CN114934772B - Deep coal fluidization exploitation in-situ gasification device - Google Patents
Deep coal fluidization exploitation in-situ gasification device Download PDFInfo
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- CN114934772B CN114934772B CN202210749263.7A CN202210749263A CN114934772B CN 114934772 B CN114934772 B CN 114934772B CN 202210749263 A CN202210749263 A CN 202210749263A CN 114934772 B CN114934772 B CN 114934772B
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- 239000003245 coal Substances 0.000 title claims abstract description 31
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 238000002309 gasification Methods 0.000 title claims abstract description 27
- 238000005243 fluidization Methods 0.000 title abstract description 10
- 238000005065 mining Methods 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims description 42
- 238000009434 installation Methods 0.000 claims description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000007569 slipcasting Methods 0.000 description 19
- 230000006872 improvement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
The invention discloses a deep coal fluidization exploitation in-situ gasification device which comprises an exploitation vehicle, exploitation crushing equipment, in-situ gasification equipment, filling conveying equipment and grouting filling equipment, wherein the upper end of the exploitation vehicle is fixedly connected with a base, the front end of the base is provided with a containing groove, a forward-extending oil cylinder is fixedly arranged inside the containing groove, the telescopic end of the forward-extending oil cylinder is fixedly connected with an extending plate, the exploitation crushing equipment is arranged at the upper end of the extending plate, the in-situ gasification equipment, the filling conveying equipment and the grouting filling equipment are all arranged at the upper end of the base, and a moving frame is arranged above the grouting filling equipment. The invention can flexibly adjust the position and the orientation of the grouting head according to the requirement of the actual grouting filling position, does not need the mining vehicle to turn around in the mining area, greatly facilitates the grouting filling operation of the mining area and is beneficial to the operation and the moving-out of the mining vehicle in the mining area.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a deep coal fluidization mining in-situ gasification device.
Background
At present, 80% of coal mines in China are mined by adopting underground mining, and the coal mining method has the defects of low mining rate, more reserved coal pillars, high supporting cost, poor safety, low economic benefit and the like. With the gradual completion of the mining of the shallow high-quality thick coal seam, the defects of the traditional underground mining are increasingly prominent in the environments of thin coal seams, deep coal seams, "third lower" coal pressing, high-sulfur and high-gas coal seams and the like with poor economy and safety. Aiming at the safety problem and the economic problem exposed in the process of mining the deep coal resources, a group of scholars provide a method for in-situ fluidized mining of the deep coal resources, and the core idea is to convert the deep solid mineral resources into fluidized resources such as gas state, liquid state, gas-solid mixed state and the like in situ and perform grouting filling on a rear goaf.
However, when the mining vehicle carries out grouting filling on a rear goaf at present, a grouting head of grouting filling equipment is usually fixed at the rear end of the mining vehicle, so that grouting is not convenient and fast in actual use, and when the mining vehicle needs to be moved out of a mining area, the mining vehicle needs to turn around to carry out grouting on a final goaf, so that the mining vehicle is not convenient and fast to use.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an in-situ gasification device for fluidized mining of deep coal.
In order to achieve the purpose, the invention adopts the following technical scheme:
the deep coal fluidization exploitation in-situ gasification device comprises an exploitation vehicle, exploitation crushing equipment, in-situ gasification equipment, filling conveying equipment and grouting filling equipment, wherein a base is fixedly connected to the upper end of the exploitation vehicle, a storage tank is arranged at the front end of the base, a protrusive oil cylinder is fixedly mounted inside the storage tank, a stretching plate is fixedly connected to the telescopic end of the protrusive oil cylinder, the exploitation crushing equipment is mounted at the upper end of the stretching plate, the in-situ gasification equipment, the filling conveying equipment and the grouting filling equipment are mounted at the upper end of the base, a movable frame is arranged above the grouting filling equipment, a grouting head connected with the grouting filling equipment is arranged above the movable frame, first mounting grooves are formed in the outer walls of two sides of the exploitation vehicle, moving mechanisms are arranged in the first mounting grooves, the moving mechanisms are connected to two sides of the lower end of the movable frame respectively, an installation cavity is arranged inside the exploitation vehicle, a driving mechanism connected with the moving mechanism is arranged inside the installation cavity, a rotary column rotatably connected with the movable frame is arranged at the top of the movable frame in a penetrating manner, a transverse moving mechanism connected with the upper end of the rotary column is mounted at the upper end of the rotary column, and a rotating mechanism connected with the rotary column is arranged on the inner side of the movable frame.
As a further improvement of the invention, the moving mechanism comprises a first threaded rod arranged in the first mounting groove, one end of the first threaded rod is rotatably connected to the inner wall of the first mounting groove, the other end of the first threaded rod is fixedly connected with a rotating shaft, one end of the rotating shaft, which is far away from the first threaded rod, penetrates through the inner wall of the first mounting groove, extends into the mounting cavity and is rotatably connected to the inner wall of the mounting cavity, a movable block is sleeved on the first threaded rod in a threaded manner, and the movable block is fixedly connected to the lower end of the moving frame.
As a further improvement of the present invention, the driving mechanism includes a first motor fixedly installed in the installation cavity, the first motor is a dual-shaft motor, two output shafts of the first motor are both fixedly connected with a connecting shaft, one end of the connecting shaft away from the first motor is rotatably connected to the inner wall of the installation cavity, a worm wheel is fixedly sleeved on the rotating shaft, a worm is fixedly sleeved on the connecting shaft, and the worm is meshed with the worm wheel.
As a further improvement of the invention, the traversing mechanism comprises an installation plate fixedly connected to the upper end of the rotary column, the lower end of the installation plate is provided with a second installation groove, a second threaded rod is arranged inside the second installation groove, two ends of the second threaded rod are rotatably connected to the inner wall of the second installation groove, a second motor is fixedly installed on the outer side wall of the installation plate, an output shaft of the second motor penetrates through the installation plate and is fixedly connected to the end part of the second threaded rod, a moving block is sleeved on the second threaded rod in a threaded manner, and the grouting head is fixedly installed at the lower end of the moving block.
As a further improvement of the invention, the rotating mechanism comprises a fixed plate fixedly connected to the inner wall of the moving frame, a third motor is fixedly mounted at the upper end of the fixed plate, a driving gear is fixedly connected to the tail end of an output shaft of the third motor, a driven gear is fixedly connected to the lower end of the rotating column, and the driven gear is meshed with the driving gear.
As a further improvement of the invention, the diameter of the driven gear is larger than that of the driving gear.
As a further improvement of the invention, the movable block is of an L-shaped structure.
As a further development of the invention, the bottom of the mining vehicle is provided with a movement assembly.
The invention has the beneficial effects that:
through setting up sideslip mechanism, through starting the second motor, drive second threaded rod rotates, because movable block and second threaded rod threaded connection, can drive the movable block and remove in the second mounting groove, and then drive the slip casting head and remove, can adjust the slip casting head position according to the slip casting needs.
Through setting up rotary mechanism, through starting the third motor, the drive driving gear rotates, because driving gear and driven gear meshing, can drive the rotary column and rotate, and then drive the mounting panel and rotate, and then drive the slip casting head through the mounting panel and rotate, adjust the orientation position of slip casting head.
Through setting up moving mechanism, actuating mechanism, through starting first motor, two worms of drive rotate, because worm and worm wheel meshing, two first threaded rods of synchronous drive rotate, movable block and first threaded rod threaded connection can drive the movable block and remove, drive the antedisplacement of removal frame, and then drive the slip casting head antedisplacement, need not the mining car and turn around in the mining area, can accomplish the slip casting operation to the front portion of mining car, lateral part, greatly made things convenient for the operation of filling of mining area slip casting.
The invention can flexibly adjust the position and the orientation of the grouting head according to the requirement of the actual grouting filling position, does not need the mining vehicle to turn around in the mining area, greatly facilitates the grouting filling operation of the mining area and is beneficial to the operation and the moving-out of the mining vehicle in the mining area.
Drawings
FIG. 1 is a schematic structural diagram of an in-situ gasification device for deep coal fluidization mining, which is provided by the invention;
FIG. 2 is a schematic structural diagram of a cross-sliding mechanism of the deep coal fluidization mining in-situ gasification device provided by the invention;
FIG. 3 is a schematic structural diagram of a moving mechanism and a driving mechanism of the deep coal fluidization mining in-situ gasification device provided by the invention;
FIG. 4 shows the deep coal fluidization provided by the present invention the structural schematic diagram of a rotating mechanism of the in-situ gasification device is exploited;
fig. 5 is a schematic structural diagram of a movable block of the deep coal fluidization mining in-situ gasification device provided by the invention.
In the figure: 1 mining vehicle, 2 extension board, 3 mining crushing equipment, 4 normal position gasification equipment, 5 storage tanks, 6 removal subassemblies, 7 filling conveying equipment, 8 mounting panels, 9 slip casting head, 10 rotary columns, 11 removal frame, 12 slip casting filling equipment, 13 bases, 14 first mounting grooves, 15 movable blocks, 16 first threaded rods, 17 forward extending oil cylinders, 18 mounting cavities, 19 connecting shafts, 20 first motors, 21 worms, 22 worm gears, 23 rotating shafts, 24 second motors, 25 moving blocks, 26 second threaded rods, 27 second mounting grooves, 28 driven gears, 29 driving gears, 30 third motors and 31 fixing plates.
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.
Referring to fig. 1-5, an in-situ gasification device for deep coal fluidized mining comprises a mining vehicle 1, mining crushing equipment 3, in-situ gasification equipment 4, filling conveying equipment 7 and grouting filling equipment 12, wherein a moving component 6 is arranged at the bottom of the mining vehicle 1, a base 13 is fixedly connected to the upper end of the mining vehicle 1, a containing groove 5 is formed in the front end of the base 13, a forward extending oil cylinder 17 is fixedly mounted inside the containing groove 5, an extending plate 2 is fixedly connected to the telescopic end of the forward extending oil cylinder 17, the mining crushing equipment 3 is mounted at the upper end of the extending plate 2, the in-situ gasification equipment 4, the filling conveying equipment 7 and the grouting filling equipment 12 are mounted at the upper end of the base 13, a moving frame 11 is arranged above the grouting filling equipment 12, a grouting head 9 connected with the grouting filling equipment 12 is arranged above the moving frame 11, first mounting grooves 14 are formed in the outer walls of two sides of the mining vehicle 1, moving mechanisms are arranged in the two first mounting grooves 14, the two moving mechanisms are respectively connected to two sides of the lower end of the moving frame 11, a mounting cavity 18 is formed in the mining vehicle 1, a driving mechanism connected to the mounting cavity 18 is arranged on the inner side of the moving mechanism, a rotating mechanism connected to the moving frame 11, a rotating mechanism 10 connected to a rotating column 10 is arranged at the top of the moving frame 11, and a rotating mechanism 10 connected to the rotating column 10, and a rotating mechanism 10 connected to the rotating mechanism 10 of the rotating mechanism 10, and a rotating mechanism 10 connected to the rotating column 10 are arranged on the moving frame 11.
In the invention, the moving mechanism comprises a first threaded rod 16 arranged in a first mounting groove 14, one end of the first threaded rod 16 is rotatably connected on the inner wall of the first mounting groove 14, the other end of the first threaded rod 16 is fixedly connected with a rotating shaft 23, one end of the rotating shaft 23 far away from the first threaded rod 16 penetrates through the inner wall of the first mounting groove 14 to extend into the mounting cavity 18 and is rotatably connected on the inner wall of the mounting cavity 18, a movable block 15 is sleeved on the first threaded rod 16 in a threaded manner, the movable block 15 is of an L-shaped structure, the movable block 15 is fixedly connected at the lower end of the moving frame 11, the driving mechanism comprises a first motor 20 fixedly arranged in the mounting cavity 18, the first motor 20 is a double-shaft motor, two output shafts of the first motor 20 are both fixedly connected with a connecting shaft 19, one end of the connecting shaft 19, far away from the first motor 20, is rotatably connected to the inner wall of the mounting cavity 18, a worm wheel 22 is fixedly sleeved on the rotating shaft 23, a worm 21 is fixedly sleeved on the connecting shaft 19, the worm 21 is meshed with the worm wheel 22, the two worms 21 are driven to rotate by starting the first motor 20, the worm 21 is meshed with the worm wheel 22, the two first threaded rods 16 can be synchronously driven to rotate, the movable block 15 is in threaded connection with the first threaded rods 16, the movable block 15 can be driven to move, the movable frame 11 is driven to move forwards, the grouting head 9 is further driven to move forwards, the mining vehicle 1 does not need to turn around in a mining area, grouting operation can be completed on the front part and the side part of the mining vehicle 1, and grouting filling operation in the mining area is greatly facilitated.
The sideslip mechanism includes mounting panel 8 of fixed connection in the rotary column 10 upper end, the lower extreme of mounting panel 8 is equipped with second mounting groove 27, the inside of second mounting groove 27 is equipped with second threaded rod 26, the both ends of second threaded rod 26 are all rotated and are connected on the inner wall of second mounting groove 27, fixed mounting has second motor 24 on the lateral wall of mounting panel 8, second motor 24 output shaft runs through mounting panel 8 and fixed connection is at the tip of second threaded rod 26, the threaded sleeve is equipped with movable block 25 on the second threaded rod 26, slip casting head 9 fixed mounting is at the lower extreme of movable block 25, through starting second motor 24, drive second threaded rod 26 rotates, because movable block 25 and second threaded rod 26 threaded connection, can drive movable block 25 and remove in second mounting groove 27, and then drive slip casting head 9 and remove, can adjust slip casting head 9 position according to the slip casting needs.
The rotating mechanism comprises a fixing plate 31 fixedly connected to the inner wall of the moving frame 11, a third motor 30 is fixedly mounted at the upper end of the fixing plate 31, a driving gear 29 is fixedly connected to the tail end of an output shaft of the third motor 30, a driven gear 28 is fixedly connected to the lower end of the rotary column 10, the driven gear 28 is meshed with the driving gear 29, the diameter of the driven gear 28 is larger than that of the driving gear 29, the third motor 30 is started, the driving gear 29 is driven to rotate, the rotary column 10 can be driven to rotate due to the fact that the driving gear 29 is meshed with the driven gear 28, the mounting plate 8 is further driven to rotate, the grouting head 9 is further driven to rotate through the mounting plate 8, and the orientation position of the grouting head 9 is adjusted.
When the invention is used, a mined coal seam is excavated through the mining crushing device 3, the coal seam is crushed inside the mining crushing device and then is conveyed to the in-situ gasification device 4 for in-situ gasification, the coal is converted into a gaseous resource form in the filling conveying device 7 and is conveyed to the underground transfer station and then is conveyed to the ground, the goaf of the coal seam is filled and grouted through the grouting filling device 12 and the grouting head 9, the second threaded rod 26 is driven to rotate by starting the second motor 24, the moving block 25 can be driven to move in the second mounting groove 27 due to the threaded connection of the moving block 25 and the second threaded rod 26, so as to drive the grouting head 9 to move, the position of the grouting head 9 can be adjusted according to grouting requirements, and by starting the first motor 20, two worms 21 of drive rotate, because worm 21 and worm wheel 22 mesh, can two first threaded rod 16 rotations of synchronous drive, movable block 15 and first threaded rod 16 threaded connection, can drive movable block 15 and remove, drive and remove frame 11 antedisplacement, and then drive slip casting head 9 antedisplacement, need not mining car 1 and turn around in the district of exploitation, can be to mining car 1 front portion, slip casting operation is accomplished to the lateral part, the operation of mining district slip casting packing has greatly been made things convenient for, through starting third motor 30, drive driving gear 29 rotates, because driving gear 29 and driven gear 28 mesh, can drive rotary column 10 and rotate, and then drive mounting panel 8 and rotate, and then drive slip casting head 9 through mounting panel 8 and rotate, adjust slip casting head 9's orientation position.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (4)
1. The deep coal fluidized mining in-situ gasification device comprises a mining vehicle (1), mining crushing equipment (3), in-situ gasification equipment (4), filling conveying equipment (7) and grouting filling equipment (12), and is characterized in that the upper end of the mining vehicle (1) is fixedly connected with a base (13), the front end of the base (13) is provided with a containing groove (5), a forward extending oil cylinder (17) is fixedly arranged inside the containing groove (5), a telescopic end of the forward extending oil cylinder (17) is fixedly connected with an extending plate (2), the mining crushing equipment (3) is arranged at the upper end of the extending plate (2), the in-situ gasification equipment (4), the filling conveying equipment (7) and the grouting filling equipment (12) are all arranged at the upper end of the base (13), a moving frame (11) is arranged above the grouting filling equipment (12), grouting heads (9) connected with the grouting filling equipment (12) are arranged above the moving frame (11), the outer walls of two sides of the mining vehicle (1) are respectively provided with first mounting grooves (14), two first mounting grooves (14) are internally provided with two moving mounting grooves (18), the two moving frames (18) are respectively connected with a driving mechanism (18), and a driving mechanism (18) is arranged at the lower end of the moving frame (18) and a driving mechanism (18) is arranged at the inner side of the mining vehicle, a rotating column (10) rotatably connected with the moving frame (11) penetrates through the top of the moving frame (11), a transverse moving mechanism connected with the grouting head (9) is installed at the upper end of the rotating column (10), and a rotating mechanism connected with the rotating column (10) is arranged on the inner side of the moving frame (11);
the moving mechanism comprises a first threaded rod (16) arranged in a first mounting groove (14), one end of the first threaded rod (16) is rotatably connected to the inner wall of the first mounting groove (14), the other end of the first threaded rod (16) is fixedly connected with a rotating shaft (23), one end, far away from the first threaded rod (16), of the rotating shaft (23) penetrates through the inner wall of the first mounting groove (14) to extend into the mounting cavity (18) and is rotatably connected to the inner wall of the mounting cavity (18), a moving block (15) is sleeved on the first threaded rod (16) in a threaded manner, and the moving block (15) is fixedly connected to the lower end of the moving frame (11);
the driving mechanism comprises a first motor (20) fixedly installed in the installation cavity (18), the first motor (20) is a double-shaft motor, two output shafts of the first motor (20) are fixedly connected with connecting shafts (19), one end, far away from the first motor (20), of each connecting shaft (19) is rotatably connected to the inner wall of the installation cavity (18), a worm wheel (22) is fixedly sleeved on each rotating shaft (23), a worm (21) is fixedly sleeved on each connecting shaft (19), and the worm (21) is meshed with the worm wheel (22);
the transverse moving mechanism comprises a mounting plate (8) fixedly connected to the upper end of a rotary column (10), a second mounting groove (27) is formed in the lower end of the mounting plate (8), a second threaded rod (26) is arranged inside the second mounting groove (27), two ends of the second threaded rod (26) are rotatably connected to the inner wall of the second mounting groove (27), a second motor (24) is fixedly mounted on the outer side wall of the mounting plate (8), an output shaft of the second motor (24) penetrates through the mounting plate (8) and is fixedly connected to the end portion of the second threaded rod (26), a moving block (25) is sleeved on the second threaded rod (26) in a threaded mode, and the grouting head (9) is fixedly mounted at the lower end of the moving block (25);
rotary mechanism includes fixed plate (31) of fixed connection on removing frame (11) inner wall, the upper end fixed mounting of fixed plate (31) has third motor (30), third motor (30) output shaft end fixedly connected with driving gear (29), the lower extreme fixedly connected with driven gear (28) of rotary column (10), driven gear (28) and driving gear (29) meshing.
2. The deep coal fluidized mining in-situ gasification device according to claim 1, characterized in that the diameter of the driven gear (28) is larger than that of the driving gear (29).
3. The deep coal fluidized mining in-situ gasification device according to claim 1, wherein the movable block (15) is of an L-shaped structure.
4. The deep coal fluidized mining in-situ gasification device according to claim 1, characterized in that the bottom of the mining vehicle (1) is provided with a moving assembly (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210749263.7A CN114934772B (en) | 2022-06-29 | 2022-06-29 | Deep coal fluidization exploitation in-situ gasification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210749263.7A CN114934772B (en) | 2022-06-29 | 2022-06-29 | Deep coal fluidization exploitation in-situ gasification device |
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| Publication Number | Publication Date |
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| CN114934772A CN114934772A (en) | 2022-08-23 |
| CN114934772B true CN114934772B (en) | 2023-03-24 |
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| CN202210749263.7A Active CN114934772B (en) | 2022-06-29 | 2022-06-29 | Deep coal fluidization exploitation in-situ gasification device |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222938B (en) * | 2018-02-07 | 2020-01-03 | 西安科技大学 | Combined grouting filling mining method for large-inclination-angle coal seam goaf |
| CN111997612B (en) * | 2020-07-24 | 2021-07-06 | 中国矿业大学 | Deep mine geothermal energy and coal resource fluidization collaborative mining method |
| CN113153300B (en) * | 2021-05-13 | 2023-02-14 | 贵州理工学院 | Comprehensive coal mining device and method based on high-water filling material |
| CN113404490B (en) * | 2021-06-27 | 2022-02-18 | 中国矿业大学 | Deep coal fluidization pipeline conveying system |
| CN113338934B (en) * | 2021-07-07 | 2023-12-08 | 中国矿业大学 | Deep coal fluidization exploitation in-situ gasification device |
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