CN110044757A - Coal simulator and experimental method are put in a kind of collaboration of fully mechanized coal face three-dimensional group - Google Patents
Coal simulator and experimental method are put in a kind of collaboration of fully mechanized coal face three-dimensional group Download PDFInfo
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- CN110044757A CN110044757A CN201910336357.XA CN201910336357A CN110044757A CN 110044757 A CN110044757 A CN 110044757A CN 201910336357 A CN201910336357 A CN 201910336357A CN 110044757 A CN110044757 A CN 110044757A
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- 239000003245 coal Substances 0.000 title claims abstract description 295
- 238000002474 experimental method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 25
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 238000004088 simulation Methods 0.000 claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 33
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 239000003921 oil Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 239000013590 bulk material Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/222—Solid fuels, e.g. coal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
Abstract
The invention discloses a kind of collaborations of fully mechanized coal face three-dimensional group to put coal simulator and experimental method, the present invention construct can simulate fully mechanized coal face different process put coal group collaboration put device for coal, pass through the flexible opening closure to realize any number of coal discharge outlets of HYDRAULIC CONTROL SYSTEM hydraulic support plate, the shifting frame of hydraulic support is realized by the rotation of screw rod, drawing interval partition and foam support body can prevent top-coal control, a scale can represent a drawing interval on drawing interval partition, the setting of surrounding poly (methyl methacrylate) plate, the bastard coal characteristics of motion during coal is put in recordable analysis.The present apparatus puts drawing coal technology parameter of the coal method under different geological conditions for the collaboration of research group and provides laboratory simulation condition, more coal discharge outlet common operationals can be achieved in the present invention, coal efficiency is put in raising, coal-gangue boundary face can be made to form an inclined straight line of approximation, it reduces spoil layer to be mixed into coal seam, improves top-coal recovery rate and percentage of shale content.
Description
Technical field
The present invention relates to a kind of collaborations of fully mechanized coal face three-dimensional group to put coal simulator and experimental method, is related to similar mould
Draft experiment equipment technical field.
Background technique
Coal resources in China rich reserves, high seam are the main body coal seams that exploitation benefit is pursued in China, and reserves account for about me
The 45% of state's coal resources gross reserves.Be greater than most super high seams of 8.0m for coal seam thickness, in current production technology and
Under the conditions of equipment, mainly exploited using Coal Mining Equipment Complement technology.Longwall top coal caving technology passes through in China
Development in more than 30 years achieves significant technical effect, but there are still some problems, and production problem most outstanding is working face
Put that coal is inefficient low with top-coal recovery rate, at present comprehensive coal face top coal recovery time account for working face entirely mine the time half with
On, top-coal recovery rate is mostly 60% or so, and advanced in some equipment, the comprehensive coal face top-coal recovery rate of rational management also only has
85% or so.Fully mechanized coal face caving mode is all to put coal with single coal discharge outlet or discontinuous multiple coal discharge outlets at present, due to
Coal discharge outlet limited area, top-coal control is unsmooth, brings and puts that coal low efficiency, top-coal recovery rate be high, mixed high problems of cash rate.
Based on this background, for the present invention according to the theory of similarity, fully mechanized coal face different process can be simulated by, which constructing, puts coal
Device for coal is put in group's collaboration, is closed by the flexible opening to realize multiple coal discharge outlets of HYDRAULIC CONTROL SYSTEM hydraulic support plate
It closes, the shifting frame of hydraulic support is realized by the rotation of screw rod, realize the top-coal recovery rate under the conditions of different drawing coal technologies and contain
The measurement of cash rate, the setting of surrounding poly (methyl methacrylate) plate can recorde the bastard coal characteristics of motion analyzed and put during coal, to optimize
Coal efficiency, top-coal recovery rate are put in drawing coal technology, raising, reduce percentage of shale content.
Summary of the invention
The purpose of the present invention is to provide a kind of collaborations of fully mechanized coal face three-dimensional group to put coal simulator and experimental method,
To solve technical problem mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme:
Coal simulator is put in a kind of collaboration of fully mechanized coal face three-dimensional group comprising experimental provision frame, hydraulic support, spiral shell
Spinner handle, foam support body, closure plate, the discrete material for simulating top coal spoil, hydraulic support bottom nut structure, closure plate
Carrier structure, drawing interval partition, hydraulic oil pump, controller；It is characterized in that, the hydraulic support is arranged in experimental provision frame
On the bottom plate of frame,
Side on the bottom plate of the experimental provision frame is additionally provided with foam support body, supports on the foam support body
It is provided with the drawing interval partition；
The closure plate carrier structure is welded on the bottom plate of experimental provision frame；And the closure plate is drawer type
Plate is placed on closure plate carrier structure, can be closed experimental provision chassis base opening portion；
The layering of the top of the drawing interval partition and hydraulic support is filled with the granular media material of simulation top coal spoil
Material；
The bottom of the hydraulic support carries out driving company using the screw rod that hydraulic support bottom nut structure is threadedly coupled
It connects, to carry out driving movement by the screw rod, to realize the Forward movement of hydraulic support；
The hydraulic support and hydraulic oil pump are drivingly connected, and the hydraulic oil pump is controlled by the controller, with
Just the coal discharge outlet for opening or closing different number is realized.
Further, device pedestal is provided with preferably, welding on the angle of bottom four of the experimental provision frame.
Further, preferably, the bottom plate of the experimental provision frame is strip compartment arrangement.
Further, preferably, indicating scale on the drawing interval partition, a scale represents a drawing interval.
Further, preferably, drawing interval partition be can drawable, be placed on experimental provision frame mid portion opening position
It sets.
Further, preferably, the hydraulic support includes bracket base, column, hydraulic support top beam, hydraulic support tail
Beam, tail boom oil cylinder and tail beam flashboard, wherein the hydraulic support bottom nut structure, institute is arranged in the bottom of the bracket base
It states and upright supports is provided with hydraulic support top beam on hydraulic support foundation, described in the end connection of the hydraulic support top beam
Hydraulic support tail boom, is connected with the tail beam flashboard using the tail boom oil cylinder on the hydraulic support tail boom, and the tail boom is inserted
Plate carries out driving by the tail boom oil cylinder and stretches, to realize the open and close control of coal discharge outlet.
Further, preferably, the discrete material of the simulation top coal spoil includes the different structure of multilayer partial size.
Further, preferably, a side end of experimental provision frame is stretched out in the end of the screw rod.
Further, preferably, the surrounding of the experimental framework is PVC poly (methyl methacrylate) plate.
In addition, the present invention also provides the experimental method that coal simulator is put in a kind of collaboration of fully mechanized coal face three-dimensional group,
It is characterized in that, it includes the following steps:
(1) it determines similar parameter: by the comparison under field geology conditions, drawing coal technology and laboratory condition, calculating true
Determine the size of geometry, time, bulk density similarity factor；
Geometric similarity coefficient:
aL=Lm/Ly
In formula: LmMoulded dimension；m.
LyPrototype size, m.
Time similarity factor:
In formula: tmModel time；
tyPrototype time；
Bulk density similarity factor:
aγ=γm/γy
In formula: γmModel bulk density, N/m3；
γyPrototype bulk density, N/m3；
(2) prepare similar materials: by the measurement and experiment to live bastard coal sample, being chosen and closed according to similar parameter
Suitable discrete material simulates broken top coal and spoil as experimental material；
(3) similar materials are laid with: according to similarity factor and live top coal, spoil thickness, being pressed on experimental provision
Specific thicknesses and sequence are laid with discrete material from level to level to simulate broken coal seam and direct top, and top coal is divided into three partial sizes
Rank of different sizes；
(5) coal simulation is put in the more coal discharge outlet collaborations in tendency direction: hydraulic oil pump controlled by controller and gives tail boom oil cylinder feed flow,
Realize the flexible of tail beam flashboard, to accomplish to open or close the coal discharge outlet of different number, coal, group are put in multiple coal discharge outlets collaborations
It includes that coal process is put in starting, coal process is put in centre and coal process is put in end that coal method is put in collaboration；
Coal process is put in starting: the collaboration of more coal discharge outlets puts coal starting caving mode and has " opening simultaneously inverse time to close " " sequentially etc.
Difference is opened " " being sequentially spaced equal difference to open ", with " opening simultaneously inverse time to close " starting caving mode, first simultaneously by controller
N coal discharge outlet is opened, then coal-rock detection face meeting after coal is put in inverse at a certain time interval each coal discharge outlet of closing, starting
Form the inclined straight line of approximation；
Put coal process in centre: on the basis of coal condition is put in starting, opening simultaneously n coal discharge outlet, according to see cash close the door
Principle closes the coal discharge outlet for seeing cash, opens simultaneously the coal discharge outlet closed on, remains n coal discharge outlet while putting coal；
Put coal process in end: it is the last stage that more coal discharge outlets put coal that coal is put in end, i.e. the last one n coal discharge outlet
Coal process is put, according to the principle for seeing that cash is closed the door, the last one n coal discharge outlet is successively closed, until the last one coal discharge outlet closes
It closes, coal process is put in tendency direction to be terminated；
(6) it moves towards direction and puts coal simulation: after coal is put in tendency direction, foam support body is successively extracted out, by drawing interval
Partition pulls out a step pitch, by rotating screw rod, hydraulic support is moved forward and is connected with drawing interval partition, while mobile closure
Plate closely follows tail boom, connects with tail boom, then repeatedly step (5), releases the step pitch hydraulic support top top coal；
Then above-mentioned steps are repeated in, next round is carried out and puts coal, until all top coals are released；
(7) Materials Measurement and interpretation of result are released: the discrete material for simulating top coal and spoil being divided into two parts with sieve,
Weigh up its quality respectively, calculate top-coal recovery rate and percentage of shale content, observe and analyze put coal during coal-gangue boundary line mobile rule
Rule；
Top-coal recovery rate:
C=Mc/ρcL1L2H
In formula: McRelease the quality of granular media top coal, kg；
ρcThe density of bulk material top coal, kg/m3；
L1It is long to put coal sections bottom, m；
L2It is wide to put coal sections bottom, m；
H- simulates the thickness in coal seam, m；
Percentage of shale content:
R=Mr/(Mc+Mr)
In formula: McRelease the quality of granular media top coal, kg；
MrRelease the quality of granular media spoil, kg.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention according to the theory of similarity, construct can simulate fully mechanized coal face different process put coal group collaboration put
Device for coal is closed by the flexible opening to realize any number of coal discharge outlets of HYDRAULIC CONTROL SYSTEM hydraulic support plate, is led to
The shifting frame of hydraulic support is realized in the rotation for crossing screw rod, and drawing interval partition and foam support body can prevent top-coal control, put
A scale can represent a drawing interval on coal step pitch partition, and the setting of surrounding poly (methyl methacrylate) plate can recorde analysis and put
The bastard coal characteristics of motion during coal.The present apparatus is that drawing coal technology of the coal method under different geological conditions is put in the collaboration of research group
Parameter provides laboratory simulation condition.
2, present apparatus high degree of automation, it is easy to operate, coal situation is put closer to scene, direction and tendency direction is moved towards and puts
The equal analog of coal, can be to avoid boundary effect caused by existing experimental provision, can be with by the measurement of the discrete material to releasing
Top-coal recovery rate and percentage of shale content are calculated, to optimize to drawing coal technology, coal efficiency, top-coal recovery rate are put in raising, and reduction contains
Cash rate.
3, coal experimental method is put in a kind of fully mechanized coal face three-dimensional group collaboration proposed by the present invention can realize that more coal discharge outlets are total
Coal efficiency is put in same operation, raising, and coal-gangue boundary face can be made to form an inclined straight line of approximation, is reduced spoil layer and is mixed into coal seam
In, improve top-coal recovery rate and percentage of shale content.
Detailed description of the invention
Fig. 1 is that coal simulator side view is put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 2 is that coal simulator main view is put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 3 is that coal simulator flat surface figure is put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 4 is that coal simulator hydraulic support main view is put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 5 is that coal simulator hydraulic support side view is put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 6 is that coal simulator closure plate and its carrier structure figure are put in the collaboration of fully mechanized coal face three-dimensional group；
Fig. 7 is that coal simulator hydraulic schematic is put in the collaboration of fully mechanized coal face three-dimensional group；
Wherein, 1. experimental provision frame；2. hydraulic support；3. screw rod；4. foam support body；5. device pedestal；6. closing
Close plate；7. simulating the discrete material of top coal spoil；8. hydraulic support bottom nut structure；9. being closed plate carrier structure；10.
Hydraulic support top beam；11. hydraulic support tail boom；12. drawing interval partition；Tail boom oil cylinder 13；Tail beam flashboard 14；Hydraulic oil pump
15；Controller 16.
Specific embodiment
Please referring to Fig. 1~7, in the embodiment of the present invention, coal simulator is put in a kind of collaboration of fully mechanized coal face three-dimensional group,
Including experimental provision frame 1, hydraulic support 2, screw rod 3, foam support body 4, closure plate 6, the granular media for simulating top coal spoil
Material 7, hydraulic support bottom nut structure 8, closure plate carrier structure 9, drawing interval partition 12, hydraulic oil pump 15, control
Device 16；It is characterized in that, the hydraulic support 2 is arranged on the bottom plate of experimental provision frame 1,
Side on the bottom plate of the experimental provision frame 1 is additionally provided with foam support body 4, on the foam support body 4
Support is provided with the drawing interval partition 12；
The closure plate carrier structure 9 is welded on the bottom plate of experimental provision frame 1；And the closure plate 6 is to take out
Drawer formula plate is placed on closure plate carrier structure 9, can be closed 1 bottom plate opening portion of experimental provision frame；
The layering of the top of the drawing interval partition 12 and hydraulic support 2 is filled with the granular media of simulation top coal spoil
Material 7；
The bottom of the hydraulic support 2 is driven using the screw rod 3 that hydraulic support bottom nut structure 8 is threadedly coupled
Connection, to carry out driving movement by the screw rod 3, to realize the Forward movement of hydraulic support；
The hydraulic support 2 is drivingly connected with hydraulic oil pump 15, and the hydraulic oil pump 15 is carried out by the controller 16
Control, to realize the coal discharge outlet for opening or closing different number.
In the present embodiment, welding is provided with device pedestal 5 on the angle of the bottom of the experimental provision frame 1 four.It is described
The bottom plate of experimental provision frame 1 is strip compartment arrangement.Scale is indicated on the drawing interval partition 12, a scale represents
One drawing interval, drawing interval partition 12 be can drawable, be placed on 1 intermediate openings position of experimental provision frame.
Wherein, the hydraulic support 2 includes bracket base, column, hydraulic support top beam 10, hydraulic support tail boom 11, tail
Beam oil cylinder 13 and tail beam flashboard 14, wherein the hydraulic support bottom nut structure 8, institute is arranged in the bottom of the bracket base
It states and upright supports is provided with hydraulic support top beam 10, the end connection of the hydraulic support top beam 10 on hydraulic support foundation
The hydraulic support tail boom 11 is connected with the tail beam flashboard using the tail boom oil cylinder 13 on the hydraulic support tail boom 11
14, the tail beam flashboard 14 carries out driving by the tail boom oil cylinder 13 and stretches, to realize the open and close control of coal discharge outlet.
The discrete material 7 of the simulation top coal spoil includes the different structure of multilayer partial size.It stretches the end of the screw rod 3
A side end of experimental provision frame 1 out.The surrounding of the experimental framework 1 is PVC poly (methyl methacrylate) plate.
In addition, the present invention also provides a kind of collaborations of fully mechanized coal face three-dimensional group to put coal analogy method；It is characterized in that,
It includes the following steps:
(1) it determines similar parameter: by the comparison under field geology conditions, drawing coal technology and laboratory condition, calculating true
Determine the size of the similarity factors such as geometry, time, bulk density.
By taking 15m thickness coal rock layer as an example, it is 1.5m that Binding experiment plant bulk, which takes simulated altitude, then,
Geometric similarity coefficient:
aL=Lm/Ly=1/10
In formula: LmMoulded dimension；m.
LyPrototype size, m.
Time similarity factor:
In formula: tmModel time；
tyPrototype time.
Bulk density similarity factor:
ar=γm/γy=0.6
In formula: γmModel bulk density, N/m3；
γyPrototype bulk density, N/m3。
(2) prepare similar materials: by the measurement and experiment to live bastard coal sample, being chosen and closed according to similar parameter
Suitable discrete material 7 simulates broken top coal and spoil as experimental material.
Example is 0.1m~0.4m by the coal cinder size that in-site measurement is released, and direct rimrock block lumpiness is 0.4m~0.8m,
The Loose Bodies that then geometric similarity coefficient chooses that partial size is 1cm~4cm and 4cm~8cm before simulate respectively broken coal seam with
Directly push up.
(3) similar materials are laid with: according to similarity factor and live top coal, spoil thickness, being pressed on experimental provision
Specific thicknesses and sequence are laid with discrete material 7 from level to level to simulate broken coal seam and direct top, and top coal is divided into three grains
Diameter rank of different sizes.
By taking 15m thickness coal rock layer as an example, coal rock layer lumpiness becomes larger from the bottom up, and three layers of 11m high seam point is used respectively
The coal seam of the particle simulation difference lumpiness size of 1cm~2cm, 2cm~3cm, 3cm~4cm partial size, with the partial size of 4cm~8cm
The broken direct top of particle simulation.
(5) coal simulation is put in the more coal discharge outlet collaborations in tendency direction: controlling hydraulic oil pump 15 to tail boom oil cylinder by controller 16
13 feed flows realize the flexible of tail beam flashboard 14, to accomplish to open or close the coal discharge outlet of different number, multiple coal discharge outlets collaborations
Put coal.It includes that coal process is put in starting, coal process is put in centre and coal process is put in end that coal method is put in group's collaboration.
Coal process is put in starting: the collaboration of more coal discharge outlets puts coal starting caving mode and has " opening simultaneously inverse time to close " " sequentially etc.
Difference is opened " " being sequentially spaced equal difference to open ".By taking " opening simultaneously inverse time to close " starting caving mode as an example, pass through controller first
N coal discharge outlet is opened simultaneously, then (such as 10s) closes each coal discharge outlet inverse time at a certain time interval, and coal is put in starting to be terminated
Coal-rock detection face will form the inclined straight line of approximation afterwards.
Put coal process in centre: on the basis of coal condition is put in starting, opening simultaneously n coal discharge outlet, according to see cash close the door
Principle closes the coal discharge outlet for seeing cash, opens simultaneously the coal discharge outlet closed on, remains n coal discharge outlet while putting coal.
Put coal process in end: it is the last stage that more coal discharge outlets put coal that coal is put in end, i.e. the last one n coal discharge outlet
Coal process is put, according to the principle for seeing that cash is closed the door, the last one n coal discharge outlet is successively closed, until the last one coal discharge outlet closes
It closes, coal process is put in tendency direction to be terminated.
(6) it moves towards direction and puts coal simulation: after coal is put in tendency direction, foam support body 4 is successively extracted out, by drawing interval
Partition 12 pulls out a step pitch, by rotating screw rod 3, hydraulic support 2 is moved forward and is connected with drawing interval partition 12, same to time shift
Dynamic closure plate 6 closely follows tail boom 11, connects with tail boom 11, then repeatedly step (5), releases 2 top of step pitch hydraulic support top
Coal.
Then above-mentioned steps are repeated in, next round is carried out and puts coal, until all top coals are released.
(7) Materials Measurement and interpretation of result are released: the discrete material 7 for simulating top coal and spoil being divided into two with sieve
Point, weigh up its quality respectively, calculate top-coal recovery rate and percentage of shale content, observe and analyze put coal during coal-gangue boundary line movement
Rule.
Top-coal recovery rate:
C=Mc/ρcL1L2H
In formula: McRelease the quality of granular media top coal, kg；
ρcThe density of bulk material top coal, kg/m3；
L1It is long to put coal sections bottom, m；
L2It is wide to put coal sections bottom, m；
H- simulates the thickness in coal seam, m.
Percentage of shale content:
R=Mr/(Mc+Mr)
In formula: McRelease the quality of granular media top coal, kg；
MrRelease the quality of granular media spoil, kg.
It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. coal simulator is put in a kind of collaboration of fully mechanized coal face three-dimensional group comprising experimental provision frame (1), hydraulic support
(2), screw rod (3), foam support body (4), closure plate (6), the discrete material (7) for simulating top coal spoil, hydraulic support bottom
Portion's nut structure (8), closure plate carrier structure (9), drawing interval partition (12), hydraulic oil pump (15), controller (16)；Its
It being characterized in that, the hydraulic support (2) is arranged on the bottom plate of experimental provision frame (1),
Side on the bottom plate of the experimental provision frame (1) is additionally provided with foam support body (4), the foam support body (4)
Upper support is provided with the drawing interval partition (12)；
The closure plate carrier structure (9) is welded on the bottom plate of experimental provision frame (1)；And the closure plate 6 is to take out
Drawer formula plate is placed in closure plate carrier structure (9), can be closed experimental provision frame (1) bottom plate opening portion；
The layering of the top of the drawing interval partition (12) and hydraulic support (2) is filled with the granular media of simulation top coal spoil
Material (7)；
It is driven using the screw rod (3) that hydraulic support bottom nut structure (8) is threadedly coupled the bottom of the hydraulic support (2)
Dynamic connection, to carry out driving movement by the screw rod (3), to realize the Forward movement of hydraulic support；
The hydraulic support (2) and hydraulic oil pump (15) are drivingly connected, and the hydraulic oil pump (15) is by the controller (16)
It is controlled, to realize the coal discharge outlet for opening or closing different number.
2. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1, which is characterized in that institute
It states welding on the angle of bottom four of experimental provision frame (1) and is provided with device pedestal (5).
3. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 2, which is characterized in that institute
The bottom plate of experimental provision frame (1) is stated as strip compartment arrangement.
4. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 2, which is characterized in that institute
It states and indicates scale on drawing interval partition (12), a scale represents a drawing interval.
5. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 4, which is characterized in that put
Coal step pitch partition (12) be can drawable, be placed on experimental provision frame (1) intermediate openings position.
6. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1, which is characterized in that institute
Stating hydraulic support (2) includes bracket base, column, hydraulic support top beam (10), hydraulic support tail boom (11), tail boom oil cylinder (13)
With tail beam flashboard (14), wherein the hydraulic support bottom nut structure (8), the liquid is arranged in the bottom of the bracket base
It is provided with hydraulic support top beam (10) on pressure bracket base using upright supports, the end connection of the hydraulic support top beam (10)
The hydraulic support tail boom (11) is connected with the tail boom using the tail boom oil cylinder (13) on the hydraulic support tail boom (11)
Plate (14), the tail beam flashboard (14) carries out driving by the tail boom oil cylinder (13) and stretches, to realize the opening and closing of coal discharge outlet
Control.
7. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1, which is characterized in that institute
The discrete material (7) for stating simulation top coal spoil includes the different structure of multilayer partial size.
8. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1, which is characterized in that institute
A side end of experimental provision frame (1) is stretched out in the end for stating screw rod (3).
9. coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1, which is characterized in that institute
The surrounding for stating experimental framework (1) is PVC poly (methyl methacrylate) plate.
10. the experimental method of coal simulator is put in a kind of fully mechanized coal face three-dimensional group collaboration according to claim 1,
It is characterized in that comprising following step:
(1) it determines similar parameter: by the comparison under field geology conditions, drawing coal technology and laboratory condition, it is several to calculate determination
What, the time, bulk density similarity factor size；
Geometric similarity coefficient:
aL=Lm/Ly
In formula: LmMoulded dimension；m.
LyPrototype size, m.
Time similarity factor:
In formula: tmModel time；
tyPrototype time；
Bulk density similarity factor:
ar=γm/γy
In formula: γmModel bulk density, N/m3；
γyPrototype bulk density, N/m3；
(2) prepare similar materials: by the measurement and experiment to live bastard coal sample, it is suitable to be chosen according to similar parameter
Discrete material (7) simulates broken top coal and spoil as experimental material；
(3) similar materials are laid with: according to similarity factor and live top coal, spoil thickness, by specific on experimental provision
Thickness and sequence are laid with discrete material (7) from level to level to simulate broken coal seam and direct top, and top coal is divided into three partial sizes
Rank of different sizes；
(5) coal simulation is put in the more coal discharge outlet collaborations in tendency direction: by controller (16) control hydraulic oil pump (15) to tail boom oil cylinder
(13) feed flow realizes the flexible of tail beam flashboard (14), to accomplish to open or close the coal discharge outlet of different number, multiple coal discharge outlets
Coal is put in collaboration, and it includes that coal process is put in starting, coal process is put in centre and coal process is put in end that coal method is put in group's collaboration；
Coal process is put in starting: the collaboration of more coal discharge outlets puts coal starting caving mode and has " opening simultaneously inverse time to close " that " sequentially equal difference is beaten
Open " " sequentially interval equal difference is opened ", caving mode is originated with " opening simultaneously inverse time to close ", is opened simultaneously first by controller
N coal discharge outlet, then inverse at a certain time interval each coal discharge outlet of closing, the coal-rock detection face after putting coal that originates will form
One inclined straight line of approximation；
It puts coal process in centre: on the basis of coal condition is put in starting, opening simultaneously n coal discharge outlet, according to the principle for seeing that cash is closed the door
The coal discharge outlet for seeing cash is closed, the coal discharge outlet closed on is opened simultaneously, remains n coal discharge outlet while putting coal；
Put coal process in end: it is the last stage that more coal discharge outlets put coal that coal is put in end, i.e., the last one n coal discharge outlet puts coal
Process successively closes the last one n coal discharge outlet according to the principle for seeing that cash is closed the door, until the last one coal discharge outlet is closed, inclines
Putting coal process to direction terminates；
(6) move towards direction put coal simulation: tendency direction put coal after, successively extract out foam support body (4), by drawing interval every
Plate pulls out a step pitch, by rotating screw rod, hydraulic support is moved forward and is connected with drawing interval partition, while mobile closure is inserted
Plate closely follows tail boom, connects with tail boom, then repeatedly step (5), releases the step pitch hydraulic support top top coal；
Then above-mentioned steps are repeated in, next round is carried out and puts coal, until all top coals are released；
(7) Materials Measurement and interpretation of result are released: the discrete material for simulating top coal and spoil being divided into two parts with sieve, respectively
Weigh up its quality, calculate top-coal recovery rate and percentage of shale content, observe and analyze put coal during coal-gangue boundary line movement law；
Top-coal recovery rate:
C=Mc/ρcL1L2H
In formula: McRelease the quality of granular media top coal, kg；
ρcThe density of bulk material top coal, kg/m3；
L1It is long to put coal sections bottom, m；
L2It is wide to put coal sections bottom, m；
H- simulates the thickness in coal seam, m；
Percentage of shale content:
R=Mr/(Mc+Mr)
In formula: McRelease the quality of granular media top coal, kg；
MrRelease the quality of granular media spoil, kg.
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| CN117167012A (en) * | 2023-11-03 | 2023-12-05 | 中国矿业大学(北京) | Multi-wheel reverse sequence coal caving process for horizontal sectional fully-mechanized caving mining of steeply inclined coal seam |
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