CN113218264A - Safe construction method for water transport engineering network - Google Patents
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- CN113218264A CN113218264A CN202110613668.3A CN202110613668A CN113218264A CN 113218264 A CN113218264 A CN 113218264A CN 202110613668 A CN202110613668 A CN 202110613668A CN 113218264 A CN113218264 A CN 113218264A
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- 238000010276 construction Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000004642 transportation engineering Methods 0.000 title claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 60
- 238000005422 blasting Methods 0.000 claims abstract description 44
- 239000002360 explosive Substances 0.000 claims abstract description 41
- 238000005553 drilling Methods 0.000 claims abstract description 35
- 238000005474 detonation Methods 0.000 claims abstract description 25
- 238000013461 design Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000000977 initiatory effect Effects 0.000 claims description 16
- 238000010304 firing Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 5
- 238000004880 explosion Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000010415 tidying Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000008520 organization Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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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
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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
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
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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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- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A safe construction method for a water transport engineering network comprises the following steps: (1) construction design; (2) calculating the length of the protective rope; (3) measuring and positioning; (4) drilling underwater; (5) mounting the explosive columns; (6) laying a security protection detonation network; (7) and checking the security detonation network. The invention can improve the safety and reliability of the detonating network, and avoid the phenomena of blind blasting, invalid blasting operation and the like caused by the fact that the detonating tube and the detonating cable are broken and damaged due to rapid stream impact. The method is suitable for underwater drilling and blasting construction in the torrent area in inland river port channel construction, water conservancy and hydropower construction and coastal port channel construction projects.
Description
Technical Field
The invention relates to a construction method of an underwater safe priming circuit in a water transport construction project, in particular to a safe construction method of a water transport project circuit.
Background
When blasting construction is carried out in the area where water flow is turbulent, because the water flow speed is fast, the water flow is impacted by turbulent water flow, the detonating tube and the detonating cable are broken and damaged frequently, the detonation is influenced, under the condition, explosive blind blasting and invalid blasting operation are easily caused, and a series of safety problems can be generated.
Disclosure of Invention
The invention aims to provide a network security construction method for a water transport project for the water transport project. The blasting network is characterized in that a blasting fuse in the blasting network penetrates through a protective tube and extends out of a blast hole, so that the blasting fuse is prevented from being damaged by water flow action or friction with rock debris at an orifice; the detonating tube and the detonating cable are loosely wound on the protective rope, the protective rope is tensioned and stressed, and the detonating tube and the detonating cable are not stressed, so that the detonating tube and the detonating cable are prevented from being damaged or broken by water flow impact to influence detonation propagation to form a blind gun. The method can eliminate the problem that the blasting network is damaged by the torrent impact, improve the safety of blasting operation, ensure the construction progress and improve the construction efficiency.
The invention realizes the aim through the following technical scheme: a safe construction method for a water transport engineering network comprises the following steps:
(1) design of construction
Drawing a construction design drawing according to the hydrological and geological conditions of a construction area and by combining the engineering practice, and carrying out safe blasting network design;
(2) calculating the length of the protective rope
In order to avoid the damage of a detonating tube and a detonating cable in the blasting network caused by the impact of the rapid stream, the length of a protection rope which keeps safety under the condition of the rapid stream is designed to ensure that the blasting network is not damaged, and the length of the protection rope is calculated according to the following formula:
in the formula: l- - -protective rope length; h1-the distance of the deck of the rig vessel to the water surface; h2-the distance of the rock face to the water surface; l is1-distance of the rig vessel from the blast hole; l is2-shot hole depth; pi- - -circumferential ratio; k- -Water flow parameters: 1.5-5,
(3) measuring and positioning
Establishing a control point network by using GPS-RTK measurement according to a water transport engineering measurement specification, erecting a mobile station on a construction ship by erecting a reference station, displaying ship direction, a real-time position of a drilling machine and a designed drilling hole position by using measurement software, and checking that the reef explosion ship is consistent with the designed hole position;
(4) underwater drilling
1) Drilling arrangement: arranging blast holes according to the hole pitch and the row pitch required by design, and designing a hole arrangement mode;
2) drilling: after the driller ship measures and positions, a large-aperture down-the-hole driller with the diameter of phi 100mm is used for vertically drilling holes on the designed hole sites;
(5) mounting explosive column
And determining parameters such as blast hole loading amount, loading length, blocked segment length, protective tube length and the like while drilling. Processing and binding a powder column according to design requirements, binding a protection rope on the powder column, winding a detonating tube on the protection rope, lifting the powder column when the protection rope is used for reinforcing the powder column and charging so as to prevent the detonating tube from being pulled apart, pulling the protection rope and straightening the detonating tube when charging, slowly putting the powder column according to the design requirements into a blast hole through a sleeve, preventing the detonating tube from being damaged and broken when the powder column slides downwards, and ensuring that the powder column is installed to the bottom;
(6) laying security protection detonation network
And (3) completing charging of each blast hole, laying a security protection initiation network, installing the bound explosive columns into each blast hole, installing different sections of plastic detonating tube detonators as initiation detonators in each blast hole, and externally using different sections of plastic detonating tube detonators as booster detonators in the blast holes. A protective pipe extending out of the blast hole is installed from the top of the explosive column, the detonating tube in the hole is wound on the protective rope and extends out of the hole by penetrating through the protective pipe so as to prevent the detonating tube from being broken by the impact of a rapid stream or broken by broken stones, the detonating tube positioned outside the hole is firmly connected with a booster detonator, and the connection part of the detonating tube and the booster detonator is loosely bound on the protective rope; the other end of the booster detonator is connected with a detonating cable, the detonating cable is wound on a protective rope, the protective rope is stressed, the detonating cable is not stressed, a safe detonating line is formed, and the detonating cable is pulled to a ship to tie a blasting wire pile and is bound;
according to the designed line length, the protection rope is loosened slowly in cooperation with the movement of the drill ship until the drill ship moves to a specified position, the protection rope is bound on one blasting line pile, and the detonating cable is hung on the other blasting line pile in a loose manner;
(7) inspection security protection detonating network
And finishing the layout of the security detonation network and checking the network. Arranging all the foot lines orderly, checking the network connection sequence and the connection quality, checking whether the missed connection or the misconnection exists, arranging the whole line to ensure that the whole network connection is correct, and initiating a detonation signal and detonating after all warning work is done.
The specific operation of laying the security detonation network in the step (6) is as follows:
1) tightening and stressing the protective ropes of the blast holes, and bundling the protective ropes together;
2) connecting a protection rope extending out of the blast hole with a protection rope outside the blast hole to form a stress line;
3) connecting the detonating tube with a detonating cable to form a detonating line and loosely winding the detonating line on the protective rope;
4) the firing pin and the detonating tube are connected and then placed into the firing pin security device, the end cover is screwed down, the gaps are tightly wrapped, and the firing pin security device is bound to the protection rope.
The protective tube is
The length of the protective tube is determined by the length of the detonating tube.
And two ends of the protective tube, which are contacted with the detonating tube, are respectively bonded and fixed by an electric adhesive tape.
The detonation cable is loosely wound on the protective rope, and is not stressed.
The invention has the advantages that:
1. according to the safe construction method of the network of the water transportation engineering, the water transportation engineering network is actually tried out through the projects of channel regulation construction from the Xinjiang 244 monument to the fourth-level channel construction of Lincang harbor, channel construction from southwest water transportation sea channel engineering (from the Cao river mouth to the bridge consolidation section) with the No. 1 standard, and the like, and the initiation network is safe and reliable, and has no safety accidents.
2. The length of the protection rope calculated according to the calculation formula is safe and reliable, the detonation tube and the detonation cable in the blasting network can be prevented from being damaged by the impact of the rapid flow, the length of the protection rope which can keep safety under the condition of the rapid flow is designed, and the blasting network is prevented from being damaged.
3. The protective tube is used for guiding the detonating tube out of the blast hole from the blast hole, so that the detonating tube is prevented from being damaged or broken due to friction with the blast hole opening or rock debris, the occurrence of blind blasts is reduced, and the blasting effect and quality are guaranteed.
4. The detonation cable is wound on the protection rope, the protection rope is tensioned, the protection rope is stressed, the detonation cable is not stressed, the detonation cable is prevented from being damaged by rapid current impact, the smoothness of blasting construction is guaranteed, and the construction efficiency is improved.
Drawings
Fig. 1 is a schematic layout diagram of the network security construction method for water transportation engineering according to the present invention.
Labeled as: distance H from deck of drilling machine ship to water surface1Distance H from rock surface to water surface2Distance L between drilling ship and blast hole1Blast hole depth L2A medicine column 1, a protective tube 2 and a protective rope 3.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
The embodiment is only for explaining the invention, and the invention is not limited to the embodiment, and the person skilled in the art can make modifications without inventive contribution to the embodiment as required after reading the present specification, but is protected by the patent law within the scope of the claims of the present invention.
As shown in fig. 1, the connection method of the components used in the network security construction method of the water transportation engineering of the present invention is as follows: the detonating tube connected with the explosive column 1 penetrates through the protective tube 2 and extends out of the blast hole, the detonating tube at the outer part of the hole is connected with a detonating cable through a detonating detonator and an exciting needle, the detonating cable is loosely wound on a protective rope 3, and the protective rope 3 is pulled to a drilling machine ship and is tied on a blasting fuse pile to be tensioned and stressed.
Example 1
The invention relates to an example of a network security construction method of water transport engineering, which comprises the following steps:
(1) design of construction
Drawing a construction design drawing according to the hydrological and geological conditions of a construction area and by combining the engineering practice, and carrying out safe blasting network design;
(2) calculating the length of the protective rope
In order to avoid the damage of the detonating tube and the detonating cable in the blasting network caused by the impact of the rapid stream, the length of the protective rope 3 which keeps safety under the condition of the rapid stream is designed to ensure that the blasting network is not damaged, and the length of the protective rope is calculated according to the following formula:
in the formula: l- - -protective rope length; h1-the distance of the deck of the rig vessel to the water surface; h2-the distance of the rock face to the water surface; l is1-distance of the rig vessel from the blast hole; l is2-shot hole depth; pi- - -circumference ratio, 3.14 is taken; k is the water flow parameter, 4 is taken,
(3) measuring and positioning
The GPS-RTK measurement is used, a control point network is established according to the water transport engineering measurement specification, a radio station reference station is erected on the shore, a mobile station is erected on a construction ship, the ship direction and the ship position are displayed by Haidao ocean measurement software in use, the ship direction is determined by an electronic compass, and the measurement error meets the water transport engineering measurement specification. And a real-time kinematic (RTK) positioning mode is adopted during drilling and positioning of the drilling and blasting ship. Real Time Kinematic (RTK) accuracy requirements: horizontal ± 10mm +1ppm RMS, vertical ± 20mm +1ppm RMS, initialization reliability: typical values are > 99.9%. The reef explosion ship determines the course and uses the electronic compass, the precision can reach 0.5 degrees;
(4) underwater drilling
1) Drilling: after measurement and positioning, the ship is moved to a construction hole site for drilling operation, an underwater down-the-hole blasting construction method is adopted, and a 100-type medium wind pressure down-the-hole drill with the drilling hole diameter of 115mm is used. A series of procedures from drilling to charging are completed by the assistance of a sleeve, the inner diameter of the sleeve is slightly larger than the diameter of a drill rod, a 100-type drilling machine is provided with the sleeve with the diameter of 149mm and the wall thickness of 10 mm. In the construction, the sleeve is used for protecting and fixing the drill rod and isolating and protecting the blast hole, so that the smooth drilling work of the blast hole is ensured;
2) and (3) checking the quality of the blast hole: and after drilling is finished, checking the elevation of the bottom of the blast hole and the quality of formed holes. Utilizing a fixed-length bamboo pole to check the blast hole bottom elevation and the pore-forming quality, poking the fixed-length bamboo pole into a blast hole to be checked, checking a reserved length elevation, comparing the actual drilling depth with the calculated drilling depth, wherein the error is less than 20cm, and simultaneously observing the smoothness degree of the bamboo pole when the bamboo pole extends into the blast hole, judging whether residue in the hole has adverse effect on charge, if the residue is too much, the charge is influenced, and the hole needs to be washed again;
(5) mounting explosive column
1) Processing the grain 1: after the detection of the initiating explosive device is completed, the explosive column 1 is bound according to the coupled or uncoupled explosive charging design to the other detonating tubes of the corresponding sections are connected, the protective rope 3 is bound on the explosive column 1, the detonating tubes are wound on the protective rope 3, and the protective rope 3 is used for reinforcing the explosive column 1 and lifting the explosive column 1 when the explosive is charged so as to prevent the detonating tubes from being broken or cut. The spacing between adjacent grains 1 should not be greater than 50cm and the sympathetic detonation distance of the grains 1. Considering that the clamping effect of the bottom rock of the hole is large, the explosive charging section can be divided into 3 sections, namely the bottom is reinforced to charge the explosive relative to the bottom under the normal condition, the middle part and the top are normally charged, the explosive is about 2-5 times of the linear explosive density when the bottom is reinforced, the length of the explosive is 20 percent of the total length of the explosive charging section, the normal section is 50 percent of the total length of the explosive charging section, and the weakening section is preferably 30 percent of the total length of the explosive charging section;
2) charging: the diameter of a 100-type drilling machine is 115mm, and the diameter of the grain 1 is 90-100 mm. Each time a hole is drilled, the charging of the hole is completed. The reef explosion boat is used for drilling construction, 6-12 holes can be drilled at each time, and after drilling of one boat position is completed, the total explosive amount and the single-section maximum explosive amount are checked, so that the single-section maximum explosive amount and the one-time initiation total explosive amount are prevented from exceeding the control blasting design. When the single-hole explosive amount exceeds the calculated single-section maximum explosive amount, segmented explosive charging is utilized, explosive columns in the holes are separated by plugs and are blocked by coarse sand bags, small-section explosive columns 1 are arranged at the upper parts, large-section explosive columns 1 are arranged at the lower parts, a protective rope 3 is lifted, a detonating tube is straightened, the explosive columns 1 required by design are slowly put into the blast holes through a sleeve, the detonating tube is prevented from being damaged and broken in the gliding process of the explosive columns, and the explosive columns 1 are guaranteed to be installed to the bottom;
(6) laying security protection detonation network
When the planned hole number is drilled, after the drilling and charging work is completed, the initiation network connection is carried out, and after the bound explosive columns 1 are installed in each blast hole according to the initiation network scheme designed by construction organization, different sections of plastic detonating tube detonators are installed in each blast hole to serve as initiation detonators, and different sections of plastic detonating tube detonators are externally used in the blast holes to serve as booster detonators. Installing a protective tube 2 extending from the top of a powder column 1 to the outside of a blast hole, wherein the protective tube 2 is installed from the bottom of a balance weight and a blocking object and extends to the outside of an orifice of the blast hole by 0.5m, a detonating tube in the hole is wound on a protective rope 3 and is led out of the hole after penetrating through the protective tube 2 so as to prevent the detonating tube from being broken by the impact of a rapid current or broken by broken stones, the detonating tube positioned at the outer part of the hole is firmly connected with a booster detonator, and the connection part of the detonating tube and the booster detonator is loosely bound on the protective rope 3; the other end of the booster detonator is connected with a detonating cable, the detonating cable is wound on the protective rope 3, the protective rope 3 is stressed, the detonating cable is not stressed, a safe detonating line is formed, and the detonating cable is pulled to a gunwire tying pile on a ship to be tied;
according to the designed line length, the protection rope 3 is loosened slowly in coordination with the movement of the drill ship until the drill ship moves to a specified position, the protection rope 3 is bound on one blasting line pile, and the detonating cable is hung on the other blasting line pile in a loose manner;
(7) inspecting security detonation network and detonating
And finishing the layout of the security detonation network and checking the network. Arranging all detonating tubes orderly, checking the network connection sequence and connection quality, checking whether missing connection and misconnection exist, arranging the whole circuit and ensuring that the whole network connection is correct; after all warning works are done, initiating a detonation signal and detonating.
The specific operation of laying the security detonation network in the step (6) is as follows:
1) tightening the protective ropes 3 of each blast hole to bear force, and bundling the protective ropes together;
2) connecting a protection rope 3 extending out of the blast hole with the protection rope 3 outside the blast hole to form a stress line;
3) connecting the detonating tube with a detonating cable to form a detonating line and loosely winding the detonating line on the protective rope 3;
4) the firing pin and the detonating tube are connected and then placed into the firing pin security device, the end cover is screwed down, the gaps are tightly wrapped, and the firing pin security device is bound to the protection rope 3.
The safety technical requirements in construction are as follows:
(1) and (4) setting up blasting construction safety management rules and initiating explosive device management rules, and implementing the rules.
(2) According to design requirements and field conditions, blasting design is carried out, and related departments report auditing and approval, so that the safety and reliability of the blasting scheme are technically ensured.
(3) The storage of the initiating explosive device is performed according to relevant regulations and the approval of relevant departments is reported. And establishing a strict warehousing acceptance system, strictly forbidding multiple random occurrences, certificating and post-working, and strictly forbidding operation without certifications.
(4) During blasting construction, blasting technicians and blasting safety personnel must carry out supervision and guidance on the site.
(5) Each blasting must strictly execute a warning system, an obvious warning sign is set, and safety warning personnel and operating personnel must wear safety helmets or armmarks; personnel and equipment are reminded to evacuate from the warning area through broadcasting and whistle, and accidents are prevented.
(6) And (4) carrying out safety technology intersection on each process and technical departments, finding out a dangerous source with possible accidents before construction, and taking measures to prevent the accidents.
(7) The weather forecast and the change are closely concerned, a normal weather forecast and water level fluctuation monitoring mechanism is established, wind and rain prevention measures are made, communication facilities of all working faces are guaranteed to be smooth, the mechanical state is good, and protection equipment is complete.
According to the safe construction method of the network of the water transportation engineering, the water transportation engineering network is actually tried out through the projects of channel regulation construction from the Xinjiang 244 monument to the fourth-level channel construction of Lincang harbor, channel construction from southwest water transportation sea channel engineering (from the Cao river mouth to the bridge consolidation section) with the No. 1 standard, and the like, and the initiation network is safe and reliable, and has no safety accidents.
Claims (5)
1. A safe construction method for a water transport engineering network is characterized by comprising the following steps:
(1) design of construction
Drawing a construction design drawing according to the hydrological and geological conditions of a construction area and by combining the engineering practice, and carrying out safe blasting network design;
(2) calculating the length of the protective rope
In order to avoid the damage of a detonating tube and a detonating cable in the blasting network caused by the impact of the rapid stream, the length of a protection rope which keeps safety under the condition of the rapid stream is designed to ensure that the blasting network is not damaged, and the length of the protection rope is calculated according to the following formula:
in the formula: l- - -protective rope length; h1-the distance of the deck of the rig vessel to the water surface; h2-the distance of the rock face to the water surface; l is1-distance of the rig vessel from the blast hole; l is2-shot hole depth; pi- - -circumferential ratio; k-water flow parameters are calculated according to the water flow parameters,
(3) measuring and positioning
Establishing a control point network by using GPS-RTK measurement according to a water transport engineering measurement specification, erecting a mobile station on a construction ship by erecting a reference station, displaying ship direction, a real-time position of a drilling machine and a designed drilling hole position by using measurement software, and checking that the reef explosion ship is consistent with the designed hole position;
(4) underwater drilling
1) Drilling arrangement: arranging blast holes according to the hole pitch and the row pitch required by design, and designing a hole arrangement mode;
2) drilling: after the driller ship measures and positions, a large-aperture down-the-hole driller with the diameter of phi 100mm is used for vertically drilling holes on the designed hole sites;
(5) mounting explosive column
While drilling, determining the charge amount, the charge length, the length of a blocking section and the length parameters of a protective tube of a blast hole, processing and binding a charge column according to design requirements, binding a protective rope on the charge column, winding the detonating tube on the protective rope, lifting the charge column when the protective rope is used for reinforcing the charge column and charging to prevent the detonating tube from being pulled off, pulling the protective rope and straightening the detonating tube when charging, slowly putting the charge column according to the design requirements into the blast hole through a sleeve, preventing the detonating tube from being scratched and broken in the process of gliding down the charge column, and ensuring that the charge column is installed to the bottom;
(6) laying security protection detonation network
After charging of each blast hole is completed, a security protection initiation network is laid, after the bound explosive columns are installed in each blast hole, different sections of plastic detonating tube detonators are installed in each blast hole to serve as initiation detonators, different sections of plastic detonating tube detonators are used as booster detonators outside the blast hole, a protective tube extending out of the blast hole is installed from the top of the explosive columns, the detonating tubes in the holes are wound on protective ropes and extend out of the holes through the protective tubes to prevent the detonating tubes from being broken by rush current impact or broken by broken stones, the detonating tubes outside the holes are firmly connected with the booster detonators, and the joints of the detonating tubes and the booster detonators are loosely bound on the protective ropes; the other end of the booster detonator is connected with a detonating cable, the detonating cable is wound on a protective rope, the protective rope is stressed, the detonating cable is not stressed, a safe detonating line is formed, and the detonating cable is pulled to a ship to tie a blasting wire pile and is bound;
according to the designed line length, the protection rope is loosened slowly in cooperation with the movement of the drill ship until the drill ship moves to a specified position, the protection rope is bound on one blasting line pile, and the detonating cable is hung on the other blasting line pile in a loose manner;
(7) inspection security protection detonating network
The method comprises the steps of finishing the layout of a security protection detonation network, checking the network, tidying all pin wires, checking the connection sequence and the connection quality of the network, checking whether the connection is missed or misconnected, straightening the whole line, ensuring that the whole network connection is correct, initiating a detonation signal and detonating after all warning work is done.
2. The method for the safe construction of the water transportation engineering network as claimed in claim 1, wherein the specific operation of the step (6) of laying the security detonation network is as follows:
1) tightening and stressing the protective ropes of the blast holes, and bundling the protective ropes together;
2) connecting a protection rope extending out of the blast hole with a protection rope outside the blast hole to form a stress line;
3) connecting the detonating tube with a detonating cable to form a detonating line and loosely winding the detonating line on the protective rope;
4) the firing pin and the detonating tube are connected and then placed into the firing pin security device, the end cover is screwed down, the gaps are tightly wrapped, and the firing pin security device is bound to the protection rope.
3. The method as claimed in claim 1, wherein the protective pipe is a pipe
The length of the protective tube is determined by the length of the detonating tube.
4. The method as claimed in claim 1, wherein the protection tube is fixed to the explosion-proof tube by an electric tape.
5. The method as claimed in claim 1, wherein the detonation cable is loosely wound around the protective rope.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877769A (en) * | 2022-03-24 | 2022-08-09 | 广西桂物***工程有限公司 | Offshore bank underwater slope bedrock blasting excavation construction method and blasting charge structure |
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Application publication date: 20210806 |