CN107060870A - A kind of goaf retardant efficiently sprays scheme - Google Patents
A kind of goaf retardant efficiently sprays scheme Download PDFInfo
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- CN107060870A CN107060870A CN201710269888.2A CN201710269888A CN107060870A CN 107060870 A CN107060870 A CN 107060870A CN 201710269888 A CN201710269888 A CN 201710269888A CN 107060870 A CN107060870 A CN 107060870A
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- Prior art keywords
- goaf
- retardant
- resistanceization
- coal
- nitrogen
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- 239000007921 spray Substances 0.000 title claims description 16
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 50
- 239000003245 coal Substances 0.000 claims description 43
- 229910052757 nitrogen Inorganic materials 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000443 aerosol Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 230000005764 inhibitory process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims description 2
- 238000009688 liquid atomisation Methods 0.000 claims description 2
- 201000010041 presbyopia Diseases 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000004913 activation Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 208000021017 Weight Gain Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002113 chemopreventative effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Catching Or Destruction (AREA)
Abstract
Scheme is efficiently sprayed the invention discloses a kind of goaf retardant, it is characterised in that set up the efficient sprinkling system of goaf retardant, the system is made up of 2 parts：Return airway sets a portable resistanceization pumping plant and goaf deep to carry out the secondary sprinkling of retardant, is administered available for colliery spontaneous combustion.
Description
Technical field
The present invention relates to mining safety, more particularly to colliery spontaneous combustion is administered.
Background technology
Mine fire is one of major casualty of direct threat mine safety production.China's coal-mine natural conditions are complicated, tool
Have that the dangerous colliery proportion of spontaneous fire is big, broad covered area, spontaneous fire phenomenon is serious.Fire occurs for spontaneous combustionof coal, gently
Then influence production, heavy then may burn coal resources and pit gear, in some instances it may even be possible to cause gas and dust explosion or fire cigarette to poison
Mine, greatly loss and harm are caused to Coal mine production and safety.According to statistics, China with the presence of 56% colliery spontaneous fire
Problem, accounts for more than the 90% of total mine fire, has a strong impact on and threaten the safety in production in colliery.
The gentle fogbound agent of nitrogen injects goaf together, can reduce goaf oxygen concentration, reduces oxidized zone scope, drop
The oxidation rate of low goaf float coal, reduces the heat that float coal oxidation is produced, extends spontaneous combustion period, so as to reach prevention and control
Manage the purpose of spontaneous combustion in goaf.The danger and possibility of goaf gas blast can also actually be reduced.
Even if but it was verified that employing the gentle fogbound agent sprinkling preventing and extinguishing fire technology of nitrogen, spontaneous combustion in goaf
Do not controlled completely, its fire extinguishing effect is also not quite similar when different mines use the technology.Reason be nitrogen and
Aerosol retardant fire extinguishing is a complicated system engineering, to choose different nitrogen-making devices, note nitrogen according to the condition of mine
Mode and technical parameter.Aerosol retardant shows to bond and evaporation characteristic during diffusion And Movement simultaneously, causes actual biography
Scope is broadcast not know.Therefore, the simulation gentle fogbound agent of nitrogen is in the flow field in goaf, and nitrogen is gentle under each flow of com-parison and analysis
The inerting of fogbound agent and cooling-down effect draw optimum flow, optimization note nitrogen technique, to reach optimal fire extinguishing effect, to existing
Field fire extinguishing work has realistic meaning.
The content of the invention
1. a kind of goaf retardant efficiently sprays scheme, it is characterised in that set up goaf retardant and efficiently spray and be
System, the system is made up of 2 parts：Return airway sets a portable resistanceization pumping plant and goaf deep to carry out the secondary spray of retardant
Spill, administered available for colliery spontaneous combustion.
2. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that return airway is set
One portable resistanceization pumping plant, including liquid reserve tank, resistanceization pump, filter, pressure gauge etc., working face lays special high-pressure sebific duct one
Time, efficient one group of shower nozzle is installed at each hydraulic support rear portion, and nozzle is to goaf；The first of Residual coal in goaf can be achieved in the part
Sprinkling comprehensively, sprinkling step pitch is that working face one promotes circulation.
3. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that mined out to solve
Spontaneous combustion hidden danger caused by the reduction of coal resistanceization effect is lost in area deep, need to carry out the secondary sprinkling of retardant to goaf deep；Due to adopting
The dead zone blast that leaks out is smaller, it is difficult to be used as the efficient delivery vehicles of steam fog retardant, it is considered to which delivery vehicles should not be to spontaneous combustion of remaining coal
Play catalytic action, final choice high-pressure inert gas N2；Therefore, Yi is installed in No. 8 coal track connection roadways and moves Dan Ji Group processed,
Ф 70mm nitrogen feeding pipes road is laid to air intake lane until embedment goaf；Meanwhile, air intake lane sets a portable resistanceization pumping plant, resistanceization
Prepared by liquid include liquid reserve tank, resistanceization pump, filter etc., and pipe-line system includes high-pressure rubber pipe, high-pressure ball valve and joint, atomised part
It is made up of atomizer, 50~200 μm of atomized drop scope；Nitrogen feeding pipe road is installed every 60m and carries manometric reducing three links: link of trade, travel and post,
Three links: link of trade, travel and post are less than 30 ° with nitrogen feeding pipe road angle, and are tightly connected with resistanceization liquid atomization device；N2 is released with steam fog retardant in goaf
Put mouth and be higher than 1~2m of bottom plate by upward 45 ° of inclination angles, and Φ 5mm presbyopia is arranged in liberation port pipeline, so that steam fog retardant is suitable
Smooth discharge.
4. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that using note nitrogen with
The gentle fogbound agents of N2 are transported in the oxidized zone of work face goaf by gas injection fogbound agent integration preventing and extinguishing fire technology together,
N2, retardant play a part of preventing spontaneous combustion of remaining coal simultaneously, and dual fail-safe can be achieved.
5. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that aerosol hinders chemoprevention
Fiery system includes atomization pumping plant, pipe-line system and the part of atomizer 3.Atomization pumping plant is provided with:Liquid reserve tank, filter, resistanceization liquid pump,
Electric switch etc..Pipe-line system is made up of high-voltage tube, high-pressure ball valve and joint.2101 lanes beyond 4101 working face terminal lines
An aerosol resistanceization chamber is dug, 2 aerosol resistanceization pumps (1 make 1 standby) are installed, 1 resistanceization liquid pump case and controller switching equipment are connected and conveyed
Resistanceization liquid pipeline, atomizer, and atomizer is sealed in 2101 lanes note nitrogen bye-pass away from the nearest three links: link of trade, travel and post of working face.
6. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that injecting nitrogen system
System is made up of nitrogen pumping plant processed, pipe-line system etc..On note nitrogen bye-pass, " three of 1 angle less than 45 ° are set at interval of 100m
It is logical ", for connecting retardant atomizer, and by wherein 1 standby port guard seal.Applying aerosol ignition inhibition for fire prevention skill
During art, retardant is configured to mixed type resistanceization liquid, installation reducing " three on main transfer pipeline is in away from face end 50m
It is logical " the connection long high-pressure rubber pipes of Φ 16 of 1 60~80m and high pressure valve, after the completion of debugging efforts, atomizer is arranged on Φ 16 high
Moulding pipe line end, it is after high-pressure rubber pipe one end is connected with atomizer, atomizer is nearest away from working face in nitrogen pipeline with noting
Three links: link of trade, travel and post be tightly connected.
Brief description of the drawings
Fig. 1 8# raw coal samples
Fig. 2 8#1%cacl2
Fig. 3 8#1%mgcl2
Fig. 4 8#4%cacl2
Fig. 5 8#4%mgcl2
Fig. 6 11# raw coal samples
Fig. 7 11#1%cacl2
Fig. 8 11#1%mgcl2
Fig. 9 11#4%cacl2
Figure 10 11#4%mgcl2
Embodiment
Working face overview
Certain working face of ore deposit 3108 adopts No. 9 coals and puts No. 8 coal fully mechanized mining low caving coal mining types, the average thickness in No. 8 coal seams
Spend 4.85m, No. 9 coal seam average thickness 3.49m, 2~11 ° of seam inclination, interlamellar spacing 1m or so.Working face, which can be adopted, moves towards length
1141m, adopts the long 206m in face.Arranged using double lanes, adhesive tape lane, track lane are arranged in No. 9 coal seams, rectangular cross section, clear span
4.2m, clear height 3m, using the U-shaped draft type of track lane air intake, adhesive tape lane return air.No. 8 coal seams are identified as the easy spontaneous combustion of II class
Coal seam, No. 9 coal seams are III class not spontaneous fire seam.No. 9 coal seam recovery ratios are high in recovery process, and the contact O2 times are short, cause certainly
Fire possibility small；No. 8 top coal sulfur-bearings are higher, in top coal caving, the frame of working face head 3, the frame of tail 2 not Sub-Level Caving, No. 8 coals
Accumulated after being caving in broken state in goaf, easily trigger spontaneous fire.Through goaf gas-sample analysis, CO volume fractions
Up to 0.057%, illustrate that losing coal comes into the low-temperature oxidation stage.
Experimental condition
No. 8, No. 9 coal seam samples are gathered in 3108 working faces, coal sample is ground to form below the mesh of granularity 50, indicates and adopts on label
The place of sample and time, sealing preserve；Retardant and water are sufficiently mixed and are configured to mass fraction 1%, 4% MgCl2 and
CaCl2 retardant solution；Then the experiment coal sample after addition retardant is made in retardant solution and 8, No. 9 coal samples, in electric heating
24h is dried in vacuum drying chamber, sealing preserve is put into standby in glass desicator.
Coal sample oxidizing fire thermogravimetric analysis experiment is carried out on comprehensive thermogravimetric analyzer,.Coal sample quality 15mg, reacting gas
For O2 and N2, flow is respectively 10 and 40mL/min, and oxidizing fire occurs in atmosphere for 5 DEG C/min of heating rate, simulation coal
Condition, untill 25 DEG C rise to 800 DEG C of coal sample constant weights.Obtain TG (mass change) curve.
Test result analysis
Using uble-outerplanar graph, it is determined that being adapted to solve experiment coal sample oxidation weight gain stage ignition activation energy reaction mechanism function.
Obtain testing the ignition activation energy that coal sample is not added after retardant and addition retardant, it is as shown in the table.
The resistance effect of retardant is judged according to ignition activation energy method, that is, adds the ignition activation energy of coal after retardant
Value is higher, illustrates that the difficulty of coal generation oxidation and spontaneous combustion is bigger.The ignition activation energy for adding coal sample after retardant is generally improved, due to
Add the increased maximum of coal sample ignition activation energy of 4%mgcl2 retardants, therefore selection 4%mgcl2 retardants.
Claims (6)
- , should 1. a kind of goaf retardant efficiently sprays scheme, it is characterised in that set up the efficient sprinkling system of goaf retardant System is made up of 2 parts：Return airway sets a portable resistanceization pumping plant and goaf deep to carry out the secondary sprinkling of retardant, can use Administered in colliery spontaneous combustion.
- 2. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that return airway sets one to move Dynamic formula resistanceization pumping plant, including liquid reserve tank, resistanceization pump, filter, pressure gauge etc., working face lays special high-pressure sebific duct one time, often Efficient one group of shower nozzle is installed at individual hydraulic support rear portion, and nozzle is to goaf；The first comprehensive of Residual coal in goaf can be achieved in the part Sprinkling, sprinkling step pitch is that working face one promotes circulation.
- 3. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that deep to solve goaf Spontaneous combustion hidden danger caused by the reduction of coal resistanceization effect is lost in portion, need to carry out the secondary sprinkling of retardant to goaf deep；Due to goaf The blast that leaks out is smaller, it is difficult to be used as the efficient delivery vehicles of steam fog retardant, it is considered to which delivery vehicles should not rise to spontaneous combustion of remaining coal and urge Change is acted on, final choice high-pressure inert gas N2；Therefore, Yi is installed in No. 8 coal track connection roadways and moves Dan Ji Group, Ф 70mm processed Nitrogen feeding pipe road is laid to air intake lane until embedment goaf；Meanwhile, air intake lane sets a portable resistanceization pumping plant, prepared by resistanceization liquid Including liquid reserve tank, resistanceization pump, filter etc., pipe-line system includes high-pressure rubber pipe, high-pressure ball valve and joint, and atomised part is by being atomized Device is constituted, 50~200 μm of atomized drop scope；Installed every 60m and carry manometric reducing three links: link of trade, travel and post, three links: link of trade, travel and post in nitrogen feeding pipe road It is less than 30 ° with nitrogen feeding pipe road angle, and is tightly connected with resistanceization liquid atomization device；N2 is pressed with steam fog retardant liberation port in goaf Upward 45 ° of inclination angles are higher than 1~2m of bottom plate, and arrange Φ 5mm presbyopia in liberation port pipeline, in favor of the smooth row of steam fog retardant Go out.
- 4. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that using note nitrogen and gas injection The gentle fogbound agents of N2 are transported in the oxidized zone of work face goaf by fogbound agent integration preventing and extinguishing fire technology together, N2, Retardant plays a part of preventing spontaneous combustion of remaining coal simultaneously, and dual fail-safe can be achieved.
- 5. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that aerosol ignition inhibition for fire prevention system System includes atomization pumping plant, pipe-line system and the part of atomizer 3；Atomization pumping plant is provided with:Liquid reserve tank, filter, resistanceization liquid pump, electrically Switch etc.；Pipe-line system is made up of high-voltage tube, high-pressure ball valve and joint；2101 lanes pick one beyond 4101 working face terminal lines Individual aerosol resistanceization chamber, installs 2 aerosol resistanceization pumps (1 make 1 standby), 1 resistanceization liquid pump case and controller switching equipment connect and convey resistanceization Liquid pipeline, atomizer, and atomizer is sealed in 2101 lanes note nitrogen bye-pass away from the nearest three links: link of trade, travel and post of working face.
- 6. a kind of goaf retardant efficiently sprays scheme according to claim 1, it is characterised in that injecting nitrogen system by Nitrogen pumping plant processed, pipe-line system etc. are constituted；On note nitrogen bye-pass, the three links: link of trade, travel and post that 1 angle is less than 45 ° are set at interval of 100m, For connecting retardant atomizer, and by wherein 1 standby port guard seal；Applying aerosol ignition inhibition for fire prevention technology When, retardant is configured to mixed type resistanceization liquid, installation reducing three links: link of trade, travel and post on main transfer pipeline are in away from face end 50m Connect after the completion of the long high-pressure rubber pipes of Φ 16 of 1 60~80m and high pressure valve, debugging efforts, atomizer is arranged on the high pressures of Φ 16 Sebific duct line end, after high-pressure rubber pipe one end is connected with atomizer, by atomizer with it is nearest away from working face in note nitrogen pipeline Three links: link of trade, travel and post are tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710269888.2A CN107060870A (en) | 2017-04-24 | 2017-04-24 | A kind of goaf retardant efficiently sprays scheme |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710269888.2A CN107060870A (en) | 2017-04-24 | 2017-04-24 | A kind of goaf retardant efficiently sprays scheme |
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| Publication Number | Publication Date |
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| CN107060870A true CN107060870A (en) | 2017-08-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710269888.2A Pending CN107060870A (en) | 2017-04-24 | 2017-04-24 | A kind of goaf retardant efficiently sprays scheme |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316962A (en) * | 2018-04-16 | 2018-07-24 | 辽宁工程技术大学 | A kind of mining aerosol retardant spray method |
| CN110173294A (en) * | 2019-05-27 | 2019-08-27 | 中煤科工集团重庆研究院有限公司 | coal mine goaf hidden disaster treatment method |
| CN112282843A (en) * | 2020-11-09 | 2021-01-29 | 辽宁工程技术大学 | Air flow partition nitrogen injection method for rapidly controlling width of goaf oxidation zone |
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| CN106337695A (en) * | 2016-09-23 | 2017-01-18 | 河南理工大学 | Comprehensive treatment method for spontaneous combustion of residual coal in goaf and transfinite gas at upper corner |
| CN107083987A (en) * | 2017-03-24 | 2017-08-22 | 中国矿业大学(北京) | Prevent and treat the nitrogen resistanceization steam fog preparation method and system of underground goaf spontaneous combustionof coal |
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|---|---|---|---|---|
| CN108316962A (en) * | 2018-04-16 | 2018-07-24 | 辽宁工程技术大学 | A kind of mining aerosol retardant spray method |
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| CN110173294A (en) * | 2019-05-27 | 2019-08-27 | 中煤科工集团重庆研究院有限公司 | coal mine goaf hidden disaster treatment method |
| CN112282843A (en) * | 2020-11-09 | 2021-01-29 | 辽宁工程技术大学 | Air flow partition nitrogen injection method for rapidly controlling width of goaf oxidation zone |
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Application publication date: 20170818 |
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