CN108316963A - Underground coal mine explosion protection system - Google Patents
Underground coal mine explosion protection system Download PDFInfo
- Publication number
- CN108316963A CN108316963A CN201810172394.7A CN201810172394A CN108316963A CN 108316963 A CN108316963 A CN 108316963A CN 201810172394 A CN201810172394 A CN 201810172394A CN 108316963 A CN108316963 A CN 108316963A
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- Prior art keywords
- fire resistant
- resistant doorsets
- branch pipe
- coal mine
- underground coal
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/08—Rock dusting of mines; Depositing other protective substances
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
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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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a kind of underground coal mine explosion protection systems,Multiple fire resistant doorsets (10.2) are arranged in interval on main exhaust (10),Main exhaust (10) is separated into multistage by multiple fire resistant doorsets (10.2),Wherein any one section includes the gas concentration sensor (10.1) on the right side of being located at fire resistant doorsets (10.2) and the temperature sensor (10.4) on the left of fire resistant doorsets (10.2) and pressure sensor (10.5),On the left of fire resistant doorsets (10.2) duster (10.7) is provided at fire resistant doorsets (10.2),Exhaust duct (10) on the right side of fire resistant doorsets (10.2) is connected by branch pipe (10.9) with main air inlet pipe (6.9),The electrically operated valve (10.8) opening/closing for controlling branch pipe (10.9) is provided on branch pipe (10.9).The present invention can effectively prevent the generation that fire damp explodes.
Description
Technical field
The invention belongs to coal field, more particularly to a kind of underground coal mine explosion protection system.
Background technology
Coal is that the important industry of the industries such as main energy sources in Mineral Resources in China, and electric power, steel, chemical industry is former
Material has very important strategic position in the development of the national economy.According to statistics, coal accounts for the disposable energy-consuming in China
75% or more, along with the energy crisis in the whole world, status of the coal as the main energy sources in China is difficult to for quite a long time
Change.Since the reliability and automatization level that work condition environment is severe and digging is equipped are low, coal production still falls within high-risk row
Industry.The accidents such as coal mine gas from explosion, rock stratum collapse, gushing water happen occasionally.
In the prior art, on the one hand the generation of gas explosion accident in order to prevent can arrange multiple gas monitors in underground
Sensor sends out alarm after detecting that gas density is exceeded, on the other hand, by main exhaust or tunnel by fire damp
A large amount of inflammable methane gas and air can be sucked outside pump drainage to well, when due to pump drainage blower fan work from fully mechanized mining work surface, and is led
Exhaust pipe due to being set to underground, diameter generally cannot excessive (generally not super 100cm), easily cause in main exhaust in this way
Gas density is exceeded, causes gas explosion in pipe (pipe explosion accident occurs), then causes on a large scale into lower fire.
Invention content
In view of the drawbacks of the prior art, the present invention provides a kind of underground coal mine explosion protection systems.
A kind of underground coal mine explosion protection system, multiple fire resistant doorsets 10.2 are arranged in interval on main exhaust 10, by multiple anti-
Main exhaust 10 is separated into multistage by vent 10.2, wherein any one section includes the gas density biography for being located at 10.2 right side of fire resistant doorsets
Sensor 10.1 and the temperature sensor 10.4 on the left of fire resistant doorsets 10.2 and pressure sensor 10.5, in 10.2 left side of fire resistant doorsets
It is provided with duster 10.7 at fire resistant doorsets 10.2, the exhaust duct 10 for being located at 10.2 right side of fire resistant doorsets passes through branch pipe 10.9 and master
Air inlet pipe 6.9 is connected, and the electrically operated valve 10.8 opening/closing for controlling branch pipe 10.9 is provided on branch pipe 10.9.
Optionally, multiple spray heads 10.6 are set at every section；Gas concentration sensor 10.1, fire resistant doorsets 10.2, temperature pass
Sensor 10.4, pressure sensor 10.5, spray head 10.6, duster 10.7 and electrically operated valve 10.8 with controller 10.3
It is connected.
The beneficial effects of the invention are as follows：Main ventilation pipeline is separated into multistage by fire resistant doorsets, accident can be limited to
In smaller range, the generation of a wide range of gas explosion is prevented；Flame can be effectively prevent to anti-close to fire resistant doorsets setting duster
It is propagated at vent, improves fire resistant doorsets barriering effect；Main air inlet pipe is connected to main exhaust by branch pipe, so as to adjust master
Gas density in exhaust pipe；Whole system uses automation control, can be monitored in real time to main exhaust situation.
Description of the drawings
Fig. 1 is coal mining system overall structure diagram；
Fig. 2 is explosion protection system schematic diagram；
Fig. 3 is the structural schematic diagram of firedamp taking-out discharging drilling；
Fig. 4 A are the structural schematic diagrams of tunnel support device；
Fig. 4 B are the construction drawings of tunnel support device；
Fig. 5 A are the structural schematic diagrams of coalcutter；
Fig. 5 B are the portions A enlarged drawings in Fig. 4 A；
Fig. 6 is the layout drawing of dust-extraction unit；
Fig. 7 is the structural schematic diagram of dust-extraction unit；
Fig. 8 A are the first schematic diagrames of rotating shaft sealing structure；
Fig. 8 B are the second schematic diagrames of rotating shaft sealing structure；
Fig. 8 C are the third schematic diagrames of rotating shaft sealing structure.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail, make that the above and other purpose of the present invention, feature and advantage will be more clear.Complete
Identical reference numeral indicates identical part in portion's attached drawing.Not deliberately attached drawing drawn to scale, it is preferred that emphasis is show this hair
Bright purport.
Fig. 1 is combined first, and whole introduction is done to the coal mining system of the present invention.Coal mining is carried out in tunnel 2, and tunnel 2 is prolonged
Fully mechanized mining work surface is extended to, coalcutter 6 is located at fully mechanized mining work surface, fully mechanized mining operation is realized by coalcutter, at fully mechanized mining work surface
It is additionally provided with dust-extraction unit 8 and belt conveyor 7.Tunnel 2 is supported by multiple support devices 5, and support device 5 is along tunnel length
Direction arranges, and support device 5 is supported between the top 1 in tunnel 2 and bottom 4, by 5 roof supporting of support device and bottom plate, thus
Prevent tunnel from caving in.Be additionally provided with more roof and floor deformation measuring devices 3 in tunnel 2, for example, along tunnel length direction every
A piece roof and floor deformation measuring device 3 of 100 meters of settings, top plate or bottom plate can be measured by roof and floor deformation measuring device 3
Deflection, when deflection is greater than the set value, prompts the measuring device nearby to have so as to be measured to roadway deformation amount
The possibility of landslide, needs maintenance personnel to handle in time, and firedamp taking-out discharging drilling 9 is dug in the fissure zone on tunnel 2.
As shown in Fig. 2, the present invention does following processing to underground main exhaust 10, interval setting is multiple on main exhaust 10
Main exhaust 10 is separated into multistage by fire resistant doorsets 10.2 by multiple fire resistant doorsets 10.2, is about 500m or so per segment length, figure
7 be wherein any one section of configuration comprising is located at the gas concentration sensor on 10.2 right side (i.e. air-flow approaching side) of fire resistant doorsets
10.1 and temperature sensor 10.4 and pressure sensor 10.5 positioned at the left side of fire resistant doorsets 10.2, it is close in 10.2 left side of fire resistant doorsets
Duster 10.7 is provided at fire resistant doorsets 10.2, the exhaust duct 10 for being located at 10.2 right side of fire resistant doorsets passes through branch pipe 10.9 and main air inlet
Pipe 6.9 is connected, and the electrically operated valve 10.8 opening/closing for controlling branch pipe is provided on branch pipe 10.9.In addition to this it is possible to
Every section is arranged multiple spray heads 10.6.
Gas concentration sensor 10.1, fire resistant doorsets 10.2, temperature sensor 10.4, pressure sensor 10.5, spray head
10.6, duster 10.7 and electrically operated valve 10.8 are connected with controller 10.3, and gas concentration sensor 10.1, temperature pass
The gas density detected, pipe temperature, pressure are sent to controller 10.3 by sensor 10.4, pressure sensor 10.5, control
Device controls fire resistant doorsets 10.2, spray head 10.6, duster 10.7 and electrically operated valve 10.8 according to testing result.Specifically,
Under normal circumstances, fire resistant doorsets 10.2 are in the open state, and electrically operated valve 10.8 is closed, between main air inlet pipe 6.9 and exhaust pipe 10
It is not connected to, when gas concentration sensor 10.1 detects that gas density is excessively high in main exhaust 10, controller 10.3 drives electricity
Movable valve 10.8 is opened, and main air inlet pipe 6.9 is connected to main exhaust 10, and the fresh air in main air inlet pipe 6.9 enters main exhaust 10
In, to reduce gas density in main exhaust 10；If temperature sensor 10.4 or pressure sensor 10.5 detect warm in pipe
Temperature is higher than normal work maximum pressure higher than 2 times of normal work maximum temperature or pressure in degree, pressure anomaly, such as pipeline
2-4 times, then controller 10.3 judgement occur gas explosion, then send out signal control electrically operated valve 10.8, fire resistant doorsets 10.2 close
It closes, opens spray head 10.6 and duster 10.7, fire resistant doorsets 10.2 are arranged close to due to duster 10.7, it in this way can be effective
Prevent flame to propagation at fire resistant doorsets 10.2, to efficiently accomplish the process of entire explosion arrestment；It is set by the compartment of fire resistant doorsets 10.2
Accident, can be limited in smaller range, prevent the generation of a wide range of gas explosion by meter.
In the present invention, as shown in figure 3, carrying out gas pumping using the method for firedamp taking-out discharging drilling 9 is dug in fissure zone
It puts.Drilling 9 includes the first inclined drill 9.1 extended obliquely from ground, the horizontal horizontal drilling dug in fissure zone 9.6
9.2, and extend downward by fissure zone 9.6 second inclined borehole 9.4 of fully mechanized mining work surface, it is the first inclined drill 9.1, horizontal
Drilling 9.2 and the second inclined borehole 9.4 are sequentially connected, and wind turbine 9.5 is equipped in the end of the second inclined borehole 9.4, tiltedly second
Non-return valve 9.3 is set in drilling 9.4.In working face mining process, poured on the methane gas in target coal seam into horizontal brill
In hole 9.2, due to the presence of non-return valve 9.3, the methane gas in horizontal drilling 9.2 will not enter fully mechanized mining work surface, in wind turbine
Under the action of 9.5, the methane gas in horizontal drilling 9.2 is discharged from the first inclined drill 9.1.
In work progress, implement 9.1 well of the first inclined drill on ground first, which creeps into fissure zone 9.6,
It is used in combination well cementing of cement, cementing concrete to return to ground；First inclined drill, 9.1 well horizontal drilling is docked with opposite bore completion, into
Row horizontal drilling completes horizontal drilling 9.2, about to stopping at fully mechanized mining work surface；From the fully mechanized mining work surface in tunnel 2 obliquely
The drilling for carrying out the second inclined borehole 9.4, until being got through with horizontal drilling 9.2；Wind turbine 9.5 and non-return valve 9.3 are installed.
Entire the first inclined drill of work progress 9.1 is completed with horizontal drilling 9.2 by surface drilling equipment, and the second inclined borehole 9.4 is from well
It spuds in lower tunnel, this form of construction work can be carried out at the same time with underground on well, short time limit, simultaneously as the second inclined borehole 9.4
It need not spud in from ground, drilling direction need not be varied multiple times in surface drilling equipment (drill bit), greatly reduce difficulty of construction；It is adopting
In coal operation, horizontal drilling 9.2 and the second inclined borehole 9.4 can together promote, operating efficiency with the propulsion of fully mechanized mining work surface
It is high；Since underworkings 2 and the vertical range of fissure zone 9.6 are shorter, the length of such second inclined borehole 9.4 can subtract significantly
It is few, it is at low cost.
In the prior art, tunnel support device generally uses single column or more upright supports top plates or bottom plate, with double columns
Support phase is opposed to for tunnel, is generally oppositely arranged two root posts in tunnel both sides, top plate is laid on column top, and bottom plate is laid on
Below column, two columns form one group of support construction, and multigroup support construction extends along tunnel length direction side by side, to realize
Support to tunnel.This support construction in the prior art, between each group support construction independently of each other, multigroup support construction does not have
Form an entirety, stability is poor, and in the support construction, column is located at tunnel both sides, and practical tunnel inner top panel or bottom plate by
The maximum position of power is the middle part of top plate or bottom plate, this support construction, and top plate easily fractures from centre, collapses to which tunnel occur
It collapses.Fig. 4 A are the structural schematic diagram of support device 5 of the present invention.Support device 5 includes left support arm 5.2, right support
Arm 5.7, left hydraulic prop 5.3 and right hydraulic prop 5.5.Left support arm 5.2 and the bottom of right support arm 5.7 pass through lower bearing pin
5.4 is hinged, and left hydraulic prop 5.3 is supported in the outside of left support arm 5.2, and right hydraulic prop 5.5 is supported in right support
The outside of arm 5.7, left support arm 5.2 and right support arm 5.7 are V-shaped, and top plate 5.1 is laid on left support arm 5.2 and right support arm 5.7
On.Multigroup support device 5 is arranged along tunnel length direction, and hole is provided on the top of left support arm 5.2 and right support arm 5.7, on
Axis pin 5.6 passes through the hole, and two groups of support devices 5 are connected together so that each group support device becomes an entirety.
As shown in Figure 4 B, can multiple rows of support device 5 be set according to the width in tunnel in tunnel, is arranged in figure 4b
Two rows of support devices 5, each spacing arranged between support device 5 and each row between the side wall of tunnel at a distance from it is roughly equal, in Fig. 4 B
In illustrated embodiment, the distance of left bank support device 5 to left side wall 5.8 is about 1.5 meters, right row's support device 5 to right side wall
5.9 distance is about 1.5 meters, and the spacing of left bank support device and right row's support device is also 1.5 meters.Further, on a left side
Being dug on side wall 5.8 has inside left groove 5.10, and inside right groove 5.11 is offered on right side wall 5.9, top plate 5.1
Left groove 5.10 is inserted into right groove 5.11 in left and right both ends respectively, is realized to top by left groove 5.10 and right groove 5.11
Additional hydraulic vertical prop may not necessarily be arranged in the left and right both ends of the support at 5.1 left and right both ends of plate, such top plate 5.1 again, significantly
Reduce the usage amount of column.
The work progress of support device 5 shown in Fig. 4 A, 4B is introduced below.In 2 digging process of tunnel, respectively on a left side
Left groove 5.10 and right groove 5.11 are cut on side wall 5.8 and right side wall 5.9, top plate 5.1 is inserted into left groove 5.10 and the right side
In groove 5.11, the left support arm 5.2 of one group of support device 5 and right support arm 5.7 are launched into V-shaped later, adjusted separately
Left hydraulic prop 5.3 and right hydraulic prop 5.5 so that left support arm 5.2 pushes against top plate 5.1 with right support arm 5.7, later will be upper
Axis pin 5.6 passes through the hole on this group of 5 left support arm 5.2 of support device or right support arm 5.7, and connects with upper one group of support device 5
It picks up and, after which is provided with, next row support device 5 can be installed with identical method.In the present invention,
Left support arm 5.2, right support arm 5.7 and the top plate 5.1 of support device 5 constitute a stable triangle, left support arm
5.2, one firm triangle of left hydraulic prop 5.3 and bottom plate (or pedestal) composition, equally, right hydraulic prop 5.5, right support
Arm 5.7 and bottom plate (or pedestal) also form a firm triangle, while by upper pin 5.6 so that each group support device 5
An entirety is connected into, support device 5 is not susceptible to topple over, and stability is good, relative to single column supporting structural, support device
5 structural strength greatly reinforces, and is unlikely to deform, and compressive resistance is strong；In work progress, support device 5 is uniformly divided along top plate 5.1
Cloth strengthens the support to 5.1 intermediate position of top plate, top plate 5.1 can be effectively prevent to fracture from centre, it is ingenious excavated it is left recessed
Slot 5.10 and right groove 5.11, may not necessarily be arranged additional side hydraulic vertical prop, greatly reduce the use of column again in this way
Amount.
Coalcutter 6 is located at fully mechanized mining work surface, is main coal-cutting machinery.As shown in Figure 5A, coalcutter 6 includes top
The walking basal seat 6.3 of protective plate 6.1 and bottom installs organism 6.2 on pedestal 6.3, and protective plate 6.1 is by being located on pedestal 6.3
Support device 6.4 support, support device 6.4 and 5 structure having the same of support device differ only in support device 6.4
It is installed on pedestal 6.3 and is used to support protective plate 6.1, and support device 5 is installed in tunnel 2, is used to support top plate 5.1, it is right
It will be further described in detail in following support devices 5 in the structure of support device 6.4.Drive is provided in body 6.2
The front end of dynamic motor, central processing unit, communication device etc., body 6.2 is equipped with preceding inertial navigation 6.15, and rear end is equipped with rear inertial navigation 6.14,
Velocity sensor 6.16 is installed on pedestal 6.3.Body 6.2 is connected by cutting arm 6.5 with roller 6.7, is pacified on roller 6.7
Equipped with pick, roller 6.7 is installed on by shaft 6.6 on cutting arm 6.5.Water main 6.8 passes through protective plate with main air inlet pipe 6.9
6.1 to 6.7 top of roller.
Preceding inertial navigation 6.15, rear inertial navigation 6.14 and velocity sensor 6.16 be connected with central processing unit, central processing unit
According to preceding inertial navigation 6.15, the detected value of rear inertial navigation 6.14 and velocity sensor 6.16, complete coalcutter attitude algorithm.Due to
The relative distance of former and later two inertial navigations is fixed value, therefore, can improve double inertial navigation positioning accuracies in this, as constraints.
S10：Its position coordinates is input to central processing unit by preceding inertial navigation 6.15 and rear inertial navigation 6.14, central processing unit according to
Dead reckoning calculates the position coordinates of forward and backward inertial navigation；
Wherein subscript k-1, k indicates k-1 moment and k moment respectively；N, E, U are respectively inertial navigation north, east, day direction position seat
Mark；V is the velocity amplitude that velocity sensor 6.16 exports；T is the sampling period:θ is respectively course angle and the pitching of inertial navigation output
Angle.
S20：According to dead reckoning, positioning equation can be abbreviated as：
Wherein, quantity of state X=[N1 El U1 N2 E2 U2]T, N1 El U1 are respectively preceding 6.15 north of inertial navigation, east, old name for the Arabian countries in the Middle East
To position coordinates, N2, E2, U2 are respectively rear 6.14 north of inertial navigation, east, day direction position coordinates；W is state-noise；It is positioned with this
State equation of the equation as extended Kalman filter.
S30：Relative distance derives extended Kalman filter amount as the constraints of fixed value after being installed using two inertial navigations
Survey equation；Note fixed value is r, meets following relational expression:
Above formula can be abbreviated as Zk=h (Xk)+Vk, the wherein subscript k expression k moment；Measurement Z=[r]；V is to measure noise；
Using this equation as the measurement equation of extended Kalman filter.
S40：Extended Kalman filter output is the position coordinates in 6.14 north of preceding inertial navigation 6.15 and rear inertial navigation, east, day, will
Positioning result of the position coordinates of preceding inertial navigation 6.15 as coalcutter.
The more inertial navigation localization methods of coalcutter provided by the invention are pacified using 6.14 two inertial navigations of preceding inertial navigation 6.15 and rear inertial navigation
Relative distance is the constraints of fixed value after dress, calibrates high-cost preceding inertial navigation 6.15 with the rear inertial navigation 6.14 of low cost, reaches
To high accuracy positioning, it is made to meet requirement of the underground coal mine for coalcutter positioning accuracy, to realize that fully-mechanized mining working is intelligent
It lays a good foundation.
Refering to Fig. 5 B, the top of protective plate 6.1 is provided with detection device 6.10, detection device 6.10 for example may include
Methane Concentration Measurement device, oxygen concentration detector, temperature sensor, gas concentration lwevel detector etc..The top of protective plate 6.1
Cover board 6.11 with stretching forms the accommodation space for accommodating detection device 6.10 between cover board 6.11 and water main 6.8,
Water main 6.8 is close at the back of detection device 6.10, in this way can utilize water main 6.8 be detection device cooling, it is not necessary to again for
Additional cooling system is arranged in it, and cover board 6.11 plays protective action to detection device, can prevent the ickings fallen damage inspection
Survey device.Main air inlet pipe 6.9 is located at the lower section of water main 6.8, and the end of main air inlet pipe 6.9 and water main 6.8 stretches out in anti-
Except backplate 6.1, the end of main air inlet pipe 6.9 and water main 6.8 extends substantially to the top of roller 6.7.Water main 6.8 is sprayed
The water mist gone out is shrouded on roller 6.7, to reduce the coal dust of fully mechanized mining work surface.The end of main air inlet pipe 6.9 is provided with more
A nozzle 6.12, Open Side Down for nozzle 6.12, and the fresh air entered from main air inlet pipe 6.9 is sprayed downwards by nozzle 6.12, due to
Nozzle 6.12 is located substantially at the top of roller 6.7 in this way, can blow coal dust caused by roller 6.7 downwards, can be into one
The pollution caused by coal dust of step inhibited at fully mechanized mining work surface.Further, the is provided at nozzle 6.12 in main air inlet pipe 6.9
One anion generator 6.13, by the first anion generator 6.13 so that containing a large amount of anion, anion in fresh air
It is blown into fully mechanized mining work surface through nozzle 6.12.Due to containing a large amount of anions in fresh air, at such fully mechanized mining work surface in equipment
Electrostatic can be neutralized by anion, and so as to greatly reduce the generation of electrostatic at fully mechanized mining work surface, reduction is caused by electrostatic
Fire or explosion accident.
As a shown in Figure 6, dust-extraction unit 8 is located at the front of coalcutter 6, and dust-extraction unit 8 is for taking away at coal mining activity face
Coal dust, gas, waste and old air etc..Dust-extraction unit 8 is placed on the bottom 4 in tunnel 2, can place more dust-extraction units 8, figure
It placed two dust-extraction units 8 in 6, belt conveyor 7 is located between two dust-extraction units 8, and belt conveyor 7 is located substantially at roller
6.7 lower section, belt conveyor 7 can fall into belt conveyor 7 by the coal under 6.7 cuttings of roller in this way by 7.1 support of carrying roller
On, it is transported by belt conveyor 7.Spacing between dust-extraction unit 8 and belt conveyor 7 is about 50cm-150cm, refering to Fig. 7, is removed
The advantages of opening 8.1 of dirt device 8 is located at the side-lower of belt conveyor 7, this arrangement is, defeated during coal mining
Send the dust at belt 7 and roller 6.7 maximum, it, on the one hand can be with by 8.1 side-lowers for being set to belt conveyor 7 that will be open
The coal under cutting is avoided to fall into opening 8.1, on the other hand, since opening 8.1 is located at the lower section of belt conveyor 7 close to skin
Band, the coal dust on belt conveyor 7 can be taken away through dust-extraction unit 8 from opening 8.1, and coal dust is effectively reduced.
The concrete structure of dust-extraction unit 8 is further described in detail with reference to Fig. 7.Dust-extraction unit 8 has loudspeaker
The opening 8.1 of shape, opening 8.1 gradually taper up downwards, are connected with one end of cylinder 8.2 by pipeline, and the other end of cylinder 8.2 connects
Run in wind pipeline, and exhaust blower 8.6 is provided in exhaust duct, and the second anion is provided between exhaust blower 8.6 and cylinder 8.2
Generator 8.7.The top of cylinder 8.2 is equipped with shower tray 8.8, and shower tray 8.8 is connected with water main 6.8, at the bottom of cylinder 8.2
Portion is equipped with strainer 8.3, sewage collecting pool is formed in the cylinder 8.2 of 8.3 lower part of strainer, sewage collecting pool is through filter 8.4
It is connected with circulating pump 8.5, circulating pump 8.5 connects water main 6.8.
Exhaust blower 8.6 is opened, coal dust, gas, waste and old air at fully mechanized mining work surface etc. enter cylinder 8.2 through opening 8.1
In, shower tray 8.8 carries out spraying and dedusting, and coal slime is filtered by strainer 8.3 caused by dedusting, is stayed in cylinder 8.2, and sewage is through filter
Net 8.3 enters sewage collecting pool, and after the sewage in sewage collecting pool is filtered by filter 8.4, main water is sent back to by circulating pump 8.5
Pipe 6.8 realizes recycling for water, greatly reduces dust removing down-hole water consumption.Since underground coal dust is larger, exhaust blower 8.6
When rotating at high speed, fan blade will produce friction with coal dust, cause to gather electrostatic on fan blade, and fire or the methane gas that ignites occurs.
The present invention is provided with the second anion generator 8.7 before exhaust blower 8.6 thus, produced by the second anion generator 8.7
Anion can neutralize the electrostatic on 8.6 fan blade of exhaust blower, avoid accident.
Refering to Fig. 5 A, coalcutter 6 is connected by cutting arm 6.5 with roller 6.7, and pick, roller are equipped on roller 6.7
6.7 are installed on by shaft 6.6 on cutting arm 6.5.Shaft 6.6 stretches out in except cutting arm 6.5, roller 6.7 and cutting arm 6.5
Except shaft 6.6 be fixedly connected, i.e., roller 6.7 does not rotate relative to shaft 6.6, is driven by the rotation of shaft 6.6
Roller 6.7 rotates, and the pick on roller 6.7 cuts coal seam, to complete coal mining activity.Shaft 6.6 is relative to cutting
The shell high speed rotation of arm 6.5 is equipped with reduction gearing in 6.5 shell of cutting arm, and coal dust is very big when due to underground work, coal
Dirt can enter enclosure interior from the gap between shaft 6.6 and shell, be damaged to internal gear and shaft 6.6, in repair,
It needs all to dismantle the shell of cutting arm 6.5, the replacement to sealing structure could be completed, maintenance time is long, heavy workload；For
This, devises a variety of rotating shaft sealing structures in the prior art, these sealing structures are generally disposed in shell, and sealing structure passes through
Oil lubrication, lubricating oil can be oozed out from the gap between shaft and shell, adsorbed coal dust, caused coal dust heap at rotating shaft sealing
Product, rotating shaft sealing structure reduced service life.
As shown in Fig. 8 A, 8B, 8C, sealing structure is made of the rotating shaft sealing structure of the present invention inside and outside two parts, external
Sealing shroud 6.61 is located at except the shell 6.62 of cutting arm 6.5, and two sawtooth pressing plates 6.65 are internally provided in shell 6.62, saw
The whole semicircular in shape of tooth support 6.65, two sawtooth pressing plates 6.65 are opposite to be fastened in shaft 6.6, in two adjacent teeth 6.67
Between fill airtight and watertight padding 6.63, further, airtight and watertight padding 6.63 can pass through oil immersion handle, offered at the top of tooth 6.67
The groove for accommodating stationary seal ring 6.69, can open up groove at the top of each tooth 6.67, can be arranged so multiple quiet close
Seal ring 6.69, it is multiple-sealed to be formed so that sealing effect is more preferable.In order to reduce internal seal structure countershaft 6.6
Abrasion can be arranged axle sleeve 6.68 outside shaft 6.68, and stationary seal ring 6.69 is placed on axle sleeve 6.68, will be sawed by cover board 6.64
Tooth support 6.65 compresses, and cover board 6.64 can be fixed on for example, by bolt etc. between shell 6.62 and support plate 6.66.
When internal seal structure is installed, axle sleeve 6.68 is placed in shaft 6.6, stationary seal ring 6.69 is placed on axle sleeve later
On 6.68, the position of stationary seal ring 6.69 and the top groove of tooth 6.67 are corresponding, later by 6.63 consolidation of the airtight and watertight padding of oil immersion
It is filled between each tooth 6.67, is later compressed sawtooth pressing plate 6.65 by cover board 6.64, cover board 6.64 is fixed on support plate
On 6.66, just installation is complete for internal seal structure.The internal seal structure of the present invention, is made by the design of zigzag pressing plate,
Airtight and watertight padding is by mutually separated fixation, so as to avoid winding and caking occur between airtight and watertight padding；Pass through the groove pair of tooth top
Stationary seal ring carries out limit compression, can effectively prevent mobile stationary seal ring, deformation, damage, while can facilitate at each tooth top
Setting stationary seal ring, consequently facilitating realization is multiple-sealed, the semicircle that sawtooth pressing plate 6.65 is fastened by two forms, dismounting side
Just, it is conveniently replaceable internal airtight and watertight padding, it is easy to maintain.
External sealing shroud 6.61 is made of rubber or plastics, is also to be snapped together to be formed by two semicircles, figure
8C is the vertical view of one of semi-circular structure, and sealing shroud 6.61 is substantially in infundibulate, has the side 6.614 turned up, turns up
It is provided with the hole passed through for screw rod on side, sealing shroud 6.61 can be fixed on shell 6.62 by the hole using screw rod,
The ontology 6.613 of sealing shroud 6.61 is vertically arranged relative to side 6.614, and body interior forms the accommodation space for accommodating shaft 6.6
6.612, it is provided with multiple rows of deformable lip 6.615 on the inner wall of accommodation space 6.612, spacing d2 between lip 6.615
It is slightly less than the diameter of shaft 6.6, it is preferred that the small 1mm-3mm of diameter relative to shaft 6.6, in this way when sealing shroud 6.61 is placed on
After in shaft 6.6, lip 6.615 is slightly deformed, and lip 6.615 can be tightly attached to 6.6 outer surface of shaft, before ontology 6.613
End 6.611 gradually tapers up to form the opening that shaft 6.6 is pierced by, and the diameter d1 of the opening is identical as the diameter of shaft 6.6.Further
, for the ease of manufacturing and replacing sealing shroud 6.61, side 6.614, ontology 6.613, front end 6.611 and lip 6.615 pass through
Molding is integrally formed.In use, the sealing shroud 6.61 of two semicircles is fastened in shaft 6.6, side 6.614 is consolidated by screw rod
Due on shell 6.62.
The present invention is provided with inside and outside two sealing structures, by between external sealing structure countershaft 6.6 and shell 6.62
Gap covered, lip 6.615 is that shaft 6.6 provides multiple tracks protection, and the distressed structure of lip 6.615 makes lip
6.615 can also be kept when shaft 6.6 rotates with the close contact of shaft 6.6, good airproof performance, external sealing structure can be with
Prevent most coal dust from entering or being piled up at gap, while outer seal structure is designed to easily replace structure, it can be outside
When part sealing structure damages when poorly sealed lip 6.615 (such as the perforation of ontology 6.613 or), in time by external sealing shroud 6.61
It replaces, internal seal structure is replaced without dismantling shell 6.62.Internal seal structure uses the longevity with longer
Life, the design of sawtooth pressing plate, groove, sealing ring make coal dust cannot be introduced into inside shell 6.62.
In the actual production of underground, when being sealed using traditional bearing seal ring, the maintenance intervals of sealing structure
About 4-6 months；When using only the internal seal structure of the present invention, the maintenance intervals of sealing structure are about 12-15
Month；Using the inner sealing of the present invention when outside seals the sealing structure being combined, the maintenance cycle of internal seal structure is big
The replacement cycle of about 3-5, outer seal structure are about 6 months or so.It is possible thereby to find, pass through interior outer seal configuration
Use, the maintenance cycle of shaft can be greatly prolonged, avoid the damage of rotating shaft sealing structure, during coalcutter use,
Maintenance load can be greatly reduced without dismantling shell by only needing to change outer seal structure, shorten maintenance time.
Many details are elaborated in the above description in order to fully understand the present invention.But above description is only
Presently preferred embodiments of the present invention, the invention can be embodied in many other ways as described herein, therefore this
Invention is not limited by specific implementation disclosed above.Any those skilled in the art are not departing from the technology of the present invention simultaneously
In the case of aspects, all technical solution of the present invention is made using the methods and technical content of the disclosure above many possible
Changes and modifications, or it is revised as the equivalent embodiment of equivalent variations.Every content without departing from technical solution of the present invention, according to this
The technical spirit any simple modifications, equivalents, and modifications made to the above embodiment of invention, still fall within skill of the present invention
In the range of the protection of art scheme.
Claims (3)
1. a kind of underground coal mine explosion protection system, which is characterized in that multiple fire resistant doorsets are arranged in interval on main exhaust (10)
(10.2), main exhaust (10) is separated into multistage by multiple fire resistant doorsets (10.2), wherein any one section includes being located at fire prevention
Gas concentration sensor (10.1) on the right side of door (10.2) and the temperature sensor (10.4) on the left of the fire resistant doorsets (10.2) with
Pressure sensor (10.5) is provided with duster (10.7) at fire resistant doorsets (10.2) on the left of fire resistant doorsets (10.2), is located at
Exhaust duct (10) on the right side of fire resistant doorsets (10.2) is connected by branch pipe (10.9) with main air inlet pipe (6.9), on branch pipe (10.9)
It is provided with the electrically operated valve (10.8) opening/closing for controlling branch pipe (10.9).
2. underground coal mine explosion protection system according to claim 1, which is characterized in that multiple spray heads are arranged at every section
(10.6)。
3. underground coal mine explosion protection system according to claim 1, which is characterized in that gas concentration sensor (10.1) is prevented
Vent (10.2), temperature sensor (10.4), pressure sensor (10.5), spray head (10.6), duster (10.7), Yi Ji electricity
Movable valve (10.8) is connected with controller (10.3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810172394.7A CN108316963A (en) | 2018-03-01 | 2018-03-01 | Underground coal mine explosion protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810172394.7A CN108316963A (en) | 2018-03-01 | 2018-03-01 | Underground coal mine explosion protection system |
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| CN108316963A true CN108316963A (en) | 2018-07-24 |
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| CN207037439U (en) * | 2017-07-28 | 2018-02-23 | 东莞普瑞得五金塑胶制品有限公司 | A kind of fire safety control system for exhaust gas apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2910213A1 (en) * | 1979-03-15 | 1980-09-25 | Ind Wert Beteiligungsgesellsch | Mine flame protection filter mesh - has heat sensor releasing quenching or cooling substance, pref. through valve |
| CN101158286A (en) * | 2007-11-15 | 2008-04-09 | 淮南矿业(集团)有限责任公司 | Coal mine light concentration mash gas safety conveying method and conveying system |
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Application publication date: 20180724 |