CN201981537U - Water expansion type elastic anchor rod for resisting rock burst - Google Patents
Water expansion type elastic anchor rod for resisting rock burst Download PDFInfo
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- CN201981537U CN201981537U CN201020684957XU CN201020684957U CN201981537U CN 201981537 U CN201981537 U CN 201981537U CN 201020684957X U CN201020684957X U CN 201020684957XU CN 201020684957 U CN201020684957 U CN 201020684957U CN 201981537 U CN201981537 U CN 201981537U
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- rock burst
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- anchor pole
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Abstract
The utility model discloses a water expansion type elastic anchor rod device for resisting rock burst. A rod body is respectively connected with an end sleeve and a check ring, and one end of the check ring is welded with a convex ring. An injection mouth is connected with the check ring, and one segment of the injection mouth is extended into the rod body. A stiff spring is arranged on the check ring of the outer end part of the anchor rod, and the two ends of the stiff spring are respectively provided with a gasket, wherein one gasket is connected with the convex ring on the check ring, and the other gasket is connected with a stress diffusion tray. The bore diameter of a centre bore of the stress diffusion tray is coincident with the bore diameter of a bore hole, and the gaskets and the stiff spring are sheathed on the check ring. The water expansion type elastic anchor rod device for resisting rock burst has simple structure and convenience for installing, can meet the requirements of fast and immediate support, and can effectively reduce the extent of damage and threat of rock burst to surrounding rock, people and equipment. The stiff spring of the outer end part is combined with the rod body of the water expansion type anchor rod, so the full length anchorage force can be provided, the rock kinetic energy generated during rock burst is quickly consumed in the fiction process of the rock fracture surfaces, and the vibration process caused by rock burst is as soon as finished.
Description
Technical field
The utility model relates to geotechnical engineering anchoring support field, particularly relates to the rock burst prevention and control field.More specifically relate to a kind of water swelling formula elastic reactance rock burst anchor pole, in the surrounding rock supporting that has rock burst to threaten, the engineering project disaster that effective control rock burst is caused has realistic meaning.
Background technology
Water swelling formula anchor pole now in geotechnical engineering anchoring support field, especially is used widely in the rock burst prevention and control field.This anchor pole is made by thin-walled concave cross section steel pipe, by water under high pressure anchor pole is expanded, thereby is adjacent to borehole wall fully, produces frictional force, mechanical chain power and pressure along the anchor pole total length rock mass is reinforced.Its characteristics are as follows: (1) speed of application is fast, need not be in the milk, thereby the use of having saved cement grout is convenient and swift.(2) excellent anti-vibration resistance is arranged, can approach work plane and install.(3) has the active force of anti-shearing displacement.(4) body of rod total length expands and is close to irregular hole wall, and any one section part that all can become independent action plays the anchoring effect.(5) surface anticorrosion is handled, and does not worry the corrosion situation.
Water swelling formula anchor pole is a kind of full length fastening formula anchor pole, under general condition, is more effective for the control rock burst.But, when Dong Bi top layer country rock relatively broken (perhaps higher geostatic stress cause country rock top layer slabbingization serious) (as the buried diversion tunnel marble of Jinping hydropower station country rock), the launching of top layer slabbing country rock when only depending on full length fastening can't limit rock burst, thus cause the anti-rock burst function of water swelling formula anchor pole to have a greatly reduced quality even lost efficacy.Therefore, on the basis of water swelling formula anchor pole, increased a stiffness spring device in the outer end of anchor pole, top layer slabbing breaking surrounding rock launches phenomenon during rock burst that quasi-solution is determined above-mentioned.
Summary of the invention
The purpose of this utility model is to be to provide a kind of water swelling formula elastic reactance rock burst anchor pole, and it is simple in structure, and is easy for installation, can satisfy requirement quick, immediate support, and can effectively reduce destructiveness and the threat that rock burst causes country rock, personnel and equipment.The stiffness spring of its outer end combines with the body of rod of water swelling formula anchor pole, both can provide full length fastening power, the also sustainable end anchorage power that provides, make whole anchor pole adapt to the follow-up rock mass vibrations that rock burst causes, prevent that the country rock avalanche from hurting sb.'s feelings and equipment, the rock mass kinetic energy that rock burst is produced consumes rapidly in the friction process of rock cranny face, and the vibrations process that rock burst is caused finishes as early as possible.
A kind of water swelling formula elastic reactance rock burst anchor pole, comprise the body of rod, end cover, stress diffusion pallet, back-up ring, liquid injecting mouth, packing ring, stiffness spring, wherein the body of rod, end cover, stress diffusion pallet, back-up ring, liquid injecting mouth are the ingredient of the water swelling formula anchor pole that uses in the present engineering.It is characterized in that: the body of rod links to each other with end cover, back-up ring respectively, forms the anchor pole major part, and liquid injecting mouth and back-up ring join, and liquid injecting mouth is deep in the body of rod for one section, as the intake tunnel of water under high pressure; Described back-up ring has certain length requirement, is welded with a protruding circle at an end of back-up ring.On the back-up ring of anchor pole outer end stiffness spring is housed, at the two ends of stiffness spring a packing ring is housed respectively, one of them links to each other with protruding circle on the back-up ring, and another links to each other with stress diffusion pallet.The centre bore aperture of described stress diffusion pallet is consistent with boring aperture.Described packing ring and stiffness spring are enclosed within on the back-up ring, and stiffness spring has the initial compression amount.On the basis of water swelling formula anchor pole, back-up ring has increased length, and welds a protruding circle in the outer end, to adapt to miscellaneous part; Two parts of stiffness spring and packing ring have been added; Pallet has also used the prestressing force pallet of large-size, has increased the anchoring scope on the country rock wall.Water swelling formula elastic reactance rock burst anchor pole is divided into the anchorage part that embeds rock mass and is exposed at the outer end of rock mass outside, the outer end comprises stress diffusion pallet, back-up ring, liquid injecting mouth, packing ring, stiffness spring, at the two ends of stiffness spring a packing ring is housed respectively, one of them links to each other with protruding circle on the back-up ring, and another links to each other with stress diffusion pallet.Stiffness spring on the outer end can provide lasting anchored force; The packing ring at stiffness spring two ends plays and reduces wearing and tearing, disperses and transmit the pressure effect.
The anchorage part of described anchor rod body adopts the body of rod form of water swelling formula anchor pole, make by thin-walled concave cross section steel pipe, by water under high pressure anchor pole is expanded, thereby be adjacent to borehole wall fully, produce frictional force, mechanical chain power and pressure along the anchor pole total length rock mass is reinforced.
Described anchor pole outer end is connected with the protruding circle on back-up ring, stress diffusion pallet, packing ring, stiffness spring, the back-up ring in turn, and integral body applies anchored force to anchor rod system, fixedly whole system.Stress diffusion pallet back cushion circle passes the pressure of coming and is close on the country rock wall; Stress diffusion pallet, packing ring and stiffness spring are enclosed within on the back-up ring, can be free to slide; Protruding circle on the back-up ring is welded on the back-up ring, offers packing ring, stiffness spring, pressure of stress diffusion pallet.
Described end overlaps and back-up ring, is welded on the two ends of the body of rod respectively, plays the effect of shutoff.
Described stiffness spring outside between anchor section two packing rings, it is made according to GB/T23934-2009 " hot rolling cylindroid helical-coil compression spring technical condition " regulation and stipulation, structural shape adopts RY I type two ends circle and tightly polishes.The anchored force that the initial compression amount of stiffness spring satisfies design gets final product.，
Described packing ring between the protruding circle on stress diffusion pallet, stiffness spring and the back-up ring, adopts the bigger metal washer of rigidity, and its effect is to reduce wearing and tearing, disperse and transmit pressure.
Described stress diffusion pallet is positioned at drilling orifice and is close to country rock, its pattern adopts mining anchor pole pallet, its size should design according to range size and the anchor pole spacing that rock burst takes place, than traditional anchor pole pallet more greatly, except the effect of playing stress diffusion, can also prevent that the rock mass avalanche from getting off to hurt sb.'s feelings and equipment.
The utility model compared with prior art has the following advantages and effect:
A, remedied the deficiency of water swelling formula anchor pole to the supporting of country rock top layer, launching of top layer slabbing country rock played preventive and therapeutic effect during to rock burst;
The stiffness spring of B, increase can resist moment the impact large deformation, adapt to top layer surrouding rock deformation elastic oscillation, absorb kinetic energy and lasting anchored force (being equivalent to provide confined pressure) be provided;
C, anchor pole integral body can adapt to the process that the elastic oscillation of top layer surrouding rock deformation and rock burst take place, and provide lasting and a supporting drag that changes with vibrations, prevent that top layer country rock avalanche from hurting sb.'s feelings and equipment; In several vibrations process, the kinetic energy of top layer crack rock is finished the vibrations that rock burst causes as early as possible by the friction consumption of fissure-plane.
The stiffness spring of D, its outer end combines with the body of rod of water swelling formula anchor pole, both can provide full length fastening power, the also sustainable end anchorage power that provides, be applicable in the surrounding rock supporting of rock burst generation, it is simple in structure, easy for installation, requirement quick, immediate support can be satisfied, and destructiveness and the threat that rock burst causes country rock, personnel and equipment can be effectively reduced.
Description of drawings
Fig. 1 is a kind of water swelling formula elastic reactance rock burst anchor pole schematic diagram
Fig. 2 is an anchor pole schematic diagram behind the water swelling
Fig. 3 is an anchor rod body cross-sectional configuration schematic diagram before and after the water swelling
Fig. 4 is each parts connection diagram of outer end
Fig. 5 is the back-up ring structural representation
Fig. 6 is end nested structure schematic diagram
Wherein: the body of rod before 1-water swelling; 2-end cover; 3-stress diffusion pallet; 4-back-up ring; 5-liquid injecting mouth; 6-water under high pressure inlet opening; Protruding circle on 7-back-up ring; 8-packing ring; 9-stiffness spring; 10-hole wall; 11-country rock wall; Wedge in 12-back-up ring; Wedge in 13-end cover; The body of rod behind 14-water swelling; 15-body of rod cavity.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
According to Fig. 1, Fig. 4 as can be known, water swelling formula elastic reactance rock burst anchor pole, comprise the body of rod 1, end cover 2, stress diffusion pallet 3, back-up ring 4, liquid injecting mouth 5, packing ring 8, stiffness spring 9, wherein the body of rod 1, end cover 2, stress diffusion pallet 3, back-up ring 4, liquid injecting mouth 5 are the ingredient of the water swelling formula anchor pole that uses in the present engineering.On the basis of water swelling formula anchor pole, back-up ring 4 has increased length, and welds a protruding circle 7 in the outer end, to adapt to miscellaneous part; 8 two parts of stiffness spring 9 and packing ring have been added; Pallet has also used the stress pallet 3 of large-size, increased on the country rock wall 11 the anchoring scope.Water swelling formula elastic reactance rock burst anchor pole annexation is: the body of rod 1 two ends are connected the major part of formation anchor pole with end cover 2 with back-up ring 4 respectively; Liquid injecting mouth 5 joins with back-up ring 4, and liquid injecting mouth is deep in the body of rod 1 for 5 one sections, as the intake tunnel of water under high pressure; Stiffness spring 9 is enclosed within on the back-up ring 4, and lasting anchored force is provided; At the two ends of stiffness spring 9 packing ring 8 is housed respectively, one of them links to each other with protruding circle 7 on the back-up ring 4, and another links to each other with stress diffusion pallet 3, plays to reduce wearing and tearing, disperse and the effect of transmission pressure; Stress diffusion pallet 3, back-up ring 4, liquid injecting mouth 5, packing ring 8, stiffness spring 9 have been formed the outer end of anchor pole.
The anchorage part of described anchor rod body 1 adopts the body of rod form of water swelling formula anchor pole, make by thin-walled concave cross section steel pipe, by water under high pressure anchor pole is expanded, thereby be adjacent to the irregular hole wall 10 of boring fully, produce frictional force, mechanical chain power and pressure along the anchor pole total length rock mass is reinforced.
Described anchor pole outer end is connected with the protruding circle 7 on back-up ring 4, stress diffusion pallet 3, packing ring 8, stiffness spring 9, the back-up ring in turn, and integral body applies anchored force to anchor rod system, fixedly whole system.Stress diffusion pallet 3 back cushion circles 8 pass the pressure of coming and are close on the country rock wall 11; Stress diffusion pallet 3, packing ring 8 and stiffness spring 9 are enclosed within on the back-up ring 4, can be free to slide; Protruding circle 7 on the back-up ring is welded on the back-up ring 4, offers packing ring 8, stiffness spring 9,3 one pressure of stress diffusion pallet.
Described end cover 2 and back-up ring 4 are welded on the two ends of the body of rod 1 respectively, and the wedges 13 and 12 in end cover 2 and the back-up ring 4 are deep into respectively in the cavity 15 at the body of rod 1 two ends, have increased the rigidity of end cover 2 and back-up ring 4, and integral body plays the effect of shutoff.
Described stiffness spring 9 is between two packing rings 8 of outer end, and it is made according to GB/T23934-2009 " hot rolling cylindroid helical-coil compression spring technical condition " regulation and stipulation, and structural shape adopts RY I type two ends circle and tightly polishes.The anchored force that the initial compression amount of stiffness spring satisfies design gets final product.，
Described packing ring 8 between the protruding circle 7 on stress diffusion pallet 3, stiffness spring 9 and the back-up ring, adopts the bigger metal washer of rigidity, and its effect is to reduce wearing and tearing, disperse and transmit pressure.
Described stress diffusion pallet 3 is positioned at drilling orifice and is close to country rock, its pattern adopts mining anchor pole pallet, its size should design according to range size and the anchor pole spacing that rock burst takes place, than traditional anchor pole pallet more greatly, except the effect of playing stress diffusion, can also prevent that the rock mass avalanche from getting off to hurt sb.'s feelings and equipment; Pallet centre bore pore size is consistent with boring aperture, and when anchor rod body extended, pallet can slide along the anchor pole bar wall behind the water swelling.
As shown in Figure 1, 2, 3, anchor rod body expands anchor pole by the thin-walled concave cross section shape of the body of rod 1 by water under high pressure, the shape of the body of rod 14 behind the formation water swelling, make anchor pole bar wall be close to irregular hole wall 10, produce frictional force, mechanical chain power and pressure along the anchor pole total length rock mass is reinforced.
As shown in Figure 4, stress diffusion pallet 3, packing ring 8, stiffness spring 9 are enclosed within on the back-up ring 4 successively, and can slide on back-up ring 4, and integral body applies anchored force to anchor rod system, fixedly whole system.
As shown in Figure 5, back-up ring 4 one ends connect liquid injecting mouth 5, the other end and the body of rod 1 welding, and wedge 12 is connected with body of rod cavity 15 in the back-up ring.Water under high pressure inlet opening 6 is arranged on the liquid injecting mouth 5, and cover one plastic pipe on the liquid injecting mouth 5 before the water filling prevents inlet opening 6 obstructions.Welding one protruding circle 7 on the back-up ring 4 offers packing ring 8, stiffness spring 9,3 one pressure of stress diffusion pallet.
As shown in Figure 6, end cover 2 and the welding of the body of rod 1 one ends, inner wedge body 13 is deep in the body of rod cavity 15, plays plugging action.
When installing, anchor pole should note:
(1) boring length is greater than anchor rod body length, and the distance of end cover 2 ends at the bottom of the boring hole is at least the initial compression amount of stiffness spring 9.
(2) fill before the water under high pressure, will there be initial pressure the anchor pole outer end, makes stiffness spring 9 that certain decrement be arranged, and the body of rod can be laid down outer end pressure after expanding.
Claims (4)
1. water swelling formula elastic reactance rock burst anchor pole, it comprises the body of rod (1), end cover (2), stress diffusion pallet (3), back-up ring (4), liquid injecting mouth (5), packing ring (8), stiffness spring (9), it is characterized in that: the body of rod (1) overlaps (2) with end respectively, back-up ring (4) links to each other, liquid injecting mouth (5) joins with back-up ring (4), liquid injecting mouth is deep in the body of rod (1) for (5) one sections, on the back-up ring (4) of anchor pole outer end, stiffness spring (9) is housed, at the two ends of stiffness spring (9) packing ring (8) is housed respectively, one of them links to each other with protruding circle (7) on the back-up ring (4), and another links to each other with stress diffusion pallet (3).
2. a kind of water swelling formula elastic reactance rock burst anchor pole device according to claim 1, it is characterized in that: an end of described back-up ring (4) is welded with a protruding circle (7).
3. a kind of water swelling formula elastic reactance rock burst anchor pole device according to claim 1 is characterized in that: the centre bore aperture of described stress diffusion pallet (3) is consistent with boring aperture.
4. a kind of water swelling formula elastic reactance rock burst anchor pole device according to claim 1, it is characterized in that: described packing ring (8) and stiffness spring (9) are enclosed within on the back-up ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020684957XU CN201981537U (en) | 2010-12-28 | 2010-12-28 | Water expansion type elastic anchor rod for resisting rock burst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020684957XU CN201981537U (en) | 2010-12-28 | 2010-12-28 | Water expansion type elastic anchor rod for resisting rock burst |
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| Publication Number | Publication Date |
|---|---|
| CN201981537U true CN201981537U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020684957XU Expired - Fee Related CN201981537U (en) | 2010-12-28 | 2010-12-28 | Water expansion type elastic anchor rod for resisting rock burst |
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| CN (1) | CN201981537U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518460A (en) * | 2011-12-21 | 2012-06-27 | 湖南科技大学 | Preserved anchorage method for prevention and control of rockburst |
| CN102704970A (en) * | 2012-06-29 | 2012-10-03 | 山东大学 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN103670472A (en) * | 2014-01-07 | 2014-03-26 | 湖南科技大学 | Full-length anchoring-supported compatible-deformation anchoring device |
| CN105041355A (en) * | 2015-07-29 | 2015-11-11 | 中国科学院武汉岩土力学研究所 | Broaching type rock-burst-resistant anchor rod |
| CN111608710A (en) * | 2020-06-09 | 2020-09-01 | 河海大学 | Full-length hollow drainage resistance-increasing type yielding anchor rod |
-
2010
- 2010-12-28 CN CN201020684957XU patent/CN201981537U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518460A (en) * | 2011-12-21 | 2012-06-27 | 湖南科技大学 | Preserved anchorage method for prevention and control of rockburst |
| CN102704970A (en) * | 2012-06-29 | 2012-10-03 | 山东大学 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
| CN102704970B (en) * | 2012-06-29 | 2014-10-15 | 山东大学 | Pre-stressed anchor rod for underground engineering model test and operation method for pre-stressed anchor rod |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN103670472A (en) * | 2014-01-07 | 2014-03-26 | 湖南科技大学 | Full-length anchoring-supported compatible-deformation anchoring device |
| CN103670472B (en) * | 2014-01-07 | 2015-08-26 | 湖南科技大学 | A kind of compatible deformation anchor device of full length fastening supporting |
| CN105041355A (en) * | 2015-07-29 | 2015-11-11 | 中国科学院武汉岩土力学研究所 | Broaching type rock-burst-resistant anchor rod |
| CN105041355B (en) * | 2015-07-29 | 2017-07-28 | 中国科学院武汉岩土力学研究所 | The anti-rock burst anchor pole of broaching formula |
| CN111608710A (en) * | 2020-06-09 | 2020-09-01 | 河海大学 | Full-length hollow drainage resistance-increasing type yielding anchor rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20181228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |