CN102359376B - Air curtain and water mist linkage dust settling method for full mechanized workface - Google Patents
Air curtain and water mist linkage dust settling method for full mechanized workface Download PDFInfo
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- CN102359376B CN102359376B CN201110282780.XA CN201110282780A CN102359376B CN 102359376 B CN102359376 B CN 102359376B CN 201110282780 A CN201110282780 A CN 201110282780A CN 102359376 B CN102359376 B CN 102359376B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000000428 dust Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003595 mist Substances 0.000 title abstract description 7
- 239000003245 coal Substances 0.000 claims abstract description 29
- 239000011435 rock Substances 0.000 claims abstract description 12
- 238000004880 explosion Methods 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims description 51
- 238000000151 deposition Methods 0.000 claims description 14
- 238000009792 diffusion process Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000005507 spraying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
The invention provides an air curtain and water mist linkage dust settling method for a full mechanized workface, which is applicable to dust control in a full mechanized workface in an underground coal mine. According to the invention, an air curtain generator arranged in a no man's zone located between a head-on workface and a driver of a heading machine is started to form an air curtain, and an enclosed area is formed between the head-on workface and the air curtain, which prevents dust from spreading outwards; simultaneously, water mist is injected into the formed enclosed area, and the water mist rapidly disperses in the enclosed area to capture dust in a moistened settling enclosed zone, thereby realizing air curtain and water mist linkage dust settling for the full mechanized workface. The method has the advantages of a simple process, convenient operation, small water consumption, low utilization cost and high dust settling efficiency; the water mist injected into the enclosed area can wet the surface of coal rock mass in head-on full mechanized workface, which enables gas and dust explosion induced by sparks generated in cutting of coal rocks to be avoided; the invention has wide practicality.
Description
Technical field
The present invention relates to a kind of fully mechanized workface air curtain and thin spray linked dust-removing method, be particularly useful for the depositing dust of fully mechanized workface under coal mine.
Background technology
Fully mechanized workface is one of main product dirt pits under coal mine, in operation process, dust generation is large, a large amount of dust are suspended in air, not only make work plane visibility reduce, the normal driving in tunnel is affected greatly, and the healthy formation serious harm to operating personnel, according to statistics, more than 85% Coal Mine Pneumoconiosis patient's operating location is at stone drifting work plane.Therefore, effectively control the dust of fully mechanized workface, for the physical and mental health that ensures underground operators, be of great practical significance.
For administering fully mechanized workface dust, generally adopt at present external spraying, dedusting fan in coal-bed flooding, development machine to take out the methods such as dirt purification, but because the limitation of these methods self causes dust-laying effect also undesirable.As, water injection system for coal seams and complex process, water consumption is large, needs a large amount of water injecting drillings of construction, and engineering quantity is large, and cost is higher.The jet expansion diameter little (being conventionally less than 4mm) that the inside and outside atomizing de-dusting of development machine is used, during depositing dust, nozzle very easily stops up, and mist body particle diameter is larger, and sedimentation is fast, makes water droplet and the contact rate between dust of ejection lower; In addition, be subject to development end Ventilation Effect in use procedure, a large amount of dust flow to external diffusion quickly with the wind, have further shortened the time of contact of water droplet and dust, and the water that is difficult to reach expection fully contacts, soaks the effect of depositing dust with dust; Therefore, inside and outside spray method depositing dust efficiency utilization rate lower and depositing dust water is low.Dedusting fan effective absorption distance is shorter, is difficult to effectively control drifting about to external diffusion of dust, and dust-absorbing rate is lower, and has electrical safety hidden danger, for the large driving face of gas emission, has the hidden danger that causes gas explosion because of electric leakage; Therefore, be not suitable for the depositing dust of the driving face that Gas is larger.In addition, also have at present air curtain to combine the dust-removing method of use with dedusting fan, the dust Control by air curtain, driving face being produced, in certain scope, re-uses dedusting fan the dust of enclosed area is carried out to dust suction processing; The method is a kind of dry type dust-removing method, and outside the defect apart from the above dedusting fan itself, the dust in closed area, gas density are relatively high, produces spark easily bring out the serious accidents such as coal dust, gas explosion once cutting coal petrography.
Summary of the invention
Technical problem: the object of the invention is to overcome the deficiency in prior art, a kind of method is simple, easy and simple to handle, safe and reliable, depositing dust efficiency is high, use cost is low fully mechanized workface air curtain and thin spray linked dust-removing method are provided.
Technical scheme: fully mechanized workface air curtain of the present invention and thin spray linked dust-removing method: when fully-mechanized digging machine carries out the operation of cutting and crushing coal and rock, utilize air curtain that the fully mechanized workface dust that fractured coal and rock produces of meeting head on is sealed, in the dust enclosed area of simultaneously meeting head on to occur at fully mechanized workface, inject the thin water smoke depositing dust that links, step is as follows:
A. under coal mine, fully mechanized workface is met head on and the unmanned operation district tunneled between driver installs air curtain generator, and top, tunnel side arranges fine water fog generator with sidewall intersection in enclosed area;
B. with high-pressure rubber pipe, respectively air curtain generator is connected with the same air line of fine water fog generator and work plane, and on air line, arranges and can open simultaneously and close the link stop valve of control of air curtain and thin water smoke;
C. when fully-mechanized digging machine carries out operation, start air curtain generator and form air curtain, fully mechanized workface meet head on and air curtain between the closed area of formation control dust diffusion, with this, stop dust that development machine operation produces to external diffusion;
When d. starting air curtain generator, start fine water fog generator, in the enclosed area of meeting head on to form, inject thin water smoke by thin water smoke carrier pipe to fully mechanized workface, thin water smoke flow is 6 m
3/ min ~ 10m
3/ min, fogdrop diameter is less than 80 μ m, and the dust of closed area is carried out to moistening, cohesion and sedimentation, and the simultaneously thin moistening roadway surrounding rock of water smoke or coal body produce spark and cause gas and dust explosion accident to prevent from cutting coal petrography.
The distance that described air curtain is met head on apart from driving face is 2.0 m ~ 4.0m; The distance that the outlet of described thin water smoke carrier pipe is met head on apart from driving face is 1.0 m ~ 3.0m, and the outlet internal diameter of thin water smoke carrier pipe is 25mm ~ 50mm; The pressure of described air line is 0.2MPa ~ 0.5MPa.
Beneficial effect: the present invention by air curtain fully mechanized workface under coal mine, meet head on and driver of roadheader between depopulated zone form enclosure space, make in the dust Control that produces in the tunneling process finite region at air curtain and between meeting head on, prevent that dust from spreading to whole tunnel, pollute tunnel air; Simultaneously, by top, tunnel in enclosed area side, to closed area, inject thin water smoke with the thin water smoke outlet that sidewall intersection is arranged, because the thin water smoke injecting is compared particle diameter little (<80 μ m) with the interior external spraying of routine, settling rate is slow, can very fast disperse to whole closed area, Quick Catch is to being distributed in the dust in this closed area and fully contacting with it; A large amount of thin water smoke is wrapped in the surface of dust granules, makes dust by thin water smoke quick humidification sedimentation; Improved the utilization rate of depositing dust efficiency and water, compared with common interior external spraying, this method depositing dust efficiency can improve more than 30%, and water consumption can reduce more than 50%.Internal diameter is that the thin water smoke outlet of 25mm ~ 50 mm has overcome the defect that in conventional interior external spraying use procedure, spraying nozzle often stops up, and has guaranteed that thin water smoke is continuously and stably to the conveying of sealing Kong Chen district.In depositing dust process, by the air curtain forming from the full section of top, tunnel side ground Jet with downward flow direction compressed air, dust is tackled comprehensively and stopped, easy and simple to handle, workman's sight line and working space are not had any impact; Simultaneously, it is moistening that the coal and rock that the thin water smoke of disperse in closed area is also met head on to fully mechanized workface is carried out the degree of depth, in the time of can preventing from cutting coal petrography, produce spark and bring out coal dust, gas explosion, than routine to take dedusting fan higher as main dry type dust-removing method safety, applicability is stronger; In addition, take water, gas the most common and that the most easily obtain under coal mine is raw material, with low cost.It has practicality widely in the art.
The specific embodiment
Fully mechanized workface air curtain of the present invention and thin spray linked dust-removing method, when under coal mine, fully mechanized workface development machine cuts coal petrography, start air curtain, utilize air curtain that the fully mechanized workface dust that fractured coal and rock produces of meeting head on is sealed, by air curtain, stop dust to external diffusion, by the dust Control producing in closed area; And in the enclosed area forming, inject thin water smoke simultaneously, and the dust in closed area air curtain being formed by thin water smoke catches with wetting, by the sedimentation of dust wet type, realizes interlock depositing dust, and concrete steps are as follows:
A. under coal mine, fully mechanized workface is met head on and the unmanned operation district tunneled between driver installs air curtain generator, and top, tunnel side arranges fine water fog generator with sidewall intersection in enclosed area, fine water fog generator comprises thin water smoke carrier pipe and is distributed in the nozzle on thin water smoke carrier pipe, and the outlet internal diameter of thin water smoke carrier pipe is 25mm ~ 50mm;
B. with high-pressure rubber pipe, respectively air curtain generator is connected with the same air line of fine water fog generator and work plane, and air curtain and the stop valve that carefully water smoke links and controls can be opened and be closed to setting on air line simultaneously, the pressure of air line is 0.2MPa ~ 0.5MPa;
C. when fully-mechanized digging machine carries out operation, start air curtain generator and form air curtain, the distance that air curtain is met head on apart from driving face is 2.0 m ~ 4.0m; Fully mechanized workface meet head on and air curtain between the closed area of formation control dust diffusion, with this, stop dust that development machine operation produces to external diffusion;
When d. starting air curtain generator, start fine water fog generator, the distance that the outlet of thin water smoke carrier pipe is met head on apart from driving face is 1.0 m ~ 3.0m; In the enclosed area of meeting head on to form to fully mechanized workface by thin water smoke carrier pipe, inject thin water smoke, thin water smoke flow is 6 m
3/ min ~ 10m
3/ min, fogdrop diameter is less than 80 μ m, and the dust of closed area is carried out to moistening, cohesion and sedimentation, and the simultaneously thin moistening roadway surrounding rock of water smoke or coal body produce spark and cause gas and dust explosion accident to prevent from cutting coal petrography.
Embodiment 1, before fully-mechanized digging machine driving driver position, help section direction to install air curtain generator apart from the fully mechanized workface 2.0m place that meets head on along top, tunnel, at the boundary line along tunnel top side and sidewall, lay the thin water smoke carrier pipe that internal diameter is 32mm, the outlet of thin water smoke carrier pipe is 1.0 m apart from the fully mechanized workface distance of meeting head on.The gas circuit of air curtain generator and fine water fog generator is connected air line through high-pressure rubber pipe respectively, and stop valve is set on pressure ventilation pipe, controls the Push And Release of thin water smoke and air curtain by stop valve simultaneously.During fully mechanized workface driving, open stop valve, air curtain generator forms air curtain, fully mechanized workface meet head on and air curtain between form closed area, the dust that air curtain produces while stoping development machine cutting coal and rock is to external diffusion.Meanwhile, fine water fog generator produces thin water smoke, in the closed area forming, injects thin water smoke by thin water smoke carrier pipe to air curtain, and the flow-control of thin water smoke is at 6m
3/ min ~ 10m
3/ min, pressure is controlled at 0.2MPa ~ 0.5MPa, particle diameter is controlled at below 80 μ m, and the thin water smoke injecting in a large number in enclosed area fully contacts with the dust in enclosed area, and dust is carried out to moistening, cohesion and sedimentation.Along with advancing that fully mechanized workface is met head on, when the distance of meeting head on when air curtain and fully mechanized workface is greater than distance that 4m or thin water smoke carrier pipe outlet and fully mechanized workface meet head on and is greater than 3m, adjust air curtain generator and thin water smoke carrier pipe, guarantee that air curtain and thin water smoke outlet are all the time respectively in the scope in meet head on apart from fully mechanized workface 2.0m ~ 4.0m and 1.0m ~ 3.0m.
Claims (1)
1. a fully mechanized workface air curtain and thin spray linked dust-removing method, it is characterized in that when fully-mechanized digging machine carries out the operation of cutting and crushing coal and rock, utilize air curtain that the fully mechanized workface dust that fractured coal and rock produces of meeting head on is sealed, in the dust enclosed area of simultaneously meeting head on to occur at fully mechanized workface, inject the thin water smoke depositing dust that links, step is as follows:
A. under coal mine, fully mechanized workface is met head on and the unmanned operation district tunneled between driver installs air curtain generator, along top, tunnel side, lay fine water fog generator and thin water smoke carrier pipe with sidewall intersection, thin water smoke carrier pipe outlet is positioned at enclosed area, and its outlet internal diameter is 25mm ~ 50mm;
B. with high-pressure rubber pipe, respectively air curtain generator is connected with the same air line of fine water fog generator and work plane, and air curtain and the stop valve that carefully water smoke links and controls can be opened and be closed to setting on air line simultaneously, in air line, compressed-air actuated pressure is 0.2MPa ~ 0.5MPa;
C. when fully-mechanized digging machine carries out operation, start air curtain generator and form air curtain, the distance that air curtain is met head on apart from driving face is 2.0 m ~ 4.0m, in depositing dust process, by the air curtain forming from the full section of top, tunnel side ground Jet with downward flow direction compressed air, dust is tackled comprehensively and stopped, fully mechanized workface meet head on and air curtain between the closed area of formation control dust diffusion, with this, stop dust that development machine operation produces to external diffusion;
When d. starting air curtain generator, start fine water fog generator, the distance that thin water smoke carrier pipe outlet is met head on apart from driving face is 1.0 m ~ 3.0m, in the enclosed area of meeting head on to form to fully mechanized workface by thin water smoke carrier pipe, large flow injects thin water smoke, and thin water smoke flow is 6 m
3/ min ~ 10m
3/ min, fogdrop diameter is less than 80 μ m, a large amount of thin water smoke injecting in enclosed area fully contacts with the dust in enclosed area, the dust of closed area is carried out to moistening, cohesion and sedimentation, the simultaneously thin moistening roadway surrounding rock of water smoke or coal body, to prevent that cutting coal petrography produces spark initiation gas and dust explosion accident.
2. fully mechanized workface air curtain according to claim 1 and thin spray linked dust-removing method, it is characterized in that: along with advancing that fully mechanized workface is met head on, when the distance of meeting head on when air curtain and fully mechanized workface is greater than distance that 4m or thin water smoke carrier pipe outlet and fully mechanized workface meet head on and is greater than 3m, adjust air curtain generator and thin water smoke carrier pipe, guarantee that air curtain and thin water smoke outlet are all the time respectively in the scope in meet head on apart from fully mechanized workface 2.0m ~ 4.0m and 1.0m ~ 3.0m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110282780.XA CN102359376B (en) | 2011-09-22 | 2011-09-22 | Air curtain and water mist linkage dust settling method for full mechanized workface |
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|---|---|---|---|
| CN201110282780.XA CN102359376B (en) | 2011-09-22 | 2011-09-22 | Air curtain and water mist linkage dust settling method for full mechanized workface |
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| CN102359376A CN102359376A (en) | 2012-02-22 |
| CN102359376B true CN102359376B (en) | 2014-04-16 |
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| CN104196535B (en) * | 2014-08-19 | 2016-04-13 | 山东科技大学 | The two curtain device for reducing dust of a kind of air water for fully-mechanized mining working and dust-removing method |
| CN107387152B (en) * | 2017-09-12 | 2019-07-30 | 中国矿业大学 | A kind of fully mechanized workface ladder subzone of atomization dust pelletizing system |
| CN107620607B (en) * | 2017-09-12 | 2019-04-30 | 中国矿业大学 | A kind of fully mechanized workface step subzone of atomization dust removal method |
| CN111396117B (en) * | 2020-05-14 | 2021-04-27 | 徐州工程学院 | Method for achieving dust settling through linkage of liquid nitrogen mist and fine water mist on fully mechanized excavation face |
| CN111412011B (en) * | 2020-05-14 | 2021-04-27 | 徐州工程学院 | Fine water mist and liquid nitrogen mist linkage system for preventing and treating dust on roadway driving face |
| CN112392534B (en) * | 2020-09-21 | 2022-10-04 | 山西潞安环保能源开发股份有限公司漳村煤矿 | Intelligent air curtain dust separation device for driving working face and dust removal method thereof |
| CN113172068B (en) * | 2021-04-30 | 2022-09-27 | 内蒙古科技大学 | High-pressure fog curtain closed-loop jet dust removal system outside electric shovel |
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| SU827782A2 (en) * | 1979-06-08 | 1981-05-07 | Восточный Научно-Исследовательский Горноруд-Ный Институт | Gas-liquid separator |
| CN2592874Y (en) * | 2002-12-18 | 2003-12-17 | 孙明波 | Air-water combined spraying and purifying apparatus for mine |
| CN101575975A (en) * | 2009-06-18 | 2009-11-11 | 陈中跃 | Dust removing method and device of cantilever-type comprehensive mechanized development machine |
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