, which will also cause over-excavation of the tunnel and the failure to achieve the smooth blasting effect. Summary of the Invention

[0003] The purpose of the utility model is to provide a directional isolation buffer cartridge according to the deficiencies of the above-mentioned prior art. One side of the directional isolation buffer cartridge is a hollow semi-cylinder filled with energy-absorbing material, and the other side is provided with hoop rings arranged opposite to each other before and after for fixing cartridges. The directional isolation buffer cartridge filled with cartridges is placed into the peripheral holes of the rock mass on the heading face and sealed with a sealing material. When the cartridge is detonated, the explosion wave propagates circumferentially, and the energy-absorbing material absorbs the explosion wave to prevent it from propagating into the rock mass. The explosion wave on the other side directly propagates into the rock mass, causing the rock mass to rupture, realizing the directional propagation and directional isolation of the explosion wave, making the rock mass that needs to be blasted broken and the rock mass that does not need to be blasted remain intact, not only reducing the disturbance to the surrounding rock, but also solving the problem of tunnel over-excavation and under-excavation.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A directional isolation buffer cartridge, the directional isolation buffer cartridge includes a semi-circular outer cylinder and a semi-circular inner cylinder arranged coaxially. The radial side between the semi-circular outer cylinder and the semi-circular inner cylinder is connected by a radial end plate, and the axial side between the semi-circular outer cylinder and the semi-circular inner cylinder is connected by an axial end plate. A space for filling energy-absorbing material is formed between the semi-circular outer cylinder, the semi-circular inner cylinder, the radial end plate and the axial end plate, and the inner side of the semi-circular inner cylinder is used for placing cartridges.

[0006] Both ends of the semi-circular inner cylinder are provided with hoop for fixing the cartridge.

[0007] A cartridge placement cylinder is formed between the semi-circular inner cylinder and the hoop, and the size and shape of the cartridge placement hole of the cartridge placement cylinder respectively correspond to the size and shape of the cartridge.

[0008] The directional isolation buffer blast tube filled with the cartridge is placed in the peripheral blast hole of the tunnel face rock mass, and the peripheral blast hole is blocked with a blocking material.

[0009] The advantages of the utility model are as follows:

[0010] (1) The energy dissipation material absorbs the blast wave and prevents it from propagating into the rock mass. The blast wave on the other side directly propagates into the rock mass, causing the rock mass to rupture, which can realize the directional propagation and directional isolation of the blast wave, break the rock mass that needs to be blasted, and keep the rock mass that does not need to be blasted intact, not only reducing the disturbance to the surrounding rock, but also solving the problem of overbreak and underbreak of the tunnel;

[0011] (2) The directional isolation buffer blast tube can be reused, saving costs;

[0012] (3) The hoop can fix the cartridge and is convenient for installing the cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the directional isolation buffer blast tube of the utility model;

[0014] Figure 2 is Figure 1 The sectional view taken along line A-A in

[0015] Figure 3 is Figure 1 The sectional view taken along line B-B in

[0016] Figure 4 It is an assembly schematic diagram of the directional isolation buffer blast tube and the cartridge of the utility model;

[0017] Figure 5 It is a schematic diagram of the principle of isolating blast wave by the directional isolation buffer blast tube of the utility model;

[0018] As Figures 1 to 5 shown, the marks in the figure are respectively represented as:

[0019] 1. Directional isolation buffer blast tube, 2. Tunnel face rock mass, 3. Blocking material, 4. Cartridge, 5. Blast wave, 6. Crack;

[0020] 11. Semi-circular outer cylinder, 12. Semi-circular inner cylinder, 13. Axial end plate, 14. Radial end plate, 15. Hoop, 16. Energy dissipation material, 17. Cartridge placement cylinder, 18. Cartridge placement hole. DETAILED DESCRIPTION OF THE INVENTION

[0021] The features of the present utility model and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments for the understanding of those skilled in the same industry:

[0022] Embodiment: As Figures 1 to 5 shown, this embodiment relates to a directional isolation buffer barrel. The directional isolation buffer barrel 1 mainly includes a semi-circular outer barrel 11, a semi-circular inner barrel 12, an axial end plate 13, a radial end plate 14, a hoop 15, and an energy dissipation material 16. The semi-circular outer barrel 11 and the semi-circular inner barrel 12 are coaxially arranged. The inner diameter of the semi-circular outer barrel 11 is larger than the inner diameter of the semi-circular inner barrel 12. The radial sides of the semi-circular outer barrel 11 and the semi-circular inner barrel 12 are connected by a radial end plate 14, and the axial sides of the semi-circular outer barrel 11 and the semi-circular inner barrel 12 are connected by an axial end plate 13. A closed space is formed among the semi-circular outer barrel 11, the semi-circular inner barrel 12, the radial end plate 14, and the axial end plate 13, and this closed space is used to fill the energy dissipation material 16. In this embodiment, the energy dissipation material 16 can be rubber, granular material, liquid material, or porous material.

[0023] As Figures 1 to 4 shown, the inner side of the semi-circular inner barrel 12 is used to place the cartridge 4, and hoops 15 are provided at both ends of the semi-circular inner barrel 12. The hoops 15 can fix the cartridge 4. In this embodiment, a cartridge placement barrel 17 is formed between the semi-circular inner barrel 12 and the hoop 15. The size and shape of the cartridge placement hole 18 of the cartridge placement barrel 17 respectively correspond to the size and shape of the cartridge 4 to ensure the reliability of the installation of the cartridge 4.

[0024] As Figure 5 shown, the directional isolation buffer barrel 1 filled with the cartridge 4 is placed into the peripheral blast holes of the face rock mass 2, and the peripheral blast holes are plugged with a plugging material 3 (selecting mortar or plugging mud). The cartridge 4 is detonated, and the explosive wave 5 propagates circumferentially. The energy dissipation material 16 absorbs the explosive wave 5 and prevents it from propagating into the rock mass. The explosive wave 5 on the other side directly propagates into the rock mass, causing the rock mass to rupture (cracks 6 are generated), realizing the directional propagation and directional isolation of the explosive wave 5, making the rock mass to be blasted broken and the rock mass that does not need to be blasted remain intact.

[0025] The beneficial technical effects of this embodiment are:

[0026] (1) The energy dissipation material absorbs the explosive wave and prevents it from propagating into the rock mass. The explosive wave on the other side directly propagates into the rock mass, causing the rock mass to rupture, which can realize the directional propagation and directional isolation of the explosive wave, making the rock mass to be blasted broken and the rock mass that does not need to be blasted remain intact, not only reducing the disturbance to the surrounding rock, but also solving the problem of overbreak and underbreak of the tunnel;

[0027] (2) The directional isolation buffer barrel can be reused, saving costs;

[0028] (3) The hoop can fix the cartridge, and it is convenient to install the cartridge.

[0029] Although the above embodiments have been described in detail with reference to the drawings for the concept and embodiments of the purpose of the present invention, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims. Therefore, they will not be elaborated one by one here.

Claims

1. A directional isolation buffer barrel, characterized in that: The described directional isolation buffer cartridge includes a semi-circular outer cylinder and a semi-circular inner cylinder arranged coaxially. The radial sides of the semi-circular outer cylinder and the semi-circular inner cylinder are connected by a radial end plate, and the axial sides of the semi-circular outer cylinder and the semi-circular inner cylinder are connected by an axial end plate. A space for filling energy-absorbing material is formed among the semi-circular outer cylinder, the semi-circular inner cylinder, the radial end plate, and the axial end plate. The inner side of the semi-circular inner cylinder is used for placing cartridges.

2. The directional isolation buffer barrel according to claim 1, wherein: Hoops for fixing the cartridges are provided at both ends of the semi-circular inner cylinder.

3. The directional isolation buffer barrel according to claim 2, characterized in that: A cartridge placement cylinder is formed between the semi-circular inner cylinder and the hoop. The size and shape of the cartridge placement holes of the cartridge placement cylinder respectively correspond to the size and shape of the cartridges.

4. The directional isolation buffer barrel according to claim 1, characterized in that: The directional isolation buffer cartridge containing the cartridges is placed in the peripheral blast holes of the tunnel face rock mass, and the peripheral blast holes are sealed with a sealing material.

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