CN109538275A - The forced ventilation method and ventilating system of a kind of longwall mining working face tail portion - Google Patents
The forced ventilation method and ventilating system of a kind of longwall mining working face tail portion Download PDFInfo
- Publication number
- CN109538275A CN109538275A CN201811375540.2A CN201811375540A CN109538275A CN 109538275 A CN109538275 A CN 109538275A CN 201811375540 A CN201811375540 A CN 201811375540A CN 109538275 A CN109538275 A CN 109538275A
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- Prior art keywords
- working face
- longwall mining
- mining working
- tail portion
- air duct
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/02—Suspension devices for tubes or the like, e.g. for ventilating ducts
Abstract
The invention discloses a kind of forced ventilation method of longwall mining working face tail portion and ventilating systems.The forced ventilation method of a kind of longwall mining working face tail portion, comprising: an at least booster is placed on the equipment train of air inlet；Flexible air duct is hung in the tunnel of the longwall mining working face, and the air inlet port of the flexible air duct is made to connect a booster, outlet port arrives at longwall mining working face tail portion, in order to make air inlet it is fresh it is distinguished and admirable be delivered directly to longwall mining working face tail portion via flexible air duct, thus make the foul atmosphere of longwall mining working face tail portion directly transport it is fresh distinguished and admirable under the action of be discharged through air return lane；Scalable flexible air duct is placed in the tunnel infall of air inlet and longwall mining working face, for connecting the flexible air duct and booster.The present invention can be realized the long-term ventilation safety of longwall mining working face tail portion.
Description
Technical field
The present invention relates to the forced of underground coal mine aeration technology field more particularly to a kind of longwall mining working face tail portion
Method of ventilation and ventilating system.
Background technique
Coal resources are utilized for Efficient Development, narrow and small coal pillar gob side entry driving is stayed to open in thick coal-layer mining especially super high seam
It is had obtained relatively broad application in adopting, but by violent digging disturbing influence, the difficult, dynamic pressure along empty side roof timbering occurs and show
The problems such as now violent.Thus part mine especially has the mine of bump risk, usually stays and sets between section working face
Big width protection coal pillar, avoids stress from concentrating, and then prevents the generation of the coal rock dynamic disasters such as bump to the greatest extent.For
Resource recovery is improved, part mine realizes entity coal and big width protection coal pillar is adopted together.Wherein, entity coal and big width are protected
For shield coal column with when adopting, entire coal working face is divided into two parts, and a part is entity coal stope, and another part is big wide
Spend protection coal pillar stope.With during adopting, entire coal working face tail portion is (i.e. big for entity coal and big width protection coal pillar
Width protection coal pillar stope tail portion) it be easy to cause gas exceeding limit, pernicious gas and dust difficult due to local ventilation difficulty
With problems such as discharges.
Currently, booster is arranged in back by part mine to solve the problems, such as that the local ventilation of working face tail portion is difficult
Air way or working face tail portion.The arrangement by booster be placed in it is dirty it is distinguished and admirable in, not only violate safety regulations in coal mine,
Seriously affect Local Ventilation Equipment in Coal Mine safety, and it is fresh it is distinguished and admirable be difficult to be delivered to working face tail portion, directly result in the place gas,
Pernicious gas and dust accumulation, seriously threaten operation safety.Once gas exceeding limit, it would be possible to Gas Disaster accident be caused to be sent out
It is raw, and then significantly increase mine gas calamity source.In addition, being directed to working face tail portion local ventilation method, it is thus proposed that
Booster is installed in air inlet main entry, passes through air inlet via air inlet main entry for conveying fresh distinguished and admirable flexible ventilation duct
Lane is through to working face tail portion.This method plays certain effect in terms of the ventilation of working face tail portion.But ventilation practice at the scene
In, have the following problems: one, it is fresh it is distinguished and admirable successively to get to working face tail portion by air inlet main entry, air inlet, with logical
Wind route is elongated, and air pipeline interface increases, and inleakage increases, and the air flow property in tunnel gradually weakens, ventilation effect by
Gradual change is poor, and when going deep into working face tail portion, gas, pernicious gas and dust etc. are difficult to be discharged, working face tail portion environmental degradation；
Two, from air inlet main entry by air inlet to working face tail portion introduce it is fresh distinguished and admirable, air pipeline since vent line is long and elongated,
Ventilation shaft is difficult in maintenance, also adds ventilation cost.
Summary of the invention
The object of the invention is to provide a kind of longwall mining working face to overcome the above-mentioned problems of the prior art
The forced ventilation method of tail portion can be realized the long-term ventilation safety of longwall mining working face tail portion, improve working face tail portion
Working environment.
It is a further object of the present invention to provide a kind of pressures system of ventilation of longwall mining working face tail portion.
In order to realize the first object of the present invention, the following technical schemes are provided:
A kind of forced ventilation method of longwall mining working face tail portion, the longwall mining working face includes: entity coal
Stope and big width protection coal pillar stope, longwall mining working face tail portion, that is, big width protection coal pillar return
Mining face tail portion, comprising: an at least booster is placed on the equipment train of air inlet；Flexible air duct is hung on
In the tunnel of the longwall mining working face, and the air inlet port of the flexible air duct is made to connect a booster,
Outlet port arrives at longwall mining working face tail portion, in order to make the fresh distinguished and admirable directly defeated via flexible air duct of air inlet
It is sent to longwall mining working face tail portion, to keep the foul atmosphere of longwall mining working face tail portion fresh distinguished and admirable what is directly transported
Under the action of be discharged through air return lane；Scalable flexible air duct is placed in the tunnel infall of air inlet and longwall mining working face,
For connecting the flexible air duct and booster.
Preferably, the foul atmosphere for making longwall mining working face tail portion directly transport it is fresh distinguished and admirable under the action of
Through the distinguished and admirable guide plate of outlet port arrangement that air return lane discharge includes: in the flexible air duct, and make the distinguished and admirable guide plate
One end be tightly connected the outlet port of the flexible air duct, the other end is contradicted to for by upper curtate goaf and this section work
The gangue concrete filled wall kept apart as face, so that force from flexible air duct outlet port fresh distinguished and admirable flows through longwell
Coal working face is discharged behind tail portion through air return lane.
Preferably, it is hydraulic to hang on the hydraulic support two constantly promoted with the longwall mining working face for the flexible air duct
Below top beam between column；Wherein, the hydraulic support is laid with installation along the tendency length direction of the longwall mining working face,
For to the air inlet, entity coal stope, air return lane and the corresponding work of big width protection coal pillar stope
Face top plate carries out immediate support.
Wherein, when the tendency length direction along longwall mining working face is followed successively by the air inlet, entity coal back production work
When making face, air return lane and big width protection coal pillar stope, flexibility air duct the inclining along the longwall mining working face
It is arranged to length direction across entire longwall mining working face, and the distinguished and admirable guide plate setting is in the flexible air duct outlet air
The top of port, in order to make fresh distinguished and admirable flow through behind longwall mining working face tail portion through being discharged by air return lane.
Preferably, the tunnel of the air return lane and entity coal stope, big width protection coal pillar stope connects
Passage port is equipped with air partition, and hangs with screen on the hydraulic support at the tunnel communication port, adopts for being directed to flow past longwell
It is discharged after the distinguished and admirable inflow air return lane of dirt formed behind coal working face tail portion.
Alternatively, when being followed successively by the air return lane, entity coal back production work along the tendency length direction of longwall mining working face
When making face, air inlet and big width protection coal pillar stope, flexibility air duct the inclining along the longwall mining working face
It is arranged to length direction across big width protection coal pillar stope, and the distinguished and admirable guide plate setting is in the flexible wind
The bottom of cylinder outlet port, in order to make fresh distinguished and admirable flow through after entire longwall mining working face through being discharged by air return lane.
Preferably, the top beam between two hydraulic vertical props of the hydraulic support is arranged right below air duct hook, the flexibility
Air duct, which is equipped with, links up with the fixed hook mutually hooked with the air duct.
In order to realize the second object of the present invention, the following technical schemes are provided:
A kind of pressure system of ventilation of longwall mining working face tail portion, the longwall mining working face includes: entity coal
Stope and big width protection coal pillar stope, longwall mining working face tail portion, that is, big width protection coal pillar return
Mining face tail portion, comprising: at least booster being placed on the equipment train of air inlet；The longwell is hung on to adopt
Flexible air duct in the tunnel of coal working face, air inlet port connect a booster, and outlet port arrives at institute
Longwall mining working face tail portion is stated, in order to make the fresh of air inlet distinguished and admirable be delivered directly to longwall mining work via flexible air duct
Make face tail portion, thus make the foul atmosphere of longwall mining working face tail portion directly transport it is fresh distinguished and admirable under the action of through return air
Lane discharge；It is placed in the scalable flexible air duct of the tunnel infall of air inlet and longwall mining working face, it is described soft for connecting
Property air duct and booster.
Preferably, the outlet port of the flexible air duct is disposed with distinguished and admirable guide plate；And the one of the distinguished and admirable guide plate
End is tightly connected the outlet port of the flexible air duct, and the other end is contradicted to for by upper curtate goaf and this section working face
The gangue concrete filled wall kept apart.
The beneficial effects of the present invention are embodied in following aspect:
1) forced ventilation method and ventilating system that the present invention is provided for longwall mining working face tail portion, utilize arrangement
In the booster air feed of air inlet, using flexible air duct directly by it is fresh it is distinguished and admirable be transported to working face tail portion, realize and continue
Being pressed into working face tail portion for safety is fresh distinguished and admirable, efficiently solves working face tail portion ventilating problem, avoids gas exceeding limit, nocuousness
Gas and dust such as are difficult to be discharged at the problems, and then prevent gas accident, and mine is promoted to realize safe high-yield and high-efficiency；
2) the air feed place of booster is arranged in air inlet by the present invention, meets safety regulations in coal mine, from safety sheet
Matter type angle realizes the safety of ventilation.Meanwhile using air inlet as the air feed place of booster, than being arranged in air inlet
Main entry shortens vent line, so as to shorten for conveying the length of distinguished and admirable flexible air duct, reduces inleakage, improves
Ventilation effect has saved ventilation cost.In addition, booster is placed on the equipment train of air inlet by the present invention, set
In the booster on equipment train as the longwall mining advance of the face is flexibly moved, so that booster be made to lean on always
Nearly longwall mining working face, as far as possible shortening vent line；
3) present invention is located at the booster of air inlet and connects between the flexible air duct of longwall mining working face
Both scalable or flexible scalable flexible air duct, improves the leakproofness that booster and flexibility air duct connect, avoids leaking
Wind；
4) the present invention distinguished and admirable guide plate adaptable in the outlet port arrangement of flexible air duct, for producing working face tail portion
Raw waste air is guided to air return lane and is discharged, and the local ventilation route and entity coal stope for making working face tail portion are logical
Wind route forms mutually independent vent line, avoids ventilation disorder.
Detailed description of the invention
Fig. 1 a is the structural schematic diagram of the forced ventilation embodiment of the method one of longwall mining working face of the present invention tail portion；
Fig. 1 b is the structural schematic diagram of the forced ventilation embodiment of the method two of longwall mining working face of the present invention tail portion；
Fig. 2 is A1-A1 sectional view shown in Fig. 1 a of the present invention；
Fig. 3 is A2-A2 sectional view shown in Fig. 1 b of the present invention；
Fig. 4 is the structural schematic diagram of scalable flexible air duct of the invention；
Fig. 5 a is that the outlet port of the flexible air duct of the embodiment of the present invention one arranges the structural schematic diagram of distinguished and admirable guide plate；
Fig. 5 b is top view shown in Fig. 5 a；
Fig. 6 a is that the outlet port of the flexible air duct of the embodiment of the present invention two arranges the structural schematic diagram of distinguished and admirable guide plate；
Fig. 6 b is top view shown in Fig. 6 a.
Description of symbols: 1-goaf；2-hydraulic supports；3-scalable flexible air ducts；4-boosters supply
That gives is fresh distinguished and admirable；5-booster ventilation shafts；6-boosters；7-air inlets；8-air inlets are naturally fresh
It is distinguished and admirable；9-coalcutters；10-entity coal stopes；11-longwall mining working face tail regions；12-upper curtates are mined out
Area；13-working face tail portion dirts are distinguished and admirable；14-flexible air ducts；15-big width protection coal pillar stopes；16-air partitions；
17-air return lane dirts are distinguished and admirable；18-air return lanes；19-distinguished and admirable guide plates；20-gangue concrete filled walls.
Specific embodiment
The present invention provides the forced ventilation method and ventilating system of a kind of longwall mining working face tail portion.Such as Fig. 1 a and 1b
Shown, longwall mining working face of the present invention includes: entity coal stope 10 and big width protection coal pillar back production work
Make face 15.Wherein, longwall mining working face tail portion, that is, big width protection coal pillar stope tail portion.
As seen in figure la and lb, when using natural airflow to longwall mining face-airing, air inlet naturally fresh distinguished and admirable 8
Entered by air inlet 7, is just discharged by air return lane 18 after flowing through entity coal stope 10.Therefore, using natural airflow to length
When wall coal working face is divulged information, it is only able to satisfy entity coal stope 10 and big width protection coal pillar stope front
Air-conditioning requirement is but difficult to meet positioned at the logical of longwall mining working face tail portion (i.e. big width protection coal pillar stope tail portion)
Wind requirement.
The forced ventilation method and ventilating system of longwall mining working face provided by the invention tail portion, for solving entity
(i.e. big width is protected with longwell coal working face tail portion when adopting for coal stope 10 and big width protection coal pillar stope 15
Protect pillar extraction working face tail portion) ventilation difficult problem, thus solve as ventilation it is difficult caused by gas exceeding limit, You Haiqi
Body and dust such as are difficult to be discharged at the problems, provide ventilation safety guarantee to realize entity coal and big width protection coal pillar with adopting, show
It writes and is conducive to safety of coal mines, and then prevent gas accident.
In the description of the present invention, it is to be understood that, indicating positions or the position such as "left", "right", "upper" "lower" in text
The term of relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, and
It is not to indicate or imply signified device, element etc. to must have a particular orientation or be constructed and operated in a specific orientation,
Therefore it should not be understood as limitation of the invention.
The present invention is described in detail with reference to the accompanying drawings and examples.
Embodiment one
As shown in Figure 1a, in the present embodiment, air inlet 7, reality are followed successively by along the tendency length direction of longwall mining working face
Body coal stope 10, air return lane 18, big width protection coal pillar stope 15, gangue concrete filled wall 20 and on
Section goaf 12 is (it should be noted that air inlet 7, entity coal stope 10 shown in Fig. 1 a, air return lane 18, big width
Degree protection coal pillar stope 15, gangue concrete filled wall 20 and upper curtate goaf 12 are worked along longwall mining
The tendency length direction in face is shown from left to right, does not imply that excavation sequence).As shown in Figure 1a, air inlet 7 is returned positioned at entity coal
The left side of mining face 10, and be arranged far from big width protection coal pillar stope 15；Air return lane 18 is located at entity coal back production
The right side of working face 10, and be located between entity coal stope 10 and big width protection coal pillar stope 15.
Wherein, as shown in Figure 1a, air inlet naturally fresh distinguished and admirable 8 is from the air inlet for being located at the left side of entity coal stope 10
Lane 7 enters, and after flowing through entity coal stope 10 from left to right, the waste air of generation is right by being located at entity coal stope 10
The air return lane 18 of side is discharged, to realize the ventilation to entity coal stope 10.
Wherein, as shown in Figure 1a, the present embodiment is using pressure system of ventilation and method of ventilation to longwall mining working face
Tail portion carries out forced ventilation, to guarantee that entity coal and big width protection coal pillar are logical with longwall mining working face tail portion when adopting
Wind provides ventilation safety guarantee for same adopt.
Specifically, as shown in Figure 1a, a kind of pressure system of ventilation of longwall mining working face tail portion includes: to be placed in air inlet
An at least booster 6 in lane 7, wherein a booster 6 is used for work, remaining booster 6 is spare；It is outstanding
The flexible air duct 14 being hung in longwall mining roadway workface, air inlet port connection are used for the booster 6 of work, go out
Longwall mining working face tail region 11 is arrived in wind port；It is placed in the tunnel infall of air inlet 7 and longwall mining working face
Scalable flexibility air duct 3, for connecting flexible air duct 14 and booster 6.
Wherein, spare booster 6 and the booster 6 of work have same ability and can be realized cuts automatically
It changes, power supply is derived from another independent current source for capableing of safety continuous power supply.6 air feed place of booster carry out lock between air and electricity and
Methane electric locking, the booster 6 of normal work is according to safety regulations in coal mine using three specially (special switch, private cable, specially
With transformer) power supply.
In addition, the present embodiment also provides a kind of forced ventilation method of longwall mining working face tail portion, comprising: will at least
One booster 6 is placed in air inlet 7, using air inlet 7 as the air feed place of booster 6；Flexible air duct 14 is hanged
It is hung in the tunnel of longwall mining working face, and the connection of its air inlet port is used for a booster 6 of work, outlet air end
Mouth arrives at longwall mining working face tail region 11, in order to make the fresh distinguished and admirable directly defeated via flexible air duct 14 of air inlet 7
It is sent to longwall mining working face tail region 11, to keep the foul atmosphere of longwall mining working face tail portion new what is directly transported
It is fresh it is distinguished and admirable under the action of be discharged through air return lane 18；Scalable flexible air duct 3 is placed in the lane of air inlet 7 and longwall mining working face
Road infall, and for connecting flexible air duct 14 and booster 6.
The air feed place of booster 6 is arranged in air inlet 7 by the present invention, meets safety regulations in coal mine, from safety sheet
Matter type angle realizes the safety of ventilation.Meanwhile the air feed place by air inlet 7 as booster 6, shorten ventilation
Route reduces inleakage, improves ventilation effect, save so as to shorten for conveying the length of distinguished and admirable flexible air duct 14
About ventilation cost.Further, booster 6 is placed on the equipment train of air inlet 7 by the present embodiment, is placed in and is set
For the booster 6 on train as the continuous propulsion of longwall mining working face is flexibly mobile, so that booster 6 be made to begin
Eventually close to longwall mining working face, as far as possible shortening vent line.
The flexible air duct 14 of the present embodiment is hung under the top beam of the hydraulic support 2 constantly promoted with longwall mining working face
Side；Specifically, as shown in Fig. 2, hydraulic support 2 includes: the top beam 21 for being used to support face roof；It is used to support top beam 21
Hydraulic vertical prop 22.Air duct is arranged when implementation, immediately below the top beam between two hydraulic vertical props to link up with, the flexible setting of air duct 14 and wind
The fixed hook that cylinder hook mutually hooks.
As shown in Figure 1a, the hydraulic support 2 of the present embodiment is laid with installation along the tendency length direction of longwall mining working face,
For to the air inlet 7 from left to right of the tendency length direction along longwall mining working face, entity coal stope 10, return air
Lane 18 and the corresponding face roof of big width protection coal pillar stope 15 carry out immediate support.Wherein, the present embodiment
The flexibility of flexible air duct 14 refers to the shape that itself is able to maintain under the action of non-external force, flexible under external force.Example
It is such as constantly promoted with working face in order to adapt to hydraulic support and moves frame, as shown in Figure 1a, positioned at the hydraulic support 2 for not moving frame and
Flexible air duct 14 between hydraulic support 2 through moving frame is bent.When implementation, flexible air duct 14 uses antistatic, fire-retardant material
Material production.
As shown in Figure 1a, the present embodiment is from left to right followed successively by air inlet along the tendency length direction of longwall mining working face
7, entity coal stope 10, air return lane 18 and big width protection coal pillar stope 15, in order to make the new of air inlet 7
It is fresh it is distinguished and admirable can be directly lasting be delivered to longwall mining working face tail region 11, flexible air duct 14 is along longwall mining working face
Tendency length direction be arranged across entire longwall mining working face, make its air inlet port as close as possible to air inlet 7 in order to even
The booster 6 positioned at air inlet 7 is connect, its outlet port is made to arrive at longwall mining working face tail region 11.
Connect for the ease of being located at the booster 6 positioned at air inlet and the flexible air duct 14 positioned at longwall mining working face
It connects, scalable flexible air duct 3 is arranged in the tunnel infall of air inlet 7 and longwall mining working face in the present embodiment, scalable soft
Property air duct 3 by wind-sock connector respectively with the booster ventilation shaft 5 of flexible air duct 14 and booster 6 seal connect
It connects, interface is avoided to leak out.When implementation, as shown in figure 4, scalable flexibility air duct 3 is by air duct fabric and encapsulates helical form therein
Support steel ring composition.Helical form support steel ring have scalability and flexibility, in order to adapt to constantly promote with working face and with
The flexible air duct 14 and booster 6 of Shi Yidong.
As shown in Figure 1a, the present embodiment is using the booster 6 being placed in air inlet 7 to longwall mining working face tail portion
The specific vent line in region 11 is as follows: when booster 6 works, fresh distinguished and admirable the 4 of booster supply successively lead to
It crosses scalable flexible air duct 3 and flexible air duct 14 is fed directly to longwall mining working face tail region 11.When the present embodiment
When 7 level of air inlet is lower than air return lane 18 (i.e. the present embodiment carries out upstriker ventilation), fresh distinguished and admirable the 4 of booster supply
It is delivered up along longwall mining working face inclined direction to longwall mining working face tail region 11.As shown in Figure 5 a, this implementation
Example has distinguished and admirable guide plate 19 in the outlet port top layout of flexible air duct 14, makes to be delivered to longwall mining working face tail region
11 it is fresh it is distinguished and admirable longwall mining working face tail region 11 is flowed down through under the forcing of distinguished and admirable guide plate 19, directly transport
It is fresh it is distinguished and admirable form working face tail portion dirt distinguished and admirable 13 when flowing through longwall mining working face tail region 11, in order to avoid working face
Tail portion dirt distinguished and admirable 13 is by entity coal stope 10, big width protection coal pillar stope 15 and air return lane 18
Entity coal stope 10 is flowed back at the communication port of tunnel, as shown in Figure 1a, the present embodiment is in entity coal stope 10, big
Air partition 16 is equipped at the tunnel communication port of width protection coal pillar stope 15 and air return lane 18, and at the communication port of tunnel
Screen is hung on hydraulic support, working face tail portion dirt distinguished and admirable 13 flows to air return lane 18 under the guidance of screen and air partition 16
After be discharged.
As shown in Figure 5 a, one end of distinguished and admirable guide plate 19 is tightly connected the outlet port of flexible air duct 14, and the other end contradicts
To the gangue concrete filled wall 20 for keeping apart upper curtate goaf 12 and this section working face.Wherein, spoil is mixed
Solidifying soil filled wall 20 can prevent the water in upper curtate goaf 12, pernicious gas from pouring in this section working face, guarantee this section
The safety of working face extraction process.When it is implemented, distinguished and admirable guide plate 19 is arc panel, and the radius of arc panel is more than or equal to soft
The radius (shown in Fig. 5 b) of property air duct 14, in order to force the fresh distinguished and admirable whole from flexible 14 outlet port of air duct to flow through length
Wall coal working face tail region 11, avoids leaking out.The outlet air end of at least part arc-shaped side of arc panel and flexible air duct 14
Mouth connection.Certainly, distinguished and admirable guide plate 19 or surface plate.When implementation, distinguished and admirable guide plate 19 can be flat with flexible air duct 14
Row setting can also favour flexible air duct 14 and (as shown in phantom in FIG.) is arranged.
Embodiment two
As shown in Figure 1 b, in the present embodiment, air return lane 18, reality are followed successively by along the tendency length direction of longwall mining working face
Body coal stope 10, air inlet 7, big width protection coal pillar stope 15, gangue concrete filled wall 20 and on
Section goaf 12 is (it should be noted that air return lane 18, entity coal stope 10 shown in Fig. 1 b, air inlet 7, big width
Degree protection coal pillar stope 15, gangue concrete filled wall 20 and upper curtate goaf 12 are worked along longwall mining
The tendency length direction in face is shown from left to right, does not imply that excavation sequence).As shown in Figure 1 b, air return lane 18 is located at entity coal
The left side of stope 10, and be arranged far from big width protection coal pillar stope 15；Air inlet 7 is located at entity coal back production
The right side of working face 10, and be located between entity coal stope 10 and big width protection coal pillar stope 15.
Wherein, as shown in Figure 1 b, air inlet naturally fresh distinguished and admirable 8 is from the air inlet for being located at the right side of entity coal stope 10
Lane 7 enters, and after flowing through entity coal stope 10 from right to left, the waste air of generation is left by being located at entity coal stope 10
The air return lane 18 of side is discharged, to realize the ventilation to entity coal stope 10.
Wherein, as shown in Figure 1 b, the present embodiment is using pressure system of ventilation and method of ventilation to longwall mining working face
Tail portion (i.e. big width protection coal pillar stope tail portion) carries out forced ventilation, to guarantee entity coal and big width protection coal
Column provides ventilation safety guarantee with longwall mining working face tail portion ventilation when adopting, for same adopt.The forced ventilation of the present embodiment
System and method of ventilation are as in the first embodiment, repeat no more.
It should be noted that as shown in Figure 1 b, the present embodiment along longwall mining working face tendency length direction from a left side to
The right side is followed successively by air return lane 18, entity coal stope 10, air inlet 7 and big width protection coal pillar stope 15, i.e., originally
The air inlet 7 of embodiment is disposed adjacent with big width protection coal pillar stope 15, therefore flexible air duct 14 is along longwall mining
The tendency length direction of working face is only arranged across big width protection coal pillar stope 15, can make its air inlet port as far as possible
Close to air inlet 7 in order to connect the booster 6 for being located at air inlet 7, and its outlet port is made to arrive at longwall mining work
Face tail region 11.The length of the present embodiment flexibility air duct 14 is short compared with embodiment one, with booster 6 and hydraulic support 2
Connection it is same
Embodiment one.
As shown in Figure 1 b, the present embodiment is using the booster 6 being placed in air inlet 7 to longwall mining working face tail portion
The specific vent line in region 11 is as follows: when booster 6 works, fresh distinguished and admirable the 4 of booster supply successively lead to
It crosses scalable flexible air duct 3 and flexible air duct 14 is fed directly to longwall mining working face tail region 11.When the present embodiment
Air inlet 7 and air return lane 18 be on close level (i.e. the present embodiment carries out downstriker ventilation) when, the fresh wind of booster supply
Stream 4 is fed directly to longwall mining working face tail region 11 along big width protection coal pillar stope.As shown in Figure 6 a, originally
Embodiment is disposed with distinguished and admirable guide plate 19 in the outlet port bottom of flexible air duct 14, makes to be delivered to longwall mining working face tail portion
Region 11 it is fresh it is distinguished and admirable flow through longwall mining working face tail region 11 upwards under the forcing of distinguished and admirable guide plate 19, directly it is defeated
That send fresh distinguished and admirable forms working face tail portion dirt distinguished and admirable 13, working face tail portion when flowing through longwall mining working face tail region 11
Dirt distinguished and admirable 13 is discharged after flowing to air return lane 18 via entity coal stope 10.
As shown in figure 6 a and 6b, the distinguished and admirable guide plate 19 of the present embodiment and the distinguished and admirable guide plate 19 of embodiment one and flexible air duct
14 link position is different, and structure is identical, repeats no more.
Although above-mentioned elaborate the present invention, however, the present invention is not limited thereto, those skilled in the art can
It is modified with principle according to the present invention, therefore, the various modifications that all principles according to the invention carry out all should be understood as
Fall into protection scope of the present invention.
Claims (9)
1. a kind of forced ventilation method of longwall mining working face tail portion, the longwall mining working face includes: that entity coal is returned
Mining face and big width protection coal pillar stope, longwall mining working face tail portion, that is, big width protection coal pillar back production
Working face tail portion characterized by comprising
An at least booster is placed on the equipment train of air inlet；
Flexible air duct is hung in the tunnel of the longwall mining working face, and makes the air inlet port connection of the flexible air duct
One booster, outlet port arrives at longwall mining working face tail portion, in order to make the fresh wind of air inlet
It flows through and longwall mining working face tail portion is delivered directly to by flexible air duct, to make the foul atmosphere of longwall mining working face tail portion
Directly transport it is fresh distinguished and admirable under the action of be discharged through air return lane；
Scalable flexible air duct is placed in the tunnel infall of air inlet and longwall mining working face, for connecting the flexible wind
Cylinder and booster.
2. the forced ventilation method of longwall mining working face according to claim 1 tail portion, which is characterized in that described to make
The foul atmosphere of longwall mining working face tail portion directly transport it is fresh distinguished and admirable under the action of through air return lane discharge include:
Distinguished and admirable guide plate is arranged in the outlet port of the flexible air duct, and is tightly connected one end of the distinguished and admirable guide plate
The outlet port of the flexibility air duct, the other end are contradicted to the cash for keeping apart upper curtate goaf and this section working face
Stone concrete filled wall, so that force from flexible air duct outlet port fresh distinguished and admirable flows through longwall mining working face tail portion
It is discharged by air return lane.
3. the forced ventilation method of longwall mining working face according to claim 2 tail portion, which is characterized in that described soft
Property air duct hang below the top beam between two hydraulic vertical prop of hydraulic support constantly promoted with the longwall mining working face；
Wherein, the hydraulic support along the longwall mining working face tendency length direction be laid with installation, for it is described into
Air way, entity coal stope, air return lane and the corresponding face roof of big width protection coal pillar stope carry out and
When supporting.
4. the forced ventilation method of longwall mining working face according to claim 3 tail portion, which is characterized in that when along
The tendency length direction of longwall mining working face is followed successively by the air inlet, entity coal stope, air return lane and big width
When protection coal pillar stope, the flexibility air duct is grown along the tendency length direction of the longwall mining working face across entire
The setting of wall coal working face, and the top of the flexible air duct outlet port is arranged in the distinguished and admirable guide plate, in order to make
Fresh distinguished and admirable flow through is discharged behind longwall mining working face tail portion by air return lane.
5. the forced ventilation method of longwall mining working face according to claim 4 tail portion, which is characterized in that described time
Air way and entity coal stope, big width protection coal pillar stope tunnel communication port at be equipped with air partition, and in institute
It states and hangs with screen on the hydraulic support at the communication port of tunnel, for being directed to flow past the dirt formed behind longwall mining working face tail portion
It is discharged after turbid distinguished and admirable inflow air return lane.
6. the forced ventilation method of longwall mining working face according to claim 3 tail portion, which is characterized in that when along
The tendency length direction of longwall mining working face is followed successively by the air return lane, entity coal stope, air inlet and big width
When protection coal pillar stope, it is described flexibility air duct along the longwall mining working face tendency length direction across big width
The setting of protection coal pillar stope, and the bottom of the flexible air duct outlet port is arranged in the distinguished and admirable guide plate, with
Convenient for making fresh distinguished and admirable flow through after entire longwall mining working face through being discharged by air return lane.
7. the forced ventilation method of longwall mining working face according to claim 5 or 6 tail portion, which is characterized in that institute
It states the top beam between two hydraulic vertical props of hydraulic support and is arranged right below air duct hook, the flexibility air duct is equipped with and the air duct
Link up with the fixed hook mutually hooked.
8. a kind of pressure system of ventilation of longwall mining working face tail portion, the longwall mining working face includes: that entity coal is returned
Mining face and big width protection coal pillar stope, longwall mining working face tail portion, that is, big width protection coal pillar back production
Working face tail portion characterized by comprising
At least booster being placed on the equipment train of air inlet；
The flexible air duct in the tunnel of the longwall mining working face is hung on, air inlet port connects a local ventilation
Machine, outlet port arrives at longwall mining working face tail portion, in order to make the fresh distinguished and admirable via flexible air duct of air inlet
It is delivered directly to longwall mining working face tail portion, to keep the foul atmosphere of longwall mining working face tail portion new what is directly transported
It is fresh it is distinguished and admirable under the action of be discharged through air return lane；
It is placed in the scalable flexible air duct of the tunnel infall of air inlet and longwall mining working face, for connecting the flexible wind
Cylinder and booster.
9. the pressure system of ventilation of longwall mining working face according to claim 8 tail portion, which is characterized in that described soft
The outlet port of property air duct is disposed with distinguished and admirable guide plate；And one end of the distinguished and admirable guide plate is tightly connected the flexible air duct
Outlet port, the other end contradicts to the gangue concrete for keeping apart upper curtate goaf and this section working face and fills
Wall.
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| CN109538275B (en) | 2020-08-04 |
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