CN105756700B - Large section tunnel wears the construction method and hole sealing structure of coal measure strata section - Google Patents
Large section tunnel wears the construction method and hole sealing structure of coal measure strata section Download PDFInfo
- Publication number
- CN105756700B CN105756700B CN201610139185.3A CN201610139185A CN105756700B CN 105756700 B CN105756700 B CN 105756700B CN 201610139185 A CN201610139185 A CN 201610139185A CN 105756700 B CN105756700 B CN 105756700B
- Authority
- CN
- China
- Prior art keywords
- coal
- section
- tunnel
- pressure break
- coal seam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 156
- 238000007789 sealing Methods 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 239000012141 concentrate Substances 0.000 claims abstract description 10
- 239000011440 grout Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 229920002635 polyurethane Polymers 0.000 abstract description 5
- 239000004814 polyurethane Substances 0.000 abstract description 5
- 241000195955 Equisetum hyemale Species 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses construction methods and hole sealing structure that a kind of large section tunnel wears coal measure strata section, this method includes the steps that hydraulic fracturing and gas drainage, hydraulic fracturing successively carries out concentration pressure break to multiple pressure break holes using the Frac unit for being laid in the same area, determine that coal measure strata section concentrates the concentration number of pressure break and at least two coal seams to be traversed of primary concentration pressure break and Coal Seam Prone To Outburst and the bore position once concentrated and depth before pressure break；Gas drainage includes the concentration extraction in more than two coal seams, and to i.e. by the independent extraction in digging coal seam.Hole sealing structure is formed by hole sealing device, and the pressure break pipe inner end of hole sealing device is formed with floral tube section, and floral tube section is divided into section and floral tube outer segment in floral tube, is wound at least one layer of gauze on the outer wall of floral tube outer segment；Sealing section is made of grout cures section and polyurethane seal section.The invention has the advantages that driving method can ensure that tunnel piercing quickly, safety coal measure strata section；The sealing of hole effect of hole sealing structure is good, bearing capacity is strong.
Description
Technical field
The present invention relates to a kind of super large end face tunnel piercing technology, especially a kind of large section tunnel wears coal measure strata section
Construction method and for the hydraulic fracturing drilling and sealing structure in this method.
Background technique
With the development of China's communication, more and more, the high methane tunnel of the case where tunnel is built on stratum containing gas is passed through
Road quantity is also being continuously increased.Although the gas tunnel of domestic construction there are Gas Outburst, has mostly based on high methane at present
Gas Outburst phenomenon it is less, the general method using conventional coal mine roadway driving, construction rate is low, and the duration is longer.According to endless
Full statistics, the country, which includes coal and the prominent dangerous tunnel of gas, hair ear vcehicular tunnel, Wumeng Shan Mountain railway tunnel etc., but not completely
A set of process about coal and the prominent constructing tunnel of gas is formed, external gas tunnel construction referential experience is less.For
This, need it is a kind of safety, quickly through the construction technology of coal measure strata section.
Summary of the invention
The first object of the present invention is in view of the deficiencies of the prior art, to provide a kind of large section tunnel and wear coal measure strata section
Construction method reduce fracturing unit and turn in such a way that the same area is once concentrated multiple pressure break to multiple coal seams
Number is moved, pressure break preparation amount is substantially reduced, so that tunnel boring efficiency is improved, it is good to be laid quickly through coal measure strata section
Good basis；And the judgement by carrying out gas drainage at the distance set away from coal seam at least two to be dug and tunneling safely, really
Protect tunnel piercing safety.The second object of the present invention is to provide the concentration hydraulic fracturing that a kind of large section tunnel passes through multiple seam
Drilling and sealing structure forms the fracturing borehole of the hole sealing structure, and sealing of hole speed is fast, sealing of hole is secured, sealing effect is good, can be square
Just, reliably realize and concentrate hydraulic fracturing, be conducive to improve tunnel boring efficiency, to provide reliable guarantor quickly through coal measure strata section
Barrier.
To realize the first purpose, the present invention adopts the following technical scheme:
A kind of large section tunnel wears the construction method of coal measure strata section, includes the steps that hydraulic fracturing and gas drainage,
The hydraulic fracturing successively concentrates multiple pressure break holes using the Frac unit for being laid in tunnel the same area
Pressure break surveys data according to the ground of coal measure strata section to be traversed before pressure break, determines that coal measure strata section concentrates the concentration number of pressure break
Primary at least two coal seams to be traversed for concentrating pressure break, and first in the first coal seam to be traversed for once concentrating hydraulic fracturing sets
At set a distance, smart spy is carried out to coal seam to be traversed, to obtain the accurate parameter of respectively coal seam thickness to be taken off and adjacent coal bed spacing, with
And each Gas Outburst parameter to the Methane Diffusion speed of exposed coal layer and pressure；Outburst coal is determined according to Gas Outburst parameter
Layer and the primary fracturing borehole position for concentrating hydraulic fracturing and depth, and fracturing borehole is carried out to apply brill and sealing of hole；
The gas drainage includes the concentration extraction after hydraulic fracturing to more than two coal seams, and in tunnel piercing to appointing
To i.e. by the independent extraction in the coal seam to be dug of digging at second set distance in one coal seam.
The present invention by adopting the above technical scheme, by once being concentrated multiple pressure break to multiple coal seams in the same area
Mode, reduce fracturing unit transfer number, substantially reduce pressure break preparation amount, be fast to improve tunnel boring efficiency
Speed lays good basis by coal measure strata section；And by carrying out gas pumping at the distance set away from coal seam at least two to be dug
The judgement adopted and tunneled safely, it is ensured that tunnel piercing safety.
Preferably, the independent extraction further include tunnel piercing to away from i.e. by the third in the coal seam to be dug of digging set away from
It is carried out from place.Further increase the safety of tunnel piercing.
It is further preferred that the third set distance is 2.5~3.5m.Further increase the reliable of driving safety
Property.
It preferably, further include Gas Outburst parameter detecting after the gas drainage, to judge whether tunnel can carry out safety
Driving；It is then to continue to tunnel；It is no, then continue extraction, and judge whether tunnel can carry out again by Gas Outburst parameter detecting
Safety driving.Use for reference the Gas Outburst judgment criteria and method of Gas-bearing Coal Seams exploitation in coal mine sweat, it is ensured that the safety of driving
Property.
It preferably, further include the Gas Outburst parameter prediction of constructing in coal seam when tunnel piercing is opened to coal seam
The prediction drilling of concordant coal seam predicts that drilling carries out the prominent parameter prediction of coal-bed gas by concordant coal seam, and whether judges tunnel
Safe coal-openning can be carried out, is, then continues exposed coal to passing through this coal seam；It is no, then gas drainage is carried out, and carry out coal-bed gas again
It protrudes parameter prediction and whether can carry out safe coal-openning judgement.To carry out safety driving judgement again after opening coal seam, it is ensured that
Safety of the tunnel in the tunneling process of coal seam.
Preferably, first set distance is 10~12m；It is 5~6m at second set distance.To obtain coal seam
The accurate data of thickness and Gas Outburst, tunnel piercing does not provide safeguard safely.
Preferably, the sealing section of at least one in multiple pressure break holes has the portion in the coal seam passed through
Point.To carry out pressure break to target coal seam in pressure break, and ensures once to concentrate and gradation pressure at least is carried out to two target coal seams,
It reduces and concentrates number and pressure break preparation amount, improve tunnel boring efficiency.
It preferably, further include the coal body to coal measure strata section in the tunneling process of the Tunnel Passing coal measure strata section
It is segmented with rock mass and carries out advance support processing, which includes entering steel pipe in the coal and rock embedded in hole of coal measure strata section,
It is consolidated using cement grout, multiple steel pipes are in the setting regions outside the outline excavation control line of tunnel middle and upper part and lateral wall
Form canopy formula advance support structure.To prevent in tunneling process rock mass or coal and rock to collapse because soft, driving is further ensured that
Safety.
To realize that the second purpose, the present invention adopt the following technical scheme that.
A kind of large section tunnel passes through the concentration hydraulic fracturing drilling and sealing structure of multiple seam, including presses with primary concentrate
Multiple fracturing boreholes that number is equal to each other are split, a hole sealing device are correspondingly arranged in each fracturing borehole, and pass through corresponding envelope
Aperture apparatus forms hole sealing structure, and hole sealing device protrudes into corresponding coal seam by roof direction, and hole sealing device includes pressure break pipe, grouting
Pipe, pressure break pipe inner end are formed with the floral tube section of setting length, and floral tube section is separated by the tie part that horsetail form drag starches structure
Section and floral tube outer segment in floral tube, section is discharged for hydraulic fracturing in floral tube, is wound at least one layer of yarn on the outer wall of floral tube outer segment
Cloth；Horsetail form drag slurry structure is formed by the cotton yarn or fabric item being banded on pressure break pipe, and is located in roof,
Sealing section is made of grout cures section and polyurethane seal section.
Using preceding solution hole sealing structure, it can be achieved that multiple coal seams primary concentration gradation pressure break, formed sealing of hole
The hole sealing device structure of structure is simple, and sealing of hole is convenient, and sealing section sealing effect is good, and bearing capacity is strong.Wherein, section is used in floral tube
Frac water water outlet, floral tube section outer segment are used for cement slurry draining；Horsetail and gauze have permeable and resistance sand effect, are conducive to prevent water
In the coal seam and pressure break pipe of mud flow drilling inner end, and is conducive to the cement slurry near horsetail and floral tube outer segment and accelerates admittedly
Change.When hole sealing device merging drilling, preferably pressure break pipe and grout pipe are fixed together by fixing pieces such as pipe clamps, to improve behaviour
The convenience of work.Meanwhile using the soft characteristic of gauze, high pressure water mud can fill to form hole to section floral tube bore portion in floral tube
Plug, can be improved the fastness combined between pressure break pipe and cement slurry seal section.
Preferably, the horsetail form drag starches at least 1 meter of structure length, is welded with horsetail shape at the tie part of pressure break pipe
Plasma resistance structure is tied up with multiple anti-skid studs or anti-slop serrations；Outer at least 1 meter of the segment length of the floral tube；The polyurethane sealing of hole segment length
At least 1.5 meters.To ensure that sealing section has the bearing capacity not less than 35MPa.
Compared with the prior art, the invention has the advantages that driving method can ensure that tunnel piercing quickly, safety
Coal measure strata section；The sealing of hole effect of hole sealing structure is good, bearing capacity is strong.
Detailed description of the invention
Fig. 1 is carried out in tunnel piercing using the method for the present invention, true by exploration data in the coal measure strata that tunnel is passed through
Fixed multiple digital well logging structural schematic diagrams.
Fig. 2 is the distribution schematic diagram that multiple pressure break holes are once concentrated in the method for the present invention.
Fig. 3 is advance support structural schematic diagram in the method for the present invention.
Fig. 4 is the structural schematic diagram of hole sealing structure of the present invention.
Specific embodiment
The present invention will be further described below with reference to the drawings, but does not therefore limit the present invention to the implementation
Among range.
Embodiment 1, a kind of large section tunnel wear the construction method of coal measure strata section, including hydraulic fracturing and gas drainage
The step of, this method is used to pass through the tunnel piercing in totally 9 coal seams K1~K9 in certain design, by K1~K9 of geological exploration result
Digital well logging and spacing, as shown in Figure 1, wherein thickness and spacing units are m.
Data is surveyed according to the ground of aforementioned coal measure strata section to be traversed, determines that 9 coal seams of coal measure strata section use and collects twice
The mode of middle pressure break carries out gradation pressure break to multiple coal seams, wherein concentrates pressure break to the coal seam K9~K4, second of concentration for the first time
Pressure break carries out the coal seam K3~K1.
When tunnel excavation working face is to away from K9 and K3 roof minimum perpendicular distance 10m, pass through drill hole sampling respectively
Analysis obtain the coal seam K9~K1 be averaged digital well logging be respectively 0.94m, 0.82m, 0.71m, 0m, 2.60m, 1.65m, 0.1m,
1.21m,0.35m；It is that the coal seam 2.41m, K7 and K5 spacing is that K9 and the coal seam K8 spacing, which are 1.87m, K8 and K7 coal seam spacing,
It is 7.49m, K3 and K2 coal seam spacing is 25.72m that the coal seam 13.3m, K5 and K4 spacing, which is 0.7m, K4 and K3 coal seam spacing, K2 with
The coal seam K1 spacing is 6.95m；Wherein, K6 coal seam thickness is 0, i.e., non-coal seam, K3 coal seam thickness is that 0.1 meter of thinning is that seam can neglect
Slightly disregard, and by being sampled to all coal seams passed through, original watt of coal seam is measured using DGC rapid measurement device for gas content
This content, inverse gas pressure；Using WFC-2 type gas diffusion initial speed automatic analyzer, smash cylinder, hopper, day equality to pieces
Instrument is measured Δ P, f value；And the Failure type in coal seam is analyzed in location of the coring procedure.Whether to determine place work area
For Gas Outburst work area.With specific reference to the related request of " super-long railway tunnel technical specification ", as long as gas tunnel, which has at one, to be had
Outburst danger, the place work area be Gas Outburst work area.It is determined as that Gas Outburst must meet following 4 indexs simultaneously:
(1) gas pressure P >=0.74MPa；(2) P >=10 gas diffusion initial speed △；(3) solid coefficient f≤0.5 of coal；(4) coal
Failure type be III class or more.In deterministic process, since the gas pressure measurement period is longer, according to " prevention and treatment coal and gas
Prominent regulation " requirement, take the data such as actual measurement gas bearing capacity and industrialness analysis result to carry out inverse gas pressure.Obtain K9,
K5, K4 and K2 be it is projecting coal bed, remaining is non-protruding coal seam.Then, determine for the first time concentrate pressure break respectively to K9, K8, K7,
K5, K4 coal bed fracturing, and creeping into three pressure break holes is respectively 1#, 2# and 3#, as shown in Fig. 2, 1# pressure break hole is by K9 roof
Direction passes through the coal seam K9, K8, K7, K5 and is drilled into the coal seam K4, and 2 # pressure break holes pass through K9, K8, K7 coal seam drilling by K9 roof direction
To the coal seam K5,3# pressure break hole passes through the coal seam K9 and K8 by K9 roof direction and is drilled into the coal seam K7；Due to K9 and K8 and K8 and K7
Coal seam spacing is smaller, at this point, K9, K8 and K7 are considered as same coal seam.By three determining pressure break holes by the area of tunnel piercing
Face is crept into, and sealing of hole is carried out after the completion of drilling, wherein 1# pressure break hole sealing of hole to K4 roof, 2# pressure break hole sealing of hole to K5
Roof, 3# pressure break hole sealing of hole to K9 roof, and ensure the pressure-bearing of sealing section not less than 35MPa.
Gas drainage includes the concentration extraction after hydraulic fracturing to tetra- coal seams K9, K8, K7, K5 and K4, and in tunnel
To i.e. by the independent extraction in the coal seam to be dug of digging at driving to 5~6m away from coal seam any in K9, K5 and K4, wherein individually
Extraction further include tunnel piercing to away from i.e. will at the 2.5~3.5m in the coal seam to be dug K9, K5 and K4 of digging progress.Gas drainage
After further include Gas Outburst parameter detecting, to judge whether tunnel can carry out safe driving；It is then to continue to tunnel；It is no, then continue
Extraction, and judge whether tunnel can carry out safe driving again by Gas Outburst parameter detecting.
When tunnel piercing is opened to the coal seam K9, K5 and K4, the concordant for Gas Outburst parameter prediction of constructing in coal seam
Coal seam prediction drilling predicts that drilling carries out the prominent parameter prediction of coal-bed gas by concordant coal seam, and judges whether tunnel can be into
Row safe coal-openning is then to continue exposed coal to passing through this coal seam；It is no, then gas drainage is carried out, and it is prominent to carry out coal-bed gas again
Parameter prediction and whether can carry out safe coal-openning judgement.
As shown in figure 3, further including the coal to coal measure strata section in the tunneling process of the Tunnel Passing coal measure strata section
Body and rock mass segmentation carry out advance support processing, which includes 9 being built into nothing in the coal and rock drilling of coal measure strata section
Steel pipe is stitched, is consolidated using cement grout, multiple seamless steel pipes are outside the outline excavation control line of tunnel middle and upper part and lateral wall
Setting regions in be interspersed by inside and outside two rows, and form canopy formula advance support structure.And in the advance support, seamless steel
Pipe is when meeting coal seam with being pierced by the coal seam at least part of 1.0m；9 diameters that drill are 89mm, and the latus rectum of seamless steel pipe is 50mm,
9 spacing of adjacent drilling of same row is 0.6~0.8m, and row's spacing of two row hole drillings 9 is 0.25~0.40m.
Since K3 thinning is seam, K1 is non-protruding coal seam, and therefore, second of concentration pressure break only needs to press the coal seam K2
Split anti-reflection, therefore, in tunnel piercing to when setting 10m away from K2, fracturing borehole of constructing, and pressure break is anti-reflection after sealing of hole, and to K2 and
K1 layers carry out concentration extraction, carry out, are carried out respectively twice at tunnel piercing to 5~6m away from the coal seam K2 and at 2.5~3.5m
Gas drainage further includes Gas Outburst parameter detecting after gas drainage, to judge whether tunnel can carry out safe driving；It is, then
Continue to tunnel；It is no, then continue extraction, and judge whether tunnel can carry out safe driving again by Gas Outburst parameter detecting.
When tunnel piercing is opened to the coal seam K2, the concordant coal seam prediction for Gas Outburst parameter prediction of constructing in coal seam
Drilling predicts that drilling carries out the prominent parameter prediction of coal-bed gas by concordant coal seam, and judges whether tunnel can be taken off safely
Coal is then to continue exposed coal to passing through this coal seam；It is no, then gas drainage is carried out, and carry out the prominent parameter prediction of coal-bed gas again
Whether safe coal-openning judgement can be carried out.
Embodiment 2, referring to fig. 4, a kind of large section tunnel pass through the concentration hydraulic fracturing drilling and sealing structure of multiple seam,
Including the multiple fracturing boreholes 1 being equal to each other with primary concentration pressure break number, sealing of hole dress is correspondingly arranged in each fracturing borehole 1
It sets, and hole sealing structure is formed by corresponding hole sealing device, hole sealing device protrudes into corresponding coal seam 3, sealing of hole by 2 direction of roof
Device includes pressure break pipe 4, grout pipe 5, and 4 inner end of pressure break pipe is formed with the floral tube section 4a of setting length, and floral tube section 4a passes through horse hair
Bars 6 are separated into section and floral tube outer segment in floral tube with tie part, and section is discharged for hydraulic fracturing in floral tube, on the outer wall of floral tube outer segment
It is wound at least one layer of gauze；Horsetail 6 is formed by the cotton yarn or fabric item being banded on pressure break pipe 4, and is located at coal
In layer top plate 2, sealing section is made of grout cures section 7 and polyurethane seal section 8.
Wherein, at least 1 meter of 6 length of horsetail is welded with horsetail 6 at the tie part of pressure break pipe 4 and ties up silk fastening with hanging
Nail；Outer at least 1 meter of the segment length of floral tube；At least 1.5 meters of 8 length of polyurethane sealing hole section.
Although combining attached drawing above describes embodiments of the present invention, those skilled in the art can also be with
Recognize to various changes can be made in scope of the appended claims or modification, these modifications and variations are understood as in this hair
Within bright range and intention.
Claims (5)
1. a kind of large section tunnel passes through the construction method of coal measure strata section, include the steps that hydraulic fracturing and gas drainage,
It is characterized in that,
The hydraulic fracturing successively carries out concentration pressure break to multiple pressure break holes using the Frac unit for being laid in tunnel the same area,
Before pressure break, data is surveyed according to the ground of coal measure strata section to be traversed, determines that coal measure strata section concentrates the concentration number of pressure break primary
At least two coal seams to be traversed of pressure break are concentrated, and the of the first coal seam 10m~12m to be traversed for once concentrating hydraulic fracturing
At one set distance, smart spy is carried out to coal seam to be traversed, to obtain the accurate ginseng of respectively coal seam thickness to be taken off and adjacent coal bed spacing
Number, and the respectively Gas Outburst parameter to the Methane Diffusion speed of exposed coal layer and pressure；Gas is determined according to Gas Outburst parameter
The projecting coal bed and primary fracturing borehole position for concentrating hydraulic fracturing and depth, and fracturing borehole is carried out to apply brill and sealing of hole；
The gas drainage includes the concentration extraction after hydraulic fracturing to more than two coal seams, and in tunnel piercing to any coal
To i.e. by the independent extraction in the coal seam to be dug of digging at the second set distance of layer 5m~6m；
The independent extraction further includes in tunnel piercing to i.e. by the third set distance of coal seam 2.5m~3.5m to be dug of digging
Place carries out.
2. the construction method that large section tunnel according to claim 1 passes through coal measure strata section, which is characterized in that described
It further include Gas Outburst parameter detecting after gas drainage, to judge whether tunnel can carry out safe driving；It is then to continue to tunnel；
It is no, then continue extraction, and judge whether tunnel can carry out safe driving again by Gas Outburst parameter detecting.
3. the construction method that large section tunnel according to claim 1 passes through coal measure strata section, which is characterized in that also wrap
It includes when tunnel piercing is opened to coal seam, drilling is predicted in the concordant coal seam for Gas Outburst parameter prediction of constructing in coal seam, is led to
It crosses the prediction drilling of concordant coal seam and carries out the prominent parameter prediction of coal-bed gas, and judge whether tunnel can carry out safe coal-openning, be, then
Continue exposed coal to passing through this coal seam；It is no, then gas drainage is carried out, and carry out the prominent parameter prediction of coal-bed gas again and whether may be used
Carry out safe coal-openning judgement.
4. large section tunnel described in claim passes through applying for coal measure strata section according to claim 1~any one of 3
Work method, which is characterized in that the sealing section of at least one in multiple pressure break holes has the coal seam passed through
Part.
5. large section tunnel described in claim passes through applying for coal measure strata section according to claim 1~any one of 3
Work method, which is characterized in that further include the coal to coal measure strata section in the tunneling process of the Tunnel Passing coal measure strata section
Body and rock mass segmentation carry out advance support processing, which includes entering steel in the coal and rock embedded in hole of coal measure strata section
Pipe, is consolidated, setting area of multiple steel pipes outside the outline excavation control line of tunnel middle and upper part and lateral wall using cement grout
Canopy formula advance support structure is formed in domain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139185.3A CN105756700B (en) | 2016-03-11 | 2016-03-11 | Large section tunnel wears the construction method and hole sealing structure of coal measure strata section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139185.3A CN105756700B (en) | 2016-03-11 | 2016-03-11 | Large section tunnel wears the construction method and hole sealing structure of coal measure strata section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105756700A CN105756700A (en) | 2016-07-13 |
| CN105756700B true CN105756700B (en) | 2019-01-22 |
Family
ID=56332946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610139185.3A Active CN105756700B (en) | 2016-03-11 | 2016-03-11 | Large section tunnel wears the construction method and hole sealing structure of coal measure strata section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105756700B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968675A (en) * | 2017-03-20 | 2017-07-21 | 中铁十五局集团有限公司 | The construction method in gas tunnel goaf |
| CN106869894B (en) * | 2017-03-21 | 2019-07-02 | 阳泉煤业（集团）有限责任公司 | Weak seam top plate concordant rock long drilled holes pump more coordinates pressure break anti-reflection method |
| CN107091111A (en) * | 2017-04-18 | 2017-08-25 | 中交路桥华南工程有限公司 | The gas preprocess method in tunnel |
| CN110067591A (en) * | 2018-01-24 | 2019-07-30 | 中铁二院工程集团有限责任公司 | Tunnel and flat lead pass through coal seam construction gas drainage method |
| CN109252829A (en) * | 2018-10-16 | 2019-01-22 | 中铁十九局集团第二工程有限公司 | Karst method for treating water in team road |
| GB2582376B (en) * | 2019-03-22 | 2021-06-09 | Hypertunnel Ip Ltd | Method and system of constructing an underground tunnel |
| CN110344830B (en) * | 2019-07-17 | 2020-10-30 | 中铁二院重庆勘察设计研究院有限责任公司 | Coal uncovering outburst prevention operation flow for continuous and multiple coal penetrating tunnel under complex structure condition |
| CN111335939A (en) * | 2020-04-08 | 2020-06-26 | 中国建筑第四工程局有限公司 | Hydraulic fracturing permeability-increasing process for super-thick coal seam of highway gas outburst tunnel |
| CN111779463A (en) * | 2020-08-18 | 2020-10-16 | 中国建筑第四工程局有限公司 | Coal uncovering outburst prevention construction method for super-thick coal seam of gas outburst tunnel of highway |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121395A (en) * | 2011-01-24 | 2011-07-13 | 平顶山天安煤业股份有限公司十矿 | Method for integrated comprehensive management of gas in low-permeability single coal bed |
| CN204827355U (en) * | 2015-08-11 | 2015-12-02 | 重庆市能源投资集团科技有限责任公司 | Nearly competent pressure -bearing drilling hole sealing structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155254B (en) * | 2011-02-28 | 2013-05-22 | 中国矿业大学 | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection |
| CN102242640B (en) * | 2011-07-05 | 2013-09-25 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
| CN102720528B (en) * | 2012-07-03 | 2014-05-14 | 中国矿业大学 | Underground coal mine repeating pulsation hydrofracture strengthened gas extracting method |
-
2016
- 2016-03-11 CN CN201610139185.3A patent/CN105756700B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121395A (en) * | 2011-01-24 | 2011-07-13 | 平顶山天安煤业股份有限公司十矿 | Method for integrated comprehensive management of gas in low-permeability single coal bed |
| CN204827355U (en) * | 2015-08-11 | 2015-12-02 | 重庆市能源投资集团科技有限责任公司 | Nearly competent pressure -bearing drilling hole sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105756700A (en) | 2016-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105756700B (en) | Large section tunnel wears the construction method and hole sealing structure of coal measure strata section | |
| CN110242301B (en) | Two-step grouting modification water-retention coal mining method for roof aquifer | |
| CN104694746B (en) | A kind of method of ion adsorption type re in_situ leaching and leaching ore deposit system thereof | |
| CN103291325B (en) | The preventing control method of Coal-mining Above Confined-water floor strata gushing water | |
| CN106194244B (en) | Lower permeability seam liquid phase CO2Phase transformation fracturing is anti-reflection grid type gas pumping method | |
| CN103821544B (en) | Tunneling and underground engineering high-pressure high-flow is dashed forward Water outburst treatment method | |
| CN108678777A (en) | The method for protecting support of Tunnel Crushed Zone section | |
| CN106979012B (en) | Hidden conduit pipe Comprehensive Treatment method in shaft of vertical well freezing hole | |
| CN108894727A (en) | The water-retaining method of ground level directional drilling slip casting closure overlying strata water producing fractures main channel | |
| CN103334770B (en) | One is grown up reverse-slope tunnel ultra high water pressure rich water zone of fracture construction method | |
| CN103867229B (en) | A kind of coal mine large-mining is dark prevents and treats comprehensive treatment method for water with lower group of coal mining | |
| CN109209293A (en) | A kind of crossdrift takes off projecting coal bed comprehensive outburst control construction method | |
| CN105909254B (en) | Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole | |
| CN109162731B (en) | Water inrush grouting treatment method for deep mining of iron mine area | |
| CN103089275A (en) | Control method of surrounding rocks in water-rich very-broken surrounding rock tunnel collapse sections | |
| CN105155563A (en) | Reinforcing and treating method for water burst of soft-flow muddy stratum of foundation pit | |
| CN101709651A (en) | Grouting water blocking method for undersea tunnel | |
| CN109098714A (en) | A kind of soft extremely irregularcoal seam fully mechanized coal face gob-side entry retaining method of high methane three | |
| Li et al. | A novel treatment method and construction technology of the pipeline gushing water geohazards in karst region | |
| CN108868776B (en) | The high pressure-bearing broken rock of deep-well induces pre-pouring grout reinforcement means in advance | |
| CN105909259B (en) | Existing shield tunnel pipe curtain construction settlement control system and method are closely worn down | |
| CN106917627A (en) | The advanced support method of pilot tunnel under a kind of water rich strata boring construction | |
| CN109488329A (en) | A kind of broken water drenching country rock administering method of Deep Soft Rock Tunnel large deformation | |
| CN207813651U (en) | A kind of ground water drainage system for double-hole tunnel | |
| CN106381405A (en) | Rare earth mine liquid collection system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |