CN212806779U - Boulder pre-blasting charging structure - Google Patents
Boulder pre-blasting charging structure Download PDFInfo
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- CN212806779U CN212806779U CN202021730267.3U CN202021730267U CN212806779U CN 212806779 U CN212806779 U CN 212806779U CN 202021730267 U CN202021730267 U CN 202021730267U CN 212806779 U CN212806779 U CN 212806779U
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Abstract
A boulder pre-blasting charge structure comprises a sleeve, plastic partition plates are arranged in the sleeve at intervals along the vertical direction, and explosive bags are arranged between the plastic partition plates; expansion materials are arranged between the plastic partition plate and the bottom of the sleeve and between the plastic partition plate and the top of the sleeve, and rubber films wrap the expansion materials; an air compressor on the ground is connected with a water tank, and the water tank injects water into the expansion material through a water injection hose; the ground detonator is connected with the explosive package through a detonating cord. The utility model discloses an above-mentioned structure provides a simple structure, convenient to use, the good boulder loaded constitution that explodes in advance of security.
Description
Technical Field
The utility model relates to an engineering geophysical prospecting field specifically indicates a loaded constitution that is used for boulder to explode in advance.
Background
In the tunnel construction process, especially in the shield tunnel construction, the existence of the boulder can cause great difficulty to the construction. The boulder has the characteristic of random dispersion due to the complex crust change, and the shield machine is difficult to break by self force because of the larger strength of the boulder. The influence of the boulder on the shield tunneling is mainly as follows: (1) extruding to cause the shield machine to deviate; (2) the shield front blade is seriously damaged: (3) causing poor face stability; (4) the collision and the polishing with the boulder in the tunneling process cause the damage of construction vibration to surrounding buildings, soil layers and the like. The boulder is mainly processed by blasting, large boulders are crushed into small boulders, and the boulders can be cleaned by a shield machine. The utility model discloses a through designing a loaded constitution, the horizontal energy of reinforcing explosive blasting improves the blasting effect.
Disclosure of Invention
The utility model provides an boulder is blasting loaded constitution in advance has solved the not good problem of boulder pre-explosion effect that exists among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a boulder pre-blasting charge structure comprises a sleeve, plastic partition plates are arranged in the sleeve at intervals along the vertical direction, and explosive bags are arranged between the plastic partition plates; expansion materials are arranged between the plastic partition plate and the bottom of the sleeve and between the plastic partition plate and the top of the sleeve, and rubber films wrap the expansion materials; an air compressor on the ground is connected with a water tank, and the water tank injects water into the expansion material through a water injection hose; the ground detonator is connected with the explosive package through a detonating cord.
The water injection hose inside be equipped with the electrode slice, the electrode slice be two, the electrode slice is connected with the universal meter on ground through measuring the electric wire.
The rubber membrane is provided with an exhaust hole.
The water tank is a two-grid water tank, one grid supplies water for the expansion material on the upper side, the other grid supplies water for the expansion material on the lower side, and a valve is arranged at a water outlet of each grid water tank.
The utility model has the advantages that:
the utility model provides an boulder pre-blasting charge structure through the structure, which comprises a sleeve, plastic partition plates are arranged at intervals in the sleeve along the up-down direction, and explosive bags are arranged between the plastic partition plates; expansion materials are arranged between the plastic partition plate and the bottom of the sleeve and between the plastic partition plate and the top of the sleeve, and rubber films wrap the expansion materials; an air compressor on the ground is connected with a water tank, and the water tank injects water into the expansion material through a water injection hose; the ground detonator is connected with the explosive package through a detonating cord. The utility model discloses an above-mentioned structure provides a boulder is filled charge structure of blasting in advance that powder charge is simple, convenient to use, security are high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a layout diagram of the device of the present invention.
Reference numbers in the figures: 1 air compressor machine, 2 valves, 3 universal meters, 4 detonating cords, 5 detonators, 6 water tanks, 7 water injection hoses, 8 exhaust holes, 9 rubber membranes, 10 electrode plates, 11 expansion materials, 12 measuring wires, 13 plastic partition plates, 14 explosive packages, 15 sleeves, 16 boulders and 17 explosive charging structures.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, the boulder pre-blasting charging structure comprises a sleeve 15, plastic partition plates 13 are arranged in the sleeve 15 at intervals along the up-down direction, and an explosive charge 14 is arranged between the plastic partition plates 13 and the plastic partition plates 13; expansion materials 11 are arranged between the plastic partition plate 13 and the bottom of the sleeve 15 and between the plastic partition plate 13 and the top of the sleeve 15, and rubber films 9 are wrapped outside the expansion materials 11; an air compressor 1 on the ground is connected with a water tank 6, and the water tank 6 injects water into an expansion material 11 through a water injection hose 7; an initiator 5 at ground level is connected to the explosive charge 14 by a detonating cord 4.
The water injection hose 7 inside be equipped with electrode slice 10, electrode slice 10 be two, electrode slice 10 is connected with universal meter 3 on ground through measuring wire 12.
The rubber membrane 9 is provided with an exhaust hole 8.
The water tank 6 is a two-grid water tank, one grid supplies water for the expansion material 11 on the upper side, the other grid supplies water for the expansion material 11 on the lower side, and a valve 2 is arranged at the water outlet of each grid water tank 6.
The part in the sleeve 15 constitutes a charge structure 17, and the charge structure 17 is arranged at the position of the boulder 16 according to the use requirement.
When in specific use:
(1) drilling blast hole
And designing parameters such as blast hole spacing, depth and the like according to the position, buried depth and size of the boulder which are already found out, and carrying out drilling construction.
(2) Charging structure assembly
The charge structure includes: explosive package: the dosage is determined by design and test when the powder is used for breaking the boulder; plastic partition board: the device is used for separating explosive bags or expanding materials, is in a shape of a circular cake and is made of PVC materials, and has the same outer diameter as the inner diameter of the sleeve and the thickness of 2-5 mm; sleeving a sleeve: the diameter is slightly less than blast hole diameter for place the material, and length is: the sum of the length of the explosive bag and the thickness of the partition board is added with 20mm (placing an expansion material), and the energy release of the explosive bag is facilitated by adopting a brittle and easily-damaged material; an expansion material: containing sand: cement: expansive soil: uniformly mixing the materials according to the proportion, wherein the water ratio is 1.5:3:4: 1.5; rubber film: the elastic material is impermeable, the expansion material is completely wrapped, a hole with the diameter of 4mm is reserved for connecting a water injection hose and a reticular exhaust hole with the diameter of 10mm, and the aperture of the reticular hole is smaller than 0.5 mm; water injection hose: the diameter is 5mm, and the hose is used for injecting water with good amount outside the hole into the expansion material; electrode sheet: copper, set up two electrode slices at the position of 50mm apart from the delivery port, inside the electrode slice can contact the water injection hose, electrode slice connection measurement electric wire to the blast hole outside.
The weighted medicine bags are filled into the casing pipe, the medicine bags are separated by plastic clapboards, and the distance between the outer clapboards and the end part of the casing pipe is 20 mm. According to fine sand: cement: expansive soil: weighing the materials in the expansion material according to the proportion of 1.5:3:4:1.5, uniformly mixing, wrapping by using a rubber film to prepare a cylindrical shape, wherein the diameter of the cylindrical shape is the inner diameter of the sleeve, the length of the cylindrical shape is 1.5 times of the diameter of the blast hole, inserting a water outlet of a water injection hose into the central position of the expansion material, packaging two expansion materials into two ends of the sleeve, keeping a water outlet of an upper expansion material bag right above, keeping a water outlet of a lower expansion material bag below a clapboard at the lowest side (keeping an exhaust hole right above the expansion material bag to facilitate exhaust during water injection), and keeping a material loading port on the side of the clapboard and firmly binding.
(3) Place loaded constitution
A multimeter: when the water is contained in the water injection hose, the two electrode plates are conducted, the multimeter has a reading, and otherwise, the reading is 0; two grids of water tanks: two water outlets of the water tank are respectively connected to an upper expansion material bag and a lower expansion material bag through water injection hoses, and the water injection hoses which are about 0.5m away from the water outlets are connected through valves to control the injection of water; an air compressor: and the water tank is connected with the two-grid water tank, water in the water tank and the water injection hose is pressed into the expansion material bag, and the water tank is in a closed state except for three connecting positions of the water tank, the air compressor and the water injection hose.
And placing the charging structure at a designed blasting position, connecting two water injection hose connecting valves to the two grid water tanks respectively, closing the valves, and adding water with the mass of 3/17 in the expansion material bags in the two grid water tanks respectively. The detonating cord is connected to the outside of the blast hole and is not connected with the detonator. And the upper and lower groups of electrode plates are respectively connected into a universal meter (double-display or two universal meters are adopted), and the universal meter is in a starting state. And (3) opening two valves on the water injection hose, discharging water to enter the expansion material, starting the air compressor to inject high-pressure air when the water level in the two water tanks does not fall (the universal meter has a reading), and closing the valves on the corresponding water injection hoses after the reading of the universal meter returns to 0 until the two readings are both 0.
(4) Blasting
Evacuating the air compressor, the two water tanks, the universal meter and other equipment and personnel in the safety range around the blast hole, connecting the detonating cord with the detonator after confirming the safety of the surrounding environment, and operating the detonating cartridge according to the relevant safety specifications.
(5) Confirming blasting quality and environmental safety
And performing blasting quality inspection and environmental safety confirmation according to relevant standard standards.
Example 1:
a section of 4.5km long area in a subway line of a certain place in the city of building province of Fujian province adopts a shield construction process, and the stratum in the area is revealed to have a small amount of boulders according to a survey report. The method confirms that the burial depth of a certain boulder is 21.90m and the size is 1.82 multiplied by 0.86 multiplied by 1.05m by methods of geophysical prospecting, drilling and the like, and the boulder is treated by adopting a blasting mode. The design dosage is 22kg for three explosive packages and 6 blast holes for total.
Firstly, blast holes are drilled, the hole diameter is 60mm, and the drill holes penetrate through the boulder. The distance between the blast holes is 0.5 multiplied by 0.7m, and the hole depth is 23.9 m. And cleaning the holes after drilling and detecting to confirm that the bottoms of the holes are all located above 0.5m below the blasting points. The medicine package and the clapboard are sequentially put into a sleeve with the diameter of 60mm and compacted, and the mixture ratio of the expansion material is designed as fine sand: cement: expansive soil: 15kg of water, 30kg of water, 40kg of water and 15kg of water, uniformly mixing the materials, filling the materials into a rubber film, preparing two columnar expansion material bags with the diameter of 60mm and the length of 90mm, filling the two columnar expansion material bags into two ends of a sleeve, wherein an exhaust hole of one expansion material bag is positioned in the middle of the end part, and an exhaust hole of one expansion material bag is 10mm away from a partition plate. And inserting the water outlet of the water injection hose on one side with the electrode plate into the two expansion material bags, wherein the water outlet is positioned in the center of the expansion material bags, and the electrode plate is tightly attached to the joint position of the rubber membrane and the water injection hose. The charge structure was placed to a depth of 21.90m, two water injection hoses were connected to the valves and then to two water tanks, respectively, the valves were closed, and water (1.5kg) in an amount of 3/17 g of the expanded material packet was added to each of the two water tanks. The detonating cord is connected to the outside of the blast hole and is not connected with the detonator. And respectively connecting the upper and lower groups of electrode plates into a universal meter and starting the universal meter. Open two valves on the water injection hose, the entering expanding material of draining, treat 3min back two check water tanks water level when not descending, the universal meter all has the reading this moment, opens the air compressor machine and pours into highly-compressed air into, 1min30s back upside expanding material package corresponds universal meter reading is 0, closes corresponding valve, 1min back downside expanding material package corresponds universal meter reading is 0, closes the valve and closes the air compressor machine simultaneously. The above steps were carried out for 6 blastholes. And evacuating the air compressor, the two water tanks, the universal meter and other equipment and personnel in a safety range around the blast hole, and after confirming the safety of the surrounding environment, connecting each detonating cord with the detonator and carrying out detonation operation. When the shield machine tunnels to the position of the boulder, the maximum length of the excavated fragments is 0.19m, which indicates that the boulder blasting effect is good.
Claims (4)
1. A boulder pre-blast charge construction comprising a sleeve (15), characterized in that: plastic partition plates (13) are arranged in the sleeve (15) at intervals along the up-down direction, and explosive bags (14) are arranged between the plastic partition plates (13) and the plastic partition plates (13); expansion materials (11) are arranged between the plastic partition plate (13) and the bottom of the sleeve (15) and between the plastic partition plate (13) and the top of the sleeve (15), and rubber films (9) are wrapped outside the expansion materials (11); an air compressor (1) on the ground is connected with a water tank (6), and the water tank (6) injects water into an expansion material (11) through a water injection hose (7); the ground detonator (5) is connected with the explosive package (14) through a detonating cord (4).
2. The solitary stone pre-blasting charge construction of claim 1, wherein: the water injection hose (7) inside be equipped with electrode slice (10), electrode slice (10) be two, electrode slice (10) are connected with universal meter (3) on ground through measuring electric wire (12).
3. The solitary stone pre-blasting charge construction of claim 1, wherein: the rubber membrane (9) is provided with an exhaust hole (8).
4. The solitary stone pre-blasting charge construction of claim 1, wherein: the water tank (6) is a water tank with two grids, one grid supplies water for the expansion material (11) on the upper side, the other grid supplies water for the expansion material (11) on the lower side, and a valve (2) is arranged at the water outlet of each grid water tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021730267.3U CN212806779U (en) | 2020-08-19 | 2020-08-19 | Boulder pre-blasting charging structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021730267.3U CN212806779U (en) | 2020-08-19 | 2020-08-19 | Boulder pre-blasting charging structure |
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| CN212806779U true CN212806779U (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295017A (en) * | 2021-11-24 | 2022-04-08 | 中国建筑第六工程局有限公司 | Shield section high-strength spherical weathering body deep hole blasting pretreatment construction method |
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2020
- 2020-08-19 CN CN202021730267.3U patent/CN212806779U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295017A (en) * | 2021-11-24 | 2022-04-08 | 中国建筑第六工程局有限公司 | Shield section high-strength spherical weathering body deep hole blasting pretreatment construction method |
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