CN105041344B - High-pressure gas seam-expanding, grouting and water-plugging method for precutting trough of microfissure surrounding rock - Google Patents
High-pressure gas seam-expanding, grouting and water-plugging method for precutting trough of microfissure surrounding rock Download PDFInfo
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- CN105041344B CN105041344B CN201510368674.1A CN201510368674A CN105041344B CN 105041344 B CN105041344 B CN 105041344B CN 201510368674 A CN201510368674 A CN 201510368674A CN 105041344 B CN105041344 B CN 105041344B
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Abstract
The invention relates to a high-pressure gas seam-expanding, grouting and water-plugging method for a precutting trough of microfissure surrounding rock. Annular cutting groove pretreatment is performed on the bottom of a grouting hole, the surrounding rock on the bottom of the grouting hole cracks in a directional manner along an annular cutting groove by a high-pressure gas seam-expanding mode, a through fracture plane is generated between the surrounding rock and an adjacent drilling hole, cement paste is injected in the through fracture plane so as to block the through fracture plane, a complete and effective water-plugging curtain is formed, the purpose of blocking a water seepage channel of the microfissure surrounding rock is achieved, new fissures in the surrounding rock can be avoided, water-plugging failure caused by secondary damage on the surrounding rock is avoided, a microfissure surrounding rock grouting and water-plugging effect is improved greatly, an application range is wide, field operation is simple, a blocking effect on permeated water of the microfissure surrounding rock is excellent, and the field direct application value is high.
Description
Technical field
The present invention relates to a kind of new method of down-hole microfissure wall rock grouting blocking water, and in particular to a kind of microfissure country rock is pre-
Grooving gases at high pressure expand seam grouting water blocking method.
Background technology
When the well lanes engineering such as mine shaft, tunnel are through aperture less microfissure sandstone aquifer, country rock water percolating capacity is big,
The closure of microfissure penetrating passage is difficult, often brings serious impact to excavation and maintenance.Colliery roadway surrounding rock supporting material
Material is mostly metal, and high-strength antiperspirant oozes the corrosion rate that crevice water increased support material, greatly reduces the intensity of prop,
It is unfavorable for the stability contorting of country rock, and accumulates in roadway floor, floor strata long-term leaching in water after wall-rock crack water oozes out more
In bubble, loss of strength is serious, easily produces serious pucking destruction.
Country rock microfissure seepage channel blocking technology lacks the safe and efficient production that annoying colliery all the time.At present most
The mode of conventional closure country rock microfissure seepage channel is slip casting closure.There is scholar's proposition to carry out country rock using chemical grout micro-
The slip casting closure of crack penetrating passage, chemical grout granule are less, can enter microfissure penetrating passage, realize closure, but
Often toxicity is very big for chemical grout, can cause serious pollution to groundwater environment, and chemical grout is costly.With chemistry
Serosity is compared, and ordinary cement slurry is nontoxic, and groundwater resources are not polluted, and slip casting calculus rate is high, intensity is big, expense is low, blocks up
Water effect is obvious, but too big for microfissure penetrating passage, ordinary cement slurry granule, does not have the property noted, it is difficult to block seepage flow
Passage.
Chinese patent CN201210380499.4 discloses a kind of Deephole pre-splitting blasting grouting method, by beating on rock mass
Drilling of the depth more than 8m, is put into explosive cartridge in the borehole, and the explosive in detonation drilling carries out the presplit blasting of rock mass, makes drilling
The rock mass of periphery produces substantial amounts of crack, then injects the mixed serum such as cement and waterglass in drilling, closes rock cranny
Play a part of water blockoff.But for country rock microfissure penetrating passage, it is not good using the method water plugging effect.Analysis is former
Cause, is that to be produced due to deep hole explosive blasting is the spherical plane of fracture, and explosion makes plane of fracture surrounding rock body produce substantial amounts of crack,
And these cracks have obvious randomness, between adjacent blast hole, wall-rock crack insertion degree is difficult to accurately control, and strong
Under big blast impulse disturbance, between adjacent blast hole, rock mass can also produce a large amount of new microfissures, thus cannot be in microfissure
Complete grouting for water blocking curtain is formed outside country rock, and water plugging effect is not good.
The content of the invention
In order to solve above-mentioned deficiency, a kind of microfissure country rock precutting trough gases at high pressure of present invention design expand seam grouting for water blocking side
Method.
The present invention is achieved by the following technical solutions：A kind of microfissure country rock precutting trough gases at high pressure expand seam slip casting and block up
Water method, step are as follows：
Step 1）According to quincuncial bore arrangement mode, region is oozed in country rock microfissure antiperspirant and beat injected hole, it is ensured that each
The depth of injected hole is identical, and error is less than 1cm, and carries out ring grooving pretreatment in each injected hole bottom same position, makes
Injected hole bottom country rock produces ring grooving, and slip casting sleeve pipe is placed in injected hole, slip casting cannula tip away from injected hole bottom away from
From for 10cm, and slip casting sleeve outer wall is secured entirely on hole wall using high-strength quick-solidifying concrete；
Step 2）High pressure resistant metal tube is placed in injected hole along hollow slip casting inside pipe casing, at the top of high pressure resistant metal tube
Distance away from injected hole bottom is 5cm, starts High-Pressure Compressor, and the gases at high pressure that High-Pressure Compressor is produced are by resistance to
High pressure gas pipeline and high pressure resistant metal tube are transported in injected hole, make the gas pressure in injected hole reach the expansion seam pressure of setting
Value, and maintain this pressure value 15 ~ 20 minutes, under the thrust of gases at high pressure, circumferentially grooving slip casting bottom hole portion country rock occurs
Cleavage fracture, produces the artificial fissure-plane approximately perpendicular to injected hole, under the continuous action of gases at high pressure, injected hole bottom
Fissure-plane is constantly expanded to surrounding, the fissure-plane insertion for finally producing with adjacent injected hole；
Step 3）Prefabricated cement mortar is injected to the fissure-plane of insertion by each injected hole, is being enclosed after cement slurry sets
One layer of complete grouting for water blocking curtain is formed outside rock microfissure, so as to realize that country rock microfissure water gushing channelway is effectively sealed
It is stifled.
Determine that gas expands the method for seam pressure value and is：Depth is beaten in two injected hole centre positions and is deeper than injected hole 0.5m or so
Peephole, using intelligent drilling television imager real-time monitored hole bottom end crack spread scenarios, open pressure-air compression
The valve of machine, gases at high pressure are input in injected hole, incrementally increase gas pressure value in injected hole, when can be from peephole
When observing the crack of extension, pressure value now is the gases at high pressure of the roadway surrounding rock and expands seam pressure value.
A kind of microfissure country rock precutting trough gases at high pressure expand seam grouting for water blocking device, including slip casting sleeve pipe, high pressure resistant metal
Pipe, high voltage tolerant input trachea and gases at high pressure input equipment；The slip casting sleeve pipe is hollow structure, in injected hole, in which
Fixed dam is set on the body at end, and outer end arranges silk mouth；The high pressure resistant metal tube axially across slip casting sleeve pipe, its inner end position
In injected hole, outer end is connected with gases at high pressure input equipment by high voltage tolerant input trachea, and is fixed with energy on high-pressure metal pipe
Enough sealing nuts being threadedly coupled with the silk mouth of slip casting sleeve pipe；The high voltage tolerant input trachea is provided with pressure gauge and valve.
In the sealing nut, seal washer is set.
The present invention is, by carrying out ring grooving pretreatment to injected hole bottom, and to make by the way of gases at high pressure expand seam
Circumferentially the cleavage fracture for orienting in grooving to injected hole bottom country rock there is, produce the artificial crack of insertion between adjacent drilling
Face, is then blocked to the fissure-plane injection cement mortar of insertion, forms complete effectively water block curtain, reach microfissure country rock
The purpose of penetrating passage closure.
The positive effect of the present invention：1）Artificial expansion is carried out using gases at high pressure to stitch to microfissure country rock, country rock is breached micro-
Fracture opening is less, and the cement grout property noted is poor, the difficult problem of microfissure penetrating passage closure, and does not have during gas expands seam
There is the high-strength detonation wave percussion of explosive blasting, country rock will not be made to produce new microfissure, it is to avoid to the secondary broken of country rock
Water blockoff failure caused by bad；2）The present invention carries out ring grooving process to injected hole bottom country rock, is then expanded using gases at high pressure
The mode of seam makes country rock that the cleavage fracture of orientation to occur along grooving, by strict control slip casting hole depth and grooving position, can be accurate
There is insertion in the true fissure-plane that two adjacent injected holes are produced that makes, form complete insertion fissure-plane, greatly improve microfissure and enclose
Rock grouting for water blocking effect；3）Applied range of the present invention, execute-in-place implement simple, and microfissure country rock infiltration plugging effect is dashed forward
Go out, with higher live direct application value.
Description of the drawings
Fig. 1 is slip casting sleeve pipe installation implementation schematic diagram in the present invention.
Fig. 2 is country rock gases at high pressure expansion seam implementation schematic diagram in the present invention.
Fig. 3 is to expand seam slip casting plugging effect schematic diagram in the present invention to country rock.
In figure, 1. injected hole, 2. high-strength quick-solidifying concrete, 3. slip casting sleeve pipe, 4. fixed dam, 5. ring grooving, 6. close
Seal washer, 7. sealing nut, 8. high pressure resistant metal tube, 9. pressure gauge, 10. valve, 11. high voltage tolerant input tracheas, 12. fissure-planes.
Specific embodiment
As shown in Fig. 1 ~ Fig. 3, technical solution of the present invention is broadly divided into three steps and is implemented, and is that injected hole grooving is processed first
And the installation of slip casting sleeve pipe, artificial expansion being carried out to country rock using gases at high pressure secondly and being stitched, slip casting envelope is carried out to country rock crack finally
Stifled, detailed step is as follows：
The first step, according to the quincunx injected hole arrangement for designing, oozes region in country rock microfissure antiperspirant and beats injected hole
1, it is ensured that the deep of each injected hole is consistent, error is less than 1cm, then carries out grooving to injected hole bottom country rock same position pre-
Process, make injected hole bottom country rock produce ring grooving 5, slip casting sleeve pipe 3 is placed in injected hole 1, using high-strength quick-solidifying coagulation
Soil 2 is fixed on the region beyond fixed dam 4 on slip casting sleeve pipe 3 on hole wall, completes the installation of slip casting sleeve pipe 3；
Second step, high pressure resistant metal tube 8 is internally located in injected hole 1 along hollow slip casting sleeve pipe 3, high pressure resistant metal tube
Distance at the top of 8 away from 1 bottom of injected hole is 5cm, in sealing nut 7 puts a seal washer 6, then by sealing nut 7 and note
The silk mouth of slurry sleeve pipe 3 is threaded together, and opens valve 10, and the gases at high pressure that external high pressure air compressor is produced are by high pressure resistant
Appendix 11 and high pressure resistant metal tube 8 are input in injected hole 1, make the gas pressure in injected hole reach the expansion seam pressure of setting
Value, and maintains this pressure value 15 ~ 20 minutes, slip casting bottom hole portion country rock circumferentially grooving 5 under the thrust of gases at high pressure
Raw cleavage fracture, produces the artificial fissure-plane 12 approximately perpendicular to injected hole 1, under the continuous action of gases at high pressure, injected hole
The fissure-plane 12 of bottom is constantly expanded to surrounding, 12 insertion of artificial fissure-plane for finally producing with adjacent injected hole；
3rd step, injects prefabricated cement mortar to injected hole, cement mortar enter after solidifying in the fissure-plane 12 of insertion
One layer of complete grouting layer is formed outside country rock microfissure, as shown in figure 3, complete grouting for water blocking curtain is formed, it is right so as to realize
Country rock microfissure water gushing channelway is effectively blocked.
Below by taking certain ore deposit as an example, with reference to accompanying drawing, the invention will be further described.
Certain big lane of ore deposit return air is located at northern wing exploiting field, buried depth about 700m, and cross-section shape of roadway is stalk Semicircular arched, and wall is high
1880mm, sagitta 2523mm, clear span 5046mm.Tunnel roof and floor country rock is more based on sandstone, siltstone.During tunnelling
Main water filling source is top board sandstone fissure water.Back sandstone microfissure is developed, and watery is strong, and microfissure is aqueous more oozing
The form of water enters tunnel, and dripping occurs in Local topography.Long-term infiltration causes that tunnel portion of side rock mass is loose, reduction, and tunnel becomes
Shape is serious.
Therefore, gases at high pressure are carried out using technical scheme to roadway surrounding rock and expands seam grouting for water blocking.
First, help to beat the injected hole 1 of diameter 35mm, depth 3m ± 1cm in back and two, injected hole 1 adopts Flos Mume
Shape arranges that the spacing of adjacent injected hole 1 is 2.6m.Ring precutting trough process is carried out in each 1 bottom country rock of injected hole, slip casting is made
Bottom hole portion country rock produces ring grooving 5, as shown in figure 1, and then completing the installation of slip casting sleeve pipe 3.
Secondly, as shown in Figure 2, the installation of high pressure resistant metal tube 8 and connecing for high pressure resistant metal tube 8 and slip casting sleeve pipe 3 are completed
Even, the distance at the top of high pressure resistant metal tube 8 away from 1 bottom of injected hole is 5cm.
First determine before expanding seam slip casting that the roadway surrounding rock gases at high pressure expand seam pressure value.Beat deep in two injected holes, 1 centre position
The peephole for 3.5m is spent, using crack spread scenarios at 3m right positions in intelligent drilling television imager real-time monitored hole.
Open valve 10, the gases at high pressure that extraneous air compressor is produced are input in injected hole 1, gas in injected hole 1 is incrementally increased
Body pressure value, observes the crack of extension when gas pressure value is 36MPa in peephole.That is the roadway surrounding rock gases at high pressure
It is 36Mpa to expand seam pressure value, maintains this pressure value 15 ~ 20 minutes, the slip casting bottom hole portion country rock under the thrust of gases at high pressure
Circumferentially there is cleavage fracture in grooving 5, produce the artificial fissure-plane 12 approximately perpendicular to injected hole 1, continuing in gases at high pressure
Under effect, the fissure-plane 12 of injected hole bottom is constantly expanded to surrounding, the artificial fissure-plane 12 for finally producing with adjacent injected hole
Insertion；
Finally, cement grout is injected in injected hole 1, complete microfissure wall rock grouting blocking water.
After using technical solution of the present invention, by the long-term it has been observed that country rock infiltration, drop of the situation that seeps water to roadway surrounding rock
Regimen condition all disappears, and realization is effectively blocked to country rock microfissure water gushing channelway.
Claims (4)
1. a kind of microfissure country rock precutting trough gases at high pressure expand seam grouting water blocking method, it is characterised in that step is as follows：
Step 1）According to quincuncial bore arrangement mode, region is oozed in country rock microfissure antiperspirant and beat injected hole, it is ensured that each slip casting
The depth in hole is identical, and error is less than 1cm, and carries out ring grooving pretreatment in each injected hole bottom same position, makes slip casting
Bottom hole portion country rock produces ring grooving, and slip casting sleeve pipe is placed in injected hole, and distance of the slip casting cannula tip away from injected hole bottom is
10cm, and slip casting sleeve outer wall is secured entirely on hole wall using high-strength quick-solidifying concrete；
Step 2）High pressure resistant metal tube is placed in injected hole along hollow slip casting inside pipe casing, away from note at the top of high pressure resistant metal tube
The distance in slurry bottom hole portion is 5cm, starts High-Pressure Compressor, and the gases at high pressure that High-Pressure Compressor is produced are by high pressure resistant
Appendix and high pressure resistant metal tube are transported in injected hole, make the gas pressure in injected hole reach the expansion seam pressure value of setting,
And maintain this pressure value 15 ~ 20 minutes, under the thrust of gases at high pressure, slip casting bottom hole portion country rock circumferentially split by grooving
Split destruction, produce the artificial fissure-plane approximately perpendicular to injected hole, under the continuous action of gases at high pressure, injected hole bottom is split
Gap face is constantly expanded to surrounding, the artificial fissure-plane insertion for finally producing with adjacent injected hole；
Step 3）Prefabricated cement mortar is injected to the fissure-plane of insertion by each injected hole, it is micro- in country rock after cement slurry sets
One layer of complete grouting for water blocking curtain is formed outside crack, so as to realize that country rock microfissure water gushing channelway is effectively blocked.
2. a kind of microfissure country rock precutting trough gases at high pressure according to claim 1 expand seam grouting water blocking method, its feature
It is to determine that gas expands the method for seam pressure value and is：Depth is beaten in two injected hole centre positions and is deeper than injected hole 0.5m's or so
Peephole, using intelligent drilling television imager real-time monitored hole bottom end crack spread scenarios, opens High-Pressure Compressor
Valve, gases at high pressure are input in injected hole, gas pressure value in injected hole is incrementally increased, when can see from peephole
When measuring the crack of extension, pressure value now is the gases at high pressure of the roadway surrounding rock and expands seam pressure value.
3. a kind of microfissure country rock precutting trough gases at high pressure expand seam grouting for water blocking device, it is characterised in that including slip casting sleeve pipe, resistance to
High-pressure metal pipe, high voltage tolerant input trachea and gases at high pressure input equipment；The slip casting sleeve pipe is hollow structure, installed in injected hole
In, fixed dam is set on the body of its inner end, outer end arranges silk mouth；The high pressure resistant metal tube axially across slip casting sleeve pipe,
Its inner end is located in injected hole, and outer end is connected with gases at high pressure input equipment by high voltage tolerant input trachea, and high pressure resistant metal tube
On be fixed with the sealing nut that can be threadedly coupled with the silk mouth of slip casting sleeve pipe；The high voltage tolerant input trachea be provided with pressure gauge and
Valve.
4. a kind of microfissure country rock precutting trough gases at high pressure according to claim 3 expand seam grouting for water blocking device, its feature
It is that seal washer is set in the sealing nut.
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| CN113653460B (en) * | 2020-11-16 | 2023-04-07 | 中国石油天然气集团有限公司 | Solid pipe plugging device |
| CN112855072B (en) * | 2021-02-04 | 2022-10-28 | 河南理工大学 | Device and method for mineralizing and multistage blocking surrounding rock fracture water by using slurry and microorganisms |
| CN113358822B (en) * | 2021-06-01 | 2023-03-10 | 盾构及掘进技术国家重点实验室 | Method for monitoring micro-crack development characteristics of tunnel surrounding rock surface based on conductive spraying |
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| CN114458234A (en) * | 2022-03-29 | 2022-05-10 | 嵩县金牛有限责任公司 | Water plugging construction method for underground aquifer rock mass tunneling |
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| JPH04102037A (en) * | 1990-08-21 | 1992-04-03 | Nippon Petrochem Co Ltd | Method and apparatus for inspecting leakage of sheet material |
| JPH06157839A (en) * | 1992-11-25 | 1994-06-07 | Tonen Chem Corp | Water-absorbent resin composition |
| CN1752710A (en) * | 2004-09-24 | 2006-03-29 | 杜志刚 | Directional fracturing cutting blasting controlling method |
| CN101813002B (en) * | 2010-04-26 | 2011-11-16 | 张海成 | Coal seam pre-splitting method based on gas extraction |
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