CN104653201B - Hexagonal short arm half-opened support and construction process thereof - Google Patents
Hexagonal short arm half-opened support and construction process thereof Download PDFInfo
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- CN104653201B CN104653201B CN201510069306.7A CN201510069306A CN104653201B CN 104653201 B CN104653201 B CN 104653201B CN 201510069306 A CN201510069306 A CN 201510069306A CN 104653201 B CN104653201 B CN 104653201B
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- 238000000034 method Methods 0.000 title claims abstract description 12
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- 239000003245 coal Substances 0.000 claims abstract description 29
- 230000008093 supporting effect Effects 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
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- 239000011425 bamboo Substances 0.000 claims description 5
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a facility for a coal mine tunnel, particularly to a hexagonal short arm half-opened support and a construction process thereof. A support body consists of a first short arm, a second short arm, a third short arm, a fourth short arm, a fifth short arm and a sixth short arm, which are moveably connected end to end in a hinging way at one time. According to the support process, a semi-sealed support of a hexagonal variable trapezium shed or U-shaped shed is adopted as a closed support; the six sides are linear arm beams; two ends of the support are connected in a hinging way, and during top, bottom and lateral stress, the six sides are changed according to the stressed state to reach a stress balance stable state. The support way is simple in structure, and convenient to be erected and maintained, and can be repeatedly used.
Description
Technical field
The present invention relates to a kind of coal mine roadway facility is and in particular to a kind of hexagon galianconism semi open model supporting and its apply
Work technique.
Background technology
First, the shortcoming that the supporting of I-beam for mine trapezoidal canopy exists：
1st, back timber and leg are long（Typically in more than 2m）, pressurized rear flexible, spoilage is high；Special equipment is needed after bending
Correction, freight volume is big, and cost of transportation is high, and scrappage is high, and repeatable utilization rate is low.
2nd, two legs are facedown pressure-bearing, and not only top pressure to be born, still suffers from side pressure, easily causes bending.
3rd, typically it is to canopy supporting, materials are many, high cost.
4th, because the pressure-bearing surface of two legs is the termination of I-beam for mine, even if wearing boots, 0.2 × 0.2 × 2=0.08m pressed by post boots2, press
Canopy is calculated：0.08×2=0.16 m2, because bearing area is little, pucking speed is fast, head-room it cannot be guaranteed that, maintenance capacity is big.
5th, because pucking speed is fast, head-room it cannot be guaranteed that, ordinary circumstance road maintenance needs to carry joint, on the one hand carries
Joint workload is big, and progress is slow, needs more maintenance troop, and maintenance cost is high；On the other hand, the western three-soft seam in Henan thickness
Thin, repeatedly carry joint and easily cause in a large amount of spoils incorporation coals, reduce ature of coal.
6th, because this supporting beam leg is unsuitable long, so drift section can not meet requirement.
2nd, the shortcoming that U-shaped canopy exists：
Although the 1, U-shaped canopy top is domed, reduce top pressure, because it is highly high（Typically in 3-3.5 m）, increase
Added leg by side pressure height.Although U-shaped hardness of steel is high, because it is highly far above the height of trapezoidal canopy（2-2.3 m）, institute
Can be substantially reduced with its intensity, and the pressure that suffered side pressure is born much larger than trapezoidal canopy leg, still flexible or distortion change
Shape, and easily cause arch back timber and become Λ type（Back timber has in itself and U-shaped becomes V-type）Scrappage is high, and repeatable utilization rate is low.Slightly
Light any also need to transport to ground and keeped in repair by special equipment, maintenance cost is high.
2nd, there is same ground and rouse problem in U-shaped canopy and trapezoidal canopy.Although it highly increased many with section than trapezoidal canopy,
It is nothing but the maintenance cycle extending tunnel.And extend maintenance cycle and it can not be made to service whole work in a maintenance cycle
Make the back production in face, the prolongation of contrary maintenance cycle makes the height carrying joint increased, and workload increased, and maintenance cost does not have
Reduce.
3rd, the average thickness of the western three-soft seam in Henan is in 3-4 m, the height of U-shaped canopy（3-3.5 m）After increase, its height is usually
More than coal seam thickness, this just makes a large amount of spoils in driving and maintenance process, and ature of coal there is no guarantee that.
4th, due to U-shaped canopy excessive height so as in work progress back timber set up difficult, high labor intensive, driving speed
Degree is slow, and security incident easily occurs.
Although the 5, U-shaped canopy is won in succession connection, due to strut cannot be disposed between its canopy and canopy, so canopy under pressure
, away from being guaranteed, deformation in canopy and canopy between, or even U-shaped steel twisted phenomena.
Though the 6, U-shaped canopy is elastic supporting, because not being inconsistent or leg occur in the flexibility of its back timber and the flexibility on leg top
When the bending length on top is inadequate, the blue screw tensile phenomenon of card usually occurs.
7th, because U-shaped canopy is arc, its processing needs special installation, and processing is big with maintenance difficulty, needs in well during maintenance
Transport back and forth up and down, time-consuming take a lot of work, maintenance cost is high.And due to being arc it has not been convenient to transporting and deposit, especially back timber being in lift
During fortune, easy landing injures foot by a crashing object.
Content of the invention
It is an object of the invention to overcoming of the prior art not enough and providing a kind of hexagon galianconism semi open model supporting
And its construction technology.
This supporting decreases the accident rate of frame canopy, improves the progress of frame canopy, improves the compression strength of Liang Peng.
The object of the present invention is achieved like this：
A kind of hexagon galianconism semi open model supporting, including supporting body, described supporting body by the first galianconism, second
Galianconism, the 3rd galianconism, the 4th galianconism, the 5th galianconism and the 6th galianconism are constituted, described the first galianconism, the second galianconism, the 3rd short
Between arm, the 4th galianconism, the 5th galianconism and the 6th galianconism, head and the tail are once flexibly connected by way of hinged.
Based on the above, the first described galianconism and the 4th galianconism are horizontally disposed, and the first described galianconism pushes up for tunnel
Face supporting, the 4th described galianconism is the supporting of tunnel bottom surface；
The adjacent angle of described the first galianconism, the second galianconism, the 3rd galianconism, the 4th galianconism, the 5th galianconism, the 6th galianconism
It is all higher than 90 degree.
Based on the above, it is provided between the described horizontally disposed center of the first galianconism and the center of the 4th galianconism
Vertically column.
Based on the above, also set up between the described horizontally disposed two ends of the first galianconism and the two ends of the 4th galianconism
There is standby column.
Based on the above, described the second galianconism, the 3rd galianconism, the 5th galianconism, the equal length of the 6th galianconism, described
The first galianconism and the 4th galianconism equal length.
Based on the above, described the first galianconism, the second galianconism, the 3rd galianconism, the 4th galianconism, the 5th galianconism and the 6th
The two ends of galianconism are separately installed with articulated elements one and articulated elements two, and described articulated elements one and articulated elements two are hinged.
Based on the above, described the first galianconism, the second galianconism, the 3rd galianconism, the 4th galianconism, the 5th galianconism and the 6th
Galianconism is I-shaped structure, and described articulated elements one fixation is installed on the first galianconism, the second galianconism, the 3rd galianconism, the 4th short
One end of arm, the 5th galianconism and the 6th galianconism, described articulated elements two clip is contained in the other end.
A kind of construction technology technique of hexagon galianconism semi open model supporting is as follows：
1）Construction pre-treatment, will first treat construction tunnel coal and rock and carry out pre- water filling in advance, with fully cementing coal body, prevent
During replacing supporting, side top stream coal causes roof fall to block up wind accident；
2）Support is installed, and comprises the following steps：
1. lay the first galianconism：Choose nest according to the head-room being pre-designed and canopy away from having drawn beam, with steel ruler measurer and outstanding
The method hanging plumb line carries out calibration to heights of roofs and hitch depth, forestope is moved forward to and requires position, forestope refers to
Old cap fixation leans out to hold the joist of new frame back timber to the new top beam part that sets up, and typically adopts I-beam for mine, ∏ type
Girder steel or wooden frame, are propped up the first galianconism to forestope top by operating personnel, according to the canopy being pre-designed away from by the first galianconism
Put fix in position, so that the center of the first galianconism is alignd with center line in roadway, and with level meter calibration the first galianconism levelness, so
Carry out shield top with bamboo sheathing, rafter bar according to construction reference afterwards；
2. the second galianconism, the 6th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two upper lateral part, and make
Second galianconism, the 6th galianconism are coupled with the first galianconism, and side is visited beam reach and held the second galianconism, the 6th galianconism, and side is visited beam and referred to
Old frame two is helped curb girder fixation and is leant out to hold the joist of new frame curb girder to the new curb girder position that sets up, and typically adopts miner
Steel, ∏ section steel beam or wooden frame, then carry out shield top with bamboo sheathing, rafter bar according to construction reference；
3. the 3rd galianconism, the 5th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two side lower part, and make
3rd galianconism, the 5th galianconism are coupled with the second galianconism, the 6th galianconism respectively；
4. place the 4th galianconism：Before laying the 4th galianconism, roadway floor to be carried out bottomed smooth, be carried out with level meter
Correction, it is ensured that the 4th galianconism lays level after the 4th galianconism placement, then makes the 4th galianconism and the 3rd galianconism, the 5th galianconism
Connection；
5. set vertical column：According to design requirement in advance, vertical column is beaten along in the middle part of the first galianconism and the 4th galianconism
If plumb line will be hung when setting to be corrected it is ensured that vertical uprights vertical, in the first galianconism and the 4th galianconism, then vertically stands
Post upper end timber wedge stoppers；
6. win in succession：Help bottom side rail upper end and connect two and win in succession, and be allowed to fixing with curb girder dead.In every two frame canopies
Between back timber, curb girder position make strut with Φ >=60mm round log, each three road struts of top and bottom, each twice of two curb girders,
Must not loosen.
Based on the above, the 4th described galianconism is laid and will be placed on solid base plate, when such as base plate is coal bottom, be
Lower sill beam adds backing plate, to increase the contact area of bottom girder and coal bottom.
The present invention has the advantage that：
1st, this support process adopts hexagon to become trapezoidal canopy or the semi-enclosed support of U-shaped canopy is closed type supporting, and six sides are equal
For line style arm beam, two ends adopt articulated manner to connect, pushed up, bottom, side pressure when, hexagon changes according to stressing conditions and reaches
A kind of stress balance stable state.This support pattern structure is simple, is easy to set up, easy to maintenance, reusable.
2nd, six square supportings uprightly become angle-style two legs of trapezoidal canopy or U-shaped canopy and solve the problems, such as side pressure, and it makes side
The pressurized height of side decreases 50%, and the 50% of its middle and lower part has pressure-bearing to become release.The column at top bottom girder two ends is made not to be subject to side
Pressure, is subjected only to push up bottom pressure, improves compression strength.
3rd, due to the use of the 4th galianconism and curb girder, expand the release area in tunnel, have also been enlarged every frame canopy simultaneously
Bearing area, that is,：The suspension column wear shoes size of trapezoidal canopy or U-shaped canopy presses 0.2 × 0.2 × 2=0.08 square metre, and presses No. 11 miners
Steel, 3 meters of ground beam length, curb girder presses 1.3 meters of calculating, and 5.6 × 0.09=0.504 square metre, be 6 times of trapezoidal canopy or U-shaped canopy, greatly
The speed roused with reducing.Due to ground drum, the coal of extrusion or cash between canopy pass through timely cleaning in tunnel, just can ensure lane at any time
The height in road.Solve trapezoidal canopy and U-shaped canopy constantly to rise because ground rouses the tunnel ground caused not in time with maintenance, head-room
Not the problems such as.
4th, due to using 3 pillars in the middle of the bottom girder of top, it is equal in a disguised form long top bottom girder（As 3m）Become short beam
（1.5m）, according to theoretical calculation, when the beam of same material has 2m to become 1.5m, the pressure that it can carry can improve 3.16
Times, compared with beam, the pressure-bearing of single canopy is equivalent to 3 canopies in the past to the leg of this canopy trapezoidal with the past and U-shaped more than canopy 2m, improves arm
The compression strength of beam.
5th, hinged due to adopting between arm beam and arm beam, arm beam 180 degree can be enable to stand up that is to say, that going out in arm beam
During existing microbend, as long as holding arms beam carries out 180 degree and stands up it is possible to automatically correct arm deflection of beam using ore deposit pressure, it is to avoid mistake
Go arm beam, leg bending post-tensioning to draw the trouble being corrected, decrease the loss of support material simultaneously, decrease material
Freight volume and spoilage（U-shaped canopy can cause very big disposable loss not in time due to pressure and maintenance, the trapezoidal canopy in past because
Bending causes to be lost）.Because it is not flexible, this support material is reusable, reduces cost.
6th, adopt back-to-back seamless connectivity in design because male and female is hinged, wide arc gap is realized, so subtracting in bearing pin and hole
The little stress of bearing pin.It may be said that in normal state, bearing pin does not stress, and only plays a connection function.
7th, because tunnel ensure that height and section, generally without carrying joint, decrease road maintenance amount, under
Half portion only need to be cleared up the coal of extrusion in time, and the first half is when pressure causes greatly sack bag, as long as first water filling, then by fiber crops
The release of bag pine side.
8th, due to being hexagon, so cable both can have been laid in the triangle beyond two side columns, pipe can be set up again
Road, can also fix starting device simultaneously, can also regard maintenance of equipment space.Make rectangular tunnel neat, clean, whole
Clean.
9th, due to all beam columns be straight, material transport, the aspect such as to pile up convenient and swift, it is possible to reduce artificial and
Space.Also reduce because transporting the light servere injury accident being inconvenient to cause simultaneously.Particular avoid U-shaped canopy scarce in transport is deposited
Point.
10th, compared with U-shaped canopy tunnel, tunnel step-down（Below 2.5m is changed into from 3.5m height）, reduce the work of frame canopy
Intensity, decreases the accident rate of frame canopy, improves progress.
11st, because the western three-soft seam in Henan is thin, this supporting reduces head-room, increased width, decrease in driving because
Head-room is higher than coal seam thickness and puies forward the spoil amount of joint increase it is ensured that ature of coal.
Brief description
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation with standby column.
Fig. 3 is the main structure diagram of six roots of sensation galianconism.
Fig. 4 is the side structure schematic view of six roots of sensation galianconism.
Fig. 5 is the Section A-A view of six roots of sensation galianconism.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
As shown in Fig. 1,2,3,4,5, a kind of construction technology of hexagon galianconism semi open model supporting, technique is as follows：
1）Construction pre-treatment, to first treat construction tunnel coal and rock and carry out pre- water filling in advance, with fully cementing coal body so that
Coal body is cementing blocking, thus without there is stream coal phenomenon, prevents side top stream coal during replacing supporting from causing roof fall to block up wind accident；
2）Support is installed, and comprises the following steps：
1. lay the first galianconism：Choose nest according to the head-room being pre-designed and canopy away from having drawn beam, with steel ruler measurer and outstanding
The method hanging plumb line carries out calibration to heights of roofs and hitch depth, forestope is moved forward to and requires position, will by operating personnel
First galianconism props up to forestope top, puts fix in position according to the canopy being pre-designed away from by the first galianconism, makes the first galianconism
Center align with center line in roadway, and with level meter calibration the first galianconism levelness, then use bamboo sheathing, rafter bar according to construction mark
Standard carries out shield top；
2. the second galianconism, the 6th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two upper lateral part, and make
Second galianconism, the 6th galianconism are coupled with the first galianconism, and side is visited beam reach and held the second galianconism, the 6th galianconism, then use bamboo sheathing, rafter
Bar carries out shield top according to construction reference；
3. the 3rd galianconism, the 5th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two side lower part, and make
3rd galianconism, the 5th galianconism are coupled with the second galianconism, the 6th galianconism respectively；
4. place the 4th galianconism：Before laying the 4th galianconism, roadway floor to be carried out bottomed smooth, be carried out with level meter
Correction, it is ensured that the 4th galianconism lays level after the 4th galianconism placement, then makes the 4th galianconism and the 3rd galianconism, the 5th galianconism
Connection；
5. set vertical column：According to design requirement in advance, vertical column is beaten along in the middle part of the first galianconism and the 4th galianconism
If plumb line will be hung when setting to be corrected it is ensured that vertical uprights vertical, in the first galianconism and the 4th galianconism, then vertically stands
Post upper end timber wedge stoppers；
6. win in succession：Help bottom side rail upper end and connect two and win in succession, and be allowed to fixing with curb girder dead.In every two frame canopies
Between back timber, curb girder position make strut with Φ >=60mm round log, each three road struts of top and bottom, each twice of two curb girders,
Must not loosen.
Cost comparisons：
Taking precious jade ridge coal industry as a example to illustrate：
Site operation is repaiied according to the driving of down-hole in recent years and expansion and grasps situation, be now described as follows：
1st, tunnel unit price：Excavated section 14.4m net section 14.4m
Full coal road：2662.5 yuan/m of labour cost, 3706.15 yuan/m of fee of material
Half coal road：3595.7 yuan/m of labour cost, 3723.61 yuan/m of fee of material
2nd, expand and repair unit price：Excavated section 14.4m net section 14.4m
Full coal road：1594.9 yuan/m of labour cost, 1698.47 yuan/m of fee of material
Half coal road：2103.4 yuan/m of labour cost, 1708.97 yuan/m of fee of material
3rd, road maintenance rate：U-shaped steel supporting
（1）Dynamic pressure area：1 time/month
（2）Cai Mianliang lane：Expand the 5-7 month and repair 1 time
（3）Static pressure area：Expand the 12-15 month and repair 1 time
4th, U-shaped steel scrappage：
Back timber is all scrapped, both sides leg：Every 10m scraps 4
Beam and the worthwhile scrappage of leg：42%
After improvement, tunnel section design is 8m.Then：
Calculated with coal road, labour cost can be saved：
2662.5 yuan/m × 45%=1198 unit/m
Pay lane up and down and can save ten thousand yuan of 1198 yuan/m × 1000m=119.8 of driving expense.
Pay lane up and down and repair calculating by 2 years 4 times expansions, labour cost presses original 50%：
1594.9 × 50%=797.45 unit/m
Tunnel length presses 1000 m, and maintenance length presses 500 m, then working face viability maintenance cost can be saved：
Ten thousand yuan of 500 × 797.45 × 4=159.49
Because, in maintenance, there is not consumption and can save in support material（Low value can be comprised in 797.45 yuan/m completely easily consume
Product）, then fee of material can save：
Ten thousand yuan of 500 × 1698.5 × 4=335.6.
Then add up to and save：
119.8+159.49+335.6=614.9 ten thousand yuan, not calculating this support material in addition and repeat using saving
Expense and support material enters well and waste material goes out the expense of well.
Taking Xing Cun coal industry as a example
Each working face of its down-hole need to tunnel a centralized rock roadway, and its cost is 10,000 yuan every meter, according to year working face extraction
Length is 1000 meters of calculating, can save 1,000 ten thousand yuan year.Because its coal road remains a need for digging, it cuts the expense of eye every 150 meters of drivings
The day-to-day maintenance of six square supportings can be offset completely.And put into because this supporting is substantially disposable, repeat
Using, its later stage using there is no support material early investment.
Claims (1)
1. a kind of construction technology of hexagon galianconism semi open model supporting, this hexagon galianconism semi open model supporting, including supporting
Body（1）It is characterised in that：Described supporting body（1）By the first galianconism（2）, the second galianconism（3）, the 3rd galianconism（4）,
Four galianconism（5）, the 5th galianconism（6）With the 6th galianconism（7）Constitute, described the first galianconism（2）, the second galianconism（3）, the 3rd galianconism
（4）, the 4th galianconism（5）, the 5th galianconism（6）With the 6th galianconism（7）Between pass sequentially through hinged mode from beginning to end and be flexibly connected；Institute
The first galianconism stated（2）With the 4th galianconism（5）The first horizontally disposed, described galianconism（2）For tunnel face support, described
Four galianconism（5）For the supporting of tunnel bottom surface；The first described galianconism（2）, the second galianconism（3）, the 3rd galianconism（4）, the 4th galianconism
（5）, the 5th galianconism（6）, the 6th galianconism（7）Adjacent angle is all higher than 90 degree；Described the first horizontally disposed galianconism（2）'s
Center and the 4th galianconism（5）Center between be provided with vertical column（8）；Described the first horizontally disposed galianconism（2）Two
End and the 4th galianconism（5）Two ends between be additionally provided with standby column（9）；The second described galianconism（3）, the 3rd galianconism（4）,
Five galianconism（6）, the 6th galianconism（7）Equal length, described the first galianconism（2）With the 4th galianconism（5）Equal length；Described
First galianconism（2）, the second galianconism（3）, the 3rd galianconism（4）, the 4th galianconism（5）, the 5th galianconism（6）With the 6th galianconism（7）Two
End is separately installed with articulated elements one and articulated elements two, and described articulated elements one and articulated elements two are hinged；Described first is short
Arm（2）, the second galianconism（3）, the 3rd galianconism（4）, the 4th galianconism（5）, the 5th galianconism（6）With the 6th galianconism（7）It is I shape
Structure, described articulated elements one fixation is installed on the first galianconism（2）, the second galianconism（3）, the 3rd galianconism（4）, the 4th galianconism（5）、
5th galianconism（6）With the 6th galianconism（7）One end, described articulated elements two clip is contained in the other end；
Technique is as follows：
1）Construction pre-treatment, will first treat construction tunnel coal and rock and carry out pre- water filling in advance, with fully cementing coal body；
2）Support is installed, and comprises the following steps：
1. lay the first galianconism：Choose nest according to the head-room being pre-designed and canopy away from having drawn beam, with steel ruler measurer and suspension lead
The method of vertical line is chosen nest depth to heights of roofs and beam and is carried out calibration, forestope is moved forward to and requires position, by operating personnel by
One galianconism props up to forestope top, puts fix in position according to the canopy being pre-designed away from by the first galianconism；
2. the second galianconism, the 6th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two upper lateral part, and make second
Galianconism, the 6th galianconism are coupled with the first galianconism, and side is visited beam reach and held the second galianconism, the 6th galianconism, is then pressed with bamboo sheathing, rafter bar
Carry out shield top according to construction reference；
3. the 3rd galianconism, the 5th galianconism are laid：Draw according to the angle being pre-designed and length and dig tunnel two side lower part, and make the 3rd
Galianconism, the 5th galianconism are coupled with the second galianconism, the 6th galianconism respectively；
4. place the 4th galianconism：Before laying the 4th galianconism, roadway floor to be carried out bottomed smooth, carry out school with level meter
Just, it is ensured that the 4th galianconism lays level after the 4th galianconism is placed, the 4th galianconism and the 3rd galianconism, the 5th galianconism connection are then made
Connect；
5. set vertical column：According to design requirement in advance, vertical column sets along in the middle part of the first galianconism and the 4th galianconism, beats
If when to hang plumb line and be corrected it is ensured that vertical uprights vertical is in the first galianconism and the 4th galianconism, then vertically on column
End timber wedge stoppers；
6. win in succession：Two help second and third, five, six galianconism upper ends connect and win in succession, and be allowed to second and third, five, six short
Arm is fixing dead,
Strut is made with Φ >=60mm round log in first, second and third, five, six galianconism positions between every two frame canopies, the first galianconism three
Road strut, second and third, each twice of five, six galianconism, must not loosen.
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| CN201510069306.7A CN104653201B (en) | 2015-02-11 | 2015-02-11 | Hexagonal short arm half-opened support and construction process thereof |
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| CN201510069306.7A CN104653201B (en) | 2015-02-11 | 2015-02-11 | Hexagonal short arm half-opened support and construction process thereof |
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| CN104653201B true CN104653201B (en) | 2017-02-22 |
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| CN110130397A (en) * | 2019-05-15 | 2019-08-16 | 天津大学 | Tilt hexagon piping lane system and its construction method of the supporting in conjunction with main structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4129171C2 (en) * | 1991-09-03 | 1994-05-05 | Bergwerksverband Gmbh | Compliant expansion |
| CN2195618Y (en) * | 1994-05-17 | 1995-04-26 | 中国矿业大学 | Special chock for galleries |
| CN101333933B (en) * | 2008-07-31 | 2010-06-09 | 中国矿业大学 | Hyperstatic hydraulic support |
| CN102052083B (en) * | 2010-12-09 | 2013-05-22 | 中国矿业大学 | Polygonal hydraulic active support bracket |
| CN103557020B (en) * | 2013-11-07 | 2015-07-01 | 辽宁工程技术大学 | Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel |
| CN103643980B (en) * | 2013-12-27 | 2016-04-20 | 重庆天巨承机械制造有限责任公司 | A kind of high-dipping medium-thickness seam shield support |
| CN204476435U (en) * | 2015-02-11 | 2015-07-15 | 杨晓东 | The supporting of a kind of hexagon galianconism semi open model |
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