CN113047898A - Tunnel blasting protection device and using method thereof - Google Patents
Tunnel blasting protection device and using method thereof Download PDFInfo
- Publication number
- CN113047898A CN113047898A CN202110213280.4A CN202110213280A CN113047898A CN 113047898 A CN113047898 A CN 113047898A CN 202110213280 A CN202110213280 A CN 202110213280A CN 113047898 A CN113047898 A CN 113047898A
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- roller
- tunnel
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- rotating sleeve
- walking
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- 238000005422 blasting Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 12
- 230000000903 blocking effect Effects 0.000 claims abstract description 46
- 238000005507 spraying Methods 0.000 claims description 34
- 230000001012 protector Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 11
- 238000003915 air pollution Methods 0.000 abstract description 6
- 238000009435 building construction Methods 0.000 abstract description 2
- 239000004575 stone Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009430 construction management Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/14—Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
- E21F5/143—Fluid barriers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of building construction, aims to solve the problems that blasting has large influence on the surrounding environment, poor construction safety, large air pollution, poor maneuverability and easy economic loss in the prior art, and provides a tunnel blasting protection device which comprises a walking device; the traveling device is provided with a first roller and a second roller, the first roller and the second roller are rotatably connected with the traveling device, the first roller and the second roller are positioned on the same side of the traveling device, and the first roller and the second roller are mutually distributed at intervals; be equipped with blocking device on the running gear, the rotatable connection in running gear one end of blocking device one end is equipped with a plurality of telescopic adjusting device between running gear and the blocking device, and a plurality of adjusting device's one end is articulated to be connected in running gear, and a plurality of adjusting device's the other end is articulated to be connected in blocking device. The invention has the advantages of small influence of blasting on the surrounding environment, high construction safety, small air pollution, good maneuverability and difficult economic loss.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a tunnel blasting protection device and a using method thereof.
Background
The construction of the highway tunnel follows the principle of the new Austrian method, the tunnel face is constructed by adopting a drilling and blasting method, and blast holes are drilled on the face according to blasting design and are detonated after charging.
The tunnel advances hole construction stage, and the blasting influences greatly to surrounding environment, and the face soil body can produce many little cubic rocks in the twinkling of an eye of breaking out, and cubic rocks receives the influence of blasting impact force, can fly to all around with extremely fast speed irregularity, can puncture the peripheral house glass in tunnel entrance to a cave, if hit construction operation personnel, still can cause the casualties, and then cause the incident.
At present, before blasting construction in the tunnel entrance stage of a domestic highway tunnel, an evacuation mode is generally adopted, construction management and operating personnel are evacuated to a safe distance range, damage to personnel caused by blasting is prevented, however, houses, mechanical equipment and the like around a tunnel portal cannot be moved, blasting construction still can affect the houses, and economic loss can be caused in serious situations.
Disclosure of Invention
The invention aims to provide a tunnel blasting protection device and a using method thereof, and aims to solve the problems that blasting has large influence on the surrounding environment, poor construction safety, large air pollution, poor maneuverability and easy economic loss in the prior art.
The embodiment of the invention is realized by the following steps:
the embodiment of the invention provides a tunnel blasting protection device, which comprises a walking device, a driving device and a control device, wherein the walking device comprises a walking device body; the walking device is provided with a first roller and a second roller, the first roller and the second roller are rotatably connected with the walking device, the first roller and the second roller are both positioned on the same side of the walking device, and the first roller and the second roller are mutually distributed at intervals;
the walking device is provided with a blocking device, one end of the blocking device is rotatably connected to one end of the walking device, a plurality of telescopic adjusting devices are arranged at the included angle between the walking device and the blocking device, one ends of the adjusting devices are hinged to the walking device, and the other ends of the adjusting devices are hinged to the back of the blocking device.
The tunnel blasting protector disclosed by the embodiment is provided with the travelling device and the blocking device, so that the tunnel blasting protector can block splashing of a mountain during tunnel blasting, and can move the device according to the requirement of the environment, and therefore the tunnel blasting protector disclosed by the embodiment has the beneficial effects that blasting influences the surrounding environment less, the construction safety is high, air pollution is small, the maneuverability is good, and economic loss is not caused easily.
Optionally: the walking device is provided with a horizontally arranged supporting plate, a first clamp and a second clamp are arranged on the lower plate surface of the supporting plate, the first roller is rotatably connected to the first clamp, and the second roller is rotatably connected to the second clamp.
By the arrangement, the walking device 1 has the function of automatic walking, and the maneuverability of the device is effectively improved.
Optionally: the first clamp and the second clamp are distributed at intervals and are positioned on the same horizontal axis.
Optionally: the lower part of above-mentioned backup pad is equipped with a plurality of telescopic supporting legs, and the one end of a plurality of above-mentioned supporting legs is connected perpendicularly in the lower face of above-mentioned backup pad, and the even both sides in above-mentioned backup pad that distribute in of a plurality of above-mentioned supporting legs.
So set up, be favorable to the fixing outside the tunnel portal that above-mentioned running gear can be stable, above-mentioned supporting leg plays support and fixed effect to running gear.
Optionally: the supporting leg is provided with a pressure cylinder, one end of the pressure cylinder is fixedly connected to the lower plate surface of the supporting plate, the other side of the pressure cylinder is provided with a pressure rod, and the pressure rod is connected to the other end of the pressure cylinder in a sliding mode.
So set up the supporting leg and set up to the telescopic form, conveniently adapt to different environment, improve the application scope of device.
Optionally: the adjusting device comprises a rotating sleeve, wherein an internal thread is arranged in the rotating sleeve, a first screw and a second screw are respectively arranged at two ends of the rotating sleeve, external threads are respectively arranged on the outer peripheral surfaces of the first screw and the second screw, the first screw is rotatably connected into one end of the rotating sleeve, and the second screw is rotatably connected into the other end of the rotating sleeve; the thread directions of the two ends of the rotating sleeve are opposite.
So set up for adjusting device can adjust the contained angle between above-mentioned blocking device and the above-mentioned running gear, makes blocking device laminate in the tunnel portal, and has the effect of supporting to above-mentioned blocking device.
Optionally: the outer end of the first screw rod is hinged to the upper plate surface of the supporting plate, the outer end of the second screw rod is provided with a connecting piece, the outer end of the second screw rod is hinged to one end of the connecting piece, and the other end of the connecting piece is hinged to the back surface of the blocking device.
So configured, the respective hinged connections facilitate deployment and retraction of the blocking device.
Optionally: the blocking device is provided with a frame, a rubber pad is arranged on the frame, and the rubber pad is detachably connected with the frame.
So set up, can prevent that the soil stone after the blasting from splashing everywhere, be favorable to the change and the maintenance of rubber pad, and then prolong the life of this device.
Optionally: the tail part of the supporting plate is provided with a spraying device which is rotatably connected with the supporting plate, a water inlet pipe is arranged outside the spraying device, and one end of the water inlet pipe is fixedly connected with the spraying device; the spraying device is disc-shaped, a plurality of nozzles are arranged on the peripheral surface of the spraying device, and the plurality of nozzles are uniformly distributed on the peripheral surface of the spraying device.
So set up, the waterwall that the sprinkler of above-mentioned backup pad afterbody sprinkled can be in certain extent with the smoke and dust control after the blasting, reduces the pollution of blasting to the surrounding environment and to the pollution of air.
In one implementation of this embodiment: the application method of the tunnel blasting protection device is also provided:
the method comprises the following steps: pushing the walking device to the tunnel entrance, then putting down the supporting legs at the two sides of the supporting plate, and fixing the walking device on the ground through the supporting legs to play a role of supporting the walking device;
step two: then, the first screw rod and the second screw rod at the two ends of the rotating sleeve can rotatably extend outwards by rotating the rotating sleeve of the adjusting device, so that the blocking device is supported until the blocking device is attached to the tunnel portal;
step three: secondly, starting a spraying device at the tail part of a support plate in the traveling device, so that the spraying device sprays a water blocking wall to cover the tunnel mouth;
step four: finally, the persons are evacuated and the tunnel portal is detonated at a remote location. At the moment, a large amount of soil and stones sprayed after the tunnel portal is blasted can be blocked by the blocking device, so that the soil and stones are prevented from splashing everywhere, and the water wall sprayed by the spraying device at the tail part of the supporting plate can control the blasted smoke dust within a certain range.
In combination with the above description, the tunnel blasting protection device and the using method thereof disclosed by the invention have the beneficial effects that the blasting has small influence on the surrounding environment, the construction safety is high, the air pollution is small, the maneuverability is good, and the economic loss is not easy to cause.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a tunnel explosion protection device in an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a blocking device in an embodiment of the present invention.
Icon: 1-a walking device; 2-a first roller; 3-a second roller; 4-a blocking device; 5-a regulating device; 6-a support plate; 7-a first clamp; 8-a second clamp; 9-supporting legs; 10-a pressure cylinder; 11-a pressure bar; 12-a backing plate; 13-rotating the sleeve; 14-a first screw; 15-a second screw; 16-a connector; 17-a frame; 18-rubber pad; 19-a spraying device; 20-water inlet pipe; 21-a nozzle; 22-a rod member; 23-bolt holes; 24-latch.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1 and fig. 2, the present embodiment provides a tunnel blasting protection device, which includes a traveling device 1; the walking device 1 is provided with a first roller 2 and a second roller 3, the first roller 2 and the second roller 3 are rotatably connected to the walking device 1, the first roller 2 and the second roller 3 are both positioned on the same side of the walking device 1, and the first roller 2 and the second roller 3 are mutually distributed at intervals;
the walking device 1 is provided with a blocking device 4, one end of the blocking device 4 is rotatably connected to one end of the walking device 1, a plurality of telescopic adjusting devices 5 are arranged at an included angle between the walking device 1 and the blocking device 4, one ends of the adjusting devices 5 are hinged to the walking device 1, and the other ends of the adjusting devices 5 are hinged to the back of the blocking device 4.
The tunnel blasting protector disclosed by the embodiment is provided with the walking device 1 and the blocking device 4, so that the tunnel blasting protector can block splashing of a mountain during tunnel blasting, and can move the device according to the requirement of the environment, therefore, the tunnel blasting protector disclosed by the embodiment has the beneficial effects that blasting influences the surrounding environment less, the construction safety is high, air pollution is small, the maneuverability is good, and economic loss is not easy to cause.
Referring to fig. 1 and 2, the traveling device 1 includes a horizontally disposed support plate 6, a first clamp 7 and a second clamp 8 are disposed on a lower plate surface of the support plate 6, the first roller 2 is rotatably connected to the first clamp 7, and the second roller 3 is rotatably connected to the second clamp 8.
By the arrangement, the walking device 1 has the function of automatic walking, and the maneuverability of the device is effectively improved.
The first clamp 7 and the second clamp 8 are spaced apart from each other and are located on the same horizontal axis.
The lower part of the supporting plate 6 is provided with a plurality of telescopic supporting legs 9, one ends of the supporting legs 9 are vertically connected to the lower plate surface of the supporting plate 6, and the supporting legs 9 are uniformly distributed on two sides of the supporting plate 6.
So set up, be favorable to above-mentioned running gear 1 can be stable fix outside the tunnel portal, above-mentioned supporting leg 9 plays the effect of supporting and fixing running gear 1.
The support legs 9 have a cylinder 10, one end of the cylinder 10 is fixedly connected to the lower plate surface of the support plate 6, the other side of the cylinder 10 is provided with a pressure rod 11, and the pressure rod 11 is slidably connected to the other end of the cylinder 10.
So set up supporting leg 9 and set up to the telescopic form, conveniently adapt to different environment, improve the application scope of device.
The outer end of the pressure rod 11 is provided with a backing plate 12, and the backing plate 12 is larger than the section of the pressure rod 11, so that the stress area of the outer end of the pressure rod 11 is increased, and the pressure rod 11 is prevented from being inserted into the ground.
The adjusting device 5 includes a rotating sleeve 13, the rotating sleeve 13 has an internal thread therein, both ends of the rotating sleeve 13 are respectively provided with a first screw 14 and a second screw 15, the outer peripheral surfaces of the first screw 14 and the second screw 15 are respectively provided with an external thread, the first screw 14 is rotatably connected in one end of the rotating sleeve 13, and the second screw 15 is rotatably connected in the other end of the rotating sleeve 13; the thread directions of the two ends of the rotating sleeve 13 are opposite.
So set up for adjusting device 5 can adjust the contained angle between above-mentioned blocking device 4 and above-mentioned running gear 1, makes blocking device 4 laminate in the tunnel portal, and has the effect of supporting to above-mentioned blocking device 4.
The outer end of the first screw 14 is hinged to the upper plate surface of the supporting plate 6, the outer end of the second screw 15 is provided with a connecting piece 16, the outer end of the second screw 15 is hinged to one end of the connecting piece 16, and the other end of the connecting piece 16 is hinged to the back surface of the blocking device 4.
So arranged, the respective hinged connections described above facilitate the deployment and retraction of the blocking means 4 described above.
The blocking device 4 has a frame 17, and a rubber pad 18 is provided on the frame 17, and the rubber pad 18 is detachably attached to the frame 17.
So set up, can prevent that the soil stone after the blasting from splashing everywhere, be favorable to the change and the maintenance of rubber pad 18, and then prolong the life of this device.
The connecting element 16 of the adjusting device 5 is connected to the frame 17 of the blocking device 4 by means of a hinge.
A spraying device 19 is arranged at the tail part of the supporting plate 6, the spraying device 19 is rotatably connected to the supporting plate 6, a water inlet pipe 20 is arranged outside the spraying device 19, and one end of the water inlet pipe 20 is fixedly connected to the spraying device 19; the spraying device 19 is a disk shape, a plurality of nozzles 21 are provided on the outer circumferential surface of the spraying device 19, and the plurality of nozzles 21 are uniformly distributed on the outer circumferential surface of the spraying device 19.
By the arrangement, the water wall sprayed by the spraying device 19 at the tail part of the supporting plate 6 can control the smoke dust after blasting within a certain range, and the pollution of blasting to the surrounding environment and the pollution to air are reduced.
The middle part of the spraying device 19 is provided with a rod 22, one end of the rod 22 is fixedly connected with the tail part of the supporting plate 6, the spraying device 19 is rotatably connected on the rod 22, the rod 22 at two sides of the spraying device 19 is provided with a bolt hole 23, a bolt 24 is arranged in the bolt hole 23, and the bolt 24 can limit the spraying device 19 on the rod 22, so that the spraying device 19 can only rotate on the rod 22.
Referring to fig. 1 and 2, in one embodiment of the present embodiment: the application method of the tunnel blasting protection device is also provided:
the method comprises the following steps: pushing the walking device 1 to the tunnel entrance, then putting down the supporting legs 9 on the two sides of the supporting plate 6, and fixing the walking device 1 on the ground through the supporting legs 9 to play a role in supporting the walking device 1;
step two: then, by rotating the rotating sleeve 13 of the adjusting device 5, the first screw 14 and the second screw 15 at the two ends of the rotating sleeve 13 can be extended outwards in a rotating way, so as to support the blocking device 4 until the blocking device 4 is attached to the tunnel portal;
step three: secondly, starting a spraying device 19 at the tail part of a support plate 6 in the walking device 1, so that the spraying device 19 sprays a water blocking wall to cover the tunnel mouth;
step four: finally, the persons are evacuated and the tunnel portal is detonated at a remote location. At this time, a large amount of earth and stones sprayed after the tunnel portal is blasted can be blocked by the blocking device 4, so that the earth and stones are prevented from splashing everywhere, and the water wall sprayed by the spraying device 19 at the tail part of the supporting plate 6 can control the smoke dust after blasting within a certain range.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a tunnel blasting protector which characterized in that:
comprises a walking device;
the walking device is provided with a first roller and a second roller, the first roller and the second roller are rotatably connected to the walking device, the first roller and the second roller are both positioned on the same side of the walking device, and the first roller and the second roller are mutually distributed at intervals;
the walking device is provided with a blocking device, one end of the blocking device is rotatably connected with one end of the walking device, a plurality of telescopic adjusting devices are arranged at the included angle between the walking device and the blocking device, one ends of the adjusting devices are hinged to the walking device, and the other ends of the adjusting devices are hinged to the back of the blocking device.
2. A tunnel blast protector as set forth in claim 1, in which:
the walking device is provided with a horizontally arranged supporting plate, a first clamp and a second clamp are arranged on the lower plate surface of the supporting plate, the first roller is rotatably connected to the first clamp, and the second roller is rotatably connected to the second clamp.
3. A tunnel blast protector as set forth in claim 2, in which:
the first clamp and the second clamp are distributed at intervals and are positioned on the same horizontal axis.
4. A tunnel blast protector as set forth in claim 2, in which:
the lower part of backup pad is equipped with a plurality of telescopic supporting legs, and is a plurality of the one end of supporting leg connect perpendicularly in the lower face of backup pad, it is a plurality of the even distribution of supporting leg in the both sides of backup pad.
5. A tunnel blast protector as set forth in claim 4, in which:
the supporting legs are provided with pressure cylinders, one ends of the pressure cylinders are fixedly connected to the lower plate surface of the supporting plate, pressure rods are arranged on the other sides of the pressure cylinders, and the pressure rods are slidably connected to the other ends of the pressure cylinders.
6. A tunnel blast protector as set forth in claim 2, in which:
the adjusting device is provided with a rotating sleeve, internal threads are arranged in the rotating sleeve, a first screw and a second screw are respectively arranged at two ends of the rotating sleeve, external threads are respectively arranged on the peripheral surfaces of the first screw and the second screw, the first screw is rotatably connected into one end of the rotating sleeve, and the second screw is rotatably connected into the other end of the rotating sleeve;
the thread directions of the two ends of the rotating sleeve are opposite.
7. A tunnel blast protector as set forth in claim 6, in which:
the outer end of the first screw rod is hinged to be connected to the upper plate surface of the supporting plate, the outer end of the second screw rod is provided with a connecting piece, the outer end of the second screw rod is hinged to be connected to one end of the connecting piece, and the other end of the connecting piece is hinged to be connected to the back surface of the blocking device.
8. A tunnel blast protector as set forth in claim 1, in which:
the blocking device is provided with a frame, a rubber pad is arranged on the frame, and the rubber pad is detachably connected with the frame.
9. A tunnel blast protector as set forth in claim 2, in which:
the tail part of the supporting plate is provided with a spraying device which is rotatably connected to the supporting plate, a water inlet pipe is arranged on the outer side of the spraying device, and one end of the water inlet pipe is fixedly connected to the spraying device;
the spraying device is disc-shaped, a plurality of nozzles are arranged on the peripheral surface of the spraying device, and the nozzles are uniformly distributed on the peripheral surface of the spraying device.
10. Use of a tunnel blast protector according to any of claims 1 to 9, characterised in that:
the method comprises the following steps: pushing the walking device to the tunnel entrance, then putting down the supporting legs at the two sides of the supporting plate, and fixing the walking device on the ground through the supporting legs to play a role in supporting the walking device;
step two: then, the rotating sleeve of the adjusting device is rotated, so that the first screw rod and the second screw rod at the two ends of the rotating sleeve can rotatably extend outwards, and the blocking device is supported until the blocking device is attached to the tunnel portal;
step three: secondly, starting a spraying device at the tail part of a support plate in the traveling device, so that the spraying device sprays a water blocking wall to cover the tunnel mouth;
step four: finally, the persons are evacuated and the tunnel portal is detonated at a remote location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213280.4A CN113047898A (en) | 2021-02-26 | 2021-02-26 | Tunnel blasting protection device and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213280.4A CN113047898A (en) | 2021-02-26 | 2021-02-26 | Tunnel blasting protection device and using method thereof |
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| CN113047898A true CN113047898A (en) | 2021-06-29 |
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| CN202110213280.4A Pending CN113047898A (en) | 2021-02-26 | 2021-02-26 | Tunnel blasting protection device and using method thereof |
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| CN212058515U (en) * | 2020-04-09 | 2020-12-01 | 赵欣 | Protection device for open-air blasting |
| CN212133474U (en) * | 2020-04-13 | 2020-12-11 | 中交第二航务工程局有限公司 | Automatic efficient dust removal device used after tunnel blasting |
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