CN108590737A - A kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant - Google Patents
A kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant Download PDFInfo
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- CN108590737A CN108590737A CN201810255702.2A CN201810255702A CN108590737A CN 108590737 A CN108590737 A CN 108590737A CN 201810255702 A CN201810255702 A CN 201810255702A CN 108590737 A CN108590737 A CN 108590737A
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- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 91
- 239000003245 coal Substances 0.000 claims abstract description 90
- 238000005553 drilling Methods 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 47
- 239000007924 injection Substances 0.000 claims abstract description 47
- 239000002360 explosive Substances 0.000 claims abstract description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 16
- 239000001257 hydrogen Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 16
- 238000005474 detonation Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000004880 explosion Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/06—Fluids used for spraying
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/14—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by compressed air; by gas blast; by gasifying liquids
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- Life Sciences & Earth Sciences (AREA)
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- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention proposes a kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant, includes the following steps：Step 1: coal body mechanical property measures；Step 2: determining the highest gas injection pressure of high pressure gas gas injection；Step 3: coal body drills；Step 4: Uncoincided charge；Step 5: reserved pressure duct in drilling；Step 6: drilling and sealing；Step 7: high pressure gas gas injection；Step 8: ignition charge presplitting is anti-reflection；Step 9: note retardant.Beneficial effects of the present invention：It is construction safety, reliable, reasonable Arrangement drills in waiting for working seam, inject high pressure gas (mixed gas of hydrogen and air), realize hydrogen and explosive detonation collaboration, the porosity for waiting for working seam is significantly greatly increased, presplitting is anti-reflection radius is big, effect is good, so that the radius of hypotonicity spontaneous fire seam injecting retarder is increased, the injection effect of hypotonicity spontaneous fire seam retardant is greatly improved.
Description
Technical field
The present invention relates to coal seam preventing and extinguishing fire technology fields, more particularly to a kind of hypotonicity spontaneous fire seam retardant height
Imitate method for implanting.
Background technology
Coal still occupies very important status in China's energy consumption structure, 2016, and consumption of coal proportion is
62.6%, it is contemplated that 2017 about 60% or so.Fire caused by spontaneous combustion of coal seam is one of the major casualty in coal production.Coal
Layer spontaneous combustion not only will produce a large amount of toxic and harmful gas, induces gas explosion and coal-dust explosion threatens staff's life security,
A large amount of coal resources and equipment are also burnt and freezed, huge loss is caused.Recent statistics show that there is spontaneous fire danger in China
The mine of danger accounts for about the 56% of mine sum.China's rapid economic development in recent years, the demand to the energy are increasing.This side
Face has pushed coal mine high-yield and high-efficiency to develop, and on the other hand as mining rate increases, especially mining technology is universal
Applied to high seam, spontaneous combustion of coal seam accident occurs that ascendant trend is presented.People analyze coal seam by the research to coal spontaneous combustion mechanism
The rule of spontaneous fire has made a series of measure of preventing spontaneous combustion of coal, including presses leak stopping, slip casting, note retardant, note
Noble gas, gel-filled and foamed material etc., wherein note retardant is to prevent the most effective measure of spontaneous combustion of coal seam.China coal seam is commonly
Low-permeability coal seam, compared to foreign countries, China's coal seam permeability generally wants the small 2-3 order of magnitude, hypotonicity to cause China and permitted
More coal mine rock burst accidents, coal and gas prominent Frequent Accidents, at the same easily natural mine due to coal seam permeability it is relatively low, cause
Coal seam fire extinguishing is difficult, these problems all seriously hinder the exploitation of China's coal-mine highly effective and safe.Coal mine low-permeability coal seam is also referred to as
It is needed to hypotonicity easily certainly for low air permeability coal seam to ensure the exploitation of low air permeability coal seam high-efficiency intensifying and safety in production
The coal-fired efficient method for implanting of layer retardant is studied.
Currently, the anti-reflection measure of low air permeability coal seam presplitting mainly include deep hole standing shot, hydrofracturing, hydraulic flushing in hole,
The methods of Mining Protective Seam, hydraulic slotted liner technique.Wherein deep hole standing shot to drill neighbouring coal seam fried it is very broken, but to from
The slightly remote local presplitting effect of drilling declines rapidly, and presplitting radius is smaller, and effect is bad；Additionally, due to the induced detonation of coal mining explosive
Distance is smaller, and to prevent from miss-firing, site operation needs primacord to be coupled, therefore, site operation trouble；Besides explosive presplitting,
It is possible that cause the region gas explosion be connected by crack, it is dangerous.If hydraulic fracturing hydraulic pressure is small, crack expansion is limited, in advance
It is bad to split effect；If hydraulic pressure is big, high pressure water can be flowed out from larger crack, and presplitting is uneven, and effect is bad；And high pressure water exists
Flowing in coal seam is uncontrollable.Hydraulic flushing in hole is drilled by sluicing, wash boring hole wall while expanding bore diameter
Coal dust, so that the wall of a borehole is had better permeability, due to this method for improve gas permeability of coal seam effect it is very small, at present substantially not
It uses again.Mining Protective Seam often closes on liberation layer thickness very little due to the limitation of condition of coal seam occurrence, it is difficult to it exploits, or
Coal quality is poor, does not close on Protective Coal Seam without extraction value or even many coal seams so that the technology can not use.Hydraulic slotted liner technique
It is limited by equipment so that the implementing process of this technology is complicated, it is difficult to promote and apply at the scene.
Invention content
The purpose of the present invention is to provide a kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant, solve current
The hypotonicity spontaneous fire seam retardant injection technical problem that radius is small and effect is poor.
The present invention provides a kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant, includes the following steps：
Step 1: coal body mechanical property measures
Coal sample is taken in waiting for working seam, measures the compression strength of coal body, and determination waits for working seam close to track crossheading, glue
The crisp band depth of band crossheading position coal body pressure；
Step 2: determining the highest gas injection pressure of high pressure gas gas injection
By the compression strength of coal body divided by the 1.5 highest gas injection pressure as follow-up high pressure gas gas injection；
Step 3: coal body drills
Respectively along track crossheading, adhesive tape crossheading extending direction to waiting for equidistant horizontal drilling in working seam, drilling
Depth is 0.3 times of coal working face length, and the vertical height of drilling is 0.5 times of coal working face height；
Step 4: Uncoincided charge
Explosive is packed into drilling using Uncoincided charge mode；
Step 5: reserved pressure duct in drilling
Reserved pressure duct in drilling, pressure duct is located at 0.5 to 0.6 times that the length in drilling is drilling depth, high
Drilling is stretched out in the end on pressure pipe road；
Step 6: drilling and sealing
By drilling and sealing, using cement material sealing of hole, the length of cementing is 0.2 to 0.3 times of drilling depth, cement
The length of sealing of hole is greater than the crisp band depth of coal body pressure；
Step 7: high pressure gas gas injection
High pressure gas is injected into drilling by pressure duct, the pressure for injecting high pressure gas is gradually increased to highest gas injection
Pressure is simultaneously kept, and highest gas injection pressure by being determined in step 2, after obviously becoming smaller and stablize still protect by injection high-pressure gas flow
It holds highest gas injection pressure several hours, high pressure gas is the mixed gas of hydrogen and air, the volume point of hydrogen in mixed gas
Number is 28.6%；
Step 8: ignition charge presplitting is anti-reflection
It is kept in the time of highest gas injection pressure in injection high pressure gas, ignites the explosive in drilling, coal seam carried out pre-
It splits anti-reflection；
Step 9: note retardant
Pressure duct is connected into note retardant pipeline, to waiting for working seam injecting retarder.
Further, in step 3, the level interval of adjacent drilling is 20m, the drilling nearest apart from coal working face away from
It is 10m, bore diameter 96mm from coal working face.
Further, in step 4, the loaded length of explosive is 0.5 to 0.7 times of drillable length.
Further, in step 5, it is 0.5m to 1m that the length of drilling is stretched out in the end of pressure duct.
Further, in step 6, the ratio of cement and water is 1 in cement material:0.2 to 1:0.5.
Further, in step 7, injection high-pressure gas flow still keeps highest gas injection pressure after obviously becoming smaller and stablize
6 hours of power.
Compared with prior art, the efficient method for implanting of hypotonicity spontaneous fire seam retardant of the invention and with following
Features and advantages：
The efficient method for implanting of hypotonicity spontaneous fire seam retardant of the present invention, it is construction safety, reliable, waiting for mine coal
Reasonable Arrangement drills in layer, injection high pressure gas (mixed gas of hydrogen and air), realizes hydrogen and explosive detonation collaboration, pole
Big to increase the porosity for waiting for working seam, presplitting is anti-reflection radius is big, effect is good, makes hypotonicity spontaneous fire seam injecting retarder
Radius increase, the injection effect of hypotonicity spontaneous fire seam retardant is greatly improved.
After the specific implementation mode of the present invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the flow chart of the efficient method for implanting of hypotonicity spontaneous fire seam retardant of the embodiment of the present invention；
Fig. 2 is the borehole pattern of the efficient method for implanting of hypotonicity spontaneous fire seam retardant of the embodiment of the present invention；
Wherein, 1, coal working face, 2, track crossheading, 3, adhesive tape crossheading, 4, wait for working seam, 5, drilling.
Specific implementation mode
As shown in Figure 1 and Figure 2, the present embodiment provides a kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant, packets
It includes
Following steps：
Step 1: coal body mechanical property measures
Coal sample is taken in waiting for working seam 4, measures the compression strength of coal body, determination waits for working seam 4 close to track crossheading
2, the 3 crisp band depth of position coal body pressure of adhesive tape crossheading.
Step 2: determining the highest gas injection pressure of high pressure gas gas injection
By the compression strength of coal body divided by the 1.5 highest gas injection pressure as follow-up high pressure gas gas injection.
Step 3: coal body drills
Respectively along track crossheading 2, adhesive tape crossheading 3 extending direction to waiting for equidistant horizontal drilling in working seam 4, drill
5 depth is 0.3 times of 1 length of coal working face, and 5 vertical height of drilling is 0.5 times of 1 height of coal working face.It is adjacent
The level interval of drilling 5 is 20m, and the drilling 5 nearest apart from coal working face 1 is 10m, bore diameter apart from coal working face 1
For 96mm.
Step 4: Uncoincided charge
Explosive is packed into drilling 5 using Uncoincided charge mode, the loaded length of explosive be 5 length of drilling 0.5 to
0.7 times.
Step 5: reserving pressure duct in drilling 5
Pressure duct is reserved in drilling 5, pressure duct is located at 0.5 to 0.6 times that the length in drilling 5 is 5 depth of drilling,
Drilling 5 is stretched out in the end of pressure duct, and it is 0.5m to 1m that the length of drilling 5 is stretched out in the end of pressure duct.
Step 6: 5 sealing of holes of drilling
To drill 5 sealing of holes, and using cement material sealing of hole, the ratio of cement and water is 1 in cement material:0.2 to 1:0.5.
The length of cementing is 0.2 to 0.3 times of 5 depth of drilling, and the length of cementing is greater than the crisp band depth of coal body pressure.
Step 7: high pressure gas gas injection
High pressure gas is injected into drilling 5 by pressure duct, the pressure for injecting high pressure gas is gradually increased to highest note
Atmospheric pressure is simultaneously kept, and highest gas injection pressure is injected after high-pressure gas flow obviously becomes smaller and stablizes still by being determined in step 2
It is kept for 6 hours of highest gas injection pressure, high pressure gas is the mixed gas of hydrogen and air, the volume point of hydrogen in mixed gas
Number is 28.6%.
Step 8: ignition charge presplitting is anti-reflection
It is kept in the time of highest gas injection pressure in injection high pressure gas, ignites the explosive in drilling 5, coal seam carried out pre-
It splits anti-reflection.
Step 9: note retardant
Pressure duct is connected into note retardant pipeline, to waiting for 4 injecting retarder of working seam.
The efficient method for implanting of hypotonicity spontaneous fire seam retardant of the present embodiment waits for working seam 4 by increasing
Crack, rimala, hole, micropore, semiclosed hole increase the injection rate of retardant, extend the spontaneous fire period, and increase waits for
The gas permeability of working seam 4 is that the present embodiment is successfully crucial, effect of the high pressure gas in drilling and high pressure hydrogen and fried
In terms of medicine detonation cooperates with anti-reflection principle to be embodied in following six.
First, after in high pressure hydrogen injection hole 5, high pressure hydrogen enter wait for crack in working seam 4, rimala, hole,
Expansion work while micropore, semiclosed hole so that rimala expands unicom into larger crack, while hole, micropore,
Semiclosed hole extension becomes crack and larger hole so that the mutually unicom such as initial fissure, regeneration crack, hole forms ventilative
Property network, improve and wait for the gas permeability of working seam 4.
Second is that in the gas permeability networks that mutually unicom is formed such as initial fissure, regeneration crack, hole, high pressure hydrogen changes
The occurrence status (adsorption/desorption) for waiting for methane in working seam 4 makes first of dissociating in drilling, initial fissure, regeneration crack, hole
The amount of alkane becomes smaller, and then makes to wait for that the methane concentration in working seam is less than its explosion limit, improves safety.
Third, after injection high-pressure gas flow obviously becomes smaller and stablizes relatively in drilling 5, it is 6 small persistently to inject high pressure gas
When so that high pressure gas by hydrostatic pressure, can preferably act on the cracks in coal seam of unicom and non-unicom, hole, micropore,
Semiclosed hole makes cracks in coal seam, hole net unicom network further develop, and improves the gas permeability for waiting for working seam 4.
Fourth, since charging means are Uncoincided charge, the detonation wave that explosive charge generates makes to form radial split inside coal seam
Gap, high pressure gas and quick-fried raw high pressure gas in drilling 5 penetrate into Radial crack, play gas wedging action, increase crack front end coal body
Interior tensile stress can make to wait for that the crack in working seam 4, hole unicom network are further developed, and raising waits for working seam 4
Gas permeability.
Fifth, it is logical to have high pressure gas when explosive charge, in a large amount of quick-fried raw high pressure gas that explosion initial stage generates, with drilling 5
Hydrostatic pressure is crossed in waiting for the cracks in coal seam of unicom and non-unicom in working seam 4, hole, micropore, semiclosed hole, makes coal seam
Crack, hole net unicom network further develop, and improve the gas permeability for waiting for working seam 4.
Sixth, in drilling 5 after explosive initiation, the high temperature and pressure of generation can ignite the height of volume fraction 28.6% in drilling 5
Pressure hydrogen explodes jointly, strengthens explosion and acts on the crack of drilling and its periphery unicom, the extension of pore network, improves and wait exploiting
The gas permeability in coal seam 4.
By principles above process, the porosity for waiting for working seam 4 can be greatly increased, is conducive to the easy spontaneous combustion of hypotonicity
The efficient injection of coal seam retardant.
The efficient method for implanting of hypotonicity spontaneous fire seam retardant of the present embodiment, it is construction safety, reliable, it is waiting exploiting
Reasonable Arrangement drilling 5 in coal seam 4, is cooperateed with, greatly by the detonation of effect and hydrogen and explosive of the high pressure gas in drilling
Increase the porosity for waiting for working seam, presplitting is anti-reflection, and radius is obviously improved, about 15 to 20 meters, and the most common explosive of coal mine is deep
Hole standing, presplitting is anti-reflection, and the radius of influence is relatively small, about 3 to 5 meters.It is loosened using the most common explosive deep hole of coal mine
Explosion will encrypt drilling 5 to reach identical antireflective effect, sometimes for the preferable antireflective effect of acquisition, it is also necessary to implement
A large amount of control drilling, it is meant that the increase of labor intensity and the reduction of efficiency, while rendrock dosage is also increased,
Mean less efficient.The efficient method for implanting of hypotonicity spontaneous fire seam retardant of the present embodiment, it is two neighboring for certain
Working face carries out coal seam note retardant Na2CO3The investigation of effect afterwards, one adopts face and uses the common method for implanting of retardant, another
Adopt face use the present embodiment the efficient method for implanting of hypotonicity spontaneous fire seam retardant, to away from working face 10m, 20m,
The observation drilling that 6 to 8m diameters 42mm are made a call in the coal seam of 40m, 60m, 80m, 100m, surveys bore inner temperature, is averaged, and
It is compared with the temperature in the preceding coal seam of note retardant, to obtain resistanceization effect, compares the injection effect of two kinds of note retardant methods
Fruit.
1 fully-mechanized mining working retardant of table injects Contrast on effect
From table 1 it follows that each measuring point temperature is substantially reduced in coal body after injecting retarder, it is easy using hypotonicity
The efficient method for implanting cooling extent of spontaneous progress retardant averagely reaches 8 DEG C, and comparison hypotonicity spontaneous fire seam retardant is general
Logical method for implanting is higher by 160% cooling extent, and by coal body resistanceization experimental data, coal temperature is averaged amount of increase 0.25 after resistanceization
DEG C/d, it can be calculated to can reach after 32 day time using the efficient method for implanting of hypotonicity spontaneous fire seam retardant and do not note resistanceization
The maximum temperature of agent, method for implanting more common than use hypotonicity spontaneous fire seam retardant can extend 20 day time, prolong significantly
The spontaneous fire period is grown.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention should also belong to the present invention's
Protection domain.
Claims (6)
1. a kind of efficient method for implanting of hypotonicity spontaneous fire seam retardant, which is characterized in that include the following steps：
Step 1: coal body mechanical property measures
Coal sample is taken in waiting for working seam, measures the compression strength of coal body, and determination waits for that working seam is suitable close to track crossheading, adhesive tape
The crisp band depth of groove location coal body pressure；
Step 2: determining the highest gas injection pressure of high pressure gas gas injection
By the compression strength of coal body divided by the 1.5 highest gas injection pressure as follow-up high pressure gas gas injection；
Step 3: coal body drills
Respectively along track crossheading, adhesive tape crossheading extending direction to waiting for equidistant horizontal drilling in working seam, the depth of drilling
It it is 0.3 times of coal working face length, the vertical height of drilling is 0.5 times of coal working face height；
Step 4: Uncoincided charge
Explosive is packed into drilling using Uncoincided charge mode；
Step 5: reserved pressure duct in drilling
Reserved pressure duct in drilling, pressure duct are located at 0.5 to 0.6 times that the length in drilling is drilling depth, high-voltage tube
Drilling is stretched out in the end on road；
Step 6: drilling and sealing
By drilling and sealing, using cement material sealing of hole, the length of cementing is 0.2 to 0.3 times of drilling depth, cementing
Length be greater than the crisp band depth of coal body pressure；
Step 7: high pressure gas gas injection
High pressure gas is injected into drilling by pressure duct, the pressure for injecting high pressure gas is gradually increased to highest gas injection pressure
And keep, by being determined in step 2, injection high-pressure gas flow is still kept most highest gas injection pressure after obviously becoming smaller and stablize
High gas injection pressure several hours, high pressure gas are the mixed gas of hydrogen and air, and the volume fraction of hydrogen is in mixed gas
28.6%；
Step 8: ignition charge presplitting is anti-reflection
It is kept in the time of highest gas injection pressure in injection high pressure gas, ignites the explosive in drilling, presplitting increasing is carried out to coal seam
Thoroughly；
Step 9: note retardant
Pressure duct is connected into note retardant pipeline, to waiting for working seam injecting retarder.
2. the efficient method for implanting of hypotonicity spontaneous fire seam retardant according to claim 1, it is characterised in that：Step
In three, the level interval of adjacent drilling is 20m, and the hole spacing coal working face nearest apart from coal working face is 10m, drilling
A diameter of 96mm.
3. the efficient method for implanting of hypotonicity spontaneous fire seam retardant according to claim 1, it is characterised in that：Step
In four, the loaded length of explosive is 0.5 to 0.7 times of drillable length.
4. the efficient method for implanting of hypotonicity spontaneous fire seam retardant according to claim 1, it is characterised in that：Step
In five, it is 0.5m to 1m that the length of drilling is stretched out in the end of pressure duct.
5. the efficient method for implanting of hypotonicity spontaneous fire seam retardant according to claim 1, it is characterised in that：Step
In six, the ratio of cement and water is 1 in cement material:0.2 to 1:0.5.
6. the efficient method for implanting of hypotonicity spontaneous fire seam retardant according to claim 1, it is characterised in that：Step
In seven, injection high-pressure gas flow still keeps 6 hours of highest gas injection pressure after obviously becoming smaller and stablize.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184147A1 (en) * | 2018-03-27 | 2019-10-03 | 山东科技大学 | Method for efficiently preventing impact ground pressure for low gas-permeability coal seam |
| CN116696306A (en) * | 2023-08-07 | 2023-09-05 | 中石油深圳新能源研究院有限公司 | Composite fluid fracturing device for constructing hot dry rock thermal storage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644156A (en) * | 2009-07-17 | 2010-02-10 | 中国矿业大学 | Method for weakening coal-rock mass by hydraulic blasting and fracturing |
| CN101880209A (en) * | 2010-06-24 | 2010-11-10 | 杜志刚 | High-efficiency pollution-free gas explosive tube |
-
2018
- 2018-03-27 CN CN201810255702.2A patent/CN108590737A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644156A (en) * | 2009-07-17 | 2010-02-10 | 中国矿业大学 | Method for weakening coal-rock mass by hydraulic blasting and fracturing |
| CN101880209A (en) * | 2010-06-24 | 2010-11-10 | 杜志刚 | High-efficiency pollution-free gas explosive tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184147A1 (en) * | 2018-03-27 | 2019-10-03 | 山东科技大学 | Method for efficiently preventing impact ground pressure for low gas-permeability coal seam |
| CN116696306A (en) * | 2023-08-07 | 2023-09-05 | 中石油深圳新能源研究院有限公司 | Composite fluid fracturing device for constructing hot dry rock thermal storage |
| CN116696306B (en) * | 2023-08-07 | 2023-10-20 | 中石油深圳新能源研究院有限公司 | Composite fluid fracturing device for constructing hot dry rock thermal storage |
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Application publication date: 20180928 |