CN108952796A - One kind being based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break - Google Patents
One kind being based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break Download PDFInfo
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- CN108952796A CN108952796A CN201810825919.2A CN201810825919A CN108952796A CN 108952796 A CN108952796 A CN 108952796A CN 201810825919 A CN201810825919 A CN 201810825919A CN 108952796 A CN108952796 A CN 108952796A
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- pressure break
- bottom plate
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- hole
- lane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention belongs to technical field of mine safety, it is related to a kind of based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break, in bottom plate lane to carrying out fracturing borehole among corresponding coal road, pressure break branched hole does not need to penetrate coal seam after drilling, pressure break main aperture length is 400~500m in bottom plate lane, pressure break main aperture and pressure break branched hole are oriented drilling and sealing and implement hydraulic fracturing, heading end starts to tunnel forwards after completing hydraulic fracturing, layer pre-draining borehole of wearing that pre-designed parameter is implemented at the rear of development end is carried out wearing a layer band and is taken out in advance, implement pectination bottom plate layer-through drilling into stope coal body bottom plate simultaneously and covers two stopes or a stope progress pressure break, pressure break terminates rear tube and takes out in advance, bottom plate lane driving can be greatly reduced in the present invention, the investment of rock gangway under the premise of effect is identical For a quarter of original method rock gangway investment, mine " pumping, excavation, mining " linking stressful situation is alleviated, it is safe and efficient to improve shaft production efficiency.
Description
Technical field
The invention belongs to technical field of mine safety, are related to a kind of based on the antireflective module of pectination bottom plate layer-through drilling pressure break
Change pumping method.
Background technique
The 210th article of " safety regulations in coal mine " regulation, there is the projecting coal bed of one of following condition, must not will be in this lane
Road is constructed takes out coal roadway stripe gas as region outburst prevention measures along coal bed drilling in advance:
One, New Built Mine is projecting coal bed.
Two, intensity of outburst occurred in history to be greater than 500t/ times.
Three, in limit of mining coal seam solid coefficient less than 0.3；Or coal seam solid coefficient is 0.3~0.5, and
Buried depth is greater than 500m's；Or coal seam solid coefficient is 0.5~0.8, and buried depth is greater than 600m's；Or coal seam buried depth is greater than
700m's；Or coal roadway stripe is located at exploitation stress concentration region.
Therefore the pre- pumping method that how research reduces bottom plate lane driving amount is even more important, existing region outburst prevention measures method
There are two classes: exploitation protective layer and pre- pumping coal-bed gas.The invention belongs to take out coal-bed gas technology in advance.Pre- coal-bed gas technology of taking out has
The pre- pumping coal-bed gas of concordant drilling and layer-through drilling take out two methods of coal-bed gas in advance:
The pre- coal-bed gas of taking out of concordant drilling is from existing heading to the projecting coal bed drilling constructed along coal seam, before adopting
Extraction coal gas, regional eliminating remove the outburst hazard of coal body, and getting higher Seams With Hazard of Outburst is that present low gas is endangered without prominent
Dangerous coal seam.It is from rock (or coal seam) tunnel in projecting coal bed working face bottom (top) portion to protrusion that layer-through drilling takes out coal-bed gas in advance
Coal seam, which is constructed, penetrates the drilling in coal seam, and extraction coal gas before adopting, regional eliminating removes the outburst hazard of coal body, and it is prominent to get higher gas
Dangerous coal seam is present low gas without dangerous seam with potential out.Meet three conditions in the 210th article of above-mentioned " safety regulations in coal mine "
Projecting mine, each stope must carry out the extinctions of layer-through drilling regionality using at least two floor roadway, and
Significant portion is located at rock section in layer-through drilling, and the drilling of coal seam section is short, so the utilization rate of layer-through drilling is extremely low, effect is identical
Under the premise of layer-through drilling investment be concordant drilling more than four times.
Summary of the invention
In view of this, the present invention is in order to solve existing concordant drilling technique there are constructional difficulties, progress are slow, for tight
It is big to there is a problem of that Technological Economy is put into terms of protruding the regional extinction in coal mine again, provides one kind based on pectination bottom plate and wears layer
The driving of floor roadway can be greatly reduced in the antireflective modularization pumping method of borehole fracturing, the present invention, and effect is mutually the same
The investment for putting rock gangway is a quarter of original method rock gangway investment, waterpower measure wherein included and directional long borehole technology
Can be with effective solution regionality extinction problem, this anti-reflection enhanced gas extraction technology of large area, alleviate mine " take out, pick,
Adopt " the nervous situation of linking, it is safe and efficient to improve shaft production efficiency.
In order to achieve the above objectives, the present invention provides a kind of based on the antireflective modularization extraction of pectination bottom plate layer-through drilling pressure break
Method, a bottom plate lane can cover 1~4 stope, cover two stopes with a bottom plate lane single-blade and are
Example, the pumping method of coal-bed gas the following steps are included:
A, directional drilling machine is placed on to the bottom plate lane heading end of design, heading end distance stops adopting the stopping pick of the line position about 30m
Into；
B, by directional drilling machine in bottom plate lane to carrying out fracturing borehole among corresponding coal road, pressure break branched hole after drilling
Diameter is 95mm, and the pitch of holes for latter two pressure break branched hole that drills is 40~60m, and pressure break branched hole does not need to penetrate coal seam, subtract
Lack a possibility that high pressure water is flowed along roof interface, pressure break main aperture length applies the warp of brill according to directional drilling machine in bottom plate lane
Ji property, which determines, is generally 400~500m, and pressure break main aperture and pressure break branched hole form bottom plate pectination and wear lamination ceasma；
C, pressure break main aperture and pressure break branched hole are oriented drilling and sealing and implement hydraulic fracturing, wherein fracturing borehole is sealed
Hole technique carries out sealing of hole using multiple injection hole sealing technique, and coal seam initial cracking pressure is 25~30MPa, and high-pressure pump water injection pressure is 35
~40MPa, pressure break branched hole single hole water injection rate is about 120m when pressure break3, subsequent pressure break branched hole water injection rate is according to this pressure break hole
Fracturing effect is adjusted, until reaching the frac pressure of needs and stopping pressure break after the pressure break time；
D, heading end starts to tunnel forwards after completing hydraulic fracturing, and pre-designed parameter is implemented at the rear of development end
It wears layer pre-draining borehole and carries out wearing a layer band and take out in advance；
E, stop when heading end is dug to directional drilling main aperture bottom hole depth, repeat B~D step until bottom plate lane and all
It wears the construction of layer band pre-draining borehole and finishes and connect pumpings, until coal can be tunneled after region outburst prevention measures validity check and area validation qualification
Layer tunnel；
F, while bottom plate lane is tunneled, directional drilling machine and ordi-nary drilling machine are staggered two back production of certain space position construction cross
The bottom plate pectination of working face wears lamination ceasma, and implements pressure break and all connect pumping；
G, with bottom plate lane wear the pre- stripping band of layer take out in advance it is up to standard, coal road also start tunnel and split pre-draining borehole according to lamination is worn
Regional prediction effect implement stope coal body concordant pre-draining borehole, while the crossheading of next stope due to
It has taken up region measure early period, therefore directly can directly be tunneled according to the inspection of region measure effect or second zone measure
And rear driving up to standard is examined, a bottom plate lane is eliminated, a large amount of cost has been saved.
Further, multiple injection hole sealing technique is in step C, after the completion of pressure break hole is constructed, transfers pressure break sealing of hole first
Pipe transfers 4 points of slurry recovering tubes afterwards in place, then transfers Grouting Pipe, metapore mouth is blocked using polyurethane in place for decentralization, to poly- ammonia
After ester solidification, the cement that the ratio of mud is 0.8~0.9 is injected by Grouting Pipe, after cement slurry sets 1 day, by Grouting Pipe to pressure
Slip casting in branched hole is split, after slurry recovering tube returns underflow, closes Grouting Pipe aperture valve, then passes through Grouting Pipe to pressure break branched hole
Interior injected clear water rinses Grouting Pipe and pressure break iron pipe, keeps slurry recovering tube aperture valve in opened condition after the completion of rinsing, cement slurry
After solidification 1 day slip casting is carried out into pressure break branched hole by slurry recovering tube again, after pressure break iron pipe returns slurry, closes slurry recovering tube aperture
Valve completes slip casting, after cement slurry sets 48 hours, can carry out hydraulic fracturing.
Further, pressure sensor monitoring aperture pressure is installed at the aperture of pressure break main aperture and pressure break branched hole in step C
Variation installs gas concentration sensor in return side, monitors the variation ofgas density feelings of pressure break main aperture and pressure break branched hole periphery
Condition installs camera in pressure break main aperture and pressure break branched hole aperture, observes aperture situation, pressure break main aperture and pressure break branched hole in real time
Pressure sensor is installed in aperture, is realized the remote accurate monitoring of pressure change in hole, is installed stream in high-pressure pump injection system pipeline
Meter is realized and constantly monitors flow and accumulative water injection rate.
Further, warning line is set at entrance to a lane position in step C bottom plate lane and the fracturing pump front and back position 50m.
The beneficial effects of the present invention are:
1, disclosed in this invention to be based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break, when a bottom
Plate lane construct after, the pre- stripping band in the top that this bottom plate lane is covered wear layer fracturing borehole also construct finish simultaneously pressure break at
Function, band wear a layer pre-draining borehole construction and finish and all connect pumping, the module including two stopes and tunnel band coal body
Pressure break finishes and connects pumping.After the region outburst prevention measures validity check and area validation qualification of wearing the pre- stripping band of layer above bottom plate lane
Top coal road can be tunneled, also visual verification result implements second zone measure or driving to other two bands.Heading is opened
Implement stope concordant drilling progress region after beginning driving at once to take out in advance, above all of Driving Face in Coal Tunnel concordant is pre-
Draining borehole, stope concordant pre-draining borehole, layer pre-draining borehole is worn all in bottom plate lane is after hydraulic fracturing anti-reflection measure
Coal body in implement.Entire modularization pumping method improves prior art constructional difficulties, complex process, causes very greatly to mine side
Financial burden, the disadvantages of period is long, modularization pumping method construction of the present invention is easy, and simple process can achieve expected effect
Fruit, the cost that can save 50% simultaneously can reach extinction purpose.
2, disclosed in this invention to be based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break, in bottom plate lane
Fracturing borehole is carried out among to corresponding coal road, pressure break branched hole does not need to penetrate coal seam after drilling, reduces high pressure water along coal seam
A possibility that top plate interface flows.Pressure break main aperture length is 400~500m in bottom plate lane, by pressure break main aperture and pressure break branched hole
It is oriented drilling and sealing and implements hydraulic fracturing, heading end starts to tunnel forwards after completing hydraulic fracturing, after development end
Layer pre-draining borehole of wearing that side implements pre-designed parameter is carried out wearing a layer band and is taken out in advance, while into stope coal body bottom plate
Implement pectination bottom plate layer-through drilling two stopes of covering or a stope carries out pressure break, pressure break terminates rear tube
It is pre- to take out；When bottom plate lane and it is all wear the construction of layer band pre-draining borehole finish connect pumping when, pectination bottom plate in stope bottom plate
Also pressure break finishes and all connects pumping layer-through drilling.After pre- after a period of time take out, wear layer band take out in advance effect it is up to standard when, bottom plate lane
The stope crossheading of top can start to tunnel, and the crossheading of next stope can also be according to the pectination in bottom plate
Region measure rear driving up to standard is tunneled or supplemented to the pre- pumping effect of bottom plate layer-through drilling to determine it.The present invention can be significantly
The driving for reducing bottom plate lane solves the area in serious prominent coal mine in conjunction with waterpower measure technology and directional long borehole technology
Techno-economic question in terms of the extinction of domain property.Coal roadway stripe watt will must not be taken out in advance along coal bed drilling in this roadway construction for those
This provides a kind of completely new solution as the region protrusion-dispelling technology of the projecting mine of region outburst prevention measures.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is the floor map that modularization extraction pectination bottom plate of the present invention wears that anti-reflection drilling is split in lamination；
Fig. 2 is the diagrammatic cross-section that modularization extraction pectination bottom plate of the present invention wears that anti-reflection drilling is split in lamination；
Fig. 3 wears lamination for modularization extraction pectination bottom plate of the present invention and splits the diagrammatic cross-section for wearing layer band in anti-reflection drilling；
Fig. 4 is that modularization extraction pectination bottom plate of the present invention wears lamination and splits multiple injection hole sealing technique section in anti-reflection drilling and shows
It is intended to.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
Hydraulic fracturing is to make a kind of smooth measure of coalmass crevasse using water as power.Hydraulic fracturing anti-reflection technology is exactly
It is pressed into high pressure water to coal seam by drilling, when natural water absorbing capacity of the speed that hydraulic pressure enters far more than coal seam, since flowing hinders
Power increases, and the fluid pressure into coal seam is gradually increasing, and when being more than the rock pressure above coal seam, in coal seam original closure crack
New distribution network will be formed by pressing off, coal seam permeability just will increase.When the liquid of indentation is discharged, the crack that presses off
Just good condition is created for the flowing of coal-bed gas.
While hydraulic fracturing anti-reflection, the outburst hazard in coal seam can reduce: (1) physico-mechanical properties in coal seam being changed
It is changed into use: there is pressure break effect, crack can be made constantly to penetrate through, expand by hydraulic fracturing, expand wetting radius, and generate
The repeated action of " expansion-contraction-expansion ", changes to maximum magnitude the physico-mechanical properties in coal seam；(2) displacement of gas is made
With: so that water is penetrated into the crack of different pore size, in hole to greatest extent by hydraulic fracturing, increases coal body to the maximum extent
Wetability can come out the methane gas displacement in different holes；(3) change the regularity of distribution of crustal stress: hydraulic fracturing can make
Obtaining stress in front of working face and being acted on by the transmitting of hydraulic pressure becomes more uniform, causes to reduce since Stress non-homogeneity is distributed
Coal Outburst risk.
After coal seam with gas implements hydraulic fracturing, gas density is significantly increased with extraction amount in the extraction borehole short time,
Extraction speed is accelerated, coal seam gas-bearing capacity is reduced, is the effective technology means for improving extraction efficiency.
Technical characterstic of the directional drilling machine due to its construction: dynamical system is placed in bottom hole, at high cost；Construction drill depth is general
Relatively deep, economic depth is mostly 300~500m；Drilling machine placement position is relatively fixed, is not easy frequent movement.So to construction medium
Hardness factor f require generally between 1~7, too soft easy collapse hole loss is big, and too hard drilling depth is difficult；Pressure break radius one
As in 15~20m, it is ensured that 30~40m of directional drilling machine is mobile primary.
One kind being based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break, a bottom plate as shown in Fig. 1~2
Lane can cover 1~4 stope, by taking a bottom plate lane single-blade covers two stopes as an example, coal-bed gas
Pumping method the following steps are included:
A, directional drilling machine is placed on to the bottom plate lane heading end of design, heading end distance stops adopting the stopping pick of the line position about 30m
Into.
B, by directional drilling machine in bottom plate lane to carrying out fracturing borehole as shown in Figure 3 among corresponding coal road, after drilling
The diameter of pressure break branched hole is 95mm, and the pitch of holes for latter two pressure break branched hole that drills is 40~60m, and pressure break branched hole does not need
Coal seam is penetrated, a possibility that high pressure water is flowed along roof interface is reduced, pressure break main aperture length is according to orientation in bottom plate lane
The economy that drilling machine applies brill, which determines, is generally 400~500m, and pressure break main aperture is worn lamination with pressure break branched hole formation bottom plate pectination and split
Hole.
C, pressure break main aperture and pressure break branched hole are oriented drilling and sealing and implement hydraulic fracturing, wherein fracturing borehole is sealed
Hole technique carries out sealing of hole using multiple injection hole sealing technique as shown in Figure 4, after the completion of pressure break hole is constructed, transfers pressure break first
Hole sealing tube transfers 4 points of slurry recovering tubes afterwards in place, then transfers Grouting Pipe, and metapore mouth is blocked using polyurethane in place for decentralization, to
After polyurethane solidification, the cement that the ratio of mud is 0.8~0.9 is injected by Grouting Pipe and passes through Grouting Pipe after cement slurry sets 1 day
The slip casting into pressure break branched hole closes Grouting Pipe aperture valve after slurry recovering tube returns underflow, is then divided by Grouting Pipe to pressure break
Injected clear water in branch hole rinses Grouting Pipe and pressure break iron pipe, keeps slurry recovering tube aperture valve in opened condition after the completion of rinsing, water
Mud passes through slurry recovering tube after solidifying 1 day and carries out slip casting into pressure break branched hole again, after pressure break iron pipe returns slurry, closes slurry recovering tube
Aperture valve completes slip casting, after cement slurry sets 48 hours, can carry out hydraulic fracturing.
Coal seam initial cracking pressure is 25~30MPa, and high-pressure pump water injection pressure is 35~40MPa, pressure break branched hole list when pressure break
Hole water injection rate is about 120m3, subsequent pressure break branched hole water injection rate is adjusted according to this pressure break hole fracturing effect, until reaching needs
The frac pressure wanted and stop pressure break after the pressure break time.
Furthermore in order to preferably obtain fracturing effect, in pressure break implementation process, water injection pressure and flow must constantly be monitored.By
Remote-controlled operation is used in test, due to elevation drop, the presence of the factors such as pipeline frictional resistance, the pressure monitored at fracturing pump
Power is only that the differing pressure in pump injection pressure power, with pressure break hole is very remote, to accurately calculate and implementing pressure change in monitoring holes, test
Middle design installs pressure sensor in pressure break hole aperture, realizes the remote accurate monitoring of pressure change in hole.Flow and accumulative
Injection rate can install flowmeter in pump injection system pipeline, and realization constantly monitors.
Due in hydraulic fracturing process, pump group, high-pressure rubber pipe in pressure break hole are high pressure water, in order to guarantee safety, in slot
Warning line is set at the position 50m before and after entrance to a lane position and fracturing pump, during test, irrelevant personnel is forbidden to enter test area.
Start to carry out hydraulic fracturing work after the completion of preparation.During hydraulic fracturing test, test parameters, observation examination are recorded in real time
Test phenomenon.
After the completion of preparation, warning line is set, turn on pump carries out hydraulic fracturing.In fracturing process, seen by camera
Examine pressure break hole aperture situation, pay close attention to pressure change, when pressure oscillation be more than 10MPa or pump injection pressure insist on continuous 40MPa with
When upper, termination of pumping release is checked, is handled in time when having other exceptions.When fracturing process reaches design water injection rate, termination of pumping, closing
Aperture high pressure valve, release check equipment and pipeline.It closes the pressure maintaining of aperture valve 7 days.
D, heading end starts to tunnel forwards after completing hydraulic fracturing, and pre-designed parameter is implemented at the rear of development end
It wears layer pre-draining borehole and carries out wearing a layer band and take out in advance；
E, stop when heading end is dug to directional drilling main aperture bottom hole depth, repeat B~D step until bottom plate lane and all
It wears the construction of layer band pre-draining borehole and finishes and connect pumping, until region outburst prevention measures validity check and area validation qualification can tunnel coal seam
Tunnel；
F, while bottom plate lane is tunneled, directional drilling machine and ordi-nary drilling machine are staggered two back production of certain space position construction cross
The bottom plate pectination of working face wears lamination ceasma, and implements pressure break and connect pumping；
G, with bottom plate lane wear the pre- stripping band of layer take out in advance it is up to standard, coal road also start tunnel and split pre-draining borehole according to lamination is worn
Regional prediction effect implement stope coal body concordant pre-draining borehole, while the crossheading of next stope due to
It has taken up region measure early period, therefore directly can directly be tunneled according to the inspection of region measure effect or second zone measure
And rear driving up to standard is examined, a bottom plate lane is eliminated, a large amount of cost has been saved.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (4)
1. one kind is based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break, which is characterized in that a bottom plate lane
1~4 stope can be covered, by taking a bottom plate lane single-blade covers two stopes as an example, pumping method includes
Following steps:
A, directional drilling machine is placed on to the bottom plate lane heading end of design, heading end distance stops adopting the line position about 30m stopping driving；
B, by directional drilling machine in bottom plate lane to implementing fracturing borehole among corresponding coal road, the diameter of pressure break branched hole after drilling
For 95mm, the pitch of holes for latter two pressure break branched hole that drills is 40~60m, and pressure break branched hole does not need to penetrate coal seam, is reduced high
A possibility that water is along the flowing of roof interface is pressed, pressure break main aperture length applies the economy of brill according to directional drilling machine in bottom plate lane
It determines and is generally 400~500m, pressure break main aperture and pressure break branched hole form bottom plate pectination and wear lamination ceasma；
C, pressure break main aperture and pressure break branched hole are oriented drilling and sealing and implement hydraulic fracturing, wherein fracturing borehole sealing of hole work
Skill using multiple injection hole sealing technique carry out sealing of hole, coal seam initial cracking pressure be 25~30MPa, high-pressure pump water injection pressure be 35~
40MPa, pressure break branched hole single hole water injection rate is about 120m when pressure break3, subsequent pressure break branched hole water injection rate is according to this pressure break pore pressure
It splits effect to be adjusted, until reaching the frac pressure of needs and stopping pressure break after the pressure break time；
D, heading end starts to tunnel forwards after completing hydraulic fracturing, and what pre-designed parameter was implemented at the rear of development end wears layer
Pre-draining borehole carries out wearing a layer band to be taken out in advance；
E, stop when heading end is dug to directional drilling main aperture bottom hole depth, repeat B~D step until bottom plate lane and all wearing layer
The construction of band pre-draining borehole, which finishes, connects pumping, until can tunnel coal seam lane after region outburst prevention measures validity check and area validation are qualified
Road；
F, while bottom plate lane is tunneled, directional drilling machine and ordi-nary drilling machine are staggered two actual minings of certain space position construction cross
The bottom plate pectination in face wears lamination ceasma, and implements pressure break and all connect pumping；
G, the pre- stripping band of layer being worn with bottom plate lane and taking out in advance up to standard, coal road also starts driving and splits the area of pre-draining borehole according to lamination is worn
Domain prediction effect implements the concordant pre-draining borehole of stope coal body, while the crossheading of next stope is due to early period
It has taken up region measure, therefore directly can directly be tunneled or second zone measure and be examined according to the inspection of region measure effect
Rear driving up to standard is tested, a bottom plate lane is saved.
2. modularization pumping method as described in claim 1, which is characterized in that multiple injection hole sealing technique is in step C,
After the completion of the construction of pressure break hole, pressure break hole sealing tube is transferred first, is transferred 4 points of slurry recovering tubes afterwards in place, is then transferred Grouting Pipe, transfer to
Aperture is blocked using polyurethane behind position, after polyurethane solidification, injects the water that the ratio of mud is 0.8~0.9 by Grouting Pipe
Mud after cement slurry sets 1 day, by Grouting Pipe slip casting into pressure break branched hole, after slurry recovering tube returns underflow, closes slip casting pore
Mouth valve rinses Grouting Pipe and pressure break iron pipe then by Grouting Pipe injected clear water into pressure break branched hole, guarantor after the completion of rinsing
It holds slurry recovering tube aperture valve in opened condition, is infused again into pressure break branched hole after cement slurry sets 1 day by slurry recovering tube
Slurry closes slurry recovering tube aperture valve after pressure break iron pipe returns slurry, completes slip casting, after cement slurry sets 48 hours, can carry out water
It forces and splits.
3. modularization pumping method as claimed in claim 2, which is characterized in that pressure break main aperture and pressure break branched hole in step C
Aperture at pressure sensor monitoring aperture pressure change is installed, install gas concentration sensor in return side, monitor pressure break master
The variation ofgas density situation in hole and pressure break branched hole periphery installs camera in pressure break main aperture and pressure break branched hole aperture, real
When observe aperture situation, pressure sensor is installed in pressure break main aperture and pressure break branched hole aperture, realizes the long distance of pressure change in hole
From accurate monitoring, flowmeter is installed in high-pressure pump injection system pipeline, realizes and constantly monitors flow and accumulative water injection rate.
4. modularization pumping method as claimed in claim 3, which is characterized in that entrance to a lane position in step C bottom plate lane and pressure break
Warning line is arranged at the position 50m in pump front and back.
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| CN201810825919.2A CN108952796B (en) | 2018-07-25 | 2018-07-25 | One kind being based on the antireflective modularization pumping method of pectination bottom plate layer-through drilling pressure break |
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| CN109915197A (en) * | 2019-04-11 | 2019-06-21 | 河南理工大学 | A kind of method that rock gangway km directional long borehole substitution middle part bottom pumping rock gangway is taken out at bottom |
| CN111173555A (en) * | 2020-01-07 | 2020-05-19 | 山西晋煤集团技术研究院有限责任公司 | Drilling and punching integrated construction process for comb-shaped long drilling hole of bottom suction roadway |
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| CN112065355A (en) * | 2019-12-06 | 2020-12-11 | 中国石油天然气股份有限公司 | Exploitation well pattern and heavy oil reservoir exploitation method of single horizontal well and comb-shaped horizontal well |
| CN112324337A (en) * | 2020-11-05 | 2021-02-05 | 河南神火煤电股份有限公司 | Whole-process gas extraction method for through-layer top comb-shaped drilling of bottom plate of soft coal seam |
| CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
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| CN109763857A (en) * | 2019-04-01 | 2019-05-17 | 中煤科工集团西安研究院有限公司 | Administering method is taken out in the coal-bed gas extinction in lane to be dug of the intensive pectination hole drilling type of water jet in advance |
| CN109915197A (en) * | 2019-04-11 | 2019-06-21 | 河南理工大学 | A kind of method that rock gangway km directional long borehole substitution middle part bottom pumping rock gangway is taken out at bottom |
| CN112065355A (en) * | 2019-12-06 | 2020-12-11 | 中国石油天然气股份有限公司 | Exploitation well pattern and heavy oil reservoir exploitation method of single horizontal well and comb-shaped horizontal well |
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| CN111827958A (en) * | 2020-07-27 | 2020-10-27 | 中煤科工集团重庆研究院有限公司 | Method for treating coal face gas of ground well in tree-shaped mining area |
| CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
| CN112324337A (en) * | 2020-11-05 | 2021-02-05 | 河南神火煤电股份有限公司 | Whole-process gas extraction method for through-layer top comb-shaped drilling of bottom plate of soft coal seam |
| CN112593998A (en) * | 2020-12-11 | 2021-04-02 | 山西晋煤集团技术研究院有限责任公司 | Progressive gas treatment method for soft low-permeability outburst coal seam area |
| CN112593998B (en) * | 2020-12-11 | 2023-10-13 | 山西晋煤集团技术研究院有限责任公司 | Progressive gas control method for soft low-permeability outburst coal seam area |
| CN113417636A (en) * | 2021-05-31 | 2021-09-21 | 中煤科工集团重庆研究院有限公司 | Accurate hydraulic fracturing process for comb-shaped layer-through directional long-drilling branch hole coal seam section |
| CN113417636B (en) * | 2021-05-31 | 2022-07-15 | 中煤科工集团重庆研究院有限公司 | Comb-shaped through-layer directional long-drilling-hole branch-hole coal seam section accurate hydraulic fracturing process |
| CN113756776A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Large-inclination-angle multi-media component pipe column system for segmented fracturing |
| CN113756775A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Hydraulic permeability increasing process for large-dip-angle low-permeability coal seam |
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