CN108167008A - The anchor rod anchored power apparatus of soft-rock tunnel - Google Patents
The anchor rod anchored power apparatus of soft-rock tunnel Download PDFInfo
- Publication number
- CN108167008A CN108167008A CN201711427733.3A CN201711427733A CN108167008A CN 108167008 A CN108167008 A CN 108167008A CN 201711427733 A CN201711427733 A CN 201711427733A CN 108167008 A CN108167008 A CN 108167008A
- Authority
- CN
- China
- Prior art keywords
- anchor
- anchor pole
- whitewashing
- cement mortar
- bottom plate
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
Abstract
The invention discloses the anchor rod anchored power apparatus of soft-rock tunnel, including anchor pole, anchor-rod tray, cement mortar, mud stone and bottom plate, the bottom plate is internally provided with anchor pole, the outside of the anchor pole is filled with multiple whitewashing, the lower section whitewashed again is filled with anti-bottom arch and just whitewashes, and multiple whitewashing is just provided with mesh sheet in whitewashing centre position with anti-bottom arch, just whitewashing lower section is mud stone to the anti-bottom arch, the surface of the anchor pole, which is run through, anchor-rod tray, Anchor Agent is provided with below the cement mortar, and Anchor Agent is wrapped in the surface of anchor pole.The present invention coordinates full length fastening method by bottom plate using Anchor Agent and cement mortar, enhance water proof and anchoring effect, when bottom plate has water, the glutinous mud of aqueous formation in eyelet influences the anchoring of Anchor Agent and hole wall, pretightning force requirement can only be met using traditional method, it cannot be guaranteed that anchored end meets anchor pole surrender and the requirement of Fracture Force when pressing when tunnel, anchor pole caused integrally to be extracted with Anchor Agent so that integer support fails.
Description
Technical field
The present invention relates to anchor pole technique for fixing fields, the specially anchor rod anchored power apparatus of soft-rock tunnel.
Background technology
New Shanghai No.1 coal mine geological formations mainly based on the soft rock stratas such as mud stone and Sandy Silt, are opened up, are accurate
Standby and stope drift active workings supporting object is all the low soft rock of compression strength, and the emphasis of soft rock strata roadway support is bottom plate controls
Reason, the anchor force of anti-bottom arch anchor pole are to determine the most critical factor that bottom plate is administered, and need to further improve soft-rock tunnel anchor pole
(rope) anchoring quality, so as to reach the requirement for ensureing laneway molding, reducing roadway maintenance cost, under soft rock geological conditions, especially
There is water tunnel, it is exactly to solve the problems, such as soft rock substantially to solve the problems, such as bottom plate anchor-holding force of anchor bolt, and upper Hai Miao mining area major part mine is equal
For soft rock strata, the developing and preparation of mine will all encounter same problem, in identical adjacent mining area and other soft rock geology items
Bottom plate under part, which is administered, has important reference value.
Possessed shortcoming is insufficient：
1. water proof and anchoring effect are enhanced using Anchor Agent and cement mortar cooperation full length fastening method in bottom plate.Bottom plate has
During water, the glutinous mud of aqueous formation in eyelet influences the anchoring of Anchor Agent and hole wall, and can only meet pretightning force using traditional method will
It asks, cannot be guaranteed that anchored end meets anchor pole surrender and the requirement of Fracture Force when pressing when tunnel, cause anchor pole whole with Anchor Agent
It extracts so that integer support fails；
2. changing construction technology sequence, anchored end is made to apply pretightning force again after forming enough anchor forces.It is done using tradition
Method is first constructed square, then linked network supporting, is whitewashed again after the completion of supporting.Setting time is short after being stirred due to Anchor Agent, then adds
It is upper there is no time enough pre-hardening without cement mortar after carrying out slip casting or slip casting, it be easy to cause anchored end anchor force and does not reach
Optimum state；
3. when anchored end anchor force is sufficiently large, applying the anchor-rod tray end rock of pretightning force does not have enough resistance to compression shearing resistances strong
It when spending, be easy to cause anchor-rod tray and sink, bolt pretension failure over time causes anti-so that it cannot meet design requirement
Bottom arch supporting failure, anti-bottom arch need immediate support, and boring head of delaying is no more than 50m, reduces roadway surrounding rock plastic failure and becomes
Shape or even effective support is carried out to bottom plate in elastic deformation area, form tunnel and complete squeeze arch confrontation Tunnel Pressure
Deformation.
Soften 4. floor rock meets water, easily disintegration, intensity substantially reduce.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides the anchor rod anchored power apparatus of soft-rock tunnel, soft rock strata is solved
The bottom plate of roadway support is in administering the problem of the anchor force of anti-bottom arch anchor pole.
(2) technical solution
To achieve the above object, the present invention provides following technical solution：The anchor rod anchored power apparatus of soft-rock tunnel, including anchor
Bar, anchor-rod tray, cement mortar, mud stone and bottom plate, the bottom plate are internally provided with anchor pole, and the outside of the anchor pole is filled with multiple spray
Slurry, the lower section whitewashed again are filled with anti-bottom arch and just whitewash, and multiple whitewashing is just provided with net in whitewashing centre position with anti-bottom arch
Piece, the anti-first whitewashing lower section of bottom arch are mud stone, and through there is anchor-rod tray, the lower section of the cement mortar is set on the surface of the anchor pole
There is Anchor Agent, and Anchor Agent is wrapped in the surface of anchor pole, the top of the anchor pole is provided with baffle ring.
Preferably, cement mortar is provided with below the anchor-rod tray, and cement mortar is wrapped in the surface of anchor pole.
Preferably, the mesh sheet is connected to the both sides of anchor-rod tray.
Preferably, the cement mortar is formed using lime stone, clay.
Preferably, the lower section of the baffle ring is disposed with rubber washer, only cylinder pad, slurry set, screw thread, connection from top to bottom
Device, stop nut, swollen shell and anchored end.
(3) advantageous effect
The present invention provides the anchor rod anchored power apparatus of soft-rock tunnel, have following advantageous effect：
(1) present invention by change construction technology sequence, anchored end is made to apply pretightning force again after forming enough anchor forces,
It is first constructed square using traditional method, then linked network supporting is whitewashed again after the completion of supporting.
(2) present invention coordinates cement mortar anchor pole Bolt, and without linked network supporting by Anchor Agent of first constructing,
And carry out just spray operation so that Anchor Agent and cement mortar have enough presetting periods, the time interval about five of two procedures
Hour, have enough presetting periods completely so that anchor force reaches maximum value, then linked network, increase anchor-rod tray supporting, linked network branch
The arch whitewashing closing of secondary counter bottom is carried out after shield.
(3) present invention is by upper bolt disk after just spraying, and anchor-rod tray is pressed on mesh sheet and gunite layer so that anchor-rod tray has stabilization
Impetus, anchor pole easily reaches design pretightning force, and the first spray 100mm of anti-bottom arch just carries out linked network upper bolt disk, anchor-rod tray after spray
Active force is applied to above mesh sheet and gunite layer, is solved anchor-rod tray active force on bottom plate soft rock, is caused to sink, and anchor pole pre-tightens
Power inadequate problem carries out the second gunite after linked network supporting, and whitewashing twice forms entirety with anchor-rod tray, cap, mesh sheet, effectively increases
The forced area and shear strength of pressure end, anchor rod anchored end act on forming extruding arch with pressure end simultaneously, and anchor pole is encircleed at anti-bottom
Act on the complete supporting that ensure that tunnel simultaneously with side portion's anchor pole.
(4) present invention is considered as reducing bottom plate exposure and soaked time to the greatest extent by bottom plate supporting, with prolonging for time
Long bottom plate reduction is further serious, once do not obtain effective support will result in bottom distension to bottom plate for a long time, is just made after playing bottom repeatedly
Into the overall collapse in tunnel, repaired again after unstability and be difficult to ensure molding, in tunnel low-lying o'clock every one section away from
From the sedimentation basin that depth is more than 2m is dug, since construction and top plate water drenching introduce water nest, floor rock water content will be reduced in tunnel,
Resistance to compression and strain resistant ability, square of having constructed are improved, carries out note anchor pole at once, bottom plate infiltration is reduced and causes in hole rock by water
The time impregnated and softened.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is figure anchor structure figure of the present invention.
In figure：1 multiple whitewashing, 2 mesh sheet, 3 anti-bottoms arch just whitewashings, 4 anchor poles, 5 anchor-rod trays, 6 cement mortars, 7 Anchor Agents, 8 mud stone,
9 baffle rings, 10 rubber washers, 11 cylinder pads, 12 only slurry set, 13 screw threads, 14 connectors, 15 stop nuts, 16 swollen shells, 17 anchored ends,
18 bottom plates.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
As shown in Figs. 1-2, the present invention provides a kind of technical solution：The anchor rod anchored power apparatus of soft-rock tunnel, including anchor pole 4,
Anchor-rod tray 5, cement mortar 6, mud stone 8 and bottom plate 18, bottom plate 18 are internally provided with anchor pole 4, and the outside of anchor pole 4 is filled with multiple whitewashing
1,1 lower section of whitewashing again is filled with the just whitewashing 3 of anti-bottom arch, and whitewash 1 is just provided with mesh sheet 2 in 3 centre positions of whitewashing again with anti-bottom arch,
Anti- 3 lower section of bottom arch just whitewashing is mud stone 8, and through there is anchor-rod tray 5, the lower section of cement mortar 6 is provided with anchoring on the surface of the anchor pole 4
Agent 7, Anchor Agent 7 are wrapped in the surface of anchor pole 4, and the top of anchor pole 4 is provided with baffle ring 9, and the lower section of anchor-rod tray 5 is provided with cement mortar
6, cement mortar 6 is wrapped in the surface of anchor pole 4, and mesh sheet 2 is connected to the both sides of anchor-rod tray 5, and by first constructing, Anchor Agent coordinates cement
6 anchor pole Bolts 4 are starched, and without linked network supporting, and carry out just spray operation so that Anchor Agent 7 and cement mortar 6 have
Enough presetting periods, the time interval of two procedures about 5 hours have enough presetting periods so that anchor force reaches completely
Maximum value, then linked network, increase anchor-rod tray supporting carry out 3 closing of secondary counter bottom arch whitewashing after linked network supporting, cement mortar 6 uses
Lime stone, clay are formed, and the lower section of baffle ring 9 is disposed with rubber washer 10, only cylinder pad 11, slurry set 12, screw thread from top to bottom
13rd, connector 14, stop nut 15, swollen shell 16 and anchored end 17.
In use, improving anchor force using anchored end 17, apply the raising shearing resistance of pretightning force end, the mode of compression strength makes instead
Bottom arch anchor pole fully meets the requirement of design anchor force, pretightning force, after the completion of construction, anti-bottom arch anchor pole and the support anchor rod in portion of side
It cooperatively forms and squeezes arch around the complete of tunnel profile, using the variation of working procedure, 4 working procedure of anchor pole is arranged in and is just sprayed
Before slurry, but apply pretightning force and be placed on after just whitewashing, not only met water-setting slurry initial set and reached design anchoring requirement, but also to apply
The 5 end forced area of anchor-rod tray of pretightning force increases, and compression strength increases, so as to ensure that 4 anchor force of anchor pole and later stage due to
The carrying pressure that roadway deformation generates, until 4 Fracture Force of anchor pole, the integral strength of anchor pole 4 must want maximum and utilize, by just whitewashing
The problem of closing rock in time avoids 18 rock of bottom plate and meets argillization, disintegration after water, and intensity first mate reduces, by field measurement,
Not using before the method, it is 85% or so that anti-bottom arch anchor-holding force of anchor bolt, which reaches design pretightning force (300N.m) qualification rate, but away from
Also have with a distance from very big from anchor pole maximum load capacity (Fracture Force), is improved using anchor force first mate after process improving, do not had because of reaching
The phenomenon that anchor pole 4 is extracted after to pretightning force, anchor force are more than the maximum load-carrying capacity of anchor pole 4, this sets the road maintenance amount that can allow
85% is reduced, integrally repaiies rate again into lane as 1% hereinafter, crossheading supporting reduces 600 meters of road maintenance amount every year, reduction repair is artificial
Take and fee of material：Ten thousand yuan of 600*3000=180, upper Hai Miao mining area major part mine is soft rock strata, is required for carrying out tunnel
Anti- bottom arch construction, other mine laneways driving all has very big promotional value in mining area.It is simultaneously upper Hai Miao mining area soft rock
Supporting complete set technology provides theoretical and technical support, economic benefit and social benefit highly significant, has larger promotion price
Value.
Can to sum up obtain, the present invention by it is multiple whitewashing 1, mesh sheet 2, anti-bottom arch just whitewashing 3, anchor pole 4, anchor-rod tray 5, cement mortar 6,
Anchor Agent 7, mud stone 8 and anchored end 17 solve the anchor force of anti-bottom arch anchor pole in the bottom plate improvement of soft rock strata roadway support
The problem of.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are separated with another entity or operation console, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. the anchor rod anchored power apparatus of soft-rock tunnel, including anchor pole (4), anchor-rod tray (5), cement mortar (6), mud stone (8) and bottom plate
(18), it is characterised in that：The bottom plate (18) is internally provided with anchor pole (4), and the outside of the anchor pole (4) is filled with multiple whitewashing
(1), anti-bottom arch just whitewashing (3) is filled with below the multiple whitewashing (1), and just whitewashing (3) is intermediate with anti-bottom arch for multiple whitewashing (1)
Position is provided with mesh sheet (2), and the anti-bottom is encircleed for mud stone (8) below just whitewashing (3), and the surface of the anchor pole (4), which is run through, anchor
Bar disk (5) is provided with Anchor Agent (7), and Anchor Agent (7) is wrapped in the surface of anchor pole (4), institute below the cement mortar (6)
The top for stating anchor pole (4) is provided with baffle ring (9), cement mortar (6) is provided with below the anchor-rod tray (5), and cement mortar (6) wraps
The surface of anchor pole (4) is rolled in, the mesh sheet (2) is connected to the both sides of anchor-rod tray (5).
2. the anchor rod anchored power apparatus of soft-rock tunnel according to claim 1, it is characterised in that：The cement mortar (6) uses
Lime stone, clay are formed.
3. the anchor rod anchored power apparatus of soft-rock tunnel according to claim 1, it is characterised in that：The lower section of the baffle ring (9)
It is disposed with rubber washer (10), only cylinder pad (11), slurry set (12), screw thread (13), connector (14), limiting spiral shell from top to bottom
Female (15), swollen shell (16) and anchored end (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427733.3A CN108167008A (en) | 2017-12-26 | 2017-12-26 | The anchor rod anchored power apparatus of soft-rock tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427733.3A CN108167008A (en) | 2017-12-26 | 2017-12-26 | The anchor rod anchored power apparatus of soft-rock tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108167008A true CN108167008A (en) | 2018-06-15 |
Family
ID=62520562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711427733.3A Pending CN108167008A (en) | 2017-12-26 | 2017-12-26 | The anchor rod anchored power apparatus of soft-rock tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
-
2017
- 2017-12-26 CN CN201711427733.3A patent/CN108167008A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764864A (en) * | 2020-07-10 | 2020-10-13 | 中国矿业大学 | Drilling and guniting reinforcement method for loose and broken coal and rock area |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180615 |
|
| WD01 | Invention patent application deemed withdrawn after publication |