CN110656963A - N-shaped fully mechanized mining support for steeply inclined coal seam - Google Patents
N-shaped fully mechanized mining support for steeply inclined coal seam Download PDFInfo
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- CN110656963A CN110656963A CN201910883024.9A CN201910883024A CN110656963A CN 110656963 A CN110656963 A CN 110656963A CN 201910883024 A CN201910883024 A CN 201910883024A CN 110656963 A CN110656963 A CN 110656963A
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- 239000003245 coal Substances 0.000 title claims abstract description 107
- 238000005065 mining Methods 0.000 title claims abstract description 79
- 239000003921 oil Substances 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 18
- 238000009423 ventilation Methods 0.000 description 13
- 230000002265 prevention Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/56—Details of locks of telescopic props
- E21D15/563—Details of locks of telescopic props by which a series of similarly shaped props can obtain an almost equal load-capacity
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
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- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
The invention relates to the technical field of hydraulic supports, in particular to an n-shaped fully-mechanized mining support for a steeply inclined coal seam, which is particularly suitable for mining the steeply inclined coal seam with the thickness of the coal seam being less than 8 meters and the inclination angle of the coal seam being more than 45 degrees, and can realize longwall type supporting mining of the coal seam. The gob shield beam is hinged with the gob hinged beam and then faces the gob, the roof side support beam, the gob shield beam, the gob hinged beam and the bottom plate side support beam are hinged to form a support with an n-shaped structure, and at least one row of two support columns is arranged between the roof side support beam and the bottom plate side support beam. The invention has reasonable and compact structure and convenient use, can be suitable for mining coal beds with different coal bed thicknesses and different coal bed angles, can effectively reduce the labor intensity and improve the operation efficiency and the mining yield.
Description
Technical Field
The invention relates to the technical field of hydraulic supports, in particular to an n-shaped fully-mechanized mining support for a steeply inclined coal seam, which is particularly suitable for mining the steeply inclined coal seam with the thickness of the coal seam being less than 8 meters and the inclination angle of the coal seam being more than 45 degrees, and can realize longwall type supporting mining of the coal seam.
Background
The three machines of the traditional hydraulic support, the traditional coal mining machine and the traditional scraper conveyor are matched with a long-wall type mining working surface, the support is arranged in a mode that a support top beam supports a top plate, a support base supports a bottom plate, and the support top beam and the support base are parallel to the bottom surface of the working surface (namely, a hole is cut), namely, the support is arranged in a c-shaped structure. The three machines consisting of the hydraulic support, the coal mining machine and the scraper conveyor are arranged along the trend of the coal bed and are propelled along the trend of the coal bed, the coal mining machine mines the coal on the coal wall at the front part of the support along the trend of the coal bed, the downward sliding force of the three machines along the working face is increased along with the increase of the inclination angle of the coal bed in the coal mining method, the operation and maintenance difficulty is increased, and the three machines cannot be used finally after the inclination angle of the coal bed is gradually increased to a certain angle. At present, the traditional three-machine matched longwall mining method used in a large-inclination-angle coal seam is continuously researched, solved and overcome the problems of support fall prevention and skid prevention when the working face angle is large and skid prevention and use of a scraper in the large-inclination-angle coal seam, and the traditional three-machine matched longwall mining method has no good solution scheme in the large-inclination-angle coal seam, particularly the coal seam with the angle gradually approaching 90 degrees.
In the mining of the steep coal seam, a flexible shield support mining method and a small-stage coal seam hydraulic support mining process are adopted for mining the steep coal seam with the coal seam thickness of less than 8 meters and the coal seam inclination angle of more than 45 degrees, but all the defects exist, and the mining method is not suitable for the mining of the steep coal seam. The coal seam has no supporting, supporting and mining equipment which is reliable and practical and is matched with the coal seam for use, and the coal seam has to be abandoned for mining at present.
The flexible shield support mining method is characterized in that a return air crossheading parallel to the horizontal plane is arranged at the middle upper part of a steep coal seam, a transportation crossheading parallel to the horizontal plane is arranged at the lower part away from the return air crossheading by a certain distance, a working face roadway penetrates between an upper roadway and a lower roadway, and the included angle between the working face roadway and the horizontal plane is about 20-40 degrees. In the process that the flexible shield support is pushed downwards, the lower shield support gradually enters the transportation gateway, and the support entering the transportation gateway needs to be continuously transported to the upper return air gateway for support supplement, so that the labor intensity is high. In addition, the bracket is applicable to a small range of coal seam thickness, the coal seam is lost when being thickened, the coal seam cannot be used when being thinned, different coal seam changes need to be provided with flexible shield brackets with different lengths, and the problems of inconvenience in use, low mechanical mining efficiency, high labor intensity, low yield, instability of the bracket, poor safety and the like exist.
The method adopts a small-stage coal seam hydraulic support mining process, the roadway of the support is arranged in a way that a return air crossheading parallel to a horizontal plane is arranged at the middle upper part of a steep coal seam, a transportation crossheading parallel to the horizontal plane is arranged at the lower part which is about 20 meters away from the return air crossheading, and a ventilation hole with the diameter of about 800mm is arranged between an upper roadway and a lower roadway at the interval of 6 meters so that the upper roadway and the lower roadway are communicated to form U-shaped ventilation. The support is arranged in the lower transportation crossheading channel, and the advancing direction of the support is to push forwards along the transportation crossheading. According to the arrangement mode, the ventilation holes in the rear part and the upper part of the support cannot realize U-shaped ventilation due to collapse damage or support top beam shielding, the ventilation holes in the front part of the support can realize U-shaped ventilation, but fresh air cannot reach the working position of the support, the working position of the support is a blind roadway, so that gas gathering is easy to bring great potential safety hazard, in 2016, the safety U-shaped ventilation system cannot be constructed due to a single-thick coal-seam horizontal subsection top coal caving coal mining method with a steep inclination of 4-8 meters, the risk of gathering toxic and harmful gas in the working face exists, and the U-shaped ventilation system is eliminated by a coal security inspection department, and the conventional equipment and mining.
Disclosure of Invention
The invention provides an n-shaped fully-mechanized mining bracket for a steep coal seam, overcomes the defects of the prior art, and can effectively solve the problems of ventilation and long-wall type mechanized mining of the conventional bracket in the mining process of the steep coal seam. The coal bed which can not be exploited is changed into the coal bed which can be exploited again, the exploitation efficiency of the coal bed can be greatly improved, the safety is improved, and the automatic exploitation level is improved.
The technical scheme of the invention is realized by the following measures: the n-shaped fully-mechanized mining support is characterized by comprising a top plate side supporting beam positioned on the top plate side, a goaf shielding beam, a goaf hinged beam, a bottom plate side supporting beam positioned on the bottom plate side and a stand column, wherein the goaf shielding beam is hinged with the goaf hinged beam and then faces the goaf, the top plate side supporting beam, the goaf shielding beam, the goaf hinged beam and the bottom plate side supporting beam are hinged to form a support of an n-shaped structure, at least one row of supporting stand columns are arranged between the top plate side supporting beam and the bottom plate side supporting beam, each row of supporting stand columns comprise two supporting stand columns which are arranged in parallel, and a pushing oil cylinder used for pushing a scraper conveyor is arranged at the lower parts of the top plate side supporting beam and the bottom plate side supporting beam.
The following is further optimization or/and improvement of the technical scheme of the invention:
the upper part of the roof side supporting beam is hinged with a goaf shield beam, the upper part of the floor side supporting beam is hinged with a goaf hinged beam, and the goaf shield beam and the goaf hinged beam are hinged together; at least one row of supporting columns are arranged between the top plate side supporting beam and the bottom plate side supporting beam, one end of each row of supporting columns is connected with the top plate side supporting beam, and the other end of each row of supporting columns is connected with the bottom plate side supporting beam.
And a balance jack is also arranged between the upper part of the top plate side supporting beam and the gob shield beam, one end of the balance jack is hinged with the top plate side supporting beam, and the other end of the balance jack is hinged with the gob shield beam.
Two rows of supporting columns are arranged between the top plate side supporting beam and the bottom plate side supporting beam.
The goaf hinged beam can comprise a first hinged beam and a second hinged beam, two ends of the first hinged beam are hinged with the upper ends of the goaf shield beam and the bottom plate side support beam respectively, two ends of the second hinged beam are hinged with the upper portions of the goaf shield beam and the bottom plate side support beam respectively, and the first hinged beam, the second hinged beam, the goaf shield beam and the bottom plate side support beam jointly form a four-link mechanism.
The lower parts of the top plate side supporting beam and the bottom plate side supporting beam are respectively provided with a telescopic leg for lifting the support, and the telescopic legs are driven by a hydraulic oil cylinder to extend and retract.
The n-shaped fully-mechanized mining support for the steeply inclined coal seam comprises a plurality of n-shaped fully-mechanized mining supports for the steeply inclined coal seam, the n-shaped fully-mechanized mining supports for the steeply inclined coal seam are arranged along the working face, the top plate side supporting beams of every two adjacent n-shaped fully-mechanized mining supports for the steeply inclined coal seam are connected together through a left pull frame oil cylinder, and the bottom plate side supporting beams of every two adjacent n-shaped fully-mechanized mining supports for the steeply inclined coal seam are connected together through a right pull frame oil cylinder.
The three-machine matching capability of the invention is strong, the three-machine matching device can be matched with a coal mining machine and a scraper machine, the coal bed adaptability is strong, and the invention is suitable for mining the steeply inclined coal bed with the coal bed thickness of less than 8 meters and the coal bed inclination angle of more than 45 degrees. Through the arrangement of the n-shaped structural support, the coal bed which cannot be mined is changed into a coal bed which can be mined again, the mining efficiency of the coal bed can be greatly improved, the safety is improved, and the automatic mining level is improved. The n-shaped fully mechanized mining support of the adjacent steep coal seam is pulled to move upwards integrally, so that the support is prevented from jumping into a transportation crossheading in the operation process, the lower support is prevented from working towards the upper return air crossheading reversing frame, the labor intensity is effectively reduced, and the operation efficiency is improved.
Drawings
FIG. 1 is a schematic front view of the present invention.
Fig. 2 is a schematic structural view of the arrangement of a return air crossheading, a working face roadway and a transportation crossheading in a main view.
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2.
FIG. 4 is a schematic diagram of the moving track of n-shaped fully-mechanized mining supports of two adjacent steeply inclined coal seams in the invention.
The codes in the figures are respectively: the mining area shield beam comprises a top plate side supporting beam 1, a goaf shielding beam 2, a goaf hinged beam 3, a first hinged beam 3-1, a second hinged beam 3-2, a bottom plate side supporting beam 4, a supporting upright column 5, a telescopic leg 6, a vertical shaft 7, an air return crossheading 8, a working face roadway 9, a transportation crossheading 10, a coal bed 11, a top plate 12, a bottom plate 13, a right-side pull frame oil cylinder 14, a balance jack 15, a left-side pull frame oil cylinder 16, an A support and a B support, wherein the top plate side supporting beam, the bottom plate side supporting beam, the telescopic leg, the vertical shaft 7, the air return crossheading, the left-side pull frame oil cylinder 14, the right-side pull frame oil cylinder 14, the balance.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
example 1: as shown in the attached drawings 1 to 4, the n-shaped fully mechanized mining support for the steeply inclined coal seam is perpendicular to the bottom surface of a working face for supporting and propelling operation along the trend of the coal seam 11, and comprises a top plate side supporting beam 1 positioned on the side of a top plate 12, a goaf shielding beam 2, a goaf hinged beam 3, a bottom plate side supporting beam 4 positioned on the side of a bottom plate 13 and supporting columns 5, wherein the goaf shielding beam 2 is hinged with the goaf hinged beam 3 to face the goaf, the top plate side supporting beam 1, the goaf shielding beam 2, the goaf hinged beam 3 and the bottom plate side supporting beam 4 are hinged to form a support with an n-shaped structure, at least one row of supporting columns is arranged between the top plate side supporting beam 1 and the bottom plate side supporting beam 4, each row of supporting columns comprises two supporting columns 5 which are arranged in parallel, and pushing cylinders for pushing a scraper conveyor are arranged at the lower parts of the top plate. The supporting upright 5 is known in the art and generally uses a hydraulic prop, and a thrust cylinder is provided to facilitate connection and movement with the scraper.
The technical scheme of the invention is that the c-shaped structural support arrangement of a traditional three-machine matched long-wall mining working face is changed into n-shaped structural support arrangement, the specific method is that a working face roadway is in pseudo-inclined arrangement, a support top beam (namely, a top plate side supporting beam 1 of the invention) supports a top plate 12, a support base (namely, a bottom plate side supporting beam 4 of the invention) supports a bottom plate 13, the support top beam and the base are changed from parallel arrangement with the bottom surface of the working face (namely, a hole cutting) to arrangement perpendicular to the bottom surface of the working face, and the stretching and folding of two side beams are realized through an upright post 5 connected between the top plate side supporting beam 1 and the bottom plate side supporting beam 4, so that the top plate side supporting beam 1 and the top plate 12 are supported in close contact, and the bottom plate side 4 and the bottom plate. This ensures the stability of the invention. For coal seams with different thicknesses, the top plate side supporting beam 1 is tightly contacted with the top plate 12 through the telescopic supporting upright post 5, and the bottom plate side supporting beam 4 is tightly contacted with the bottom plate 13, so that the invention is suitable for supporting requirements of different coal seam thicknesses and coal seam angles.
According to the actual need, the n-shaped fully mechanized mining bracket for the steeply inclined coal seam can be further optimized or/and improved:
as shown in the attached drawings 1 to 4, the upper part of a roof side supporting beam 1 is hinged with a goaf shield beam 2, the upper part of a floor side supporting beam 4 is hinged with a goaf hinged beam 3, and the goaf shield beam 2 and the goaf hinged beam 3 are hinged together; at least one row of supporting columns are arranged between the top plate side supporting beam 1 and the bottom plate side supporting beam 4, one end of each row of supporting columns 5 is connected with the top plate side supporting beam 1, and the other end of each row of supporting columns 5 is connected with the bottom plate side supporting beam 4. During operation, the coal mining machine is arranged in a working face roadway 9, the top plate side supporting beam 1 and the bottom plate side supporting beam 4 are respectively contacted with the top plate 12 and the bottom plate 13 and tightly support the top plate 12 and the bottom plate 13 under the action of the upright post 5, so that the bottom plate side supporting beam 4, the top plate side supporting beam 1, the goaf shield beam 2 and the goaf hinged beam 3 and the working face roadway 9 jointly form a front-rear through operation space, the coal mining machine operates below the coal mining machine, a safe operation area is provided for the coal mining machine, the operation space can be used as an air duct in mining operation, normal operation of the coal mining machine is guaranteed, and safety accidents caused by unsmooth ventilation are avoided.
As shown in the attached figures 1 and 3, a balance jack 15 is further arranged between the upper part of the top plate side supporting beam 1 and the goaf shield beam 2, one end of the balance jack 15 is hinged with the top plate side supporting beam 1, and the other end of the balance jack 15 is hinged with the goaf shield beam 2. Therefore, the invention has better balance performance in the operation process.
Two rows of supporting columns are arranged between the top plate side supporting beam 1 and the bottom plate side supporting beam 4 according to requirements. The invention can be designed without a balance jack 15 and is provided with two rows of supports for supporting the upright posts 5, thus achieving better balance performance.
As shown in the attached drawings 1 and 3, the goaf hinged beam 3 comprises a first hinged beam 3-1 and a second hinged beam 3-2, two ends of the first hinged beam 3-1 are hinged with the upper ends of the goaf shield beam 2 and the floor side support beam 4 respectively, two ends of the second hinged beam 3-2 are hinged with the upper portions of the goaf shield beam 2 and the floor side support beam 4 respectively, and the first hinged beam 3-1, the second hinged beam 3-2, the goaf shield beam 2 and the floor side support beam 4 jointly form a four-link mechanism. This enables stable support to be maintained when the positions of the roof side brace 1 and the floor side brace 4 are changed relative to each other.
As shown in fig. 1 and 3, telescopic legs 6 for lifting and lowering the support are arranged at the lower parts of the top plate side supporting beam 1 and the bottom plate side supporting beam 4, and the telescopic legs 6 are driven to extend and retract by hydraulic cylinders or jacks arranged on the top plate side supporting beam 1 and the bottom plate side supporting beam 4. Therefore, the vertical height of the top plate side supporting beam 1 and the bottom plate side supporting beam 4 can be adjusted, and the support is driven to move downwards.
Example 2: as shown in the attached figure 2, the steeply inclined coal seam is mined horizontally in sections, a return air crossheading 8 is horizontally arranged along the direction of the coal seam 11 at the upper part of the section, and a transportation crossheading 10 is horizontally arranged along the direction of the coal seam at the lower part of the section to reach the boundary of a mining area. The cutting holes (working face laneways 9) are obliquely arranged along the direction of the coal seam, the included angle range of the cutting holes and the transportation crossheading 10 is 8 degrees to 40 degrees, the return air crossheading 8 and the transportation crossheading 10 are communicated with the ground through a vertical shaft 7, as shown in the attached drawing 3, the rock stratum at the left part of the working face laneways 9 is a top plate 12, and the rock stratum at the right part of the working face laneways 9 is a bottom plate 13. Arranging a plurality of n-shaped fully-mechanized mining supports of steeply inclined coal seams along a working face roadway 9 as required, connecting top plate side supporting beams 1 of every two adjacent n-shaped fully-mechanized mining supports of the steeply inclined coal seams together through a left pull frame oil cylinder 16, connecting bottom plate side supporting beams 4 of every two adjacent n-shaped fully-mechanized mining supports of the steeply inclined coal seams together through a right pull frame oil cylinder 14, matching support three machines as shown in figure 4, wherein the support top plate side supporting beams 1 appropriately shrink telescopic legs 6, coal mining rollers cut and mine coal at the lower parts of the telescopic legs 6, the telescopic legs 6 of the support top plate side supporting beams 1 extend out for supporting, pushing a scraper conveyor to the cut working face at the lower parts of steps through pushing oil cylinders connected with the support top plate side supporting beams 1 after mining for a certain width, continuing mining towards the support bottom plate side supporting beams 4, and when mining the coal at the lower parts of the support bottom plate side supporting beams 4, appropriately shrinking the telescopic legs 6 of the support bottom plate side, the shearer drum cuts and mines coal at the lower part of the telescopic leg. The telescopic legs 6 of the support beams 4 on the roof side of the support after mining are extended and supported. After all the coal in a working face is mined, the working face support sequentially relieves pressure from bottom to top, the telescopic leg is retracted, the support falls for a working distance in the direction of the drawing (102). The support A is pulled upwards through the oil cylinder, the top plate 12 and the bottom plate 13 are tightly supported through the support A, the upright post 5 of the support B is properly decompressed, the support A is adopted to pull the support B to move upwards to realize the movement of the support B towards the arrow direction of the display (101), the working face support is integrally moved upwards for a working distance through the method, so that the support is moved towards the arrow direction (103) as a whole, the coal mining of the working face is realized and all coal is mined through the continuous movement of the working face support towards the arrow direction (103), the n-shaped fully-mechanized mining support of the steeply inclined coal seam is prevented from jumping into the transportation crossheading 10 in the operation process, the phenomenon that the lower support works towards the upper return air crossheading reversing frame is avoided, the labor intensity is effectively reduced, and the operation efficiency is improved. The support moves in the direction (103) on the whole through the comprehensive movement in the two directions, the coal on the working face is extracted completely through the continuous movement of the support on the working face in the direction of the arrow (103), and the support can be effectively prevented from falling into the transportation crossheading 10 and being replaced to the return air crossheading 8 through the method.
In addition, the invention is positioned in the working face roadway 9 and forms a ventilation channel communicated with the transportation crossheading 10 and the return air crossheading 8 on the inner side of the working face roadway 9, even if the working face roadway 9 is horizontally pushed along with mining, the U-shaped ventilation formed by the invention and the transportation crossheading 10 and the return air crossheading 8 is not damaged all the time, the ventilation performance in mining operation is effectively ensured, and the operation safety coefficient is improved.
Claims (8)
1. The n-shaped fully-mechanized mining support is characterized by comprising a top plate side supporting beam positioned on the top plate side, a goaf shielding beam, a goaf hinged beam, a bottom plate side supporting beam positioned on the bottom plate side and a stand column, wherein the goaf shielding beam is hinged with the goaf hinged beam and then faces the goaf, the top plate side supporting beam, the goaf shielding beam, the goaf hinged beam and the bottom plate side supporting beam are hinged to form a support of an n-shaped structure, at least one row of supporting stand columns are arranged between the top plate side supporting beam and the bottom plate side supporting beam, each row of supporting stand columns comprise two supporting stand columns which are arranged in parallel, and pushing oil cylinders used for pushing a scraper conveyor are arranged on the lower portions of the top plate side supporting beam and the bottom plate side supporting beam.
2. The n-shaped fully mechanized mining support for the steeply inclined coal seam according to claim 1, wherein the upper part of the top plate side supporting beam is hinged with a goaf shield beam, the upper part of the bottom plate side supporting beam is hinged with a goaf hinged beam, and the goaf shield beam and the goaf hinged beam are hinged together; at least one row of supporting columns are arranged between the top plate side supporting beam and the bottom plate side supporting beam, one end of each row of supporting columns is connected with the top plate side supporting beam, and the other end of each row of supporting columns is connected with the bottom plate side supporting beam.
3. The fully mechanized mining support for the n-shaped steeply inclined coal seam according to claim 2, wherein a balance jack is further provided between the upper portion of the roof side supporting beam and the gob shield beam, one end of the balance jack is hinged with the roof side supporting beam, and the other end of the balance jack is hinged with the gob shield beam.
4. The fully mechanized mining support for n-shaped steeply inclined coal seams according to claim 2, wherein two rows of support pillars are arranged between the roof side supporting beam and the floor side supporting beam.
5. The n-shaped fully mechanized mining support for the steeply inclined coal seam according to claim 1, 2, 3 or 4, wherein the goaf articulated beam comprises a first articulated beam and a second articulated beam, two ends of the first articulated beam are respectively articulated with the upper ends of the goaf shield beam and the floor side supporting beam, two ends of the second articulated beam are respectively articulated with the upper parts of the goaf shield beam and the floor side supporting beam, and the first articulated beam, the second articulated beam, the goaf shield beam and the floor side supporting beam together form a four-bar linkage.
6. The n-shaped fully mechanized mining support for the steeply inclined coal seam according to claim 1, 2, 3 or 4 is characterized in that telescopic legs for lifting the support are arranged at the lower parts of the top plate side supporting beam and the bottom plate side supporting beam, and the telescopic legs are driven to extend and retract by a hydraulic oil cylinder.
7. The fully mechanized mining support for the n-shaped steeply inclined coal seam of claim 5, wherein telescopic legs for lifting the support are arranged at the lower parts of the top plate side supporting beam and the bottom plate side supporting beam, and the telescopic legs are driven to extend and retract by a hydraulic oil cylinder.
8. The fully-mechanized mining support for the n-shaped steeply inclined coal seam according to any one of claims 1 to 7, comprising a plurality of fully-mechanized mining supports for the n-shaped steeply inclined coal seam, which are arranged along a working face, wherein the roof side supporting beams of each two adjacent fully-mechanized mining supports for the n-shaped steeply inclined coal seam are connected together through a left-pull frame oil cylinder, and the floor side supporting beams of each two adjacent fully-mechanized mining supports for the n-shaped steeply inclined coal seam are connected together through a right-pull frame oil cylinder.
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| CN201910883024.9A CN110656963A (en) | 2019-09-18 | 2019-09-18 | N-shaped fully mechanized mining support for steeply inclined coal seam |
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|---|---|---|---|---|
| US4268193A (en) * | 1979-11-29 | 1981-05-19 | Fletcher Sutcliffe Wild Limited | Mine roof supports |
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| CN102116163A (en) * | 2010-12-10 | 2011-07-06 | 李泽宇 | Vertical hydraulic bracket |
| CN102373937A (en) * | 2011-09-30 | 2012-03-14 | 天地科技股份有限公司 | Rhombic hydraulic support for pseudo-inclined down mining working surface of steep coal seam |
| CN205013026U (en) * | 2015-09-08 | 2016-02-03 | 四川华蓥山广能集团嘉华机械有限责任公司 | Hydraulic support is adopted to pseudo - combining to one side of bowing |
| CN108397195A (en) * | 2018-02-13 | 2018-08-14 | 天地科技股份有限公司 | Steep-inclined thick coal seam mechanical coal mining system and coal-mining method |
| CN208587180U (en) * | 2018-07-27 | 2019-03-08 | 山东矿机华能装备制造有限公司 | Adapt to a variety of coal winning technology hydraulic supports |
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