CN106149677B - High-pressure water-enriched goaf grouting reinforcement means - Google Patents
High-pressure water-enriched goaf grouting reinforcement means Download PDFInfo
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- CN106149677B CN106149677B CN201510179339.7A CN201510179339A CN106149677B CN 106149677 B CN106149677 B CN 106149677B CN 201510179339 A CN201510179339 A CN 201510179339A CN 106149677 B CN106149677 B CN 106149677B
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Abstract
High-pressure water-enriched goaf grouting reinforcement means, with numerous deficiencies existing for solving existing goaf grouting reinforcement means, make high-pressure water-enriched goaf grouting strengthening construction feasible, quick and save construction cost.This method forms goaf top plate caving zone using artificial explosion on mined out stabilization zone border, by forming curtain reinforcement body using high pressure slip casting in the caving zone under the effect of both sides water under high pressure, solve the problems, such as that slip casting liquid is difficult to form curtain in water under high pressure goaf.Grouting and reinforcing is inwardly promoted to be gradually reduced the pressure influence of mined out stabilization zone periphery water under high pressure and the not section supplement at water source since mined out stabilization zone surrounding, the pressure of goaf water under high pressure can be reduced by carrying out water-pumping/draining using injected hole, so as to avoid each injected hole from using high pressure slip casting, deposit and consolidate beneficial to injection slurry simultaneously, so as to save engineering time and construction cost.
Description
Technical field
The present invention relates to Geotechnical Engineering, more particularly to high-pressure water-enriched goaf grouting reinforcement means.
Background technology
Coal mine gob is widely present in China, and water in gob area would generally be formed when goaf buried depth is larger, when depositing
Even there is high artesian phenomenon during water water-head in source, so as to form high-pressure water-enriched goaf.When on these goafs
When portion builds engineering project, when it is strict to deformation requirements, it is necessary to taking effective measures ensures the safety of top-out, this
When most effective and the most frequently used method be that grouting and reinforcing is carried out to goaf.But due to the high-pressure water-enriched feature in goaf, pass
The grouting and reinforcing construction technology of system is difficult to carry out：High artesian causes slip casting liquid to enter slip casting liquid in difficult, high artesian
It is difficult to that solidification forms reinforcing body, high artesian is difficult to discharge then consolidation effect is poor, goaf is difficult to form reinforcing and encloses curtain after
Deng.Therefore, a kind of high-pressure water-enriched goaf grouting reinforcement means for adapting to high-pressure water-enriched feature is urgently needed to solve such ask
Topic, and need to have the characteristics that easy for construction, economical, construction is quick, environmentally friendly.
The content of the invention
It is an object of the invention to provide a kind of high-pressure water-enriched goaf grouting reinforcement means, to solve existing goaf grouting
Multinomial deficiency existing for reinforcing construction process, make high-pressure water-enriched goaf grouting strengthening construction feasible, quick and save and be constructed into
This.
The technical solution adopted for the present invention to solve the technical problems is as follows：
The high-pressure water-enriched goaf grouting reinforcement means of the present invention, comprises the following steps：
1) 10~20m divides an endless belt outside mined out stabilization zone, using geological drilling rig drilling 5 in the range of the endless belt
~10 rows, the top of drilling depth to high-pressure water-enriched goaf, every hole insertion high tensile flexible Grouting Pipe, explosive beam, high tensile flexible
Grouting Pipe stretches to the bottom in high-pressure water-enriched goaf；
2) drilled in the range of mined out stabilization zone by design requirement using geological drilling rig to the top in high-pressure water-enriched goaf,
Common Grouting Pipe is stretched into high-pressure water-enriched goaf；
3) ignition charge beam is segmented, goaf top plate caving zone is formed in the range of endless belt；
4) high pressure slip casting is carried out in the range of from high tensile flexible Grouting Pipe to endless belt, forms curtain reinforcement body；
5) slip casting, draining are inwardly carried out since the surrounding of mined out stabilization zone by common Grouting Pipe；
6) repeat step 5) goaf grouting reinforcing body is formed in the range of mined out stabilization zone, complete grouting and reinforcing.
The invention has the advantages that goaf top plate caving zone is formed on mined out stabilization zone border using artificial explosion,
By forming curtain reinforcement body using high pressure slip casting in the caving zone under the effect of both sides water under high pressure, solve slip casting liquid and exist
The problem of being difficult to form curtain in high-pressure water-enriched goaf；Inwardly promote grouting and reinforcing can be by since mined out stabilization zone surrounding
The pressure influence of decrescence small mined out stabilization zone periphery water under high pressure and the not section supplement at water source；Water-pumping/draining is carried out using injected hole
The pressure of goaf water under high pressure can be reduced, so as to avoid each injected hole from using high pressure slip casting, be beneficial to simultaneously
Injection slurry deposits and consolidation, so as to save engineering time and construction cost；The construction technology is simple to operate, speed of application is fast, adopts
Dead zone consolidation effect is good, and construction investment saves, and has wide popularizing application prospect.
Brief description of the drawings
This specification includes following two width accompanying drawing：
Fig. 1 is longitudinal sectional schematic diagram of the high-pressure water-enriched goaf grouting reinforcement means of the present invention；
Fig. 2 is the horizontal sectional schematic diagram of the high-pressure water-enriched goaf grouting reinforcement means of the present invention；
Component name and corresponding mark are shown in figure：High tensile flexible Grouting Pipe 1, explosive beam 2, common Grouting Pipe 3, height
Press rich water goaf 4, goaf top plate caving zone 5, curtain reinforcement body A, goaf grouting reinforcing body B.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Referring to Figures 1 and 2, the high-pressure water-enriched goaf grouting reinforcement means of the present invention, comprises the following steps：
1) 10~20m divides an endless belt outside mined out stabilization zone, using geological drilling rig drilling 5 in the range of the endless belt
~10 rows, the top of drilling depth to high-pressure water-enriched goaf 4 are high-strength soft every hole insertion high tensile flexible Grouting Pipe 1, explosive beam 2
Property Grouting Pipe 1 stretches to the bottom in high-pressure water-enriched goaf 4；
2) drilled in the range of mined out stabilization zone by design requirement using geological drilling rig to the top in high-pressure water-enriched goaf 4
Portion, common Grouting Pipe 3 is stretched into high-pressure water-enriched goaf 4；
3) ignition charge beam 2 is segmented, goaf top plate caving zone 5 is formed in the range of endless belt；
4) high pressure slip casting is carried out in the range of from high tensile flexible Grouting Pipe 1 to endless belt, forms curtain reinforcement body A；
5) slip casting, draining are inwardly carried out since the surrounding of mined out stabilization zone by common Grouting Pipe 3；
6) repeat step 5) goaf grouting reinforcing body B is formed in the range of mined out stabilization zone, complete grouting and reinforcing.
Do not formed between the goaf top plate caving zone 5 and the top surface in high-pressure water-enriched goaf 4 that are formed in the step 3)
Pure hydrous fluids, or pure hydrous fluids are highly no more than 1.0m.
In the step 5), slip casting operation is generally carried out by the common Grouting Pipe 3 of the row of outermost 1~2, the row of adjacent inboard 1~2 is general
Logical Grouting Pipe 3 carries out water-pumping/draining operation.
Such as mined out stabilization zone planar range is too big, can be same from the centre of mined out stabilization zone to surrounding by common Grouting Pipe 3
Step carries out slip casting, draining.
The present invention forms goaf top plate caving zone using artificial explosion on mined out stabilization zone border, by both sides high pressure
Curtain reinforcement body is formed using high pressure slip casting in goaf top plate caving zone under water effect, solves slip casting liquid in high pressure
The problem of being difficult to form curtain in rich water goaf.Inwardly grouting and reinforcing is promoted gradually to subtract since mined out stabilization zone surrounding
The pressure influence of small mined out stabilization zone periphery water under high pressure and the not section supplement at water source.Carrying out water-pumping/draining using injected hole can be with
Reduce the pressure of goaf water under high pressure, so as to avoid each injected hole from using high pressure slip casting, while be beneficial to slip casting
Liquid deposits and consolidation, so as to save engineering time and construction cost；The construction technology is simple to operate, speed of application is fast, goaf
Consolidation effect is good, and construction investment saves, and has wide popularizing application prospect.
The high-pressure water-enriched goaf grouting reinforcement means of the present invention is described in detail below by way of specific embodiment, this
Grouting strengthening method in embodiment is carried out as follows：
1) 10m scopes divide an endless belt outside mined out stabilization zone, using geological drilling rig drilling 5 in the range of the endless belt
Row, spacing of wells 2m, arranged in squares, aperture 130mm, the top of drilling depth to high-pressure water-enriched goaf 4, inserted every hole high
Strong flexible grout pipe 1, explosive beam 2.High tensile flexible Grouting Pipe 1 stretches to the bottom in high-pressure water-enriched goaf 4, and its bearing capacity is
3.5MPa.The section arrangement of explosive beam point 3, per internode away from 2m；
2) drilled in the range of mined out stabilization zone by design requirement using geological drilling rig to the top in high-pressure water-enriched goaf 4
Portion, common Grouting Pipe 3 is stretched into high-pressure water-enriched goaf 4.Spacing of wells 7m, arranged in squares, aperture 130mm.Common slip casting
The bearing capacity of pipe 3 is 2.0MPa；
3) the explosive beam 2 in the range of the 10m of periphery is ignited in segmentation, forms wide about 10m goaf top plate caving zone 5.Ying Jian
Look into goaf top plate caving zone 5 and form whether height meets to require, ignite if being unsatisfactory for and once required to satisfaction again, and with this
There is provided for other scope embodiments and ignite reference frame；
4) repeat step 3) successively ignite the other scopes in periphery explosive beam 2, formed outside mined out stabilization zone and continuously adopted
Dead zone top plate caving zone 5；
5) high pressure (3.5MPa) slip casting is carried out in the range of from high tensile flexible Grouting Pipe 1 to endless belt, curtain is formed and adds
Solid A；
6) slip casting, draining, the row of outermost 2 are inwardly carried out since the surrounding of mined out stabilization zone by common Grouting Pipe 3
The logical slip casting of Grouting Pipe 3, the logical water-pumping/draining of Grouting Pipe 3 of the row of inner side 2 note；
7th, repeat step 6 forms goaf grouting reinforcing body B in the range of mined out stabilization zone, completes grouting and reinforcing.
The present invention is described in detail above, the principle and embodiment of the present invention entered using specific case in text
Elaboration is gone, the explanation of following examples is only intended to help the method and its core concept for understanding the present invention.It should be pointed out that pair
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
Claims (4)
1. high-pressure water-enriched goaf grouting reinforcement means, comprises the following steps：
1) 10~20m divides an endless belt outside mined out stabilization zone, using geological drilling rig drilling 5~10 in the range of the endless belt
Row, the top of drilling depth to high-pressure water-enriched goaf (4) are high-strength every hole insertion high tensile flexible Grouting Pipe (1), explosive beam (2)
Flexible grout pipe (1) stretches to the bottom of high-pressure water-enriched goaf (4)；
2) drilled in the range of mined out stabilization zone by design requirement using geological drilling rig to the top of high-pressure water-enriched goaf (4),
Common Grouting Pipe (3) is stretched into high-pressure water-enriched goaf (4)；
3) ignition charge beam (2) is segmented, goaf top plate caving zone (5) is formed in the range of endless belt；
4) high pressure slip casting is carried out in the range of from high tensile flexible Grouting Pipe (1) to endless belt, forms curtain reinforcement body (A)；
5) slip casting, draining are inwardly carried out since the surrounding of mined out stabilization zone by common Grouting Pipe (3)；
6) repeat step 5) goaf grouting reinforcing body (B) is formed in the range of mined out stabilization zone, complete grouting and reinforcing.
2. high-pressure water-enriched goaf grouting reinforcement means as claimed in claim 1, it is characterized in that：Formed in the step 3)
Pure hydrous fluids, or pure hydrous fluids height are not formed between goaf top plate caving zone (5) and the top surface of high-pressure water-enriched goaf (4)
Degree is no more than 1.0m.
3. high-pressure water-enriched goaf grouting reinforcement means as claimed in claim 1, it is characterized in that：In the step 5), outermost 1
The common Grouting Pipe of~2 rows (3) carries out slip casting operation, and the common Grouting Pipe of the row of adjacent inboard 1~2 (3) carries out water-pumping/draining operation.
4. high-pressure water-enriched goaf grouting reinforcement means as claimed in claim 1, it is characterized in that：In the step 5), pass through
Common Grouting Pipe (3) synchronously carries out slip casting, draining from the centre of mined out stabilization zone to surrounding.
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| CN201510179339.7A CN106149677B (en) | 2015-04-16 | 2015-04-16 | High-pressure water-enriched goaf grouting reinforcement means |
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| CN201510179339.7A CN106149677B (en) | 2015-04-16 | 2015-04-16 | High-pressure water-enriched goaf grouting reinforcement means |
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| CN106149677B true CN106149677B (en) | 2018-03-23 |
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| CN106761543B (en) * | 2016-12-02 | 2019-07-19 | 淮北矿业股份有限公司 | A method of drilling misses section by goaf |
| CN109488340A (en) * | 2018-12-30 | 2019-03-19 | 平煤神马建工集团有限公司 | Advanced pouch pre-pouring grout passes rapidly through the construction method in high prominent down-hole goaf |
| CN109779657B (en) * | 2019-01-08 | 2021-07-27 | 中铁二院工程集团有限责任公司 | High-pressure water-rich goaf group hole driving, draining, grouting and reinforcing construction method |
| CN110107348A (en) * | 2019-04-02 | 2019-08-09 | 中勘资源勘探科技股份有限公司 | A kind of underground break-though roadways ground blocking technology |
| CN110644310A (en) * | 2019-09-24 | 2020-01-03 | 山东大学 | Controllable mold bag grouting method for reinforcing roadbed of underlying goaf |
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| JPS55105021A (en) * | 1979-02-07 | 1980-08-12 | Shigeo Takamura | High pressure chemichal liquid grouting method utilizing high frequency vibration pressure |
| CN103573276B (en) * | 2013-11-18 | 2015-09-09 | 北京建工土木工程有限公司 | A kind of mobilism grouting method |
| CN204186400U (en) * | 2014-10-22 | 2015-03-04 | 中铁二院工程集团有限责任公司 | High-pressure water-enriched goaf ruggedized construction |
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