CN103161484A - Pasty fluid fixed-length anchoring supporting method - Google Patents

Pasty fluid fixed-length anchoring supporting method Download PDF

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Publication number
CN103161484A
CN103161484A CN2013100939068A CN201310093906A CN103161484A CN 103161484 A CN103161484 A CN 103161484A CN 2013100939068 A CN2013100939068 A CN 2013100939068A CN 201310093906 A CN201310093906 A CN 201310093906A CN 103161484 A CN103161484 A CN 103161484A
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CN
China
Prior art keywords
lotion
slurries
anchoring
flexible pipe
rope
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Application number
CN2013100939068A
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Chinese (zh)
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CN103161484B (en
Inventor
张农
薛飞
阚甲广
赵一鸣
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN201310093906.8A priority Critical patent/CN103161484B/en
Publication of CN103161484A publication Critical patent/CN103161484A/en
Priority to PCT/CN2013/081725 priority patent/WO2014146392A1/en
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Publication of CN103161484B publication Critical patent/CN103161484B/en
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    • 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 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

Abstract

Disclosed is a pasty fluid fixed-length anchoring supporting method. Pasty fluid size prefabricated on site is adopted as an anchoring agent, a plastic flexible pipe is inserted in a drill hole, and the well collocated pasty fluid size is injected in the drill hole by an injection pump through the plastic flexible pipe. An anchor rod/anchor cable is inserted in the drill hole, a tray, a spherical cushion, an anti-attrition gasket, and a nut/ground tackle are installed on an exposed part of the anchor rod/anchor cable in sequence, and pre-tightening and repeated twisting are carried out on the anchor rod/anchor cable through a stretch-draw device after the pasty fluid size is solidified. The adopted pasty fluid size has good thixotropy and pumping performance. Compared with a traditional packaging type resin anchoring agent, by means of the pasty fluid size, the anchoring problem of breaking surrounding rock can be solved, and requirements on jacking force of construction equipment is low. The needed anchoring length can be selected flexibly according to requirements of a project at the same time, and the overall-length anchoring of the anchor rod/anchor cable can be achieved, so that the anchor rod/anchor cable is enabled to be sensitive to deformation and layer separation of the surrounding rock, and layer separation and sliding of the surrounding rock can be hampered in time. Adaptability of an anchor rod supporting system to the surrounding rock with large deformation is improved, and the problem of heavily stressed roadway supporting in a deep position is solved.

Description

A kind of lotion fixed length anchoring support method
Technical field
The present invention relates to a kind of anchoring support method, especially a kind of lotion fixed length anchoring support method that is applicable to roadway surrounding rock.
Background technology
Bolt support is as a kind of important support form of colliery tunnel support, compare with traditional shed ding support the supporting effect that has significantly improved the tunnel, reduced the roadway support cost, alleviated labor strength, the Bolt System development that comprises monomer anchor pole, anchor beam (band), anchor beam (band) net and bolting and rope support take anchor pole as the basic supporting form rapidly, be widely used in home and abroad colliery roadway support, become the 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, make a lot of roadway surrounding rocks become the engineering soft rock, show strong dilatation and strain softening or lasting rheology characteristic, roadway deformation speed is fast, deflection is large, and present Bolt System is usually to hold anchor or to lengthen anchor as main, anchorage length is limited, thereby be difficult to suitable for surrounding rock large deformation characteristics, surrouding rock deformation begins when above over 200mm to lose efficacy, destroy, surrouding rock deformation can not get effective control, cause the part repair of laneway to reach more than 90%, greatly increased 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 stirring resistance that rig can provide and the time of stirring, and anchorage length limits to some extent, can't realize growing the anchoring of scope, is difficult to simultaneously install when rock crusher.And exist the problems such as hole-sealing technology complexity, easily races, spillage when adopting the cement injection method to realize full length fastening, therefore can't realize the especially interior anchoring of anchor cable length range of anchor pole.Above-mentioned phenomenon has a strong impact on the Surrounding Rock Control effect of Bolt System, particularly can't solve the supporting difficult problem of deep large deformation soft-rock tunnel.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in prior art, provide that a kind of method is simple, easily construction, effective lotion fixed length anchoring support method.
Technical scheme: lotion fixed length anchoring support method of the present invention, be included in boring on the scar of tunnel, clear hole, also comprise the steps:
A, prepare the lotion slurries at the scene;
Insert plastic flexible pipe in b, the 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 the design anchorage length calculate required lotion slurries injection rate, starting grouting pump injects by plastic flexible pipe the lotion slurries that configure in boring, lotion slurries injection rate is controlled by the metering device on grouting pump, while injecting, plastic flexible pipe is slowly extracted out, so that the lotion slurries fill up the space of extracting plastic flexible pipe out;
D, anchor pole/rope is inserted in boring, the lotion slurries of extruding are filled in annulus around anchor pole/rope, install successively pallet, ball pad, anti-attrition pad, nut/ground tackle at the revealed section of anchor pole/rope;
E, solidify rear use stretch-draw instrument to anchor pole/Suo Jinhang pretension until the lotion slurries.
Described lotion slurries are to be configured in mass ratio and formed by water, cement, anchoring additive, accelerating admixture, and wherein water, cement ratio are 0.25 ~ 0.35, and the anchoring additive is 3% ~ 5% of cement amount, and accelerating admixture is 2% ~ 3% of cement amount.
beneficial effect: the lotion injection slurry that adopts in the present invention is different from the ordinary Portland cement slurries, have thixotropy and mobility preferably, its Marsh funnel viscosity value can reach the 50s left and right, can stream pendant phenomenon not appear because of gravity effect, thereby the anchor that is particularly suitable for deep hole is annotated, do not need extra hole-sealing technology, can effectively avoid the ordinary Portland cement slurries easily to run leakage problem, can arbitrarily adjust anchorage length by controlling grouting amount, realize the fixed length anchoring, especially can realize the anchoring in anchor pole/rope length range in the high stress tunnel of deep, effectively improved the compliance of anchor pole/rope to large deformation, strengthened the system stiffness of bolt support.The working resistance that lotion slurries of the present invention need not to stir construction equipment requires low, can be according to requirement of engineering, the anchorage length that flexible choice is fit to, and can realize the full length fastening of anchor pole/rope, make anchor pole/rope very sensitive to surrouding rock deformation and absciss layer, can in time suppress absciss layer and the slip of country rock, strengthened the compliance of Bolt System to the large deformation country rock, can effectively improve the supporting effect in tunnel, solve a deep high stress tunnel supporting difficult problem.The present invention both can be used for the anchoring of bottom, tunnel and the boring of section of side, also can be used for the anchoring of top plate drilling, also was applicable in the surrounding rock supporting of other geotechnical engineerings.Can effectively solve the problem that the anchorage length that has the bolt support technology existence now is limited, can not adapt to the deformation of the surrounding rock in tunnel under the condition of high ground stress of deep.Its method is simple, easy to operate, effective, has practicality widely.
Description of drawings
Fig. 1 is slip casting process schematic diagram of the present invention;
Fig. 2 is anchor pole/rope scheme of installation.
In figure: 1. tunnel scar, 2. boring, 3. plastic flexible pipe, 4. lotion slurries, 5. anchor pole/rope, 6. pallet, 7. ball pad, 8. anti-attrition pad, 9. nut/ground tackle.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Embodiment 1,
(1) preparing at the scene lotion slurries 4, is 0.25 to mix slurry by water, cement quality ratio, gets cement 2000 grams, water 500 grams, by FLOWCABLE anchoring additive 60 grams that BASF AG produces, accelerating admixture 40 grams namely get required lotion slurries 4 after stirring fully;
(2) at tunnel scar 1 construction drill 2, bore diameter is 28mm, and drilling depth is 2750mm, and clear hole;
(3) with internal diameter 15mm external diameter be the bottom that 22mm plastic flexible pipe 3 inserts boring 2;
(4) according to diameter and the anchorage length of boring 2, anchor pole/rope 5, 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
Getting bore diameter is that 28mm, anchor pole/rope diameter are 22mm, the design anchorage length is 1800mm, can get lotion slurries injection rate and be about 0.42L, starting grouting pump passes through the lotion slurries 4 that configure in plastic flexible pipe 3 injection holes 2, lotion slurries 4 injection rates are controlled by the metering device on grouting pump, while injecting, plastic flexible pipe 3 is slowly extracted out, so that lotion slurries 4 fill up the space of extracting plastic flexible pipe 3 out;
(5) be that 22mm length is that anchor pole/rope 5 of 2800mm inserts in boring 2 with diameter, the lotion slurries 4 of extruding just are filled in annulus around anchor pole/rope 5, install successively pallet 6, ball pad 7, anti-attrition pad 8, nut 9 at the revealed section of anchor pole/rope 5;
(6) after solidifying rear approximately 30min, lotion slurries 4 with pneumatic impact wrench or stretch-draw instrument, anchor pole/rope is applied pretightning force again.
Embodiment 2,
Substantially the same manner as Example 1, exist together mutually slightly.Difference: be 0.3 to mix slurry by water ash mass ratio, get cement 2000 grams, water 600 grams, by FLOWCABLE anchoring additive 60 grams that BASF AG produces, accelerating admixture 40 grams namely get required lotion slurries 4 after stirring fully.
Embodiment 3,
Substantially the same manner as Example 1, exist together mutually slightly.Difference: be 0.35 to mix slurry by water ash mass ratio, get cement 2000 grams, water 700 grams, by FLOWCABLE anchoring additive 60 grams that BASF AG produces, accelerating admixture 40 grams namely get required lotion slurries 4 after stirring fully.

Claims (2)

1. a lotion fixed length anchoring support method, be included in the upper boring of tunnel scar (1) (2), clear hole, it is characterized in that:
A, prepare lotion slurries (4) at the scene;
Insert plastic flexible pipe (3) in b, the boring on described tunnel scar (1), and plastic flexible pipe (3) is inserted the bottom of boring (2);
C, calculate required lotion slurries (4) injection rate according to boring (2), anchor pole/rope (5) diameter and design anchorage length, starting grouting pump passes through the lotion slurries (4) that configure in plastic flexible pipe (3) injection hole (2), lotion slurries (4) injection rate is controlled by the metering device on grouting pump, while injecting, plastic flexible pipe (3) is slowly extracted out, so that lotion slurries (4) fill up the space of extracting plastic flexible pipe (3) out;
D, anchor pole/rope (5) is inserted in boring, the lotion slurries (4) of extruding are filled in anchor pole/rope (5) annulus on every side, install successively pallet (6), ball pad (7), anti-attrition pad (8), nut/ground tackle (9) at the revealed section of anchor pole/rope (5);
E, solidify rear use stretch-draw instrument until lotion slurries (4) anchor pole/rope (5) is carried out pretension.
2. a kind of lotion fixed length anchoring support method according to claim 1, it is characterized in that: described lotion slurries are to be configured in mass ratio and formed by water, cement, anchoring additive, accelerating admixture, wherein water, cement ratio are 0.25 ~ 0.35, the anchoring additive is 3% ~ 5% of cement amount, and accelerating admixture is 2% ~ 3% of cement amount.
CN201310093906.8A 2013-03-22 2013-03-22 A kind of lotion fixed length anchoring support method Active CN103161484B (en)

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

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758549A (en) * 2014-01-09 2014-04-30 中国矿业大学 Sequential filling-anchoring prestress full-length anchorage supporting method on basis of paste materials
WO2014146392A1 (en) * 2013-03-22 2014-09-25 中国矿业大学 Paste fixed-length anchoring supporting method
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
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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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

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2014146392A1 (en) * 2013-03-22 2014-09-25 中国矿业大学 Paste fixed-length anchoring supporting method
CN103758549A (en) * 2014-01-09 2014-04-30 中国矿业大学 Sequential filling-anchoring prestress full-length anchorage supporting method on basis of paste materials
WO2015103862A1 (en) * 2014-01-09 2015-07-16 中国矿业大学 Method for supporting by means of full-length pre-stressed anchorage with paste material being first poured and last anchored
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
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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