CN217300576U

CN217300576U - Rock tunnel splitting and blasting coupling structure

Info

Publication number: CN217300576U
Application number: CN202122941912.7U
Authority: CN
Inventors: 陈士海; 陈春超; 刘闽龙
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-08-26
Anticipated expiration: 2031-11-26

Abstract

The utility model provides a rock tunnel splitting and blasting coupling structure, the splitting and blasting coupling structure comprises a splitting structure and a blasting structure, the splitting structure comprises a hydraulic splitting machine and a splitting hole, and the hydraulic splitting machine is arranged in the splitting hole; the blasting structure includes the big gun hole, the big gun hole sets up the spacer, and the explosive passes through the spacer to be separated, the utility model provides a rock tunnel splitting and blasting coupling structure can guarantee tunnel construction environment security, promotes the construction speed in tunnel simultaneously.

Description

Rock tunnel splitting and blasting coupling structure

Technical Field

The utility model relates to a tunnel engineering field, especially a rock tunnel splitting and blasting coupled structure.

Background

At present, with the continuous improvement of urban railway lines, tunnel construction environments become more complex, and the three-dimensional interaction of new and old railway lines cannot be avoided, which puts higher requirements on tunnel construction technologies. The drilling and blasting method is widely applied to the construction of urban underground space due to the characteristics of economy, high efficiency and the like, and obtains great economic and social benefits. However, the interactive railway line tunnel engineering is very harsh on blasting vibration control, and requires that the vibration peak speed of the existing railway line is controlled in a very small range, and the normal operation of the railway line is not influenced.

But the conventional tunnel blasting vibration is large at present, and the blasting vibration control requirement of the interactive railway line tunnel engineering is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned defect among the prior art is overcome to main aim at, provides a rock tunnel splitting blasting structure in advance, can guarantee tunnel construction environment's safety, promotes the tunnel tunnelling speed simultaneously.

The utility model adopts the following technical scheme:

a rock tunnel splitting and blasting coupling structure comprises a splitting structure and a blasting structure, wherein the splitting structure comprises a hydraulic splitter and a splitting hole, and the hydraulic splitter is arranged in the splitting hole; the pre-blasting structure comprises a blast hole, the blast hole is provided with a spacer, explosives are separated through the spacer, and the splitting hole comprises a first splitting hole and a second splitting hole.

In particular, the first cleaving hole is arranged on the tunnel profile.

Specifically, the second splitting holes are arranged on the tunnel face and perpendicular to the tunnel face.

Specifically, the second splitting holes are symmetrically arranged.

Specifically, the diameter of the splitting hole is the same as that of the hydraulic splitting machine, the depth of the splitting hole is the same as the length of the working end of the hydraulic splitting machine, and the pitch of the splitting hole is the splitting radius of the hydraulic splitting machine.

Specifically, the blasting structure still includes, the detonator arranges in the big gun hole explosive section, and the wire draws outside the big gun hole, packs the stemming in the big gun hole.

In particular, the spacer is a sealed plastic bag filled with air.

It is right from the above-mentioned description of the utility model discloses, compare with prior art, the utility model discloses following beneficial effect has:

the utility model provides a rock tunnel splitting and blasting coupled structure, the pre-splitting blasting structure comprises a splitting structure and a blasting structure, the splitting structure comprises a hydraulic splitter and a splitting hole, and the hydraulic splitter is arranged in the splitting hole; the blasting structure comprises blast holes, wherein the blast holes are provided with spacers, and explosives are separated by the spacers; the structure can ensure the safety of the tunnel construction environment and simultaneously improve the tunneling speed of the tunnel.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of a tunnel according to the present invention;

fig. 2 is a schematic diagram of splitting hole arrangement in the splitting structure of the present invention;

FIG. 3 is a view showing arrangement of blast holes on the face of the present invention;

fig. 4 is a diagram of the blasting structure of the present invention.

Wherein the tunnel profile 1; a tunnel face 2; a first cleavage hole 3; a second cleavage hole 4; an inter-hole slit 5; an irregular split rock block 6; a prism split rock block 7; a blast hole 8; an explosive 9; an air spacer (10); a detonator 11; a lead wire 12; and (4) stemming 13.

Detailed Description

The present invention is further described below in the following with reference to specific embodiments.

A rock tunnel splitting and blasting coupling structure comprises a splitting structure and a blasting structure, wherein the splitting structure comprises a hydraulic splitter and a splitting hole, and the hydraulic splitter is arranged in the splitting hole; the blasting structure includes the big gun hole, the big gun hole sets up the spacer, and the explosive passes through the spacer to be separated, splits the hole and includes first splitting hole and second splitting hole.

Fig. 1 is a schematic cross-sectional view of a tunnel, which includes a tunnel contour 1 and a tunnel face 2;

as shown in fig. 2, the schematic diagram of the arrangement of the cleavage holes in the cleavage structure includes a first cleavage hole 3 arranged on the tunnel profile, and a second cleavage hole 4 arranged in the tunnel face, where the first cleavage hole 3 and the second cleavage hole 4 arranged on the tunnel face and the tunnel profile are perpendicular to the tunnel face; the first split holes 3 arranged on the tunnel outline and the second split holes 4 arranged in the tunnel face are symmetrically arranged;

specifically, the diameters of the first splitting hole 3 and the second splitting hole 4 are the same as the diameter of the hydraulic splitting machine, the depths of the first splitting hole 3 and the second splitting hole 4 are the same as the length of the working end of the hydraulic splitting machine, and the pitch of the first splitting hole 3 and the second splitting hole 4 is the splitting radius of the hydraulic splitting machine.

During specific work, because first splitting hole 3, second splitting hole 4 are more in quantity, need divide and accomplish many times, during single splitting, need carry out apart the hole splitting, need separate a first splitting hole 3, second splitting hole 4 between two hydraulic pressure splitting machines promptly to induced crack 5 distributes along the hole. Under the action of the hydraulic splitting machine, cracks 5 appear between holes, and rocks on the tunnel face 2 are split into

rock blocks

6 and 7 with certain sizes. The split rock mass has two forms, one being a regular prism 7 which is not connected to the tunnel profile and the other being an irregular pillar 6 which is connected to the tunnel profile.

The blasting structure comprises blast holes, and fig. 3 is a layout diagram of the blast holes on the face of the tunnel of the utility model;

fig. 4 is a diagram of the blasting structure of the present invention;

the blast hole 8 is provided with a spacer 10, and the explosive 9 is separated by the spacer 10; the spacer 10 is a sealed plastic bag filled with air; the detonator 11 is arranged in the explosive section 9 in the blast hole, the lead 12 is led out of the blast hole, and the blast hole is filled with stemming 13;

during specific work, a rock drill is adopted to arrange a blast hole 8 in the centers of the splitting

rock blocks

6 and 7, and the depth of the blast hole 8 is the same as that of the first splitting hole 3 and the second splitting hole 4; after drilling is finished, the explosives 9 and the explosives 9 are separated by an air spacer 10, the air spacer is a sealed plastic bag filled with air and is arranged in the blast hole in a structure mode of separated charging, meanwhile, a detonator 11 is arranged in an explosive section in the hole, a lead 12 is led out of the blast hole, the blast hole is filled by using blast mud 13, and then hole-by-hole blasting is finished.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. The utility model provides a rock tunnel splitting and blasting coupled structure which characterized in that: the splitting and blasting coupling structure comprises a splitting structure and a blasting structure, the splitting structure comprises a hydraulic splitter and a splitting hole, and the hydraulic splitter is arranged in the splitting hole; the blasting structure includes the big gun hole, the big gun hole sets up the spacer, and the explosive separates through the spacer, and the splitting hole includes first splitting hole and second splitting hole.

2. A rock tunnel splitting and blasting coupling structure according to claim 1, wherein the first splitting hole is arranged in the tunnel profile.

3. A rock tunnel cleaving and blasting coupling structure according to claim 1, wherein the second cleaving hole is arranged on and perpendicular to the tunnel face.

4. A rock tunnel cleaving and blasting coupling structure according to claim 3, wherein the second cleaving holes are arranged symmetrically.

5. The rock tunnel splitting and blasting coupling structure of claim 1, wherein the diameter of the splitting hole is the same as that of the hydraulic splitter, the depth of the splitting hole is the same as the length of the working end of the hydraulic splitter, and the pitch of the splitting hole is the splitting radius of the hydraulic splitter.

6. The rock tunnel splitting and blasting coupling structure of claim 1, wherein the blasting structure further comprises a detonator disposed in the explosive section in the blast hole, a wire led out of the blast hole, and stemming filled in the blast hole mouth.

7. The rock tunnel cleaving and blasting coupling structure of claim 1, wherein the spacer is a sealed plastic bag filled with air.