CN109139092A - A kind of multi-purpose construction method in a hole for administering buried Coal Seam and Gas Disaster - Google Patents
A kind of multi-purpose construction method in a hole for administering buried Coal Seam and Gas Disaster Download PDFInfo
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- CN109139092A CN109139092A CN201811149125.5A CN201811149125A CN109139092A CN 109139092 A CN109139092 A CN 109139092A CN 201811149125 A CN201811149125 A CN 201811149125A CN 109139092 A CN109139092 A CN 109139092A
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- 239000003245 coal Substances 0.000 title claims abstract description 86
- 238000010276 construction Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 119
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000002775 capsule Substances 0.000 claims abstract description 20
- 239000012141 concentrate Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 238000000605 extraction Methods 0.000 claims description 42
- 230000003628 erosive effect Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 12
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- 239000003292 glue Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 abstract description 5
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- 238000005065 mining Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
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Classifications
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- 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
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- 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
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of holes for administering buried Coal Seam and Gas Disaster to be mostly used construction method, comprising the following steps: determines the spacing of wells, drilling construction determines that actual stress concentrates band, borehole sealing and gas drainage, the abundant release in coal seam and high pressure water injection.Preferably, described to block to be blocked using the first time of expanded capsule, second of complete borehole sealing is carried out with hole sealing agent again after the abundant release in coal seam.The improvement while present invention is able to achieve buried Bumping Pressure in Coal Layers and Gas Disaster, it determines that the spacing of wells and drillable length, working face drill release, the twice process procedures such as borehole sealing, gas drainage, water filling using reasonable, efficiently realizes that a hole is multi-purpose, purpose of cost efficiency.Method of the invention is simple, easily operated, can make full use of the multiple efficacies of drilling, avoids drilling construction in the prior art and there is repeatability and wasteness.
Description
Technical field
The present invention relates to coal mine technical field of construction, more particularly to a kind of buried Coal Seam and Gas Disaster administered
One hole is mostly used construction method.
Background technique
Due to lasting extensive coal mining, the superficial part coal resources in China majority mining area are gradually decreased, deep mining
The new normality of the following Coal Industrial will be become.Gas bearing capacity in deep fractures is gradually increased with crustal stress, and mining conditions are disliked
Bad, bump and the threat of Gas Disaster bring increasingly increase, and seriously affect mine safety production.
Bump is administered both at home and abroad and Achievements of Gas Control has carried out a large amount of research, proposition is a variety of to pass through drop
Low coal seam stores the mode of energy to administer the measure of bump, as coal-bed flooding, large diameter borehole release, deep hole presplitting are quick-fried
It breaks, and gas control is also formed to improve gas drainage rate as the technical measures of core, as hydraulic fracturing, waterpower are cut
Seam, hydraulic flushing in hole etc..The research achievement of comparative maturity is to lay particular emphasis on some aspect at present, individually to bump or gas
Disaster is administered.However, there is gas spatial abnormal feature in deep in most coal seams with bump-prone property in recent years
Area, and previous coal and gas prominent coal seam then shows apparent Burst Tendency in deep regional, causes mine to need same
When face the threat of two kinds of impact, gas disasters.If the threat of two kinds of disasters cannot be dealt carefully with, mine will bear huge
Disaster, such as on 2 14th, 2005, bump accident had occurred in Liaoning Sun Jiawan coal mine, leads to certain driving face office
Portion's blowing-out forms methane accumulation, and the gas density in return reaches explosion limit, and worker generates electrical fire in maintenance process
Flower causes gas explosion, causes 214 worker's death.
The Treatment process of existing bump is mainly based upon coal rock strength reduction and subtracts and rush principle, passes through construction release
Drilling is crushed coal and rock using all kinds of measures, reduces the ability of coal rock layer storage and release elasticity energy, is formed in coal and rock
One reduction energy-absorbing band, realizes the purpose of erosion control.And existing gas control technology then lays particular emphasis on gas drainage, it is anti-reflection by release
Measure improves gas permeability of coal seam, and all kinds of extraction boreholes are arranged in coal seam, utilizes the gas of preservation in extraction pumping plant extraction coal seam
Gas reduces gas bearing capacity in coal seam, reduction gas pressure, realizes the purpose of Gas Disaster prevention and treatment.As it can be seen that two kinds of disasters
To be effectively prevented using drilling (large diameter borehole).For not only there is Gas Disaster but also exist impact disaster mine and
Speech, construction drill can more play the multi-purpose effect in a hole.
However, since the extraction radius of mash gas pumping drilling determines drilling arrangement distance, and the arrangement of erosion control drilling is then
Only consider release radius.When extraction radius and release radius have differences, it will lead to drilling and arrange uncoordinated problem.And
And in most cases, it may appear that mash gas pumping drilling length is much larger than the length of erosion control drilling, and the density of erosion control drilling is then remote
Less than extraction borehole layout density, the drilling construction for impacting coal seam containing gas is made to there is repeatability and wasteness.
In current published document, the arrangement of drilling considers the improvement of single disaster, does not consider coal-bed gas and punching
Press the improvement of compound disaster with hitting.As certain invention is related to one kind for deformation of the surrounding rock in tunnel, impulsion pressure, coal and gas prominent
Comprehensive processing method, this method first two lane of working face use anchor pole active defense technology, strengthen Surrounding Rock Strength, then exist
Every 3-3.5m construction major diameter destressing borehole between anchor pole, and sealing of hole is carried out to major diameter destressing borehole, then at a certain distance
Construction firedamp taking-out discharging drilling, extraction coal-bed gas.The spacing in pressure relief vent and extraction hole does not consider practical take out in the inventive method
Radius and release radius are adopted, and the length of pressure relief vent is too short, it is difficult to realize that a hole is multi-purpose, cause certain waste.
A kind of another high inclination-angle thick gassy coal seam of disclosure of the invention impacts diaster prevention and control method, A, arrangement gas drainage lane
Road: according to the lithology being respectively layered in stratum, cloth top set takes out the lane Xiang Hedichou；B, drilling arrangement: along the lane the Ding Chou lane bottom plate Ji Dichou
Top plate arranges bore position, arranged for interval water injecting drilling and mash gas pumping drilling on the same plumb cut in gas drainage tunnel；
C, after drilling deploys, gas drainage persistently gas drainage and water filling: is carried out to entire working face coal seam；Gas drainage work
After beginning, high pressure water is injected to the contact surface of coal seam and rock stratum, water filling work is successively carried out according to water injecting drilling sequence；D, terminate
Water filling: when first pouring water into borehole pressure drops suddenly to low value or extraction goes out gas humidity and is substantially reduced, stop drilling note
Water, and continue high pressure water injection using next water injecting drilling.The inventive method needs to arrange two stone heads, utilizes rock
Tunnel construction drill into coal seam.The expense of construction stone head is high, to the biggish financial burden of mine；To remote in tunnel
When locating coal body construction drill, the length of drilling is then very big, and bore inclining, curved existing necessarily occurs in actual work progress
As, it is difficult to realize the accurate extraction of gas.
Therefore, it is necessary to invent it is a kind of can make full use of drilling multiple efficacies construction method, realize coal seam erosion control, watt
This is administered and the coordination of depositing dust and other effects, to achieve the purpose that cost efficiency.
Summary of the invention
It is multi-purpose that the present invention for above-mentioned defect provides a kind of hole for administering buried Coal Seam and Gas Disaster
Construction method.The technical problem to be solved by the present invention is to overcome erosion control drilling, mash gas pumping drilling and water filling in the prior art
The problems such as spacing of drilling is unreasonable, repetition drills, drilling utilization rate is low, hazard management is inefficient.
The technical scheme is that a kind of multi-purpose construction method in a hole for administering buried Coal Seam and Gas Disaster, packet
Include following steps:
(1) determine spacing of wells L1: the coal bed gas extraction effective radius R1 and erosion control drilling for measuring stope are effectively unloaded
Radius R2 is pressed, the spacing L1 of two neighboring drilling is 2 times of smaller value in R1 and R2 in stope；
(2) drilling construction: along stope, drilling by the spacing of wells L1 to the direction construction concordant perpendicular to tunnel,
The length of drilling is 2/3rds of stope width H；
(3) determine that actual stress concentrates band: there is the initial of bump generation omen in record in real time during drilling construction
Position and final position, the drilling region between the initial position and final position are that the actual stress of stope is concentrated
Band；
(4) borehole sealing and gas drainage: the drilling of the initial position of band is concentrated to block actual stress, indwelling in drilling
Communicating pipe, compartment of terrain selects drilling as water injecting drilling later, dry with communicating pipe and underground extraction respectively using extraction water injection pipe
Pipe connection, carries out gas drainage；It is other drilling be used as mash gas pumping drilling, using gas drainage pipe respectively with communicating pipe and underground
The connection of extraction main pipe, carries out gas drainage；
(5) the abundant release in coal seam: repeating step (2) to (4), successively construct in stope, until in stope
It is covered with concordant drilling；
(6) high pressure water injection:, will as the 65%-80% for measuring gas drainage total amount and reaching the total gas bearing capacity in coal seam, preferably 70%
Extraction water injection pipe and gas drainage pipe are disconnected with underground extraction main pipe, and extraction water injection pipe is connect with high pressure water-injection pump,
High pressure water injection is carried out to coal seam by water injecting drilling, until being discharged in the gas drainage pipe of neighbouring mash gas pumping drilling.
Specifically, the aperture of drilling is 94mm, 113mm, 133mm or 153mm in step (2).
Specifically, the bump occurs omen and is top brill, bit freezing, inhales brill or coal big gun in step (3).
Preferably, described to block to block for the first time in step (4), expanded capsule is sent into the drilling to be blocked, it is described
Expansion glue cuff injects high pressure water into expanded capsule outside communicating pipe, using water injection pipe, blocks the expansion of expanded capsule water-filling
Drilling, water filling pipe end connect water pressure gauge；And carry out second after step (5) and block, each pouring water into borehole of observational record
The pressure gauge registration of pipe end, after some pouring water into borehole hook gauge registration no longer changes, using sealing compound to drilling orifice
Region is blocked, and carries out injection hole sealing to bore inner using hole sealing agent later.Preferably, the pressure of the high pressure water is 1-
1.5MPa.Preferably, sealing compound is polyurethane, and hole sealing agent is cement mortar.
Preferably, the drilling orifice region refers to the region 1m in aperture.
Preferably, in step (4), compartment of terrain, which selects drilling as water injecting drilling, is implemented as got off: by being constructed
Concordant drills successively marked as Kn, n=1,2,3 ..., and label is selected to meet the drilling of Kn=3n-1 as water injecting drilling.
Specifically, the buried coal seam is that buried depth is greater than 600m and presses and Gas Disaster with having potential impact simultaneously
Coal seam.
The invention has the benefit that
1, due to having the coal seam of impact and Gas Disaster to need to consider simultaneously between mash gas pumping drilling and erosion control destressing borehole
Away from, for avoid drilling repeatability, need to obtain the gas drainage effective radius and effective release radius in coal seam first.Test side
Method is currently more mature, therefore can be by drilling to obtain in stope construction testing.When obtaining two radius values
Afterwards, the reasonable spacing that 2 times of small radii value can be arranged as later period drilling, and with the three of stope width H
/ bis- be drillable length.Density appropriate and length make drilling be not only suitable for gas drainage, are also applied for erosion control release, and
And the drilling for allowing that label is selected to meet Kn=3n-1 is as water injecting drilling, therefore present invention drilling while having gas drainage, height
Pressure injection water, erosion control release effect avoid the later period to administer a certain disaster and need individually to supplement and bore to realize that a hole is multi-purpose
The problem of hole.
2, it after obtaining the reasonable spacing of wells, can successively construct large diameter borehole in tunnel to stope, entirely
Stope is required to construction drill, to realize zonal release.It can gush out in order to avoid drilling construction terminates after gas,
It needs to carry out closure extraction in time to drilling.However, coal petrography stress transfer process can be right during due to adjacent drilling construction
The drilling that early period, construction terminated impacts.Therefore, the drilling that early period, construction terminated is preferably formed with sufficient deformation space, for unloading
Except high stress.Borehole sealing mode at this time must assure that coal petrography can deform, and gas will not also be gushed out, this means that
The sealing of hole mode of traditional cements mortar is temporarily not suitable for.The closure of fixed point, and glue may be implemented by the way of expanded capsule
After capsule outer wall is sufficiently coupled with drilling, coal petrography stress can be applied on capsule, and the variation of hydraulic pressure can reflect the area in capsule
The actual stress in domain changes.And when hydraulic pressure is no longer changed, illustrate that coal deformation has been completed in the region, and release is imitated
Fruit has been tended towards stability, and can will be drilled using modes such as cement mortar block completely at this time, to carry out gas drainage.
3, in borehole sealing link, block-up position should be the region of stress concentration in coal seam.Stress of coal seam concentrates band at present
Determination generally use Method for Numerical, empirical method or theoretical analysis, but these methods are all indirect method, as a result not quasi- enough
Really, actually not necessarily meet with engineering.For buried coal seam, under the conditions of high stress high methane, easily exist in drilling construction
Top brill, bit freezing etc., which occur, for extending stress band can be used as the dynamic phenomenon that omen occurs for bump.Pass through these of work progress
Dynamic phenomenon can realize the accurate identification of extending stress band, not need to be tested using other indirect methods again.
4, after using drilling to the abundant release in coal seam, the coal body around the group that drills obtains fully deformed, crack opens, watt
Stone road is formed, and gas drainage efficiency reaches highest at this time.And gas is by after a large amount of extractions, Coal matrix shrinkage, crack passage into
One step is opened.Opportunity at this time is most suitable for the injection of high pressure water, can use high pressure water-injection pump and fills the water into drilling, realizes effective
While depositing dust, it can also allow and soften coal body, stress of coal seam is allowed further to be shifted.The method of the present invention makes full use of drilling to unload
The best opportunity of pressure, gas drainage and coal-bed flooding efficiently realizes that the release erosion control, extraction prevention and treatment gas, water filling in coal seam are anti-
Control multiple effects such as dust.
Detailed description of the invention
Fig. 1 is that the constructing structure of the multi-purpose construction method in a hole of the buried Coal Seam of improvement and Gas Disaster of the invention shows
It is intended to；
Fig. 2 is the drilling and sealing schematic diagram of the method for the present invention；
Fig. 3 is the water injecting pump connection schematic diagram of the method for the present invention；
Fig. 4 is the techniqueflow chart of the method for the present invention.
In figure, 1, stope；2, tunnel；3, concordant drills；4, expanded capsule；5, water injection pipe；6, water pressure gauge；7, it takes out
Adopt water injection pipe；8, communicating pipe；9, underground extraction main pipe；10, valve；11, gas drainage pipe；12, polyurethane；13, grouting pump；
14, Grouting Pipe；15, high pressure water-injection pump.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Embodiment 1
The present embodiment provides a kind of holes for administering buried Coal Seam and Gas Disaster to be mostly used construction method, and it is big to be included in buried depth
In 600m and have in the buried coal seam of bump and Gas Disaster simultaneously and implement the steps of:
(1) it is reduced using the coal bed gas extraction effective radius R1 of conventional method test stope 1, such as gas pressure
The method of the test gas drainage radius of the existing maturation such as method, gas flow method of testing.Actual mining is tested using conventional method
The erosion control effective release radius R2 of drilling in face 1, such as stress reduce the mature effective release of testing bore holes such as method, electromagnetic radiation method
The method of radius.The numerical values recited of R1 and R2 is compared in analysis, select 2 times of smaller value as two neighboring in stope 1
The spacing L1 of drilling.
(2) along stope 1 to the direction construction aperture perpendicular to tunnel 2 be 94mm or 113mm, 153mm etc. other
Concordant drilling 3, the spacing of wells L1 of major diameter, drilling are parallel to bearing, and drillable length is 1 width H of stope
2/3rds.By the concordant constructed drilling 3 successively marked as Kn, n=1,2,3 ....
(3) there is top brill, bit freezing, the initial and stop bit for inhaling phenomena such as brill and coal big gun in real-time record during drilling construction
It sets, the drilling region between two positions is that the actual stress of stope 1 concentrates band.
(4) expanded capsule 4 is sent into the initial position that actual stress concentrates band, is cased with communicating pipe 8 in expanded capsule 4.Benefit
The high pressure water for injecting 1-1.5MPa into expanded capsule 4 with water injection pipe 5 expands 4 water-filling of expanded capsule, to complete to drilling
First time block, 5 end of water injection pipe connect water pressure gauge 6.
(5) meet the drilling of Kn=3n-1 using label as water injecting drilling, using the company of extraction water injection pipe 7 and expanded capsule 4
Siphunculus 8 connects, and draws from drilling and connect with underground extraction main pipe 9, and extraction water injection pipe 7 is preferably steel pipe, this is because of extraction
Water injection pipe 7 should be able to bear the high pressure of water filling, can be used for gas drainage, can be used for high pressure water injection；With the drilling of other labels
As mash gas pumping drilling, it is all made of gas drainage pipe 11 and connects respectively with the communicating pipe 8 of expanded capsule 4 and underground extraction main pipe 9
It connects.Gas drainage pipe 11 is preferably polyethylene pipe.
(6) above step (2) to (5) are repeated, concordant of successively constructing in stope 1 drilling 3, until actual mining
All it is covered with drilling in face 1, coal seam is made to obtain abundant release and deformation.
(7) registration of each 5 end water pressure gauge 6 of pouring water into borehole pipe of observational record, when the water pressure gauge of some pouring water into borehole pipe 5
After 6 registration no longer changes, the region drilling orifice about 1m is blocked using polyurethane 12, and passes through grouting pump 13 and slip casting
Pipe 14 carries out injection hole sealing to the space in drilling between polyurethane 12 and expanded capsule 4 using cement mortar, while will drilling
The interior valve 10 for drawing drainage tube is opened, and carries out extraction to the gas in coal seam.
(8) when monitoring that extraction total amount reaches the 70% of the total gas bearing capacity in coal seam by gas monitoring system, extraction is infused
Water pipe 7 and gas drainage pipe 11 are disconnected with underground extraction main pipe 9, and extraction water injection pipe 7 is connect with high pressure water-injection pump 15,
High pressure water injection is carried out to coal seam by water injecting drilling, until when water injection hole neighbouring mash gas pumping drilling water outlet.
The improvement while present invention is able to achieve buried Bumping Pressure in Coal Layers and Gas Disaster determines the spacing of wells using reasonable
With drillable length, stope drilling release, the twice process procedures such as borehole sealing, gas drainage, water filling, efficiently realize
Concentrate the acquisition of band, the release in coal seam, the extraction of gas, coal-bed flooding reduction and depositing dust etc. multiple beneficial coal seam actual stress
Effect, realizes that a hole is multi-purpose, purpose of cost efficiency.Method of the invention is simple, easily operated, can make full use of drilling
Multiple efficacies, avoid in the prior art drilling construction exist repeatability and wasteness.
The above embodiment of the present invention is only preferred embodiment, is not limited to the scope of the present invention.Ability
The those of ordinary skill in domain can understand spirit of the invention according to above-described embodiment, and make a variety of different modifications and variations.?
Without departing from the spirit of the invention, it is all this etc. modifications and variations it is all within the scope of the present invention.
Claims (10)
1. a kind of multi-purpose construction method in a hole for administering buried Coal Seam and Gas Disaster, which is characterized in that including following step
It is rapid:
(1) determine spacing of wells L1: coal bed gas extraction effective radius R1 and the erosion control drilling of measurement stope (1) are effective
Release radius R2, the spacing L1 of two neighboring drilling is 2 times of smaller value in R1 and R2 in stope (1)；
(2) drilling construction: along stope (1), by the spacing of wells L1 to the direction construction concordant perpendicular to tunnel (2)
It drills (3), the length of drilling is 2/3rds of stope (1) width H；
(3) determine that actual stress concentrates band: there is the initial of bump generation omen in record in real time during drilling construction
Position and final position, the drilling region between the initial position and final position are the actual stresses of stope (1)
Concentrate band；
(4) borehole sealing and gas drainage: the drilling of the initial position of band is concentrated to block actual stress, indwelling in drilling
Communicating pipe (8), compartment of terrain selects drilling as water injecting drilling later, using extraction water injection pipe (7) respectively with communicating pipe (8) and well
Lower extraction main pipe (9) connection, carries out gas drainage；Other drillings are used as mash gas pumping drilling, using gas drainage pipe (11) point
It is not connect with communicating pipe (8) and underground extraction main pipe (9), carries out gas drainage；
(5) the abundant release in coal seam: repeating step (2) to (4), the successively construction in stope (1), until stope
(1) it is covered with concordant drilling (3) in；
(6) high pressure water injection: when measuring gas drainage total amount and reaching the 65%-80% of the total gas bearing capacity in coal seam, by extraction water injection pipe
(7) it is disconnected with gas drainage pipe (11) with underground extraction main pipe (9), and by extraction water injection pipe (7) and high pressure water-injection pump
(15) it connects, high pressure water injection is carried out to coal seam by water injecting drilling, until the gas drainage pipe (11) of neighbouring mash gas pumping drilling
Until interior water outlet.
2. a hole multi-purpose construction method according to claim 1 for administering buried Coal Seam and Gas Disaster, feature
It is, in step (2), the aperture of drilling is 94mm, 113mm, 133mm or 153mm.
3. a hole multi-purpose construction method according to claim 1 for administering buried Coal Seam and Gas Disaster, feature
It is, the bump occurs omen and is top brill, bit freezing, inhales brill or coal big gun.
4. a hole multi-purpose construction method according to claim 1 for administering buried Coal Seam and Gas Disaster, feature
It is, it is described to block to block for the first time in step (4), expanded capsule (4) are sent into the drilling to be blocked, the expansion glue
Capsule (4) cover communicating pipe (8) outside, using water injection pipe (5) to high pressure water is injected in expanded capsule (4), make expanded capsule (4) water-filling
Drilling is blocked in expansion, and water injection pipe (5) end connects water pressure gauge (6)；And carry out second after step (5) and block, observation note
The pressure gauge registration for recording each pouring water into borehole pipe (5) end, after some pouring water into borehole pipe (5) pressure gauge registration no longer changes,
Drilling orifice region is blocked using sealing compound, injection hole sealing is carried out to bore inner using hole sealing agent later.
5. a hole multi-purpose construction method according to claim 4 for administering buried Coal Seam and Gas Disaster, feature
It is, the drilling orifice region refers to the region 1m in aperture.
6. a hole multi-purpose construction method according to claim 4 for administering buried Coal Seam and Gas Disaster, feature
It is, the pressure of the high pressure water is 1-1.5MPa.
7. a hole multi-purpose construction method according to claim 4 for administering buried Coal Seam and Gas Disaster, feature
It is, sealing compound is polyurethane, and hole sealing agent is cement mortar.
8. a hole multi-purpose construction method according to claim 1 for administering buried Coal Seam and Gas Disaster, feature
It is, in step (4), compartment of terrain, which selects drilling as water injecting drilling, is implemented as got off: the concordant constructed is drilled (3)
Successively marked as Kn, n=1,2,3 ..., label is selected to meet the drilling of Kn=3n-1 as water injecting drilling.
9. a hole multi-purpose construction method according to claim 1 for administering buried Coal Seam and Gas Disaster, feature
Be, in step (6), when measuring gas drainage total amount and reaching the 70% of the total gas bearing capacity in coal seam, by extraction water injection pipe (7) and
Gas drainage pipe (11) is disconnected with underground extraction main pipe (9).
10. a hole multi-purpose construction according to any one of claim 1 to 9 for administering buried Coal Seam and Gas Disaster
Method, which is characterized in that the buried coal seam is that buried depth is greater than 600m and presses and Gas Disaster with having potential impact simultaneously
Coal seam.
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| CN115355004B (en) * | 2022-09-20 | 2024-03-19 | 山东理工大学 | Modification and reinforcement pressure relief method for red mud slurry for rock burst drilling of coal seam |
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