CN101463729A - Hydraulic support for large-mining height caving coal - Google Patents

Hydraulic support for large-mining height caving coal Download PDF

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Publication number
CN101463729A
CN101463729A CNA200910077115XA CN200910077115A CN101463729A CN 101463729 A CN101463729 A CN 101463729A CN A200910077115X A CNA200910077115X A CN A200910077115XA CN 200910077115 A CN200910077115 A CN 200910077115A CN 101463729 A CN101463729 A CN 101463729A
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CN
China
Prior art keywords
caving
coal
hinged
jack
tail boom
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Pending
Application number
CNA200910077115XA
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Chinese (zh)
Inventor
王国法
孟二存
刘新华
宁桂峰
苏林军
张银亮
李提建
牛艳奇
刘俊峰
王彪谋
杜忠孝
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Tiandi Science and Technology Co Ltd
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Tiandi Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tiandi Science and Technology Co Ltd filed Critical Tiandi Science and Technology Co Ltd
Priority to CNA200910077115XA priority Critical patent/CN101463729A/en
Publication of CN101463729A publication Critical patent/CN101463729A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a large mining height top coal caving hydraulic support and relates to the technical field of colliery coal mining supporting equipment and support equipment for large mining height top coal caving working face. The support comprises a pillar, a top beam and a base that the two ends thereof are articulated respectively, a front beam that is articulated to the front end of the top beam, a telescopic beam in the front beam, a side wall protection mechanism that is articulated with the telescopic beam, a shield beam that is articulated with the rear end of the top beam, a caving mechanism that is arranged at the rear the shield beam, a connecting-rod mechanism that is articulated between the rear of the base and the rear of the shield beam and four pillars which are articulated between the base and the top beam and can lead the maximum of the height of the support to be 4.0-5.2 meters, wherein the connecting-rod mechanism is provided with two front connecting rods and two rear connecting rods and has good stability, and a pedestrian passageway is formed between the two front connecting rods and the two rear connecting rods. The support has the characteristics of a top coal caving hydraulic support and a large mining hydraulic support, thus beneficial for safely and efficiently caving thick and super-thick coal seams, rationalizing the caving ratio, and ensuring gas dilution near a working face coal caving mouth.

Description

Hydraulic support for large-mining height caving coal
Technical field
The present invention relates to coal mining support apparatus technical field, belong to a kind of support apparatus that is used for large-mining height caving coal exploitation work plane.
Background technology
Caving roof coal hydraulic support is the critical equipment of top coal caving method, and the innovation of caving roof coal hydraulic support frame type and development are the innovation of top coal caving method and technology and important condition of development and sign.At present, the sublevel caving hydrau lic support maximum height is generally in 3.5 meters, along with coal mine machinery melts the quickening of adopting paces and the variation of geological conditions, the performance of these supports can not satisfy requirement thick and the super high seam exploitation fully, under suitable condition, the advantage of comprehensive top coal caving and big two kinds of coal-mining methods of mining and high comprehensive mining, adopting big mining height longwall top coal caving is thick and effective new way of super high seam realization high-yield and high-efficiency.
Big mining height longwall top coal caving, i.e. working surface coal mining machine coal cutting height is greater than 3.5 meters top coal caving method.Because the coal cutting of large-mining height caving coal work plane highly strengthens, caving coal height reduces relatively, taking and placing are than more reasonable, this not only can increase the face-airing section, reduces the work plane windage, shortens top coal caving time, improve the work plane rate of recovery and per unit area yield, and for ventilating and putting coal and provide than large space, give security near the gas dilution work plane coal discharge outlet, help work plane and realize safe and efficient production; And the increasing of work plane coal cutting height has been created condition for making full use of current high-power coal cutter and conveyer, provides the space for work plane is equipped with high-power rear portion conveyer, and helps collapsing of top coal and fall; And high-power rear portion conveyer be applied as work plane caving coal the time increase coal discharge outlet quantity condition be provided; Simultaneously along with the increase of coal cutting height, also can effectively shorten work plane circulation timei, accelerate face propulsion speed.
The large-mining height caving coal exploitation can solve 12~18m super high seam production technique difficult problem owing to combine the advantage of big mining and high comprehensive mining and top coal caving, helps again realizing coal cutting and putting the coal balanced production.So being the longwall top coal caving work plane, the large-mining height caving coal exploitation realizes producing ten million ton per year, improve the main path of work plane output, be the important channel that following China is thick and super high seam is realized safe high-yield and high-efficiency exploitation, and can hydraulic support for large-mining height caving coal be the key that realize producing per year ten million ton of target.
Common caving roof coal hydraulic support is difficult to adopt two back link forms because of its spatial constraints, mainly be because ordinary stent tail boom jack has taken the installing space of two back links, so common caving roof coal hydraulic support can only adopt single back link form, this structure stand instability, torsional property is poor, the maintenance of support rear portion is inconvenient, and the operator can't grasp the working condition at support rear portion at any time, and labour intensity strengthens.
Summary of the invention
The purpose of this invention is to provide a kind of maximum height and reach 4 meters to 5.2 meters, two-fold advantage with caving roof coal hydraulic support and big mining height hydraulic support, adopt two front rods, two back link stabilizing mechanisms, between two front rods and the hydraulic support for large-mining height caving coal of walkway is set between two back links.
For achieving the above object, the hydraulic support for large-mining height caving coal of the present invention's design, it comprises back timber and the base that column and two ends thereof are hinged respectively, back timber one side is provided with the back timber side guard board, be hinged with thruster mechanism between back timber and the back timber side guard board, be articulated in the front-axle beam of back timber front end, be articulated in the front-axle beam jack between back timber and the front-axle beam, insert the extensible canopy in the front-axle beam, be articulated in extensible canopy and insert the interior supporting plate of front-axle beam gathering sill, extensible canopy jack between front-axle beam and the extensible canopy, the side protecting mechanism hinged with extensible canopy, be articulated in the caving shield of top beam rear end, caving shield one side is provided with the caving shield side guard board, be hinged with thruster mechanism between caving shield and the caving shield side guard board, the caving shield rear portion put coal mechanism, be articulated in the linkage between base rear portion and the caving shield rear portion, be loaded on the thrust gear on the base, foot rest, draw back slide mechanism, wherein, be hinged with between base and the back timber and make the support maximum height reach 4.0 meters to 5.2 meters four root posts, four root posts become two rows to be symmetrical arranged, linkage comprises two front rods, two back links, two front rods are arranged on the rear of two row's columns with released state, two back links are arranged on the corresponding position at the rear of two front rods, between two front rods and between two back links the walkway are set.
Be hinged with thruster mechanism corresponding buffer gear between back timber and the back timber side guard board, be hinged with thruster mechanism corresponding buffer gear between caving shield and the caving shield side guard board, thruster mechanism comprises thruster jack and guide peg, and buffer gear comprises spring, guide peg.
Be provided with in the front center of base and lift end jack.
Side protecting mechanism comprises face guard, stock, quarter butt, wall supporting jack, and an end of wall supporting jack is hinged on the supporting plate rear end, and its other end and stock one end, quarter butt one end are hinged, and the stock other end and extensible canopy are hinged, and quarter butt one end and face guard are hinged.
Put coal mechanism and comprise the tail boom that is hinged on the caving shield rear end, the plate in the tail boom, the plate jack that the push-and-pull plate is flexible is articulated in the tail boom jack between caving shield and the tail boom.
Be hinged with two tail boom jack between caving shield and the tail boom, two tail boom jack symmetries are arranged on hydraulic support for large-mining height caving coal center line both sides, and the tail boom jack is arranged between two back links at the pin joint on the caving shield.
The invention has the beneficial effects as follows: hydraulic support for large-mining height caving coal has the dual characteristics of caving roof coal hydraulic support and big mining height hydraulic support, for thick and super high seam realize that safety and high efficiency provides condition, taking and placing are than more reasonable, adopt two front rods and two back link structure, this structural stability is good, forming the walkway between two front rods and between two back link, can satisfy current demand by this walkway, the maintenance personal can arrive the support rear portion and carry out maintenance activity, again can be by observing the coal situation of putting herein at any time, operating efficiency improves.
Description of drawings
Fig. 1 is a hydraulic support for large-mining height caving coal structural representation of the present invention
Fig. 2 is the base vertical view of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 3 is the base and the front-rear linkage assembling schematic diagram of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 4 is that the K of Fig. 3 is to view
Fig. 5 is two front rod structural representations of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 6 is two back link structural representations of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 7 is the A-A sectional view of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 8 is the B-B sectional view of Fig. 1 hydraulic support for large-mining height caving coal
Fig. 9 is the C-C sectional view of Fig. 1 hydraulic support for large-mining height caving coal
Figure 10 is the D-D sectional view of Fig. 1 hydraulic support for large-mining height caving coal
Figure 11 is the E-E sectional view of Fig. 1 hydraulic support for large-mining height caving coal
Figure 12 be Fig. 1 hydraulic support for large-mining height caving coal the F-F sectional view wherein, 1: side protecting mechanism, 1a: face guard, 1b: stock, 1c: quarter butt, 1d: wall supporting jack, 2: extensible canopy, 3: extensible canopy jack, 4: front-axle beam, 5: supporting plate, 6: front-axle beam jack, 7: back timber, 8: back timber side guard board, 9: a of thruster mechanism, 91: thruster jack a, 92: guide peg a, 10: buffer gear a, 101: spring a, 102: guide peg a ', 11: caving shield, 12: the caving shield side guard board, 13: the b of thruster mechanism, 131: thruster jack b, 132: guide peg b, 14: buffer gear b, 141: spring b, 142: guide peg b ', 15: put coal mechanism, 151: tail boom, 152: plate, 153: tail boom jack, 154: plate jack, 16: column, 17: linkage, 171: front rod, 172: back link, 18: the walkway, 19: base, 20: thrust gear, 201: pass jack, 202: push rod, 21: foot rest, 22: lift end jack, 23: connector, 24: draw back slide mechanism, 241: draw back slide jack, 242: chain
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 4, Fig. 7, Fig. 8, Fig. 9, shown in Figure 10: large-mining height caving coal work plane hydraulic support for large-mining height caving coal, mainly comprise back timber 7 and base 19 that column 16 and two ends thereof are hinged respectively, column 16 makes the maximum height of support reach 4.0 meters to 5.2 meters, column 16 adopts four, four root posts 16 one-tenth two rows be symmetrical arranged, and is passage between the column 16; Back timber 7 one sides are provided with back timber side guard board 8, for sealing and anti-down usefulness between frame, be hinged with the a9 of thruster mechanism between back timber 7 and the back timber side guard board 8, back timber side guard board 8 is hinged by the thruster jack a91 in guide peg a92 and the back timber 7, and is flexible by means of the passing realization of thruster jack a91; Be hinged with corresponding buffer gear a10 between back timber 7 and the back timber side guard board 8 with the a9 of thruster mechanism, buffer gear comprises spring a101, guide peg a ' 102, the end of spring a101 inserts in back timber 7 guide cylinders, its other end contacts with guide peg a ' 102, guide peg a ' 102 is hinged with back timber side guard board 8, be articulated in the front-axle beam 4 of back timber 7 front ends, the front-axle beam jack 6 between hinged and back timber 7 and the front-axle beam 4, front-axle beam 4 swings up and down around pin joint under the push-and-pull of front-axle beam jack 6; Insert the extensible canopy 2 in the front-axle beam 4, be articulated in the supporting plate 5 that extensible canopy 5 inserts in front-axle beam 4 gathering sills, the extensible canopy jack 3 between front-axle beam 4 and the extensible canopy 2, extensible canopy 2 is moving in front-axle beam 4 casings under the push-and-pull of extensible canopy jack 3; The side protecting mechanism 1 hinged with extensible canopy 2, side protecting mechanism 1 comprises the wall supporting jack 1d hinged with extensible canopy 2, stock 1b, the quarter butt 1c hinged with wall supporting jack 1d, the face guard 1a hinged with quarter butt 1c, face guard 1a is at the acting in conjunction lower swing of wall supporting jack 1d, stock 1b, quarter butt 1c; Be articulated in the caving shield 11 of back timber 7 rear ends, caving shield 11 1 sides are provided with caving shield side guard board 12, for sealing and anti-down usefulness between frame, between caving shield 11 and caving shield side guard board 12, be hinged with the b13 of thruster mechanism, with the corresponding buffer gear b14 of the b13 of thruster mechanism, buffer gear b14 comprises spring b141, guide peg b ' 142; Be articulated in the linkage 17 between base 19 rear portions and caving shield 11 rear portions, linkage 17 comprises two front rod 17a, two back link 17b, structural stability is good, two front rod 17a are arranged on the rear of two row's columns 16 with the lateral separation state, two corresponding positions, rear that back link 17b is arranged on two front rod 17a, be provided with walkway 18 between two front rod 17a and between two back link 17b, by this humanoid passage 18, the operator can observe the situation of top coal inbreak easily, with control tail boom 151, the duty of plate 152, the maintenance personal can arrive the support rear portion and carry out maintenance activity; Caving shield 11 rear portions put coal mechanism 15, put coal mechanism 15 and comprise the tail boom 151 that is hinged on caving shield 11 rear ends, plate jack 153 in the tail boom 151 and by the flexible plate 152 of its push-and-pull, the tail boom jack 153 that be articulated between caving shield 11 and the tail boom 151, tail boom 151 is swung up and down put coal; Be hinged with two tail boom jack 153 between caving shield 11 and the tail boom 151, two tail boom jack 153 are symmetricly set on hydraulic support for large-mining height caving coal center line both sides, and tail boom jack 153 is arranged between two back link 17b at the pin joint on the caving shield 11; Be loaded on thrust gear 20, foot rest 21, connector 23 on the base 19, draw the back to slip mechanism 24, thrust gear 20 comprises the passing jack 201 hinged with base 19, the hinged push rod 202 with passing jack 201, the connector 23 hinged with push rod 202, draw the back to slip mechanism 24 and comprise with the hinged back of drawing of base 19 and slip jack 241, slip the hinged chain 242 of jack 241 with drawing the back; Chain 242 is connected with scratch board conveyor, the rear portion transporter is away from bracket base 19 when putting coal, putting coal finishes the back and the back is slipped moves near the base 19 so that tail boom 151, plate 152 can screen, and can seal coal discharge outlet after stretching out plate 152 by drawing the back to slip jack 241; Run into the soft geological conditions of base plate, be provided with in the front center of base 19 and lift end jack 22.
This structure has the dual characteristics of caving roof coal hydraulic support and big mining height hydraulic support, for thick and super high seam realize that safety and high efficiency provides condition, the large-mining height caving coal work plane uses big mining height caving hydraulic support to carry out supporting, its work plane coal cutting highly strengthens, caving coal height reduces relatively, taking and placing are than more reasonable, this not only can increase the face-airing section, reduce the work plane windage, shorten top coal caving time, improve the work plane rate of recovery and per unit area yield, and for ventilating and putting coal and provide than large space, give security near the gas dilution work plane coal discharge outlet, help work plane and realize safe and efficient production; Linkage 17 adopts two front rods 171, two back links 172, this structural stability is good, form walkway 18 between two front rods 171 and between two two back links 172, both can satisfy current demand by this walkway 18, the maintenance personal can arrive the support rear portion and carry out maintenance activity, also can put the coal situation by immediate observation herein, operating efficiency improves.

Claims (9)

1, a kind of hydraulic support for large-mining height caving coal, it comprises back timber and the base that column and two ends thereof are hinged respectively, back timber one side is provided with the back timber side guard board, between back timber and back timber side guard board, be hinged with thruster mechanism, be articulated in the front-axle beam of back timber front end, be articulated in the front-axle beam jack between back timber and the front-axle beam, insert the extensible canopy in the front-axle beam, be articulated in extensible canopy and insert the interior supporting plate of front-axle beam gathering sill, extensible canopy jack between front-axle beam and the extensible canopy, the side protecting mechanism hinged with extensible canopy, be articulated in the caving shield of top beam rear end, caving shield one sidepiece is provided with the caving shield side guard board, between caving shield and caving shield side guard board, be hinged with thruster mechanism, the caving shield rear portion put coal mechanism, be articulated in the linkage between base rear portion and the caving shield rear portion, be loaded on the thrust gear on the base, draw back slide mechanism, it is characterized in that: be hinged with between described base and the described back timber and make the support maximum height reach 4.0 meters to 5.2 meters four root posts, four described columns become two row's symmetric arrangement, described linkage comprises two front rods, two back links, two described front rods are arranged on the rear of two row's columns with released state, two corresponding positions, rear that described back link is arranged on two front rods are provided with the walkway between two described front rods and between two described back links.
2, hydraulic support for large-mining height caving coal according to claim 1, it is characterized in that: be hinged with corresponding buffer gear between described back timber and the back timber side guard board with thruster mechanism, be hinged with thruster mechanism corresponding buffer gear between described caving shield and the caving shield side guard board, described thruster mechanism comprises thruster jack and guide peg, and described buffer gear comprises spring, guide peg.
3, hydraulic support for large-mining height caving coal according to claim 1 and 2 is characterized in that: be provided with in the front center of base and lift end jack setting.
4, hydraulic support for large-mining height caving coal according to claim 1 and 2, it is characterized in that: described side protecting mechanism comprises face guard, stock, quarter butt, wall supporting jack, one end of wall supporting jack is hinged on the supporting plate rear end, its other end and stock one end, quarter butt one end are hinged, the stock other end and extensible canopy are hinged, and quarter butt one end and face guard are hinged.
5, hydraulic support for large-mining height caving coal according to claim 3, it is characterized in that: described side protecting mechanism comprises face guard, stock, quarter butt, wall supporting jack, one end of wall supporting jack is hinged on the supporting plate rear end, its other end and stock one end, quarter butt one end are hinged, the stock other end and extensible canopy are hinged, and quarter butt one end and face guard are hinged.
6, hydraulic support for large-mining height caving coal according to claim 1, it is characterized in that: the described coal mechanism of putting comprises the tail boom that is hinged on the caving shield rear end, plate in the tail boom, the plate jack that the push-and-pull plate is flexible is articulated in the tail boom jack between caving shield and the tail boom.
7, hydraulic support for large-mining height caving coal according to claim 5, it is characterized in that: the described coal mechanism of putting comprises the tail boom that is hinged on the caving shield rear end, plate in the tail boom, the plate jack that the push-and-pull plate is flexible is articulated in the tail boom jack between caving shield and the tail boom.
8, hydraulic support for large-mining height caving coal according to claim 6, it is characterized in that: be hinged with two tail boom jack between described caving shield and the tail boom, two described tail boom jack symmetries are arranged on hydraulic support for large-mining height caving coal center line both sides, and the tail boom jack is arranged between two back links at the pin joint on the caving shield.
9, hydraulic support for large-mining height caving coal according to claim 7, it is characterized in that: be hinged with two tail boom jack between described caving shield and the tail boom, two described tail boom jack symmetries are arranged on hydraulic support for large-mining height caving coal center line both sides, and the tail boom jack is arranged between two back links at the pin joint on the caving shield.
CNA200910077115XA 2009-01-15 2009-01-15 Hydraulic support for large-mining height caving coal Pending CN101463729A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871355A (en) * 2010-06-10 2010-10-27 中煤北京煤矿机械有限责任公司 Four post support shield type large mining height mesh-placement hydraulic support
CN101886547A (en) * 2010-06-10 2010-11-17 中煤北京煤矿机械有限责任公司 Two-pier shielding type large mining height lapping hydraulic bracket
CN102373939A (en) * 2011-10-27 2012-03-14 山西晋煤集团金鼎煤机矿业有限责任公司 Light hydraulic bracket for shortwall face
CN102720499A (en) * 2012-06-29 2012-10-10 中国矿业大学 Fully-mechanized top-coal caving, filling and mining method
CN102926784A (en) * 2012-11-16 2013-02-13 无锡阳工机械制造有限公司 Hydraulic supporting-shielding bracket structure for coal face
CN102926779A (en) * 2012-11-16 2013-02-13 无锡阳工机械制造有限公司 Hydraulic shielding bracket structure for coal face
CN102979544A (en) * 2012-11-16 2013-03-20 无锡阳工机械制造有限公司 Front beam structure of hydraulic support
CN103195459A (en) * 2013-04-24 2013-07-10 江苏蛟龙重工集团有限公司 Low caving coal support
CN103397895A (en) * 2013-08-06 2013-11-20 四川华蓥山广能集团嘉华机械有限责任公司 Pseudo oblique coal face hydraulic support
CN103670460A (en) * 2013-12-04 2014-03-26 郑州煤矿机械集团股份有限公司 Hydraulic sublevel caving coal support base with moving-before-sliding device
CN105604594A (en) * 2014-11-25 2016-05-25 无锡市洗选设备厂 Shield-type support frame for sand washer
CN106014465A (en) * 2016-06-16 2016-10-12 天地科技股份有限公司 Integrated one-way operation self-locking movable side guard plate fixing device
CN102373939B (en) * 2011-10-27 2016-12-14 山西晋煤集团金鼎煤机矿业有限责任公司 Light hydraulic bracket for shortwall face
CN109630164A (en) * 2018-12-04 2019-04-16 安徽省皖北煤电集团有限责任公司 A kind of extensible hydraulic support
CN109856631A (en) * 2019-02-27 2019-06-07 中国矿业大学 Coal method is put in a kind of intelligence based on top coal amounts of thickness variation real-time monitoring
WO2021083038A1 (en) * 2019-10-29 2021-05-06 北京天地玛珂电液控制系统有限公司 Rapid support moving system for aqueous medium hydraulic support

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101886547A (en) * 2010-06-10 2010-11-17 中煤北京煤矿机械有限责任公司 Two-pier shielding type large mining height lapping hydraulic bracket
CN101871355B (en) * 2010-06-10 2013-02-13 中煤北京煤矿机械有限责任公司 Four post support shield type large mining height mesh-placement hydraulic support
CN101871355A (en) * 2010-06-10 2010-10-27 中煤北京煤矿机械有限责任公司 Four post support shield type large mining height mesh-placement hydraulic support
CN102373939B (en) * 2011-10-27 2016-12-14 山西晋煤集团金鼎煤机矿业有限责任公司 Light hydraulic bracket for shortwall face
CN102373939A (en) * 2011-10-27 2012-03-14 山西晋煤集团金鼎煤机矿业有限责任公司 Light hydraulic bracket for shortwall face
CN102720499A (en) * 2012-06-29 2012-10-10 中国矿业大学 Fully-mechanized top-coal caving, filling and mining method
CN102926779A (en) * 2012-11-16 2013-02-13 无锡阳工机械制造有限公司 Hydraulic shielding bracket structure for coal face
CN102979544A (en) * 2012-11-16 2013-03-20 无锡阳工机械制造有限公司 Front beam structure of hydraulic support
CN102926784A (en) * 2012-11-16 2013-02-13 无锡阳工机械制造有限公司 Hydraulic supporting-shielding bracket structure for coal face
CN103195459A (en) * 2013-04-24 2013-07-10 江苏蛟龙重工集团有限公司 Low caving coal support
CN103195459B (en) * 2013-04-24 2016-01-20 江苏蛟龙重工集团有限公司 Low caving coal hydraulic support
CN103397895A (en) * 2013-08-06 2013-11-20 四川华蓥山广能集团嘉华机械有限责任公司 Pseudo oblique coal face hydraulic support
CN103670460B (en) * 2013-12-04 2016-04-27 郑州煤矿机械集团股份有限公司 With the Base of Cover Caving Coal Hydraulic Supports moving rear slip device
CN103670460A (en) * 2013-12-04 2014-03-26 郑州煤矿机械集团股份有限公司 Hydraulic sublevel caving coal support base with moving-before-sliding device
CN105604594A (en) * 2014-11-25 2016-05-25 无锡市洗选设备厂 Shield-type support frame for sand washer
CN106014465A (en) * 2016-06-16 2016-10-12 天地科技股份有限公司 Integrated one-way operation self-locking movable side guard plate fixing device
CN106014465B (en) * 2016-06-16 2018-05-08 天地科技股份有限公司 A kind of self-contained unidirectional manipulation self-locking movable side guard plate fixing device
CN109630164A (en) * 2018-12-04 2019-04-16 安徽省皖北煤电集团有限责任公司 A kind of extensible hydraulic support
CN109630164B (en) * 2018-12-04 2020-06-02 安徽恒源煤电股份有限公司 Extensible hydraulic support
CN109856631A (en) * 2019-02-27 2019-06-07 中国矿业大学 Coal method is put in a kind of intelligence based on top coal amounts of thickness variation real-time monitoring
WO2021083038A1 (en) * 2019-10-29 2021-05-06 北京天地玛珂电液控制系统有限公司 Rapid support moving system for aqueous medium hydraulic support

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