CN107575227A - A kind of coal-mining method and roof controlling method - Google Patents
A kind of coal-mining method and roof controlling method Download PDFInfo
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- CN107575227A CN107575227A CN201710728476.0A CN201710728476A CN107575227A CN 107575227 A CN107575227 A CN 107575227A CN 201710728476 A CN201710728476 A CN 201710728476A CN 107575227 A CN107575227 A CN 107575227A
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Abstract
The invention belongs to technical field of coal mine, discloses a kind of coal-mining method and roof controlling method, and the coal-mining method includes：Working face is using single middle thick coal seam full-seam mining inclined longwall retrusive all across the comprehensive mechanical coal mining for falling method；Specifically include：Coal-winning machine coal cutting, scratch board conveyor transporting coal, hydraulic support stand top plate, elapse scratch board conveyor；Coal-winning machine two-ways coal cutting, roller spin are crushed coal with pick, coal are voluntarily loaded into drag conveyor using unit drum blade and conveyer ramp plate, Triangle Coal is cut in both sides termination using beveling feed；In production process, by coal cutting ,-shifting frame-pushes away drag conveyor order and carried out；There is provided a kind of roof controlling method simultaneously.The present invention solves the problems, such as dust-proof effect difference in mining.
Description
Technical field
The invention belongs to technical field of coal mine, more particularly to a kind of coal-mining method and roof controlling method.
Background technology
Mine Dust is one of five big disaster of mine, and the dust of underground is essentially from operation fields such as coal mining, driving, transports
Institute.70%~80% dust is as caused by getting working face in the mine of mechanical coal mining.In recent years, with coal mine machinery
Change the continuous improvement of driving degree, particularly extensive application of the fully-mechanized digging machine in tunnelling, because machine driven headings section (reaches greatly
To 20~25m2), high concentration is produced, influence of the caused dust to working face operating environment is increasing, and dust concentration can
Up to 300~1000mg/m3, seriously endanger the health of worker.External spraying in China's tunneling working face generally use unit at this stage
The dedusting methods such as dust-settling technology, dust removal by ventilation, wet dust removal, injection duster.But due to various dedusting technologies deficiency and
Limitation, still results in that tunneling working face dust-producing amount is big, and visibility is relatively low, not only compromises the health of staff, and seriously
Mine safety is threatened.Therefore adopt an effective measure and preventing and treating is carried out to tunneling working face dust be particularly important.Particularly one
A little traditional dry type depositing dust dedusting technologies and measure can not increasingly meet the needs of production because dust Control is ineffective,
To find out its cause, mainly it is the absence of the control dirt dedusting theoretical direction of system and adapts to coal seam characteristic and the technology wound of piercing technique requirement
Newly.Therefore the integrated control for downhole powder dust turns into important realistic problem urgently to be resolved hurrily at present, has important theory
Meaning and practical value.
In existing full-seam mining long-wall mining, it is related to using two coal-winning machines while the discussion exploited, but its
Simply in the case where considering face length increasing to 300 meters~1000 meters, mined simultaneously using two coal-winning machines；Its institute
The coal-mining method stated is to support the use two coal-winning machines and a drag conveyor, and long-armed working face is divided into two upwards walking
Part, an exploitation part, its purpose is to improve the efficiency of coal mining, increases mine yield, still, brings working face
The problems such as pressure manifestation increase and drag conveyor load increase severely and produce accident increase and management difficulty increasing.To 6.3~7.3
The problem of ultra-thick coal bed of rice is exploited, and its is maximum is not the efficiency mined, but in ultra-thick coal bed recovery process, because
Rib exposure is more and wall caving and roof fall phenomenon distinct issues occurs, the production practice technology that existing two coal-winning machines are mined,
Wall caving and the roof fall occurred in ultra-thick coal bed exploitation effectively can not be improved and solved the problems, such as, equally will also influence coal mining efficiency
With the security of coal mining；Meanwhile the arrangement of ultra-thick coal bed working face be also unsuitable for it is long, when face length is more than 350m,
The support issues of ultra-thick coal bed will will also be increased substantially by severe challenge, underground maintenance cost.Its excessively increasing of comprehensive analysis
Add after face length using two coal-winning machines method of coal mining and uneconomical simultaneously.It is defeated using a coal-winning machine, a scraper plate
Send machine and the supporting coal winning technology of hydraulic support, it is not necessary to working face is arranged oversize, be the master that current fully-mechanized mining working is mined
Coal-mining method is wanted, although by having been able to exploit less than 6 meters high seams after being improved this mining way, make
Coal wall caving and top plate roof fall phenomenon can not be handled timely and effectively when exploiting 6.3~7.3m ultra-thick coal bed with this method, will
The efficiency of coal mining is had a strong impact on, the advantage of high working face full-seam mining coal-mining method can not be played.
In summary, the problem of prior art is present be：It is poor for dust-proof effect in existing coal mining；The efficiency of coal mining is low；
On the one hand the existing high hair of management top plate can not reduce the inbreak of goaf inside ceiling panel rock, reduce the heat dissipation capacity of balkstone；Separately
On the one hand, the entrained out heat of goaf air leaking can not be reduced.
The content of the invention
The problem of existing for prior art, the invention provides a kind of coal-mining method and roof controlling method.
The present invention is achieved in that
A kind of coal-mining method, the coal-mining method is using whole caving methods processing goaf, with single middle thick coal seam, one
Secondary mining full height inclined longwall retrusive all across fall method mine；Including：
Coal-winning machine coal cutting, scratch board conveyor transporting coal, hydraulic support stand top plate, elapse scratch board conveyor；Coal-winning machine is two-way
Coal cutting, roller spin are crushed coal with pick, and it is defeated that coal is voluntarily loaded to scraper plate using unit drum blade and conveyer ramp plate
Machine is sent, Triangle Coal is cut in both sides termination using beveling feed；In production process, by coal cutting-shifting frame-push away drag conveyor order enter
OK.And arrange that coal winning machine spray device for reducing dust, headentry Belt transport are reprinted around coal seam in coal-winning machine coal cutting
Point dust guard, the lane depositing dust drenching installation of working face two and working face coal bunker coal dropping point and the anti-device for reducing dust of main haulage roadway.
Further, in described coal-mining method, by the top coal of middle thick ultra-thick coal bed upper curtate working face extraction using all
Caving method forms upper curtate goaf, and the extensible canopy installed on hydraulic support is stretched out, immediate support exposure top plate, then by three
Level wall supporting device is completely or partially opened, and is protected and is exposed rib；After first half coal-winning machine 10~15 meters of distances of cut, closing on
One, which is arranged, in lower curtate below upper curtate goaf takes over section stope drift active workings；Take in section stope drift active workings and upper curtate
Side extraction drift is parallel to be staggeredly spaced a distance, and arranges in the opposite side for taking over section working face and is put down with back production on the inside of upper curtate
Section is non-faces dead zone stope drift active workings for parallel the taking in lane, makes to take over the inclined arrangement of section working face, carries out taking over section afterwards
The back production of working face；After lower curtate exploitation, hydraulic support and time shift frame, and three-stage side protecting device is all stretched out, protect and expose
Rib；Two coal-winning machines are exploited in the same direction, and when the coal-winning machine cut of the cut first half is to buttock, cut lower curtate is adopted
Coal machine starts to chamfer feed to Return-ing direction, is changed to cut upper curtate；The cut leads to the upper curtate coal-winning machine cut of end
The coal seam of end head, then from end beveled feed, cut lower curtate coal seam, and so on exploit；
Described three-stage side protecting device is made up of one-level face guard, secondary protecting side plate and three-stage side protecting plate three parts, can be with
Simultaneously or partially open；
Length is not small after one-level face guard, secondary protecting side plate and the three-stage side protecting plate of the three-stage side protecting device all stretch out
In the half of mining height；
It is 15~20m that section stope drift active workings, which are taken over, with extraction drift parallel distance on the inside of upper curtate；
The distance of interlocking of extraction drift on the inside of section stope drift active workings and upper curtate of taking over is 1~3m.
Further, at handpiece of scraper conveyer inward in 1m, trough two helps bottom respectively to install row spraying, often arranges 4~6
Individual shower nozzle, water source are controlled with original outside electrospray tandem and using same switch.
Further, in the coal-winning machine coal cutting, in coal-mining method, coal winning machine spray device for reducing dust, Φ 10mm steel is utilized
Muscle is welded into the circular steel ring that two diameters are respectively 400mm and 25mm, and the two is with the zigzag reinforcement welding of a root long 100mm
At one piece, connection reinforcing bar and Φ 25mm steel ring vertical connections, flushed with Φ 400mm steel rings, Φ 25mm steel ring fixed covers spray outside
Mist joint base position, make Φ 400mm steel rings planes with cutting lane into vertical.
Further, in the coal-winning machine coal cutting, fully-mechanized mining working transportation roadway Belt transport transfer point dust guard, reprinting
Point position adhesive tape shelf two is helped to be fixed into inverted triangle shape with 1m × 2m steel plates, and a hemi-closure space will be surrounded at transfer point, and
On the basis of being sprayed in original top position, two help two shower nozzles of each increase, so form circular cone type and catch konisphere.
Further, in the coal-winning machine coal cutting, the lane depositing dust drenching installation of working face two, first on the basis of original water curtain,
Add gauze to be transformed into water curtain net, secondly release nozzle spray function, form low-pressure gravity flow water hole, become by original spraying
Vertical linearity water drenching, water outlet bore dia are maintained at 5~10mm, and pitch of holes 50mm, water drenching is online to water curtain, form one of water
Curtain, water curtain sieve bottom and place top of moving into one's husband's household upon marriage set tank water receiving, and top tank institute water receiving drenches two again to be helped on gauze, and last two
The water drenching that side bottom tank is accepted leads to ditch with water pipe.
Further, in the coal-winning machine coal cutting, working face coal bunker coal dropping point and the anti-device for reducing dust of main haulage roadway, use are soft
Cloth skin to coal-treating nozzle surrounding parcel and extend on adhesive tape, when coal breakage directly drop down onto and avoided on adhesive tape and high speed winds stream is carried out
Docking；On the other hand outside coal dropping point 1.0m, along adhesive tape traffic direction, 0.8~1.5m of diameter semicircles are made with iron sheet, two
Side perforation, which is fixed on adhesive tape shelf, forms closing space, closing length 5m, and a spraying, wetting are set every 1.5m in space
Coal body top layer.
Further, the management method of the hydraulic support stand top plate includes：Top plate is managed with comprehensive filling method：
When being divulged information using mining advancing and U-shaped, inleakage is all bigger.And drawing back is used, tunnel is tamped, with
And the ventilation of W shapes and pressure ventilation, goaf air leaking can be reduced, also can according to the changing rule in goaf air leaking flow field,
Inside goaf, windbreak is constructed every 30~50 meters.
Advantages of the present invention and good effect are：
The present invention solves the problems, such as dust-proof effect difference in mining.Due to leaking into stope and air -return duct from goaf
In it is distinguished and admirable to bring substantial amounts of heat into, so it is also a larger thermal source.When being divulged information using mining advancing and U-shaped,
Inleakage is all bigger.And present invention drawing back is adopted, tunnel, and the ventilation of W shapes and pressure ventilation are tamped, can be subtracted
Few goaf air leaking, also inside goaf, gear can be constructed every 30~50 meters according to the changing rule in goaf air leaking flow field
Brattice, to reduce goaf air leaking, so as to efficiently control the hot moisture for bringing working face into by goaf air leaking.
Grouting filling management top plate is carried out to work face goaf, on the one hand reduces the inbreak of goaf inside ceiling panel rock,
Reduce the heat dissipation capacity of balkstone；On the other hand, after goaf is filled with, leaking out for goaf substantially reduces, so as to reduce
The entrained heat out of goaf air leaking.In addition, the temperature of charges is lower than the temperature of country rock and air, can be empty to mine
Gas plays cooling effect.Surveyed according to similar mine, replace original whole caving methods to manage top plate using whole filling methods, make work unexpectedly
Make 5~10 DEG C of face mercury dropped.The actual conditions in colliery, with the improvement of filler, the exploitation of absorbing and cooling temperature filler
Utilize, when being mined in the future under the protection coal pillar in the exploitation process of working face or under village, under railway, under river etc.,
It is contemplated that filling management top plate using goaf grouting, the temperature of stope is substantially reduced.
The use of the staged full-seam mining coal mining new technology of the present invention, can realize ultra-thick coal bed safety and high efficiency,
Coal mining rate is improved to greatest extent.Its major advantage is：
1. being exploited using staged full-seam mining, the height of disposable exposure rib can be reduced, improves the advance of the face
Speed, the influence of top plate mining pressure is reduced, asked so as to effectively solve caused wall caving and roof fall in ultra-thick coal bed recovery process
Topic.
2. being exploited using staged full-seam mining, the thickness in full-seam mining coal mining coal seam can be improved from present 7m
It is the important breakthrough of production technique to 8m.
3. using staged full-seam mining exploitation ultra-thick coal bed using two coal-winning machines while cut, each coal-winning machine
The height of cut is all controlled within 4.0 meters, and it is relatively low so can effectively to solve power during existing coal-winning machine cut ultra-thick coal bed
Problem, the cutting speed of coal-winning machine can be greatly improved, so as to improve mine yield.
Ultra-thick coal bed is exploited using staged full-seam mining coal-mining method, existing high seam full-seam mining can be made up
The deficiency of coal-mining method, further develop for high seam full-seam mining technology and a kind of feasible coal-mining method is provided.
Brief description of the drawings
Fig. 1 is coal-mining method provided in an embodiment of the present invention and roof controlling method flow chart.
Fig. 2 is fully-mechanized mining working front and rear part provided in an embodiment of the present invention drag conveyor spraying Optimizing Reconstruction design sketch.
Fig. 3 is cutting coal machine atomizing de-dusting apparatus Optimizing Reconstruction design sketch provided in an embodiment of the present invention.
Fig. 4 is transfer point atomizing de-dusting apparatus Optimizing Reconstruction design sketch provided in an embodiment of the present invention.
Fig. 5 is dustproof water screen device for reducing dust Optimizing Reconstruction design sketch provided in an embodiment of the present invention
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is described in detail below in conjunction with the accompanying drawings.
A kind of coal-mining method, the coal-mining method include：
Working face is using single middle thick coal seam full-seam mining inclined longwall retrusive all across the comprehensive mechanization for falling method
Mine；Specifically include：
S101：Coal-winning machine coal cutting；
S102：Scratch board conveyor transporting coal；
S103：Hydraulic support stand top plate；
S104：Elapse scratch board conveyor；
Coal-winning machine two-ways coal cutting, roller spin are crushed coal with pick, utilize unit drum blade and conveyer ramp plate
Coal is voluntarily loaded into drag conveyor, Triangle Coal is cut in both sides termination using beveling feed；In production process, by coal cutting-shifting frame-
Drag conveyor order is pushed away to carry out.
The management method of the hydraulic support stand top plate includes：Top plate is managed with comprehensive filling method：
In described coal-mining method, the top coal of middle thick ultra-thick coal bed upper curtate working face extraction is used into whole caving method shapes
Into upper curtate goaf, the extensible canopy installed on hydraulic support is stretched out, immediate support exposure top plate, then filled three-stage side protecting
All or part of opening is put, protects and exposes rib；After first half coal-winning machine 10~15 meters of distances of cut, adopted closing on upper curtate
One, which is arranged, in lower curtate below dead zone takes over section stope drift active workings；Section stope drift active workings are taken over to put down with back production on the inside of upper curtate
Lane is parallel to be staggeredly spaced a distance, and is arranged in the opposite side for taking over section working face parallel with extraction drift on the inside of upper curtate
Take over that section is non-to face dead zone stope drift active workings, make to take over the inclined arrangement of section working face, carry out taking over section working face afterwards
Back production；After lower curtate exploitation, hydraulic support and time shift frame, and three-stage side protecting device is all stretched out, protect and expose rib；Two
Coal-winning machine is exploited in the same direction, and when the coal-winning machine cut of the cut first half is to buttock, the coal-winning machine of cut lower curtate starts
Feed is chamfer to Return-ing direction, is changed to cut upper curtate；The cut is to the upper curtate coal-winning machine cut go side head of end
Coal seam, then from end beveled feed, cut lower curtate coal seam, and so on exploit；
Described three-stage side protecting device is made up of one-level face guard, secondary protecting side plate and three-stage side protecting plate three parts, can be with
Simultaneously or partially open；
Length is not small after one-level face guard, secondary protecting side plate and the three-stage side protecting plate of the three-stage side protecting device all stretch out
In the half of mining height；
It is 15~20m that section stope drift active workings, which are taken over, with extraction drift parallel distance on the inside of upper curtate；
The distance of interlocking of extraction drift on the inside of section stope drift active workings and upper curtate of taking over is 1~3m.
Due to from goaf leak into stope and air -return duct it is distinguished and admirable to bring substantial amounts of heat into, so it is also
One larger thermal source.When being divulged information using mining advancing and U-shaped, inleakage is all bigger.And drawing back is used, tamp
Tunnel, and the ventilation of W shapes and pressure ventilation, can reduce goaf air leaking, also can be according to the change in goaf air leaking flow field
Rule, inside goaf, windbreak is constructed every 30~50 meters, to reduce goaf air leaking, so as to efficiently control by adopting
Dead zone, which is leaked out, brings the hot moisture of working face into.
Grouting filling management top plate is carried out to work face goaf, on the one hand reduces the inbreak of goaf inside ceiling panel rock,
Reduce the heat dissipation capacity of balkstone；On the other hand, after goaf is filled with, leaking out for goaf substantially reduces, so as to reduce
The entrained heat out of goaf air leaking.In addition, the temperature of charges is lower than the temperature of country rock and air, can be empty to mine
Gas plays cooling effect.Surveyed according to similar mine, replace original whole caving methods to manage top plate using whole filling methods, make work unexpectedly
Make 5~10 DEG C of face mercury dropped.The actual conditions in colliery, with the improvement of filler, the exploitation of absorbing and cooling temperature filler
Utilize, when being mined in the future under the protection coal pillar in the exploitation process of working face or under village, under railway, under river etc.,
It is contemplated that filling management top plate using goaf grouting, the temperature of stope is substantially reduced.
The application principle of the present invention is further described with reference to specific embodiment.
Coal-mining method provided in an embodiment of the present invention and coal winning technology
(1) coal-mining method
Working face is using single middle thick coal seam full-seam mining inclined longwall retrusive all across the comprehensive mechanization for falling method
Mine.
(2) coal winning technology
Coal winning technology：Coal-winning machine coal cutting-scratch board conveyor transporting coal-hydraulic support stand top plate-passage scraper plate transport
Machine, goaf is handled using whole caving methods.
Working face is transported using MG300/720 electrical haulage shearers and SGZ800/800 types flexible flightconveyor.Adopt
Coal machine two-ways coal cutting, roller spin are crushed coal with pick, using unit drum blade and conveyer ramp plate by coal from luggage
Enter drag conveyor, Triangle Coal is cut in both sides termination using beveling feed.In production process, by coal cutting ,-shifting frame-pushes plate conveying
Machine order is carried out, and coal-winning machine is 24 meters (i.e. 16 pack supports) with the spacing distance for moving drag conveyor.
1) synthesis dust prevention
(1) each belt transfer point, scraper-trough conveyer head, coal bunker mouth etc. will install sprayer unit, and disintegrating machine must install dust cover
With sprayer unit (or deduster), and there is special messenger to be responsible for.Transfer point drop should be less than 0.5m, if must be installed more than 0.5m
Chute or guide plate.Each transfer point, which is lifted, will install fixed, adjustable sprayer unit.Sprayer unit spraying will nebulize (spraying pressure
Power is more than 0.7MPa), eject position is reasonable, using normal.Milling coal hole coal discharge outlet must all install sprayer unit or deduster, make
Atomizing de-dusting is carried out during industry or must not be less than 8MPa with deduster dedusting, atomisation pressure.Dust prevention system and synthesis dust prevention facility must
Must improve it is complete, and ensure normal use.
(2) coal-winning machine must use inside and outside sprayer unit, and internal spraying pressure is not less than 2MPa, and external spraying pressure is not less than
4.0MPa, if inner sprayer unit can not normally spray, external spraying pressure cannot be less than 8.0MPa, and hydraulic pressure deficiency must use height
Atomizing pump is pressed, strengthens safeguarding and ensures normal use, atomization will get well, and must start shooting after first boiling water during coal mining, must first stop when stopping adopting
Cut off the water after machine, the damage of such as anhydrous or sprayer unit must be shut down.
(3) when working face meets rock thickness more than 200mm, when length is more than 5m, coal-winning machine is forbidden directly to cut rock；
Meet before rock is blown out will blowing out 20m scope internal frames nearby, on shelf back timber, the place such as rib carry out watering and lowering dust.Explosion
When to open to blow out and sprayed between section and forward and backward 10 groups of framves.Perforating must use wet drilling, and explosion must use water stemming material.
(4) daily maintenance crew of unit in charge of construction will clean coal dust once to working face, and two will clean a dant along each former class
Dirt, prevent coal dust from accumulating.
(5) working face must every frame install and move frame automatic sprayer, drop post, synchronous spraying when moving frame, disintegrating machine is necessary
Dust cover and sprayer unit are installed, spraying and spillplate are sprayed and must nebulized using during use between the face frame that works.
2) fully-mechanized mining working dust concentration detects
The instrument and method of fully-mechanized mining working dust concentration detection are identical with the instrument and method that fully mechanized workface detects, when
Sampled during coal-winning machine coal cutting, sampling position is located at away from coal-winning machine return side 10m, fortune is blurted out and the use place for mouth of rolling back and rationalizing
At away from face end 10m.Dust concentration testing result is shown in Table 1.
The dust concentration testing result of table 1
The full dirt of N2717 coal-faces can be seen that according to the dust concentration testing result of table 1 and exhale dust concentration to be all far above
State health standards, and the dust concentration of two crossheadings is slightly above state health standards, this explanation dust is with distinguished and admirable along work
Make face gradually to be settled, only a small number of small particle dust are with distinguished and admirable motion, as long as therefore taking adequate measures coal-winning machine
Dust is timely caught caused by coal cutting, it becomes possible to is obtained good dust-laying effect, is conveyed for the scraper plate at two crossheadings
Machine transfer point, belt transfer point, coal bunker coal dropping point, main haulage roadway gatehead and the dust collector of water curtain in two lanes are improved can
To obtain good synthesis dust prevention effect.
3) comprehensive anti-measurements for reduction optimisation technique scheme
The main dust process of fully-mechanized mining working have coal-winning machine coal cutting, coal breakage, coaling, hydraulic moving stand, transport reprint,
Transporter coal breakage etc..With the improvement of coal winning technology, the use of deep, the high-power mechanical coal excavation apparatus of large conveying quantity is cut greatly now, with
And the extension with exploiting field, coal stream is in the lengthening of working face transportation range, the increase of transfer point quantity so that working face and tunnel
Coal powder content in air remains high.Survey the ore deposit fully-mechanized mining working dust concentration and be up to 102.81mg/m3, significantly larger than coal
The allowed maximum concentration 10mg/m of the 739th article of regulation of ore deposit safety code3.It is right due to dust itself composition and its characteristic
There is great threat in the staff of Work places and the security of environment on coalface.Therefore, using effective dust-proof
And measurements for reduction, suppress dirt source, block dirt stream, treat both principal and secondary aspect of disease, just seem extremely important.At present, scene is taken main dust-proof
Measure is exactly the method progress depositing dust that dust point is sprayed spray sprinkler between support using unit in process of production, according to underground
The situation of actual dust concentration, propose to carry out fully-mechanized mining working coal dust the measure of the comprehensive regulation.
4) fully-mechanized mining working surface conveyer transfer point dust guard：
(1) original present situation：Reprinting sprayer unit is installed above at head, and sprayer unit orientation is directed at coal breakage
Point, this measure can soak a part of coal body of conveyor surface, play a part of dust-proof effect, but fully-mechanized mining working production period
Between coal output it is big, and often wind speed is higher at extra exit under working face, and it is thicker that conveyer transports coal body, and bottom coal body can not be by
Wetting, when reprinting whereabouts, coal body flies away, and trickle coal body particle, which is entrained in air intake, in not wetted coal body enters work
Face.
(2) prioritization scheme：At handpiece of scraper conveyer inward in the range of 1m, trough two helps bottom respectively to install row spray
Mist, often arranges 4~6 shower nozzles, and water source is controlled (as shown in Figure 2) with original outside electrospray tandem and using same switch.
So installation spraying in top soaks conveyer top layer coal body, and the spraying of bottom improvement and installation is by the following coal body in top layer
Soaked, it is comprehensive to reduce Dust Concentration at the drag conveyor of working face front and rear part.
5) fully mechanized mining cutting coal machine external spraying device for reducing dust
(1) original present situation：It is each at rocking arm before and after cutting coal machine that external spraying device at one is set, spray towards pick, because of coal cutting
It is larger that lane position wind speed is cut residing for machine, water smoke caused by coal dust caused by coal cutting machine cylinder coal cutting and external spraying is together distinguished and admirable
Take away and back into Shang Fu lanes by cutting lane, causing to cut Xiang Jishangfu lanes during coal cutting, lane position coal dust is big and air humidity close to cutting
Height, have a strong impact on operation workers ' safety health.
(2) prioritization scheme：Using Φ 10mm reinforcement weldings into two diameters be respectively 400mm (the soft gauze bags of steel ring
Around) and 25mm (this data depends on external spraying bond diameter) circular steel ring, the two is with the zigzag reinforcing bar of a root long 100mm
One piece is welded on, reinforcing bar and Φ 25mm steel ring vertical connections is connected, is flushed with Φ 400mm steel rings, Φ 25mm steel ring fixed covers exist
External spraying joint base position, make Φ 400mm steel rings planes with cutting lane into vertical (as shown in Figure 3).This measure utilizes Air Filter
Principle is caught with the distinguished and admirable water smoke and coal dust to wave of high speed, coal dust is mixed to form the big water coal of quality with water smoke and is sunk, can
Efficiently and effectively reduce coal dust and water smoke caused by coal cutting.
6) fully-mechanized mining working transportation roadway Belt transport transfer point dust guard
(1) original present situation：Static shelving at adhesive tape head transfer point, 1~2, shower nozzle is installed on shelf, is directed at coal dropping point,
Atomizing de-dusting is opened during producing coal, when coal amount is excessive, on the one hand trickle water dust, the opposing party caused by water smoke and coal dust hit
The not wetted coal body in face is flown upward, and Dust Concentration is often higher before and after transfer point.
(2) prioritization scheme：In transfer point position, adhesive tape shelf two helps to use 1m (width) × 2m (length) steel plates into " inverted triangle " shape
It is fixed, a hemi-closure space (as shown in Figure 4) will be surrounded at transfer point, and on the basis of the spraying of original top position, two
Two shower nozzles of each increase are helped, " circular cone type " is so formed and catches konisphere, can be greatly improved and catch dirt effect.
7) the lane depositing dust drenching installation of working face two
(1) original present situation：1 water is respectively installed in secondary entrance to a lane with inner above and below working face in the range of 20~50m beyond extra exit
Curtain, carry out tunneling boring depositing dust.This measure because injection flow rate is big, water curtain nearby can not operation, pedestrian, when air quantity is larger, a large amount of water smokes
Farther place is floated towards with the wind, causes neighbouring staff garments often to be drenched, and most of administrative staff are to avoid being drenched often shortening
Water curtain even is stopped, does not have due dust-laying effect, and a large amount of waste water drainages are difficult.
(2) prioritization scheme：First on the basis of original water curtain, gauze is added to be transformed into water curtain net, secondly by nozzle spray work(
It can release, form low-pressure gravity flow water hole, becoming vertical linearity water drenching by original spraying, (water outlet bore dia is unsuitable excessive, should
It is maintained at 5~10mm, pitch of holes 50mm), water drenching is online to water curtain, forms water curtain together truly, water curtain net bottom
Portion and place top of moving into one's husband's household upon marriage set tank water receiving, and top tank institute water receiving drenches two again to be helped on gauze, and last two help bottom tank
The water drenching of undertaking leads to ditch (as shown in Figure 5) with water pipe, it is so distinguished and admirable in dust meet water curtain net and form water coal slime then quilt
Water drenching washes away.
On the one hand the dust after chance water is avoided to continue to fly upward；Another aspect avoids near caused by spraying and holdee
Clothes is drenched, the setting for top water receiving tank of moving into one's husband's household upon marriage avoids water drenching and drenched to holdee.
8) working face coal bunker coal dropping point and the anti-device for reducing dust of main haulage roadway
(1) original present situation：Spraying is set above coal bunker, and lower section turns coal-treating nozzle dress by feeder connection and spilt to adhesive tape, slips
For coal mouth away from adhesive tape height 1.0m, lower section sets spraying alignment coal dropping point, carries out depositing dust, and because of coal bunker, to slip coal amount big at present, if reprinting
The spraying that point is set is so that quantity is more, water yield can play greatly certain depositing dust purpose, but so easily cause coal body overly moist, influence
Transhipment and ature of coal, on the other hand because coal dropping port is remote away from adhesive tape distance, and adhesive tape main entry is generally air intake main entry, and wind speed is higher, falls
Coal dust is easily flown upward during coal and during transhipment.
(2) prioritization scheme：On the one hand coal breakage dust production resource is eliminated, because of safety factor, coal-treating nozzle can not be extended on adhesive tape, right
This to coal-treating nozzle surrounding parcel and extend on adhesive tape using soft cloth skin, such coal breakage directly drop down onto avoided on adhesive tape with
High speed winds stream is docked, and releases this dust production resource；On the other hand outside coal dropping point 1.0m, along adhesive tape traffic direction, iron sheet is used
0.8~1.5m of diameter (diameter is on the basis of adhesive tape shelf width) semicircles are made, two help perforation to be fixed on shape on adhesive tape shelf
Into closing space, more than length 5m is closed, set one to spray every 1.5m in space, Wetting Coal top layer, this avoid
After coal body drops down onto on adhesive tape in transportation with head-on high speed is distinguished and admirable dock caused by coal dust fly upward.
9) other dust preventions
For the further Dust Concentration for reducing fully-mechanized mining working, in actual production process, may be used also with reference to above-mentioned measure
To use following method.
Coal-bed flooding.If playing dry hole in coal seam in advance before back production, press water is injected by drilling, oozes water
Enter to inside coal body, increase the adhesion strength between the moisture of coal and grit, and reduce the intensity and fragility of coal, reduce coal when mining
The growing amount of dirt.Coal-bed flooding plays continuous dustproof effect in whole exploitation process, has a positive effect, but quantities compared with
Greatly, water consumption is big, influences ature of coal.
Screen is set at the air intake of working face, reduces as far as possible and distinguished and admirable enters goaf.Also set in working face upper port
Air curtain is put, guiding is distinguished and admirable to be avoided producing vortex here.
Artificial spray sprinkler periodically is carried out to air intake lane tunnel and return aircourse, reduces the dust of wall.10)
Comprehensive anti-depositing dust optimization points for attention
The shower nozzle outer of drag conveyor bottom installation should avoid stretching with helping to be maintained on a section in conveying machine baffle
Go out after baffle plate the quarrel block conveyed to break.
Coal bunker guard should strengthen making an inspection tour, and avoid bulk materials from entering coal bunker and cause to close the damage of iron sheet.
Each place spraying nozzle and water yield control should be determined according to the dust-proof pressure of supply water of working face and coal output, be kept away
Exempt from that water is small fully Wetting Coal and water to cause the appearance of coal body overly moist situation greatly.
The present invention manages top plate with comprehensive filling method
Due to from goaf leak into stope and air -return duct it is distinguished and admirable to bring substantial amounts of heat into, so it is also
One larger thermal source.When being divulged information using mining advancing and U-shaped, inleakage is all bigger.And drawing back is used, tamp
Tunnel, and the ventilation of W shapes and pressure ventilation, can reduce goaf air leaking, also can be according to the change in goaf air leaking flow field
Rule, inside goaf, windbreak is constructed every 30~50 meters, to reduce goaf air leaking, so as to efficiently control by adopting
Dead zone, which is leaked out, brings the hot moisture of working face into.
Grouting filling management top plate is carried out to work face goaf, on the one hand reduces the inbreak of goaf inside ceiling panel rock,
Reduce the heat dissipation capacity of balkstone；On the other hand, after goaf is filled with, leaking out for goaf substantially reduces, so as to reduce
The entrained heat out of goaf air leaking.In addition, the temperature of charges is lower than the temperature of country rock and air, can be empty to mine
Gas plays cooling effect.Surveyed according to similar mine, replace original whole caving methods to manage top plate using whole filling methods, make work unexpectedly
Make 5~10 DEG C of face mercury dropped.The actual conditions in colliery, with the improvement of filler, the exploitation of absorbing and cooling temperature filler
Utilize, when being mined in the future under the protection coal pillar in the exploitation process of working face or under village, under railway, under river etc.,
It is contemplated that filling management top plate using goaf grouting, the temperature of stope is substantially reduced.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of coal-mining method, it is characterised in that the coal-mining method is using whole caving methods processing goaf；Including：Mine
Machine cut coal, scratch board conveyor transporting coal, hydraulic support stand top plate, elapse scratch board conveyor；Coal-winning machine two-ways coal cutting, roller spin
Coal is crushed with pick, coal is voluntarily loaded into drag conveyor, both sides termination using unit drum blade and conveyer ramp plate
Triangle Coal is cut using beveling feed；By coal cutting ,-shifting frame-pushes away drag conveyor order and carried out；And the coal seam in coal-winning machine coal cutting
Surrounding arrangement coal winning machine spray device for reducing dust, headentry Belt transport transfer point dust guard, the lane of working face two drop
Dirt drenching installation and working face coal bunker coal dropping point and the anti-device for reducing dust of main haulage roadway.
2. coal-mining method as claimed in claim 1, it is characterised in that the coal-mining method specifically includes：By middle thick super thick coal
The top coal of layer upper curtate working face extraction forms upper curtate goaf using whole caving methods, flexible by what is installed on hydraulic support
Beam stretches out, and immediate support exposure top plate, then completely or partially opens three-stage side protecting device, protects and expose rib；Work as upper half
After 10~15 meters of distances of portion's coal-winning machine cut, arrange that taking over section for one returns in the lower curtate below upper curtate goaf is closed on
Adopt tunnel；Take over that extraction drift on the inside of section stope drift active workings and upper curtate is parallel to be staggeredly spaced a distance, taking over section work
Make the opposite side arrangement in face and upper curtate inner side extraction drift parallel taking over section is non-to face dead zone stope drift active workings, make to take over section
The inclined arrangement of working face, carry out taking over the back production of section working face afterwards；After lower curtate exploitation, hydraulic support and time shift frame,
And all stretch out three-stage side protecting device, protect and expose rib；Two coal-winning machines are exploited in the same direction, when the coal-winning machine of the cut first half
When cut is to buttock, the coal-winning machine of cut lower curtate starts to chamfer feed to Return-ing direction, is changed to cut upper curtate；Institute
Cut is stated to the coal seam on the upper curtate coal-winning machine cut go side head of end, then from end beveled feed, cut lower curtate coal
Layer, reciprocal exploitation；
Described three-stage side protecting device is made up of one-level face guard, secondary protecting side plate and three-stage side protecting plate three parts, can be simultaneously
Or partially open；
Length, which is not less than, after one-level face guard, secondary protecting side plate and the three-stage side protecting plate of the three-stage side protecting device all stretch out adopts
High half；
It is 15~20m that section stope drift active workings, which are taken over, with extraction drift parallel distance on the inside of upper curtate；
The distance of interlocking of extraction drift on the inside of section stope drift active workings and upper curtate of taking over is 1~3m.
3. coal-mining method as claimed in claim 1, it is characterised in that at handpiece of scraper conveyer inward in 1m, trough two
Help bottom respectively installation one row spraying, often arrange 4~6 shower nozzles, water source with it is original outside electrospray tandem and using it is same switch into
Row control.
4. coal-mining method as claimed in claim 1, it is characterised in that in the described coal-winning machine coal cutting, sprayed outside coal-winning machine
Mist device for reducing dust utilizes the circular steel ring that Φ 10mm reinforcement weldings are respectively 400mm and 25mm into two diameters, two circular steels
Circle, at one piece, connects reinforcing bar and Φ 25mm steel ring vertical connections, with Φ 400mm steel with the zigzag reinforcement welding of a root long 100mm
Circle flushes, and Φ 25mm steel rings fixed covers make Φ 400mm steel rings planes with cutting lane into vertical in external spraying joint base position.
5. coal-mining method as claimed in claim 1, it is characterised in that in the described coal-winning machine coal cutting, working face transport
Lane Belt transport transfer point dust guard is helped to be fixed into inverted triangle shape with 1m × 2m steel plates in transfer point position adhesive tape shelf two, will
A hemi-closure space is surrounded at transfer point, and on the basis of the spraying of original top position, two help two shower nozzles of each increase, this
Sample forms circular cone type and catches konisphere.
6. coal-mining method as claimed in claim 1, it is characterised in that in described coal-mining method,
In the coal-winning machine coal cutting, the lane depositing dust drenching installation of working face two adds gauze to be transformed into first on the basis of original water curtain
Water curtain net；Secondly nozzle spray function is released, forms low-pressure gravity flow water hole, vertical linearity leaching is become by original spraying
Water, water outlet bore dia is in 5~10mm, and pitch of holes 50mm, water drenching is online to water curtain, forms one of water curtain, water curtain sieve bottom and
Move into one's husband's household upon marriage and locate top setting tank water receiving, top tank institute water receiving drenches two again to be helped on gauze, and last two help bottom tank to accept
Water drenching lead to ditch with water pipe.
7. coal-mining method as claimed in claim 1, it is characterised in that in the coal-winning machine coal cutting, working face coal bunker coal dropping point
And the anti-device for reducing dust of main haulage roadway carries out surrounding parcel to coal-treating nozzle using soft cloth skin and extended on adhesive tape；On the other hand exist
Outside coal bunker coal dropping point 1.0m, along adhesive tape traffic direction, 0.8~1.5m of diameter semicircles are made with iron sheet, two help perforation to fix
In forming closing space on adhesive tape shelf, length 5m is closed, set one to spray every 1.5m in space, Wetting Coal top layer.
A kind of 8. management method of the top plate of coal-mining method as claimed in claim 1, it is characterised in that the management method bag
Include：
Top plate is managed with comprehensive filling method：
Using drawing back, tunnel, and the ventilation of W shapes and pressure ventilation are tamped；Inside goaf, every 30~50 meters of structures
Build windbreak.
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| CN201710728476.0A CN107575227A (en) | 2017-08-23 | 2017-08-23 | A kind of coal-mining method and roof controlling method |
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| CN201710728476.0A CN107575227A (en) | 2017-08-23 | 2017-08-23 | A kind of coal-mining method and roof controlling method |
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| CN111706329A (en) * | 2020-06-28 | 2020-09-25 | 中国矿业大学 | Intelligent mining process integrating excavation, transportation, branch and branch |
| CN112431593A (en) * | 2020-10-15 | 2021-03-02 | 重庆市能源投资集团科技有限责任公司 | Automatic coal cutting process |
| CN113464141A (en) * | 2021-08-25 | 2021-10-01 | 国能神东煤炭集团有限责任公司 | Triangular coal area recovery method |
| CN114893180A (en) * | 2022-04-26 | 2022-08-12 | 秦兵文 | Dust device and coal-winning machine |
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Application publication date: 20180112 |