CN113389583A - Bottom-cleaning-free self-moving type roof protecting system of air return roadway of fully-mechanized mining working surface of coal mine thin seam - Google Patents
Bottom-cleaning-free self-moving type roof protecting system of air return roadway of fully-mechanized mining working surface of coal mine thin seam Download PDFInfo
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- CN113389583A CN113389583A CN202110735466.6A CN202110735466A CN113389583A CN 113389583 A CN113389583 A CN 113389583A CN 202110735466 A CN202110735466 A CN 202110735466A CN 113389583 A CN113389583 A CN 113389583A
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- cleaning
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- supporting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
- E21D23/26—Hydraulic or pneumatic control
Abstract
The invention provides a bottom-cleaning-free self-moving type roof protecting system of a return airway of a fully-mechanized mining working surface of a coal mine thin seam, which comprises a conveyor tail supporting cushion frame part, a front roadway roof supporting part and a rear roadway supporting part; the conveyor tail supporting cushion frame part comprises a bottom plate, at least two telescopic jacks, two guide plates, a supporting platform and a hydraulic system; the front roadway roof supporting part comprises a front hydraulic support, a front beam and a rear frame are respectively arranged at the front and the rear of a top beam of the front hydraulic support and matched with the rear frame for roof supporting, the front hydraulic support is connected with the front end of a bottom plate of the cushion frame through a first pushing jack and a first connecting head, and a bottom cleaning mechanism is arranged at the front end of a base of the hydraulic support; the rear roadway support part comprises a shield type support, and the front part of a base of the shield type support is connected with the rear end of a bottom plate of the cushion frame through a second pushing jack and a second connector. The system has the advantages of large height adjusting range, self-moving capability and obstacle removing capability and strong adaptability.
Description
Technical Field
The invention relates to the field of coal mine equipment, in particular to a bottom-cleaning-free self-moving type roof protecting system of a fully mechanized mining working face return airway of a coal mine thin seam.
Background
At present, the cutting holes of the fully mechanized mining working face of the domestic thin coal seam are generally arranged according to the thickness of the coal seam, the height of two crossheading is higher, the bottom plate of the crossheading is generally lower than the bottom plate of the working face, and a step is arranged between the bottom plate of the crossheading and the bottom plate of the working face, so that the head and the tail of a scraper conveyor are suspended in the crossheading, and a cushion frame is required to be respectively arranged below the head and the tail of the conveyor in order to ensure the safety and the reliability of the conveyor.
Due to the problems of fluctuation of the trend of the crossroads, mine pressure display, change of mining height of a working face and the like, the height of a step between the working face and the two crossroads is constantly changed, so that the height of cushion frames arranged below a machine head and a machine tail of a conveyor is required to be adjustable to adapt to the constantly changed height of the step.
The more of bedding frame part prior art uses is multilayer pull formula bedding frame, through setting up multilayer bedding frame, adjusts the height of bedding frame through the number of piles that increases or reduces the bedding frame when the working face with in the same direction as the step height grow between the groove or diminish, realizes the effective support of conveyer aircraft nose, tail. Because the cushion frame is heavy and the underground operation space is narrow, the method has the problems of discontinuous height adjustment, low replacement efficiency, high labor intensity, potential safety hazard and the like.
In addition, patent 201810118673.5 (conveyor two-end pad rack and mobile device) discloses a conveyor two-end pad rack and mobile device thereof, which realizes the up-and-down movement of a lifting platform by additionally arranging a lifting oil cylinder to solve the problems of discontinuous height adjustment, low replacement efficiency, high labor intensity, potential safety hazard and the like of the pad rack.
Still like patent 201720885691.7 (scrape trigger flexible bed hedgehopping for bottom cutting) disclose a scrape trigger flexible bed hedgehopping for bottom cutting, outer jar support cover on the inner cylinder base, there is the pneumatic cylinder respectively outer jar support both sides, and the pneumatic cylinder is fixed with outer jar support through two at least clamp plates, adjusts for the roof locating pin B fix on outer jar support top and can angle regulation. Under the condition that the height of a coal face changes, the whole scraper conveyor can stably run on the face through adjustment of the telescopic cushion frame, so that the bending deformation of the scraper conveyor is reduced to the maximum extent, the coal mining difficulty is effectively reduced, and the service life of the scraper conveyor is prolonged. However, the lifting oil cylinder is arranged below the equipment, so that the lowest height is high, the adjustable height range is small, the length of the working surface is changed, or the cushion frame is easy to interfere with the step between the working surface and the smooth groove when the conveyer moves up and down on the working surface.
In addition, the top of the conveyor tail and the adjustable cushion frame needs to be supported in the underground use process, and the top support has a blind area due to the fact that the parts such as the motor, the speed reducer and the cushion frame are arranged at the position. At present, single support columns are adopted for supporting underground parts, and the problems of small supporting force, low efficiency, high labor intensity, low safety and the like exist.
Because the tail part of the conveyer and the adjustable cushion frame are heavy, the problem of difficult movement frequently occurs in the underground use process, generally, a winch is adopted for traction, and the problems of complex operation, low efficiency, poor safety and the like exist.
When a roadway bottom plate fluctuates or the bottom of a drum is serious, the winch can be pulled immovably, bottom cleaning operation is generally required manually, cleaning is more difficult when a rock roadway is encountered, and the problems of low efficiency, high labor intensity and the like exist.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a bottom-cleaning-free self-moving type roof protecting system for a return airway of a fully mechanized mining working surface of a coal mine thin seam, which has a large height adjusting range, self-moving capability and obstacle clearing capability and high adaptability.
In order to achieve the purpose, the invention adopts the technical scheme that: a bottom-cleaning-free self-moving type roof protecting system of a return airway of a fully mechanized mining face of a coal mine thin seam comprises a conveyor tail supporting cushion frame part, a front roadway roof supporting part and a rear roadway supporting part;
the conveyor tail supporting cushion frame part comprises a bottom plate, at least two telescopic jacks, two guide plates, a supporting platform and a hydraulic system; the two guide plates are vertically fixed on the bottom plate and arranged in parallel, and vertical guide holes are respectively formed in the two guide plates; the supporting platform is a groove-shaped platform, two vertical edges of the groove-shaped platform are parallel and are tightly attached to the inner side surface of the guide plate, the bottom surface of the groove-shaped platform is a supporting surface, guide blocks are arranged on the outer sides of the two vertical edges of the groove-shaped platform corresponding to the guide holes, and connecting lugs are arranged on the guide blocks; the at least two telescopic jacks are respectively arranged on the outer sides of the two guide plates, the bottom ends of the telescopic jacks are fixed on the bottom plate, and the top ends of the telescopic jacks are hinged with the connecting lugs; the hydraulic system is connected with the telescopic jack and provides power for the telescopic jack; the height difference between the connecting lug and the supporting surface is set according to the height of the guide plate and the telescopic stroke of the telescopic jack, so that when the telescopic jack is completely retracted, the supporting surface reaches or approaches the bottom plate;
the front roadway roof supporting part comprises a front hydraulic support, a front beam and a rear frame are respectively arranged at the front and the rear of a top beam of the front hydraulic support and matched with each other to support a roof, a first pushing jack and a first connector are arranged at the rear part of a base of the front hydraulic support, a first hinge lug is arranged at the front end of a bottom plate of a conveyor tail supporting cushion frame, the first pushing jack is connected with the first hinge lug through the first connector, a bottom cleaning mechanism is arranged at the front end of the base of the hydraulic support, the bottom cleaning mechanism comprises a bottom cleaning frame, a bottom cleaning jack and a telescopic body, the telescopic body is arranged at the movable end of the bottom cleaning jack, and an inclined bottom cleaning toothed rail is arranged at the front part of the telescopic body;
the rear roadway support part comprises a shield type support, the front end of a support top beam of the shield type support extends to the rear frame of a front hydraulic support top beam, the front part of a base of the shield type support is provided with a second pushing jack and a second connector, the rear end of a bottom plate of a conveyor tail support cushion frame is provided with a second hinge lug, and the second pushing jack is connected with the second hinge lug through the second connector.
Basically, a bidirectional lock and a safety valve are respectively arranged on an upper cavity hydraulic pipeline and a lower cavity hydraulic pipeline of the hydraulic system connected with the telescopic hydraulic cylinder.
And a liquid inlet of the hydraulic system is provided with a stop valve and an automatic backwashing filter.
Basically, the liquid inlet of the hydraulic system is provided with an electric control speed regulating valve.
Basically, telescopic jack disposes four and two liang in groups and sets up in the outside of two deflectors, the corresponding guiding hole that sets up two parallels on the deflector, two vertical edge outsides of flute profile platform are corresponding sets up two guide blocks, all disposes a engaging lug on every guide block, and the top of every telescopic jack articulates a engaging lug.
On the basis, a slideway is arranged on the bottom cleaning frame corresponding to the telescopic body, and the telescopic body is slidably arranged in the slideway.
The rear end of the rear frame of the top beam of the front hydraulic support is connected with the front end of the top beam of the shield type support.
Basically, the front end of the telescopic body is provided with a conical surface with a sharp angle, and the conical surface is uniformly provided with a plurality of bottom cleaning toothed rails.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly, the telescopic oil cylinders are arranged at the front part and the rear part of the head and the tail of the conveyor, and the groove-shaped supporting platform supports the head and the tail, so that the height of the part of the cushion frame supporting the head and the tail is greatly reduced, the lowest height is only the thickness of two layers of plates, namely a bottom plate and a supporting surface, the actual adaptive step difference range can reach 80-2000mm, the height adjusting range is greatly improved, and the invention has strong adaptability.
Further, the direct overlap joint of conveyer aircraft nose tail is on bed hedgehopping supporting platform, be non-contact with supporting platform and be connected, can follow the working face between the two and cut the eye direction and slide, in the advancing in-process when the working face length changes or the conveyer appears scurrying the gliding in the working face, the conveyer aircraft nose tail can slide on bed hedgehopping supporting platform, has effectively avoided bed hedgehopping and working face and the problem of step production interference between the groove, has guaranteed the stability of system.
Furthermore, a front hydraulic support is arranged in front of the cushion frame, a shield type support is arranged at the rear of the cushion frame, support top beams of the front hydraulic support and the shield type support are used for supporting a roadway top plate, the cushion frame is completely shielded, and gangue leakage at the top is prevented.
Furthermore, the front roadway roof supporting part and the rear roadway roof supporting part are connected with the bottom plate of the cushion frame through pushing jacks, and the stepping type self-moving of the system can be realized through the alternative supporting and matching of the front roadway roof supporting part and the rear roadway roof supporting part.
Furthermore, in the advancing process, when the bottom of a tunnel bulges or fluctuates, the telescopic body is driven to advance or retreat along the slide way in the bottom cleaning frame by controlling the extension and retraction of the bottom cleaning jack, so that the bottom cleaning treatment of the tunnel is realized, and the problems of low manual bottom cleaning efficiency and high labor intensity are solved.
The bottom-cleaning-free self-moving height-adjusting and top-protecting system successfully realizes effective support of the tail suspension section of the thin seam fully-mechanized coal mining face conveyor, has the advantages of large height adjusting range, simple structure, simplicity and convenience in operation of workers, high reliability, strong adaptability and the like, has the functions of bottom cleaning of a roadway, front-back stepping self-moving and the like, realizes the unification of support, bottom cleaning and self-moving, greatly simplifies underground labor, and is favorable for safe, high-yield and high-efficiency production of a coal mine working face.
Drawings
Fig. 1 is a schematic overall structure diagram of a bottom-cleaning-free self-moving roof protection system of a return airway of a fully mechanized mining face of a coal mine thin seam in the invention.
Fig. 2 is a position diagram of the bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine in the airway.
Fig. 3 is a top view of the bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized working face of the coal mine in the tunnel.
Fig. 4 is a schematic structural view of a conveyor tail support pedestal part in the invention.
Fig. 5 is a schematic structural view of a partially contracted state of a conveyor tail support pedestal according to the present invention.
Fig. 6 is a schematic structural view of a partially extended state of a conveyor tail support bed according to the present invention.
Fig. 7 is a side view of a conveyor tail support skid portion of the present invention.
Fig. 8 is a schematic diagram of a hydraulic system of a tail support skid portion of a conveyor in accordance with the present invention.
In the figure: 1. a base plate; 2. a telescopic jack; 3. a guide plate; 4. a support platform; 5. a guide hole; 4-1, vertical edge; 4-2, a support surface; 4-3, a guide block; 4-4, connecting the lug; (ii) a 5. A conveyor; 6. a step; 11. a conveyor tail support cushion frame part; 21. a front roadway roof support section; 22. a front beam; 23. a rear frame; 24. a first pushing jack; 25. a first connector; 26. a first hinge ear; 27. cleaning the bottom frame; 28. cleaning a jack; 29. a telescopic body; 30. clearing the bottom rack; 31. a rear roadway support section; 32. a shield-type support; 33. a support top beam; 34. a second pushing jack; 35. a second connector; 36. a second hinge ear.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1-8, a bottom-cleaning-free self-moving roof protection system for a return airway of a fully mechanized mining face of a thin coal seam of a coal mine comprises a conveyor tail supporting cushion frame part 11, a front roadway roof supporting part 21 and a rear roadway supporting part 31.
The conveyor tail supporting cushion frame part comprises a bottom plate 1, four telescopic jacks 2, two guide plates 3, a supporting platform 4 and a hydraulic system, wherein the two guide plates 3 are vertically fixed on the bottom plate 1, the two guide plates 3 are arranged in parallel, and vertical guide holes 5 are formed in the two guide plates 3 respectively.
The supporting platform 4 is a groove-shaped platform, two vertical edges 4-1 of the groove-shaped platform are parallel and closely attached to the inner side face of the guide plate 3, the bottom face of the groove-shaped platform is a supporting face 4-2, guide blocks 4-3 are arranged on the outer sides of the two vertical edges 4-1 of the groove-shaped platform corresponding to the guide holes 5, connecting lugs 4-4 are arranged on the guide blocks 4-3, in order to improve the structural strength of the supporting platform, the groove-shaped platform is of an integrally formed structure, and the height difference between the connecting lugs 4-4 and the supporting face 4-2 is set according to the height of the guide plate 3 and the telescopic stroke of the telescopic jack 2, so that when the telescopic jack 2 is completely retracted, the supporting face 4-2 reaches or approaches to the bottom plate 1.
The four telescopic jacks are arranged on the outer sides of the two guide plates 3 in a pairwise mode, the bottom ends of the telescopic jacks 2 are fixed to the base plate 1, the top ends of the telescopic jacks 2 are hinged to the connecting lugs 4-4, and in order to improve the overall stability of the cushion frame, the width of the base plate 1 is more than 1.5 times of the distance between the two guide blocks 3.
The hydraulic system is connected with the telescopic jack 2 and provides power for the telescopic jack 2, a bidirectional lock and a safety valve are respectively arranged on an upper cavity hydraulic pipeline and a lower cavity hydraulic pipeline of the hydraulic system which are connected with the telescopic hydraulic cylinder, a stop valve and an automatic backwashing filter are arranged at a liquid inlet of the hydraulic system, and an electric control speed regulating valve is arranged at a liquid inlet of the hydraulic system.
In the fully mechanized mining face propulsion process, when the roadway fluctuates or the working face mining height changes, the step difference between the working face bottom plate and the roadway bottom plate changes correspondingly, and at the moment, the telescopic jack is controlled to stretch to drive the supporting platform 4 to move up and down, so that the tail of the conveyor is effectively supported, and the conveyor is prevented from being damaged.
The front roadway roof supporting part 21 comprises a front hydraulic support, a front beam 22 and a rear frame 23 are respectively arranged at the front and the rear of a top beam of the front hydraulic support and matched with each other for roof supporting, a first pushing jack 24 and a first connecting head 25 are arranged at the rear of a base of the front hydraulic support, a first hinge lug 26 is arranged at the front end of a bottom plate of a conveyor tail supporting cushion frame, the first pushing jack 24 is connected with the first hinge lug 26 through the first connecting head 25, a bottom cleaning mechanism is arranged at the front end of the base of the hydraulic support, the bottom cleaning mechanism comprises a bottom cleaning frame 27, a bottom cleaning jack 28 and a telescopic body 29, the telescopic body is arranged at the movable end of the bottom cleaning jack, an inclined bottom cleaning rack 30 is arranged at the front part of the telescopic body, a slide way is arranged on the bottom cleaning frame 27 corresponding to the telescopic body 29, and the telescopic body 29 is slidably arranged in the slide way, the front end of the telescopic body is provided with a taper surface with a sharp angle, and a plurality of bottom cleaning toothed rails 30 are uniformly arranged on the taper surface.
When the tunnel has a bulge or undulation, in order to prevent the front hydraulic support from passing through difficultly, the telescopic body can be driven to advance or retreat along the slide way in the bottom cleaning frame by controlling the telescopic jack to stretch, so that the bottom cleaning treatment of the tunnel is realized.
Rear portion roadway support part 31 is including shielding formula support 32, the support back timber 33 front end of shielding formula support extends to the back frame 23 department of anterior hydraulic support back timber, plays the effect of shielding cushion frame, prevents to appear leaking the cash above the cushion frame, the front portion of the base of shielding formula support 32 sets up the second and passes jack 34 and second connector 35, the bottom plate rear end that the conveyer tail supported the cushion frame sets up the articulated ear of second 36, jack 34 is passed through the second connector 35 connection to the second pass the articulated ear of second 36.
The walking type self-moving of the system is realized through the alternate supporting and matching of the two supports in the front roadway supporting part and the rear roadway supporting part.
The working principle is as follows:
with respect to the conveyor tail support pedestal portion 11: the conveyer headstock is established on adjustable bolster supporting platform 4, through the lift height of hydraulic system control telescopic jack 2, makes telescopic jack's the high adaptation working face of lift and the height of tunnel step 6, owing to put telescopic jack 2 is other, and the lift height does not receive the restriction of telescopic jack height itself, can reduce by a wide margin, and then makes the altitude mixture control scope of bolster promote by a wide margin.
Further, because the cushion frame is in the use, the conveyer aircraft nose tail can take place the working face length amount change at the in-process that advances, perhaps the conveyer appears scurrying the gliding phenomenon on the working face, at this moment, because the overlap joint of the activity of conveyer aircraft nose tail is on cushion frame supporting platform, make the conveyer aircraft nose tail slide on cushion frame supporting platform, effectively avoided cushion frame and working face and step between the groove to produce the problem of interfering, guaranteed the steady operation of system.
Regarding the front tunnel roof supporting portion 21: aiming at the problem that the front hydraulic support and the cushion frame are difficult to move, the bottom cleaning mechanism is arranged in the front of the base, the telescopic body can be driven to advance or retreat along a slide way in the bottom cleaning frame by controlling the telescopic jack to stretch, the bottom cleaning treatment of a roadway is realized, and the problems of low manual bottom cleaning efficiency and high labor intensity are solved.
Regarding the rear roof support portion 31: in order to solve the problem that the system moves forwards in a roadway, hinged lugs are arranged in the front and the back of the cushion frame, a pushing jack and a connector are arranged on the back of the front frame base and the front of the back frame base, the pushing connector is connected with the hinged lugs of the cushion frame, and the walking type self-moving of the system is realized through the matching of the front frame and the back frame.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a clear end of exempting from of colliery thin seam combined mining working face return airway is from moving formula and is protected top system which characterized in that: the supporting device comprises a conveyor tail supporting cushion frame part, a front roadway roof supporting part and a rear roadway supporting part;
the conveyor tail supporting cushion frame part comprises a bottom plate, at least two telescopic jacks, two guide plates, a supporting platform and a hydraulic system; the two guide plates are vertically fixed on the bottom plate and arranged in parallel, and vertical guide holes are respectively formed in the two guide plates; the supporting platform is a groove-shaped platform, two vertical edges of the groove-shaped platform are parallel and are tightly attached to the inner side surface of the guide plate, the bottom surface of the groove-shaped platform is a supporting surface, guide blocks are arranged on the outer sides of the two vertical edges of the groove-shaped platform corresponding to the guide holes, and connecting lugs are arranged on the guide blocks; the at least two telescopic jacks are respectively arranged on the outer sides of the two guide plates, the bottom ends of the telescopic jacks are fixed on the bottom plate, and the top ends of the telescopic jacks are hinged with the connecting lugs; the hydraulic system is connected with the telescopic jack and provides power for the telescopic jack; the height difference between the connecting lug and the supporting surface is set according to the height of the guide plate and the telescopic stroke of the telescopic jack, so that when the telescopic jack is completely retracted, the supporting surface reaches or approaches the bottom plate;
the front roadway roof supporting part comprises a front hydraulic support, a front beam and a rear frame are respectively arranged at the front and the rear of a top beam of the front hydraulic support and matched with each other to support a roof, a first pushing jack and a first connector are arranged at the rear part of a base of the front hydraulic support, a first hinge lug is arranged at the front end of a bottom plate of a conveyor tail supporting cushion frame, the first pushing jack is connected with the first hinge lug through the first connector, a bottom cleaning mechanism is arranged at the front end of the base of the hydraulic support, the bottom cleaning mechanism comprises a bottom cleaning frame, a bottom cleaning jack and a telescopic body, the telescopic body is arranged at the movable end of the bottom cleaning jack, and an inclined bottom cleaning toothed rail is arranged at the front part of the telescopic body;
the rear roadway support part comprises a shield type support, the front end of a support top beam of the shield type support extends to the rear frame of a front hydraulic support top beam, the front part of a base of the shield type support is provided with a second pushing jack and a second connector, the rear end of a bottom plate of a conveyor tail support cushion frame is provided with a second hinge lug, and the second pushing jack is connected with the second hinge lug through the second connector.
2. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 1, characterized in that: the hydraulic system is connected with an upper cavity hydraulic pipeline and a lower cavity hydraulic pipeline of the telescopic hydraulic cylinder and is provided with a bidirectional lock and a safety valve respectively.
3. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 2, characterized in that: the liquid inlet of the hydraulic system is provided with a stop valve and an automatic backwashing filter.
4. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 3, characterized in that: and an electric control speed regulating valve is arranged at a liquid inlet of the hydraulic system.
5. The bottom-cleaning-free self-moving roof protection system of the fully mechanized working face return airway of the coal mine thin seam according to any one of claims 1 to 4, wherein: the telescopic jack is provided with four guide holes, the four guide holes are correspondingly arranged on the two guide plates, the two guide blocks are correspondingly arranged on the outer sides of two vertical edges of the groove-shaped platform, each guide block is provided with a connecting lug, and the top end of each telescopic jack is hinged with one connecting lug.
6. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 5, characterized in that: the bottom cleaning frame is provided with a slideway corresponding to the telescopic body, and the telescopic body is slidably mounted in the slideway.
7. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 6, characterized in that: the rear end of the rear frame of the top beam of the front hydraulic support is connected with the front end of the top beam of the shield type support.
8. The bottom-cleaning-free self-moving roof protection system of the return airway of the fully mechanized mining face of the coal mine thin seam according to claim 7, characterized in that: the front end of the telescopic body is provided with a conical surface with a sharp angle, and a plurality of bottom cleaning toothed rails are uniformly arranged on the conical surface.
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|---|---|---|---|
| CN202110735466.6A CN113389583B (en) | 2021-06-30 | 2021-06-30 | Bottom-cleaning-free self-moving type roof protection system of return airway of fully-mechanized mining working face of coal mine thin seam |
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|---|---|---|---|
| CN202110735466.6A CN113389583B (en) | 2021-06-30 | 2021-06-30 | Bottom-cleaning-free self-moving type roof protection system of return airway of fully-mechanized mining working face of coal mine thin seam |
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| CN113389583A true CN113389583A (en) | 2021-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320418A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Coal mine working face support and control method thereof |
| CN115159023A (en) * | 2022-07-29 | 2022-10-11 | 郑州煤矿机械集团股份有限公司 | Height adjusting system and method for head and tail cushion frame of scraper conveyor |
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| CN114320418B (en) * | 2022-01-05 | 2023-11-03 | 国家能源集团国源电力有限公司 | Coal mine working face support and control method thereof |
| CN115159023A (en) * | 2022-07-29 | 2022-10-11 | 郑州煤矿机械集团股份有限公司 | Height adjusting system and method for head and tail cushion frame of scraper conveyor |
| CN115159023B (en) * | 2022-07-29 | 2023-09-01 | 郑州煤矿机械集团股份有限公司 | Scraper conveyor head and tail cushion frame height adjusting system and adjusting method |
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