CN105649657B - A kind of U-shaped steel support with flexible steady knot support - Google Patents
A kind of U-shaped steel support with flexible steady knot support Download PDFInfo
- Publication number
- CN105649657B CN105649657B CN201610131852.3A CN201610131852A CN105649657B CN 105649657 B CN105649657 B CN 105649657B CN 201610131852 A CN201610131852 A CN 201610131852A CN 105649657 B CN105649657 B CN 105649657B
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- Prior art keywords
- support
- card cable
- shaped steel
- back timber
- seat
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 230000008093 supporting effect Effects 0.000 claims abstract description 32
- 239000000725 suspension Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/22—Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of U-shaped steel support with flexible steady knot support, including back timber（1）, post leg（2）, connector（3）With inner arched support member（4）；Inner arched support member is arranged on back timber or supporting leg, including stand connection（41）, support bar（43）And supporting bar connector（44）；Stand connection sets at least to two pieces, including card cable plate（411）, card cable seat II（412）With card cable bolt；Card cable seat II（412）The hinged seat for being secured to connection is provided with towards the lateral surface position on the inside of domes；Support bar sets at least to two pieces, and one end is articulated and connected by swivel pin with card cable seat II, the other end is fixedly clamped by supporting bar connector overlap joint and is connected.This has the U-shaped steel supporting structure of flexible steady knot support simple, has higher support strength, existing effect support can be locally compacted for the small area of a certain position in tunnel, and then realize safety support.
Description
Technical field
The present invention relates to a kind of U-shaped steel support, specifically one can locally press roadway surrounding rock and carry out allowing pressure to have
The U-shaped steel support of flexible steady knot support, belongs to underground coal mine support equipment technical field.
Background technology
U-shaped steel support is a kind of passive protecting, and tensile strength, compression strength are higher, while has good toughness properties,
Support force is higher, and supporting intensity is big, can be used for multiple times, and is widely used in mine working, particularly in deep complexity tunnel
And in weak seam tunnel, it is generally intended for use primarily in the mine laneway of mine laneway secondary supporting and mountain tunnel.
The optimal stress of U-shaped steel support be support with backfilling it is closely knit after make its uniform-compression, when acting on U-shaped steel support
On pressure from surrounding rock value when reaching certain value, support can produce compression, shoulder bed effects is declined in the pressure on U-shaped steel support,
Support is destroyed so as to avoid pressure from surrounding rock from being more than the bearing capacity of U-shaped steel support.
Existing U-shaped steel support generally includes back timber, post leg and connector, and top beam and column leg overlap joint connects and passes through connection
Part is connected, and generally an entirety, the U of this traditional structure can be connected to become by pull bar between frame between multiple U-shaped steel supports
Shape steel bracket for the large area in tunnel it is firm come pressure energy energy enough absorbed by deformation retract carry out effective support, but tunnel
It is to be unable to that perfect forecast is accurate that buckling is carried out in inside, and the ability that the U-shaped steel support of traditional structure bears lateral pressure is relatively born
The ability of top pressure is weak, is always pressed especially for the small area partial side of a certain position of back, it will usually causes pair
Answer the U-shaped steel set cap of position to be influenceed to press by lateral and cause support surrounding unbalance stress, easily cause support locally overload,
Unbalance loading, so cause rack bearing ability decline, stability reduce, or even stress it is excessive beyond its bearing capacity and destroy；Together
When support produce shrink sliding after its stability can further decline, easily cause support unstability or supporting failure, influence tunnel
Supporting effect simultaneously brings larger potential safety hazard, is not only not easy to change, and replacing generally has very big danger.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of U-shaped steel support with flexible steady knot support simple in construction,
With higher lateral support intensity, carry out horizontal transfer can be pressed for the small area part high stress of a certain position in tunnel
And energy absorption, and then realize and reduce local deformation, integrally-built enabling capabilities and stability enhancing, so as to realize safety support
Shield.
To achieve the above object, there is the U-shaped steel support of flexible steady knot support to include back timber, post leg and connection for this
Part, top beam and column leg is made and pushed up using U-shaped steel is equipped with the bending curvature worked in coordination, two pieces post leg on beam and column leg
An at least back timber surrounds the domes of tunnel inwall jointly after being connected by connector overlap joint；Connector includes card cable seat
I and card cable bolt, the inner surface setting of card cable seat I is into the U-shaped structure of the form fit with U-shaped steel, and card cable seat I is provided with card cable
Bolt mounting holes；
There is the U-shaped steel support of flexible steady knot support also to include inner arched support member, inner arched support for this
Part is arranged on back timber or post leg, including stand connection, support bar and supporting bar connector；
Stand connection sets at least to two pieces, including card cable plate, card cable seat II and card cable bolt；Card cable plate is arranged on arch
The outside of shape structure, card cable plate are provided with card cable bolt mounting hole；The medial surface of card cable seat II is arranged to match somebody with somebody with the profile of U-shaped steel
The U-shaped structure of conjunction, card cable plate is corresponded on card cable seat II and also is provided with card cable bolt mounting hole, card cable seat II is towards on the inside of domes
Lateral surface position be provided be secured to connection hinged seat；
Support bar sets at least to two pieces, support bar one end is articulated and connected by the hinged seat of swivel pin and card cable seat II,
The other end overlaps the connection that is fixedly clamped by supporting bar connector；
Supporting bar connector includes train wheel bridge, lower plate and clamping plate connecting bolt.
Scheme as a further improvement on the present invention, described inner arched support member also include stand connection and moved
Device, stand connection mobile device is arranged on back timber or post leg and stand connection mobile device is connected with card cable plate.
As one embodiment of the present invention, described stand connection mobile device is winch configurations, including multiple
Capstan winch and the steel wire rope being wrapped on capstan winch, capstan winch correspond to stand connection position be fixedly mounted on above stand connection with
On the back timber or post leg of the domes of lower section, the position that capstan winch is corresponded on described back timber or post leg is provided with jack hole, steel wire
One end is arranged on the U-shaped inside of U-shaped steel through jack hole and is connected with one end of card cable plate rope, the other end is wrapped on capstan winch simultaneously
It is connected with capstan winch.
The U-shaped inner surface of scheme as a further improvement on the present invention, described jack hole and U-shaped steel is provided with along steel wire
The guide wheel for steel wire or steel wire rope guide roller of rope drawing trend.
As the preferred scheme of the present invention, described stand connection mobile device also includes crank, and one end of crank leads to
The axis that fast joint structure is crossed with described capstan winch is connected.
Scheme as a further improvement on the present invention, described support bar are connected under back timber by bindiny mechanism's suspension
Side.
As the preferred scheme of the present invention, described bindiny mechanism is steel wire rope or chain.
Scheme as a further improvement on the present invention, described inner arched support member is setting up and down along domes to be
It is multiple.
Scheme as a further improvement on the present invention, described support bar also use U-shaped steel structure.
Scheme as a further improvement on the present invention, described supporting bar connector are arranged on support bar length direction
More than one piece.
Compared with prior art, this has the U-shaped steel support of flexible steady knot support due to being provided with a left side below back timber
The inner arched support member of right setting, and the card cable plate face of stand connection is overlapped after connecting to top beam and column leg and surrounded jointly
The one side of tunnel inwall domes is provided with the hinged seat for being secured to connection, support bar one end is connected by swivel pin and support
The hinged seat of fitting is articulated and connected, the other end of support bar overlaps the connection that is fixedly clamped by supporting bar connector, therefore in lane
The small area of a certain position of road top plate locally to press when, the overlap joint clamped condition of the inner arched support member of this position of face
Support bar has certain friction operation resistance and certain contracting amount, sustainable domes, when stress is excessive, support bar
Frictional force can be overcome inwardly to slide, until reaching new equalization point, to form the top beam and column leg of domes so as to protect, avoid
Back timber or post leg destroy beyond its bearing capacity, and then realize effective support, improve and whole have flexible steady knot support dress
The support strength for the U-shaped steel support put；This U-shaped steel supporting structure with flexible steady knot support is simple, system easy to process
Make and install, especially suitable for the supporting in deep complexity tunnel and weak seam tunnel.
Brief description of the drawings
Fig. 1 is the three dimensional structure diagram of the present invention；
Fig. 2 is that the present invention is front view；
Fig. 3 is the three dimensional structure diagram that the present invention uses more than one piece inner arched support member.
In figure：1st, back timber, 2, post leg, 3, connector, 4, inner arched support member, 41, stand connection, 411, card cable
Plate, 412, card cable seat II, 42, stand connection mobile device, 43, support bar, 44, supporting bar connector.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, there is the U-shaped steel support of flexible steady knot support to include back timber 1, post leg 2, the and of connector 3 for this
Inner arched support member 4.
Described back timber 1 and post leg 2 made using U-shaped steel and be equipped with back timber 1 and post leg 2 work in coordination it is curved
Curvature, at least two pieces post leg 2 and a back timber 1 surround the arch knot of tunnel inwall jointly after being connected by the overlap joint of connector 3
Structure, an entirety is connected to become by pull bar between frame between multiple domes.
Described connector 3 includes card cable seat I and card cable bolt, and the inner surface setting of card cable seat I is matched somebody with somebody into the profile with U-shaped steel
The U-shaped structure of conjunction, and card cable seat I is provided with the card cable bolt mounting hole for installation card cable bolt, by being tightened in card cable seat I
Gu card cable bolt realizes that back timber 1 and the overlap joint of post leg 2 are fastenedly connected.
Described inner arched support member 4 is arranged on back timber 1 or post leg 2, including stand connection 41, support bar 43
With supporting bar connector 44；
Stand connection 41 sets at least to two pieces, including card cable plate 411, card cable seat II 412 and card cable bolt；Card cable plate
411 are arranged on the outside of domes, and card cable plate 411 is provided with the card cable bolt mounting hole for installation card cable bolt；Card cable
The medial surface of seat II 412 is arranged to the U-shaped structure with the form fit of U-shaped steel, and card cable plate 411 is corresponded on card cable seat II 412
Provided with card cable bolt mounting hole, card cable seat II 412 is provided with towards the lateral surface position on the inside of domes and is secured to connect
Hinged seat, by worn on card cable plate 411 and card cable seat II 412 connect card cable bolt and fasten realize stand connection 41 and top
Beam 1 or post leg 2 are fastenedly connected；
Support bar 43 sets at least to two pieces, and the one end of support bar 43 is cut with scissors by the hinged seat of swivel pin and card cable seat II 412
Connect in succession, the other end overlaps the connection that is fixedly clamped by supporting bar connector 44；
Supporting bar connector 44 includes train wheel bridge, lower plate and clamping plate connecting bolt, by being worn on train wheel bridge, lower plate
Fishplate connecting bolt and fasten realize that the overlap joint of two pieces support bar 43 is fastenedly connected.
This has the U-shaped steel support of flexible steady knot support when in use, first pacifies stand connection mobile device 42
On back timber 1 or post leg 2, back timber 1 and post leg 2 are then overlapped into connection by connector 3, are supported on back and bottom plate
The card cable bolt of back timber 1 and the connector 3 of the lap position of post leg 2 is fastened after upper, then by pull bar between frame by multiple arches
Structure is connected to become an entirety, and then tunnel is expected to press position will come the calculating data pressed in domes on the estimation
Card cable plate 411 is filled in the gap on the outside of domes between wall, then by card cable seat II 412 and card cable plate 411
It is fastenedly connected by card cable bolt, then penetrating swivel pin on card cable seat II 412 is hinged support bar 43 and led to
Cross supporting bar connector 44 to be fixedly connected with the overlap joint of two pieces support bar 43, inner arched support member 4 is i.e. in domes
It is internally formed effective support.
Tunnel come press or it is local to press when, there is frictional force, so as to ensure domes between back timber 1 and post leg 2
With certain working resistance and certain contracting amount, while support bar 43 can produce certain branch to post leg 2 and/or back timber 1
Support force, the axis direction of the direction of the support force along support bar 43, when support force gradually increases the maximum to supporting bar connector 44
During grip friction working resistance, support bar 43 can overcome frictional force inwardly to slide, until reaching new equalization point, so as to protect shape
The post leg 2 and/or back timber 1 for the structure that overarches, post leg 2 or back timber 1 is avoided to be destroyed beyond its bearing capacity, while support bar 43
Side high stress can be shifted so that the both sides stress equalization of arching mechanism, not only realize effective support, improve whole U
The support strength of shape steel bracket, and improve the resistance to overturning of support.
Pressed or local come to press position be generally only according to the estimating position being calculated due to tunnel, be typically non-
Accurate variable value, in order that inner arched support member 4 can on the estimation position changeability realize effectively support, as
Further improvement of the present invention scheme, described inner arched support member 4 also include stand connection mobile device 42, support
Connector mobile device 42 is arranged on back timber 1 or post leg 2 and stand connection mobile device 42 is connected with card cable plate 411, props up
Frame connector mobile device 42 can drive branch by driving card cable plate 411 on the premise of the card cable bolt of releases clamp connector 41
Frame connector 41 is overall, and position is moved in certain limit on domes, first by inner arched supporting part when carrying out position adjustments
Each card cable bolt and clamping plate connecting bolt on part 4 unclamp, and fasten each card cable bolt after position adjustment is good again and connect spiral shell with clamping plate
Bolt, and then realize effectively support.
Because the U-shaped inner space of U-shaped steel is relatively small, in order to make full use of this small space to realize to card cable plate 411
Mobile control, as one embodiment of the present invention, described stand connection mobile device 42 is winch configurations, including
Multiple capstan winches and the steel wire rope being wrapped on capstan winch, the position that capstan winch corresponds to stand connection 41 is fixedly mounted on stand connection
On the back timber 1 or post leg 2 of domes above and below in the of 41, the position that capstan winch is corresponded on described back timber 1 or post leg 2 is provided with
Jack hole, steel wire rope one end are arranged on the U-shaped inside of U-shaped steel through jack hole and are connected with one end of card cable plate 411, the other end
It is wrapped on capstan winch and is connected with capstan winch, the capstan winch that diverse location is rotated by driving realizes that steel wire rope pulls card cable plate 411, enters
And realize drawing stand connection 41 and moved on domes.
In order to prevent the U-shaped inner surface friction in steel wire rope traction process with jack hole and U-shaped steel from causing to wear, this is used as
The U-shaped inner surface of the further improvement project of invention, described jack hole and U-shaped steel is provided with the steel that trend is pulled along steel wire rope
Cord directive wheel or steel wire rope guide roller.
Described capstan winch can also use crank driving rotation, due to underground by hydraulic pressure or electrically driven rotation
Operating mode and environment are more complicated, and cost more complicated using the former structure is higher, and the latter it is structurally and operationally relatively simple and into
This is relatively low, therefore preferred the latter, i.e. as the preferred scheme of the present invention, described stand connection mobile device 42 also includes
Crank, one end of crank are connected by fast joint structure with the axis of described capstan winch, and operator can be by shaking crank
Driving capstan winch rotation is realized, because the usual very little in gap on the outside of domes between wall is even without gap, card cable
Plate 411 moves relatively difficult, therefore the radius of turn of crank can set and sufficiently large can further reach to obtain larger drive
The purpose of power.
In order to ensure that uniform stressed slides the support bar 43 of inner arched support member 4 in the horizontal direction, prevents because certainly
Body gravity influences to produce downward shearing force, and then influences support effect, and scheme, described as a further improvement on the present invention
Support bar 43 is connected to the lower section of back timber 1 by bindiny mechanism's suspension.
Described bindiny mechanism can use the rigid connection structure being directly connected to such as steel plate, can also use such as steel wire rope
Or the flexible connecting structure of chain connection, because the latter is easier according to the small area of back diverse location locally come buckling
The more position of inner arched support member 4, therefore preferred the latter, i.e. as the preferred scheme of the present invention, as shown in figure 1, described
Bindiny mechanism be steel wire rope or chain.
In order to further enhance the compression strength of domes, scheme as a further improvement on the present invention, described arch
Shape internal support member 4 is setting up and down to be multiple along domes.
In order to increase pretightning force of the support bar 43 under the clamped condition of supporting bar connector 44, as the further of the present invention
Improvement project, described support bar 43 also use U-shaped steel structure.
In order to further increase pretightning force of the support bar 43 under the clamped condition of supporting bar connector 44, as the present invention's
Further improvement project, described supporting bar connector 44 are arranged to more than one piece on the length direction of support bar 43.
This has in the arch that the U-shaped steel support of flexible steady knot support is set due to being provided with left and right below back timber 1
Portion's support member 4, and the card cable plate face of stand connection 41 overlaps after connecting to back timber 1 and post leg 2 and surrounds tunnel inwall jointly
The one side of domes is provided with the hinged seat for being secured to connection, the one end of support bar 43 passes through swivel pin and stand connection 41
Hinged seat be articulated and connected, the other end of support bar 43 is fixedly clamped connection by the overlap joint of supporting bar connector 44, therefore in lane
The small area of a certain position of road top plate locally to press when, the overlap joint clamped condition of the inner arched support member 4 of this position of face
Support bar 43 there is certain friction operation resistance and certain contracting amount, sustainable domes, when stress is excessive, branch
Strut 43 can overcome frictional force inwardly to slide, and until reaching new equalization point, the back timber of domes 1 and post are formed so as to protect
Leg 2, avoid back timber 1 or post leg 2 from being destroyed beyond its bearing capacity, and then realize effective support, improve entirely with flexibility
The support strength of the U-shaped steel support of steady knot support；This U-shaped steel supporting structure with flexible steady knot support is simple,
Making and installation easy to process, especially suitable for the supporting in deep complexity tunnel and weak seam tunnel.
Claims (10)
1. a kind of U-shaped steel support with flexible steady knot support, including back timber（1）, post leg（2）And connector（3）, back timber
（1）With post leg（2）Using U-shaped steel making and back timber（1）With post leg（2）On be equipped with the bending curvature worked in coordination, two pieces
Post leg（2）An at least back timber（1）Pass through connector（3）The domes of tunnel inwall are surrounded after overlap joint connection jointly；Even
Fitting（3）Including card cable seat I and card cable bolt, the inner surface setting of card cable seat I into the form fit with U-shaped steel U-shaped structure, and
Card cable seat I is provided with card cable bolt mounting hole；Characterized in that,
U-shaped steel support with flexible steady knot support also includes inner arched support member（4）, inner arched support member
（4）Installed in back timber（1）Or post leg（2）On, including stand connection（41）, support bar（43）And supporting bar connector（44）；
Stand connection（41）Set at least to two pieces, including card cable plate（411）, card cable seat II（412）With card cable bolt；Card cable
Plate（411）It is arranged on the outside of domes, card cable plate（411）It is provided with card cable bolt mounting hole；Card cable seat II（412）It is interior
Side is arranged to the U-shaped structure with the form fit of U-shaped steel, card cable seat II（412）Upper corresponding card cable plate（411）It also is provided with card cable
Bolt mounting holes, card cable seat II（412）It is provided with towards the lateral surface position on the inside of domes and is secured to the be hinged of connection
Seat；
Support bar（43）Set at least to two pieces, support bar（43）One end passes through swivel pin and card cable seat II（412）Hinged seat
It is articulated and connected, the other end passes through supporting bar connector（44）Overlap the connection that is fixedly clamped；
Supporting bar connector（44）Including train wheel bridge, lower plate and clamping plate connecting bolt.
2. the U-shaped steel support with flexible steady knot support according to claim 1, it is characterised in that described arch
Shape internal support member（4）Also include stand connection mobile device（42）, stand connection mobile device（42）Installed in top
Beam（1）Or post leg（2）Upper and stand connection mobile device（42）With card cable plate（411）Connection.
3. the U-shaped steel support with flexible steady knot support according to claim 2, it is characterised in that described branch
Frame connector mobile device（42）It is winch configurations, including multiple capstan winches and the steel wire rope that is wrapped on capstan winch, the corresponding branch of capstan winch
Frame connector（41）Position be fixedly mounted on stand connection（41）Above and below domes back timber（1）Or post leg
（2）On, described back timber（1）Or post leg（2）The position of upper corresponding capstan winch is provided with jack hole, and steel wire rope one end is set through jack hole
Put the U-shaped inside of U-shaped steel and with card cable plate（411）One end connection, the other end is wrapped on capstan winch and is connected with capstan winch.
4. the U-shaped steel support with flexible steady knot support according to claim 3, it is characterised in that described wears
The U-shaped inner surface for connecing hole and U-shaped steel is provided with the guide wheel for steel wire or steel wire rope guide roller that trend is pulled along steel wire rope.
5. the U-shaped steel support with flexible steady knot support according to claim 3 or 4, it is characterised in that described
Stand connection mobile device（42）Also include crank, one end of crank passes through fast joint structure and the axis of described capstan winch
Connection.
6. the U-shaped steel support with flexible steady knot support according to Claims 1-4 any claim, it is special
Sign is, described support bar（43）Back timber is connected to by bindiny mechanism's suspension（1）Lower section.
7. the U-shaped steel support with flexible steady knot support according to claim 6, it is characterised in that described company
Connection mechanism is steel wire rope or chain.
8. the U-shaped steel support with flexible steady knot support according to Claims 1-4 any claim, it is special
Sign is, described inner arched support member（4）It is setting up and down to be multiple along domes.
9. the U-shaped steel support with flexible steady knot support according to Claims 1-4 any claim, it is special
Sign is, described support bar（43）Also U-shaped steel structure is used.
10. the U-shaped steel support with flexible steady knot support according to Claims 1-4 any claim, it is special
Sign is, described supporting bar connector（44）In support bar（43）More than one piece is arranged on length direction.
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| CN201610131852.3A CN105649657B (en) | 2016-03-09 | 2016-03-09 | A kind of U-shaped steel support with flexible steady knot support |
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| CN201610131852.3A CN105649657B (en) | 2016-03-09 | 2016-03-09 | A kind of U-shaped steel support with flexible steady knot support |
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| CN105649657A CN105649657A (en) | 2016-06-08 |
| CN105649657B true CN105649657B (en) | 2018-04-03 |
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| CN110847937B (en) * | 2019-10-28 | 2021-06-15 | 中国矿业大学 | U-shaped steel support and method for controlling surrounding rock of roadway through graded active loading |
| CN111810201A (en) * | 2020-07-13 | 2020-10-23 | 程良 | Can let pressure U shaped steel support |
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|---|---|---|---|---|
| CN1049393A (en) * | 1990-07-11 | 1991-02-20 | 中国矿业大学 | Two locate mode card cables and moulding process |
| CN1241678A (en) * | 1998-07-14 | 2000-01-19 | 平顶山煤业(集团)有限责任公司 | Jointing method for telescopic U-steel overlap sections of support |
| CN102268999A (en) * | 2010-06-01 | 2011-12-07 | 颜曙光 | Method for improving support stability of U-shaped steel arch centering and connecting assembly |
| CN103133014A (en) * | 2011-11-23 | 2013-06-05 | 上海申通地铁集团有限公司 | Flexible connection structure for steel pipe and tunnel steel pipe piece |
| CN204921009U (en) * | 2015-09-11 | 2015-12-30 | 华北科技学院 | Coal mine tunnel struts support |
| CN205445636U (en) * | 2016-03-09 | 2016-08-10 | 中国矿业大学 | U shaped steel support with strutting arrangement is surely tied to flexibility |
Also Published As
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|---|---|
| CN105649657A (en) | 2016-06-08 |
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