CN114151085A - Coal mine 'three-lower' coal pressing filling mining system and method - Google Patents

Coal mine 'three-lower' coal pressing filling mining system and method Download PDF

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Publication number
CN114151085A
CN114151085A CN202111499383.8A CN202111499383A CN114151085A CN 114151085 A CN114151085 A CN 114151085A CN 202111499383 A CN202111499383 A CN 202111499383A CN 114151085 A CN114151085 A CN 114151085A
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coal
gear
gangue
slurry
screening
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CN114151085B (en
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孟凡瑞
崔兴太
李吉军
刘德平
杨学强
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Shandong Luchuang Energy Technology Co ltd
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Shandong Luchuang Energy Technology Co ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • E21F13/002Crushing devices specifically for conveying in mines
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings

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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)
  • Mechanical Engineering (AREA)
  • Remote Sensing (AREA)
  • Crushing And Grinding (AREA)

Abstract

The invention relates to the technical field of coal mining, and discloses a coal mine 'three-lower' coal-pressing filling mining system and a method, which comprises a screening and separating system and a ground pulping system, wherein the screening and separating system comprises coal gangue separating equipment, a crusher and a screening machine, and the coal gangue separating equipment is used for separating coal and coal gangue from a coal mine conveyed by a coal conveying belt; the coal gangue produced by the roadway, the gangue produced by a gangue mountain and the slag produced by a thermal power plant are crushed to form aggregate with the particle size of less than 3cm in the roadway after mining is finished, the high-speed pulper is used for producing slurry, the aggregate and the slurry are conveyed to a filling place, the aggregate and the slurry are uniformly mixed and then introduced from a roadway opening needing to be filled, and the roadway needing to be filled is filled by utilizing the gravity and the fluidity of the slurry, so that the workload of post-processing can be reduced, and the condition of potential safety hazard of a coal mining area is greatly reduced due to the existence of the roadway.

Description

Coal mine 'three-lower' coal pressing filling mining system and method
Technical Field
The invention relates to the technical field of coal mining, in particular to a coal mine 'three-lower' coal pressing filling mining system and a coal mine 'three-lower' coal pressing filling mining method.
Background
Coal is a solid combustible mineral formed gradually by burying ancient plants underground and undergoing complex biochemical and physicochemical changes, is one of indispensable energy sources for production and life of human beings, is also related to the stability of the development of the industry of China and the aspects of the whole society, has the problem of coal supply safety, is the most important part of the energy safety of China, and coal mining becomes an indispensable mineral mining industry because coal resources are important. Coal mining has also raised serious environmental concerns while promoting economic development. The problems of underground water flow, land subsidence and the like are caused in the coal mining process, so that the ecological environment is polluted, and the harmony and stability of the society are influenced. With the rapid development of economy in China, the production and utilization modes of energy are continuously improved, the coal industry is approaching to a safe, green and economic energy industry system, and the traditional coal mining industry generally fills existing roadways intensively after coal mines are all mined, so that the workload of subsequent treatment is increased, and the potential safety hazard of a coal mining area can be increased due to the existence of the roadways.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a coal mine 'three-lower' coal pressing filling mining system and a coal mine 'three-lower' coal pressing filling mining method, which solve the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a coal mine "three under" pressure coal filling mining system and method, includes screening piece-rate system and ground slurrying system, screening piece-rate system includes gangue splitter, breaker and sieve separator, gangue splitter is used for carrying out the coal that fortune coal belt carried and carries out the separation of coal and gangue, and the coal of separating is carried thermal power system and is carried thermal power, and the gangue of separating carries and carries out thermal power, and the gangue of separating out is carried out the breaker in and is broken, the breaker is used for carrying out the gangue that gangue splitter separated out, slag that thermal power system carried and the gangue hill carried and form the aggregate, the sieve separator is used for screening the aggregate that the particle size is less than 3cm, after screening the aggregate that the particle size is less than 3cm, carries to stirring mixing equipment through fortune gangue belt, ground slurrying system includes storage tank, coal gangue, Screw conveyer, high-speed pulper, buffer pool, the storage tank is arranged in the mixture of storage cement and fly ash, screw conveyer is arranged in carrying the material in the storage tank to high-speed pulper, high-speed pulper is arranged in adding water the material that screw conveyer carried and stirs into the thick liquid, the buffer pool is used for storing the thick liquid that high-speed pulper preparation was accomplished to carry the thick liquid to the thick liquid pump through the thick liquid on the thick liquid pipeline to the stirring mixing equipment, stirring mixing equipment is with aggregate and thick liquid misce bene, then pours the thick liquid after the misce bene into from the tunnel road junction that needs to fill, under gravity and the mobile effect of thick liquid, fills the tunnel that needs to fill.
Preferably, when the aggregate is screened by the screening machine, the aggregate with the particle size smaller than 3cm is directly conveyed to the stirring and mixing equipment through the gangue conveying belt, and the aggregate with the particle size larger than 3cm is returned to the crusher to be crushed again until all the aggregate with the particle size smaller than 3 cm.
Preferably, the system also comprises a control system, and the screening and separating system, the ground pulping system, the slurry pump, the coal conveying belt and the gangue conveying belt are in signal connection with the control system.
Preferably, a stirrer is installed on the buffer tank, and an electromagnetic valve is fixed at the discharge port of the storage tank.
Preferably, the coal gangue separation equipment comprises a separation barrel, the separation barrel is of a hollow cuboid structure with an open top, a pore plate is fixed on the left side inside the separation barrel, a rotating plate is connected to the right side inside the separation barrel in a rotating manner, a stop block is fixed on the right side inside the separation barrel, the top of the stop block is attached to the bottom of the rotating plate, the left end of the rotating plate is attached to the right end of the pore plate, a coal outlet is formed in the right side of the separation barrel above the rotating plate, a first seal plate is connected to the right side of the separation barrel in a rotating manner through a torsion spring, the first seal plate is attracted to the separation barrel and covers the coal outlet, a gangue outlet is formed in the right side of the separation barrel below the rotating plate, and a second seal plate is connected to the right side of the separation barrel through a torsion spring in a rotating manner, the second closing plate and the separating cylinder are mutually attracted, a gangue guide plate is integrally formed on the right side of the inside of the separating cylinder, the inside of the separating cylinder is located on a partition plate which is integrally formed on the lower side of the gangue guide plate, the inside of the separating cylinder is located on the lower side of the partition plate, a transmission shaft is rotatably connected with the left end of the transmission shaft, the left end of the transmission shaft extends to the left side of the separating cylinder and is fixed with a belt pulley, a belt is sleeved on the outer side wall of the belt pulley, the other end of the belt is sleeved on the driving end of a coal conveying belt, a piston is arranged on the inside of the separating cylinder and located above the partition plate, water is arranged between the piston and the pore plates, a first connecting rod is fixed at the bottom of the piston, the partition plate is penetrated through the bottom end of the first connecting rod, a second connecting rod is rotatably connected with the bottom of the second connecting rod, and a ring body is sleeved on the outer side wall of the transmission shaft, and is rotatably connected with the transmission shaft.
Preferably, the pore plate is inclined with a height from left to right, the inclination angle of the pore plate is 20-30 degrees, the ground of the gangue guide plate is also inclined with a height from left to right, and the inclination angle of the gangue guide plate is 25-33 degrees.
Preferably, the mixing and stirring equipment comprises a stirring tank, a gear box is fixed on the inner upper surface of the stirring tank, a slurry box is fixed on the front surface of the gear box, an impeller is connected to the inner rotation of the slurry box, a slurry outlet is fixed at the bottom of the slurry box, a slurry inlet is fixed on the left side of the top of the stirring tank, the bottom end of the slurry inlet extends to the inner portion of the slurry box, the bottom end of the slurry inlet is in a right-inclined shape, the middle shaft rear end of the impeller is rotatably connected with the inner rear surface of the gear box, a driving gear is fixed inside the gear box on the middle shaft of the impeller, a driven gear is rotatably connected with the inner rear surface of the gear box in a meshed manner, a first gear is rotatably connected with the inner lower surface of the gear box in a meshed manner, the inside lower surface of gear box rotates and is connected with the second gear, the second gear with first gear engagement is connected, just the middle part of second gear is fixed with the axis body, the lateral wall symmetry of axis body is fixed with the stirring leaf, the inside rear surface of gear box rotates and is connected with the third gear, the third gear with driven gear engagement is connected, the inside right side of gear box rotates and is connected with the fourth gear, the fourth gear with third gear engagement is connected, just the middle part of fourth gear is fixed with the crushing roller, the top right side of agitator tank is fixed with the aggregate import.
Preferably, the diameters of the driving gear and the driven gear are the same, the diameter of the driven gear is 1.5-2 times of the diameters of the first gear and the third gear, the diameter of the first gear is 2.5-3 times of the diameter of the second gear, and the diameter of the third gear is 1.5-2 times of the diameter of the fourth gear.
A coal mine 'under three' coal-pressing filling mining method is characterized in that: the method comprises the following steps:
s1, tunneling a roadway through a coal mining machine, and transporting the collected coal mine to a screening and separating system by using a coal conveying belt;
s2, coal and coal gangue in a coal mine are separated by coal gangue separation equipment in the screening and separating system, the coal which wastes labor is conveyed to a thermal power generation system for thermal power generation, the separated coal gangue is conveyed to a crusher for crushing, and slag generated by the thermal power generation system and gangue generated by a gangue dump are also conveyed to the crusher for crushing to form aggregate;
s3, conveying the aggregates formed after crushing by the crusher to a screening machine in a screening and separating system for screening, conveying the aggregates with the particle size of less than 3cm to stirring and blending equipment through a gangue conveying belt after screening the aggregates with the particle size of more than 3cm, and returning the aggregates with the particle size of more than 3cm to the crusher for secondary crushing until the particle sizes of all the aggregates screened by the screening machine are less than 3 cm;
s4, simultaneously conveying the cement and the fly ash in the storage tank in the ground pulping system into a high-speed pulping machine by a screw conveyor to prepare slurry, and introducing the prepared slurry into a buffer tank;
s5, pumping the slurry in the buffer pool into a slurry conveying pipeline by using a slurry pump, conveying the slurry into a stirring and mixing device through the slurry conveying pipeline, uniformly mixing the aggregate and the slurry through the stirring and mixing device, injecting the uniformly mixed slurry into a roadway to be filled, and filling the roadway to be filled with the slurry under the action of gravity and the fluidity of the slurry.
(III) advantageous effects
The invention provides a coal mine 'under three' pressing coal filling mining system and a method thereof, which have the following beneficial effects:
(1) in the process of coal mining, the coal gangue produced by the roadway, the gangue produced by a gangue mountain and the slag produced by a thermal power plant are crushed to form aggregate with the particle size of less than 3cm in the roadway after mining is finished, the high-speed pulper is used for producing slurry, the aggregate and the slurry are conveyed into stirring and mixing equipment, the aggregate and the slurry are led in from the roadway opening needing to be filled after mixing, and the roadway needing to be filled is filled by utilizing the gravity and the fluidity of the slurry, so that the workload of post-processing can be reduced, and the condition of potential safety hazard in a mining coal mine area is greatly reduced due to the existence of the roadway.
(2) The coal gangue separation equipment in the invention utilizes the power of the coal conveying belt as the driving power, so that coal and coal gangue in a coal mine can be separated, and because the driving power of the coal gangue separation equipment and the power of the coal conveying belt are the same power, the coal gangue separation equipment can be synchronously stopped after the coal conveying belt is stopped, thereby avoiding the situation that the coal conveying belt is stopped and the coal gangue separation equipment runs in an idle state, and easily increasing the loss of the coal gangue separation equipment.
(3) The stirring and mixing equipment disclosed by the invention drives the stirring structure to rotate by using the impact force of the slurry as power, so that the slurry and the gangue can be mixed uniformly, the function of running the materials immediately can be realized, the situations that the materials stop being conveyed and the equipment runs in an idle state are avoided, the situation that the equipment cannot run in time due to the conveyed materials is avoided, and the cost of manual operation is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic structural diagram of a coal gangue separation apparatus according to the present invention;
FIG. 3 is a schematic structural view of a stirring and mixing device according to the present invention;
FIG. 4 is a schematic top view of the internal structure of the gear box and the slurry box of the present invention.
In the figure: 1. a belt pulley; 2. a belt; 3. a partition plate; 4. a piston; 5. a separation cylinder; 6. an orifice plate; 7. a gangue guide plate; 8. a rotating plate; 9. a coal outlet; 10. a first seal plate; 11. a stopper; 12. a gangue outlet; 13. a second seal plate; 14. a first link; 15. a second link; 16. a drive shaft; 17. a ring body; 18. a stirring tank; 19. stirring blades; 20. a slurry outlet; 21. a slurry box; 22. an impeller; 23. a slurry inlet; 24. a driven gear; 25. a first gear; 26. a third gear; 27. a fourth gear; 28. an aggregate inlet; 29. a crushing roller; 30. a gear box; 31. a shaft body; 32. a driving gear; 33. a second gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the present invention provides a technical solution: a coal mine 'three-lower' pressing coal filling mining system and a method thereof comprise a screening and separating system, a ground pulping system and a control system, wherein the screening and separating system comprises a coal gangue separating device, a crusher and a screening machine, the coal gangue separating device is used for separating coal and coal gangue conveyed by a coal conveying belt from the coal mine, the separated coal is conveyed to a thermal power generation system for thermal power generation, the separated coal gangue is conveyed to the crusher for crushing, the crusher is used for crushing the coal gangue separated by the coal gangue separating device, slag conveyed by the thermal power generation system and gangue conveyed by a gangue dump to form aggregate, the screening machine is used for screening aggregate with the particle size of less than 3cm, the aggregate with the particle size of less than 3cm is conveyed to a stirring and mixing device through the gangue conveying belt after being screened, the aggregate with the particle size of less than 3cm is directly conveyed to the stirring and mixing device through the gangue conveying belt when the aggregate is screened by the screening machine, the ground pulping system comprises a storage tank, a screw conveyor, a high-speed pulping machine and a buffer tank, wherein the storage tank is used for storing a mixture of cement and fly ash, an electromagnetic valve is fixed at a discharge port of the storage tank, the screw conveyor is used for conveying materials in the storage tank into the high-speed pulping machine, the high-speed pulping machine is used for adding water into the materials conveyed by the screw conveyor and stirring the materials into slurry, the buffer tank is used for storing the slurry manufactured by the high-speed pulping machine and conveying the slurry into stirring and mixing equipment through a slurry pump on a slurry conveying pipeline, a stirrer is arranged on the buffer tank and used for stirring the slurry in the buffer tank to avoid the situation that the slurry is layered, the stirring and mixing equipment uniformly mixes the aggregate and the slurry, and then pours the uniformly mixed slurry into a tunnel opening to be filled, under the action of gravity and slurry fluidity, the roadway to be filled is filled, and the screening and separating system, the ground pulping system, the slurry pump, the coal conveying belt and the gangue conveying belt are in signal connection with the control system.
A coal mine nearly horizontal coal seam filling mining method is characterized in that: the method comprises the following steps:
s1, tunneling a roadway through a coal mining machine, and transporting the collected coal mine to a screening and separating system by using a coal conveying belt;
s2, coal and coal gangue in a coal mine are separated by coal gangue separation equipment in the screening and separating system, the coal which wastes labor is conveyed to a thermal power generation system for thermal power generation, the separated coal gangue is conveyed to a crusher for crushing, and slag generated by the thermal power generation system and gangue generated by a gangue dump are also conveyed to the crusher for crushing to form aggregate;
s3, conveying the aggregates formed after crushing by the crusher to a screening machine in a screening and separating system for screening, conveying the aggregates with the particle size of less than 3cm to stirring and blending equipment through a gangue conveying belt after screening the aggregates with the particle size of more than 3cm, and returning the aggregates with the particle size of more than 3cm to the crusher for secondary crushing until the particle sizes of all the aggregates screened by the screening machine are less than 3 cm;
s4, simultaneously conveying the cement and the fly ash in the storage tank in the ground pulping system into a high-speed pulping machine by a screw conveyor to prepare slurry, and introducing the prepared slurry into a buffer tank;
and S5, pumping the slurry in the buffer tank into a slurry conveying pipeline by using a slurry pump, conveying the mixed slurry to an underground filling place by using a slurry pump on the slurry conveying pipeline, fully and uniformly stirring the coal gangue aggregate and the mixed slurry at the underground filling place to form a debris flow-shaped filling slurry, and filling the roadway to be filled by self-flowing under the action of gravity and slurry fluidity by virtue of the natural gradient of the filling roadway.
The coal gangue separation equipment comprises a separation barrel 5, the separation barrel 5 is of a hollow cuboid structure with an opening at the top, a pore plate 6 is fixed on the left side inside the separation barrel 5, the pore plate 6 is of an inclined shape with a high left side and a low right side, the inclination angle is 20-30 degrees, a rotating plate 8 is rotatably connected on the right side inside the separation barrel 5, a stop block 11 is fixed on the right side inside the separation barrel 5, the top of the stop block 11 is attached to the bottom of the rotating plate 8, the left end of the rotating plate 8 is attached to the right end of the pore plate 6, a coal outlet 9 is arranged on the right side of the separation barrel 5 above the rotating plate 8, a first seal plate 10 is rotatably connected on the right side of the separation barrel 5 through a torsion spring, the first seal plate 10 is attracted with the separation barrel 5, the first seal plate 10 covers the coal outlet 9, a gangue outlet 12 is arranged on the right side of the separation barrel 5 below the rotating plate 8, and a second seal plate 13 is rotatably connected on the right side of the separation barrel 5 through the torsion spring, the second sealing plate 13 is attracted with the separating cylinder 5, a gangue guide plate 7 is integrally formed on the right side inside the separating cylinder 5, the ground of the gangue guide plate 7 is also in an inclined shape with a height from left to right, the inclination angle of the gangue guide plate is 25-33 degrees, a partition plate 3 is integrally formed inside the separating cylinder 5 and below the gangue guide plate 7, a transmission shaft 16 is rotatably connected inside the separating cylinder 5 and below the partition plate 3, the left end of the transmission shaft 16 extends to the left side of the separating cylinder 5 and is fixedly provided with a belt pulley 1, the outer side wall of the belt pulley 1 is sleeved with a belt 2, the other end of the belt is sleeved on the driving end of a coal conveying belt, a piston 4 is arranged inside the separating cylinder 5 and above the partition plate 3, water is arranged between the piston 4 and a pore plate 6, a first connecting rod 14 is fixed at the bottom of the piston 4, the bottom end of the first connecting rod 14 penetrates through the partition plate 3 and is rotatably connected with a second connecting rod 15, and a ring body 17 is fixed at the bottom end of the second connecting rod 15, the ring body 17 is sleeved on the outer side wall of the transmission shaft 16 and is rotationally connected with the transmission shaft 16, when the coal conveying belt runs, the transmission shaft 16 is driven to rotate under the action of the belt 2 and the belt pulley 1, the piston is driven to continuously move up and down under the action of the first connecting rod 14 and the second connecting rod 15, so that water can move up and down, coal mines on the pore plate 6 can move up and down under the action of water, coal gangue can be accumulated below and can be accumulated above and slide right due to the fact that the specific gravity of the coal gangue is large and the water can push the rotating plate 8 open, the coal gangue can slide right and abut against the rotating plate 8 to be placed to rotate downwards, and the coal gangue can also slide right, when the water drops, the coal gangue can be accumulated below and can be accumulated above and slide right, after a certain amount of coal and coal gangue is accumulated on the right side, the coal can push the first sealing plate 10 open and fall out from the coal outlet 9, the gangue falls into the gangue guide plate 7 and pushes the second closing plate 13 away to fall out of the gangue outlet 12.
The blending and stirring equipment comprises a stirring tank 18, a gear box 30 is fixed on the upper surface inside the stirring tank 18, a slurry box 21 is fixed on the front surface of the gear box 30, an impeller 22 is rotatably connected inside the slurry box 21, a slurry outlet 20 is fixed at the bottom of the slurry box 21, a slurry inlet 23 is fixed on the left side of the top of the stirring tank 18, the bottom end of the slurry inlet 23 extends into the slurry box 21, the bottom end of the slurry inlet 23 is inclined towards the right, the rear end of the center shaft of the impeller 22 is rotatably connected with the rear surface inside the gear box 30, a driving gear 32 is fixed inside the gear box 30 on the center shaft of the impeller 22, a driven gear 24 is rotatably connected with the rear surface inside the gear box 30, the driven gear 24 is meshed with the driving gear 32, a first gear 25 is rotatably connected with the lower surface inside the gear box 30, and the first gear 25 is meshed with the driven gear 24, the lower surface of the inner part of the gear box 30 is rotatably connected with a second gear 33, the second gear 33 is meshed with the first gear 25, the middle part of the second gear 33 is fixed with a shaft body 31, the outer side wall of the shaft body 31 is symmetrically fixed with stirring blades 19, the rear surface of the inner part of the gear box 30 is rotatably connected with a third gear 26, the third gear 26 is meshed with a driven gear 24, the right side of the inner part of the gear box 30 is rotatably connected with a fourth gear 27, the fourth gear 27 is meshed with the third gear 26, the middle part of the fourth gear 27 is fixed with a crushing roller 29, the right side of the top of the stirring tank 18 is fixed with an aggregate inlet 28, the driving gear 32 and the driven gear 24 have the same wheel diameter, the wheel diameter of the driven gear 24 is 1.5-2 times of the wheel diameter of the first gear 25 and the wheel diameter of the third gear 26, the wheel diameter of the first gear 25 is 2.5-3 times of the wheel diameter of the second gear 33, the wheel diameter of the third gear 26 is 1.5-2 times of the wheel diameter of the fourth gear 27, after the slurry enters the slurry box 23 through the slurry inlet 23, the impeller 22 is pushed to rotate, and simultaneously enters the agitator tank 18 through the slurry outlet 20, the impeller drives the driving gear 32 to rotate, the driven gear 24 to rotate, and drives the first gear 25 and the third gear 26 to rotate, the first gear 25 drives the second gear 33 to rotate, so as to drive the shaft body 31 and the agitating blade 19 to rotate, and simultaneously the third gear 26 drives the fourth gear 27 to rotate, so as to drive the pulverizing roller 29 to rotate, and simultaneously, aggregate enters from the aggregate inlet 28, and under the action of the pulverizing roller 29, the aggregate adhered together can be dispersed, and simultaneously, under the action of the shaft body 31 and the agitating blade 19, the slurry and the aggregate can be uniformly mixed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a coal mine "under three" coal-pressing filling mining system, includes screening piece-rate system and ground slurrying system, its characterized in that: the screening and separating system comprises coal and gangue separating equipment, a crusher and a screening machine; the coal gangue separation equipment is used for separating coal and coal gangue from a coal mine conveyed by a coal conveying belt, the separated coal is conveyed to a thermal power generation system for thermal power generation, the separated coal gangue is conveyed to a crusher for crushing, the crusher is used for crushing the coal gangue separated by the coal gangue separation equipment, slag conveyed by the thermal power generation system and gangue conveyed by a gangue dump to form aggregate, the screening machine is used for screening aggregate with the particle size of less than 3cm, and the aggregate with the particle size of less than 3cm is conveyed to an underground filling place through the gangue conveying belt after being screened; the ground slurrying system includes storage tank, screw conveyer, high-speed pulper, buffer pool, the storage tank is used for storing the mixture of cement and fly ash, screw conveyer is arranged in carrying the material in the storage tank to high-speed pulper, high-speed pulper is arranged in adding water the material (cement, fly ash) that screw conveyer carried and stirs into mixed thick liquid, the buffer pool is used for storing the mixed thick liquid that high-speed pulper preparation was accomplished to the sediment stuff pump through on the thick liquid pipeline will mix the thick liquid and carry to the underground filling place, gangue aggregate and mixed thick liquid are at the underground filling point intensive mixing even formation "mud-rock flow" form and are filled the thick liquid, under gravity and the mobile effect of thick liquid, fill the tunnel that needs to fill through the automatic flow with the help of the natural slope in filling tunnel.
2. The coal mine "under three" briquetting and filling mining system of claim 1, wherein: when the aggregate is screened by the screening machine, the aggregate with the particle size smaller than 3cm can be directly conveyed to a filling place through a gangue conveying belt, and the aggregate with the particle size larger than 3cm can be returned to the crusher to be crushed again until all the aggregate particles are smaller than 3 cm.
3. The coal mine "under three" briquetting and filling mining system of claim 1, wherein: the system also comprises a centralized control system, and the screening and separating system, the ground pulping system, the slurry pump, the coal conveying belt and the gangue conveying belt are in signal connection with the control system.
4. The coal mine "under three" briquetting and filling mining system of claim 1, wherein: the buffer tank is provided with a stirrer, and the discharge port of the storage tank is fixed with an electromagnetic valve.
5. The coal mine "under three" briquetting and filling mining system of claim 1, wherein: the coal gangue separation equipment comprises a separation barrel (5), wherein the separation barrel (5) is of a hollow cuboid structure with an open top, a pore plate (6) is fixed on the left side inside the separation barrel (5), a rotating plate (8) is rotatably connected on the right side inside the separation barrel (5), a stop block (11) is fixed on the right side inside the separation barrel (5), the top of the stop block (11) is attached to the bottom of the rotating plate (8), the left end of the rotating plate (8) is attached to the right end of the pore plate (6), a coal outlet (9) is formed in the position, above the rotating plate (8), of the right side of the separation barrel (5), a first sealing plate (10) is rotatably connected to the right side of the separation barrel (5) through a torsion spring, the first sealing plate (10) is attracted to the separation barrel (5), and the first sealing plate (10) covers the coal outlet (9), the right side of separator cylinder (5) is located the below of rotor plate (8) has been seted up waste rock export (12), just the right side of separator cylinder (5) is rotated through the torsional spring and is connected with second shrouding (13), second shrouding (13) with separator cylinder (5) actuation mutually, the inside right side integrated into one piece of separator cylinder (5) has waste rock guide board (7), the inside of separator cylinder (5) is located the below integrated into one piece of waste rock guide board (7) has baffle (3), the inside of separator cylinder (5) is located the below of baffle (3) is rotated and is connected with transmission shaft (16), the left end of transmission shaft (16) extends to the left side of separator cylinder (5) and is fixed with belt pulley (1), the lateral wall cover of belt pulley (1) is equipped with belt (2), the belt other pot head is in the drive end of fortune coal belt, the inside of cylinder (5) is located the top of baffle (3) is equipped with piston (4), piston (4) with be equipped with water between orifice plate (6), the bottom of piston (4) is fixed with first connecting rod (14), the bottom of first connecting rod (14) is run through baffle (3), and rotate and be connected with second connecting rod (15), the bottom mounting of second connecting rod (15) has ring body (17), ring body (17) cover is located the lateral wall of transmission shaft (16), and with transmission shaft (16) rotate and are connected.
6. The coal mine "under three" briquetting and filling mining system of claim 5, wherein: the pore plate (6) is in an inclined shape with a height from left to right, the inclination angle is 20-30 degrees, the ground of the waste rock guide plate (7) is also in an inclined shape with a height from left to right, and the inclination angle is 25-33 degrees.
7. The coal mine "under three" briquetting and filling mining system of claim 1, wherein: the mixing and stirring equipment comprises a stirring tank (18), a gear box (30) is fixed on the upper surface of the stirring tank (18), a slurry box (21) is fixed on the front surface of the gear box (30), an impeller (22) is connected to the slurry box (21) in a rotating mode, a slurry outlet (20) is fixed on the bottom of the slurry box (21), a slurry inlet (23) is fixed on the left side of the top of the stirring tank (18), the bottom end of the slurry inlet (23) extends to the inside of the slurry box (21), the bottom end of the slurry inlet (23) is in a right-inclined shape, the middle shaft rear end of the impeller (22) is connected with the rear surface of the gear box (30) in a rotating mode, a driving gear (32) is fixed inside the gear box (30) in a middle shaft of the impeller (22), a driven gear (24) is connected to the rear surface of the gear box (30) in a rotating mode, the driven gear (24) is meshed with the driving gear (32), the inner lower surface of the gear box (30) is connected with a first gear (25) in a rotating mode, the first gear (25) is meshed with the driven gear (24) in a rotating mode, the inner lower surface of the gear box (30) is connected with a second gear (33) in a rotating mode, the second gear (33) is meshed with the first gear (25) in a connecting mode, a shaft body (31) is fixed to the middle of the second gear (33), stirring blades (19) are symmetrically fixed to the outer side wall of the shaft body (31), a third gear (26) is connected to the inner rear surface of the gear box (30) in a rotating mode, the third gear (26) is meshed with the driven gear (24) in a connecting mode, a fourth gear (27) is connected to the inner right side of the gear box (30) in a rotating mode, and the fourth gear (27) is meshed with the third gear (26), and a crushing roller (29) is fixed in the middle of the fourth gear (27), and an aggregate inlet (28) is fixed on the right side of the top of the stirring tank (18).
8. The coal mine "under three" briquetting and filling mining system of claim 7, wherein: the wheel diameters of the driving gear (32) and the driven gear (24) are the same, the wheel diameter of the driven gear (24) is 1.5-2 times of the wheel diameters of the first gear (25) and the third gear (26), the wheel diameter of the first gear (25) is 2.5-3 times of the wheel diameter of the second gear (33), and the wheel diameter of the third gear (26) is 1.5-2 times of the wheel diameter of the fourth gear (27).
9. A coal mine 'under three' coal-pressing filling mining method is characterized in that: the method comprises the following steps:
s1, constructing a roadway through a continuous mining machine or a fully mechanized mining machine, and transporting the mined coal to a screening and separating system by using a coal transporting belt;
s2, separating gangue from coal by coal gangue separation equipment in the screening and separating system, conveying the separated coal to a thermal power generation system for thermal power generation, conveying the separated gangue to a crusher for crushing, conveying slag generated by the thermal power generation system and gangue generated by a gangue dump to the crusher for crushing, and forming filling aggregate;
s3, conveying the aggregates formed after crushing by the crusher to a screening machine in a screening and separating system for screening, conveying the aggregates with the particle size of less than 3cm to a filling place through a gangue conveying belt after screening the aggregates with the particle size of more than 3cm, and returning the aggregates with the particle size of more than 3cm to the crusher for crushing again until the particle sizes of all the aggregates screened by the screening machine are less than 3 cm;
s4, simultaneously conveying the cement and the fly ash in the storage tank in the ground pulping system into a high-speed pulping machine by a screw conveyor to prepare mixed slurry, and introducing the prepared mixed slurry into a buffer tank;
and S5, pumping the mixed slurry in the buffer tank into a slurry conveying pipeline by using a slurry pump, conveying the slurry to an underground filling place through the slurry conveying pipeline, fully and uniformly stirring the coal gangue aggregate and the mixed slurry at the underground filling place to form a debris flow-shaped filling slurry, and filling the roadway to be filled through self-flow under the action of gravity and slurry fluidity by virtue of the natural gradient of the filling roadway.
CN202111499383.8A 2021-12-09 2021-12-09 Coal mine 'three-lower' coal pressing filling mining system and method Active CN114151085B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870237A (en) * 1974-02-14 1975-03-11 Univ Syracuse Res Corp Chemical comminution of coal and removal of ash including sulfur in inorganic form therefrom
AU5108979A (en) * 1978-09-23 1980-04-03 M.A.N. Maschinenfabrik Augsberg-Nurnberg Aktiengesselschaft Mineral separation
CN107246279A (en) * 2017-07-11 2017-10-13 太原理工大学 Underground selecting and purchasing sieve, which is mixed, fills the cementing construction filling system of integrated spoil and method
CN111365067A (en) * 2020-03-24 2020-07-03 山东康格能源科技有限公司 Paste filling mining method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870237A (en) * 1974-02-14 1975-03-11 Univ Syracuse Res Corp Chemical comminution of coal and removal of ash including sulfur in inorganic form therefrom
AU5108979A (en) * 1978-09-23 1980-04-03 M.A.N. Maschinenfabrik Augsberg-Nurnberg Aktiengesselschaft Mineral separation
CN107246279A (en) * 2017-07-11 2017-10-13 太原理工大学 Underground selecting and purchasing sieve, which is mixed, fills the cementing construction filling system of integrated spoil and method
CN111365067A (en) * 2020-03-24 2020-07-03 山东康格能源科技有限公司 Paste filling mining method

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