CN103161484B - A kind of lotion fixed length anchoring support method - Google Patents
A kind of lotion fixed length anchoring support method Download PDFInfo
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- CN103161484B CN103161484B CN201310093906.8A CN201310093906A CN103161484B CN 103161484 B CN103161484 B CN 103161484B CN 201310093906 A CN201310093906 A CN 201310093906A CN 103161484 B CN103161484 B CN 103161484B
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- lotion
- slurries
- anchor pole
- rope
- boring
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- 239000006210 lotion Substances 0.000 title claims abstract description 43
- 238000004873 anchoring Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 40
- 239000004568 cement Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 231100000241 scar Toxicity 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 19
- 230000008093 supporting effect Effects 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 239000011440 grout Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 241000537371 Fraxinus caroliniana Species 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00715—Uses not provided for elsewhere in C04B2111/00 for fixing bolts or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of lotion fixed length anchoring support method, adopt site prefabrication lotion slurries as Anchor Agent, plastic flexible pipe is inserted in boring, grouting pump is utilized to inject in boring by the lotion slurries configured by plastic flexible pipe, anchor pole/rope is inserted in boring, install pallet, ball pad, anti-attrition pad, nut/ground tackle successively at the revealed section of anchor pole/rope, after lotion grout cures, use stretch-draw instrument to add anchor pole/Suo Jinhang pretension turn round.The lotion slurries adopted have good thixotropy and pumping, relative to traditional packaged type resin anchoring agent, an anchoring difficult problem for breaking surrounding rock can be solved, require low to the jacking force of construction equipment, simultaneously can according to requirement of engineering, the flexible anchorage length selecting to need, and the full length fastening of anchor pole/rope can be realized, make anchor pole/rope to surrouding rock deformation and absciss layer very sensitive, absciss layer and the slip of country rock can be suppressed in time, enhance the compliance of Bolt System to large deformation country rock, solve a deep high stress tunnel supporting difficult problem.
Description
Technical field
The present invention relates to a kind of anchoring support method, especially a kind of lotion fixed length anchoring support method being applicable to roadway surrounding rock.
Background technology
Bolt support is as a kind of important support form of colliery tunnel support, the supporting effect in tunnel is significantly improved compared with traditional shed ding support, reduce roadway support cost, alleviate labor strength, the Bolt System development comprising monomer anchor pole, anchor beam (band), anchor beam (band) net and bolting and rope support taking anchor pole as basic supporting form is rapid, be widely used in home and abroad colliery roadway support, become colliery and realize one of requisite key technology of high-yield and high-efficiency.
In recent years along with adopting dark increase, roadway surrounding rock stress increases, a lot of roadway surrounding rock is made to become engineering soft rock, show strong dilatation and strain softening or lasting rheology characteristic, roadway deformation speed is fast, deflection is large, and current Bolt System is usually to hold anchor or to lengthen anchor, anchorage length is limited, thus suitable for surrounding rock large deformation feature is difficult to, surrouding rock deformation was lost efficacy more than starting during more than 200mm, destroy, surrouding rock deformation can not get effective control, part repair of laneway is caused to reach more than 90%, considerably increase support cost, have a strong impact on the safe and efficient production of mine.
Traditional Bolt System adopts resin anchoring agent as main anchorage style, has adhesion strength large, quick solidifying, security reliability advantages of higher.But its anchoring effect depends on the time of the stirring resistance that rig can provide and stirring, and anchorage length limits to some extent, cannot realize the anchoring of longer scope, be difficult to when rock crusher install simultaneously.And when adopting cementing slurry processes to realize full length fastening, there is the problems such as hole-sealing technology complexity, easily race, spillage, therefore cannot realize the anchoring of anchor pole especially in anchor cable length range.Above-mentioned phenomenon has a strong impact on the Surrounding Rock Control effect of Bolt System, particularly cannot solve a supporting difficult problem for deep large deformation soft-rock tunnel.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, provides simple, the easy construction of a kind of method, effective lotion fixed length anchoring support method.
Technical scheme: lotion fixed length anchoring support method of the present invention, is included in boring on the scar of tunnel, clear hole, also comprises the steps:
A, prepare lotion slurries at the scene;
Insert plastic flexible pipe in b, boring on the scar of described tunnel, and plastic flexible pipe is inserted the bottom of boring;
C, according to boring, anchor pole/rope diameter and design anchorage length calculate required lotion slurries injection rate, starting grouting pump injects in boring by the lotion slurries configured by plastic flexible pipe, lotion slurries injection rate is controlled by the metering device on grouting pump, inject while plastic flexible pipe is slowly extracted out, fill up the space of extracting plastic flexible pipe out to make lotion slurries;
D, inserted in boring anchor pole/rope, the lotion slurries extruded are filled in the annulus around anchor pole/rope, install pallet, ball pad, anti-attrition pad, nut/ground tackle successively at the revealed section of anchor pole/rope;
E, after lotion grout cures, use stretch-draw instrument to anchor pole/Suo Jinhang pretension.
Described lotion slurries are configured in mass ratio formed by water, cement, anchoring additive, accelerating admixture, and Qi Zhongshui, cement ratio is 0.25 ~ 0.35, and anchoring additive is 3% ~ 5% of cement amount, and accelerating admixture is 2% ~ 3% of cement amount.
Beneficial effect: the lotion injection slurry adopted in the present invention is different from ordinary Portland cement slurries, there is good thixotropy and mobility, its Marsh funnel viscosity value can reach about 50s, stream pendant phenomenon can not be there is because of gravity effect, thus the anchor note of deep hole is particularly suitable for, do not need extra hole-sealing technology, ordinary Portland cement slurries can be effectively avoided easily to run problem leakage, arbitrarily anchorage length can be adjusted by controlling grouting amount, realize fixed length anchoring, especially the anchoring in anchor pole/rope length range can be realized in the high stress tunnel of deep, effectively improve the compliance of anchor pole/rope to large deformation, enhance the system stiffness of bolt support.Lotion slurries of the present invention require low without the need to stirring to the working resistance of construction equipment, can according to requirement of engineering, the anchorage length that flexible selection is applicable to, and the full length fastening of anchor pole/rope can be realized, make anchor pole/rope to surrouding rock deformation and absciss layer very sensitive, absciss layer and the slip of country rock can be suppressed in time, enhance the compliance of Bolt System to large deformation country rock, effectively can improve the supporting effect in tunnel, solve a deep high stress tunnel supporting difficult problem.The anchoring that the present invention both can be used for bottom tunnel and portion of side holes, also can be used for the anchoring of top plate drilling, is also applicable in the surrounding rock supporting of other geotechnical engineerings.Effectively can solve that the anchorage length that existing bolt support technology exists is limited, the problem of the deformation of the surrounding rock in tunnel that can not adapt under the condition of high ground stress of deep.Its method is simple, easy to operate, effective, has practicality widely.
Accompanying drawing explanation
Fig. 1 is slip casting process schematic of the present invention;
Fig. 2 is anchor pole/rope scheme of installation.
In figure: 1. tunnel scar, 2. hole, 3. plastic flexible pipe, 4. lotion slurries, 5. anchor pole/rope, 6. pallet, 7. ball pad, 8. anti-attrition pad, 9. nut/ground tackle.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Embodiment 1,
(1) prepare lotion slurries 4 at the scene, be 0.25 carry out mixing slurry by water, cement quality ratio, get cement 2000 grams, 500 grams, water, the FLOWCABLE anchoring additive 60 grams produced by BASF AG, accelerating admixture 40 grams, namely obtains required lotion slurries 4 after stirring completely;
(2) at tunnel scar 1 construction drill 2, bore diameter is 28mm, and drilling depth is 2750mm, and clear hole;
(3) be the bottom that 22mm plastic flexible pipe 3 inserts boring 2 by internal diameter 15mm external diameter;
(4) according to diameter and the anchorage length of boring 2, anchor pole/rope 5, required lotion slurries injection rate is calculated by following formula,
In formula
s-lotion slurries injection rate;
d-bore diameter;
d-anchor pole/rope diameter;
l-anchorage length
Get that bore diameter is 28mm, anchor pole/rope diameter is 22mm, design anchorage length is 1800mm, lotion slurries injection rate can be obtained and be about 0.42L, start grouting pump by the lotion slurries 4 that configure by plastic flexible pipe 3 injection hole 2, lotion slurries 4 injection rate is controlled by the metering device on grouting pump, inject while plastic flexible pipe 3 is slowly extracted out, fill up the space of extracting plastic flexible pipe 3 out to make lotion slurries 4;
(5) anchor pole/rope 5 of to be 22mm length by diameter be 2800mm inserts in boring 2, and the lotion slurries 4 extruded just are filled in the annulus around anchor pole/rope 5, install pallet 6, ball pad 7, anti-attrition pad 8, nut 9 successively at the revealed section of anchor pole/rope 5;
(6) after lotion slurries 4 solidify, with pneumatic impact wrench or stretch-draw instrument, pretightning force is applied to anchor pole/rope again after about 30min.
Embodiment 2,
Substantially the same manner as Example 1, exist together mutually slightly.Difference: be 0.3 carry out mixing slurry by water ash mass ratio, get cement 2000 grams, 600 grams, water, the FLOWCABLE anchoring additive 60 grams produced by BASF AG, accelerating admixture 40 grams, namely obtains required lotion slurries 4 after stirring completely.
Embodiment 3,
Substantially the same manner as Example 1, exist together mutually slightly.Difference: be 0.35 carry out mixing slurry by water ash mass ratio, get cement 2000 grams, 700 grams, water, the FLOWCABLE anchoring additive 60 grams produced by BASF AG, accelerating admixture 40 grams, namely obtains required lotion slurries 4 after stirring completely.
Claims (1)
1. a lotion fixed length anchoring support method, is included in the upper boring (2) of tunnel scar (1), clear hole, it is characterized in that:
A, prepare lotion slurries (4) at the scene, described lotion slurries are configured in mass ratio formed by water, cement, anchoring additive, accelerating admixture, wherein water, cement ratio are 0.25 ~ 0.35, and anchoring additive is 3% ~ 5% of cement amount, and accelerating admixture is 2% ~ 3% of cement amount;
Insert plastic flexible pipe (3) in b, boring on described tunnel scar (1), and plastic flexible pipe (3) is inserted the bottom of boring (2);
C, according to boring (2), the diameter of anchor pole/rope (5) and anchorage length, calculate required lotion slurries injection rate by following formula,
In formula:
s-lotion slurries injection rate,
d-bore diameter,
d-anchor pole/rope diameter,
l-anchorage length;
Start grouting pump by the lotion slurries (4) that configure by plastic flexible pipe (3) injection hole (2), lotion slurries (4) injection rate is controlled by the metering device on grouting pump, inject while plastic flexible pipe (3) is slowly extracted out, fill up the space of extracting plastic flexible pipe (3) out to make lotion slurries (4);
D, by anchor pole/rope (5) insert boring in, the lotion slurries (4) extruded are filled in anchor pole/rope (5) annulus around, install pallet (6), ball pad (7), anti-attrition pad (8), nut/ground tackle (9) successively at the revealed section of anchor pole/rope (5);
E, solidify rear use stretch-draw instrument until lotion slurries (4) pretension is carried out to anchor pole/rope (5).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093906.8A CN103161484B (en) | 2013-03-22 | 2013-03-22 | A kind of lotion fixed length anchoring support method |
| PCT/CN2013/081725 WO2014146392A1 (en) | 2013-03-22 | 2013-08-19 | Paste fixed-length anchoring supporting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093906.8A CN103161484B (en) | 2013-03-22 | 2013-03-22 | A kind of lotion fixed length anchoring support method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103161484A CN103161484A (en) | 2013-06-19 |
| CN103161484B true CN103161484B (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310093906.8A Active CN103161484B (en) | 2013-03-22 | 2013-03-22 | A kind of lotion fixed length anchoring support method |
Country Status (2)
| Country | Link |
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| CN (1) | CN103161484B (en) |
| WO (1) | WO2014146392A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161484B (en) * | 2013-03-22 | 2015-08-19 | 中国矿业大学 | A kind of lotion fixed length anchoring support method |
| CN103758549B (en) * | 2014-01-09 | 2016-09-28 | 中国矿业大学 | Anchor prestressing force full-length anchorage support method after a kind of first filling based on ointment material |
| CN105257325A (en) * | 2015-11-02 | 2016-01-20 | 新汶矿业集团有限责任公司协庄煤矿 | Anchor rod anchoring device for surrounding rock of roadway and anchoring method of anchor rod anchoring device |
| CN105863693A (en) * | 2016-05-09 | 2016-08-17 | 美亚高新材料股份有限公司 | Full-length anchoring supporting method for deep high-stress roadway |
| CN111022848B (en) * | 2019-12-03 | 2021-10-26 | 北京中科富海低温科技有限公司 | Fixing device and cold box |
| CN112922651A (en) * | 2021-04-23 | 2021-06-08 | 辽宁工程技术大学 | Anchor rod supporting process for driving face |
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| CN102503324B (en) * | 2011-11-22 | 2014-07-09 | 中建材中岩科技有限公司 | Anchoring grouting material as well as preparation method and application thereof |
| CN103161484B (en) * | 2013-03-22 | 2015-08-19 | 中国矿业大学 | A kind of lotion fixed length anchoring support method |
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2013
- 2013-03-22 CN CN201310093906.8A patent/CN103161484B/en active Active
- 2013-08-19 WO PCT/CN2013/081725 patent/WO2014146392A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2014146392A1 (en) | 2014-09-25 |
| CN103161484A (en) | 2013-06-19 |
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