CN100497887C - Bush bulging shell type self-drilling hollow anchor rod - Google Patents
Bush bulging shell type self-drilling hollow anchor rod Download PDFInfo
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- CN100497887C CN100497887C CNB2007101112428A CN200710111242A CN100497887C CN 100497887 C CN100497887 C CN 100497887C CN B2007101112428 A CNB2007101112428 A CN B2007101112428A CN 200710111242 A CN200710111242 A CN 200710111242A CN 100497887 C CN100497887 C CN 100497887C
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- rises
- shell
- hollow lever
- sleeve pipe
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Abstract
The invention relates to a casing pipe rising shell type self-drilling hollow anchor bar, belonging to project supporting field, which comprises a one-off drill bit, a steel plug, a rising shell, a casing pipe, a hollow bar body, a tray and a nut. The one-off drill bit is connected at the most front end of the hollow bar body, the life design is to drill a hole; the steel plug is scyewed joint and welded together with the hollow bar body, the lower end of the steel plug is in turn hollow housed the rising shell and the casing pipe; four slots are opened on the upper of the rising shell, and tilted teeth are machined in outside; the casing pipe is held on the lower end of the tray and is fixed by the nut. The invention is applied to the supporting of coal mine back, at first the quick load-bearing requirement is reached by mechanical rising shell ahead anchoring, then the whole length anchoring is realized by injecting sand-cement slurry. The invention has convenient drilling and mounting in the construction and changes construction process of the traditional anchor bar, and realizes integration of the drilling and anchoring of the coal drift supporting and is help to safe and quick supporting of the coal drift.
Description
Technical field
The invention belongs to geotechnical engineering anchoring support field.The present invention relates to a kind of sleeve pipe shell type self-drilling formula hollow bolt that rises, be applicable to the advance support and the permanent support of coal mine roadway top board.
Background technology
Bolt support is as a kind of effective roadway support mode, because invigoration effect to roadway surrounding rock intensity, can significantly improve the stability of country rock, have advantages such as support cost is lower, one-tenth lane speed is fast in addition, can improve the economic benefit of mine, thereby become a kind of main support form of countries in the world mine laneway, represented the main developing direction of colliery tunnel support technology.
As far back as the forties in 20th century, the U.S., the former Soviet Union just used bolt support at underworkings, and China used bolt support rock roadway in coal mine from 1956.In decades, following development course has been experienced in world's bolt support: 1945～nineteen fifty, mechanical rock bolt research and application; 1950～nineteen sixty, mining industry extensively adopts mechanical rock bolt, and begins system research is carried out in bolt support; 1960～1970 years, the resin anchoring agent anchor pole was released and is applied in the mine; 1970～1980 years, invention pipe-seam type anchor rod, expand tube formula anchor pole also were applied, and study new method simultaneously, and long anchor cable produces; 1980～nineteen ninety, assembled bolt, truss anchor pole, extraordinary anchor pole etc. are applied, and the resin anchoring material is improved; The nineteen ninety～so far, the resin anchoring agent anchor pole has become the principal mode of supporting under the coal mine.
The resin anchoring agent anchor pole is as the most widely used anchor pole of coal mine roadway at present, the resin anchoring agent anchor pole is divided into full length fastening and two kinds of forms of end anchorage, its anchor mechanism is by the resin explosive roll after stirring anchor pole and country rock to be bonded together, and reaches the purpose of bond-anchorage.Though the resin anchoring agent anchor pole is widely used in colliery tunnel support, but in application process, also there is certain problem, mainly show: the resin anchoring agent anchor rod construction process is loaded down with trivial details on the one hand, when having prolonged the bolt support holding time, has also increased construction workman's potential safety hazard.Its construction technology is: at first hole drill is good with jumbolter, put into resin explosive roll then, and again anchor pole is put into the Kong Zhongyong agitator and stir, after resin explosive roll stirs and tentatively solidifies, at last anchor pole is applied pretightning force.Can not determine the anchorage point of termination point of anchor rod anchoring after resin explosive roll stirs on the other hand, do not reach the anchoring effect of expection; And resin anchoring agent is after running into water, and its anchored force can significantly reduce.
Though a kind of self-drilling grouted anchor bar of extensive use in railway, highway tunnel and slope treatment at present, because the complexity of rock stratum, colliery, this anchor pole can't be used in coal roadway support.
Summary of the invention
The purpose of this invention is to provide a kind of novel anchor pole, solve the problem that exists in the present coal entry anchor rod support process, play the effect of safety work and quick supporting.
According to the present invention, a kind of sleeve pipe shell type self-drilling formula hollow bolt that rises is provided, this anchor pole is made up of disposable drill bit, steel plug, the shell that rises, sleeve pipe, hollow lever, pallet and nut seven parts, disposable drill bit and steel plug are fixedly connected on hollow lever, rise shell and sleeve pipe sky is enclosed within on the hollow lever, pallet is held sleeve pipe in the lower end, is fixed by nut.
Described disposable chisel edge is welded with carbide alloy, and this carbide alloy can be fixed on the bonded block by methods such as melting welding, soft soldering or hard solders, can will be designed to friction durability of carbide alloy 1.5 holes according to the depth of boring; Disposable drill bit and anchor bar body be by being threaded, pierce country rock after drill bit no longer take out.
Described steel is held beyond the Great Wall to cylindrical, lower end are taper, is installed in the lower end of drill bit, and the mode and the anchor bar body that add welding by screw thread link together; The shell that rises is a ducted body, and sky is enclosed within the outside of anchor bar body, and there is chamfering the front end inboard of the shell that rises, and its gradient is identical with steel plug cone gradient; The chamfered part roughness of the external surface of steel plug and the shell that rises is little, is convenient to the steel plug and clamp-ons the shell that rises; The steel plug is introduced into the shell part that rises in advance during assembling, and steel is contacted with the shell chamfer site that rises on the surface beyond the Great Wall fully; Behind the anchor pole drilling to completion, can apply mechanical anchor power to anchor pole immediately, thereby top board has been played leading anchorage effect.
Described casing wall thickness is 3mm, can move down by the sleeve pipe shell that prevents to rise when anchor pole is applied pretightning force, thereby make the shell spreading that rises.
Described hollow bolt body is drilling rod, creeps into the back body of rod and needn't take out, and has reduced the replacing drilling rod, has put operation such as anchor pole, has saved the time to a certain extent; The hollow bolt body has into water and slip casting function concurrently, by hollow lever slip casting, both roof strata has been played the permanent support effect under the situation that does not influence driving, has reduced development machine downtime again; The front end of hollow bolt body is connected with the steel plug with drill bit by the mode of screw thread and welding, and the rear end car of anchor bar body has screw thread, and nut can be installed, and is designed to outer hexagon with the jumbolter coupling part.
Described pallet is the butterfly pallet, and sky is enclosed within on the anchor bar body can hold sleeve pipe; Nut is installed in the anchor bar body lower end, can provide leading mechanical anchor power by nut being applied pretension.
Use before the novel anchor rod supporting construction of the present invention,, disposable drill bit, steel plug, the shell that rises, sleeve pipe, pallet and nut are installed from top to bottom, form a whole set of anchor pole at the hollow bolt body at rise each parts of shell type self-drilling formula hollow bolt of the good sleeve pipe of ground-mounted; During supporting construction, directly a whole set of anchor pole is inserted in six side's adapter sleeves of hydraulic jumbolter or pneumatic roof bolter, open jumbolter, carry out wet boring by the mesopore water filling of anchor bar body; When the anchor pole drilling to completion, when pallet touch top board, stop boring; Begin subsequently nut is applied pretightning force, force the shell spreading that rises, the outer wall of the shell that rises and country rock are tightly combined, play the leading anchorage effect of machinery, finish the installation of anchor pole by moving down of the body of rod; Propped up at last should beat anchor pole after, development machine moves on, and under the situation that does not influence the development machine coal cutting, carries out later stage slip casting by the hollow bolt body, to reach the purpose of permanent support.
Compare with existing coal roadway support anchor pole by the sleeve pipe disclosed by the invention shell type self-drilling formula hollow bolt that rises, rate of penetration is very fast, there is not interference in the drilling process, creeps into the back body of rod and no longer take out, avoided changing drilling rod in the resin anchor construction, put anchor pole, put loaded down with trivial details technology such as powder stick; Anchor pole can apply pretightning force to anchor pole behind the drilling to completion immediately in installation process, the anchor pole set-up time reduces, and makes the construction workman in not supporting following working time of state shortening of top board, provides safety guarantee for the construction workman to a certain extent; To its pretightning force that applies, can provide quick supporting capacity to top board behind the anchor pole drilling to completion, this quick bearing capacity meets safety of coal mines supporting requirement, has prevented the quick absciss layer phenomenon of country rock; Under the situation that does not influence the development machine driving, carry out later stage slip casting, not only make anchor pole have the permanent support function, also make the coal cutting time lengthening of development machine, solved development machine coal cutting and bolt support to a certain extent and do not criticized problem, improved economic benefit.
Description of drawings
Fig. 1 anchor structure schematic diagram of the present invention
The front view of hollow lever 7 shown in Fig. 2 Fig. 1
A-A place sectional view among Fig. 3 Fig. 2
B-B place sectional view among Fig. 4 Fig. 2
The main sectional view of steel plug 2 shown in Fig. 5 Fig. 1
The front view of shell 3 rises shown in Fig. 6 Fig. 1
The main sectional view of pallet 5 shown in Fig. 7 Fig. 1
Wherein:
1---disposable drill bit 2---steel plug 3---rises shell
4---sleeve pipe 5---pallet 6---nuts
The six rib external surfaces of 7---hollow lever 8---hollow lever 7
9---hollow lever 7 with nut connecting thread 10---hollow lever 7 with drill bit and steel plug connecting thread
11---mesopore 12 of hollow lever 7---poppet surface of steel plug 2
13---helical teeth 14 of the shell 3 that rises---crack of the shell 3 that rises
15---the inner surface of pallet 5
The specific embodiment
As Fig. 1 is automatic anchor pole structural representation of the present invention, and anchor pole of the present invention is made up of disposable drill bit 1, steel plug 2, the shell 3 that rises, sleeve pipe 4, pallet 5, nut 6 and hollow lever 7.Disposable drill bit 1 is threaded in the front end of hollow lever 7, and steel plug 2 also is connected with hollow lever 7 by screw thread, welds simultaneously; Rise shell 3 and sleeve pipe 4 skies are enclosed within on the hollow lever 7, and the lower end of sleeve pipe 4 is enclosed within by pallet 5 skies and holds sleeve pipe 4 on the hollow lever 7, plays axial restraint by nut 6 bottom.
As Fig. 2 is the front view of hollow lever 7, and the body of rod and jumbolter connecting portion are designed to six rib external surfaces 8, and this design outline can make anchor pole directly combine with rig, improves drilling efficiency; The connecting portion design of the body of rod and nut has screw thread 9, and the length of thread segment requires to decide according to pretension; In the same design of the external surface of the other end of hollow lever 7 screw thread 10 is arranged, the length of this thread segment is decided according to the relative dimensions of disposable drill bit 1 and steel plug 2.Fig. 3 and Fig. 4 are respectively the sectional view of hollow lever 7 at A-A place and B-B place, and wherein 11 is the mesopore of hollow lever 7, be used for water filling and carry out wet boring in drilling process, inject cement mortar by mesopore 11 in slip casting anchoring process.
As Fig. 5 is the front view of steel plug 2, the lower end of steel plug is designed to poppet surface 12, guaranteeing during design to contact cooperation with the shell that rises tight, all is to be pressed in the shell 3 that rises by the steel plug when anchor pole being applied prefastening load and surrounding rock failure load, forces its spreading to play anchorage effect.
As Fig. 6 is the front view of shell 3 of rising, and the upper end design of the shell that rises has helical teeth 13, and is evenly equipped with four cracks 14 upper end is divided into pintongs.Thereby the friction that helical teeth 13 can increase when anchoring with country rock improves anchoring property, and crack 14 forces the easier spreading of the shell that rises in the time of can making steel plug 2 in being pressed into the shell 3 that rises.
As Fig. 7 is the main sectional view of pallet 5, and its profile is designed to butterfly, can make pallet distortion by its profile when bearing load can play cushioning effect like this.The inner surface 15 of pallet 5 is spherical, and the lower end is the plane, and requirement can be held sleeve pipe.
Before construction each parts is assembled by Fig. 1, at first automatic anchor pole is directly inserted in six side's adapter sleeves of jumbolter in the work progress, jumbolter can adopt pneumatic or hydraulic driving mode; Start rig aligning top board assigned address and hole, pass through hollow lever 7 water filling wet borings in the drilling process; When the anchor pole drilling to completion, apply pretightning force by 6 pairs of anchor poles of fastening nut, the precession size of nut 6 is steel plug 2 and moves down size, closely contacts with country rock along with moving down of steel plug forces shell 3 spreadings that rise; Natural absciss layer anchor pole along with roof rock after pretension finishes will bear the failure load of country rock gradually, make the shell that rises continue to expand, and anchoring frictional force continues to improve; Advance support carries out slip casting to the automatic anchor pole that is propped up, again to guarantee the final anchoring property of automatic anchor pole after finishing under the situation that does not influence the development machine coal cutting.
Claims (4)
1, a kind of sleeve pipe shell type self-drilling formula hollow bolt that rises, this anchor pole is made up of disposable drill bit (1), steel plug (2), the shell that rises (3), sleeve pipe (4), pallet (5), nut (6) and hollow lever (7) seven parts, it is characterized in that:
Described disposable drill bit (1) and steel plug (2) are fixedly connected on described hollow lever (7), the bottom of described steel plug (2) is cylindrical for conical, top, itself and described hollow lever (7) are by thread connection and weld, and described disposable drill bit (1) is connected the upper end of described hollow lever (7);
Described sleeve pipe (4) and the shell that rises (3) sky are enclosed within on the described hollow lever (7), the described shell that rises (3) has the steel pipe of four seams for front end, and the external process at the shell that rises has helical teeth, and described sleeve pipe (4) can support the shell that rises it is backed down for having the steel pipe of certain wall thickness during the anchor pole pretension;
Described pallet (5) is connected the lower end of described hollow lever (7), and it is the butterfly pallet, and sky is enclosed within hollow lever (7) and goes up and sleeve pipe (4) is held, and is fixing by described nut (6);
One of described hollow lever (7) is six rib external surfaces (8), and the external surface of its adjacent part (9) and the other end (10) all has screw thread;
When mechanical anchor, described hollow lever (7) does not stress with the connection place of disposable drill bit (1), and described steel plug (2) is stressed with hollow lever (7) connection place.
2, the sleeve pipe according to claim 1 shell type self-drilling formula hollow bolt that rises, it is characterized in that: the projected life of described disposable drill bit (1), it connected for being threaded with hollow lever (7) in order can bore 1-2 hole.
3, the sleeve pipe according to claim 1 shell type self-drilling formula hollow bolt that rises, it is characterized in that: the intermediate throughholes of described hollow lever (7) is used for water filling when armature boring, is used to inject cement mortar when strengthening anchoring in the later stage.
4, the sleeve pipe according to claim 1 shell type self-drilling formula hollow bolt that rises, it is characterized in that: a whole set of anchor pole assembly directly is installed on the jumbolter connection place in the work progress, wet boring is carried out in intermediate throughholes water filling by hollow lever (7), makes the boring procedure smoothness; When the anchor pole drilling to completion, under the situation of not changing other facility, directly carry out pretension by the designed pre-tightening apparatus of jumbolter front end, realize mechanical anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101112428A CN100497887C (en) | 2007-06-19 | 2007-06-19 | Bush bulging shell type self-drilling hollow anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101112428A CN100497887C (en) | 2007-06-19 | 2007-06-19 | Bush bulging shell type self-drilling hollow anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054901A CN101054901A (en) | 2007-10-17 |
| CN100497887C true CN100497887C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101112428A Expired - Fee Related CN100497887C (en) | 2007-06-19 | 2007-06-19 | Bush bulging shell type self-drilling hollow anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100497887C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505687B (en) * | 2011-12-13 | 2014-08-06 | 江苏建筑职业技术学院 | Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof |
| CN102877867B (en) * | 2012-09-26 | 2015-07-15 | 山东科技大学 | Novel inflatable yielding pre-stress grouting anchor rod and usage method thereof |
| CN104018863A (en) * | 2014-05-16 | 2014-09-03 | 山东科技大学 | Multi-section-expansion yielding prestress grouting anchor rod and using method thereof |
| CN105443150A (en) * | 2015-11-23 | 2016-03-30 | 成都现代万通锚固技术有限公司 | Self-drilling anchor rod capable of rapidly mounting |
| CN107524463A (en) * | 2017-09-11 | 2017-12-29 | 李顺良 | A kind of expansion shell type hollow bolt |
| EP3964660A4 (en) * | 2019-04-30 | 2023-01-25 | Cha, Ju Byeong | Improved anchor bolt assembly and ceiling finishing panel fixing apparatus comprising same |
| CN113864304B (en) * | 2020-06-30 | 2023-06-13 | 喜利得股份公司 | Installation device and installation method for self-drilling anchor bolt |
| CN112431624A (en) * | 2020-11-16 | 2021-03-02 | 河南理工大学 | One-step anchor rod and supporting operation method thereof |
| CN112664251B (en) * | 2020-12-30 | 2022-07-05 | 开滦（集团）有限责任公司 | Hydraulic expansion type grouting anchor rod and anchoring method |
-
2007
- 2007-06-19 CN CNB2007101112428A patent/CN100497887C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101054901A (en) | 2007-10-17 |
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Granted publication date: 20090610 Termination date: 20130619 |