CN110219683A - A kind of coal mine clamped protection unit of sloping mining approach alley way anchor - Google Patents
A kind of coal mine clamped protection unit of sloping mining approach alley way anchor Download PDFInfo
- Publication number
- CN110219683A CN110219683A CN201910499067.7A CN201910499067A CN110219683A CN 110219683 A CN110219683 A CN 110219683A CN 201910499067 A CN201910499067 A CN 201910499067A CN 110219683 A CN110219683 A CN 110219683A
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- China
- Prior art keywords
- anchor
- coal mine
- anchoring
- layer
- mining approach
- 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.)
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- 239000003245 coal Substances 0.000 title claims abstract description 59
- 238000005065 mining Methods 0.000 title claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims abstract description 53
- 239000011435 rock Substances 0.000 claims abstract description 36
- 230000008093 supporting effect Effects 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 3
- 238000005345 coagulation Methods 0.000 claims 3
- 239000000725 suspension Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of coal mine clamped protection units of sloping mining approach alley way anchor, it is related to technical field of coal mine equipment, the present invention is by the way of spraying anchor, it can improve very well and realize that the anchoring to coal rock layer is handled, even for the pitching exploitation of some soft rocks, also it can realize well that anchoring is handled using concrete anchor layer, simultaneously, the angle of expanding plate of the invention can be adjusted by the connection between connecting column, in this way, it is adapted to the anchoring of different pitching exploitation angles, anchoring property is good, it can guarantee the supporting power in sloping mining approach tunnel, improve supporting stability and safety, the setting of expanding plate, supporting tension can be carried out to anchor pole from multiple angles, guarantee supporting power, the problems such as preventing collapsing.
Description
Technical field
The present invention relates to technical field of coal mine equipment, specifically a kind of coal mine clamped protection unit of sloping mining approach alley way anchor.
Background technique
Anchoring support is that a kind of ground is actively reinforced and stabilization technique, as the anchor pole (rope) of its technological subject, one end anchor
Enter in stable soil (rock) body, the other end is connect with various forms of supporting construction objects, is acted on by the tension of the body of rod, is called deep
The potential on portion stratum, achievees the purpose that foundation pit and building stability.But common support pattern comes sloping mining approach tunnel
Say, it is difficult to reach preferable supporting effect, and if inclined gallery road supporting of bowing it is bad, it is easy to the phenomenon that collapsing, especially
It is the oblique roadway support of bowing of high inclination-angle, the supporting of coal mine rock stratum is most important.
Therefore, the present invention provides a kind of coal mine clamped protection units of sloping mining approach alley way anchor, to solve above-mentioned background skill
The problem of being proposed in art.
Summary of the invention
The purpose of the present invention is to provide a kind of coal mine clamped protection units of sloping mining approach alley way anchor, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of coal mine clamped protection unit of sloping mining approach alley way anchor, including anchoring assembly, shot anchor net and outer protective net,
In, it is protruded into coal mine rock stratum on the inside of the anchor pole of each anchoring assembly, the outside of the anchoring assembly is located at the coal mine rock
Layer is outer, which is characterized in that the outer surface spraying of the coal mine rock stratum is provided with a layer concrete anchor layer, the concrete anchoring
It is provided with the shot anchor net in layer, institute's shot anchor net is connect with the end of the anchoring assembly, the appearance of the concrete anchor layer
Face also fixation is equipped with one layer of outer protective net；
It is additionally provided with multiple expanding plates on the outside of each anchoring assembly, each expanding plate is from the coal mine rock stratum
Inside is extended in the concrete anchor layer with the angle direction of diffusion outward.
Further, preferably, each anchoring assembly protrudes into the difference of the angle in the coal rock layer.
Further, preferably, the anchoring assembly includes anchor pole, hollow anchor post and is fixedly connected with disk, wherein the sky
One end of heart anchor post is protruded into coal rock layer, and the other side of the hollow anchor post is located in the concrete anchor layer, described
The other side of hollow anchor post is provided with external screw thread, is fixedly connected with disk described in threaded connection on the external screw thread, described to be fixedly connected
Disk abuts against the coal rock layer surface, and the anchor pole is protruded into out of the hollow anchor post centre bore.
Further, preferably, each expansion chip arrays setting is fixedly connected on disk described, and the expanding plate
It is hinged to be arranged on connecting column, the connecting column be fixedly connected on it is described be fixedly connected on disk, the extending direction of the connecting column
There is the angle of an acute angle with the extending direction of the hollow anchor post.
Further, preferably, each anchoring assembly includes-a expanding plate.
Further, preferably, the anchoring support device further includes anchor cable, anchor cable setting two anchoring assemblies it
Between.
Further, preferably, the shot anchor net is reticulated metal structures.
Further, preferably, being provided with coarse slot on the surface of the expanding plate.
Further, the present invention also provides a kind of coal mine sloping mining approach tunnel anchoring support methods, which is characterized in that its
Include the following steps；
(1) it is drilled with anchor hole on the coal cinder lithosphere in sloping mining approach tunnel, and in the position reaming of anchor hole, reaming
Depth is less than the length of hollow anchor post；
(2) it is inserted into anchor rod anchored in anchor hole, and hollow anchor post is set on the anchor pole, and make hollow anchor
Column protrudes into reaming, and is fixedly connected with disk in the connection of the outer end screw-threaded coupling of hollow anchor post, realizes anchor using disk is fixedly connected with
The preload of bar and hollow anchor post is handled；
(3) anchoring sealing is carried out to the anchor pole and hollow anchor post using Anchor Agent；
(4) angle of expanding plate is adjusted, then shot anchor net is fixedly connected on each expanding plate, and fixes；
(5) anchored concrete slurry spray is anchored at the coal rock layer surface, and by the shot anchor net set on described
In concrete grout, and one layer of outer protective net is attached in the outer surface of anchored concrete slurry；
(6) anchoring support that coal rock layer can be completed after anchored concrete starches solidification anchoring well utilizes branch later
It protects bracket and supporting roof and the supporting of emphasis position is carried out to the outer protective net.
Further, preferably, being also drilled with anchor cable hole in the step (1), in the step (2), further include by
Anchor cable, which protrudes into, carries out the step of anchor cable fixes supporting in the anchor cable hole.
Compared with prior art, the beneficial effects of the present invention are:
The present invention can improve very well by the way of spraying anchor and realize that the anchoring to coal rock layer is handled, even for
The pitching of some soft rocks is exploited, and can also realize well that anchoring is handled using concrete anchor layer, meanwhile, expansion of the invention
The angle of piece can be adjusted by the connection between connecting column, in this way, being adapted to the anchoring of different pitching exploitation angles, anchor
Solidity can be good, it is ensured that the supporting power in sloping mining approach tunnel improves supporting stability and safety, and the setting of expanding plate can
The problems such as to carry out supporting tension to anchor pole from multiple angles, guarantee supporting power, prevent collapsing.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of clamped protection unit of coal mine sloping mining approach alley way anchor；
Fig. 2 is a kind of mounting structure schematic diagram of expanding plate in clamped protection unit of coal mine sloping mining approach alley way anchor；
Specific embodiment
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of coal mine clamped protection unit of sloping mining approach alley way anchor, including anchor
Gu component, shot anchor net 6 and outer protective net 7, wherein it is protruded into coal mine rock stratum on the inside of the anchor pole of each anchoring assembly, it is described
The outside of anchoring assembly is located at outside the coal mine rock stratum, which is characterized in that the outer surface spraying of the coal mine rock stratum is provided with one
Layer concrete anchor layer 5 is provided with the shot anchor net 6, institute's shot anchor net 6 and the anchoring assembly in the concrete anchor layer 5
End connection, the outer surface of the concrete anchor layer also fixation is equipped with one layer of outer protective net 7；
It is additionally provided with multiple expanding plates 4 on the outside of each anchoring assembly, each expanding plate is from the coal mine rock
Layer inside is extended in the concrete anchor layer with the angle direction of diffusion outward.
In the present invention, each anchoring assembly protrudes into the difference of the angle in the coal rock layer, in this way, can be from
Different angles realizes the anchoring support to tunnel.
As preferred embodiment, the anchoring assembly includes anchor pole 1, hollow anchor post 2 and is fixedly connected with disk 3, wherein institute
The one end for stating hollow anchor post 2 is protruded into coal rock layer, and the other side of the hollow anchor post 2 is located at the concrete anchor layer 5
Interior, the other side of the hollow anchor post is provided with external screw thread, is fixedly connected with disk 3 described in threaded connection on the external screw thread, described
It is fixedly connected with disk 3 and abuts against the coal rock layer surface, the anchor pole 1 is protruded into out of the hollow anchor post 2 centre bore 8.
Wherein, each expansion chip arrays setting is fixedly connected on disk described, and the expanding plate is hingedly arranged in
On connecting column 9, the connecting column 9 be fixedly connected on it is described be fixedly connected on disk, the extending direction of the connecting column and the sky
The extending direction of heart anchor post has the angle of an acute angle.
In the present invention, each anchoring assembly includes 4-8 expanding plate 4, and specific to the present embodiment, the present embodiment is
4.
In addition, the anchoring support device further includes anchor cable 10 in order to improve support capacity, the anchor cable 10 is arranged at two
Between anchoring assembly.The shot anchor net 6 is reticulated metal structures.Coarse slot is provided on the surface of the expanding plate 4.
The present invention also provides a kind of coal mine sloping mining approach tunnel anchoring support methods, which is characterized in that it include with
Lower step；
(1) it is drilled with anchor hole on the coal cinder lithosphere in sloping mining approach tunnel, and in the position reaming of anchor hole, reaming
Depth is less than the length of hollow anchor post 2；
(2) it is inserted into anchor hole, and hollow anchor post 2 is set on the anchor pole, and make anchor rod anchored hollow
Anchor post protrudes into reaming, and is fixedly connected with disk 3 in the connection of the outer end screw-threaded coupling of hollow anchor post, real using disk 3 is fixedly connected with
The preload processing of existing anchor pole and hollow anchor post；
(3) anchoring sealing is carried out to the anchor pole and hollow anchor post using Anchor Agent；
(4) angle of expanding plate is adjusted, then shot anchor net 6 is fixedly connected on each expanding plate, and fixes；
(5) anchored concrete slurry spray is anchored at the coal rock layer surface, and by the shot anchor net set on described
In concrete grout, and one layer of outer protective net 7 is attached in the outer surface of anchored concrete slurry；
(6) anchoring support that coal rock layer can be completed after anchored concrete starches solidification anchoring well utilizes branch later
It protects bracket and supporting roof and the supporting of emphasis position is carried out to the outer protective net.
Wherein, in the present embodiment, it is also drilled with anchor cable hole in the step (1), in the step (2), further includes
Anchor cable is protruded into and carries out the step of anchor cable fixes supporting in the anchor cable hole.
The present invention can improve very well by the way of spraying anchor and realize that the anchoring to coal rock layer is handled, even for
The pitching of some soft rocks is exploited, and can also realize well that anchoring is handled using concrete anchor layer, meanwhile, expansion of the invention
The angle of piece can be adjusted by the connection between connecting column, in this way, being adapted to the anchoring of different pitching exploitation angles, anchor
Solidity can be good, it is ensured that the supporting power in sloping mining approach tunnel improves supporting stability and safety, and the setting of expanding plate can
The problems such as to carry out supporting tension to anchor pole from multiple angles, guarantee supporting power, prevent collapsing.
It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of coal mine clamped protection unit of sloping mining approach alley way anchor, including anchoring assembly, shot anchor net (6) and outer protective net (7),
Wherein, it is protruded into coal mine rock stratum on the inside of the anchor pole of each anchoring assembly, the outside of the anchoring assembly is located at the coal mine
Outside rock stratum, which is characterized in that the outer surface spraying of the coal mine rock stratum is provided with a layer concrete anchor layer (5), the coagulation
It is provided with the shot anchor net (6) in native anchor layer (5), institute's shot anchor net (6) is connect with the end of the anchoring assembly, the coagulation
The also fixation of the outer surface of native anchor layer is equipped with one layer of outer protective net (7)；
It is additionally provided on the outside of each anchoring assembly multiple expanding plates (4), each expanding plate is from the coal mine rock stratum
Inside is extended in the concrete anchor layer with the angle direction of diffusion outward.
2. a kind of coal mine according to claim 1 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that Ge Gesuo
It is different to state the angle that anchoring assembly protrudes into the coal rock layer.
3. a kind of coal mine according to claim 1 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that the anchor
Gu component includes anchor pole (1), hollow anchor post (2) and is fixedly connected with disk (3), wherein coal is protruded into one end of the hollow anchor post (2)
In ore-rock rock layers, the other side of the hollow anchor post (2) is located in the concrete anchor layer (5), the hollow anchor post it is another
Side is provided with external screw thread, be threadedly coupled on the external screw thread described in be fixedly connected disk (3), it is described be fixedly connected disk (3) against
Coal rock layer surface is stated in residence, and the anchor pole (1) is protruded into out of the hollow anchor post (2) centre bore (8).
4. a kind of coal mine according to claim 1 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that Ge Gesuo
It states expansion chip arrays setting to be fixedly connected on disk described, and the expanding plate is hingedly arranged on connecting column (9), the connection
Column (9) is fixedly connected on disk described in being fixedly connected on, the extending direction of the extending direction of the connecting column and the hollow anchor post
Angle with an acute angle.
5. a kind of coal mine according to claim 1 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that Mei Gesuo
Stating anchoring assembly includes 4-8 expanding plate (4).
6. a kind of coal mine according to claim 3 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that the anchoring
Suspension device further includes anchor cable (10), and the anchor cable (10) is arranged between two anchoring assemblies.
7. a kind of coal mine according to claim 3 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that the spray
Anchor net (6) is reticulated metal structures.
8. a kind of coal mine according to claim 3 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that the expansion
It opens and is provided with coarse slot on the surface of piece (4).
9. a kind of coal mine sloping mining approach tunnel anchoring support method, which is characterized in that it uses claim 1-8 any one
A kind of coal mine clamped protection unit of sloping mining approach alley way anchor comprising following steps；
(1) anchor hole is drilled on the coal cinder lithosphere in sloping mining approach tunnel, and in the position reaming of anchor hole, the depth of reaming
Less than the length of hollow anchor post (2)；
(2) it is inserted into anchor hole, and hollow anchor post (2) is set on the anchor pole, and make hollow anchor for anchor rod anchored
Column protrudes into reaming, and is fixedly connected with disk (3) in the connection of the outer end screw-threaded coupling of hollow anchor post, using being fixedly connected with disk (3)
Realize the preload processing of anchor pole and hollow anchor post；
(3) anchoring sealing is carried out to the anchor pole and hollow anchor post using Anchor Agent；
(4) angle of expanding plate is adjusted, then shot anchor net (6) is fixedly connected on each expanding plate, and fixes；
(5) anchored concrete slurry spray is anchored at the coal rock layer surface, and the shot anchor net is set to the coagulation
In soil paste, and one layer of outer protective net (7) is attached in the outer surface of anchored concrete slurry；
(6) anchoring support that coal rock layer can be completed after anchored concrete starches solidification anchoring well utilizes supporting branch later
Frame and supporting roof carry out the supporting of emphasis position to the outer protective net.
10. a kind of coal mine according to claim 9 clamped protection unit of sloping mining approach alley way anchor, which is characterized in that in institute
It states in step (1) and is also drilled with anchor cable hole, further include protruding into anchor cable to carry out anchor cable in the anchor cable hole in the step (2)
The step of fixed supporting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499067.7A CN110219683B (en) | 2019-06-10 | 2019-06-10 | Anchoring and supporting device for coal mine downward-inclined mining roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499067.7A CN110219683B (en) | 2019-06-10 | 2019-06-10 | Anchoring and supporting device for coal mine downward-inclined mining roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110219683A true CN110219683A (en) | 2019-09-10 |
| CN110219683B CN110219683B (en) | 2020-09-29 |
Family
ID=67816164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910499067.7A Active CN110219683B (en) | 2019-06-10 | 2019-06-10 | Anchoring and supporting device for coal mine downward-inclined mining roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110219683B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202745898U (en) * | 2012-03-19 | 2013-02-20 | 新汶矿业集团有限责任公司协庄煤矿 | Deep soft rock tunnel tensile reinforced concrete spraying body supporting structure |
| CN204238216U (en) * | 2014-11-28 | 2015-04-01 | 海南大学 | A kind of anchor pole |
| CN206092019U (en) * | 2016-10-10 | 2017-04-12 | 安徽理工大学 | A compound anchor net for administering distension at bottom of deep well soft rock roadway under high stress |
| CN206280090U (en) * | 2016-12-23 | 2017-06-27 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility |
| CN206495685U (en) * | 2017-02-18 | 2017-09-15 | 北京东地岩土工程有限公司 | A kind of anchor pole and its prestressed structure |
| CN206889003U (en) * | 2017-06-30 | 2018-01-16 | 闫捷 | A kind of roadway support anti-loosening anchor rod |
| CN208203746U (en) * | 2018-05-08 | 2018-12-07 | 福州百益百利自动化科技有限公司 | A kind of combined structure formula anchor bolt |
| CN109505283A (en) * | 2018-11-23 | 2019-03-22 | 陈亮 | A kind of construction method of river channel ecology slope protection |
| CN208831032U (en) * | 2018-08-09 | 2019-05-07 | 马俊辉 | High strength anchor bar is used in anchoring outside a kind of |
-
2019
- 2019-06-10 CN CN201910499067.7A patent/CN110219683B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202745898U (en) * | 2012-03-19 | 2013-02-20 | 新汶矿业集团有限责任公司协庄煤矿 | Deep soft rock tunnel tensile reinforced concrete spraying body supporting structure |
| CN204238216U (en) * | 2014-11-28 | 2015-04-01 | 海南大学 | A kind of anchor pole |
| CN206092019U (en) * | 2016-10-10 | 2017-04-12 | 安徽理工大学 | A compound anchor net for administering distension at bottom of deep well soft rock roadway under high stress |
| CN206280090U (en) * | 2016-12-23 | 2017-06-27 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility |
| CN206495685U (en) * | 2017-02-18 | 2017-09-15 | 北京东地岩土工程有限公司 | A kind of anchor pole and its prestressed structure |
| CN206889003U (en) * | 2017-06-30 | 2018-01-16 | 闫捷 | A kind of roadway support anti-loosening anchor rod |
| CN208203746U (en) * | 2018-05-08 | 2018-12-07 | 福州百益百利自动化科技有限公司 | A kind of combined structure formula anchor bolt |
| CN208831032U (en) * | 2018-08-09 | 2019-05-07 | 马俊辉 | High strength anchor bar is used in anchoring outside a kind of |
| CN109505283A (en) * | 2018-11-23 | 2019-03-22 | 陈亮 | A kind of construction method of river channel ecology slope protection |
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| Publication number | Publication date |
|---|---|
| CN110219683B (en) | 2020-09-29 |
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