CN113404492B - Soft channel dust fall system and method for fully mechanized coal mining face - Google Patents
Soft channel dust fall system and method for fully mechanized coal mining face Download PDFInfo
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- CN113404492B CN113404492B CN202110828085.2A CN202110828085A CN113404492B CN 113404492 B CN113404492 B CN 113404492B CN 202110828085 A CN202110828085 A CN 202110828085A CN 113404492 B CN113404492 B CN 113404492B
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- 239000003245 coal Substances 0.000 title claims abstract description 304
- 238000000034 method Methods 0.000 title claims abstract description 113
- 239000000428 dust Substances 0.000 title claims abstract description 38
- 238000005065 mining Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 74
- 230000008569 process Effects 0.000 claims abstract description 57
- 210000000078 claw Anatomy 0.000 claims description 20
- 230000004888 barrier function Effects 0.000 claims description 19
- 238000005507 spraying Methods 0.000 claims description 16
- 230000001629 suppression Effects 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 21
- 238000007667 floating Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000007599 discharging Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000725 suspension Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000000243 solution Substances 0.000 description 2
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- 239000002360 explosive Substances 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
-
- 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
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
- E21F13/066—Scraper chain conveyors
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
The invention belongs to the technical field of underground mining of coal mines, in particular to a fully-mechanized coal mining face soft channel dust fall system and method, which are used for solving the problem that coal dust floats greatly when a fully-mechanized top coal mining face carries out a top coal caving process; when the working face carries out the coal cutting process, main air flow passes through the air flow soft channel of the coal cutting process and is used by staff and diluted gas in the air flow soft channel of the coal cutting process; when the working face carries out the top coal caving process, stopping coal cutting operation, and enabling the air quantity to mainly travel through an air flow soft channel of the top coal caving process, so that coal dust generated by top coal caving and coal dust generated by a rear belt conveyor are taken away along the air flow soft channel of the top coal caving process; the method can greatly reduce the coal dust floating in the working area, so that the working environment of operators is improved and the safety degree is improved.
Description
Technical Field
The invention belongs to the technical field of underground mining of coal mines, and particularly relates to a soft channel dust fall system and method for a fully mechanized mining face.
Background
In underground mining of a coal mine, when a mined coal layer is a soft coal layer, the problem of dust fall of a fully-mechanized caving face is a great difficulty affecting production, and particularly the problem is more remarkable on the fully-mechanized caving face of a thick coal layer, and at present, two common methods are as follows: firstly, working face advanced water injection and coal wall temporary water injection, secondly, spraying dust fall in the working face coal cutting and coal discharging processes can be used simultaneously in production practice, but the dust fall effect is not ideal, because: the advanced water injection and the coal wall water injection of the first method can only moisten part of the coal seam cut by the coal cutting machine, the part of the coal seam occupies smaller space, and occupies larger top coal, and the high-pressure water pressure is adopted by a high-position drill hole to carry out the top coal water injection to the top of the coal seam, but the method has higher water injection cost and complex process, and can not be applicable to the soft coal seam because of higher hole sealing difficulty, the working face of the second method can only play a part dust fall role in cutting coal and discharging coal, can play a better effect in the coal cutting process, but has poor effect on explosive coal dust generated in the top coal discharging process, so that the produced coal dust is large in the production of the working face, especially on a middle-position top coal discharging bracket with a rear conveyor, even though the coal discharging port is also provided with a spray dust discharging nozzle, but because the flow rate and flow rate of the coal are large in the top coal discharging port are large, the water sprayed out of the spray nozzle appears to be a small way, and the problem that the back part of the special top coal is not smoothly discharged in the working face is not blocked by the air space when the top coal is in the whole working face is not smoothly carried out, so that the problem of the working face is not seriously diffused in the working face is solved, and the working space is not seriously bad at the present.
In order to solve the problem that coal dust floats greatly when the fully-mechanized top coal caving working face carries out the top coal caving working procedure, a semi-permeable soft air barrier penetrating through the whole working face is arranged on a rear row upright post of a fully-mechanized top coal caving bracket, so that a coal cutting working procedure air flow soft channel at the front part of the bracket and a top coal caving working procedure air flow soft channel at the rear part of the bracket are formed; when the working face carries out the coal cutting process, main air flow passes through the air flow soft channel of the coal cutting process and is used by staff and diluted gas in the air flow soft channel of the coal cutting process; when the working face carries out the top coal caving process, the coal cutting operation is stopped, the air quantity is mainly led to travel through the top coal caving process air flow soft channel, the coal dust generated by the top coal caving and the coal dust generated by the rear conveyor are led away along the top coal caving process air flow soft channel, and the method can greatly reduce the floating coal dust in the working area, so that the working environment of operators is improved, and the safety degree is improved.
Disclosure of Invention
To solve the problems set forth in the background art. The invention provides a soft channel dust fall system and a soft channel dust fall method for a fully mechanized coal mining face, which are used for solving the problems mentioned in the background technology center.
In order to achieve the above purpose, the present invention provides the following technical solutions: a fully-mechanized coal mining face soft channel dust fall system and method comprises the following steps:
the first step: in a section stoping roadway for thick coal seam caving coal exploitation, a section air inlet roadway which is paved with a transfer conveyor and a belt conveyor and also serves as coal transportation is arranged at the lower part, a section air return roadway which is paved with a track and also serves as material transportation is arranged at the upper part, a fully-mechanized caving coal working face is arranged between the section air inlet roadway and the section air return roadway, and a fully-mechanized caving coal bracket is arranged in the fully-mechanized caving coal working face;
and a second step of: the front part of the fully-mechanized top coal mining and caving support is provided with a front scraper conveyor special for cutting coal, the rear part of the fully-mechanized top coal mining and caving support is provided with a rear scraper conveyor special for caving coal, a spraying dust-reducing device is arranged on the coal cutting machine of the fully-mechanized top coal mining and caving working face and near a coal caving opening of the fully-mechanized top coal mining and caving support, and the spraying dust-reducing devices can automatically perform spraying dust reduction when cutting coal and caving coal respectively;
and a third step of: a front cylindrical surface of a rear row of upright posts is tightly attached to the inner end surface of a top beam of a fully-mechanized top coal caving bracket, a tensioning rope and a hanging hook are used for hanging one surface to cover a soft air barrier which covers the upper and lower parts of the space in the fully-mechanized top coal caving bracket and is provided with meshes, the soft air barrier is arranged from a section air inlet gallery to a section return air gallery, the whole fully-mechanized top coal caving working surface is connected, the fully-mechanized top coal caving working surface is divided into a front coal cutting working procedure air flow soft channel and a rear top coal caving working procedure air flow soft channel, and meanwhile, an air inlet at the lower part of the coal cutting procedure air flow soft channel, an air inlet at the lower part of the top coal cutting procedure air flow soft channel of the top coal caving procedure air flow soft channel and an air outlet at the upper part of the top coal caving procedure air flow soft channel are formed;
fourth step: when the fully-mechanized top coal caving face is subjected to a normal coal cutting process, an air inlet at the lower part of a coal cutting process air flow channel of a coal cutting process air flow soft channel, an air outlet at the upper part of the coal cutting process air flow soft channel, an air inlet at the lower part of the top coal caving process air flow soft channel and an air outlet at the upper part of the top coal caving process air flow soft channel are not shielded, and a coal cutting machine is subjected to normal coal cutting and spraying dust falling work and a subsequent forward frame moving process;
fifth step: when the fully-mechanized top coal caving face is about to carry out the top coal caving process, stopping the coal cutting operation of the fully-mechanized top coal caving face, arranging an upper wind shield at an air outlet at the upper part of a coal cutting process air flow soft channel of the coal cutting process air flow soft channel, or arranging a lower wind shield at an air inlet at the lower part of the coal cutting process air flow channel of the coal cutting process air flow soft channel, so as to force main air flow to circulate along the top coal caving process air flow soft channel;
sixth step: when the caving coal working procedure of the fully mechanized caving coal working face is carried out, a spraying dust fall device near a caving coal port is started at the same time, and an operator observes the technological condition of caving coal through meshes on a soft air barrier;
seventh step: after the top coal caving process of the fully-mechanized top coal caving face is finished, the lower wind guard and the upper wind guard are removed, and the next coal cutting and frame moving process can be performed.
Preferably, the soft windbreak is a flame-retardant cord fabric or stainless steel soft window screen with dense meshes, the mesh density is 18-24 meshes, and when the soft windbreak is hung, a stackable rich margin of a frame moving distance is reserved between two adjacent fully-mechanized mining top coal caving supports.
Preferably, the soft windbreak is arranged to be hung in a segmented mode, the length of each segment is 2-6 frames of fully-mechanized top coal caving supports, locking strips are respectively arranged at the left end and the right end of each segment, and the locking strips are magnetic attractive strips or nylon locking strips.
Preferably, the tensioning rope is arranged in a segmented fixing mode when being fixed, namely: the method comprises the steps that adjacent 2-6 fully-mechanized top coal caving supports are arranged into a group of sections, one tensioning rope is arranged on each group of sections, the tensioning rope is an elastic tensioning rope and is made of high-elasticity rubber or synthetic materials, and the allowable stretching amount of the length of each group of sections is larger than the maximum moving offset of the adjacent two fully-mechanized top coal caving supports.
Preferably, the suspension hook is a sliding suspension hook and comprises a hook left handle, a hook right handle, a hook left hook claw and a hook right hook claw, wherein the hook left handle and the hook right hook claw are integrally manufactured through an inner circular ring, the hook right handle and the hook left hook claw are integrally manufactured through an outer circular ring, and the inner circular ring and the outer circular ring are nested together and can slide and rotate around the circle center; a compression spring is arranged between the left handle of the hook and the right handle of the hook; the upper end of the soft wind barrier is clamped between the left hook claw of the hook and the right hook claw of the hook, and the upper end of the soft wind barrier is a wind barrier folding stack.
Preferably, the two ends of the top beam lower end surface of the fully-mechanized top coal caving support, which is tightly attached to the front part of the rear row of upright posts, are provided with fixing hooks, the fixing hooks are provided with rope through holes, and the tensioning ropes penetrate through the rope through holes on the fixing hooks and the inner rings of the hanging hooks to hang the soft windshields on the front part of the rear row of upright posts of the fully-mechanized top coal caving support.
Preferably, the upper wind guard and the lower wind guard are rectangular structures, wind guard frames are arranged on the outer sides of the upper wind guard and the lower wind guard, flame-retardant air-tight cloth-shaped materials are arranged in the middle of the wind guard frames, the wind guard frames are made of air duct cloth or high-strength flame-retardant air-tight cord cloth for underground coal mines, four groups of permanent magnets are inlaid on the outer sides of the peripheral frames, the four groups of permanent magnets are respectively wind guard upper magnets, wind guard lower magnets, wind guard left magnets and wind guard right magnets, and the four groups of permanent magnets can be spliced with each other.
Preferably, the upper end of the fully-mechanized top coal caving support is an upper end support, the lower end of the fully-mechanized top coal caving support is a lower end support, and a plurality of top coal caving supports are arranged between the upper end support and the lower end support.
Compared with the prior art, the invention has the beneficial effects that:
compared with the high-cost investment of water injection and dust fall of high-position drilling, the method has the advantages that the problem can be solved only by one tenth of the cost, the dust fall effect is better, the soft channel method is simple in operation process, low in labor intensity, and capable of performing all process operations by common coal mining workers without occupying special operators, time and labor are saved, special technical workers are needed in the existing high-position drilling water injection and dust fall method, special equipment is needed, and the process operation is complex, time and labor are wasted.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a fully mechanized caving face and upper and lower air drift arrangement in an embodiment of the invention;
FIG. 2 is a schematic diagram of a soft windbreak hanging position of a fully-mechanized caving roof coal bracket in an embodiment;
FIG. 3 is a schematic view of a soft windbreak suspension mode in an embodiment;
FIG. 4 is a schematic view of a suspension hook structure according to an embodiment
Fig. 5 is a front view and a side view of a windshield structure in an embodiment.
In the figure: 1. a section return air gallery; 2. a track; 3. an air outlet at the upper part of the air flow soft channel in the coal cutting process; 4. an upper wind deflector; 5. an air outlet at the upper part of the air flow soft channel in the top coal caving process; 6. an upper end bracket; 7. rear row upright posts; 8. a soft windbreak; 9. a top coal caving procedure wind flow soft channel; 10. a lower end bracket; 11. a coal cutter; 12. fully-mechanized caving coal working face; 13. fully-mechanized top coal caving bracket; 14. a coal cutting procedure wind flow soft channel; 15. a front scraper conveyor; 16. a rear scraper conveyor; 17. an air inlet at the lower part of the air flow soft channel in the top coal caving process; 18. a lower wind deflector; 19. an air inlet at the lower part of the air flow channel in the coal cutting process; 20. a reversed loader; 21. a belt conveyor; 22. a section air inlet gallery; 23. a coal discharging port; 24. a hanging hook; 25. a support top beam; 26. a fixed hook; 27. a rope hole; 28. tensioning the rope; 29. a locking strip; 30. a left handle of the hook; 31. a right handle is hooked; 32. a compression spring; 33. an outer ring; 34. an inner ring; 35. a left hook claw of the hook; 36. a right hook claw of the hook; 37. a windbreak folded stack; 38. a wind deflector frame; 39. a wind shield upper magnet; 40. an impermeable cord fabric; 41. a magnet on the right side of the wind shield; 42. a wind shield lower magnet; 43. a magnet on the left side of the wind shield.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-5, the present invention provides the following technical solutions: a fully-mechanized coal mining face soft channel dust fall system and method comprises the following steps:
the first step: in a section stoping roadway for thick coal seam caving coal exploitation, a section air inlet roadway 22 paved with a reversed loader 20 and a belt conveyor 21 and used for conveying coal is arranged at the lower part, a section air return roadway 1 paved with a track 2 and used for conveying material is arranged at the upper part, a fully-mechanized caving coal working surface 12 is arranged between the section air inlet roadway 22 and the section air return roadway 1, and a fully-mechanized caving coal bracket 13 is arranged in the fully-mechanized caving coal working surface;
and a second step of: a front scraper conveyor 15 special for cutting coal is arranged at the front part of the fully-mechanized top coal caving bracket 13, a rear scraper conveyor 16 special for caving top coal is arranged at the rear part of the fully-mechanized top coal caving bracket 13, spraying dust suppression devices are arranged on the coal cutting machine 11 of the fully-mechanized top coal caving working face 12 and near a coal caving opening 23 of the fully-mechanized top coal caving bracket 13, and the spraying dust suppression devices can automatically perform spraying dust suppression during coal cutting and top coal caving respectively;
and a third step of: a front cylindrical surface of a rear row of upright posts 7 is tightly attached to the inner end surface of a top beam of a fully-mechanized top coal caving bracket 13, a soft air barrier 8 with meshes is hung on one surface of the top beam, which covers the upper and lower space in the fully-mechanized top coal caving bracket 13 by a tension rope 28 and a hanging hook 24, the soft air barrier 8 starts from a section air inlet gallery 22 to a section return air gallery 1, the whole fully-mechanized top coal caving working surface 12 is coherent, the fully-mechanized top coal caving working surface 12 is divided into a front coal cutting process air flow soft channel 14 and a rear top coal caving process air flow soft channel 9, and meanwhile, a lower air inlet 19 of the coal cutting process air flow soft channel 14, a lower air inlet 17 of the top coal caving process air flow soft channel 9 and an upper air outlet 5 of the top coal caving process air flow soft channel are formed;
fourth step: when the fully-mechanized top coal caving face 12 carries out a normal coal cutting process, the coal cutting process air flow channel lower air inlet 19 and the coal cutting process air flow channel upper air outlet 3 of the coal cutting process air flow soft channel 14, the top coal caving process air flow soft channel 9 and the top coal caving process air flow soft channel upper air outlet 5 are not shielded, and the coal cutting machine 11 carries out normal coal cutting and spraying dust falling work and the following forward frame moving process;
fifth step: when the fully-mechanized top coal caving face 12 is about to carry out the top coal caving process, stopping the coal cutting operation of the fully-mechanized top coal caving face 12, arranging an upper wind shield 4 at an air outlet 3 at the upper part of a coal cutting process air flow soft channel 14, or arranging a lower wind shield 18 at an air inlet 19 at the lower part of the coal cutting process air flow channel of the coal cutting process air flow soft channel 14, so as to force main air flow to circulate along the top coal caving process air flow soft channel 9;
sixth step: when the caving coal working procedure of the fully mechanized caving coal working face 12 is carried out, a spraying dust fall device near a caving coal port 23 is simultaneously opened, and an operator observes the technological condition of caving coal through meshes on a soft air barrier 8;
seventh step: after the top coal caving process of the fully mechanized top coal caving face 12 is finished, the lower wind guard 18 and the upper wind guard 4 are removed, and the next coal cutting and frame moving process can be performed.
Specifically, the soft air barriers 8 are flame-retardant cord fabric or stainless steel soft window screening with dense meshes, the mesh density is 18-24 meshes, and when the soft air barriers 8 are hung, a stackable rich margin of a frame moving distance is reserved between two adjacent fully-mechanized mining top coal caving supports 13.
Specifically, the soft windbreak 8 is arranged to be hung in a segmented mode, the length of each segment is 2-6 frames of fully-mechanized top coal caving supports 13, locking strips 29 are respectively arranged at the left end and the right end of each segment, and the locking strips 29 are magnetic absorbing strips or nylon locking strips.
Specifically, the tightening rope 28 is fixed in a segment fixing manner, that is: the adjacent 2-6 fully-mechanized caving coal supports 13 are arranged into a group of sections, one tensioning rope 28 is arranged in the group of sections, the tensioning rope 28 is an elastic tensioning rope 28 and is made of high-elasticity rubber or synthetic materials, and the allowable stretching amount of the length of each group of sections is larger than the maximum moving offset of the adjacent two fully-mechanized caving coal supports 13.
Specifically, the suspension hook 24 is a sliding suspension hook, and includes a hook left handle 30, a hook right handle 31, a hook left hook claw 35 and a hook right hook claw 36, where the hook left handle 30 and the hook right hook claw 36 are made into a whole through an inner ring 34, the hook right handle 31 and the hook left hook claw 35 are made into a whole through an outer ring 33, and the inner ring 34 and the outer ring 33 are nested together and can slide and rotate around the center of a circle; a compression spring 32 is arranged between the left hook handle 30 and the right hook handle 31; the upper end of the soft windbreak 8 is clamped between the left hook claw 35 and the right hook claw 36 of the hook, and the upper end of the soft windbreak 8 is a windbreak folding stack 37.
Specifically, the two ends of the top beam lower end surface of the fully-mechanized top coal caving support 13, which is tightly attached to the front part of the rear row upright post 7, are provided with fixing hooks 26, the fixing hooks 26 are provided with rope through holes 27, and the tensioning ropes 28 penetrate through the rope through holes 27 on the fixing hooks 26 and the inner rings 34 of the hanging hooks 24 to hang the soft windshields 8 on the front part of the rear row upright post 7 of the fully-mechanized top coal caving support 13.
Specifically, the upper wind guard 4 and the lower wind guard 18 are rectangular structures, a wind guard frame 38 is disposed outside the upper wind guard 4 and the lower wind guard 18, a flame-retardant air-impermeable cloth-like material is mounted in the middle of the wind guard frame 38, the flame-retardant air-impermeable cloth-like material is a wind tube cloth or a high-strength flame-retardant air-impermeable curtain cloth 40 for underground coal mines, four groups of permanent magnets are inlaid outside the peripheral frame, and the four groups of permanent magnets are respectively a wind guard upper magnet 39, a wind guard lower magnet 42, a wind guard left magnet 43 and a wind guard right magnet 41, and the four groups of permanent magnets can be mutually spliced.
Specifically, the upper end of the fully-mechanized top coal caving support 13 is an upper end support 6, the lower end of the fully-mechanized top coal caving support 13 is a lower end support 10, and a plurality of top coal caving supports are arranged between the upper end support 6 and the lower end support 13.
In the application of the embodiment, the top coal caving process can be carried out from the upper part of a working face to the lower part of the working face one by one, before the top coal caving process is carried out on the working face, an upper wind shield 4 is placed at an air outlet 3 at the upper part of a soft air channel in the coal cutting process, the main air flow is forced to be discharged from an air outlet 5 at the upper part of the soft air channel in the top coal caving process, because the soft air barrier 8 is an integral fine mesh soft air barrier, when the top coal is blown by an upper end support 6, operators can observe the concrete condition of top coal caving by the upper end support 6 through meshes in the soft air channel 14 in the coal cutting process, when the top coal is blown off by the fine meshes on the upper end support 6, namely coal dust generated by falling by the top coal is blocked by the floating meshes in a very short time after the top coal caving process, and because of the flowing upward characteristic of the air flow, the main air flow is little, and most of the coal dust is carried to a section 1 in the soft air channel 9 along with the top coal caving process, and the upper air flow in the soft air channel is blocked by the upper end support 6, and the condition of the soft air barrier is not blocked by the upper end support 8 and can observe the condition of the top coal caving by the upper end support 8; and the like, until the top coal caving process of the lower end support 10 at the lowest part of the working face is finished, when the first cycle process of the coal face is finished and the second cycle of top coal caving process is started, all meshes are full of coal dust, an operator only needs to beat a soft windbreak 8 mesh on an adjacent support at the lower part of the top coal caving support to drop the dust adhered to the soft windbreak 8 mesh, the coal caving condition of the top coal caving support can be observed, and when the coal dust with high viscosity is encountered, the special small low-pressure spray gun can be adopted to spray an observation window on the soft windbreak 8 mesh when the coal dust is beaten and is not easy to drop.
When the working face carries out the top coal caving process from the lower part to the upper part, firstly, an upper wind shield 4 and a lower wind shield 18 are simultaneously placed at an upper air outlet 3 of a soft coal caving process wind flow channel and a lower air inlet 19 of the soft coal caving process wind flow channel, the main wind flow is forced to pass through the soft coal caving process wind flow channel 9, a small amount of wind flow supplies coal to the use of the soft coal caving process wind flow channel 14, when the end bracket 10 under the working face is used for caving coal, part of coal dust floats into the soft coal caving process wind flow channel 14, the air inlet 19 of the lower air inlet of the soft coal caving process wind flow channel and the air outlet 3 of the upper air outlet of the soft coal caving process wind flow channel can be regulated, so that floating coal dust in the soft coal caving process wind flow channel 14 can be quickly dissipated, after the top coal caving process of a plurality of top coal caving frames of the soft coal caving frames of the lower part of the working face is completed, the fine grid of all the soft coal barriers 8 is gradually blocked, and the coal dust generated by the operation of the scraper blade and the coal dust generated by the operation of the back part conveyor 16 of the working face is enabled to be mostly carried along the soft coal caving frames of the soft coal caving frames 9 to be carried out, and the soft coal caving frames are sprayed on the soft coal caving frames of the top coal caving frames which need to be observed when the top coal caving frames to be sprayed on the soft coal caving frames, and the coal caving frames are required to be observed, and the coal caving frames are sprayed on the top coal caving frames, and the coal caving frames are required to be observed, and the coal caving frames are observed, and the lower and the coal workers can be observed.
In the process of the top coal caving procedure, the air quantity of the lower air inlet or the upper air outlet is adjusted by the lower wind shield 18 or the upper wind shield 4 at any time according to the floating condition of coal dust in the air flow soft channel 14 of the coal cutting procedure, so as to achieve the effect of minimum floating coal dust in the air flow soft channel 14 of the coal cutting procedure.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The application method of the soft channel dust fall system of the fully mechanized coal mining face is characterized by comprising the following steps of: the method comprises the following production process steps:
the first step: in a section stoping roadway for thick coal seam caving coal exploitation, a section air inlet roadway (22) paved with a transfer conveyor (20) and a belt conveyor (21) and used for conveying coal is arranged at the lower part, a section air return roadway (1) paved with a track (2) and used for conveying materials is arranged at the upper part, a fully-mechanized caving coal working surface (12) is arranged between the section air inlet roadway (22) and the section air return roadway (1), and a fully-mechanized caving roof coal bracket (13) is arranged in the fully-mechanized caving coal working surface;
and a second step of: a front scraper conveyor (15) special for cutting coal is arranged at the front part of the fully-mechanized top coal caving bracket (13), a rear scraper conveyor (16) special for caving top coal is arranged at the rear part of the fully-mechanized top coal caving bracket (13), spraying dust suppression devices are arranged on the coal cutting machine (11) of the fully-mechanized top coal caving working face (12) and near a coal caving opening (23) of the fully-mechanized top coal caving bracket (13), and the spraying dust suppression devices can automatically perform spraying dust suppression during coal cutting and top coal caving respectively;
and a third step of: a front cylindrical surface of a rear row of upright posts (7) is tightly attached to the inner end surface of a top beam of a fully-mechanized caving coal support (13), a tensioning rope (28) and a hanging hook (24) are used for hanging one surface to cover a soft air barrier (8) with meshes, the soft air barrier (8) is arranged from a section air inlet gallery (22) to a section air return gallery (1), the whole fully-mechanized caving top coal working surface (12) is connected, the fully-mechanized caving top coal working surface (12) is divided into a front coal cutting working procedure air flow soft channel (14) and a rear top coal cutting working procedure air flow soft channel (9), and meanwhile, a coal cutting working procedure air flow soft channel lower air inlet (19) and a coal cutting procedure air flow soft channel upper air outlet (3), a top coal cutting procedure air flow soft channel lower air inlet (17) and a top coal cutting procedure air flow soft channel upper air outlet (5) of the top coal cutting procedure air flow soft channel (9) are formed;
fourth step: when the fully-mechanized top coal caving face (12) carries out a normal coal cutting process, an air inlet (19) at the lower part of a coal cutting process air flow channel of a coal cutting process air flow soft channel (14) and an air outlet (3) at the upper part of the coal cutting process air flow soft channel, an air inlet (17) at the lower part of the top coal caving process air flow soft channel and an air outlet (5) at the upper part of the top coal caving process air flow soft channel are not shielded, and a coal cutting machine (11) carries out normal coal cutting and spraying dust falling work and a subsequent forward frame moving process;
fifth step: when the fully-mechanized top coal caving face (12) is about to carry out a top coal caving process, stopping coal cutting operation of the fully-mechanized top coal caving face (12), arranging an upper wind shield (4) at an air outlet (3) at the upper part of a coal cutting process air flow soft channel (14), or arranging a lower wind shield (18) at an air inlet (19) at the lower part of the coal cutting process air flow soft channel (14) at the same time, and forcing air flow to circulate along the top coal caving process air flow soft channel (9);
sixth step: when the top coal caving process of the fully-mechanized top coal caving face (12) is carried out, a spraying dust fall device near a coal caving opening (23) is started at the same time, and an operator observes the technological condition of top coal caving through meshes on a soft air barrier (8);
seventh step: after the top coal caving process of the fully-mechanized top coal caving face (12) is finished, the lower wind guard (18) and the upper wind guard (4) are removed, and the next coal cutting and frame moving process is carried out.
2. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the soft windbreak (8) is a flame-retardant cord fabric or stainless steel soft window screen with dense meshes, the density of the meshes is 18-24 meshes, and when the soft windbreak (8) is hung, a stackable rich margin of a frame moving distance is reserved between two adjacent fully-mechanized mining top coal caving supports (13).
3. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the soft windbreak (8) is arranged to be hung in a segmented mode, the length of each segment is 2-6 frames of fully-mechanized top coal caving supports (13), locking strips (29) are respectively arranged at the left end and the right end of each segment, and the locking strips (29) are magnetic attraction strips or nylon locking strips.
4. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the tensioning rope (28) is arranged in a sectionally fixed mode when being fixed, namely: the adjacent 2-6 fully-mechanized top coal mining and caving supports (13) are arranged into a group of sections, one tensioning rope (28) is arranged on each group of sections, the tensioning rope (28) is an elastic tensioning rope (28) and is made of high-elasticity rubber or synthetic materials, and the allowable stretching amount of the length of each group of sections is larger than the maximum moving offset of the adjacent two fully-mechanized top coal mining and caving supports (13).
5. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the hanging hook (24) is a sliding hanging hook and comprises a left hook handle (30), a right hook handle (31), a left hook claw (35) and a right hook claw (36), wherein the left hook handle (30) and the right hook claw (36) are integrally manufactured through an inner circular ring (34), the right hook handle (31) and the left hook claw (35) are integrally manufactured through an outer circular ring (33), and the inner circular ring (34) and the outer circular ring (33) are nested together and can slide and rotate around the circle center; a compression spring (32) is arranged between the left hook handle (30) and the right hook handle (31); the upper end of the soft windbreak (8) is clamped between the left hook claw (35) and the right hook claw (36), and the upper end of the soft windbreak (8) is a windbreak folding stack (37).
6. The method for using the soft channel dust suppression system for the fully-mechanized coal mining face according to claim 5, wherein the method comprises the following steps: the utility model discloses a fully-mechanized top coal caving support, including back row stand (7) and fixed hook (26) are installed at the both ends department of the back timber lower extreme face of fully-mechanized top coal caving support (13) hugging closely, lead to rope hole (27) have been seted up on fixed hook (26), taut rope (28) pass through on fixed hook (26) lead to rope hole (27) and hang interior ring (34) of hook (24), hang soft windbreak (8) in the front portion of fully-mechanized top coal caving support (13) back row stand (7).
7. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the wind shield comprises an upper wind shield (4) and a lower wind shield (18), wherein the upper wind shield (4) and the lower wind shield (18) are of rectangular structures, a wind shield frame (38) is arranged on the outer sides of the upper wind shield (4) and the lower wind shield (18), a flame-retardant air-tight cloth-shaped material is arranged in the middle of the wind shield frame (38), four groups of permanent magnet magnets are embedded outside the peripheral frame, namely wind shield upper magnets (39), wind shield lower magnets (42), wind shield left magnets (43) and wind shield right magnets (41), and the four groups of permanent magnet magnets can be mutually spliced.
8. The method for using the soft channel dust suppression system of the fully-mechanized coal mining face according to claim 1, wherein the method comprises the following steps: the upper end of the fully-mechanized top coal caving support (13) is an upper end support (6), the lower end of the fully-mechanized top coal caving support (13) is a lower end support (10), and a plurality of top coal caving supports are arranged between the upper end support (6) and the lower end support (13).
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