CN104847354B - A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole - Google Patents
A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole Download PDFInfo
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- CN104847354B CN104847354B CN201510156783.7A CN201510156783A CN104847354B CN 104847354 B CN104847354 B CN 104847354B CN 201510156783 A CN201510156783 A CN 201510156783A CN 104847354 B CN104847354 B CN 104847354B
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- slip casting
- combined supporting
- anchor pole
- coal pillar
- supporting anchor
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- 239000003245 coal Substances 0.000 title claims abstract description 70
- 238000007569 slipcasting Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 7
- 238000005065 mining Methods 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 7
- 239000011083 cement mortar Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
-
- 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
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Remote Sensing (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Foundations (AREA)
Abstract
The invention discloses a kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole, it is related to strip coal pillar production technique field, devise the structure of slip casting combined supporting anchor pole, and the method using slip casting combined supporting anchor pole lifting strip coal pillar performance, realize the slip casting of strip coal pillar yield region and strip coal pillar yield region, elastic region suspension roof support dual-use function, the bearing capacity of one side yield region is improved, the another aspect slip casting combined supporting anchor pole lateral restriction certain to coal column, coal column is converted into triaxial stress state from two to stress, pillar strength is improved, performance is improved；The top and bottom of coal column are tilted and squeeze into slip casting combined supporting anchor pole, and coal column and top, bottom plate are connected into an entirety after slip casting, limit the transversely deforming of coal column；Slip casting combined supporting anchor structure is simple, and the length of hollow grouting anchor body can be adjusted according to coal pillar width, easy for installation, it is ensured that the bearing capacity of yield region improves, and cost is low, suitably in mining area large-scale promotion application.
Description
Technical field
It is specifically a kind of to be lifted using slip casting combined supporting anchor pole the present invention relates to strip coal pillar production technique field
The method of strip coal pillar performance.
Background technology
Strip coal pillar extraction system is widely used in railways and water-bodies, after working face mining since the edge of coal column
Yield region and elastic region are formed, gradually destruction forms fracture area and expanded bearing block long term for yield region in the presence of by overlying rock load
Greatly, most cause the unstability of coal column at last, cause ground settlement, cause huge harm.The method for strengthening of traditional wide coal column has anchor
Bar reinforcing, grouting and reinforcing, anchor cable reinforcing, bolting with wire mesh etc., but have the drawbacks of certain, the length of anchor pole is to restrict anchor pole to add
Gu the key factor of wide coal column；Grouting support improves the bearing capacity of yield region, but effectively side can not be provided for coal column
To restraining force, it is impossible to limit the development of the yield region of coal column；Cable bolting does not adapt to coal column large deformation and failed, bolting with wire mesh
The development of Yielding Zone of Coal Pillar can not equally be limited.
The content of the invention
To solve above-mentioned technical problem, the invention provides one kind to utilize slip casting combined supporting anchor pole lifting strip band
The method of coal column performance, devises slip casting combined supporting anchor pole, and is realized using it to the slip casting of strip coal pillar yield region
Meanwhile suspension roof support is realized in yield region and elastic region, the performance of many-side lifting strip coal pillar.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：
A kind of slip casting combined supporting anchor pole, includes drill bit, entity anchor bar body and hollow grouting anchor body, and the drill bit is set
The end of entity anchor bar body is placed in, the entity anchor bar body is connected by adapter sleeve with hollow grouting anchor body, the hollow note
Multiple injected holes are uniformly arranged on slurry anchor bar body, the end of the hollow grouting anchor body is provided with stop grouting plug, backing plate and stifled slurry
Plug.
The hollow grouting anchor body is arranged to multiple, between connected by adapter sleeve.
A kind of method that strip coal pillar performance is lifted using upper slip casting combined supporting anchor pole, is achieved by the steps of：
1）After the working face mining of strip coal pillar both sides, more slip casting combined supporting anchor poles are installed as needed, it is wide
In the case of coal column, linked together using more hollow grouting anchor bodies；
2）Slip casting combined supporting anchor pole spacing as needed, array pitch are symmetrically squeezed into coal body both sides, realized to band coal
Post both sides yield region and the suspension roof support in middle spring area；
3）Slip casting combined supporting anchor pole is tilted to top plate and the bottom for squeezing into coal column respectively in the top and bottom of strip coal pillar
Plate, strip coal pillar and top plate, bottom plate are formed into an entirety, limit the transversely deforming of strip coal pillar；
4）Slip casting inside to slip casting combined supporting anchor pole, is first pressed clear water 2-5 minutes before slip casting, rinses crack passage, is used
Low-height-low-grade location, ensure to be full of cement mortar in slip casting combined supporting anchor pole, slip casting terminates, and realizes the note of yield region
Slurry.
It is described to be respectively set to for squeezing into inclination angle between top plate and the slip casting combined supporting anchor pole and top plate, bottom plate of bottom plate
10-30°。
The injecting paste material is from the cement mortar that the ratio of mud is 0.38-0.45.
The present invention devises the structure of slip casting combined supporting anchor pole, and utilizes slip casting combined supporting anchor pole lifting strip band coal
The method of column performance, realize the slip casting of strip coal pillar yield region and strip coal pillar yield region, the dual work(of elastic region suspension roof support
Can, the bearing capacity of one side yield region is improved, another aspect slip casting combined supporting anchor pole it is certain to coal column it is lateral about
Beam force, coal column are converted into triaxial stress state from two to stress, and pillar strength is improved, and performance is improved；
The top and bottom of coal column are tilted and squeeze into slip casting combined supporting anchor pole, and coal column and top, bottom plate are connected into an entirety after slip casting,
Limit the transversely deforming of coal column；Slip casting combined supporting anchor structure is simple, can adjust hollow grouting anchor according to coal pillar width
The length of body, it is easy for installation, it is ensured that the bearing capacity of yield region improves, and cost is low, suitably in mining area large-scale promotion application.
Brief description of the drawings
Fig. 1 is the inventive method structural representation；
Fig. 2 is slip casting combined supporting anchor structure schematic diagram of the present invention.
Embodiment
The present invention will be described in detail with specific embodiment below in conjunction with the accompanying drawings：
As shown in Fig. 2 the slip casting combined supporting anchor pole, includes drill bit 8, entity anchor bar body 9 and hollow grouting anchor body
11, the drill bit 8 is arranged at the end of entity anchor bar body 9, and the entity anchor bar body 9 passes through adapter sleeve 10 and hollow grouting anchor
Body 11 is connected, and multiple injected holes, the end of the hollow grouting anchor body 11 are uniformly arranged in the hollow grouting anchor body 11
It is provided with stop grouting plug 13, backing plate 16 and stifled slurry plug 15.
As preferable mode, the hollow grouting anchor body 11 is arranged to multiple, between connected by adapter sleeve 10.
According to A.H. Wilson's yield region Width Formula of Rib Knitted Fabric, in formula：M be coal seam thickness, h
To adopt depth, the length of the hollow grouting anchor body 11 of slip casting combined supporting anchor pole 4 is, but examine
Consider the influence for the other factors such as adopting, the length for taking hollow grouting anchor body 11 is,For
Discontinuous Factors, take 1 ~ 1.5.The length of the entity anchor bar body 9 of slip casting combined supporting anchor pole 4 takes 1m.
During supporting for adopting deep larger wide coal column, because the width of yield region is larger, we can use adapter sleeve
10 link together isometric hollow grouting anchor body 11 and entity anchor bar body 9.The structure of adapter sleeve 10 is provided with for both ends
Has a female fixing hole, the end of hollow grouting anchor body 11 and entity anchor bar body 9 is provided with screw thread, is hung into adapter sleeve 10
Fixing hole into being fixedly connected.
As shown in figure 1, strip coal pillar both sides goaf 1, yield region 2 and middle spring area 3, utilize slip casting combined supporting anchor
The method that bar lifts strip coal pillar performance, is achieved by the steps of：
1）After the working face mining of strip coal pillar both sides, more slip casting combined supporting anchor poles 4 are installed as needed, it is wide
In the case of coal column, linked together using more hollow grouting anchor bodies 11；
2）Slip casting combined supporting anchor pole 4 spacing as needed, array pitch are symmetrically squeezed into coal body both sides, realized to band coal
Post both sides yield region 2 and the suspension roof support in middle spring area 3；
3）Slip casting combined supporting anchor pole 4 is tilted to the He of top plate 6 for squeezing into coal column respectively in the top and bottom of strip coal pillar
Bottom plate 7, it is preferably described to be used to squeeze into inclination angle point between top plate 6 and the slip casting combined supporting anchor pole 4 and top plate 6, bottom plate 7 of bottom plate 7
10-30 ° is not arranged to, strip coal pillar and top plate 6, bottom plate 7 are formed into an entirety, limit the transversely deforming of strip coal pillar；
4）To the inside slip casting of slip casting combined supporting anchor pole 4, the injecting paste material is from the cement that the ratio of mud is 0.38-0.45
Mortar,
First pressed before slip casting clear water 2-5 minutes, rinse crack passage, improve slip casting effect；Using low-height-low-grade location, prevent
Only pressure influences slip casting effect in high tap position slip casting；Ensure to be full of cement mortar in slip casting combined supporting anchor pole 4, used after the completion of slip casting
Stop grouting plug 13 blocks anchor pole, prevents slurries adverse current, realizes the slip casting of yield region 2.After the completion of slip casting, stifled slurry plug 15 is filled in simultaneously
Nut 14 is tightened, must ensure to be full of cement mortar in hollow grouting anchor body 11.
In summary, the present invention is realized to the slip casting of yield region 2 in the case where make use of slip casting combined supporting anchor pole
Meanwhile suspension roof support is formed to yield region 2 and elastic region 3, strip coal pillar forms an entirety with top plate 6 and bottom plate 7 after slip casting,
The bearing capacity of yield region is improved, and strip coal pillar has obtained certain lateral restriction, limits the transverse direction of strip coal pillar
Deformation, improve the performance of strip coal pillar.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, it should also belong to the present invention's
Protection domain.
Claims (1)
1. a kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole, the slip casting combined supporting anchor pole are included
There is drill bit（8）, entity anchor bar body（9）And hollow grouting anchor body（11）, the drill bit（8）It is arranged at entity anchor bar body（9）'s
End, the entity anchor bar body（9）Pass through adapter sleeve（10）With hollow grouting anchor body（11）Connection, the hollow grouting anchor
Body（11）On be uniformly arranged multiple injected holes, the hollow grouting anchor body（11）End be provided with stop grouting plug（13）, backing plate
（16）With stifled slurry plug（15）, it is characterised in that it is achieved by the steps of：
1）After the working face mining of strip coal pillar both sides, more slip casting combined supporting anchor poles are installed as needed（4）, wide coal
In the case of post, using more hollow grouting anchor bodies（11）Link together；
2）By slip casting combined supporting anchor pole（4）Spacing as needed, array pitch symmetrically squeeze into coal body both sides, realize to strip coal pillar
Both sides yield region（2）With middle spring area（3）Suspension roof support；
3）In the top and bottom of strip coal pillar respectively by slip casting combined supporting anchor pole（4）Tilt the top plate for squeezing into coal column（6）With
Bottom plate（7）, by strip coal pillar and top plate（6）, bottom plate（7）An entirety is formed, limits the transversely deforming of strip coal pillar；
4）To slip casting combined supporting anchor pole（4）Internal slip casting, first pressed before slip casting clear water 2-5 minutes, rinse crack passage, used
Low-height-low-grade location, ensure slip casting combined supporting anchor pole（4）Interior to be full of cement mortar, slip casting terminates, and realizes yield region（2）
Slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156783.7A CN104847354B (en) | 2015-04-03 | 2015-04-03 | A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156783.7A CN104847354B (en) | 2015-04-03 | 2015-04-03 | A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104847354A CN104847354A (en) | 2015-08-19 |
| CN104847354B true CN104847354B (en) | 2018-02-02 |
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| CN201510156783.7A Active CN104847354B (en) | 2015-04-03 | 2015-04-03 | A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050282B (en) * | 2016-07-08 | 2018-08-03 | 西安科技大学 | A kind of anchor structure and reinforcement means of gob side entry retaining thin coal pillar |
| CN106401604A (en) * | 2016-12-12 | 2017-02-15 | 煤炭科学技术研究院有限公司 | Method for strengthening large coal pillar low in intensity of fracture development |
| CN107060758B (en) * | 2017-04-18 | 2019-01-04 | 辽宁工程技术大学 | A kind of section fender, which stays, sets construction method |
| CN107060811A (en) * | 2017-06-20 | 2017-08-18 | 嘉兴学院 | The bracing means of thin coal pillar between a kind of tunnel |
| CN110486016A (en) * | 2019-08-16 | 2019-11-22 | 山东科技大学 | A method of improving strip coal pillar stability |
| CN114198104A (en) * | 2021-12-15 | 2022-03-18 | 中天合创能源有限责任公司 | Long-distance coal pillar plugging and reinforcing method |
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| CN104847354A (en) | 2015-08-19 |
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