CN108661682A - A kind of weak cementing rich water top plate anchor cable hole grouting water blocking method - Google Patents
A kind of weak cementing rich water top plate anchor cable hole grouting water blocking method Download PDFInfo
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- CN108661682A CN108661682A CN201810409903.3A CN201810409903A CN108661682A CN 108661682 A CN108661682 A CN 108661682A CN 201810409903 A CN201810409903 A CN 201810409903A CN 108661682 A CN108661682 A CN 108661682A
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- anchor cable
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- anchor
- slip casting
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000000903 blocking effect Effects 0.000 title claims abstract description 19
- 238000007569 slipcasting Methods 0.000 claims abstract description 43
- 238000004873 anchoring Methods 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 239000011378 shotcrete Substances 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000000523 sample Substances 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 5
- 239000011083 cement mortar Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims 1
- 238000009955 starching Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000009120 camo Nutrition 0.000 description 2
- 235000005607 chanvre indien Nutrition 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011487 hemp Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of weak cementing rich water top plate anchor cable hole grouting water blocking method, it is therefore an objective to solve weak cementing rich water top plate anchor cable hole water drenching support issues and anti-anchor cable gets rusty；The method of the present invention is the comprehensive length and diameter for determining required solid cable body during endoscope probe insertion has drilled；Gunite concrete enclosing tunnel immediately after tunnel excavates, beats and carries out secondary injection concrete after anchor pole linked network again；Anchor cable drilling is carried out in back surface direction in back using anchor cable rig；Solid cable body is packed into the anchor cable hole accomplished fluently, and is fully anchored with hard surrounding rock by the anchoring cartridge of anchor cable end；Rigid circular pipe is installed successively, meets slurry expansion type stop grouting plug, slip casting pallet and lockset, seals aperture；Tensioner is pre-tightened mounted in solid cable body revealed section tensioning；Slip casting is carried out to the anchor cable hole slip casting section between anchoring section and stop grouting plug, prevents the water in top plate water-bearing layer from infiltrating into top plate coal petrography by anchor cable hole, to play the role of waterproof water blockoff.
Description
Technical field
The present invention relates to coal mine down-hole tunnel surrounding rock supporting technical field, specially a kind of weak cementing rich water top plate anchor cable hole
Grouting water blocking method.
Background technology
The stabilization of roadway surrounding rock is that country rock and prop are coefficient as a result, country rock inherently supporting construction or supporting
The indivisible important component of structure.The supporting of coal mine roadway experienced log hut supporting, build and condemn supporting, shaped steel supporting to anchor
Bar（Rope）The lengthy procedure of supporting.With small aperture anchor support technology and the maturation of supporting technology, resin anchoring agent anchor cable branch
The application protected in mine working, tunnel, underground chamber and other underground structures is more and more extensive.Using resin anchoring agent
Small aperture anchor supporting has the advantages that construction equipment is easy, speed of application is fast, anchoring effect is good low with labor intensity etc..With
Being continuously increased for roadway excavation depth, the case where roadway surrounding rock is in water-bearing layer more and more, weak cementing rich water roadway in the roof
There are following characteristics, and Seam Roof And Floor first is mostly the weak cementing soft rock such as charcoal mudrock, packsand, mud stone, silty, this
Class soft rock forms unique physico-mechanical properties, more complete under native state, has certain green strength, but easily disturb
Dynamic, easy-weathering meets the easy argillization of water and disintegration, and for most of rock mostly based on argillaceous agglutination, lithology is poor；Secondly when anchor cable hole is long
Between a large amount of water drenchings, be easy to make Anchor Cable Anchorage and the body of rod that corrosion and corrosion occurs, lead to intermediate plate locking failure, cause anchorage, pallet
It glides, hidden trouble is brought to mine safety；In addition, roof water infiltrates into top plate coal petrography by anchor cable hole, top plate is met after water easily
Softening, disintegration cause roadway support difficult.The method used at present to solve this problem mainly has top plate grouting for water blocking and adopts
Anchor cable is anchored with slip casting.Since the general distribution in top plate water-bearing layer is wider, and saturation state changes greatly, using top plate slip casting
Method it is of high cost, effect is poor and influences normal tunnelling again.Anchor cable is anchored using slip casting, anchor cable body is hollow structure, anchor
Tenacity is relatively low, and operational procedure is complicated, and when anchor cable hole water drenching is larger, and slip casting effect is not easy to control, is subsequent exploitation
Safety has buried hidden danger.
Invention content
The invention aims to overcome the shortcomings of above-mentioned prior art, weak cementing rich water top plate anchor can be solved by providing one kind
Rope hole water drenching support issues, anti-anchor cable get rusty and realize the weak cementing rich water top plate of one kind of anchor cable high intensity overall length pretightning force anchoring
Anchor cable hole grouting water blocking method.
The method of the present invention is as follows：
（1）Drilling is pried through：Endoscope probe is inserted into having drilled and is gradually goed deep into, by detecting bore inner damage and structure
Situation, and shown, recorded and stored by image, so that it is determined that the developmental state of the position in top plate water-bearing layer and crack,
After considering the parameters such as stress state and mechanical property, anchor cable laying mode residing for drift section size, country rock again, then determine
The length and diameter of solid cable body.
（2）Whitewashing enclosing tunnel surface：Tunnel carries out the gunite concrete enclosing tunnel of first time immediately after excavating, just first
Thickness 45-55mm is sprayed, beats and carries out second of gunite concrete after anchor pole linked network again, spray 45-55mm again, gunite concrete is total twice
Thickness is 100mm.
（3）Play anchor cable drilling：It is drilled in back construction anchor cable using MFC-1392/3657 anchor cable rigs, anchor cable bores
Hole is perpendicular to back surface.The parameter of drilling is determined according to the specification of the length of anchor cable, diameter and drilling machine.
（4）Anchor anchor cable：Solid cable body is packed into the anchor cable hole accomplished fluently, and by the anchoring cartridge of anchor cable end with it is hard
Country rock fully anchors；Anchorage cable anchoring section（Refer to anchoring cartridge by the region of anchor cable and country rock anchoring）It should be on water-bearing layer top；It is solid
Cable body protruded length is 150mm-200mm.
（5）Water blockoff structure is installed：Rigid circular pipe is installed successively in anchor cable drilling, meets slurry expansion type stop grouting plug, slip casting support
Disk and lockset, seal aperture.
（6）Stretch-draw anchor：MQ18-200/63 tensioners are mounted on solid cable body revealed section, by lockset to solid
Cable body carries out tensioning preload.
（7）Slip casting：Slip casting is carried out to the slip casting section of anchor cable hole by the injected hole and rigid circular pipe of slip casting pallet, prevents top
The water in plate water-bearing layer infiltrates into top plate coal petrography by anchor cable hole, to play the role of waterproof water blockoff.Slip casting section is located at anchoring section
Between stop grouting plug.Injection slurry uses the ratio of mud（Mass ratio）1-1.1:1 cement mortar and density 1.50g/cm3Waterglass with
1:The mass ratio of 0.5-0.8 is formulated, and is advisable with filling hole and solidifying.
The used slip casting pallet of the above method is the butterfly pallet with injected hole, and slip casting pallet is sleeved on solid cable body；
Anchor cable hole grouting pipeline is rigid circular pipe, is installed in anchor cable drilling by injected hole.Lockset is located at slip casting pallet lower part, lockset
Inner surface has the internal thread that matches with solid cable body outer surface, and slip casting pallet is fixed by lockset, and to solid cable body into
Row tensioning pre-tightens.Meet the rope made of hemp or other materials plug that slurry expansion type stop grouting plug is orifice position winding.Pass through slip casting pallet
Injected hole and rigid circular pipe to slip casting section slip casting.Anchorage cable anchoring section should be located at anchoring section on water-bearing layer top, slip casting section and stop
Between slurry plug.
The method of the present invention can solve the problems, such as the insurmountable weak cementing rich water top plate anchor cable hole water drenching of general method for protecting support,
A kind of weak cementing rich water top plate anchor cable hole grouting for water blocking structure and grouting water blocking method are provided, is suitable for top plate rich in water and more
It is used for the tunnel of the weak cementing soft rock such as charcoal mudrock, packsand, mud stone, silty.Anchor cable hole may be implemented in the present invention
Grouting for water blocking, make in top plate water be restored to original state, to prevent anchor cable from getting rusty, intermediate plate locking failure, realize that anchor cable is high
Intensity overall length pretightning force anchors, and controlroof country rock effect is good；Anchor cable is anchored compared to top plate grouting for water blocking and slip casting, except supporting is strong
Outside degree height and convenient construction, also there is simple in structure, easy to process, lower-cost advantage.
Description of the drawings
Fig. 1 is constructing structure schematic diagram of the present invention.
In figure：1, solid cable body, 2, anchorage cable anchoring section, 3, anchor rope grouting section, 4, rigid circular pipe, 5, slip casting pallet, 6, note
Starch hole, 7, lockset, 8, meet slurry expansion type stop grouting plug, 9, top plate water-bearing layer.
Specific implementation mode
The big 111801 haulage gate roof and floor of South Lake mine in Hami is mostly weak cementing rock stratum, and country rock cementing properties is poor, intensity is relatively low,
Surrounding Rock Strength further weakens under the influence of top plate water-bearing layer, causes roadway support difficult.Pass through roadway layout weep hole collection
In it is hydrophobic can alleviate roof timbering problem, but the infiltration of roof water, which is appointed, can so corrode weak cementing rock stratum, this weak to reduce
Change effect and improve Surrounding Rock Strength, by the method for the invention anchor cable hole grouting for water blocking combination anchor cable the extensible bolting, the whitewashing of tunnel surface
The small-scale water conservation of back is realized in equal measures, and circulating water is become influence of the Static Water reduction to anchoring body intensity.Using
Anchor cable specification is 19 strands of steel strand wires small-bore prestress anchorage cables of Φ 21.6mm × L6300mm, and every anchor cable matches one piece
Specification is one piece of the dish-like slip casting anchor pallets of 300 × 300 × 16mm, and hemispherical high intensity adjusting center washer and lockset are a set of, top plate
Array pitch is 1400mm × 1600mm between anchor cable, and it is 200KN that anchor cable, which applies pretightning force,.The mine is proved by type approval test：Using
Back grouting cable anchor of the present invention rationally water conservation+water drenching amount is big and has control conducive to hydrophobic tunnel lower centralized arrangement weep hole
The Comprehensive Control Technology that hydrophobic+high-performance high-reliability bolting and rope support is combined is good to the control effect of roadway surrounding rock.
The specific steps are：
（1）Drilling is pried through：9 position of top plate water-bearing layer, roof fracture etc. are observed, 9 position of top plate water-bearing layer is closer away from back
When, it is to be ensured that anchorage cable anchoring section 2 should be on 9 top of top plate water-bearing layer.
（2）Whitewashing enclosing tunnel surface：Linked network suspension roof support immediately after tunnel excavates, carries out the gunite concrete of first time
Enclosing tunnel first just sprays 50mm, beats and carry out second of gunite concrete after anchor pole linked network again, spray 50mm again, spray coagulation twice
Native overall thickness is 100mm.
（3）Play anchor cable drilling：It is drilled in back construction anchor cable using anchor cable rig, anchorage cable anchoring section should contain in top plate
9 top of water layer.
（4）Anchor anchor cable：Anchor cable is packed into the anchor cable hole accomplished fluently in advance, is fully anchored, 1 protruded length of solid cable body is
200mm。
（5）Water blockoff structure is installed：Grouting pipeline 4 is installed successively, meets slurry expansion type stop grouting plug 8, slip casting pallet 5 and lockset 7,
Seal aperture.
（6）Stretch-draw anchor：Tensioning preload is carried out to solid cable body 1 by lockset 7 using tensioner.
Slip casting：Slip casting is carried out to anchor cable hole by rigid circular pipe 4, cement mortar and silicate ratio are 1 in slurries:0.5, note
Slurry amount is advisable with filling hole and solidifying.
Slip casting pallet 5 used is the butterfly pallet with injected hole 6, and slip casting pallet 5 is sleeved on solid cable body 1；Rigidity circle
Pipe 4 is anchor cable hole grouting pipeline, is installed in anchor cable drilling by injected hole 6.Lockset 7 is located at slip casting pallet lower part, in lockset 7
Surface has the internal thread to match with 1 outer surface of solid cable body, fixes slip casting pallet 5 by lockset, and to anchor cable Shu Jinhang
Tensioning pre-tightens.Slurry expansion type stop grouting plug 8 is met as the rope made of hemp or other materials plug of orifice position winding.Pass through slip casting pallet 5
Injected hole 6 and rigid circular pipe 4 to 3 slip casting of slip casting section.Anchorage cable anchoring section 2 should be located at anchoring section on water-bearing layer top, slip casting section 3
Between 2 and chance slurry expansion type stop grouting plug 8.
Claims (8)
1. a kind of weak cementing rich water top plate anchor cable hole grouting water blocking method, it is characterized in that：
（1）Drilling is pried through：Endoscope probe is inserted into having drilled and is gradually goed deep into, by detecting bore inner damage and structure
Top plate water-bearing layer position and fractured situation are determined, with the length and diameter of solid cable body required for comprehensive determine；
（2）Whitewashing enclosing tunnel surface：Gunite concrete enclosing tunnel immediately after tunnel excavates, beats and carries out two after anchor pole linked network again
Secondary gunite concrete；
（3）Play anchor cable drilling：Anchor cable drilling is carried out in back surface direction in back using anchor cable rig；
（4）Anchor anchor cable：Solid cable body is packed into the anchor cable hole accomplished fluently, and the anchoring cartridge and hard surrounding rock for passing through anchor cable end
Fully anchoring；Anchoring cartridge is by anchor cable and the anchorage cable anchoring section of country rock anchoring on water-bearing layer top；
（5）Water blockoff structure is installed：Rigid circular pipe is installed successively, meets slurry expansion type stop grouting plug, slip casting pallet and lockset, seals hole
Mouthful；
（6）Stretch-draw anchor：Tensioner is mounted on solid cable body revealed section, it is pre- to carry out tensioning to solid cable body by lockset
Tightly；
（7）Slip casting：The anchor cable hole between anchoring section and stop grouting plug is noted by injected hole on slip casting pallet and rigid circular pipe
It starches section and carries out slip casting, prevent the water in top plate water-bearing layer from infiltrating into top plate coal petrography by anchor cable hole, to play the work of waterproof water blockoff
With.
2. weak cementing rich water top plate anchor cable hole grouting water blocking method as described in claim 1, it is characterized in that anchor cable hole slip casting
When Duan Jinhang slip castings, slurries add waterglass to be formulated using cement mortar, and configuration proportion is advisable with filling hole and solidifying.
3. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that being noted to anchor cable hole
When starching section progress slip casting, injection slurry uses ratio of mud 1-1.1:1 cement mortar and density 1.50g/cm3Waterglass with 1:0.5-
0.8 mass ratio is formulated.
4. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that playing anchor cable drilling
When used anchor cable rig model and type be MFC-1392/3657.
5. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that when stretch-draw anchor
The model of used tensioner is MQ18-200/63.
6. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that whitewashing closing lane
When road surface, just the thickness of spray or secondary injection concrete is 45-55mm, and gunite concrete overall thickness is 90- twice
110mm。
7. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that anchoring anchor cable
When, solid cable body protruded length is 150mm-200mm.
8. weak cementing rich water top plate anchor cable hole grouting water blocking method as claimed in claim 1 or 2, it is characterized in that used slip casting
Pallet is the butterfly pallet with injected hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810409903.3A CN108661682B (en) | 2018-05-02 | 2018-05-02 | Grouting water plugging method for anchor cable hole of weakly cemented water-rich roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810409903.3A CN108661682B (en) | 2018-05-02 | 2018-05-02 | Grouting water plugging method for anchor cable hole of weakly cemented water-rich roof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108661682A true CN108661682A (en) | 2018-10-16 |
| CN108661682B CN108661682B (en) | 2024-05-28 |
Family
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|---|---|---|---|
| CN201810409903.3A Active CN108661682B (en) | 2018-05-02 | 2018-05-02 | Grouting water plugging method for anchor cable hole of weakly cemented water-rich roof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252882A (en) * | 2018-11-19 | 2019-01-22 | 河南理工大学 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system and its construction method |
| CN110821536A (en) * | 2019-11-22 | 2020-02-21 | 内蒙古上海庙矿业有限责任公司 | Method for improving anchoring effect of soft rock roadway floor anchor rod |
| CN111139853A (en) * | 2019-12-24 | 2020-05-12 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN113153396A (en) * | 2021-04-19 | 2021-07-23 | 华北科技学院 | Hole sealing, grouting and water plugging reinforcing method for anchor cable holes in roadway water spraying area |
| CN113882883A (en) * | 2021-09-30 | 2022-01-04 | 中国矿业大学 | Fixed-length anchoring system and method for roadway roof in slow seepage or water spraying state |
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| CN208518690U (en) * | 2018-05-02 | 2019-02-19 | 阳泉煤业（集团）有限责任公司 | A kind of weak cementing rich water top plate anchor cable hole grouting for water blocking device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252882A (en) * | 2018-11-19 | 2019-01-22 | 河南理工大学 | 3rd area of breaking surrounding rock tunnel cooperates with coupling supporting system and its construction method |
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| CN110821536A (en) * | 2019-11-22 | 2020-02-21 | 内蒙古上海庙矿业有限责任公司 | Method for improving anchoring effect of soft rock roadway floor anchor rod |
| CN111139853A (en) * | 2019-12-24 | 2020-05-12 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN111139853B (en) * | 2019-12-24 | 2021-03-30 | 同济大学 | High-flow-rate karst pipeline net hanging, stone hooking and grouting combined water plugging method |
| CN113153396A (en) * | 2021-04-19 | 2021-07-23 | 华北科技学院 | Hole sealing, grouting and water plugging reinforcing method for anchor cable holes in roadway water spraying area |
| CN113882883A (en) * | 2021-09-30 | 2022-01-04 | 中国矿业大学 | Fixed-length anchoring system and method for roadway roof in slow seepage or water spraying state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108661682B (en) | 2024-05-28 |
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