CN108979695A - Unilateral eccentrically arranged type hydraulic support combination - Google Patents
Unilateral eccentrically arranged type hydraulic support combination Download PDFInfo
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- CN108979695A CN108979695A CN201811062662.6A CN201811062662A CN108979695A CN 108979695 A CN108979695 A CN 108979695A CN 201811062662 A CN201811062662 A CN 201811062662A CN 108979695 A CN108979695 A CN 108979695A
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- hand offset
- eccentrically arranged
- arranged type
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- 239000003245 coal Substances 0.000 claims abstract description 27
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000009423 ventilation Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241001080929 Zeugopterus punctatus Species 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of unilateral eccentrically arranged type hydraulic supports to combine, unilateral side eccentrically arranged type hydraulic support combination is used with several comprehensive hydraulic support assorteds of standard of putting, it includes, left avertence sets hydraulic support and sets the right-hand offset hydraulic support that hydraulic support is in mirror symmetry with the left avertence, the top structure that the left avertence sets hydraulic support biases to the left towards coal wall direction, it is 200 ~ 300mm that the left avertence, which sets the horizontal distance between the top beam center line of hydraulic support and its base centerline, the top structure of the right-hand offset type bracket biases to the right towards coal wall direction, horizontal distance between the top beam center line and its base centerline of the right-hand offset hydraulic support is 200 ~ 300mm, the left avertence sets and forms working space between hydraulic support and the right-hand offset hydraulic support.The present invention solves between hydraulic support frames in the prior art the problems such as channel is narrow, be unable to pedestrian, maintenance, ventilation, difficult cooling and arrangement special installation.
Description
Technical field
The invention belongs to coal mining technology fields, are related to a kind of equipment of coal mine fully-mechanized mining working, especially put with comprehensive
The unilateral eccentrically arranged type hydraulic support combination that the hydraulic support assorted of standard uses.
Background technique
Longwall top coal caving exploits significant technology and achievement in the world as coal in China, in recent years in thick and special thick coal
The application of layer is more extensive.Longwall top coal caving exploits its hydraulic support weight and coalcutter installation function compared to high working face full-seam mining
Rate is lower, small investment, less energy consumption；The expenses such as false top, driving, artificial are saved compared to separate zone production, electric power is saved and increases coal
Lump coal rate；Coal breakage is pressed using mine, is a kind of coal-mining method of low energy consumption；The practicable piecewise-parallel operation of Full-mechanized Mining Face,
Mines in different section and put coal while carrying out, it is per unit area yield height, high-efficient.But longwall top coal caving compare full-seam mining exploitation due to
Need to put coal process, therefore technique is relative complex, and need to arrange a drag conveyor at bracket rear portion, increases daily maintenance
Workload and difficulty.
Currently, national underground mine is averaged mining depth close to 500m, mining depth is more than that the mine of 800m reaches more than 200
Locate, at km deep-well 47.Increasing with mining depth, strata behaviors intensity increases, and hydraulic support working resistance is continuously increased,
Hydraulic support working resistance is determined by the cylinder diameter of column, and the more big then cylinder diameter of working resistance is bigger, walkway, operation and dimension
It is smaller to repair space；In addition the temperature of air and surrounding rock body increases in Deep Mine, and deep mining is faced with high temperature threat, needs
Increase space or arrangement cooling system to improve worker's operating environment.
As shown in figure 3, for the comprehensive pedestal for putting standard hydraulic support of one group of model ZF15000/19/32 in the prior art
The structural schematic diagram that (not showing column and top structure) connect with scratch board conveyor, the current model ZF15000/19/32 of coal mine
Hydraulic support is that big work hinders caving roof coal hydraulic support, and the center of bracket is away from for 1750mm, and the working resistance of the bracket is big, column cylinder
Diameter is big, and the channel size that rear portion drag conveyor is led between frame is smaller, causes worker that can not can not carry out just before frame to after frame
Normal equipment inspection and maintenance；Such as when needing to clear up overload on the scratch board conveyor of rear portion and chain rupture occurs for rear portion drag conveyor
Etc. accidents or need check, maintenance when, operator can only enter hydraulic support by the head and tail of scratch board conveyor
Rear portion transport space is operated, and the time needed into accident point is relatively long, cannot handle in time, and efficiency is lower, safety
Property is poor.Conventional hydraulic bracket is not able to satisfy the demand at present.
In addition the coal mine buried depth is big, ground temperature is high, and the section that front cold air leads to rear portion is small, is unfavorable for rear portion cooling；It should
Coal mine seam hardness is big, and Top coal caving characteristic is general, and partial region needs overhead caving, and narrow space between frame can not arrange that pressure is put
Push up equipment.
Summary of the invention
The purpose of the present invention is to solve the above problem and it is hydraulic to provide a kind of unilateral eccentrically arranged type for increasing working space
Holder combination.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that.
The combination of unilateral eccentrically arranged type hydraulic support, unilateral side eccentrically arranged type hydraulic support combination and several comprehensive puts standard hydraulic support
It being used cooperatively, it includes, and left avertence sets hydraulic support and sets the right-hand offset hydraulic support that hydraulic support is in mirror symmetry with the left avertence,
The top structure that the left avertence sets hydraulic support biases to the left, which sets the top beam center line and its base center of hydraulic support
Horizontal distance between line is 200 ~ 300mm, and the top structure of the right-hand offset type bracket biases to the right, the hydraulic branch of the right-hand offset
Horizontal distance between the top beam center line and its base centerline of frame is 200 ~ 300mm, which sets hydraulic support and the right side
Working space is formed between offset hydraulic bracket.
Preferably, the width of the working space is 600 ~ 800mm.
Preferably, it is to weld in the left side of the 1.5 meters of top structures of center away from hydraulic support that the left avertence, which sets hydraulic support,
Body structure, the right-hand offset hydraulic support are the right side welding casing knot in the 1.5 meters of top structures of center away from hydraulic support
Structure, the width of the body structure are 200 ~ 300mm, which sets the cylinder diameter of hydraulic support and the column of the right-hand offset hydraulic support
For 280mm, 300mm or 320mm.
It is bottom of 1.5 meters of centers away from hydraulic support that the left avertence, which sets hydraulic support and the pedestal of the right-hand offset hydraulic support,
Seat, it is top knot of 1.75 meters of centers away from hydraulic support which, which sets hydraulic support and the top structure of the right-hand offset hydraulic support,
Structure, the top beam needling position of the top structure and the needling position of the pedestal are corresponding, which sets hydraulic support and the right-hand offset
The cylinder diameter of the column of hydraulic support is 280mm, 300mm or 320mm.
Beneficial effects of the present invention.
1, the present invention increases operation sky by configuring unilateral eccentrically arranged type hydraulic support combination in standard hydraulic support
Between, which is 600 ~ 800mm, and very good solution worker is directly entered hydraulic support rear portion fortune by the working space
Defeated space carries out the operations such as coal and the scratch board conveyor chain rupture maintenance of the overload on cleaning rear portion scratch board conveyor, into accident point
It is handled relatively in time, it is high-efficient；Especially for longwall top coal caving, be conducive to create greater room progress rear portion drag conveyor
Etc. equipment maintenance, maintenance.When worker is in hydraulic support rear work, when being in an emergency, the working space can be passed through
Quickly withdraw.
2, draught area is increased, it is distinguished and admirable smooth to be conducive to working face, especially for high working face, High-geotemperature mine, favorably
In reducing working face temperature, comfortable working space is provided for worker's work.
3, be conducive to hang refrigeration equipment.Be conducive to arrange grouting equipment.Be conducive to arrange overhead caving equipment.
With reference to the accompanying drawing and preferred forms the present invention will be further described so that the public have to summary of the invention it is whole
Body and adequately understanding, and not the scope of the present invention is defined, preceding sections have fully disclosed the present invention can
With the protection scope of implementation, therefore all any equivalent replacements well known in the art carried out according to the disclosure of invention, belong to
In to infringement of the invention.
Detailed description of the invention
Fig. 1 puts the hydraulic support assorted using state structure diagram of standard with comprehensive for the present invention.
Fig. 2 is that base portion (column and top structure are not shown) of the invention is matched with the comprehensive pedestal for putting standard hydraulic support
Conjunction state and the structural schematic diagram being connect with scratch board conveyor.
Fig. 3 is that the comprehensive base portion for putting standard hydraulic support of one group of model is connect with scratch board conveyor in the prior art
Structural schematic diagram.
Fig. 4 is the top beam body structure used in a kind of preferred structure of the present invention.
Fig. 5 is that working face arrangement schematic diagram is applied in present invention citing.
1: left avertence sets hydraulic support, and 2: right-hand offset hydraulic support, 3: working space, 4: comprehensive to put standard hydraulic support.
Specific embodiment
As shown in Figure 1 to Figure 2, unilateral eccentrically arranged type hydraulic support of the invention combination, the unilateral side eccentrically arranged type hydraulic support group
Conjunction is used cooperatively with several comprehensive standard hydraulic supports 4 of putting, which, which combines to be arranged in, several comprehensive puts standard
The middle position of hydraulic support, unilateral side eccentrically arranged type hydraulic support combination include that left avertence sets hydraulic support 1 and sets liquid with the left avertence
Pressing bracket 1 is in the right-hand offset hydraulic support 2 of mirror symmetry, which sets the top structure of hydraulic support 1 relative to eccentrically arranged type liquid
The column and pedestal for pressing bracket 1 bias to the left, which sets between the top beam center line of hydraulic support and its base centerline
Horizontal distance L be 200 ~ 300mm, column of the top structure of the right-hand offset type bracket 2 relative to the right-hand offset hydraulic support 1
It is biased to the right with pedestal, the horizontal distance L between the top beam center line and its base centerline of the right-hand offset hydraulic support is
200 ~ 300mm, therefore, the left avertence set formation working space 3 between hydraulic support 1 and the right-hand offset hydraulic support 2.The left avertence
It sets and refers to and set towards coal wall direction left avertence, the right-hand offset refers to towards coal wall direction right-hand offset.
Preferably, the width of the working space 3 is 600 ~ 800mm.
Preferably, it is to weld in the left side of the 1.5 meters of top structures of center away from hydraulic support that the left avertence, which sets hydraulic support,
Body structure, the right-hand offset hydraulic support are the right side welding casing knot in the 1.5 meters of top structures of center away from hydraulic support
Structure, the width of the body structure are 200 ~ 300mm.
Left side offset hydraulic bracket body structure is as shown in figure 4, right side offset hydraulic bracket body structure is as shown in Figure 5.
It is 280mm, 300mm or 320mm that the left avertence, which sets hydraulic support 1 and the cylinder diameter of the column of the right-hand offset hydraulic support 2,.
It can also be another structure, the left avertence sets hydraulic support 1 and the pedestal of the right-hand offset hydraulic support 2 is
The 1.5 meters of pedestals of center away from hydraulic support, it is 1.75 which, which sets hydraulic support and the top structure of the right-hand offset hydraulic support,
Top structure of the meter Zhong Xin away from hydraulic support, the top beam needling position of the top structure and the needling position of the pedestal are corresponding.
Left avertence sets the top structure of hydraulic support as unilateral offset design, and offset design refers to using its base centerline as base
Standard, the center line of top structure with respect to the pedestal center line to 200 ~ 300mm of right-hand offset, top structure include face guard,
Front-axle beam, extensible canopy, top beam, caving shield, tail boom, plate, centered on the top structure away from the hydraulic support for 1750mm；
The top structure of right-hand offset hydraulic support is unilateral offset design, and offset design refers on the basis of its base centerline,
The center line of its top structure biases 200 ~ 300mm with respect to the center line of the pedestal to the left, and top structure includes face guard, preceding
Beam, extensible canopy, top beam, caving shield, tail boom, plate, centered on the top structure away from the hydraulic support for 1750mm；
It is mirror symmetry shape that left avertence, which sets hydraulic support and right-hand offset hydraulic support, and base width is according to the calculating need of floor pressure ratio Air holder
Ask and may be designed as 135mm, front-axle beam, top beam, caving shield, tail boom, face guard width may be designed as according to Roof Control demand
1660mm。
The right side side guard plate of right-hand offset hydraulic support is movable, and stroke is not less than 50mm；Left avertence sets side on the left of hydraulic support
Backplate is movable, and stroke is not less than 50mm.
Left avertence sets hydraulic support and the respective pedestal of right-hand offset hydraulic support, column, front and rear connecting rods, push rod according to bracket
Center is designed away from 1500mm；Through different wide, the unilateral eccentrically arranged type designs in top bottom, between two left and right offset hydraulic brackets
Working space is formed, the spacing of the working space is in 600 ~ 800mm.
It is exemplified below.
Such as: face length is about 155m, every 10 frame configure 8 framves it is comprehensive put standard hydraulic support (ZF12000/19/32,
Carriage center is away from 1.5m) and 1 unilateral eccentrically arranged type hydraulic support combination, 10 hydraulic branch of unilateral eccentrically arranged type of entire coal face configuration
Frame, which combines, and 80 framves are comprehensive puts standard hydraulic support.Big channel working space between 10 operation frames of formation altogether.Unilateral eccentrically arranged type is hydraulic
Holder combination selects the preferred structure, i.e., puts standard hydraulic support ZF12000/19/32 supporting intensity according to comprehensive, unilateral side is partially
It sets the combination of type hydraulic support and selects 320mm cylinder diameter column, left avertence sets the working resistance of hydraulic support 1 and right-hand offset hydraulic support 2
Respectively 12000kN, model ZF15000/19/32, base width 1330mm, top beam width are 1660mm, and left avertence is set
Hydraulic support is at 1.5 meters of centers away from hydraulic support, that is, comprehensive top structure for putting standard hydraulic support ZF12000/19/32 left side
Side welding casing structure, right-hand offset hydraulic support are to put standard hydraulic support away from hydraulic support, that is, comprehensive at 1.5 meters of centers
The right side welding casing structure of the top structure of ZF12000/19/32, the width of the body structure is 300mm.Unilateral eccentrically arranged type
It is hydraulic support center away from for 1500mm pattern that hydraulic support, which combines its base width,.10 operation skies can be formed in working face
Between, which has 3 effects, first is that can be used as the walkway that equipment inspection and maintenance is carried out into back space, two
It is that can be used as increase ventilation, reduce the ventilation gallery or cooling system arrangement space of working face temperature, third is that can be used as strong
The working space of caving advancing equipment and construction processed.
Such as: face length is about 175m, every 10 frame configure 8 framves it is comprehensive put standard hydraulic support (ZF15000/19/32,
Carriage center is away from 1.75m) and 1 unilateral eccentrically arranged type hydraulic support combination, entire coal face configuration 10 unilateral eccentrically arranged types it is hydraulic
Holder combination and 80 framves are comprehensive puts standard hydraulic support.Big channel working space between 10 operation frames of formation altogether, layout drawing such as Fig. 5 institute
Show.Another structure is selected in unilateral eccentrically arranged type hydraulic support combination, i.e., puts standard hydraulic support ZF15000/ according to comprehensive
300mm cylinder diameter column is selected in 19/32 supporting intensity, unilateral eccentrically arranged type hydraulic support combination, and left avertence sets hydraulic support 1 and right-hand offset
The working resistance of hydraulic support 2 is respectively 12000kN, model ZF12000/19/32, base width 1330mm, top beam
Width is 1660mm, and beam structure pattern is identical as ZF15000/19/32, and base width is hydraulic support center away from for 1500mm
Pattern.10 working spaces can be formed in working face, which has 3 effects, first is that can be used as into back space into
The walkway of row equipment inspection and maintenance, second is that can be used as the ventilation gallery or drop for increasing ventilation, reducing working face temperature
Warm equipment arrangement space, third is that can be used as the working space of overhead caving advancing equipment and construction.
Claims (5)
1. unilateral eccentrically arranged type hydraulic support combination, it is characterised in that: unilateral side eccentrically arranged type hydraulic support combination and several comprehensive put mark
Quasi- hydraulic support is used cooperatively, it includes, and left avertence sets hydraulic support and sets the right avertence that hydraulic support is in mirror symmetry with the left avertence
Hydraulic support is set, the top structure which sets hydraulic support biases to the left, which sets the top beam center line of hydraulic support
Horizontal distance between its base centerline is 200 ~ 300mm, and the top structure of the right-hand offset type bracket biases to the right, should
Horizontal distance between the top beam center line and its base centerline of right-hand offset hydraulic support is 200 ~ 300mm, which sets liquid
Working space is formed between pressure bracket and the right-hand offset hydraulic support.
2. single layer eccentrically arranged type hydraulic support according to claim 1 combination, it is characterised in that: the left avertence set refer to towards
Coal wall direction left avertence is set, and the right-hand offset refers to towards coal wall direction right-hand offset.
3. eccentrically arranged type hydraulic support combination in unilateral side according to claim 1, it is characterised in that: the width of the working space
For 600 ~ 800mm.
4. eccentrically arranged type hydraulic support combination in unilateral side according to claim 1 or 2, it is characterised in that: the left offset hydraulic
Bracket is the left side welding casing structure in the 1.5 meters of top structures of center away from hydraulic support, and the right-hand offset hydraulic support is
In the right side welding casing structure of the 1.5 meters of top structures of center away from hydraulic support, the width of the body structure is 200 ~
300mm, it is 280mm, 300mm or 320mm which, which sets hydraulic support and the cylinder diameter of the column of the right-hand offset hydraulic support,.
5. eccentrically arranged type hydraulic support combination in unilateral side according to claim 1 or 2, it is characterised in that: the left offset hydraulic
The pedestal of bracket and the right-hand offset hydraulic support be the 1.5 meters of pedestals of center away from hydraulic support, the left avertence set hydraulic support and
The top structure of the right-hand offset hydraulic support is the 1.75 meters of top structures of center away from hydraulic support, the pillar of the top structure
Nest position is corresponding with the needling position of the pedestal, which sets hydraulic support and the cylinder diameter of the column of the right-hand offset hydraulic support is
280mm, 300mm or 320mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062662.6A CN108979695B (en) | 2018-09-12 | 2018-09-12 | Unilateral offset type hydraulic support combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062662.6A CN108979695B (en) | 2018-09-12 | 2018-09-12 | Unilateral offset type hydraulic support combination |
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| Publication Number | Publication Date |
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| CN108979695A true CN108979695A (en) | 2018-12-11 |
| CN108979695B CN108979695B (en) | 2020-09-15 |
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ID=64545834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811062662.6A Active CN108979695B (en) | 2018-09-12 | 2018-09-12 | Unilateral offset type hydraulic support combination |
Country Status (1)
| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3021548A1 (en) * | 1980-06-07 | 1982-03-25 | Ruhrkohle Ag, 4300 Essen | Mine-working roof shield support unit - has independently supportable detachable carrier integrated into cap along roof |
| GB2097454A (en) * | 1981-04-25 | 1982-11-03 | Dowty Mining Equipment Ltd | Mine roof support |
| CN201221369Y (en) * | 2007-12-15 | 2009-04-15 | 内蒙古伊泰集团有限公司 | Left and right pillar mining recovery specific hydraulic support |
| CN101519973A (en) * | 2008-02-25 | 2009-09-02 | 张学进 | Hydraulic bracket with interconnected top and bottom |
| CN102108875A (en) * | 2011-01-26 | 2011-06-29 | 郑州煤矿机械集团股份有限公司 | Single-stage side protective device applicable to high working surface transition support in mechanized mining and deep mining of coal |
| CN104234733A (en) * | 2014-07-04 | 2014-12-24 | 四川省华蓥山煤业股份有限公司李子垭南煤矿 | Overlook inclined fully mechanized coal mining face supporting method and shield support frame |
| CN105484783A (en) * | 2015-12-04 | 2016-04-13 | 西安科技大学 | Parallelogram hydraulic support suitable for large-dip-angle coal-seam long-wall false dipping working face |
| CN107780957A (en) * | 2017-10-17 | 2018-03-09 | 中国矿业大学 | A kind of Quick mechanical gob side entry retaining mounting system and application method |
-
2018
- 2018-09-12 CN CN201811062662.6A patent/CN108979695B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3021548A1 (en) * | 1980-06-07 | 1982-03-25 | Ruhrkohle Ag, 4300 Essen | Mine-working roof shield support unit - has independently supportable detachable carrier integrated into cap along roof |
| GB2097454A (en) * | 1981-04-25 | 1982-11-03 | Dowty Mining Equipment Ltd | Mine roof support |
| CN201221369Y (en) * | 2007-12-15 | 2009-04-15 | 内蒙古伊泰集团有限公司 | Left and right pillar mining recovery specific hydraulic support |
| CN101519973A (en) * | 2008-02-25 | 2009-09-02 | 张学进 | Hydraulic bracket with interconnected top and bottom |
| CN102108875A (en) * | 2011-01-26 | 2011-06-29 | 郑州煤矿机械集团股份有限公司 | Single-stage side protective device applicable to high working surface transition support in mechanized mining and deep mining of coal |
| CN104234733A (en) * | 2014-07-04 | 2014-12-24 | 四川省华蓥山煤业股份有限公司李子垭南煤矿 | Overlook inclined fully mechanized coal mining face supporting method and shield support frame |
| CN105484783A (en) * | 2015-12-04 | 2016-04-13 | 西安科技大学 | Parallelogram hydraulic support suitable for large-dip-angle coal-seam long-wall false dipping working face |
| CN107780957A (en) * | 2017-10-17 | 2018-03-09 | 中国矿业大学 | A kind of Quick mechanical gob side entry retaining mounting system and application method |
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| CN108979695B (en) | 2020-09-15 |
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