CN111043923A - Blasting method suitable for adjacent important buildings - Google Patents
Blasting method suitable for adjacent important buildings Download PDFInfo
- Publication number
- CN111043923A CN111043923A CN201911258992.7A CN201911258992A CN111043923A CN 111043923 A CN111043923 A CN 111043923A CN 201911258992 A CN201911258992 A CN 201911258992A CN 111043923 A CN111043923 A CN 111043923A
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- China
- Prior art keywords
- blasting
- adjacent
- line
- foundation pit
- area
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- 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.)
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Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
Abstract
The invention discloses a blasting method suitable for an adjacent important building, which comprises the following steps: 1) arranging a plurality of blasting lines in a blasting area of the foundation pit, wherein each blasting line comprises a blast hole and a blasting network; 2) drilling a plurality of damping holes at the boundary of a blasting area of a foundation pit, and arranging a protective device on a blasting line; 3) and blasting each blasting line one by one along the free face of the blasting area of the foundation pit. The method for blasting and excavating the foundation pit can avoid the influence of blasting flying stones and vibration speed on the surrounding environment in the blasting process, and improve the safety of blasting construction.
Description
Technical Field
The invention relates to the technical field of blasting engineering construction, in particular to a blasting method suitable for an adjacent important building.
Background
Blasting excavation is an important means for excavating rock foundation pits. Blasting excavation is to use detonators to detonate explosives in a rock body to be blasted to achieve the purpose of breaking the rock, but blasting flying stones and vibration speed in the blasting process easily have great influence on the surrounding environment, and blasting safety is difficult to guarantee under the condition that the surrounding environment is complex.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a blasting method suitable for an adjacent important building, which is used for blasting and excavating a foundation pit, so that the influence of blasting flying stones and vibration speed on the surrounding environment in the blasting process can be avoided, and the safety of blasting construction is improved.
The invention is realized by the following technical scheme:
a method of blasting an adjacent critical structure comprising the steps of:
1) arranging a plurality of blasting lines in a blasting area of the foundation pit, wherein each blasting line comprises a blast hole and a blasting network;
2) drilling a plurality of damping holes at the boundary of a blasting area of a foundation pit, and arranging a protective device on a blasting line;
3) and blasting each blasting line one by one along the free face of the blasting area of the foundation pit.
In the invention, the blast hole is used for installing explosives, the detonating network is used for detonating the connection of detonators, and the vibration damping hole is used for reducing the propagation strength of blasting vibration; the protection device is used for avoiding blasting flying stones in the blasting process to influence the environment, and the safety of blasting construction is improved.
In the step 1), a plurality of blast holes are drilled on the blasting line path, adjacent blast holes are connected through a detonating network, and the blasting line path is in a U shape facing to the free face of the blasting area of the foundation pit.
Further, the blast hole is filled with explosive, and the detonating network is a detonator.
Furthermore, among the plurality of blasting lines, the blasting line close to the free face of the blasting area of the foundation pit is a straight line parallel to the free face, and the rest blasting lines comprise straight lines parallel to the free face and oblique lines which are connected at two ends of the straight lines and form a certain included angle with the straight lines, wherein the oblique lines face to one side of the free face.
According to the invention, the blasting mode is that each blasting line is blasted one by one along the free face of the blasting area of the foundation pit, and the path of the blasting line is in a U shape facing the free face of the blasting area of the foundation pit, so that after blast holes on a single blasting line are blasted, a new free face formed is also in a U shape, and the crushed stone is convenient to clean.
Furthermore, the distance between two adjacent straight lines is 2800mm, the distance between blast holes on a single blasting line is 2500mm, the diameter of each blast hole is 90mm, and the depth of each blast hole is 10500 mm.
Further, in the step 2), the diameter of the vibration damping hole is 90mm, the depth is 11000mm, and the distance is 500 mm.
Further, in step 2), protector includes big gun quilt, rubber tape and the loess in bags, and big gun quilt covers in whole blasting line top, then covers the rubber tape on big gun quilt to compress tightly the rubber tape with the loess in bags.
Further, in the step 3), firstly blasting the blasting lines close to the adjacent empty surface to form a new adjacent empty surface, and then blasting the blasting lines close to the new adjacent empty surface, so that each blasting line is blasted one by one along the adjacent empty surface of the foundation pit blasting area.
The invention is used for rock blasting under complex environment, when in use, blast holes and vibration damping holes are drilled on a rock body to be blasted, then the blast holes are cleaned by high-pressure air, explosive installation and initiation network connection are carried out, single initiation explosive quantity is controlled through single-hole explosive quantity and initiation network, the vibration damping effect is achieved, finally, the orifice of the blast hole is blocked by yellow mud, the orifice of the blast hole is covered by a sand bag covered on a gun cover and a rubber belt, flyrock is controlled, blasting is carried out after warning and evacuating the periphery, so that the blasting excavation vibration speed and the flyrock are effectively controlled, and the influence of blasting excavation on the surrounding environment is reduced.
Further, the explosive is filled at the middle lower part of the inner cavity of the blast hole, the detonating body is embedded in the explosive, the top of the detonating body is connected with the detonating tube, the top end of the detonating tube is arranged outside the blast hole, and the filler is filled in the gap between the detonating tube and the blast hole.
Further, the explosive is emulsion explosive, the priming body is a detonator, and the filling body is yellow mud.
According to the invention, the initiation body is used for initiating the explosive in the inner cavity of the blast hole, and the yellow mud filled in the gap between the detonating tube and the blast hole is used for plugging the blast hole, so that the explosive is prevented from being sprayed out from the orifice during explosion to influence the explosion effect.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention relates to a blasting method suitable for an adjacent important building, wherein a blast hole is used for installing explosives, a detonating network is used for connecting detonators, and a vibration damping hole is used for reducing the propagation strength of blasting vibration; the protection device is used for avoiding the influence of blasting flyrock on the environment in the blasting process and improving the safety of blasting construction;
2. the invention relates to a blasting method suitable for an adjacent important building, wherein the blasting mode is that each blasting line is blasted one by one along the free face of a foundation pit blasting area, and the blasting line path is in a U shape facing the free face of the foundation pit blasting area, so that a new free face formed after blast holes on a single blasting line are blasted is also in a U shape, and the crushed stone is convenient to clean;
3. the invention relates to a blasting method suitable for an adjacent important building, which is used for rock blasting in a complex environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a flat layout of the blast line of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 taken perpendicular to the blank surface in accordance with the present invention;
FIG. 3 is a cross-sectional view of FIG. 1 taken parallel to the clinical void;
FIG. 4 is a layout view of the shielding device of the present invention;
fig. 5 is a schematic view of a blast hole of the present invention.
Reference numbers and corresponding part names in the drawings:
1-blasting line, 2-blast hole, 21-explosive, 22-detonating body, 23-detonating tube, 24-filling body, 3-detonating network, 4-foundation pit blasting area, 5-damping hole, 6-protective device, 61-blasting quilt, 62-rubber band and 63-bagged loess.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1 to 3, a blasting method of the present invention for an adjacent important building includes the steps of:
1) a plurality of blasting lines 1 are arranged in a foundation pit blasting area 4, and each blasting line 1 comprises a blast hole 2 and a blasting network 3;
2) drilling a plurality of damping holes 5 at the boundary of a foundation pit blasting area 4, and arranging a protective device 6 on a blasting line 1;
3) and blasting the blasting lines 1 one by one along the blank surface of the foundation pit blasting area 4.
In the step 1), a plurality of blast holes 2 are drilled in the path of the blasting line 1, the adjacent blast holes 2 are connected through a detonating network 3, and the path of the blasting line 1 is in a U shape facing to the free surface of a foundation pit blasting area 4.
Example 2
As shown in fig. 1 to 4, a blasting method of the present invention for an adjacent important building includes the steps of:
1) a plurality of blasting lines 1 are arranged in a foundation pit blasting area 4, and each blasting line 1 comprises a blast hole 2 and a blasting network 3;
2) drilling a plurality of damping holes 5 at the boundary of a foundation pit blasting area 4, and arranging a protective device 6 on a blasting line 1;
3) and blasting the blasting lines 1 one by one along the blank surface of the foundation pit blasting area 4.
In the step 1), a plurality of blast holes 2 are drilled in the path of the blasting line 1, the adjacent blast holes 2 are connected through a detonating network 3, and the path of the blasting line 1 is in a U shape facing to the free surface of a foundation pit blasting area 4.
Further, the blast hole 2 is filled with explosive 21, and the priming network 3 is a detonator.
Furthermore, among the plurality of blasting lines 1, the blasting line 1 close to the free face of the foundation pit blasting area 4 is a straight line parallel to the free face, and the rest of blasting lines 1 comprise straight lines parallel to the free face and oblique lines which are connected to two ends of the straight lines and form a certain included angle with the straight lines, wherein the oblique lines face one side of the free face.
Further, the distance between two adjacent straight lines is 2800mm, the distance between blast holes 2 on the single blasting line 1 is 2500mm, the diameter of each blast hole 2 is 90mm, and the depth of each blast hole 2 is 10500 mm.
Further, in the step 2), the diameter of the vibration reduction holes 5 is 90mm, the depth is 11000mm, and the distance is 500 mm.
Further, in step 2), the protection device 6 comprises a quilt 61, a rubber belt 62 and bagged loess 63, wherein the quilt 61 covers the whole blasting line 1, then the rubber belt 62 covers the quilt 61, and the rubber belt 62 is compressed by the bagged loess 63.
Example 3
As shown in fig. 1 to 5, a blasting method of the present invention for an adjacent important building includes the steps of:
1) a plurality of blasting lines 1 are arranged in a foundation pit blasting area 4, and each blasting line 1 comprises a blast hole 2 and a blasting network 3;
2) drilling a plurality of damping holes 5 at the boundary of a foundation pit blasting area 4, and arranging a protective device 6 on a blasting line 1;
3) and blasting the blasting lines 1 one by one along the blank surface of the foundation pit blasting area 4.
In the step 1), a plurality of blast holes 2 are drilled in the path of the blasting line 1, the adjacent blast holes 2 are connected through a detonating network 3, and the path of the blasting line 1 is in a U shape facing to the free surface of a foundation pit blasting area 4.
Further, the blast hole 2 is filled with explosive 21, and the priming network 3 is a detonator.
Furthermore, among the plurality of blasting lines 1, the blasting line 1 close to the free face of the foundation pit blasting area 4 is a straight line parallel to the free face, and the rest of blasting lines 1 comprise straight lines parallel to the free face and oblique lines which are connected to two ends of the straight lines and form a certain included angle with the straight lines, wherein the oblique lines face one side of the free face.
Further, the distance between two adjacent straight lines is 2800mm, the distance between blast holes 2 on the single blasting line 1 is 2500mm, the diameter of each blast hole 2 is 90mm, and the depth of each blast hole 2 is 10500 mm.
Further, in the step 2), the diameter of the vibration reduction holes 5 is 90mm, the depth is 11000mm, and the distance is 500 mm.
Further, in step 2), the protection device 6 comprises a quilt 61, a rubber belt 62 and bagged loess 63, wherein the quilt 61 covers the whole blasting line 1, then the rubber belt 62 covers the quilt 61, and the rubber belt 62 is compressed by the bagged loess 63.
Further, in the step 3), firstly blasting the blasting line 1 close to the blank face to form a new blank face, and then blasting the blasting line 1 close to the new blank face, so that each blasting line 1 is blasted one by one along the blank face of the foundation pit blasting area 4.
Further, the explosive 21 is filled in the middle lower part of the inner cavity of the blast hole 2, the detonating body 22 is embedded in the explosive 21, the top of the detonating body 22 is connected with the detonating tube 23, the top end of the detonating tube 23 is arranged outside the blast hole 2, and the filler 24 is filled in the gap between the detonating tube 23 and the blast hole 2.
Further, the explosive 21 is an emulsion explosive 21, the priming body 22 is a detonator, and the filling body 24 is yellow mud.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of blasting an adjacent critical structure, comprising the steps of:
1) arranging a plurality of blasting lines in a blasting area of the foundation pit, wherein each blasting line comprises a blast hole and a blasting network;
2) drilling a plurality of damping holes at the boundary of a blasting area of a foundation pit, and arranging a protective device on a blasting line;
3) and blasting each blasting line one by one along the free face of the blasting area of the foundation pit.
2. A blasting method suitable for adjacent important buildings according to claim 1, wherein in the step 1), a plurality of blast holes are drilled in the blasting line path, adjacent blast holes are connected through a blasting network, and the blasting line path is in a U shape facing to a free face of a blasting area of the foundation pit.
3. A method of blasting adjacent a critical building according to claim 1, wherein the blasthole is filled with explosives and the blasting network is a detonator.
4. A blasting method suitable for being used near important buildings according to claim 2, wherein the blasting line close to the free surface of the blasting area of the foundation pit in the plurality of blasting lines is a straight line parallel to the free surface, and the rest of the blasting lines comprise a straight line parallel to the free surface and oblique lines which are connected with the two ends of the straight line and form a certain included angle with the straight line, and the oblique lines face one side of the free surface.
5. A method of blasting adjacent a critical structure according to claim 4, wherein the distance between two adjacent lines is 2800mm, the distance between blastholes on a single blast line is 2500mm, and the blastholes have a diameter of 90mm and a depth of 10500 mm.
6. A method of blasting adjacent critical buildings according to claim 1, wherein in step 2) the damping holes are 90mm in diameter, 11000mm deep and 500mm spaced.
7. A blasting method applied to an adjacent important building according to claim 1, wherein in the step 2), the protecting means comprises a quilt, a rubber band and bagged loess, the quilt is covered above the whole blasting line, then the rubber band is covered on the quilt, and the rubber band is compacted by the bagged loess.
8. A blasting method applied to an adjacent important building according to claim 1, wherein in the step 3), the blasting line close to the adjacent vacancy surface is firstly blasted to form a new adjacent vacancy surface, and then the blasting line close to the new adjacent vacancy surface is blasted, in this way, each blasting line is blasted one by one along the adjacent vacancy surface of the blasting area of the foundation pit.
9. A blasting method suitable for being used near important buildings according to claim 3, wherein the explosives are filled in the middle lower part of the inner cavity of the blast hole, the detonating body is embedded in the explosives, the top of the detonating body is connected with the detonating tube, the top end of the detonating tube is arranged outside the blast hole, and the gap between the detonating tube and the blast hole is filled with the filling body.
10. A method of blasting an adjacent critical structure according to claim 9, wherein the explosive is an emulsion explosive, the initiation body is a detonator and the filler body is yellow mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911258992.7A CN111043923A (en) | 2019-12-10 | 2019-12-10 | Blasting method suitable for adjacent important buildings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911258992.7A CN111043923A (en) | 2019-12-10 | 2019-12-10 | Blasting method suitable for adjacent important buildings |
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| Publication Number | Publication Date |
|---|---|
| CN111043923A true CN111043923A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911258992.7A Pending CN111043923A (en) | 2019-12-10 | 2019-12-10 | Blasting method suitable for adjacent important buildings |
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| CN (1) | CN111043923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254593A (en) * | 2020-10-19 | 2021-01-22 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112627185A (en) * | 2020-12-18 | 2021-04-09 | 湖北省路桥集团有限公司 | Deep cutting and controlled blasting excavation construction method thereof |
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| US20010025583A1 (en) * | 1999-12-31 | 2001-10-04 | Shim Dong Soo | Center-cut blasting method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split |
| CN106595410A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Deep foundation pit earth pressure controlled blasting method |
| CN107339921A (en) * | 2017-07-11 | 2017-11-10 | 中交隧道工程局有限公司 | A kind of subway foundation pit blasting method |
| CN107391841A (en) * | 2017-08-03 | 2017-11-24 | 中铁十局集团第五工程有限公司 | Close on the safe construction method in the newly-built left and right tunnel in existing disease tunnel |
| CN109029167A (en) * | 2018-08-14 | 2018-12-18 | 中铁十二局集团有限公司 | Foundation pit V-type Cut Blasting method |
| CN110284505A (en) * | 2019-04-29 | 2019-09-27 | 中国建筑第二工程局有限公司 | The construction method of massif foundation pit |
-
2019
- 2019-12-10 CN CN201911258992.7A patent/CN111043923A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010025583A1 (en) * | 1999-12-31 | 2001-10-04 | Shim Dong Soo | Center-cut blasting method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split |
| CN106595410A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Deep foundation pit earth pressure controlled blasting method |
| CN107339921A (en) * | 2017-07-11 | 2017-11-10 | 中交隧道工程局有限公司 | A kind of subway foundation pit blasting method |
| CN107391841A (en) * | 2017-08-03 | 2017-11-24 | 中铁十局集团第五工程有限公司 | Close on the safe construction method in the newly-built left and right tunnel in existing disease tunnel |
| CN109029167A (en) * | 2018-08-14 | 2018-12-18 | 中铁十二局集团有限公司 | Foundation pit V-type Cut Blasting method |
| CN110284505A (en) * | 2019-04-29 | 2019-09-27 | 中国建筑第二工程局有限公司 | The construction method of massif foundation pit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254593A (en) * | 2020-10-19 | 2021-01-22 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112254593B (en) * | 2020-10-19 | 2023-02-03 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112627185A (en) * | 2020-12-18 | 2021-04-09 | 湖北省路桥集团有限公司 | Deep cutting and controlled blasting excavation construction method thereof |
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Application publication date: 20200421 |