CN203717005U - Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face - Google Patents
Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face Download PDFInfo
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- CN203717005U CN203717005U CN201420052889.3U CN201420052889U CN203717005U CN 203717005 U CN203717005 U CN 203717005U CN 201420052889 U CN201420052889 U CN 201420052889U CN 203717005 U CN203717005 U CN 203717005U
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- 238000005065 mining Methods 0.000 title claims abstract description 20
- 239000003245 coal Substances 0.000 title abstract description 5
- 230000011218 segmentation Effects 0.000 claims description 43
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000000725 suspension Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The utility model discloses a cyclically moving advanced supporting hydraulic bracket for two roadways of a fully mechanized coal mining face. The cyclically moving advanced supporting hydraulic bracket comprises supporting components arranged from the front to the back in sequence, and a pulley component; each supporting component comprises a telescopic girder, two height-adjustable supporting pillars and a sectioned rail, wherein the telescopic girder can expand left and right; the two height-adjustable supporting pillars and the sectioned rail are arranged on the lower side of the telescopic girder; the pulley component comprises a pulley seat and pulleys arranged on the pulley seat and capable of sliding on the sectioned rails; the pulley seat is detachably connected with the telescopic girders; the front sectioned rail and the rear sectioned rail, which are adjacent to each other, are detachably connected; the front telescopic girder and the rear telescopic girder, which are adjacent to each other, are movably connected with a tilting prevention jack. The cyclically moving advanced supporting hydraulic bracket not only ensures the space of an original roadway, but also is free of manual dismantling and carrying; the cyclically moving manner is matched with an external winch or other traction machines to drive, repeated supporting and damaging to an ejection plate are avoided during the moving process, and the cyclically moving advanced supporting hydraulic bracket can be applicable to various relatively severe geological conditions.
Description
Technical field
The utility model belongs to support apparatus in coal mine design and manufacture field, relates in particular to a kind of fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports.
Background technology
According to < < safety regulations in coal mine > > regulation, within the scope of all emergency exits of coal-face and junction, tunnel 20m, must add strong supporting; Fully-mechanized coalface, the head-room within the scope of this must not be lower than 1.8m.Be must take to add in advance strong supporting within the scope of coal-face two crossheading 20m.
Current existing work plane two crossheading advance support modes comprise: (1) hydraulic prop complexed metal articulated roof beam carries out supporting; (2) automatic moving type forepoling hydraulic support.
Traditional coal-face two crossheading advance supports are mainly with hydraulic prop complexed metal articulated roof beam, or double wooden prop adds crossbeam supporting, or hydraulic prop frame plate beam carries out supporting, according to drift section and roof pressure situation, determine supporting parameter, to guarantee the unimpeded of emergency exit.But at special geologic condition with face face when exploitation, the limitation that hydraulic prop coordination hinge back timber carries out advance support shows gradually, mainly contains the following aspects: (1), supporting intensity are low.For the larger coal seam of roof pressure, do not reach supporting intensity, easily cause place, work plane emergency exit to crush, it is many that individual prop bores the end, withdraws difficulty, and particularly the intensive place, top of cutting, work plane rear portion is especially true, both increase labour intensity, be unfavorable for again safety in production.(2), support speed is slow.Because hydraulic prop, articulated roof beam withdraw speed, be difficult to increase substantially, restricted the fltting speed of work plane, be difficult to realize high-yield and high-efficiency.(3), labour intensity is large.Owing to withdrawing individual prop and back timber is frequent, and all adopt manpower, cause working face extraction user of service many, labour intensity is large.(4), cost is high, poor stability.Because roof pressure is large or the reason such as operation, the damage amount of pillar, back timber, post footwear is larger, increases cost payout, and complex procedures, and manual operation is many, and the probability causing the accident is larger.
And the automatic moving type advance support rack of utility model in recent years, it can not avoid the support repeatedly to top board from moving mode for taking a step automatic moving type, and for breaking roof, this support pattern easily causes that the secondary of country rock is loosening, the globality in destruction tunnel.Meanwhile, when the distance of advance support section is long, the circulation fltting speed of this kind of forepoling hydraulic support is excessively slow, can not adapt to the requirement that work plane advances fast.
Utility model content
The purpose of this utility model is to provide a kind of space that had both guaranteed original tunnel, do not need again artificial unloading, carrying, its loopy moving mode is by coordinating outside winch hitching machinery to drive, in moving process, top board is not repeatedly supported, destroyed, can adapt to the fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports of various more severe geological conditionss.
For achieving the above object, the utility model adopts following technical scheme: fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports, comprise protecting assembly and the pulley assembly that set gradually from front to back, described protecting assembly comprises can the flexible extensible canopy in left and right, be located at two height-adjustable support columns of extensible canopy downside and not only can be connected in extensible canopy downside but also can be located at the segmentation track that extend the front and back of extensible canopy upside, described pulley assembly comprises pulley base and is arranged on pulley base and the pulley that can slide on segmentation track, pulley base and extensible canopy are for removably connecting, before and after between adjacent two segmentation tracks for removably connecting, between adjacent two extensible canopies in front and back, be connected with anti-down jack.
Described segmentation track hangs on place by connector and props up downside or the protecting assembly extensible canopy of protecting assembly extensible canopy and by described connector, hang on the downside of pulley assembly, and described connector is wire rope or chain.
Between the adjacent two segmentation tracks in front and back, by track bearing pin, removably connected and made both hinged, track bearing pin is that left and right horizontal is extended.
Described extensible canopy comprises upper beam, left beam and right beam, left beam and right beam are plugged in respectively the arranged on left and right sides of upper beam, upper beam downside is provided with two hydraulic cylinders, and wherein the telescopic end of a hydraulic cylinder stretches out left and the telescopic end that connects left beam, another hydraulic cylinder stretches out to the right and connects right beam.
Two support column tops of described protecting assembly are articulated with the downside of the left beam left end of this protecting assembly and the downside of right beam right-hand member by two support column bearing pins respectively, support column bearing pin is front and back horizontal-extending, the end face of support column is hemisphere face, left beam left end and right beam right-hand member are respectively equipped with hemispheric groove, and the end face of two support columns inserts respectively in left beam left end groove and right beam right-hand member groove.
Described support column is the hydraulic jack vertically arranging.
Adjacent two extensible canopies before and after the forward and backward two ends of anti-down jack connect by two joint couplings respectively, anti-down jack is that extend left and right.
Described each extensible canopy connects one or two segmentation tracks.
Described pulley base connects draw-gear.
Described pulley base is provided with automatic one-way device, and automatic one-way device comprises the spring being arranged on pulley base and the plunger being connected with spring, and on segmentation track, corresponding plunger is provided with plunger hole.
Fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports described in the utility model, it has following beneficial effect:
1. be adapted to the back of various geological conditionss, be adapted to especially breaking roof;
2. can select by the distance of advance support the frame number of a protecting assembly, frame spacing can be according to the design of tunnel actual conditions, to adapt to the requirement of different tunnels, different geological conditions;
Supporting intensity be traditional monomer supporting intensity 4-6 doubly, can effectively delay to crush, guarantee that tunnel goes out open height;
4. two support columns can swing along drift section direction respectively, to adapt to tunnel difference, help up and down height;
5. adopt retractable support post, left and right two flexible extensible canopy structures, after shrinking, overall dimensions is little, facilitates integrated moving, to tunnel strong adaptability;
6. between adjacent two extensible canopies, anti-down jack is set, improves the stability of whole pack support, prevent that support from falling that frame process is favorite outer topples over simultaneously;
7. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports described in the utility model, can realize from moving, and have avoided again the support repeatedly to top board.
8. after connecting successively before and after all segmentation tracks, form circulation hanger rail, between the adjacent two segmentation tracks in front and back, by track bearing pin, removably connect and be hinged, make every two to save between tracks and can along bottom, rotate 5 °, to adapt to tunnel fluctuations.
9. circulation hanger rail adds pulley assembly device and also can assist for laneway material and transport.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the protecting assembly structural representation while being positioned at pulley assembly downside.
The specific embodiment
By the fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports shown in Fig. 1-Fig. 4, comprise the protecting assembly 1 setting gradually from front to back, a pulley assembly 8.Described protecting assembly 1 comprises can the flexible extensible canopy 2 in left and right, be located at two height-adjustable support columns 7 of extensible canopy 2 downsides and not only can be connected in extensible canopy 2 downsides but also can be located at the segmentation track 9 that extend the front and back of extensible canopy 2 upsides, sectional guide rail 9, described extensible canopy 2 comprises upper beam 11, left beam 10 and right beam 12, upper beam 11, left beam 10 and right beam 12 are left and right horizontal and extend, upper beam 11 is a hollow beam, left beam 10 and right beam 12 be a symmetrical left side that is plugged in upper beam 11 respectively, right both sides, it is left beam 10, right beam 12 inserts respectively a left side for upper beam 11, in right output port, upper beam 11 downsides are provided with two hydraulic cylinders, two hydraulic cylinders are left and right horizontal setting, wherein the telescopic end of a hydraulic cylinder stretches out left and connects left beam 10, the telescopic end of another hydraulic cylinder stretches out to the right and connects right beam 12.Hydraulic cylinder can drive left beam 10 or right beam 12 stretch into or stretch out upper beam 11, realizes extensible canopy 2 stretching on left and right directions.
Two support column 7 tops of described protecting assembly 1 are articulated with the downside of left beam 10 left ends of this protecting assembly 1 and the downside of right beam 12 right-hand members by two support column 7 bearing pins respectively, support column 7 bearing pins are front and back horizontal-extending, on support column 7, for interting the jack aperture of support column 7 bearing pins, be slightly larger than the diameter of axle of support column 7 bearing pins on left beam 10 and on right beam 12, the end face of support column 7 is hemisphere face 14, left beam 10 left ends and right beam 12 right-hand members are respectively equipped with the downward hemispheric groove of notch, the end face of two support columns 7 inserts respectively in left beam 10 left end grooves and right beam 12 right-hand member grooves, like this, two support columns 7 that prop up protecting assembly 1 can swing along drift section direction respectively, to adapt to tunnel, change, on support column 7, for interting the jack aperture of support column 7 bearing pins, be slightly larger than the diameter of axle of support column 7 bearing pins on left beam 10 and on right beam 12, can make also swing slightly of support column 7.Described support column 7 is the hydraulic jack vertically arranging.
Described segmentation track 9 hangs on place by connector and props up the downside of extensible canopy 2 or the extensible canopy 2 of protecting assembly 1 of protecting assembly 1 and by described connector, hang on the downside of pulley assembly 8, under normal supporting state, described segmentation track 9 hangs on by connector the downside that protecting assembly 1 extensible canopy 2 is propped up at place, the i iron that segmentation track 9 extends for front and back, the end face of i iron arranges shackle, described connector is chain 4, and chain 4 is round-link chain, chain 4 one end are fixedly connected on the upper beam 11 of a protecting assembly 1, the other end is provided with suspension hook 5, suspension hook 5 hooks on the shackle of segmentation track 9 end faces that prop up protecting assembly 1 in its place, realize thus segmentation track 9 and hang on extensible canopy 2 downsides, more stable for what segmentation track 9 was hung, segmentation track 9 hang on place prop up in the middle of protecting assembly 1 upper beam 11 under, and the chain 4 of connection segment track 9 and extensible canopy 2 can arrange a plurality of, certainly, the utility model is not limited to above-mentioned form, described connector also can be wire rope.The adjacent two segmentation tracks 9 in front and back removably connect by track bearing pin 13, and before and after track bearing pin 13 makes, adjacent two segmentation tracks 9 are hinged, the adjacent two segmentation tracks 9 in front and back are two segmentation tracks 9 on adjacent two protecting assemblies 1 before and after laying respectively at, track bearing pin 13 is left and right horizontal extension, like this, before and after making, between adjacent two joint i iron, can along bottom, rotate 5 °, to adapt to tunnel fluctuations.Certainly, the utility model is not limited to above-mentioned form, each extensible canopy 2 also can connect two segmentation tracks 9 as required, and when an extensible canopy 2 connects two segmentation tracks 9, two segmentation tracks 9 are by symmetrical upside or the downside that is connected in upper beam 11 of connector.Between adjacent two extensible canopies 2 in front and back, be connected with anti-down jack 6, adjacent two extensible canopies 2 in front and back are two extensible canopies 2 on adjacent two protecting assemblies 1 in front and back, the upper beam 11 of adjacent two extensible canopies 2 before and after the forward and backward two ends of anti-down jack 6 connect by two joint couplings 3 respectively.
On a described pulley assembly 8 segmentation track 9 located therein, pulley assembly 8 comprises pulley base 15 and is arranged on pulley base 15 and the pulley 16 that can slide on all segmentation tracks 9, pulley 16 arranges four altogether, four pulleys 16 are symmetrically set between two the left and right sides of segmentation track 9 and can slide along segmentation track 9 front and back, and the wheel shaft of pulley 16 is for vertically the wheel face of extension and pulley 16 and the web in the middle of segmentation track 9 i iron fit.
Described pulley base 15 is and removably connects with each extensible canopy 2, and extensible canopy 2 can be by described connector---chain 4 hangs on pulley base 15 downsides, on pulley base 15, be also provided with torus, when one of them protecting assembly 1 extensible canopy 2 hangs on pulley base 15 downside, only the suspension hook 5 of chain 4 on this extensible canopy 2 need be hooked in to the torus on pulley base 15, at this moment segmentation track 9 is located at the upside of extensible canopy 2.Pulley base 15 connects draw-gear by steel cable 19, draw-gear is winch, when one of them extensible canopy 2 hangs on pulley base 15 below, the extensible canopy 2 that draw-gear connects by steel cable 19 tractive pulley bases 15 and pulley base 15 is along rail moving, certainly, the utility model is not limited to above-mentioned form, and draw-gear also can be other tractors.Described pulley base 15 is provided with automatic one-way device, automatic one-way device comprises the spring 17 being arranged on pulley base 15 and the plunger 18 being connected with spring 17 ends, on segmentation track 9, corresponding plunger 18 is provided with plunger hole 20, when pulley base 15 is not during at tension state, the pressure that plunger 18 is subject to spring 17 stretches in plunger hole 20, stop pulley base 15 to move, when pulley base 15 is subject to tractive, plunger 18 can be pulled out again easily from plunger hole 20.
Fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports described in the utility model, when original state, prop up protecting assembly 1 is arranged in order after in the past, segmentation track 9 hangs on the below of corresponding extensible canopy 2, all segmentation tracks 9 front and back are in turn connected to form circulation hanger rail, and pulley assembly 8 is not connected with extensible canopy 2, when in tunnel, file leader props up protecting assembly 1 and need to move, first operate support column 7 and fall frame, drop to after proper height, remove segmentation track 9---the i iron of file leader's frame bracket component extensible canopy 2 belows, file leader's frame bracket component extensible canopy 2 drops to the below (in this process, anti-down jack 6 stretches out and prevents that support from surprisingly toppling over) of circulation hanger rail, segmentation track 9 i iron that again file leader's frame propped up to adjacent with after-frame the protecting assembly 1 of segmentation track 9 i iron of protecting assembly 1 were communicated with track bearing pin 13 and were connected as a single entity, again form circulation hanger rail, then pulley assembly 8 is moved to the top of this protecting assembly 1 along circulation hanger rail after, be connected with the extensible canopy 2 of this protecting assembly 1.After completing this protecting assembly 1 of dismounting with face being mutually connected of 1 anti-down jack 6 of protecting assembly, then continue revenue and expenditure dagger 7, make file leader after shrinking completely prop up protecting assembly 1 and by chain 4 grades, hang on the bottom of sectional guide rail 9, finally by outside draw-gear---a protecting assembly 1 of winch hauling block assembly 8 and pulley assembly 8 downsides, so can longitudinally every group of forepoling hydraulic support be moved the one end away from stope to tunnel along tunnel, after moving process finishes, above-mentioned steps is implemented in reversion can complete the supporting again in this 1 pair of tunnel of protecting assembly.
When a protecting assembly 1 does not need to move, pulley assembly 8 also can be assisted for material transportation.
Claims (10)
1. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports, it is characterized in that: comprise protecting assembly and the pulley assembly that set gradually from front to back, described protecting assembly comprises can the flexible extensible canopy in left and right, be located at two height-adjustable support columns of extensible canopy downside and not only can be connected in extensible canopy downside but also can be located at the segmentation track that extend the front and back of extensible canopy upside, described pulley assembly comprises pulley base and is arranged on pulley base and the pulley that can slide on segmentation track, pulley base and extensible canopy are for removably connecting, before and after between adjacent two segmentation tracks for removably connecting, between adjacent two extensible canopies in front and back, be connected with anti-down jack.
2. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, it is characterized in that: described segmentation track hangs on place by connector and props up downside or the protecting assembly extensible canopy of protecting assembly extensible canopy and by described connector, hang on the downside of pulley assembly, and described connector is wire rope or chain.
3. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, is characterized in that: between the adjacent two segmentation tracks in front and back, by track bearing pin, removably connected and made both hinged, track bearing pin is that left and right horizontal is extended.
4. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, it is characterized in that: described extensible canopy comprises upper beam, left beam and right beam, left beam and right beam are plugged in respectively the arranged on left and right sides of upper beam, upper beam downside is provided with two hydraulic cylinders, and wherein the telescopic end of a hydraulic cylinder stretches out left and the telescopic end that connects left beam, another hydraulic cylinder stretches out to the right and connects right beam.
5. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 4, it is characterized in that: two support column tops of described protecting assembly are articulated with the downside of the left beam left end of this protecting assembly and the downside of right beam right-hand member by two support column bearing pins respectively, support column bearing pin is front and back horizontal-extending, the end face of support column is hemisphere face, left beam left end and right beam right-hand member are respectively equipped with hemispheric groove, and the end face of two support columns inserts respectively in left beam left end groove and right beam right-hand member groove.
6. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 5, is characterized in that: the hydraulic jack of described support column for vertically arranging.
7. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, is characterized in that: adjacent two extensible canopies before and after the forward and backward two ends of anti-down jack connect by two joint couplings respectively, anti-down jack is that extend left and right.
8. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, is characterized in that: described each extensible canopy connects one or two segmentation tracks.
9. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, is characterized in that: described pulley base connects draw-gear.
10. fully-mechanized mining working two lane circulation mobile forepoling hydraulic supports as claimed in claim 1, it is characterized in that: described pulley base is provided with automatic one-way device, automatic one-way device comprises the spring being arranged on pulley base and the plunger being connected with spring, and on segmentation track, corresponding plunger is provided with plunger hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420052889.3U CN203717005U (en) | 2014-01-27 | 2014-01-27 | Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420052889.3U CN203717005U (en) | 2014-01-27 | 2014-01-27 | Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face |
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| Publication Number | Publication Date |
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| CN203717005U true CN203717005U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420052889.3U Expired - Lifetime CN203717005U (en) | 2014-01-27 | 2014-01-27 | Cyclically moving advanced supporting hydraulic bracket for two roadways of fully mechanized coal mining face |
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| CN (1) | CN203717005U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500117A (en) * | 2014-12-10 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Repeated-support-free continuous support forepoling hydraulic support frame |
| CN107524466A (en) * | 2017-09-30 | 2017-12-29 | 辽宁鑫丰矿业（集团）有限公司 | Advance support system |
| CN108506034A (en) * | 2018-03-20 | 2018-09-07 | 郑州合新科技有限公司 | Circulatory self-moving formula lame advanced supporting hydraulic support |
| CN109882229A (en) * | 2019-04-15 | 2019-06-14 | 辽宁鑫丰矿业（集团）有限公司 | A kind of fully-mechanized mining working withdraws sector support devices and support system |
| CN112282803A (en) * | 2020-10-09 | 2021-01-29 | 山东塔高矿业机械装备制造有限公司 | Supporting device and method for fully mechanized coal mining face transportation crossheading and application of supporting device and method |
| CN113153382A (en) * | 2021-03-13 | 2021-07-23 | 广东中裕水电建设工程有限公司 | Hydraulic tunnel pipeline installation trolley, installation system and installation method |
-
2014
- 2014-01-27 CN CN201420052889.3U patent/CN203717005U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500117A (en) * | 2014-12-10 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Repeated-support-free continuous support forepoling hydraulic support frame |
| CN107524466A (en) * | 2017-09-30 | 2017-12-29 | 辽宁鑫丰矿业（集团）有限公司 | Advance support system |
| CN107524466B (en) * | 2017-09-30 | 2024-03-29 | 辽宁鑫丰矿业（集团）有限公司 | Advanced support system |
| CN108506034A (en) * | 2018-03-20 | 2018-09-07 | 郑州合新科技有限公司 | Circulatory self-moving formula lame advanced supporting hydraulic support |
| CN109882229A (en) * | 2019-04-15 | 2019-06-14 | 辽宁鑫丰矿业（集团）有限公司 | A kind of fully-mechanized mining working withdraws sector support devices and support system |
| CN109882229B (en) * | 2019-04-15 | 2024-02-27 | 辽宁鑫丰矿业（集团）有限公司 | Fully-mechanized coal mining face retraction sector supporting device and supporting system |
| CN112282803A (en) * | 2020-10-09 | 2021-01-29 | 山东塔高矿业机械装备制造有限公司 | Supporting device and method for fully mechanized coal mining face transportation crossheading and application of supporting device and method |
| CN112282803B (en) * | 2020-10-09 | 2022-11-22 | 山东塔高矿业机械装备制造有限公司 | Supporting device and method for fully mechanized coal mining face transportation crossheading and application of supporting device and method |
| CN113153382A (en) * | 2021-03-13 | 2021-07-23 | 广东中裕水电建设工程有限公司 | Hydraulic tunnel pipeline installation trolley, installation system and installation method |
| CN113153382B (en) * | 2021-03-13 | 2022-08-02 | 广东中裕水电建设工程有限公司 | Hydraulic tunnel pipeline installation trolley, installation system and installation method |
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Granted publication date: 20140716 |