CN104675422A - Mine roadway excavation working face temporary support hydraulic device - Google Patents
Mine roadway excavation working face temporary support hydraulic device Download PDFInfo
- Publication number
- CN104675422A CN104675422A CN201410824786.9A CN201410824786A CN104675422A CN 104675422 A CN104675422 A CN 104675422A CN 201410824786 A CN201410824786 A CN 201410824786A CN 104675422 A CN104675422 A CN 104675422A
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- Prior art keywords
- hydraulic
- falsework
- support
- jack
- head
- Prior art date
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Links
- 238000009412 basement excavation Methods 0.000 title abstract description 5
- 239000011435 rock Substances 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005422 blasting Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 muck Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000005641 tunneling Effects 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
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a mine roadway excavation working face temporary support hydraulic device comprising a hydraulic combined support, four graded telescopic jacks, a head temporary support and a tail temporary support. The hydraulic combined support comprises four sets of hydraulic supports composed of top beams, lifting jacks and longitudinal-moving jacks; the graded telescopic jacks are installed on the upper portions of the top beams of the hydraulic combined support; the tail temporary support supporting range serves as the roadway supporting operation space, the head temporary support provides the operation space for muck loading, rock drilling and one-step supporting, and the hydraulic combined support is used for implementing the entire moving of a roadway excavation temporary supporting system; each temporary support comprises a top beam and two hydraulic jacks, the top beams of the temporary supports are fixed to the graded telescopic jacks, the two hydraulic jacks are suspended freely to serve as support legs, and the top beams and the hydraulic jacks are connected through pins. The roadway construction empty roof operation is avoided, surrounding rock can be supported timely, and roadway excavation and supporting parallel operation is implemented.
Description
Technical field
The present invention relates to a kind of hydraulic means for roadway head temporary lining.
Background technology
Coal mine roadway tunneling construction mainly adopts drilling and blasting method and comprehensive mechanization method two kinds, current coal mine roadway temporary support for drivage face majority adopts the advanced temporary lining of metal forestope, forestope use is not less than 15kg track or diameter is not less than 2.5 cun of steel pipe manufacturings, and length is not less than 5 meters; The intensity of suspension ring, hanging beam device will match with the intensity of forestope; The anchor pole of upper lift ring must leave enough screw threads, to ensure the firm of suspension ring; Forestope must not be greater than 0.3m to the end face distance of meeting head on, and moves forward in time with construction.This temporary lining Problems existing has personnel to enter empty top zone operation, and labour intensity is large, the shortcomings such as poor stability.
Patent (CN 102865089 A) discloses the advanced falsework of a kind of all-hydraulic automatic moving type and using method thereof, hydraulic support stand principle is introduced the temporary lining of roadway head, but have the following disadvantages: the falsework base 8 of 1. this invention affects mechanical rake muck stone, usual employing mechanical rake dress fractured rock, the scraper bowl of falsework base by obstruction muck machinery of this invention or the operation of cake bucket; 2. roadway head working space is narrow and small, be not suitable for the hydraulic support adopting this type, the equipment of roadway head has hammer drill, dirt loader, elevating conveyor, mine car or belt conveyor etc. form production line, there are hammer drill and dirt loader in excavation operation space, and the falsework of this invention will affect dirt loader work, cause working space narrower and small simultaneously.
Patent (CN 103397888 A) discloses a kind of frame mounting for boring head falsework lifting migration and method of operating, this patent adopts hydraulic pressure from moving system, realizing the carrier trolley that falsework moves forward and backward and the support lifting accessory system realizing falsework lifting, but have the following disadvantages: 1. the head end of this patent does not have supporting to back, and the supporting of head section to back needs manually to install back timber; 2. head section can not near driving face crag, and owing to having a large amount of fractured rock to be unfavorable in roadway head accumulation, the carrier trolley of this patent is near driving face crag.
In order to overcome the deficiency of current coal mine roadway temporary support for drivage face technique and the existence of existing patent, ensure the safe and efficient and mechanization of roadway head temporary lining, patent applicant proposes a kind of hydraulic means of coal mine roadway temporary support for drivage face simultaneously.
Summary of the invention
In order to overcome the deficiency existing for existing roadway head temporary lining and existing patented technology, the invention reside in the hydraulic means that a kind of coal mine roadway temporary support for drivage face is provided, solve roadway head temporary lining and realize mechanization safely and efficiently.
For achieving the above object, technical scheme of the present invention is:
The hydraulic means of coal mine roadway temporary support for drivage face, comprise Combined hydraulic support, the scalable hydraulic jack of classification, meet head on falsework and afterbody falsework composition;
Combined hydraulic support is made up of four hydraulic supports, and each hydraulic support is made up of back timber, lifting jack, movable jack respectively, and the first two hydraulic support is one group, and 2 classification telescopic jack are installed on its back timber top; Latter two hydraulic support is one group, 2 classification telescopic jack are installed on its back timber top, classification telescopic jack realizes meeting head on and afterbody falsework flexible, afterbody falsework supporting scope as roadway support working space, the working space of falsework as muck, rock drilling and once supporting of meeting head on;
Two groups of Combined hydraulic supports realize moving integrally of tunnelling temporary support system device by the movable jack between sectional shelf-unit;
Meet head on to be made up of back timber and two hydraulic jack with afterbody falsework, falsework back timber is fixed on each classification telescopic jack; Two hydraulic jack are freely dangled as support canopy leg, adopt pin joint between back timber and hydraulic jack.
Advantageous Effects of the present invention is: the immediate support that can realize rock drilling working space, and after broken rock, classification telescopic jack of meeting head on is stretched out forward, and falsework hydraulic jack (falsework canopy leg) is stretched out downwards, sets up falsework of meeting head on; Moving integrally of falsework, two groups of Combined hydraulic supports realize moving integrally of tunnelling temporary support system device by the movable jack between sectional shelf-unit, alleviate the labour intensity of workman; Permanent support and driving parallel operations, reduce the mutual interference between two operations, improve drivage efficiency; The hydraulic means of roadway head temporary lining is all arrange along lane side, improves enough working spaces can to muck equipment, rock drilling equipment and transporter; Improve the safety of driving rock drilling and supporting, overcome empty top shop problem, safe and reliable.
Accompanying drawing explanation
The hydraulic means afterbody falsework of Fig. 1 temporary lining shrinks rear schematic diagram
Fig. 2 temporary lining hydraulic means meet head on falsework shrink after schematic diagram
The hydraulic means of Fig. 3 temporary lining is met head on and schematic diagram stretched out by afterbody falsework
The hydraulic means of Fig. 4 temporary lining is met head on and afterbody falsework shrinks schematic top plan view
The hydraulic means of Fig. 5 temporary lining is met head on and afterbody falsework is stretched out and fully-mechanized digging machine relation schematic side view
The hydraulic means of Fig. 6 temporary lining is met head on and afterbody falsework is stretched out and fully-mechanized digging machine relation schematic top plan view
It is schematic side view that the hydraulic means of Fig. 7 temporary lining meets head on to stretch out with harrowing cash office with afterbody falsework
Fig. 8 meets head on and afterbody falsework schematic diagram
Fig. 9 meets head on classification telescopic jack schematic diagram
Figure 10 afterbody classification telescopic jack schematic diagram
In figure: 2-afterbody falsework 3-Combined hydraulic support 4-afterbody classification telescopic jack 5-Combined hydraulic support 6-top, 1-tunnel moves forward and backward jack 7-Combined hydraulic support 8-Combined hydraulic support 9-classification telescopic jack 10-falsework 11-bottom of meeting head on of meeting head on and moves forward and backward jack 12-clapboard 13-fully-mechanized digging machine 14-and harrow cash machine
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
The hydraulic means of roadway head temporary lining, by Combined hydraulic support (3,5,7,8), classification telescopic jack (4,9), falsework of meeting head on (10), afterbody falsework (2) forms; Combined hydraulic support (3,5,7,8) forms 4 groups of hydraulic supports by back timber, lifting jack, movable jack respectively; Combined hydraulic support (3,5,7,8) realizes moving integrally of tunnelling temporary support system; On the back timber top of Combined hydraulic support (3,5,7,8), 4 classification telescopic jack (4,9) are installed, realization is met head on the flexible of falsework (10) and afterbody falsework (2), afterbody falsework (2) supporting scope is as roadway support working space, and falsework of meeting head on (10) is as the working space of muck, rock drilling and once supporting; Falsework (2,10) is made up of back timber (2-1) and two hydraulic jack (2-3), falsework back timber (2-1) is fixed on each classification telescopic jack (4,9), two hydraulic jack (2-3) are freely dangled as support canopy leg, adopt pin joint between back timber (2-1) and hydraulic jack (2-3).
(1) drill eye blasting sends out construction tunnel operating procedure
Step one: time drilling and blasting method digging laneway (1), first tunnels forward system and device and the muck equipment that 20-30m has enough space mounting temporary support for drivage faces by tunnel (1);
Step 2: the transport of dirt loader, conveyance and haulage device is put in place, and Installation and Debugging guarantee normally to work;
Step 3: hydraulic support (3,5,7,8) assembly and accessory, classification telescopic jack (4,9), falsework of meeting head on (10) assembly and accessory, afterbody falsework (2) assembly and accessory, hydraulic pump and console are transported to driving face position;
Step 4: assembling hydraulic support (3,5,7,8), with movable jack (6-1,6-2,6-3,11-1,11-2,11-3), four hydraulic supports (3,5,7,8) are joined together to form entirety, wherein with the hydraulic support (8) of side direction clapboard (12) near driving face, check Combined hydraulic support (3,5,7,8) and dirt loader (13,14), whether safe clearance between conveyance, haulage device etc. meet " safety regulations in coal mine " requirement;
Step 5: install classification telescopic jack (4,9) at the back timber of Combined hydraulic support (3,5,7,8), near installation 3 grades of telescopic jack (9) in direction of meeting head on, at afterbody, 6 grades of telescopic jack (4) are installed;
Step 6: the back timber (2-1) installing falsework in the different telescopic sections of classification telescopic jack (4,9), and with latch rigid bar (2-1), two hydraulic jack (2-3) are installed in back timber (2-1) bottom of falsework, adopt pin joint between back timber (2-1) and hydraulic jack (2-3);
Step 7: Combined hydraulic support (3,5,7,8) is risen, support tunnel (1) top board, meet head on falsework (10) and afterbody falsework (2) is in overhang, before explosion, the pendency jack of falsework (10) is stretched out and support to base plate, make falsework (10) have certain support force, prevent explosion to collapse falsework (10);
Step 8: driving face breaks after rock terminates, the pendency jack of falsework (10) shrinks (2-3), classification telescopic jack of meeting head on (9) extending forwards is to distance crag 20cm, meet head on falsework (10) bottom pendency two hydraulic jack (2-3) stretch out, temporary lining is formed to tunnel (1) top board, the operations such as cleaning float stone, muck, rock drilling and once supporting can be realized under falsework of meeting head on (10) protection;
Step 9: the broken rock of second time terminates, rear two hydraulic supports (3,5) support tunnel (1) top board as support stress point, the pendency hydraulic jack (2-3) of falsework (10) is shunk, front two hydraulic supports (7,8) are reduced, classification telescopic jack of meeting head on (9) and falsework of meeting head on (10) all reduce, and rear two Combined hydraulic supports (3,5) are mobile with front two the Combined hydraulic supports (7,8) of jack (6-1,6-2,6-3,11-1,11-2,11-3) pushing tow between frame; Front two Combined hydraulic supports (7,8) are risen, support tunnel (1) top board, formed and support stress point, rear two Combined hydraulic supports (3,5) are reduced, drag rear two Combined hydraulic supports (3,5) with jack between frame (6-1,6-2,6-3,11-1,11-2,11-3), rise rear two Combined hydraulic supports (3,5) subsequently;
Step 10: when after after two Combined hydraulic supports (3,5) move into place, afterbody classification telescopic jack (4) trails, afterbody falsework (2) pendency hydraulic jack (2-3) stretches out, temporary lining is formed to tunnel (1) top board, under afterbody falsework (2) protection, realizes secondary supporting;
Step 11: when entering next circulation time, repeats step 8 to ten.
(2) comprehensive mechanization method digging laneway operating procedure
Step one: during comprehensive mechanization method digging laneway (1), first drilling and blasting method construction tunnel (1) 40-50m is forward adopted, to have system and device and the comprehensive mechanized development machine (13) of enough space mounting temporary support for drivage faces;
Step 2: comprehensive mechanized development machine (13), elevating conveyor, belt haulage are put in place, and Installation and Debugging guarantee normally to work;
Step 3: hydraulic support (3,5,7,8) assembly and accessory, classification telescopic jack (4,9), falsework of meeting head on (10) assembly and accessory, afterbody falsework (2) assembly and accessory, hydraulic pump and console are transported to driving face position;
Step 4: assembling hydraulic support (3,5,7,8), with movable jack (6-1,6-2,6-3,11-1,11-2,11-3), four hydraulic supports (3,5,7,8) are joined together to form entirety, wherein with the close driving face of hydraulic support (8) of clapboard (12), check whether Combined hydraulic support (3,5,7,8) and the safe clearance between comprehensive mechanized development machine (13), conveyance, haulage device etc. meet " safety regulations in coal mine " requirement;
Step 5: install classification telescopic jack (4,9) at the back timber of Combined hydraulic support (3,5,7,8), near installation 3 grades of telescopic jack (9) in direction of meeting head on, at afterbody, 6 grades of telescopic jack (4) are installed;
Step 6: the back timber (2-1) installing falsework in the different telescopic sections of classification telescopic jack (4,9), and with latch rigid bar (2-1), two hydraulic jack (2-3) are installed in back timber (2-1) bottom of falsework, adopt pin joint between back timber (2-1) and hydraulic jack (2-3);
Step 7: Combined hydraulic support (3,5,7,8) is risen, support tunnel (1) top board, falsework of meeting head on (10) and afterbody falsework (2) are in overhang;
Step 8: comprehensive mechanized development machine (13) cuts head and breaks rock, classification telescopic jack of meeting head on (9), extending forwards is to distance crag 20cm, meet head on falsework (10) bottom pendency two hydraulic jack (2-3) stretch out, temporary lining is formed to tunnel (1) top board, muck, rock drilling and once supporting can be realized under falsework of meeting head on (10) protection;
Step 9: moving integrally of the hydraulic means of roadway head temporary lining, rear two hydraulic supports (3, 5) tunnel (1) top board is supported as support stress point, meet head on falsework (10) pendency hydraulic jack (2-3) shrink, front two hydraulic supports (7, 8) reduce, classification telescopic jack of meeting head on (9) and falsework (10) all reduce, rear two Combined hydraulic supports (3, 5) jack (6-1 between use frame, 6-2, 6-3, 11-1, 11-2, 11-3) front two the Combined hydraulic supports (7 of pushing tow, 8) mobile, front two Combined hydraulic supports (7,8) are risen, support tunnel (1) top board, formed and support stress point, rear two Combined hydraulic supports (3,5) are reduced, drag rear two Combined hydraulic supports (3,5) with jack between frame (6-1,6-2,6-3,11-1,11-2,11-3), rise rear two Combined hydraulic supports (3,5) subsequently,
Step 10: after Combined hydraulic support (3,5) moves into place, afterbody classification telescopic jack (4) trails, afterbody falsework (2) pendency hydraulic jack (2-3) stretches out, temporary lining is formed to tunnel (1) top board, under afterbody falsework (2) protection, realizes secondary supporting;
Step 11: when entering next circulation time, repeats step 8 to ten.
The above; be only the specific embodiment of the present invention; but the protection domain of invention is not limited thereto; any engineers and technicians being familiar with the art are in technical scope of the present invention; some conversion can be done; as the combination of rack form, hydraulic support, the lifting of Combined hydraulic support and move mode and supporting structure etc., all should as infringement protection scope of the present invention.Therefore protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. the hydraulic means of roadway head temporary lining, by Combined hydraulic support, classification telescopic jack, falsework of meeting head on, afterbody falsework forms, and it is characterized in that:
1. Combined hydraulic support forms 4 groups of hydraulic supports by back timber, lifting jack, movable jack respectively;
2. the first two hydraulic support is one group, and latter two hydraulic support is one group, and two groups of Combined hydraulic supports realize moving integrally of tunnelling temporary support system;
3. install 4 classification telescopic jack on the back timber top of Combined hydraulic support, 2 classification telescopic jack are installed on the back timber top of the first two hydraulic support; 2 classification telescopic jack are installed on the back timber top of latter two hydraulic support, realize meeting head on and afterbody falsework flexible, afterbody falsework supporting scope as roadway support working space, the working space of falsework as muck, rock drilling and once supporting of meeting head on;
4. falsework is made up of back timber and two hydraulic jack, falsework back timber is fixed on the column of each classification telescopic jack, two hydraulic jack are freely dangled as support canopy leg, adopt pin joint between back timber and hydraulic jack (falsework canopy leg).
2. the method for operating of the hydraulic means of roadway head temporary lining according to claim 1, is characterized in that:
Step one: hydraulic support assembly and accessory, classification telescopic jack, meet head on falsework assembly and accessory, afterbody falsework assembly and accessory, hydraulic pump and console are transported to driving face position;
Step 2: four hydraulic supports are joined together to form entirety with movable jack by assembling hydraulic support, wherein with the hydraulic support of clapboard near driving face;
Step 3: install classification telescopic jack at the back timber of Combined hydraulic support, near installation 3 grades of telescopic jack in direction of meeting head on, install 6 grades of telescopic jack at afterbody;
Step 4: the back timber installing falsework in the different telescopic sections of classification telescopic jack, and use latch rigid bar, two hydraulic jack are installed as support canopy leg in the back timber bottom of falsework, adopt pin joint between back timber and hydraulic jack (falsework canopy leg);
Step 5: risen by Combined hydraulic support, supports back, meets head on to be in overhang with the falsework of afterbody;
Step 6: driving face breaks after rock terminates, to meet head on classification telescopic jack, extending forwards is to distance crag 20cm, meet head on falsework bottom pendency two hydraulic jack stretch out, temporary lining is formed to back, can meet head on to realize muck, rock drilling and once supporting under falsework protection;
Step 7: the broken rock of second time terminates, rear two Combined hydraulic stent support backs are as support stress point, the pendency hydraulic jack of falsework is shunk, front two hydraulic supports reduce, classification telescopic jack of meeting head on and falsework all reduce, rear two Combined hydraulic supports are with after front two the Combined hydraulic support-movings to assigned address of jack pushing tow between two pack supports, front two Combined hydraulic supports rise, support back, formed and support stress point, rear two Combined hydraulic supports reduce, rear two Combined hydraulic supports are dragged with jack between two pack supports, rise rear two Combined hydraulic supports subsequently,
Step 8: after Combined hydraulic support-moving puts in place, afterbody classification telescopic jack trails, afterbody falsework pendency hydraulic jack is stretched out, temporary lining is formed to back, secondary supporting is realized under the protection of afterbody falsework, after roadway surrounding rock secondary supporting terminates, pack up afterbody falsework;
Step 9: when entering next circulation time, repeats step 6 to eight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410824786.9A CN104675422B (en) | 2014-12-26 | 2014-12-26 | The hydraulic means of coal mine roadway temporary support for drivage face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410824786.9A CN104675422B (en) | 2014-12-26 | 2014-12-26 | The hydraulic means of coal mine roadway temporary support for drivage face |
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| Publication Number | Publication Date |
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| CN104675422A true CN104675422A (en) | 2015-06-03 |
| CN104675422B CN104675422B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410824786.9A Expired - Fee Related CN104675422B (en) | 2014-12-26 | 2014-12-26 | The hydraulic means of coal mine roadway temporary support for drivage face |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065048A (en) * | 2015-08-23 | 2015-11-18 | 河南理工大学 | Temporary support for driving working face under coal mine |
| CN105370308A (en) * | 2015-09-24 | 2016-03-02 | 北京天地玛珂电液控制系统有限公司 | Gob-side entry retaining hydraulic support system |
| CN107191208A (en) * | 2017-06-26 | 2017-09-22 | 永城煤电控股集团有限公司 | Rigid protection body Support Method in flexible support Ti Yu lanes by gob side entry retaining lane |
| CN107651559A (en) * | 2017-11-06 | 2018-02-02 | 山东建筑大学 | A kind of hydraulic stepping hanging beam equipment |
| CN110130389A (en) * | 2019-05-24 | 2019-08-16 | 国网山东省电力公司建设公司 | A kind of adjustable GIS device base concrete winter construction roof insulating and adjusting method |
| CN110130964A (en) * | 2019-06-13 | 2019-08-16 | 霍州煤电集团河津腾晖煤业有限责任公司 | A kind of temporary supporting device of driving working face and construction method |
| CN110159333A (en) * | 2019-06-13 | 2019-08-23 | 河南理工大学 | A kind of quick advance support unit of comprehensive mechanized driving and application method |
| CN110219689A (en) * | 2019-06-13 | 2019-09-10 | 霍州煤电集团河津腾晖煤业有限责任公司 | A kind of underground driving face provisional protection bracket and its construction method |
| CN112922648A (en) * | 2021-04-07 | 2021-06-08 | 中国矿业大学 | Rail mounted hydraulic pressure sectional shelf-unit |
| CN113882888A (en) * | 2021-11-01 | 2022-01-04 | 安徽理工大学 | Double-door efficient and rapid circulating self-moving anchor support integrated equipment and control method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065048A (en) * | 2015-08-23 | 2015-11-18 | 河南理工大学 | Temporary support for driving working face under coal mine |
| CN105370308A (en) * | 2015-09-24 | 2016-03-02 | 北京天地玛珂电液控制系统有限公司 | Gob-side entry retaining hydraulic support system |
| CN105370308B (en) * | 2015-09-24 | 2018-03-09 | 北京天地玛珂电液控制系统有限公司 | Along lane hydraulic support stand system of leaving blank |
| CN107191208A (en) * | 2017-06-26 | 2017-09-22 | 永城煤电控股集团有限公司 | Rigid protection body Support Method in flexible support Ti Yu lanes by gob side entry retaining lane |
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