CN203515628U - Friction-type constant-resistance large-deformation anchor rod - Google Patents
Friction-type constant-resistance large-deformation anchor rod Download PDFInfo
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- CN203515628U CN203515628U CN201320617954.8U CN201320617954U CN203515628U CN 203515628 U CN203515628 U CN 203515628U CN 201320617954 U CN201320617954 U CN 201320617954U CN 203515628 U CN203515628 U CN 203515628U
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- anchor rod
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- 238000012856 packing Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 abstract description 28
- 230000008093 supporting effect Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The utility model provides a friction-type constant-resistance large-deformation anchor rod. The friction-type constant-resistance large-deformation anchor rod comprises a rod body, a tray and an external nut. A constant-resistance force-bearing sleeve pipe is arranged at the tail end of the rod body, the constant-resistance force-bearing sleeve pipe is sleeved with a friction sleeve and the tray and the external nut are sequentially installed at the tail end of the friction sleeve in a sleeved mode. The friction-type constant-resistance large-deformation anchor rod can automatically extend to main constant working resistance when large deformation occurs in surrounding rock of a roadway. Thus, the friction-type constant-resistance large-deformation anchor rod can absorb surrounding rock energy through constant-resistance large deformation so that a good supporting effect can still be achieved on the condition of large deformation of the surrounding rock so as to guarantee the stability of the roadway. The friction-type constant-resistance large-deformation anchor rod is simple in structure, stable in performance and convenient to use.
Description
Technical field
The utility model relates to a kind of tunnel or tunnel support apparatus, refers to especially a kind of friction-type constant resistance and large deformation anchor rod.
Background technology
When the underground engineering constructions such as mine engineering, Hydraulic and Hydro-Power Engineering or construction of tunnel, the deformation energy that the excavation of underground passage can make country rock produce discharges to free space.Along with the continuous increase of mining depth, roadway surrounding rock usually shows the feature of large deformation, is embodied in soft rock large deformation, rock burst large deformation, impacts large deformation or Gas Outburst large deformation etc.
Anchor pole or anchor cable, as the support apparatus most widely used in a kind of underground construction, consumption is maximum, can effectively regulate and control the supporting capacity of country rock self.But existing anchor pole, because self elongation per unit length is low, cannot meet the feature of country rock large deformation.When moderate finite deformation appears in country rock, because distortion initial stage energy is larger, the distortion of roadway surrounding rock exceeds the scope that anchor pole can bear, and will cause the support apparatus such as anchor pole to lose efficacy, and then cause the accidents such as fall of ground, landslide.For solving the supporting problem under country rock large deformation situation, need anchor pole to produce larger extensional with the distortion of suitable for surrounding rock in supporting initial stage tension, develop the anchor pole of a kind of high strength, high-elongation.
Utility model content
The utility model proposes a kind of friction-type constant resistance and large deformation anchor rod, to solve the problem that the elongation per unit length that existing anchor pole exists is low, can not meet roadway surrounding rock large deformation needs.
The technical solution of the utility model is achieved in that a kind of friction-type constant resistance and large deformation anchor rod, comprise the body of rod, pallet and outer nut, body of rod tail end is provided with constant-resistance load sleeve pipe, and constant-resistance load jacket exterior is set with friction sleeve, and pallet and outer nut are sleeved on friction sleeve tail end successively.
Preferably, body of rod tail end is provided with locking device, and friction sleeve tail end is provided with for the screw thread of outer nut is installed.
Preferably, constant-resistance load sleeve pipe and locking device are set in body of rod tail end successively; Locking device is specially inner nut block or lockset.
Preferably, constant-resistance load bushing outer surface is provided with screw thread, and screw thread is specially continuous trapezoid spiral screw thread or double helix screw thread.
Preferably, inner nut block external surface is provided with two symmetrical grooves, and described friction sleeve tube inner surface is corresponding is provided with two symmetrical projections.
Preferably, the body of rod is specially anchor cable, lockset is connected with anchor cable locking by lock lobe, the tail end of friction sleeve is provided with the hole of passing through for anchor cable, lockset is threaded connection in constant-resistance load sleeve pipe rear end in friction sleeve inner, lockset external surface is provided with two symmetrical projections, and friction sleeve tube inner surface is corresponding is provided with two symmetrical grooves.
Preferably, the interior forward end of friction sleeve is provided with friction stopper, and friction stopper is threaded connection with friction sleeve.
Preferably, friction stopper has chamfering.
Preferably, friction sleeve is specially the friction sleeve that is provided with anti-corrosion protection structure; Between pallet and outer nut, be provided with packing ring.
Inner nut block of the present utility model or lockset are the locking devices after the deformation of constant-resistance load sleeve pipe; Inner nut block or lockset external surface are provided with two symmetrical grooves or projection, and friction sleeve tube inner surface is corresponding is provided with two symmetrical projections or groove forms Spacing Rotating Structure.Constant-resistance load sleeve pipe and friction stopper interlock form constant-resistance deformation structure, and friction stopper is installed on the front end of friction sleeve, in anchor pole constant-resistance deformation process for constant-resistance load sleeve pipe is rubbed and stops to reach the constant-resistance effect of bolt deformation.Friction stopper is provided with chamfering, the guide structure of the coaxial friction of guiding constant-resistance load sleeve pipe.
Constant-resistance load sleeve pipe of the present utility model extends to outer distortion after anchor pole tension stress, and its maximal tensility is that the body of rod reaches yield strength elongation before.The outer screw thread arranging of constant-resistance load sleeve pipe is stressed with friction stopper interlock friction, is the size of anchor pole or anchor cable constant-resistance.
Constant-resistance load sleeve pipe of the present utility model, friction stopper, inner nut block or lockset are non-equal strength shape-changing material processing, the hardness of the screw thread material that the material hardness of friction stopper, inner nut block and lockset all arranges outward higher than constant-resistance load sleeve pipe.The tensile strength of the material that friction sleeve is used is higher than the tensile strength of the body of rod.
Theoretical based on roadway support, be applicable to the suspention broken and top board that top is stable of top board top layer theoretical theoretical with the compression arch that is applicable to weak broken top board, the utility model produces Automatic-drawing and surrouding rock deformation energy itself does not occur to destroy and discharge with deformation of the surrounding rock in tunnel, maintain constant working resistance to ensure the reliability of supporting intensity, the expanded range of permission is larger simultaneously.When constant-resistance load sleeve pipe is deformed by Surrounding Rock Movement, the constant working resistance of tension distortion selects the different controlled range of material different interval at 110～130KN, 120～140KN, 130～150KN etc. according to sleeve pipe, the factors such as the distortion size that specifically can allow according to roadway support condition, country rock and surrouding rock stress situation are determined.
The beneficial effects of the utility model are:
1) when roadway surrounding rock is subject to geostatic stress and mining influence generation roadway convergence, country rock large deformation, the utility model produces stretching thereupon, deformation energy in country rock is effectively discharged, after stretching, constant-resistance load sleeve pipe still can keep constant working resistance, realized the function of body of rod constant-resistance distortion, to country rock, provide lasting supporting power, thereby guaranteed the stable of roadway surrounding rock, eliminated the potential safety hazards such as the sudden roof fall that bolt support inefficacy causes, wall caving, landslide.
2) length range of the utility model constant-resistance load sleeve pipe is 30cm～60cm, and its tensile strength is less than anchor rod body part.When constant-resistance load sleeve pipe is deformed by Surrounding Rock Movement, the constant working resistance of tension distortion is under the qualified prerequisite of bolt support pretightning force, and the controlled range of anchor pole constant-resistance is a fixed interval (as 110～130kN), to adapt to the supporting of large deformation country rock.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is the partial enlarged drawing of the friction stopper shown in Fig. 1;
Fig. 3 is the partial enlarged drawing of the groove shown in Fig. 1;
Fig. 4 is the protruding partial enlarged drawing shown in Fig. 1;
Fig. 5 is the structural representation of another embodiment of the utility model;
Fig. 6 is the partial enlarged drawing of projection shown in Fig. 5;
Fig. 7 is the partial enlarged drawing of groove shown in Fig. 5;
In figure:
1, the body of rod; 1-1, anchor cable; 2, friction sleeve; 21, friction stopper; 22, projection; 22-1, groove; 3, constant-resistance load sleeve pipe; 31, screw thread; 4, pallet; 5, outer nut; 6, inner nut block; 61, groove; 61-1, projection; 6-1, lockset; 7, packing ring.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Fig. 1～4, the utility model comprises the body of rod 1, friction sleeve 2, constant-resistance load sleeve pipe 3, pallet 4, outer nut 5 and inner nut block 6, constant-resistance load sleeve pipe 3, inner nut block 6 are set in the body of rod 1 tail end successively, inner nut block 6 is connected with the body of rod 1 by the body of rod 1 tail end screw thread, friction sleeve 2 is set in constant-resistance load sleeve pipe 3 outsides, and pallet 4 and outer nut 5 are sleeved on friction sleeve 2 tail ends successively.The interior part of friction sleeve 2 is smooth shape, and outer part is rough-shape; The interior forward end position of friction sleeve 2 is provided with friction stopper 21, and friction stopper 21 is threaded connection with friction sleeve 2.Constant-resistance load sleeve pipe 3 external surfaces are provided with screw thread 31.
During original state, constant-resistance load sleeve pipe 3 is tightly set in the body of rod 1 outside by inner nut block 6, and during the whole tension of anchor pole, screw thread 31 is stressed with the 21 interlock frictions of friction stopper.When outside axial tension is greater than frictional force between stopper 21 of screw thread 31 and friction, friction stopper 21 friction screw threads 31 outwards move, the body of rod 1 with rub between sleeve 2 with constant frictional resistance generation relative displacement; When outside axial tension be less than or and screw thread 31 and the frictional force of friction between stopper 21 while maintaining an equal level, the body of rod 1 with rub relative static between sleeve 2; When friction stopper 21 moves to the body of rod 1 termination, inner nut block 6 blocks with 21 lockings of friction stopper, and constant resistance and large deformation anchor rod reaches range.Along with the distortion of country rock, when constant-resistance load sleeve pipe 3 reaches limit of stretch, friction sleeve 2 friction constant-resistance load sleeve pipes 3 extend in tunnel, have good constant resistance and large deformation effect, can guarantee the stable of roadway support.
In order to realize to the utility model anchor pole, apply prestressed function, inner nut block 6 external surfaces are provided with two symmetrical grooves 61, friction sleeve 2 inner surfaces are corresponding is provided with two symmetrical projections 22, during installation, groove 61 blocks projection 22, when sleeve rotates, anchor pole synchronously rotates with sleeve, so that applying anchor pole integral pre-tightening power.Friction stopper 21 has chamfering.The material hardness of friction stopper 21 and inner nut block 6 is all higher than the hardness of screw thread 31 materials.The tensile strength of the material that friction sleeve 2 is used is higher than the tensile strength of the body of rod 1.Screw thread 31 is specially continuous trapezoid spiral screw thread or double helix screw thread.Friction sleeve 2 is specially the friction sleeve that is provided with anti-corrosion protection structure; Between pallet 4 and outer nut 5, be provided with packing ring 7.
As shown in Fig. 5～7, the utility model comprises anchor cable 1-1, friction sleeve 2, constant-resistance load sleeve pipe 3, pallet 4, outer nut 5 and lockset 6-1.Constant-resistance load sleeve pipe 3 is set in anchor cable 1-1 tail end with lockset 6-1, lockset 6-1 is connected with anchor cable 1-1 locking by lock lobe, friction sleeve 2 is set in constant-resistance load sleeve pipe 3 outsides, sleeve 2 tail ends that wherein rub have penetrating hole to pass for anchor cable 1-1, the interior forward end of friction sleeve 2 is provided with friction stopper 21, friction stopper 21 is threaded connection with friction sleeve 2, and pallet 4 and outer nut 5 are connected to the tail end of friction sleeve 2 in turn.Constant-resistance load sleeve pipe 3 external surfaces are provided with screw thread 31.
During original state, it is outside that constant-resistance load sleeve pipe 3 is tightly set in anchor cable 1-1 by lockset 6-1, and during the whole tension of anchor cable 1-1, screw thread 31 is stressed with the 21 interlock frictions of friction stopper.When outside axial tension is greater than frictional force between stopper 21 of screw thread 31 and friction, friction stopper 21 friction screw threads 31 outwards move, anchor cable 1-1 with rub between sleeve 2 with constant frictional resistance generation relative displacement; When outside axial tension be less than or and screw thread 31 and the frictional force of friction between stopper 21 while maintaining an equal level, anchor cable 1-1 with rub relative static between sleeve 2; When friction stopper 21 moves to anchor cable 1 termination, lockset 6-1 blocks with 21 lockings of friction stopper, and constant resistance and large deformation anchor cable reaches range.
The utility model is in order to realize the function that resin explosive roll is stirred, the tail end of sleeve 2 of rubbing is as shown in Figure 7 provided with the hole of passing through for anchor cable 1-1, lockset 6-1 is arranged on friction sleeve 2 inside, be positioned at constant-resistance load sleeve pipe 3 rear ends, friction sleeve 2 tail end external surfaces are carved with screw thread, for the installation of pallet 4 and outer nut 5, during installation, anchor cable 1-1 rotates, to resin explosive roll is stirred.
In order to realize the utility model, apply prestressed function, lockset 6-1 external surface is provided with two symmetrical protruding 61-1, and friction sleeve 2 inner surfaces are corresponding is provided with two symmetrical groove 22-1; Lockset 6-1 is threaded connection with friction sleeve 2.Screw thread 31 is specially continuous trapezoid spiral screw thread or double helix screw thread.Friction sleeve 2 is specially the friction sleeve that is provided with anti-corrosion protection structure; Between pallet 4 and outer nut 5, be provided with packing ring 7.
The utility model is equally applicable to be enclosed within anchor cable outside and carries out soft rock large deformation supporting, and the constant-resistance deformation device that is enclosed within anchor cable outside of similar structures type belongs in this patent protection category field equally.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. a friction-type constant resistance and large deformation anchor rod, comprise the body of rod (1), pallet (4) and outer nut (5), it is characterized in that, the described body of rod (1) tail end is provided with constant-resistance load sleeve pipe (3), described constant-resistance load sleeve pipe (3) outer cover is equipped with friction sleeve (2), and described pallet (4) and outer nut (5) are sleeved on described friction sleeve (2) tail end successively.
2. a kind of friction-type constant resistance and large deformation anchor rod according to claim 1, is characterized in that, the described body of rod (1) tail end is provided with locking device, and described friction sleeve (2) tail end is provided with for the screw thread of described outer nut (5) is installed.
3. a kind of friction-type constant resistance and large deformation anchor rod according to claim 2, is characterized in that, described constant-resistance load sleeve pipe (3) and described locking device are set in the described body of rod (1) tail end successively; Described locking device is specially inner nut block (6) or lockset (6-1).
4. a kind of friction-type constant resistance and large deformation anchor rod according to claim 3, is characterized in that, described constant-resistance load sleeve pipe (3) external surface is provided with screw thread (31), and described screw thread (31) is specially continuous trapezoid spiral screw thread or double helix screw thread.
5. a kind of friction-type constant resistance and large deformation anchor rod according to claim 4, it is characterized in that, described inner nut block (6) external surface is provided with two symmetrical grooves (61), corresponding two the symmetrical projections (22) that are provided with of described friction sleeve (2) inner surface.
6. a kind of friction-type constant resistance and large deformation anchor rod according to claim 4, it is characterized in that, the described body of rod (1) is specially anchor cable (1-1), described lockset (6-1) is connected with described anchor cable (1-1) locking by lock lobe, the tail end of described friction sleeve (2) is provided with the hole of passing through for described anchor cable (1-1), described lockset (6-1) is threaded connection in described friction sleeve (2) inside in described constant-resistance load sleeve pipe (3) rear end, described lockset (6-1) external surface is provided with two symmetrical projections (61-1), corresponding two the symmetrical grooves (22-1) that are provided with of friction sleeve (2) inner surface.
7. according to a kind of friction-type constant resistance and large deformation anchor rod described in claim 1～6 any one, it is characterized in that, the interior forward end of described friction sleeve (2) is provided with friction stopper (21), and described friction stopper (21) is threaded connection with described friction sleeve (2).
8. a kind of friction-type constant resistance and large deformation anchor rod according to claim 7, is characterized in that, described friction stopper (21) has chamfering.
9. a kind of friction-type constant resistance and large deformation anchor rod according to claim 8, is characterized in that, described friction sleeve (2) is specially the friction sleeve (2) that is provided with anti-corrosion protection structure; Between described pallet (4) and described outer nut (5), be provided with packing ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617954.8U CN203515628U (en) | 2013-10-08 | 2013-10-08 | Friction-type constant-resistance large-deformation anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617954.8U CN203515628U (en) | 2013-10-08 | 2013-10-08 | Friction-type constant-resistance large-deformation anchor rod |
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| CN203515628U true CN203515628U (en) | 2014-04-02 |
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| CN201320617954.8U Expired - Lifetime CN203515628U (en) | 2013-10-08 | 2013-10-08 | Friction-type constant-resistance large-deformation anchor rod |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033169A (en) * | 2014-06-03 | 2014-09-10 | 尤洛卡矿业安全工程股份有限公司 | Impact-resistant constant-resistance anchor cable |
| CN104100286A (en) * | 2014-08-01 | 2014-10-15 | 中国科学院、水利部成都山地灾害与环境研究所 | Anchor rod/anchor cable with constant resistance and large deformation and design method thereof |
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN104895597A (en) * | 2015-01-30 | 2015-09-09 | 湖南科技大学 | Large-deformation constant-resistance periodic yielding bolt |
| CN104963710A (en) * | 2015-07-16 | 2015-10-07 | 尤洛卡（山东）深部地压防治安全技术有限公司 | Hollow grouting anchor rod with anti-shock constant-resistance performance and using method thereof |
| CN105736025A (en) * | 2016-02-02 | 2016-07-06 | 重庆大学 | Anti-breakage anchor rod |
| CN107829768A (en) * | 2017-10-23 | 2018-03-23 | 山东建筑大学 | It is a kind of can explosion expand the Large Deformation Support device and technique of anchor structure automatically |
| CN111456784A (en) * | 2020-04-20 | 2020-07-28 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
| CN112211656A (en) * | 2020-10-16 | 2021-01-12 | 青岛理工大学 | Prestressed constant-resistance grouting anchor rod device and working method |
| WO2021052192A1 (en) * | 2019-09-19 | 2021-03-25 | 孟波 | High stress rock burst roadway bolt, design method and working method |
| CN112901228A (en) * | 2021-02-07 | 2021-06-04 | 山东科技大学 | Rotary friction type constant-resistance large-deformation anchor rod |
| CN112922654A (en) * | 2021-03-31 | 2021-06-08 | 泰安泰烁岩层控制科技有限公司 | Novel outer expansion friction type constant-resistance energy-absorbing anchor rod and use method thereof |
| CN112922652A (en) * | 2021-03-01 | 2021-06-08 | 华能煤炭技术研究有限公司 | Hierarchical tensile anchor rod and supporting system |
| CN112943329A (en) * | 2021-03-18 | 2021-06-11 | 山西华廷精诚科技有限公司 | Anti-corrosion constant-resistance device |
-
2013
- 2013-10-08 CN CN201320617954.8U patent/CN203515628U/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033169A (en) * | 2014-06-03 | 2014-09-10 | 尤洛卡矿业安全工程股份有限公司 | Impact-resistant constant-resistance anchor cable |
| CN104100286A (en) * | 2014-08-01 | 2014-10-15 | 中国科学院、水利部成都山地灾害与环境研究所 | Anchor rod/anchor cable with constant resistance and large deformation and design method thereof |
| CN104100286B (en) * | 2014-08-01 | 2017-03-29 | 中国科学院、水利部成都山地灾害与环境研究所 | A kind of constant resistance and large deformation anchor rod/anchor cable and its method for designing |
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN104373145B (en) * | 2014-11-04 | 2016-08-17 | 中国矿业大学 | Embedded classification constant-resistance shearing resistance large deformation anchor and method |
| CN104895597B (en) * | 2015-01-30 | 2017-07-28 | 湖南科技大学 | A kind of large deformation constant-resistance periodicity pressure-relieving achor bar |
| CN104895597A (en) * | 2015-01-30 | 2015-09-09 | 湖南科技大学 | Large-deformation constant-resistance periodic yielding bolt |
| CN104963710A (en) * | 2015-07-16 | 2015-10-07 | 尤洛卡（山东）深部地压防治安全技术有限公司 | Hollow grouting anchor rod with anti-shock constant-resistance performance and using method thereof |
| CN105736025B (en) * | 2016-02-02 | 2019-03-19 | 重庆大学 | A kind of anchor pole that tension is disconnected |
| CN105736025A (en) * | 2016-02-02 | 2016-07-06 | 重庆大学 | Anti-breakage anchor rod |
| CN107829768A (en) * | 2017-10-23 | 2018-03-23 | 山东建筑大学 | It is a kind of can explosion expand the Large Deformation Support device and technique of anchor structure automatically |
| CN107829768B (en) * | 2017-10-23 | 2023-07-18 | 山东建筑大学 | Large-deformation supporting device and process capable of blasting automatic expansion anchoring structure |
| WO2021052192A1 (en) * | 2019-09-19 | 2021-03-25 | 孟波 | High stress rock burst roadway bolt, design method and working method |
| CN111456784A (en) * | 2020-04-20 | 2020-07-28 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
| CN111456784B (en) * | 2020-04-20 | 2021-01-08 | 北京中矿创新联盟能源环境科学研究院 | Constant-resistance anchor cable structure and anchoring method |
| CN112211656A (en) * | 2020-10-16 | 2021-01-12 | 青岛理工大学 | Prestressed constant-resistance grouting anchor rod device and working method |
| CN112211656B (en) * | 2020-10-16 | 2022-06-21 | 青岛理工大学 | Prestressed constant-resistance grouting anchor rod device and working method |
| CN112901228A (en) * | 2021-02-07 | 2021-06-04 | 山东科技大学 | Rotary friction type constant-resistance large-deformation anchor rod |
| CN112922652A (en) * | 2021-03-01 | 2021-06-08 | 华能煤炭技术研究有限公司 | Hierarchical tensile anchor rod and supporting system |
| CN112943329A (en) * | 2021-03-18 | 2021-06-11 | 山西华廷精诚科技有限公司 | Anti-corrosion constant-resistance device |
| CN112922654A (en) * | 2021-03-31 | 2021-06-08 | 泰安泰烁岩层控制科技有限公司 | Novel outer expansion friction type constant-resistance energy-absorbing anchor rod and use method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |