CN219604196U - Roller stone protection net rack for explosion zone - Google Patents
Roller stone protection net rack for explosion zone Download PDFInfo
- Publication number
- CN219604196U CN219604196U CN202320760267.5U CN202320760267U CN219604196U CN 219604196 U CN219604196 U CN 219604196U CN 202320760267 U CN202320760267 U CN 202320760267U CN 219604196 U CN219604196 U CN 219604196U
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- net rack
- fixed
- side slope
- anchor rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004575 stone Substances 0.000 title claims abstract description 27
- 238000004880 explosion Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims description 16
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 15
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 15
- 241001330002 Bambuseae Species 0.000 claims description 15
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 15
- 239000011425 bamboo Substances 0.000 claims description 15
- 239000002023 wood Substances 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000005422 blasting Methods 0.000 abstract description 30
- 230000006378 damage Effects 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 239000011435 rock Substances 0.000 description 17
- 238000005266 casting Methods 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to the technical field of blasting engineering construction, and particularly discloses a rolling stone protection net rack for a blasting area, which comprises anchor rods and a steel pipe net rack fixedly lapped by a cross rod and vertical rods to form and fixed on one side of a side slope, wherein a dense mesh net is fixedly arranged on the outermost side of the steel pipe net rack, a first anchor rod is also fixed on the side slope at the fixed position of a vertical pipe of the steel pipe net rack, a second anchor rod is fixed on the side slope on two sides of the steel pipe net rack, the vertical rods of the steel pipe net rack are inserted into inner holes of the first anchor rods, one ends of the second anchor rods are fixed in pouring layers which are poured upwards layer by layer outside the side slope, the other ends of the second anchor rods are integrally formed with lantern rings, one ends of steel wire ropes are fixed in the lantern rings, the other ends of the steel wire ropes are fixed on the steel pipe net rack, a wooden raft is horizontally placed on the ground at the bottom end of one side of the side slope, and the bottom ends of the vertical pipes of the bottommost are abutted to the wooden raft. This patent provides a pair of explode district with rolling stone protection rack, not only the cost is lower, the installation is convenient with dismantling, and the security is high, and the rolling stone that produces when can avoiding blasting causes harm to resident on every side.
Description
Technical Field
The utility model relates to the technical field of blasting engineering construction, in particular to a rolling stone protection net rack for a blasting area.
Background
At present, along with the rapid development of social economy, the construction of local infrastructures such as residential buildings, office buildings, railways, highways and the like is quickened, and part of open-air mines in China gradually move to villages and town edges, so that the mine blasting environment is more and more complex, and the barren rock generated by mountain blasting causes great threat to the personal safety of people, which is particularly prominent in the blasting process of high-side slopes, namely, the barren rock generated by blasting is a main dangerous factor when the slope open-air mine is blasted, if the slope open-air mine cannot be effectively controlled, blasting safety accidents are extremely easy to be caused, not only life and property safety of residents around the mine can be threatened, but also safety production efficiency of mine mining enterprises can be severely restricted.
In order to avoid the damage of the barren rock generated during blasting to surrounding residents, the prior art adopts a steel pipe bent frame fixedly installed on one side of a blasted side slope to prevent the barren rock from rolling, as disclosed in the prior patent document 201510554756.5, a side slope blasted barren rock near body blocking protection device is arranged at the top of the side slope, a concrete platform is arranged at the bottom of one side of the side slope, anchor rods are arranged on the concrete platform from top to bottom, the anchor rods are fixed in the side slope, a plurality of layers of steel pipe bent frames are upwards arranged on the concrete platform along the side slope, the steel pipe bent frames are formed by overlapping vertical pipes and transverse pipes, the transverse pipes are inserted into anchor rod inner holes, the lower ends of the vertical pipes are fixed on the side slope through pouring concrete, steel wire ropes are arranged between the vertical pipes of each layer of steel pipe bent frame and the corresponding anchor rods, a bamboo springboard is arranged on one side of the uppermost vertical pipe facing the side slope, and a buffering sand bag is arranged between the bamboo springboard and the side slope, and the buffering sand bag exceeds the blasting mining area. The device not only can prevent the generation of blasting rolling stones safely and effectively and avoid the damage of the blasting rolling stones to surrounding residents, but also creates a good working environment.
In the above-mentioned publication, the horizontal tube of the steel tube bent frame is inserted in the inner hole of the anchor rod, set up the wire rope between stock and every layer of standpipe, insert the horizontal tube into the inner hole of the anchor rod to indicate the anchor rod is fixed horizontally in the side slope, then the anchor rod has only a limit function to the horizontal pole, and the stability of the whole steel tube bent frame is realized by wire rope fixed in the bottom end of standpipe in concrete and between standpipe and anchor rod, therefore, the stability of the steel tube bent frame is not high enough, can appear the situation that the barred stone rolls to the periphery during blasting, damage or smash surrounding residents or blasting staff to the surrounding building;
meanwhile, the bottom ends of the vertical pipes of the steel pipe bent frames are fixed in concrete, so that the steel pipe bent frames are inconvenient to disassemble, the vertical pipes fixed in concrete may need to be sawed off, resource waste is caused, and the steel pipe bent frames are inconvenient to use again later; and there is no other protective measure outside the steel pipe bent, the barren rock will roll down along the steel pipe bent, destroy the surrounding building and injure the surrounding residents or blasting staff.
And to the technical problem that the rolling stone rolls everywhere and causes harm to resident around when blasting appears, the present disclosure patent 20202049629. X in disclose a safety protection high slope blasting's rolling stone device, including base and two fixed plates, one side of base is equipped with two fixed plates, the bottom of base and fixed plate has all welded a plurality of fixed pins, base and fixed plate are all fixed subaerial through the fixed pin, subaerial division has the ravines, the ravines is located one side that the fixed plate was kept away from to the base, the top one side welding of base has the fixed support board of perpendicular setting, the top rotation of fixed plate is connected with the cylinder, the piston rod rotation of cylinder is connected with the fixed support board, one side of fixed support board is equipped with the movable support board of perpendicular setting, movable support board sliding connection is on the base, be connected with a plurality of rubber pieces between fixed support board and the movable support board, the inside of rubber piece is opened has a plurality of cavitys, install first spring in the cavity. The utility model can prevent the rolling stones from falling down to cause harm to surrounding residents or buildings during blasting, improves the safety of the surrounding residents and the buildings, and has high stability. The device for protecting the surrounding residents from being damaged by rolling around the rolling stone adopted in the publication uses the air cylinder as a support, so that the cost is high, and the whole device is fixed on the ground by inserting the fixing pin into the ground, so that the installation and the disassembly of the device are inconvenient.
Therefore, there is a need to design a roller stone protection device with high stability and convenient assembly and disassembly.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the rolling stone protection net rack for the explosion area, which has the advantages of lower cost, convenient installation and disassembly and high safety, and can avoid the damage of rolling stones generated during explosion to surrounding residents.
In order to solve the problems, the utility model adopts the following technical scheme: the utility model provides a roll stone protection rack for explosion zone, including the stock, form the steel pipe rack of fixing in side slope one side by horizontal pole and montant fixed overlap joint, steel pipe rack's outside fixed mounting has close mesh net, still be fixed with first stock on the side slope of steel pipe rack montant fixed position, and be fixed with the second stock on the side slope of steel pipe rack both sides, the montant of steel pipe rack inserts the hole of first stock, second stock one end is fixed in the outside layer by layer of pouring of side slope upwards, the other end integrated into one piece has the lantern ring, the lantern ring internal fixation has wire rope's one end, wire rope's other end is fixed on steel pipe rack, the wooden raft has been placed to the bottom ground level in side slope one side, the montant bottom butt of bottommost is on the wooden raft.
The principle of the scheme is as follows:
through placing the wood raft on the ground of slope one side bottom, then fix the montant of steel pipe rack of bottom on the wood raft, make the installation of steel pipe rack be in on same horizontal plane, can not appear the slope, askew scheduling problem, and install other montants of steel pipe rack in the hole of the first stock of fixing in the side slope, accomplish the fixed overlap joint of montant, then fix the horizontal pole with the montant, one end withstands the rock of side slope mountain body when the overlap joint, the construction of steel pipe rack is formed, then use wire rope to pull the fastening of steel pipe rack on the second stock, then insert the second stock in the pouring layer of pouring layer by layer along the side slope outside, accomplish the fixing of steel pipe rack until pouring layer solidification, then the outside fixed mounting dense mesh net at the steel pipe rack, make the barred position of rolling out steel pipe rack that the rock that the blasting produced.
The beneficial effect that this scheme produced is:
1. the lowest end of the vertical rod of the steel pipe net rack is fixed on the wood raft, the bottom ends of other vertical rods are fixed in the inner hole of the first anchor rod, the wood raft can ensure the flatness of the fixed position of the steel pipe net rack, and meanwhile, the completed cross rod and the vertical rod can be detached when the steel pipe net rack is detached, so that rejection, resource waste and the like are avoided;
2. the dense mesh net is fixedly arranged on the outer side of the steel pipe net frame, so that the rolling stones can only roll in the shielding range of the dense mesh net, and the damage to surrounding residents or blasting staff is avoided;
3. the first anchor rod and the second anchor rod are adopted to fix the steel pipe net rack, the protection to the barren rock can be enhanced by fixedly installing the dense mesh net outside the steel pipe net rack, the structure is simple, the cost is low, the disassembly of the installation is convenient, and the barren rock can be prevented from rolling around to cause harm to surrounding residents.
Further, the length of the first anchor rod is 2.5-4m, and the anchoring length in the side slope is 2-3m. Ensure the stability of the first anchor rod, thereby ensuring the stability of the vertical rod inserted into the inner hole of the first anchor rod
Further, the length of the second anchor rod is 1.6-1.8m, and the anchoring length in the side slope is 1.4-1.5m. The stability of the second anchor rod is ensured, so that the stability of the steel pipe net frame fixed on the second anchor rod is ensured.
Further, the second anchor rod is anchored to a higher level than the steel wire rope is fixed to the steel pipe net frame. Under the action of the steel wire rope, the second anchor rod forms a pulling force on the steel pipe net rack, so that the steel pipe net rack is fastened with the side slope.
Further, a bamboo springboard is fixedly arranged on one side of the steel pipe net rack, which is close to the side slope. Flying stones generated during blasting are blocked by the bamboo springboard.
Further, a buffer sand bag is arranged between the bamboo springboard and the side slope. The impact force of the barren rock on the bamboo springboard during blasting is reduced.
Drawings
Fig. 1 is a schematic side view of a rolling stone protection net rack for an explosion zone.
Reference numerals in the drawings of the specification include: cross bar 101, vertical bar 102, bamboo springboard 103, dense mesh net 104, buffer sand bag 105, first anchor bar 106, second anchor bar 107, wood raft 108, and blasting area 201.
Detailed Description
The following is a further detailed description of the embodiments:
as shown in fig. 1, a concrete structure of the rolling stone protection net rack for the explosion area is as follows: before the steel pipe net frame is installed on one side of a side slope mountain body, a pouring layer is poured layer by layer along the outer side of the side slope, while pouring, the first anchor rods 106 and the second anchor rods 107 are inserted in the pouring layer, the first anchor rods 106 and the second anchor rods 107 are in one-to-one correspondence, the position of each second anchor rod 107 is higher than that of the corresponding first anchor rod 106, after the pouring layer is solidified, a wood raft 108 is placed on the ground at the bottom end of one side of the side slope mountain body, and the wood raft 108 is in a horizontal state; a steel pipe net rack is fixedly arranged on one side of a side slope mountain body, the steel pipe net rack is formed by fixedly lapping a cross rod 101 and a vertical rod 102, the cross rod 101 and the vertical rod 102 can be fixed by using a fastener, the bottom of the vertical rod 102 at the lowest end of the steel pipe net rack is fixed on a wood raft 108, the bottom ends of the rest vertical rods 102 are inserted into inner holes of a first anchor rod 106, the first anchor rod 106 is anchored in a pouring layer poured outside the side slope, the length of the first anchor rod 106 is 2.5-4m, the anchoring length of the first anchor rod 106 on the side slope is 2-3m, for example, the length of the first anchor rod 106 is 3m, and the anchoring length is 2.5m; the steel pipe net rack is anchored in a side slope through a first anchor rod 106 to fix the vertical rods 102, the cross rod 101 supports the rock of the side slope after the installation is completed, casting layers are cast outside the side slope mountain bodies on the two sides of the steel pipe net rack layer by layer, a second anchor rod 107 is anchored in the casting layers, the length of the second anchor rod 107 is 1.6-1.8m, the length of the second anchor rod 107 anchored in the casting layers is 1.4-1.5m, for example, the length of the second anchor rod 107 is 1.7m, and the anchoring length is 1.5m; one end of the second anchor rod 107 is anchored in the side slope mountain body, the other end of the second anchor rod is integrally formed with a lantern ring, and the second anchor rod 107 is tensioned between the steel pipe net rack and the lantern ring of the second anchor rod 107 through a steel wire rope, so that the stability of the steel pipe net rack is further enhanced.
The casting layer of the side slope outside layer by layer casting on both sides of the steel pipe net rack can be formed by casting concrete, namely, the second anchor rod 107 is anchored in the concrete, the stabilizing effect of the second anchor rod 107 on the steel pipe net rack is enhanced after the concrete is solidified, the second anchor rod 107 can be manufactured by adopting screw thread steel processing, for example, the second anchor rod 107 is manufactured by adopting screw thread steel processing with the length of 1.7M and the diameter of 28mm, one end of the second anchor rod 107 is processed into a lantern ring, the other end of the second anchor rod is inserted into an M25 cement mortar hole with the depth of 1.5M, and the anchoring of the second anchor rod 107 is achieved after the cement mortar is solidified.
The bamboo springboard 103 is fixedly arranged at the position of the vertical rod 102 of the steel pipe net rack close to one side of the slope mountain, the bamboo springboard 103 and the steel pipe net rack can be fixed through iron wires or wall penetrating bolts and the like, the buffer sand bags 105 are arranged between the bamboo springboard 103 nearest to the blasting area 201 and the slope mountain, the width of the buffer sand bags 105 can be 1 meter, the height of the buffer sand bags can be 1 meter, the length of the buffer sand bags is the same as the length of the slope, the buffer sand bags 105 move downwards along with the descending of the excavation elevation, namely the setting positions of the buffer sand bags 105 are synchronous with the position of the blasting area 201, the corresponding buffer sand bags 105 are arranged, if the excavation elevation descends for 1.5 meters, the buffer sand bags 105 move downwards once, and the buffer sand bags 105 gradually move downwards in the excavation process.
The distance between the vertical rods 102 of the steel pipe net frame is 1.5m, the distance between the transverse rods 101 is 2m, namely the density of the steel pipe net frame is 1.5mx1.5mx2 m, the steel pipe net frame is fastened on the lantern ring of the second anchor rod 107 by using a steel wire rope at the position of each vertical rod 102, and the position of the steel wire rope fixed on the steel pipe net frame exceeds the position of the second transverse rod 101; the vertical rods 102 are fixed together in 10 rows, so that the steel pipe net frame is composed of a plurality of small steel pipe net frames fixed together in 10 rows, and the installation and the disassembly are convenient.
The specific implementation process is as follows:
before fixing a steel pipe net rack on one side of a side slope mountain body, pouring a pouring layer outside the side slope layer by layer, anchoring a first anchor rod 106 and a second anchor rod 107 in the pouring layer while pouring, placing a wood raft 108 on the ground at the bottom end of the side slope after the pouring layer is completely solidified, fixing the lowest end of a vertical rod 102 of the steel pipe net rack on the wood raft 108, fixing a cross rod 101 and the vertical rod 102 by using fasteners when the cross rod and the vertical rod 102 are lapped into the steel pipe net rack, jacking one end of the cross rod 101 close to the side slope mountain body on the rock of the side slope when the cross rod 101 is installed, fixing a bamboo springboard 103 on the steel pipe net rack on one side of the steel pipe net rack close to the side slope mountain body by using screws or wall penetrating bolts after the steel pipe net rack is built, then arranging a buffer sand bag 105 between the bamboo springboard 103 closest to a blasting area 201 and the side slope mountain body, and fixedly installing a dense mesh net 104 on the outer side of the steel pipe net rack, namely installing a protective net.
When the blasting area 201 is blasted, the buffer sand bag 105 and the bamboo springboard 103 play a role of buffering and blocking the barren rock or the flying rock, so that the barren rock or the flying rock is prevented from being rolled down to cause harm to surrounding residents or blasting staff.
The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (6)
1. The utility model provides a roll stone protection rack for explosion zone, includes the stock, forms the steel pipe rack of fixing in side slope one side by horizontal pole and montant fixed overlap joint, its characterized in that: the steel pipe net rack is characterized in that a dense mesh net is fixedly arranged on the outermost side of the steel pipe net rack, a first anchor rod is further fixed on a side slope of a fixing position of a vertical rod of the steel pipe net rack, a second anchor rod is fixed on the side slope of two sides of the steel pipe net rack, the vertical rod of the steel pipe net rack is inserted into an inner hole of the first anchor rod, one end of the second anchor rod is fixed in a pouring layer of the side slope, which is poured upwards layer by layer, the other end of the second anchor rod is integrally formed with a lantern ring, one end of a steel wire rope is fixed in the lantern ring, the other end of the steel wire rope is fixed on the steel pipe net rack, a wood raft is horizontally placed on the ground at the bottom end of one side of the side slope, and the bottom end of the vertical rod at the lowest end is abutted to the wood raft.
2. The rolling stone protective net rack for explosion areas according to claim 1, wherein: the length of the first anchor rod is 2.5-4m, and the anchoring length in the side slope is 2-3m.
3. The rolling stone protective net rack for explosion areas according to claim 1, wherein: the length of the second anchor rod is 1.6-2m, and the anchoring length in the side slope is 1.3-1.5m.
4. The rolling stone protective net rack for explosion areas according to claim 1, wherein: the second anchor rod is anchored to a height higher than the fixed height of the steel wire rope and the steel pipe net frame.
5. The rolling stone protective net rack for explosion areas according to claim 1, wherein: and a bamboo springboard is fixedly arranged on one side of the steel pipe net rack, which is close to the side slope.
6. The rolling stone protective net rack for explosion areas according to claim 5, wherein: and a buffering sand bag is arranged between the bamboo springboard and the side slope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320760267.5U CN219604196U (en) | 2023-04-07 | 2023-04-07 | Roller stone protection net rack for explosion zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320760267.5U CN219604196U (en) | 2023-04-07 | 2023-04-07 | Roller stone protection net rack for explosion zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219604196U true CN219604196U (en) | 2023-08-29 |
Family
ID=87747304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320760267.5U Active CN219604196U (en) | 2023-04-07 | 2023-04-07 | Roller stone protection net rack for explosion zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219604196U (en) |
-
2023
- 2023-04-07 CN CN202320760267.5U patent/CN219604196U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105672517A (en) | Swing self-reset and self-standing type high-rise structure | |
| CN204898537U (en) | Half gentle semi -rigid hangar tunnel protective structure | |
| CN109778851A (en) | Multistage expansible supporting body pouch slip casting prestressed anchor construction method | |
| JP2014080847A (en) | Tsunami evacuation underground shelter | |
| CN219604196U (en) | Roller stone protection net rack for explosion zone | |
| CN209429141U (en) | Slope of highway composite protection structure | |
| CN104711931A (en) | Novel temporary underwater pier manufacturing, assembling and disassembling method suitable for bridge erection | |
| CN108798738B (en) | Movable suspension bone plate supporting structure for roadway | |
| CN111549804B (en) | Cutting slope reinforced passive protection system and construction method thereof | |
| CN210439301U (en) | Foundation section steel concrete waist rail supporting structure | |
| CN111395411A (en) | Be used for interim engineering pile foundation scour prevention device on water | |
| CN201459742U (en) | Arch-shaped protection system | |
| CN114016763B (en) | Independent type cave dwelling reinforcing system | |
| CN214168807U (en) | Rolling stone energy consumption slope body protection system | |
| CN213653839U (en) | Anti-seismic device for civil engineering | |
| CN211527221U (en) | Tunnel blasting protector convenient to dismouting | |
| JP5032255B2 (en) | Rockfall protection and avalanche prevention facility | |
| CN209211298U (en) | Grid steel construction keeps off stone walling | |
| CN206571503U (en) | Existing line safeguard structure | |
| CN110565664A (en) | Protective structure and treatment method for side slope inverted suspension | |
| CN205527412U (en) | Firm type tower crane that can prevent burglary | |
| CN220813901U (en) | High-steep side slope anti-rolling stone structure | |
| CN215169992U (en) | Protection device after blasting convenient to equipment and dismantlement | |
| CN219220482U (en) | Novel underground explosion-proof water bag frame for mine | |
| CN216008070U (en) | Foundation ditch safety arrangement that building engineering construction was used |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |