CN112229283B - Hole distribution blasting method for tunnel center groove - Google Patents
Hole distribution blasting method for tunnel center groove Download PDFInfo
- Publication number
- CN112229283B CN112229283B CN202010996929.XA CN202010996929A CN112229283B CN 112229283 B CN112229283 B CN 112229283B CN 202010996929 A CN202010996929 A CN 202010996929A CN 112229283 B CN112229283 B CN 112229283B
- Authority
- CN
- China
- Prior art keywords
- hole
- explosive
- horizontal hole
- tunnel
- lower horizontal
- 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
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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a hole distribution blasting method for a tunnel center groove, which comprises the following steps that S1 surrounds a plurality of vertical holes distributed on the inner side of an excavation outline of the tunnel center groove, an upper horizontal hole and a lower horizontal hole are built in the tunnel center groove along the excavation axis direction, and the upper horizontal hole is positioned above the lower horizontal hole; s2, loading explosive at the bottom of the vertical hole, and loading explosive to the upper horizontal hole and the lower horizontal hole in a uncoupled loading mode; s3, detonating the explosive in the upper horizontal hole, detonating the explosive in the lower horizontal hole, and detonating all the explosive in the vertical hole. The invention has the beneficial effects that: based on the blasting funnel principle, the smoothness of the tunnel center groove excavation contour line is ensured, the ultra-underexcavation is controlled, meanwhile, the specific explosive consumption is reduced, the construction cost is saved, the disturbance to the tunnel bottom plate is reduced, and the construction quality and safety are ensured.
Description
Technical Field
The invention relates to the technical field of tunnel center groove construction, in particular to a tunnel center groove hole distribution blasting method.
Background
The railway and highway tunnel is designed with the central groove for longitudinal drainage to meet the requirements of groundwater drainage and operation safety, the central groove is generally deeper and narrower due to the drainage requirement and the tunnel space limitation, the excavation forming quality is not easy to control, and the excavation is required to be carried out independently. In order to solve the problem of poor blasting excavation effect of the central ditch of the tunnel, a reasonable tunnel central ditch hole distribution blasting method is necessary to be found.
Disclosure of Invention
In view of this, in order to overcome the defects of the existing tunnel center trench excavation technology, the embodiment of the invention provides a tunnel center trench hole distribution blasting method.
The embodiment of the invention provides a tunnel center groove hole distribution blasting method, which comprises the following steps:
s1, surrounding a plurality of vertical holes distributed on the inner side of an excavation outline of a tunnel center groove, and establishing an upper horizontal hole and a lower horizontal hole in the tunnel center groove along the excavation axis direction, wherein the upper horizontal hole is positioned above the lower horizontal hole;
s2, loading explosive at the bottom of the vertical hole, and loading explosive to the upper horizontal hole and the lower horizontal hole in a uncoupled loading mode;
s3, detonating the explosive in the upper horizontal hole, detonating the explosive in the lower horizontal hole, and detonating all the explosive in the vertical hole.
Further, in the step S2, 50-80 g of explosive is filled at the bottom of the vertical hole; filling 1-2 volumes of explosive at the bottom of the upper horizontal hole, and filling 1 volume of explosive from the bottom of the hole to the hole at intervals of 50-70 cm; 2-3 volumes of explosive are filled at the bottom of the lower horizontal hole, and 1 volume of explosive is filled from the bottom of the hole to the hole at intervals of 50-70 cm.
Further, 5 to 7 volumes of explosive are filled in total in the upper horizontal hole, and 7 to 9 volumes of explosive are filled in total in the lower horizontal hole.
Further, the explosive in the vertical hole, the upper horizontal hole and the lower horizontal hole are rock emulsion explosive.
Further, the distance between each vertical hole and the trench excavation contour line on the outer side of the vertical hole is 10 cm-20 cm, the distance between the adjacent vertical holes 1 is 40 cm-50 cm, and the hole depth is 1.2 m-1.4 m; the distance from the upper horizontal hole to the free surface of the central groove of the tunnel is 50 cm-60 cm, and the hole depth is 3.5 m-5.0 m; the distance from the lower horizontal hole to the bottom of the tunnel center groove is 10 cm-20 cm, and the hole depth is 3.5 m-5.0 m.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the tunnel center groove hole distribution blasting method provided by the invention is based on the blasting funnel principle, combines a numerical simulation result with field application discovery, and compared with the pre-splitting blasting technology commonly adopted in tunnel center groove excavation, the tunnel center groove hole distribution blasting method provided by the invention can ensure the smoothness of the tunnel center groove excavation contour line, control the ultra-underexcavation, reduce the specific explosive consumption, save the construction cost, reduce the disturbance to the tunnel bottom plate and ensure the construction quality and safety.
Drawings
FIG. 1 is a schematic diagram of the placement of blastholes in a method for blasting a central trench of a tunnel;
fig. 2 is a schematic view of a free surface of a tunnel in a hole distribution blasting method for a central trench of the tunnel according to the present invention.
Fig. 3 is an internal schematic view of the vertical hole 1 in fig. 1;
fig. 4 is an internal schematic view of the upper horizontal hole 2 and the lower horizontal hole 3 in fig. 1.
In the figure: 1-vertical holes, 2-upper horizontal holes, 3-lower horizontal holes and 4-electric detonators; 5-explosive; 6-detonating cord and 7-groove excavation contour lines.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides a hole distribution blasting method for a central trench of a tunnel, including the following steps:
s1, a plurality of vertical holes 1 are distributed around the inner side of an excavation outline 7 of a tunnel center groove, an upper horizontal hole 2 and a lower horizontal hole 3 are established in the tunnel center groove along the excavation axis direction, and the upper horizontal hole 2 is positioned above the lower horizontal hole 3;
specifically, the distance between each vertical hole 1 and the trench excavation contour line 7 on the outer side of the vertical hole 1 is 10 cm-20 cm, the hole pitch between every two adjacent vertical holes 1 is L, wherein L is 40 cm-50 cm, and the hole depth is 1.2 m-1.4 m; the distance from the upper horizontal hole 2 to the free surface of the central groove of the tunnel is a, wherein a is 50 cm-60 cm, and the hole depth is 3.5 m-5.0 m; the distance from the lower horizontal hole 3 to the bottom of the central groove of the tunnel is b, wherein b is 10 cm-20 cm, and the hole depth is 3.5 m-5.0 m.
S2, loading explosive at the bottom of the vertical hole 1, and loading explosive to the upper horizontal hole 2 and the lower horizontal hole 3 in a uncoupled loading manner;
referring to fig. 3 and 4, a small amount of explosive 5, typically 50-80 g, is filled in the bottom of the vertical hole 1, 1-2 volumes of explosive are filled in the bottom of the upper horizontal hole 2, 1 volume of explosive is filled from the bottom of the hole to the hole at intervals of 50-70 cm, and a total of 5-7 volumes of explosive 5 are filled in the upper horizontal hole 2, typically according to the length of the upper horizontal hole 2. 2-3 volumes of explosive are filled at the bottom of the lower horizontal hole 3, 1 volume of explosive is filled from the bottom of the hole to the hole opening at intervals of 50-70 cm, and 7-9 volumes of explosive are filled in total in the lower horizontal hole 3 according to the length of the lower horizontal hole 3. The explosive 5 in the vertical hole 1, the upper horizontal hole 2 and the lower horizontal hole 3 are rock emulsion explosive, and are provided with detonators 4 and detonators for detonating the detonators 4.
S3, detonating the explosive in the upper horizontal hole 2, detonating the explosive in the lower horizontal hole 3, and detonating the explosive in all the vertical holes 1.
Based on the blasting funnel principle, the upper horizontal hole 2 is detonated at first, rock above the middle part of the trench is broken through strengthening loosening blasting effect, then the lower horizontal hole 3 is detonated, rock at the bottom of the trench is further broken, and finally all the vertical holes 1 are detonated, so that the rock near the trench excavation contour line 7 is fully broken and thrown, and the tunnel center trench excavation contour line 7 is formed and flattened.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the protection sought herein.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. A tunnel center groove hole distribution blasting method is characterized in that: comprises the steps of,
s1, surrounding a plurality of vertical holes distributed on the inner side of a tunnel center groove excavation contour line, and establishing an upper horizontal hole and a lower horizontal hole in the tunnel center groove along the excavation axis direction, wherein the upper horizontal hole is positioned above the lower horizontal hole, the distance between each vertical hole and the groove excavation contour line on the outer side of the vertical hole is 10 cm-20 cm, the distance between the 1 hole opening of each adjacent vertical hole is 40 cm-50 cm, and the hole depth is 1.2 m-1.4 m; the distance from the upper horizontal hole to the free surface of the central groove of the tunnel is 50 cm-60 cm, and the hole depth is 3.5 m-5.0 m; the distance from the lower horizontal hole to the bottom of the tunnel center groove is 10 cm-20 cm, and the hole depth is 3.5 m-5.0 m;
s2, loading explosive at the bottom of the vertical hole, and loading explosive to the upper horizontal hole and the lower horizontal hole in a uncoupled loading mode;
s3, detonating the explosive in the upper horizontal hole, detonating the explosive in the lower horizontal hole, and detonating all the explosive in the vertical hole.
2. A tunnel centre trench hole blasting method as claimed in claim 1, wherein: in the step S2, 50-80 g of explosive is filled at the bottom of the vertical hole; filling 1-2 volumes of explosive at the bottom of the upper horizontal hole, and filling 1 volume of explosive from the bottom of the hole to the hole at intervals of 50-70 cm; 2-3 volumes of explosive are filled at the bottom of the lower horizontal hole, and 1 volume of explosive is filled from the bottom of the hole to the hole at intervals of 50-70 cm.
3. A tunnel centre trench hole blasting method as claimed in claim 2, wherein: and 5-7 volumes of explosive are filled in the upper horizontal hole in total, and 7-9 volumes of explosive are filled in the lower horizontal hole in total.
4. A tunnel centre trench hole blasting method as claimed in claim 2, wherein: the explosive in the vertical hole, the upper horizontal hole and the lower horizontal hole is rock emulsion explosive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996929.XA CN112229283B (en) | 2020-09-21 | 2020-09-21 | Hole distribution blasting method for tunnel center groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996929.XA CN112229283B (en) | 2020-09-21 | 2020-09-21 | Hole distribution blasting method for tunnel center groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112229283A CN112229283A (en) | 2021-01-15 |
| CN112229283B true CN112229283B (en) | 2023-05-05 |
Family
ID=74107289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010996929.XA Active CN112229283B (en) | 2020-09-21 | 2020-09-21 | Hole distribution blasting method for tunnel center groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112229283B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001608A (en) * | 2021-10-20 | 2022-02-01 | 中铁三局集团第二工程有限公司 | Central ditch blasting excavation method for tunnel without inverted arch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294274A (en) * | 1993-04-09 | 1994-10-21 | Kajima Corp | Method for excavating vertical shaft by preboring |
| CN103983147A (en) * | 2014-04-18 | 2014-08-13 | 同济大学 | Permafrost region road tunnel peripheral hole blasting construction method |
| CN107843156A (en) * | 2016-09-20 | 2018-03-27 | 南京梅山冶金发展有限公司 | Gallery（Tunnel）The method of driving enhancing Cut Blasting efficiency |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX339889B (en) * | 2010-02-22 | 2016-06-16 | Tech Resources Pty Ltd * | Underground mining. |
-
2020
- 2020-09-21 CN CN202010996929.XA patent/CN112229283B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06294274A (en) * | 1993-04-09 | 1994-10-21 | Kajima Corp | Method for excavating vertical shaft by preboring |
| CN103983147A (en) * | 2014-04-18 | 2014-08-13 | 同济大学 | Permafrost region road tunnel peripheral hole blasting construction method |
| CN107843156A (en) * | 2016-09-20 | 2018-03-27 | 南京梅山冶金发展有限公司 | Gallery（Tunnel）The method of driving enhancing Cut Blasting efficiency |
Non-Patent Citations (1)
| Title |
|---|
| 大坝建基面水平预裂***技术应用;王词重等;《水利水电施工》;20141215(第06期);第1-3页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112229283A (en) | 2021-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110132084B (en) | Tunnel over-under-excavation control method | |
| CN111912307B (en) | Blasting excavation method for V-level surrounding rock large-section granite tunnel | |
| CN106767212B (en) | A kind of two-region undercut blast hole arrangement and its explosion well completion method of application | |
| CN110307002B (en) | Refined construction method for II-grade and III-grade surrounding rock ultra-small clear distance tunnel | |
| CN108007285A (en) | A kind of stone head deep hole sublevel is segmented efficient Cut Blasting method | |
| CN112229283B (en) | Hole distribution blasting method for tunnel center groove | |
| CN109141149A (en) | A kind of tunnel excavation hydraulic pressure demolition construction method | |
| CN109900174A (en) | Quick bursting kerve method suitable for different heights of lift | |
| CN103726858A (en) | Underground large-scale cave depot project sphere-cylinder combination excavation method | |
| CN107989617A (en) | A kind of strip mining transformation method of gently inclined orebody | |
| CN108915694A (en) | It the step tunneling boring unprotect layer tight-face blasting of tunnel lower layer and repairs the roads and protects logical construction method | |
| CN207095427U (en) | Bilateral wedge cut distribution structure of extra-large section tunnel | |
| CN113686215B (en) | Rock roadway large-diameter double-hole charging accurate time-delay hole-by-hole vertical cut blasting method | |
| CN108151595A (en) | The disposable well completion method of VCR methods | |
| CN110230959B (en) | Rock cutting slope controlled blasting 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 | |
| CN210570271U (en) | Cut hole structure for tunnel blasting tunneling engineering | |
| CN111220036A (en) | Blasting method for pilot tunnel at lower section of vertical shaft water curtain roadway | |
| CN113865454B (en) | Mixed detonation method for tunnel cut holes | |
| CN109944591A (en) | A kind of Longhole Mining method of small-sized corner mine | |
| CN110207555A (en) | A kind of weak intercalated layer geology Slope Controlled Blasting method | |
| CN111102893A (en) | Conical energy regulating and controlling device and curved surface foundation vertical hole blasting excavation method based on same | |
| CN110530220A (en) | A kind of blasting technology for reservoir dam | |
| CN221037126U (en) | Surrounding rock burst hole structure of tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |