CN111023927B - Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel - Google Patents
Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel Download PDFInfo
- Publication number
- CN111023927B CN111023927B CN201911212157.XA CN201911212157A CN111023927B CN 111023927 B CN111023927 B CN 111023927B CN 201911212157 A CN201911212157 A CN 201911212157A CN 111023927 B CN111023927 B CN 111023927B
- Authority
- CN
- China
- Prior art keywords
- holes
- hole
- auxiliary
- tunnel
- explosive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011435 rock Substances 0.000 title claims abstract description 33
- 238000004880 explosion Methods 0.000 title claims description 17
- 239000002360 explosive Substances 0.000 claims abstract description 80
- 238000005422 blasting Methods 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 30
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 14
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 14
- 241001330002 Bambuseae Species 0.000 claims description 14
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 14
- 239000011425 bamboo Substances 0.000 claims description 14
- 238000013016 damping Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 3
- 238000005474 detonation Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a soft rock single-step deep hole undermining vibration-reduction flat-bottom smooth blasting structure in a tunnel, wherein a plurality of blast holes are arranged in the tunnel to be blasted, explosives are arranged in the blast holes, the blast holes comprise peripheral holes, slot expanding holes, undermining holes, auxiliary holes and bottom plate holes, the explosive with a continuous charging structure is arranged in the slot expanding holes, the auxiliary holes and the bottom plate holes, the explosive with a spaced charging structure is arranged in the peripheral holes, and each blast hole opening is blocked by stemming. According to the invention, the arrangement of the positions of the blast holes and the arrangement of the explosives with different structures in the blast holes are realized, and the explosives are blocked in the blast holes through stemming, so that the explosive stress and explosive gas of the explosives are blocked in the blast holes, the rock breaking time is prolonged, the blasting energy utilization rate is enhanced, the footage is improved, the blasting vibration is reduced, the self-stability of surrounding rocks is improved, and the construction speed is greatly improved.
Description
Technical Field
The invention relates to the technical field of soft rock blasting, in particular to a soft rock single-step deep hole undermining vibration-damping flat-bottom smooth blasting structure in a tunnel.
Background
When the high-speed railway double-track tunnel is constructed, an import work area and an export work area are organized and constructed, wherein the import work area and the export work area respectively bear a section of positive hole. The construction is carried out by adopting a three-step synchronous drilling and blasting method, and the quality of upper step undercutting and light blasting is the key for determining the cyclic excavation scale feeding and the super-underexcavation effect of the tunnel. In the prior art, soft rock blasting footage is less, over-underexcavation control is poor, and surrounding rock self-stability is poor.
Disclosure of Invention
The invention aims to provide a soft rock single-step deep hole undermining vibration-damping flat-bottom smooth blasting structure in a tunnel, which aims to solve the problems in the prior art, improve the blasting energy utilization rate and footage, reduce blasting vibration, improve the self-stability of surrounding rocks and greatly improve the construction speed.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a soft rock single-step deep hole undermining vibration-reduction flat-bottom smooth blasting structure in a tunnel, wherein a plurality of blastholes are arranged in a tunnel to be blasted, explosives are arranged in the blastholes, the blastholes comprise peripheral holes, slot expanding holes, undercut holes, auxiliary holes and bottom plate holes, the explosive with a continuous charging structure is arranged in the slot expanding holes, the undercut holes, the auxiliary holes and the bottom plate holes, the peripheral holes are provided with the explosives with a spaced charging structure, each blasthole opening is blocked by stemming, the peripheral holes are uniformly arranged along the arched edge of the cross section of the tunnel to be blasted, the bottom plate holes are uniformly arranged along the bottom edge of the cross section of the tunnel to be blasted, the auxiliary holes comprise first auxiliary holes, second auxiliary holes and third auxiliary holes, the first auxiliary holes are arranged on the inner sides of the peripheral holes, and the undercut expanding holes comprise first undercut hole expanding holes, The second slot expanding hole, the third slot expanding hole and the fourth slot expanding hole are arranged on the inner side of the first auxiliary hole, the underholing hole, the second slot expanding hole, the third slot expanding hole, the fourth slot expanding hole, the second auxiliary hole and the third auxiliary hole are symmetrically arranged along the vertical center line of the cross section of the tunnel to be blasted in a bilateral mode, and the underholing hole, the second slot expanding hole, the third slot expanding hole, the fourth slot expanding hole, the second auxiliary hole and the third auxiliary hole are sequentially arranged from inside to outside.
Preferably, the straight line formed by connecting the center points of the cross sections of a plurality of the cutting holes on each side forms an angle of 15 degrees with the vertical direction.
Preferably, the depth of the cut hole is 4.6-4.84 m; the depth of the second slot expanding hole is 4.53 m; the depth of the third slot expanding hole is 4.3 m; the depth of the fourth slot expanding hole is 4.0 m; the auxiliary eye, the peripheral eye and the baseplate eye are all 4.0m in depth.
Preferably, the cutting holes include a first cutting hole and a second cutting hole, the first cutting hole is 66 degrees with respect to the cross section of the tunnel to be blasted, and the second cutting hole is 60 degrees with respect to the cross section of the tunnel to be blasted.
Preferably, each second slot expanding hole and the cross section of the tunnel to be blasted form an angle of 68 degrees; each third slot expanding hole is 78 degrees with the cross section of the tunnel to be blasted.
Preferably, each of the peripheral holes, each of the auxiliary holes, each of the baseplate holes, each of the first slot expanding holes and the fourth slot expanding holes are arranged perpendicular to the cross section of the tunnel to be blasted.
Preferably, the arcs where the section center points of the plurality of auxiliary eyes are located, the arcs where the section center points of the plurality of peripheral eyes are located, and the arcs where the section center points of the plurality of first slotting eyes are located are parallel to each other.
Preferably, the explosive of continuous charge structure includes first explosive roll, first explosive roll is fixed to be set up on first bamboo chip, the inboard of first explosive roll is provided with first detonator, be connected with first detonator on the first detonator, the free end of first detonator stretches out the big gun hole, first bamboo chip with the big gun hole mouth adopts the stemming shutoff.
Preferably, the explosive of interval loading structure includes a plurality of second explosive rolls, and is a plurality of the second explosive roll interval is fixed to be set up on the second bamboo chip and adjacent adopt the wire to connect between the second explosive roll, the innermost the inboard of second explosive roll is provided with the second detonator, be connected with the second detonator on the second detonator, the free end of second detonator stretches out the porthole, the second bamboo chip with the porthole mouth adopts the stemming shutoff.
Preferably, the stemming seal of the explosive of the continuous charge structure has a length of more than 30 cm; the stemming plug of the explosive of the spaced loading structure is longer than 100 cm.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the arrangement of the positions of the blast holes and the arrangement of the explosives with different structures in the blast holes are realized, and the explosives are blocked in the blast holes through stemming, so that the explosive stress and explosive gas of the explosives are blocked in the blast holes, the rock breaking time is prolonged, the blasting energy utilization rate is enhanced, the footage is improved, the blasting vibration is reduced, the self-stability of surrounding rocks is improved, and the construction speed is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the positions of blast holes of a soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in a tunnel;
FIG. 2 is a schematic diagram of inclination angles of blast holes of a soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in a tunnel;
FIG. 3 is a schematic illustration of the explosive structure of the continuous charge structure of the present invention;
FIG. 4 is a schematic illustration of the explosive structure of the spaced charge configuration of the present invention;
wherein: 1-peripheral hole, 2-first slotting hole, 3-second slotting hole, 4-third slotting hole, 5-fourth slotting hole, 6-first slotting hole, 7-second slotting hole, 8-first auxiliary hole, 9-second auxiliary hole, 10-third auxiliary hole, 11-first explosive roll, 12-first bamboo chip, 13-first detonator, 14-first detonating tube, 15-second explosive roll, 16-second bamboo chip, 17-second detonator, 18-second detonating tube, 19-stemming and 20-baseplate hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide a soft rock single-step deep hole undermining vibration-damping flat-bottom smooth blasting structure in a tunnel, which aims to solve the problems in the prior art, improve the blasting energy utilization rate and footage, reduce blasting vibration, improve the self-stability of surrounding rocks and greatly improve the construction speed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-4: the embodiment provides a soft rock single-step deep hole undermining vibration reduction flat-bottom smooth blasting structure in a tunnel, a plurality of blastholes are arranged in the tunnel to be blasted, explosives are arranged in the blastholes, the blastholes comprise peripheral holes 1, undermining holes, auxiliary holes and bottom plate holes 20, the blastholes, the undermining holes, the auxiliary holes and the bottom plate holes 20 are all internally provided with the explosives with continuous explosive charging structures, the peripheral holes 1 are provided with the explosives with spaced explosive charging structures, each blasthole opening is blocked by stemming 19, the peripheral holes 1 are uniformly arranged along the arched edge of the cross section of the tunnel to be blasted, the bottom plate holes 20 are uniformly arranged along the bottom edge of the cross section of the tunnel to be blasted, the auxiliary holes comprise first auxiliary holes 8, second auxiliary holes 9 and third auxiliary holes 10, the first auxiliary holes 8 are arranged on the inner sides of the peripheral holes 1, the undermining holes comprise first undermining holes 2, second undermining holes 3, third undermining holes 4 and fourth undermining holes 5, first reaming eye 2 sets up in the inboard of first supplementary eye 8, and the undermining eye, second reaming eye 3, third reaming eye 4, fourth reaming eye 5, the supplementary eye 9 of second and the supplementary eye 10 of third all set up and undermining eye, second reaming eye 3, third reaming eye 4, fourth reaming eye 5, the supplementary eye 9 of second and the supplementary eye 10 of third from interior to exterior sets gradually along the vertical center line bilateral symmetry of the cross section of treating the blasting tunnel. Fig. 1 is a schematic diagram of a cross section of a tunnel to be blasted, the setting positions of blastholes can be seen from fig. 1, in the embodiment, the arrangement of the positions of the blastholes and explosives with different structures arranged in the blastholes are arranged, the explosives are blocked in the blastholes through stemming 19, so that the explosive explosion stress and explosive gas are blocked in the blastholes, the rock breaking time is prolonged, the blasting energy utilization rate is enhanced, the advance length is improved, the blasting vibration is reduced, the self-stability of surrounding rocks is improved, and the construction speed is greatly improved.
In this embodiment, the explosive with a continuous charging structure includes a first explosive cartridge 11, the first explosive cartridge 11 is composed of a plurality of explosive cartridges, the first explosive cartridge 11 is fixedly arranged on a first bamboo chip 12, a first detonator 13 is arranged on the inner side of the first explosive cartridge 11, a first detonating tube 14 is connected to the first detonator 13, the free end of the first detonating tube 14 extends out of a blasthole, and the first bamboo chip 12 and the blasthole are plugged by a stemming 19.
In this embodiment, the explosive of the spaced loading structure includes a plurality of second explosive sticks 15, the interval between the second explosive sticks 15 is 0.55m, the plurality of second explosive sticks 15 are fixedly arranged on the second bamboo chip 16 at intervals, the adjacent second explosive sticks 15 are connected by a conducting wire, the inner side of the innermost second explosive stick 15 is provided with a second detonator 17, the second detonator 17 is connected with a second detonating tube 18, the free end of the second detonating tube 18 extends out of the blasthole, and the second bamboo chip 16 and the blasthole are plugged by a stemming 19.
In this embodiment, the explosives with the continuous charging structure and the explosives with the spaced charging structure are all subjected to reverse blasting, that is, the first detonator 13 and the second detonator 17 are all arranged at the bottom of the gun hole, and after the first detonator 13 and the second detonator 17 are detonated, the detonating is gradually conducted from inside to outside. The decoupling coefficients of the explosive of the continuous charging structure and the decoupling coefficients of the spaced charging structure are both 1.25-1.56.
In this embodiment, the peripheral holes 1 are provided with explosives with a spaced loading structure, so that the loading density is reduced, the first explosive roll 11 and the second explosive roll 15 in the blasthole have certain gaps with the rock wall, the explosion violence is reduced, the second explosive roll 15 is bound on the second bamboo chip 16 according to a certain distance, after explosion propagation, the explosion stress and the explosion gas are almost evenly dispersed on the length of the whole blasthole, the stress on the inner wall of the blasthole is even, the peripheral holes 1 are cut off from the middle by the tensile stress, half-edge residual holes are left, the light explosion effect is good, the forming is attractive, and the overbreak is reduced. The length of the stemming 19 plug of the explosive with the continuous charging structure is more than 30 cm; the length of the stemming 19 plug of the explosive with the interval charging structure is more than 100 cm; the stemming 19 is made of clay. The stemming 19 is blocked, the explosive explosion stress and the explosive gas are blocked in the blasthole, the rock breaking time is prolonged, the blasting energy utilization rate is enhanced, the footage is improved, the blasting vibration is reduced, the self-stability capability of the surrounding rock is improved, and the construction speed is greatly improved.
In the embodiment, the straight line formed by connecting the central points of the cross sections of the plurality of the cutting holes on each side forms 15 degrees with the vertical direction, the distance between the cutting hole at the uppermost end and the central line of the tunnel to be blasted is 2.0 meters, the distance between the cutting hole at the lowermost end and the central line of the tunnel to be blasted is 2.5 meters, the plurality of second reaming holes 3, the plurality of third reaming holes 4, the plurality of fourth reaming holes 5, the plurality of second auxiliary holes 9 and the plurality of third auxiliary holes 10 on each side are respectively vertically arranged, the distance between the vertical rows formed by the plurality of second reaming holes 3, the plurality of third reaming holes 4, the plurality of fourth reaming holes 5, the plurality of second auxiliary holes 9 and the plurality of third auxiliary holes 10 on each side is 0.5 meters, the lowest cutting hole, the second slot expanding hole 3, the third slot expanding hole 4, the fourth slot expanding hole 5, the second auxiliary hole 9 and the third auxiliary hole 10 on the two sides are positioned on the same horizontal plane, and the distance between the lowest cutting hole, the second slot expanding hole 3, the third slot expanding hole 4, the fourth slot expanding hole 5, the second auxiliary hole 9 and the third auxiliary hole 10 and the horizontal plane where each bottom plate hole 20 is positioned is 0.5 m.
In this embodiment, the arcs where the cross-sectional center points of the plurality of auxiliary eyes are located, the arcs where the cross-sectional center points of the plurality of peripheral eyes 1 are located, and the arcs where the cross-sectional center points of the plurality of first reaming eyes 2 are located are parallel to each other.
As shown in table 1, in the present embodiment, the number of the peripheral eyes 1 is 45, and the pitch between the peripheral eyes 1 is 0.43 m; 26 first auxiliary eyes 8 are arranged, the distance between the first auxiliary eyes 8 is 0.65m, and the distance between the peripheral eyes 1 and the first auxiliary eyes 8 is 0.5 m; the number of the second auxiliary eyes 9 on each side is 2, and the distance between the second auxiliary eyes 9 on each side is 1.5 m; the number of the third auxiliary eyes 10 on each side is 2, and the distance between the third auxiliary eyes 10 on each side is 1.0 m; the number of the first slot expanding holes 2 is 5, the distance between the first slot expanding holes 2 is 1.3m, and the distance between the first slot expanding holes 2 and the first auxiliary holes 8 is 1.0 m; the number of the second slot expanding holes 3 on each side is 4, and the distance between the second slot expanding holes 3 on each side is 0.665 m; the number of the third slot expanding holes 4 on each side is 3, and the distance between the third slot expanding holes 4 on each side is 1.0 m; the number of the fourth slot expanding holes 5 on each side is 3, and the distance between the fourth slot expanding holes 5 on each side is 1.0 m; the number of the cutting holes on each side is 4, and the distance between the cutting holes on each side is 0.665 m; the number of the bottom plate holes 20 is 9, and the distance between the bottom plate holes 20 is 1.5 m.
In the embodiment, the depth of the cut hole is 4.6-4.84 m; the depth of the second slot expanding eye 3 is 4.53 m; the depth of the third slot expanding hole 4 is 4.3 m; the depth of the fourth slot expanding hole 5 is 4.0 m; the auxiliary eye, the peripheral eye 1 and the floor eye 20 are all 4.0m deep. In the embodiment, except that the bottom falling depth of the cutting hole is slightly deeper, other blast holes are basically controlled in a plane, and are blocked by the stemming 19, so that the bottom blasting force of the blast hole is enhanced, the utilization rate of the blast holes is improved, the blasted tunnel face is basically a plane, the convenience in hole positioning and drilling is facilitated when the next blast hole is drilled, and virtuous circle is formed.
In this embodiment, each peripheral hole 1, each auxiliary hole, each baseplate hole 20, each first slot expanding hole 2, and each fourth slot expanding hole 5 are all arranged perpendicular to the cross section of the tunnel to be blasted. The cutting holes comprise a first cutting hole 6 and a second cutting hole 7, the first cutting hole 6 is 66 degrees relative to the cross section of the tunnel to be blasted, and the second cutting hole 7 is 60 degrees relative to the cross section of the tunnel to be blasted. The cross section of each second slot expanding hole 3 and the tunnel to be blasted is 68 degrees; each third slot-expanding eye 4 is 78 degrees from the cross section of the tunnel to be blasted.
TABLE 1 blasting parameter table
The detonation sequence of each blasthole in the embodiment is as follows: the first and second slitting holes 6 and 7 are detonated simultaneously → the second reaming hole 3 is detonated → the first and third reaming holes 2 and 4 are detonated simultaneously → the fourth reaming hole 5 is detonated → the second auxiliary hole 9 is detonated → the third auxiliary hole 10 is detonated → the first auxiliary hole 8 is detonated → the peripheral hole 1 and the floor hole 20 are detonated simultaneously. In this example, a total of 121 blastholes were provided, and 190.6kg of explosive was used. The soft rock single-step deep hole undermining vibration-damping flat-bottom smooth blasting structure in the tunnel is adopted for blasting, so that the blasting energy utilization rate is enhanced, the scale feeding is improved, the blasting vibration is reduced, the self-stability capability of surrounding rocks is improved, and the construction speed is greatly improved.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a soft rock single-step deep hole undercutting damping flat-bottom light explodes structure in tunnel which characterized in that: the blasting method comprises the steps that a plurality of blast holes are arranged in a tunnel to be blasted, explosives are arranged in the plurality of blast holes, the blast holes comprise peripheral holes, slot expanding holes, cut holes, auxiliary holes and bottom plate holes, the slot expanding holes, the cut holes, the auxiliary holes and the bottom plate holes are all internally provided with explosives with continuous explosive loading structures, the peripheral holes are provided with explosives with spaced explosive loading structures, each blast hole opening is sealed by stemming, the peripheral holes are uniformly arranged along the arched edge of the cross section of the tunnel to be blasted, the bottom plate holes are uniformly arranged along the bottom edge of the cross section of the tunnel to be blasted, the auxiliary holes comprise first auxiliary holes, second auxiliary holes and third auxiliary holes, the first auxiliary holes are arranged on the inner sides of the peripheral holes, the slot expanding holes comprise first slot expanding holes, second slot expanding holes, third slot expanding holes and fourth slot expanding holes, and the first slot expanding holes are arranged on the inner sides of the first auxiliary holes, the undermining hole, the second slot expanding hole, the third slot expanding hole, the fourth slot expanding hole, the second auxiliary hole and the third auxiliary hole are symmetrically arranged along the vertical center line of the cross section of the tunnel to be blasted, and the undermining hole, the second slot expanding hole, the third slot expanding hole, the fourth slot expanding hole, the second auxiliary hole and the third auxiliary hole are sequentially arranged from inside to outside;
the cutting holes comprise a first cutting hole and a second cutting hole;
the detonation sequence of each blast hole is as follows: the first and second slitting holes are detonated simultaneously, the second reaming hole is detonated, the first and third reaming holes are detonated simultaneously, the fourth reaming hole is detonated, the second auxiliary hole is detonated, the third auxiliary hole is detonated, the first auxiliary hole is detonated, and the peripheral holes and the floor holes are detonated simultaneously;
the explosive of the spaced loading structure comprises a plurality of second explosive sticks, the second explosive sticks are fixedly arranged on second bamboo chips at intervals, the adjacent second explosive sticks are connected through a conducting wire, a second detonator is arranged on the inner side of the innermost second explosive stick, a second detonating tube is connected onto the second detonator, the free end of the second detonating tube extends out of the blasthole, and the second bamboo chips and the blasthole opening are plugged through stemming;
the depth of the cut hole is 4.6-4.84 m; the depth of the second slot expanding hole is 4.53 m; the depth of the third slot expanding hole is 4.3 m; the depth of the fourth slot expanding hole is 4.0 m; the depths of the auxiliary eye, the peripheral eye and the baseplate eye are all 4.0 m;
the explosive with the continuous charging structure comprises a first explosive roll, the first explosive roll is fixedly arranged on a first bamboo chip, a first detonator is arranged on the inner side of the first explosive roll, a first detonating tube is connected to the first detonator, the free end of the first detonating tube extends out of the blasthole, and the opening of the blasthole is plugged by stemming.
2. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: the straight line formed by connecting the central points of the cross sections of the plurality of the cutting holes on each side forms 15 degrees with the vertical direction.
3. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: the first cut hole and the cross section of the tunnel to be blasted are 66 degrees, and the second cut hole and the cross section of the tunnel to be blasted are 60 degrees.
4. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: the cross section of each second slot expanding hole and the cross section of the tunnel to be blasted form 68 degrees; each third slot expanding hole is 78 degrees with the cross section of the tunnel to be blasted.
5. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: each peripheral eye, each auxiliary eye, each baseplate eye, each first slot expanding eye and each fourth slot expanding eye are all perpendicular to the cross section of the tunnel to be blasted.
6. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: the arcs where the section center points of the auxiliary eyes are located, the arcs where the section center points of the peripheral eyes are located and the arcs where the section center points of the first slot expanding eyes are located are parallel to each other.
7. The soft rock single-step deep hole undermining vibration-damping flat-bottom light explosion structure in the tunnel according to claim 1, characterized in that: the stemming plug of the explosive with the continuous charging structure is longer than 30 cm; the stemming plug of the explosive of the spaced loading structure is longer than 100 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212157.XA CN111023927B (en) | 2019-12-02 | 2019-12-02 | Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212157.XA CN111023927B (en) | 2019-12-02 | 2019-12-02 | Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111023927A CN111023927A (en) | 2020-04-17 |
| CN111023927B true CN111023927B (en) | 2022-04-05 |
Family
ID=70203733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911212157.XA Active CN111023927B (en) | 2019-12-02 | 2019-12-02 | Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111023927B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594179B (en) * | 2020-05-06 | 2022-05-13 | 中铁隆工程集团有限公司 | One-step forming construction method for excavation of large-section arch cover of underground excavated station of subway |
| CN112747643A (en) * | 2020-12-29 | 2021-05-04 | 中铁十四局集团建筑工程有限公司 | IV-level surrounding rock blasting method suitable for drilling of three-arm rock drilling jumbo |
| CN113108660A (en) * | 2021-03-05 | 2021-07-13 | 中铁十九局集团华东工程有限公司 | Tunnel contour fine control blasting method under bedding development condition |
| CN114791246A (en) * | 2022-04-02 | 2022-07-26 | 中铁十六局集团路桥工程有限公司 | Blasting construction method for existing small-clear-distance close-connection tunnel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520292A (en) * | 2009-03-12 | 2009-09-02 | 路桥集团国际建设股份有限公司 | Method for excavating and blasting tunnel-type anchorage cavern |
| RU2439485C2 (en) * | 2010-02-10 | 2012-01-10 | АКЦИОНЕРНАЯ КОМПАНИЯ "АЛРОСА" (открытое акционерное общество) | Method to carry out blasting in mines with hazardous oil and gas content |
| CN102914226A (en) * | 2012-11-08 | 2013-02-06 | 中国矿业大学(北京) | Hollow-hole rhombic parallel cut blasting damping method |
| CN104482815A (en) * | 2014-11-28 | 2015-04-01 | 中铁二十三局集团有限公司 | Tunnel smooth blasting method |
| CN107063017A (en) * | 2016-12-24 | 2017-08-18 | 中铁十八局集团有限公司 | It is a kind of to reduce the empty eye mud vibration damping controlled blasting method in the tunnel of vibrations and noise |
| CN107764144A (en) * | 2017-10-17 | 2018-03-06 | 北京住总集团有限责任公司 | A kind of tunnel Millisecond Controlled Blasting method |
| CN109854265A (en) * | 2019-02-26 | 2019-06-07 | 重庆交通建设(集团)有限责任公司 | Three arm rock drilling jumbos stablize construction method and stablize rack |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373840A (en) * | 2018-12-19 | 2019-02-22 | 广西路桥工程集团有限公司 | Tunnel excavation hydraulic pressure demolition construction method |
| CN109855496B (en) * | 2019-03-01 | 2022-01-04 | 中铁十八局集团有限公司 | Comprehensive melon breaking type deep hole cutting blasting method for hard rock in tunnel |
-
2019
- 2019-12-02 CN CN201911212157.XA patent/CN111023927B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520292A (en) * | 2009-03-12 | 2009-09-02 | 路桥集团国际建设股份有限公司 | Method for excavating and blasting tunnel-type anchorage cavern |
| RU2439485C2 (en) * | 2010-02-10 | 2012-01-10 | АКЦИОНЕРНАЯ КОМПАНИЯ "АЛРОСА" (открытое акционерное общество) | Method to carry out blasting in mines with hazardous oil and gas content |
| CN102914226A (en) * | 2012-11-08 | 2013-02-06 | 中国矿业大学(北京) | Hollow-hole rhombic parallel cut blasting damping method |
| CN104482815A (en) * | 2014-11-28 | 2015-04-01 | 中铁二十三局集团有限公司 | Tunnel smooth blasting method |
| CN107063017A (en) * | 2016-12-24 | 2017-08-18 | 中铁十八局集团有限公司 | It is a kind of to reduce the empty eye mud vibration damping controlled blasting method in the tunnel of vibrations and noise |
| CN107764144A (en) * | 2017-10-17 | 2018-03-06 | 北京住总集团有限责任公司 | A kind of tunnel Millisecond Controlled Blasting method |
| CN109854265A (en) * | 2019-02-26 | 2019-06-07 | 重庆交通建设(集团)有限责任公司 | Three arm rock drilling jumbos stablize construction method and stablize rack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111023927A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111023927B (en) | Soft rock single-step deep hole undercutting vibration-reduction flat-bottom light explosion structure in tunnel | |
| CN102878876B (en) | Mine roadway advancing and undermining method and main blasting parameters | |
| CN109839043B (en) | Presplitting blasting damping method | |
| CN205262309U (en) | Compound undercutting blasting structure of big section of medium -length hole | |
| CN103075933A (en) | Large-wedge-shaped multi-repeated cutting groove construction process | |
| CN111059970B (en) | Multistage ultra-deep hole ballast-throwing vibration-control self-stabilizing blasting method for upper step of hard rock in tunnel | |
| CN108007285A (en) | A kind of stone head deep hole sublevel is segmented efficient Cut Blasting method | |
| CN114166082B (en) | Tunnel advanced drilling hole combination accurate control blasting structure and construction process | |
| CN110260735A (en) | A kind of diamond shape major diameter emptying aperture burn cut structure and lane construction technique | |
| CN110196002B (en) | Safe and efficient blasting construction method for vertical shaft wall beam nest | |
| CN112161534A (en) | One-step mining control blasting method for mine underground upward access | |
| CN111102892B (en) | Wedge-shaped cut blast hole arrangement method suitable for blasting excavation of deep-buried tunnel | |
| CN114485304A (en) | Simple light explosion drilling and charging method for medium-hard rock | |
| CN101832743B (en) | Winze top-breaking blasting method | |
| CN110940241B (en) | Tunnel extremely soft rock deep hole cut peripheral hole isolation air column charging buffering blasting method | |
| CN211824100U (en) | Detonator detonation system for mixed use of detonators and detonator arrangement system for tunnel blasting | |
| CN111521081A (en) | Construction method for reducing explosion-control over-underproduction blasthole of inclined flat-curve tunnel | |
| CN104790950A (en) | Optimized mining middle-deep blasthole millisecond blasting slot cutting method | |
| CN112595192B (en) | Variable-diameter cut structure and method for roadway excavation | |
| CN113898345A (en) | Underground metal mine stage mining deep hole cutting groove-drawing method | |
| CN111578802A (en) | High-acquisition-degree mine smooth blasting mining method | |
| CN220552364U (en) | Rock roadway similar slitting structure | |
| CN113865454B (en) | Mixed detonation method for tunnel cut holes | |
| CN219977242U (en) | Arrangement structure of cutting well blast holes | |
| CN116045756A (en) | Rock roadway similar slitting efficient blasting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200407 Address after: 300350 Tianjin city Jinnan District double Township Applicant after: CHINA RAILWAY 18 BUREAU GROUP Co.,Ltd. Address before: 410100 No. 88 East 7 Line, Changsha Economic and Technological Development Zone, Hunan Province Applicant before: China Railway Construction Heavy Industry Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |