CN107131000B - Intelligent jet filling mining equipment for underground coal mine - Google Patents
Intelligent jet filling mining equipment for underground coal mine Download PDFInfo
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- CN107131000B CN107131000B CN201710487390.3A CN201710487390A CN107131000B CN 107131000 B CN107131000 B CN 107131000B CN 201710487390 A CN201710487390 A CN 201710487390A CN 107131000 B CN107131000 B CN 107131000B
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- 239000003245 coal Substances 0.000 title claims abstract description 48
- 238000005065 mining Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 23
- 239000010881 fly ash Substances 0.000 abstract description 5
- 239000004568 cement Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009941 weaving Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000010878 waste rock Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
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- 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
- E21F15/08—Filling-up hydraulically or pneumatically
- E21F15/10—Hydraulic or pneumatic filling-up machines
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses an underground intelligent injection filling mining device for a coal mine, which comprises a filling pump, a distributing pipe, a filling support, a steel tank chain, an intelligent self-moving trolley, a traction arm, a mechanical arm, a compressed air hose, an electric gate valve, a cyclone, an accelerator pump, an accelerator conveying hose and the like. When the coal gangue and fly ash combined filling device works, coal gangue, fly ash, cement and water are mixed in proportion to prepare slurry with high quality and concentration, and the slurry is conveyed into a goaf behind a support through a steel pipe-weaving pump arranged in a steel tank chain by using a filling pump; steel tank chain removal portion is connected with the trailing arm on the intelligent formula dolly that moves certainly, and distributing pipe export fixed plate is connected with the arm fixed plate of arm, and intelligent formula dolly and the steel tank chain that moves certainly all moves on support bottom layer board, and intelligent formula dolly that moves certainly drives the steel tank chain and removes about, and the arm drives the terminal reciprocating of distributing pipe and does the swing of small-amplitude, realizes that the full section in collecting space area sprays and fills.
Description
Technical Field
The invention belongs to the technical field of mining engineering, and particularly relates to underground intelligent jet-filling mining equipment for a coal mine.
Background
The underground coal mine can produce a large amount of waste rocks in the process of construction and production, and the traditional mode is that directly pile up on the earth's surface, and the accumulational waste rock of earth's surface forms the hillock, brings very big harm to mining area ecological environment, also has great potential safety hazard simultaneously. The gangue underground filling technology is an important technology attack direction for green sustainable development of modern mines.
At present, the main methods of filling mining are as follows: the patent discloses a coal mine underground intelligent jet filling mining mode and a corresponding equipment arrangement mode.
The existing wind filling method mainly utilizes high-pressure air generated by a fan to convey fine dry (damp) materials to a goaf through a pipeline. The method has the following problems in practical engineering application:
1. the treatment capacity per unit time is small (less than 70 t/h), and the method cannot be applied to large mines;
2. the dust is high during operation, the working environment of workers is poor, the incidence rate of pneumoconiosis of workers on site is increased, the prevention and the control of working flour dust are not facilitated, the risk of dust explosion is increased, and other adverse factors are avoided.
The existing paste filling method mainly utilizes a filling pump (or a concrete pump) to pump prepared paste into a gob behind a working face through a pipeline, and the paste flows into the gob at the tail end of the pipeline in a low-flow-rate mode in the process, so that the mode has the following problems:
1. during filling operation, a hydraulic support is used as a retaining wall, and necessary measures for preventing slurry from running are taken, so that the purpose of roof contact is achieved, and dense filling is realized. At present, the pulp leakage prevention measure is usually realized by erecting a special mechanism, and the pulp leakage prevention mechanism needs to be erected, so that the operation link of filling operation is increased, and the filling efficiency is reduced.
2. Paste at the tail end of the pipeline flows into the goaf in a low-flow-rate mode, and after the paste is connected with the roof and solidified, the next goaf area can be filled, so that the filling and mining efficiency is reduced. At present, the maximum yield of the paste filling mining working face in China is less than 1.0Mt/a.
Disclosure of Invention
The invention aims to provide the underground intelligent jet filling mining equipment for the coal mine, which reduces the influence of filling operation on coal mining operation, ensures the efficient operation of a filling mining working face and realizes intelligent filling on the premise of meeting the requirements of safety and environmental protection.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
an underground intelligent injection filling mining device for a coal mine comprises a filling support, a filling pump, a steel braided tube, a straight tube seat, a 90-degree wear-resistant elbow, a distributing tube, a steel tank chain, an intelligent self-moving trolley, a traction arm, a mechanical arm, a cyclone, a compressed air hose, an electric gate valve, an accelerator pump and an accelerator conveying hose; wherein,
the filling pump and the accelerator pump are both arranged in the working face air return roadway, the outlet of the filling pump is connected with a steel braided tube, the tail end of the steel braided tube is fixed on a first group of filling supports of the working face air return roadway through a straight tube seat, and the straight tube seat is connected with a 90-degree wear-resistant elbow through a flange; the 90-degree wear-resistant elbow is connected with the distributing pipe;
the distributing pipe, the compressed air hose, the accelerator conveying hose and the control cable are all wrapped in a steel tank chain; the steel tank chain fixing part is fixed on a bottom supporting plate of a first group of filling supports of a working face air return roadway, and the steel tank chain moving part is connected with a traction arm on the intelligent self-moving trolley; a swirler is additionally arranged on the distributing pipe close to the moving part of the steel tank chain; reserving a distribution pipe with the length of 2-4 m at the tail end of the swirler, and arranging a distribution pipe outlet fixing plate near an outlet of the distribution pipe;
a bottom supporting plate is arranged at the rear lower part of the filling support, and a front baffle, a middle baffle and a rear baffle are arranged on the bottom supporting plate; the bottom supporting plate is also provided with two magnetic stripes in the area between the middle baffle and the rear baffle, and the two magnetic stripes are used for the autonomous navigation of the intelligent self-moving trolley;
a traction arm and a mechanical arm are fixed at the upper part of the intelligent self-moving trolley; the bottom of the traction arm is fixed on the intelligent self-moving trolley, and the other end of the traction arm is connected with the steel tank chain moving part through a bolt; the bottom of the mechanical arm is fixed on the intelligent self-moving trolley, and the mechanical arm fixing plate is connected with the distributing pipe outlet fixing plate through a bolt;
the compressed air hose is connected with a compressed air pipeline in the well, and an electric gate valve is arranged at an interface; the compressed air hose is fixed on the first group of filling supports of the return airway of the working face through the straight pipe seat, and the compressed air hose is wrapped in the steel tank chain;
the cyclone consists of a section of wear-resistant steel pipe and two external spiral pipelines wound on the wear-resistant steel pipe; the tail end of the compressed air hose is connected with one external spiral pipeline of the cyclone, one end of the accelerator delivery hose is connected with the accelerator pump, and the other end of the accelerator delivery hose is connected with the other external spiral pipeline of the cyclone.
The invention is further improved in that the straight pipe seat and the 90-degree wear-resistant elbow are both made of double-layer metal wear-resistant pipes.
The invention is further improved in that bolt holes are arranged on two sides of the rear baffle plate, and a rubber soft plate is fixed between two adjacent rear baffle plates by using bolts.
The invention is further improved in that the distance between the front baffle and the middle baffle is not less than the sum of the width of the steel tank chain and the step pitch of the moving frame, and the area is the running area of the steel tank chain; the distance between the middle baffle and the rear baffle is not less than the width of the intelligent self-moving trolley body, a safety gap is reserved, and the area is a walking area of the intelligent self-moving trolley.
The invention is further improved in that the heights of the front baffle and the middle baffle are both larger than the bending radius of the steel tank chain, so as to ensure the operation of the related supporting device of the rear tail beam.
The invention is further improved in that the filling pump is provided with a filling pump receiving hopper.
The invention has the following beneficial effects:
the invention provides intelligent injection filling mining equipment for an underground coal mine, which comprises a filling support, a filling pump, a steel braided pipe, a straight pipe seat, a 90-degree wear-resistant elbow, a steel tank chain, an intelligent self-moving trolley, a distributing pipe, a traction arm, a mechanical arm, a compressed air hose, an electric gate valve, an accelerator pump, an accelerator conveying hose and the like. When the device works, coal gangue, coal ash, cement and water are mixed in proportion to prepare slurry with high quality concentration, the slurry is sent into a goaf behind a support through a steel pipe-weaving pump arranged in a steel tank chain by using a filling pump, an accelerator pump and an accelerator conveying hose convey an accelerator into a cyclone, a compressed air hose conveys compressed air into the cyclone, and the slurry is mixed with the accelerator under the drive of the compressed air in spiral motion; steel tank chain removal portion is connected with the intelligent trailing arm on the formula dolly that moves certainly, and distributing pipe export fixed plate is connected with the arm fixed plate of arm, and intelligent formula dolly and the steel tank chain that moves certainly all move on support bottom layer board, and intelligent formula dolly that moves certainly drives the steel tank chain and removes about, and the arm drives the terminal reciprocating of distributing pipe and does the swing of small amplitude, realizes that the full section in collecting space area sprays and fills. In particular, there are several advantages:
1. the filling pump adopts a constant pressure output design to ensure that the outlet pressure of the distributing pipe is 1-5 MPa; a swirler is additionally arranged on the distributing pipe near the moving part of the steel tank chain, and rotary compressed air and an accelerating agent are injected into the distributing pipe, so that slurry can be sprayed into a goaf; the slurry can be tightly attached to a filling body of the gob under the action of an accelerator, a cyclone and higher outlet pressure, can be finally solidified within 10 minutes, has certain pressure bearing capacity, avoids the necessary compaction top contact and coagulation waiting procedures when flowing into the gob in a low-flow-rate mode, simplifies the filling operation procedure and improves the filling mining efficiency.
2. The distribution pipe moves in the goaf at the rear part of the working surface in a mode that the steel tank chain wraps the distribution pipe, and the traction force in the moving process is borne by the steel tank chain, so that the service life of the distribution pipe is prolonged; secondly, the form that the cloth pipe was wrapped up in to steel tank chain also is favorable to controlling the vibrations that the cloth pipe produced when the high pressure condition moved, prevents that the cloth pipe from striking the support and producing the damage.
3. The intelligent self-moving trolley is adopted, on one hand, the intelligent self-moving trolley has the functions of sensor rail navigation and ultrasonic radar autonomous obstacle avoidance, and is provided with industrial rocker handheld equipment, so that the autonomous reciprocating movement during normal filling operation and the manual navigation function under special conditions are realized; on the other hand, the mechanical arm carried by the intelligent trolley can drive the outlet of the distributing pipe to move up and down and to circumferentially swing in a small amplitude. Therefore, the full-section dense injection filling in the goaf behind the working face can be realized, roof contact can be realized in the injection process, and the filling efficiency is greatly improved.
4. When the system normally operates, filling operation can be performed in parallel with coal mining operation, and the annual yield of a mine is not influenced.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a schematic cross-sectional layout of the present invention.
Figure 3 is a schematic view of the filling stand of the present invention.
Fig. 4 is a schematic view of the installation of the tank chain and the distribution pipe of the invention.
Fig. 5 is a schematic view of an intelligent self-propelled trolley, a mechanical arm and a draft arm of the present invention.
FIG. 6 is a schematic view of a cyclone of the present invention.
Fig. 7 is a schematic view of the connection of the rear fender and the rubber soft board of the invention.
In the figure: 1. filling a bracket; 2. a filling pump; 3. weaving a steel pipe; 4. a straight tube seat; 5. a 90-degree wear-resistant elbow; 6. a steel tank chain; 7. an intelligent self-moving trolley; 8. a rear tail beam; 9. a bottom pallet; 10. a front baffle; 11. a middle baffle; 12. a rear baffle; 13. a distributing pipe; 14. a trailing arm; 15. a mechanical arm; 16. a magnetic strip; 17. a steel tank chain moving part; 18. a swirler; 19. a steel tank chain fixing part; 20. a mechanical arm fixing plate; 21. a distributing pipe outlet fixing plate; 22. a receiving hopper of a filling pump; 23. a downhole compressed air line; 24. an electric gate valve; 25. a compressed air hose; 26. an external helical conduit; 27. a rubber soft board; 28. an accelerator pump; 29. an accelerator delivery hose; 30. a coal mining machine.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, which are not intended to limit the scope of the invention.
As shown in fig. 1 and 4, the filling pump 2 is arranged in the return airway of the working face and is about 100m away from the end of the working face; the outlet of the filling pump 2 is connected with the steel braided tube 3, and the steel braided tube 3 can keep a certain bending under the high-pressure condition; the tail end of the steel braided tube 3 is fixed on the first group of filling supports 1 of the return airway of the working face through a straight tube seat 4, and the straight tube seat 4 is connected with a 90-degree wear-resistant elbow 5 through a flange; the 90-degree wear-resistant elbow 5 is connected with the distributing pipe 13. During operation, the prepared slurry is fed into the receiving hopper 22 of the filling pump. The filling pump 2 adopts a constant pressure output design, and the pressure is set according to the actual condition of the system and ensures that the pressure at the outlet of the distributing pipe is 1-5 MPa, so as to realize the effect of spraying the slurry from the outlet of the distributing pipe 13 under the high pressure condition; secondly, a swirler 18 is additionally arranged on the distributing pipe 13 near the moving part of the steel tank chain 6, compressed air is injected into the swirler 18 through a compressed air hose, and the compressed air in the swirler 18 enters the distributing pipe 13 in a rotating mode, so that the spraying effect is enhanced; the accelerator pump 28 is arranged in the working face air return way, the accelerator pump 28 pumps the accelerator into the cyclone through the accelerator conveying hose 29, and the accelerator can be fully mixed with the slurry under the action of the compressed air rotating in the cyclone 18.
As shown in fig. 2, 4 and 5, the distributing pipe 13 is made of multiple sections of steel braided pipes, and the distributing pipe 13, the compressed air hose 25 and related control cables are wrapped in the steel tank chain 6. One of the core points of the invention is that a steel tank chain fixing part 19 is fixed on a bottom supporting plate 9 of a first group of filling supports 1 of a working face return airway, and a steel tank chain moving part 17 is connected with a traction arm 14 on an intelligent self-moving trolley 7; a swirler 18 is additionally arranged on the distributing pipe 13 near a moving part 17 of the steel tank chain; a distributing pipe with the length of 2-4 m is reserved at the tail end of the cyclone 18, and the distributing pipe is not fixed any more, so that the outlet of the distributing pipe can move and swing conveniently during filling operation; a distributing pipe outlet fixing plate 21 is arranged near the distributing pipe outlet.
As shown in fig. 3 and 7, a rear tail boom 8 is provided at the rear upper portion of the filling frame 1. One of the core invention points of the invention is that a bottom supporting plate 9 is arranged at the rear lower part of a filling bracket 1, and a front baffle plate 10, a middle baffle plate 11 and a rear baffle plate 12 are arranged on the bottom supporting plate 9; the distance between the front baffle 10 and the middle baffle 11 is not less than the sum of the width of the steel tank chain 6 and the frame moving step distance, and the region is the running region of the steel tank chain 6; the distance between the middle baffle 11 and the rear baffle 12 is not less than the width of the intelligent self-moving trolley 7, a certain safety gap is reserved, and the region is the walking region of the intelligent self-moving trolley 7; the bottom supporting plate 9 is provided with two magnetic stripes 16 in the area between the middle baffle 11 and the rear baffle 12, and is used for the autonomous navigation of the intelligent self-moving trolley 7; the heights of the front baffle 10 and the middle baffle 11 are larger than the bending radius of the steel tank chain 6, and the operation of a related supporting device of the tail beam 8 cannot be influenced; the height of the rear baffle 12 is determined according to the slurry repose angle and the actual mining height; the two sides of the rear baffle plates 12 are provided with bolt holes, and rubber soft plates 27 are fixed between the two adjacent rear baffle plates 12 by using bolts so as to prevent slurry from flowing into a bottom supporting plate 9 of the filling support 1 when the filling support 1 moves, and prevent the normal operation of the intelligent self-moving trolley 7.
As shown in figure 5, the intelligent self-moving trolley 7 is driven by a lead-acid battery, has the functions of rail navigation of a sensor and autonomous obstacle avoidance of an ultrasonic radar, and is equipped with an industrial rocker handheld device to realize artificial navigation under special conditions. One of the core invention points of the invention is that a traction arm 14 and a mechanical arm 15 are fixed on the upper part of the intelligent self-moving trolley 7; the bottom of the traction arm 14 is fixed on the intelligent self-moving trolley 7, and the other end of the traction arm 14 is connected with a steel tank chain moving part 17 through a bolt; the bottom of the mechanical arm 15 is fixed on the intelligent self-moving trolley 7, and a mechanical arm fixing plate 20 is connected with a distributing pipe outlet fixing plate 21 through a bolt.
As shown in fig. 1, 4 and 6, a compressed air hose 25 is connected with the underground compressed air pipeline 23, and an electric gate valve 24 is arranged at the interface; the compressed air hose 25 is fixed on the first group of filling supports 1 of the working face return airway through a straight pipe seat. A compressed air hose 25 is wrapped inside the steel tank chain 6, and the end of the compressed air hose 25 is connected with an external spiral pipe 26 of the cyclone 18.
As shown in fig. 1, 4 and 6, the cyclone 18 is composed of a section of wear-resistant steel pipe and two external spiral pipes 26 wound on the wear-resistant steel pipe; the compressed air hose 25 is connected at its end to the external spiral pipe 26 of the cyclone 18, and the accelerator delivery hose 29 is connected at one end to the accelerator pump 28 and at the other end to the other external spiral pipe 26 of the cyclone 18.
The working principle of the invention is as follows:
firstly, coal gangue, fly ash, cement and water are mixed in proportion to prepare slurry with higher mass concentration, and the slurry is conveyed into a receiving hopper 23 of a filling pump 1. The filling pump 1 can pump slurry into the goaf along the steel braided tube 3, the straight tube seat 4, the 90-degree wear-resistant elbow 5 and the distributing tube 13, and the slurry enters the goaf in a spraying mode under the combined action of constant-pressure output of the filling pump and the swirler 18. The accelerator pump 28 is arranged in the working face air return way, the accelerator pump 28 pumps the accelerator into the cyclone 18 through the accelerator conveying hose 29, and the accelerator can be fully mixed with the slurry under the action of the compressed air rotating in the cyclone 18. Under the combined action of the accelerator, the high-pressure gas and the higher outlet pressure, the slurry can be tightly attached to a filling body of the goaf, can be finally solidified within 10 minutes, and has certain pressure bearing capacity.
The intelligent self-moving trolley 7 has the functions of sensor rail navigation and ultrasonic radar autonomous obstacle avoidance, and is provided with industrial rocker handheld equipment, so that the autonomous reciprocating movement during normal filling operation and the manual navigation function under special conditions are realized; on the other hand, the mechanical arm carried by the intelligent trolley can drive the outlet of the distributing pipe to move up and down and swing circumferentially in a small amplitude, so that dense injection filling of the full section in the goaf behind the working face can be realized, roof contact can be realized in the injection process, and the filling efficiency is greatly improved.
The lower rear part of the filling bracket 1 is provided with a bottom supporting plate 9, and 2 magnetic stripes are arranged in the area between a middle baffle 11 and a rear baffle 12 on the bottom supporting plate 9. When the system normally operates, the intelligent self-moving trolley 7 can autonomously navigate and move between the two magnetic stripes 16 by utilizing a sensor equipped by the intelligent self-moving trolley, and has an ultrasonic radar autonomous obstacle avoidance function; when the system has problems and cannot automatically guide navigation, manual navigation can be realized by using industrial rocker handheld equipment.
The operation mode of the invention is described by taking a 21104 fully mechanized coal mining face of a certain coal mine as an example:
the annual output of the coal mine is 13.0Mt/a, the annual output of a 21104 fully-mechanized coal mining working face is 5.0Mt/a, the design year working day of the mine is 330 days, the mining height of the working face is 2.75m, the total length of the working face is 320m, the moving step distance of a support is 0.8m, a four-six working system is adopted, the number of the coal cutters of the coal mining machine of the working face every day is 18, the production shift time is 6 hours, and the time of each cutter of the working face is 60 minutes; the amount of gangue required to be filled in the mine is 2.0Mt/a every year, and the actual slurry conveying capacity of the designed filling pump is about 360m 3 And h, designing the length of a goaf filling section to be 120m, so that the time consumed by full-section injection filling in the range of 120m is as follows:
120×2.75×0.8/360＝0.74h＝44.4min
when the system normally operates, the moving speed of the intelligent self-moving trolley 7 is 1m/s.
(1) When the coal cutter 24 cuts coal, the direction is from the working face return airway to the working face conveying airway
Firstly, coal gangue, fly ash, cement and water are mixed in proportion to prepare slurry with higher mass concentration, and the slurry is conveyed into a receiving hopper 22 of a filling pump. After the coal mining machine 30 is started, coal mining is continuously carried out, and after the first group of filling supports 1 on the return airway side of the working face are moved, filling space appears behind the supports. At this time, the electric gate valve 24 is opened, and compressed air enters the cyclone 18 through the compressed air hose 25; starting a quick-setting admixture pump 28, and pumping the quick-setting admixture into the cyclone 18 through a quick-setting admixture delivery hose 29; then the filling pump 2 is started, and slurry enters the gob to be filled along the steel braided tube 3, the straight tube seat 4, the 90-degree wear-resistant elbow 5 and the distributing tube 13 in a spraying mode; in the filling process, the mechanical arm 15 drives the distributing pipe 13 to move up and down and swing circumferentially in a small amplitude, so that full mining height filling is performed on the goaf; after the filling space behind the first group of filling supports 1 is filled, the intelligent self-moving trolley 7 moves towards the direction of a working face conveying roadway, and the traction arm 14 on the intelligent self-moving trolley 7 drives the steel tank chain 6 to move the same distance with the intelligent self-moving trolley, so that the next filling space is filled. Along with the continuous operation of the coal mining operation, the coal mining machine 30 continuously moves towards the direction of the working face conveying roadway, the filling operation is continuously carried out in the process, at the moment, the coal mining and the filling operation are carried out in parallel, until the filling sections are completely filled, the intelligent self-moving trolley 7 drives the steel tank chains 6 to return to the first group of filling supports 1 on the return airway side of the working face, and the filling system stops operating.
In the process, the full-section jet filling time of the filling section within the range of 120m is 44.4min, after the filling operation is completed, the time for the intelligent self-moving trolley 7 to return to the first support of the return airway is 2min, and the time for the coal mining machine 30 to run for one cut is more than 46.4min.
(2) When the coal cutter cuts coal from the working face conveying roadway to the working face return airway
When the coal mining machine continuously mines coal and runs into a goaf filling section, although a filling space appears behind the filling support 1, the intelligent self-moving trolley 7 cannot enter the running area between the middle baffle 11 and the rear baffle 12 of the filling support 1 due to the influence of the movement of the filling support 1, so that the filling operation needs to be one step behind the coal mining operation. That is, when the coal cutting direction of the coal mining machine 30 is from the working face haulage roadway to the working face return airway, the filling operation is not performed, and the intelligent self-moving trolley 7 is always positioned behind the first group of filling supports 1 on the working face return airway side. When the coal mining machine 30 cuts coal from the working face return airway to the working face transport airway again, the coal mining and filling are performed in parallel again, and at the moment, a filling space with two steps needs to be filled at one time.
At the moment, the filling system needs to fill the space with two steps at one time, the time is 88.8min, after the filling operation is completed, the intelligent self-moving trolley 7 returns to the first group of filling supports 1 of the return airway, the time is 2min, and the time required for the coal mining machine 30 to run to the position 120m away from the end of the working face again is 99min or more than 90.8min.
(3) Filling amount of gangue
Considering the influence of factors such as roof pressure and the like, the filling height is 2.6m when the filling amount is calculated, and the annual gangue filling amount in the filling operation is as follows:
330×18×0.8×2.6×120＝4492.8m 3 /d
namely, the amount of the waste rock and the fly ash which can be processed is 2.593Mt/a each year, the requirement of filling the waste rock 2.0Mt each year is met, and the normal production capacity of the 21104 working face reaches the design production capacity of 5.0Mt/a.
In conclusion, no matter what coal mining direction, when the system normally runs, the filling operation does not affect the coal mining operation, and the annual output of the mine is not affected.
Claims (4)
1. The underground intelligent injection filling exploitation equipment for the coal mine is characterized by comprising a filling support (1), a filling pump (2), a steel braided pipe (3), a straight pipe seat (4), a 90-degree wear-resistant elbow (5), a distributing pipe (13), a steel tank chain (6), an intelligent self-moving trolley (7), a traction arm (14), a mechanical arm (15), a cyclone (18), a compressed air hose (25), an electric gate valve (24), an accelerator pump (28) and an accelerator conveying hose (29); wherein,
the filling pump (2) and the accelerator pump (28) are arranged in the working face air return roadway, the outlet of the filling pump (2) is connected with the steel braided tube (3), the tail end of the steel braided tube (3) is fixed on the first group of filling supports (1) of the working face air return roadway through the straight tube seat (4), and the straight tube seat (4) is connected with the 90-degree wear-resistant elbow (5) through a flange; the 90-degree wear-resistant elbow (5) is connected with the distributing pipe (13);
the distributing pipe (13), the compressed air hose (25), the accelerator conveying hose (29) and the control cable are all wrapped in the steel tank chain (6); a steel tank chain fixing part (19) is fixed on a bottom supporting plate (9) of a first group of filling supports (1) of a working face air return roadway, and a steel tank chain moving part (17) is connected with a traction arm (14) on an intelligent self-moving trolley (7); a cyclone (18) is additionally arranged on the distributing pipe (13) near a moving part (17) of the steel tank chain; a distributing pipe (13) with the length of 2-4 m is reserved at the tail end of the cyclone (18), and a distributing pipe outlet fixing plate (21) is arranged near the outlet of the distributing pipe (13);
a bottom supporting plate (9) is arranged at the rear lower part of the filling support (1), and a front baffle (10), a middle baffle (11) and a rear baffle (12) are arranged on the bottom supporting plate (9); the bottom supporting plate (9) is also provided with two magnetic stripes (16) in the area between the middle baffle (11) and the rear baffle (12) for the autonomous navigation of the intelligent self-moving trolley (7);
a traction arm (14) and a mechanical arm (15) are fixed on the upper part of the intelligent self-moving trolley (7); the bottom of a traction arm (14) is fixed on the intelligent self-moving trolley (7), and the other end of the traction arm (14) is connected with a steel tank chain moving part (17); the bottom of the mechanical arm (15) is fixed on the intelligent self-moving trolley (7), and a mechanical arm fixing plate (20) is connected with a distributing pipe outlet fixing plate (21);
the compressed air hose (25) is connected with the underground compressed air pipeline (23), and an electric gate valve (24) is arranged at an interface; the compressed air hose (25) is fixed on the first group of filling supports (1) of the working face return airway through a straight pipe seat, and the compressed air hose (25) is wrapped in the steel tank chain (6);
the cyclone (18) consists of a section of wear-resistant steel pipe and two external spiral pipelines (26) wound on the wear-resistant steel pipe; the tail end of the compressed air hose (25) is connected with one external spiral pipeline (26) of the cyclone (18), one end of the accelerator delivery hose (29) is connected with the accelerator pump (28), and the other end of the accelerator delivery hose is connected with the other external spiral pipeline (26) of the cyclone (18);
the straight pipe seat (4) and the 90-degree wear-resistant elbow (5) are both made of double-layer metal wear-resistant pipes;
bolt holes are arranged on two sides of the rear baffle plate (12), and a rubber soft plate (27) is fixed between two adjacent rear baffle plates (12) by bolts.
2. The coal mine underground intelligent jet-filling exploitation device according to claim 1, wherein the distance between the front baffle (10) and the middle baffle (11) is not less than the sum of the width of the steel tank chain (6) and the frame moving step distance, and the area is the running area of the steel tank chain (6); the distance between the middle baffle (11) and the rear baffle (12) is not less than the width of the intelligent self-moving trolley (7), a safety gap is reserved, and the area is a walking area of the intelligent self-moving trolley (7).
3. The coal mine underground intelligent jet-filling mining equipment according to claim 1, characterized in that the heights of the front baffle (10) and the middle baffle (11) are both greater than the bending radius of the steel tank chain (6) and are used for ensuring the operation of the related supporting device of the rear tail beam (8).
4. The coal mine underground intelligent jet-filling mining equipment according to claim 1, characterized in that a filling pump receiving hopper (22) is arranged on the filling pump (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710487390.3A CN107131000B (en) | 2017-06-23 | 2017-06-23 | Intelligent jet filling mining equipment for underground coal mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710487390.3A CN107131000B (en) | 2017-06-23 | 2017-06-23 | Intelligent jet filling mining equipment for underground coal mine |
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| CN107131000A CN107131000A (en) | 2017-09-05 |
| CN107131000B true CN107131000B (en) | 2023-03-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109653791A (en) * | 2019-01-09 | 2019-04-19 | 中国矿业大学 | A kind of underground coal mine intelligence gangue pump packing system |
| CN109653792A (en) * | 2019-02-25 | 2019-04-19 | 内蒙古中科智能矿山科技有限公司 | A kind of construction machinery backfilling coal cutting roadway |
| CN110406951A (en) * | 2019-07-23 | 2019-11-05 | 华电郑州机械设计研究院有限公司 | A kind of method and apparatus controlling filling drag conveyor discharging window using ultrasonic distance measurement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291323A (en) * | 2013-05-24 | 2013-09-11 | 山东鲁科自动化技术有限公司 | Wet-type concrete spray unit |
| WO2015058483A1 (en) * | 2013-10-23 | 2015-04-30 | 中国矿业大学 | Method for separately mining and transporting thick coal seam with gangue, and backfilling goaf with gangue |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291323A (en) * | 2013-05-24 | 2013-09-11 | 山东鲁科自动化技术有限公司 | Wet-type concrete spray unit |
| WO2015058483A1 (en) * | 2013-10-23 | 2015-04-30 | 中国矿业大学 | Method for separately mining and transporting thick coal seam with gangue, and backfilling goaf with gangue |
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