Tunnel drilling and blasting excavation shaped charge and joint cutting combined cartridge bag structure

Abstract

The utility model discloses a tunnel drilling and blasting excavation energy-gathered charging and joint-cutting combined cartridge bag structure which is characterized in that the section of a cartridge bag is a plurality of obtuse angle sectors (paraffin is filled in a notch), an outer wrapping pipe is a PVC joint-cutting pipe, peripheral holes are constructed, the cartridge bag is placed in shot holes, and the outer wrapping pipe is a PVC joint-cutting pipe, so that the tunnel drilling and blasting excavation energy-gathered charging and joint-cutting combined cartridge bag structure is formed. The slotting holes and the auxiliary holes are filled into a common medicine bag; and a new tunnel face is formed after blasting is completed. According to the explosive loading structure, rock mass can be effectively excavated, explosive loading amount can be reduced, surrounding rock cracks caused by engineering blasting are reduced, and the effect of protecting surrounding rock is achieved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of civil engineering and the field of high-level waste geological disposal, and particularly relates to a tunnel drilling and blasting excavation construction method. BACKGROUND

[0002] With the development of global nuclear power industry and related nuclear industry activities, a large amount of high-level waste is temporarily stored on the ground. In order to permanently isolate it from the living environment of human beings, various permanent disposal schemes are proposed by countries. Among the high-level waste permanent disposal schemes, deep geological disposal is the most feasible.

[0003] The excavation of the high-level waste geological disposal chamber is generally constructed by drilling and blasting method, however, the cracks caused by the damage of surrounding rock due to blasting may increase the probability of nuclide migration. Therefore, we hope that a method can efficiently blast rock and cause less damage to the surrounding rock during blasting.

[0004] At present, the traditional smooth blasting construction method is to place a cylindrical charge in the blast hole, and a section is formed after blasting. A small amount of overbreak can be achieved during blasting, but underbreak cannot be achieved, so the traditional smooth blasting charge is slightly more, thereby causing greater damage to the surrounding rock. This is not a big problem in general tunnel construction, but high-level waste geological disposal requires efficient rock breaking and reduced damage to the surrounding rock to reduce the probability of nuclide migration along groundwater. SUMMARY

[0005] At present, the traditional smooth blasting construction method is to place a cylindrical charge in the blast hole. In order to solve some defects of the traditional method, a tunnel drilling and blasting excavation combined structure of energy-gathering charge and slit charge is invented, which comprises: the section of the charge is a three-blunt-angle sector, a taper angle is formed by filling paraffin in the notch, the outer wrapping pipe is a PVC slit pipe, and the pipe slit corresponds to the taper angle. When the charge is placed, the taper angles on both sides are symmetrically along the direction of the tunnel contour line, and the individual taper angle faces the tunnel inward along the normal direction of the tunnel contour line.

[0006] The purpose of the embodiment of the present application is to provide a new charge structure during tunnel drilling and blasting excavation, which can effectively reduce the damage to the surrounding rock during blasting and reduce the probability of nuclide migration along the cracks of the surrounding rock in the later stage of the high-level waste geological disposal repository.

[0007] In order to achieve the above purpose, the embodiment of the present application mainly provides the following technical scheme:

[0008] Firstly, the section of the charge is a three-blunt-angle sector, and a taper angle is formed by filling paraffin in the notch.

[0009] Secondly, the outer wrapping pipe is a PVC slit pipe, and the pipe slit corresponds to the taper angle.

[0010] Third step, the two sides of the axis symmetry cone angle tunnel profile direction, the single cone angle is along the tunnel profile normal direction towards the tunnel.

[0011] Fourth step, the peripheral eye construction, the medicine package is packed into the blast hole, the slot hole and the auxiliary eye are packed into the common medicine package, the blasting sequence is: the slot hole-the auxiliary eye-the peripheral eye, and the new working face is formed after the blasting is completed. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a medicine package cross-sectional view of the utility model.

[0013] Fig. 2 is a three-dimensional schematic diagram of the medicine package (cut off).

[0014] Fig. 3 is a three-dimensional schematic diagram of the medicine package (complete).

[0015] Fig. 4 is a schematic diagram of the blasting scheme. DETAILED DESCRIPTION

[0016] The following describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the description.

[0017] In the following description, specific details are set forth in order to provide a thorough understanding of the application. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In other instances, well-known construction tools, construction materials, construction methods and safety measures are not described in detail in order not to obscure the description of the application with unnecessary details.

[0018] In the description of the present application, it should be understood that the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] Fig. 1 is a medicine package cross-sectional view of the utility model. The tunnel drilling and blasting excavation is combined with the cut seam medicine package structure:

[0021] First step, the medicine package cross section is three obtuse angle sectors, and the notch is filled with paraffin to form a cone angle.

[0022] Second step, the outer package pipe is a PVC cut seam pipe, and the pipe seam corresponds to the cone angle.

[0023] The third step is that the two sides of the axis symmetry cone angle tunnel profile direction, the single cone angle is along the tunnel profile normal direction towards the tunnel.

[0024] The fourth step is to pack the explosive into the blast hole, the cut hole and the auxiliary hole, and the normal hole, and the blasting sequence is: the cut hole, the auxiliary hole and the normal hole, and a new working face is formed after the blasting is completed.

[0025] Figure 2 is a three-dimensional schematic diagram of the explosive package (cut).

[0026] Figure 3 is a three-dimensional schematic diagram of the explosive package (complete).

[0027] Figure 4 is a schematic diagram of the blasting scheme, 1-47 blast holes are empty holes, cut holes and caving holes, 48-84 are normal holes, the normal hole is packed with a shaped charge combined with a cut seam explosive package structure, when the explosive package is placed, the two sides of the axis symmetry cone angle are along the tunnel profile direction, and the single cone angle is along the tunnel profile normal direction towards the tunnel.

[0028] In addition, the cross section of the explosive package mentioned in the tunnel drilling and blasting excavation shaped charge combined with a cut seam explosive package structure is three sectors, and three cone angles are formed, and the cross section of the explosive package with other number of sectors and cone angles cannot be excluded; the paraffin is filled in the cone angle, and other materials cannot be excluded; the cut seam of the explosive package is three corresponding to the cone angle, and other number of cut seams of the explosive package cannot be excluded. Other structures and effects are known to those skilled in the art, and in order to reduce redundancy, they will not be described here.

[0029] The above described specific structure mode further details the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above description is only a specific implementation method of the utility model, and is not used to limit the protection scope of the utility model, and any modification, equivalent replacement, improvement, etc. made on the basis of the technical scheme of the utility model should be included in the protection scope of the utility model.

Claims

1. A structure of a tunnel drilling and blasting excavation combined with a cut joint charge pack, characterized in that, The structure comprises: The cross section of the charge is three obtuse angle sectors, and the gaps are filled with paraffin to form three cone angles; the outer wrapping tube is a PVC slit tube, and the tube slit corresponds to the cone angle; the structure charge is placed in the peripheral eye, and when the charge is placed, the two side axis symmetrical cone angles are along the direction of the tunnel contour line, and the single cone angle is along the normal direction of the tunnel contour line and faces the tunnel.

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