CN104832188B - Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof - Google Patents
Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof Download PDFInfo
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- CN104832188B CN104832188B CN201510184878.XA CN201510184878A CN104832188B CN 104832188 B CN104832188 B CN 104832188B CN 201510184878 A CN201510184878 A CN 201510184878A CN 104832188 B CN104832188 B CN 104832188B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 389
- 239000010959 steel Substances 0.000 title claims abstract description 389
- 239000004567 concrete Substances 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000007569 slipcasting Methods 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 13
- 230000008093 supporting effect Effects 0.000 claims description 13
- 239000004033 plastic Substances 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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- 239000011440 grout Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
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Abstract
The invention provides a concrete filled steel tube roadside support system used for large-section gob-side entry retaining and a support method thereof. The system comprises Pi-type steel beams which are closely clung to a top plate, concrete filled steel tube stand columns which support the Pi-type steel beams of the top plate, elliptical ring bases which sleeve the lower parts of the concrete filled steel tube stand columns, and inclined hydraulic jacks with the elliptical ring bases acting as hinged pivots, wherein the end heads of the inclined hydraulic jacks support the Pi-type steel beams and metal meshes of the surface of the filling wall. A truss structure formed by the concrete filled steel tube stand columns has the main support effect on the top plate and controls subsidence and deformation of the top plate in cooperation with the filling wall. Moderate underframe sinking and pressure releasing can be performed by the concrete filled steel tube stand columns in the process so that stability of the concrete filled steel tube stand columns in a vertical direction can be increased, and then the hydraulic jacks, which are arranged in an inclined way with the elliptical ring bases acting as the hinged pivots, can provide relatively high acting force to support the Pi-type steel beams and the metal meshes of the surface of the filling wall.
Description
Technical field
The invention belongs to colliery tunnel support technical field, more particularly, to a kind of steel pipe for big cross section gob side entry retaining mixes
Solidifying soil roadside support system and method for protecting support.
Background technology
Gob side entry retaining refers to retain the stope drift active workings at mining face rear along mined out area edge with certain method
Come, as the stope drift active workings in subsequent work face.Gob side entry retaining not only can cancel segment protection coal column, improves coal resources back production
Rate, alleviates excavation replacement anxiety, also can achieve the ventilation of work surface " y " type simultaneously, and fundamentally solving upper face gas transfinites
And its a Gas Accumulation in Upper-Corner by Pulsed difficult problem.Up to the present, China done in terms of gob side entry retaining theoretical and technological studies substantial amounts of
Work, is gradually improved in the edge air gallery technology of condition preferable thin and medium seam coal-face, in roadside support, lane
Supporting, strengthening supporting and coal side reinforcement technique have become ripe, but in the difficult medium-thickness seam of condition or high seam compared with big cross section lane
In road, some technical barriers be there are still using edge air gallery technology.The big cross section edge of the such as condition such as longwall top coal caving, high working face
Kong Liu lane, face surrounding rock structure and the characteristics of motion and thin and medium seam have dramatically different, and acutely, ore deposit pressure is aobvious for its exploitation disturbance
Now strong, more easily cause gob side entry retaining roadside support structural damage unstability, especially roadside packing body of wall.
At present, mainly based on high-water material and concrete ointment material, supporting effect obtains significantly roadside packing body of wall
Degree improves.But in the condition big cross section gob side entry retaining such as longwall top coal caving, high working face, its overlying rock activity is violent, and roadside packing
Body of wall height is also larger, causes its structural stability relatively poor.A large amount of practice have shown that: gob side entry retaining roadside packing body of wall each
The roof behavior characteristics at position have more significantly to be distinguished, and roadside packing body of wall side middle and upper part pressure break slabbing phenomenon is serious, in
Bottom is larger to the amount of shifting near in lane.Even if the modes such as post, hydraulic prop being put using erection wood in lane nor effectively preventing
Roadside packing body of wall side large area pressure break slabbing, wood point post cleaves or fractures, hydraulic prop flexural deformation is serious, and then
Roadside packing body of wall bearing capacity is led to decline, easily induction roadside support structural deterioration unstability is so that some mines are big in application
Do not achieve the desired result during section edge air gallery technology, or even stay lane failure, thus limiting edge air gallery technology at me
State's broadly popularization and application.
Content of the invention
The purpose of the present invention is exactly the problem in order to overcome above-mentioned prior art to exist, and provides a kind of structure simple, stable
Property is good, and is applied to concrete filled steel tube roadside support system and the method for protecting support of big cross section gob side entry retaining.
For realizing the above-mentioned purpose of the present invention, the present invention provides a kind of concrete filled steel tube lane for big cross section gob side entry retaining
Collateral branch's protecting system, this system mainly include being close to the π section steel beam of top board, the concrete filled steel tube column of roof supporting π section steel beam,
It is enclosed within the elliptical ring base of concrete filled steel tube column bottom, the inclined hydraulic jack with elliptical ring base as hinged support, should
The very heavy distal end chip of inclined hydraulic is supported on the vertical π section steel beam and wire netting on filled wall surface.
Described concrete filled steel tube column includes 8 cun of steel pipes, 5 cun of steel pipes, rubber closure, fill concrete, vertical hydraulics thousand
Jin top, ring type pipe clamp.
Wherein, 8 cun of steel pipes and 5 cun of steel pipes are isometric, and, in 8 cun of steel pipes, two steel pipe axle center are identical for 5 cun of steel pipe sockets；At two ends
It is respectively welded 2～3 cross reinforcements and fixes two steel pipes, cross reinforcement one end is welded on 8 cun of steel pipe inner walls, the other end is welded on 5 cun
Outer wall of steel pipe, to fix two steel pipes；There are multiple ring type pipe clamps (preferably 2～4), ring type pipe clamp in 8 cun of steel pipe external stabilities
Between keep a determining deviation, the quantity of fixing ring type pipe clamp and spacing are according to depending on 8 cun of length of steel pipe；Apart from steel pipe one end
Rubber closure is installed in 5 cun of steel pipes of 0.3m, rubber closure diameter is mated with 5 cun of pipe diameters, for blocking 5 cun of steel pipes；Then exist
Fill concrete in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes is it is ensured that internal closely knit.
Wherein, described vertical hydraulic jack is arranged on concrete filled steel tube column upper end, its top cover and top board π shaped steel
Beam contacts, for roof supporting π section steel beam, no slip casting section in column casing insertion 5 cun of steel pipes of concrete filled steel tube column, and column casing external diameter
Match with 5 cun of pipe diameters, column casing inserts no will not wave after slip casting section in 5 cun of steel pipes and rocks.When head-room is larger,
Column casing can be risen makes top cover contact with top board π section steel beam；When head-room is less, it is possible to decrease column casing makes top cover and top board π
Section steel beam contacts, and to adapt to different head-room roof timberings, adjustable extent is in 0.3m.
Described support bar is the reinforcing bar of diameter 80mm, and two ends have draw-in groove respectively, draw-in groove is laid with circular hole, circular hole and bolt
Diameter matches, pass through for bolt and fix；Described ring type pipe clamp is circular steel plate, outside circular steel plate internal diameter and 8 cun of steel pipes
Footpath is mated, and can be fixed on 8 cun of steel pipes；Circular steel plate edge is provided with 4 and moves close to somebody's ear, move close to somebody's ear upper be all drilled with circular hole, be used for
Bolt passes through；Moving close to somebody's ear on circular steel plate can embed support bar two ends draw-in groove, and the circular hole on draw-in groove is moved close to somebody's ear with circular steel plate
Upper circular hole corresponds, then installation bolt can connect two root posts.
Described filled wall surface integral arrangement has wire netting, then erects along filled wall length direction at interval of a determining deviation
To a piece π section steel beam of arrangement, the vertical π section steel beam upper end on filled wall is hinged with top board π section steel beam, its spacing and
Concrete filled steel tube column spacing is identical, and vertical π shaped steel beam length is highly consistent with filled wall, is pressed on filled wall surface
On wire netting.
Described concrete filled steel tube column near filled wall side along tunnel move towards arrange two rows, array pitch=700 ×
500mm (can adjust according to concrete condition), and staggered step type arrangement, near body of wall side one row's column apart from filled wall
250mm, the top board π section steel beam being arranged on this row's column is in " fourth " font, vertical hydraulic jack top cover in two adjacent upright
It is supported on " fourth " font top board π section steel beam two ends, its 3rd end is hinged with the vertical π section steel beam upper end of filled wall；Away from
" one " font π section steel beam is all arranged between the farthest row's column of filled wall.
Described elliptical ring base sheath in this row steel tube concrete column bottom farther out apart from filled wall, and with tunnel bottom
Plate contacts；Described elliptical ring base includes elliptical ring chassis, tubulose termination, moves close to somebody's ear and bolt.Elliptical ring chassis outline is ellipse
Toroidal, Internal periphery is circle, and in transverse side, its diameter is mated arranged off-centre with 8 cun of outer diameter of steel pipes；Tubulose termination is
Short steel pipes, its internal diameter is mated with 8 cun of outer diameter of steel pipes；Being alignd with elliptical ring chassis upper inner wheel exterior feature in tubulose termination, and is welded on ellipse
On ring chassis, it is used for being inserted in concrete filled steel tube column；Described tubulose termination is welded with a pair and moves close to somebody's ear, and this moves close to somebody's ear to prolong along transverse
Reach this major axis opposite side, move close to somebody's ear on be provided with hole, the very heavy top/bottom part of described inclined hydraulic embeds this to centre of moving close to somebody's ear, described
Bolt passes through this hole to fix to moving close to somebody's ear with this, forms articulated structure, described inclined hydraulic jack other end inclined shore is in institute
State on the vertical π section steel beam on filled wall surface, when roof pressure is excessive, the downward compression of described filled wall, tilt
Hydraulic jack top ends can be rotated down, and to ensure there are enough support forces to filled wall, prevents filled wall pressure break piece
Luo Huoxiang shifts near in lane.Do not fix between column and elliptical ring base, under roof pressure effect, bottom pricked by concrete filled steel tube column
During, elliptical ring base is simultaneously unaffected.
Described support bar arrangement is, after being connected using support bar between the concrete filled steel tube column of same row,
Support bar is in same horizontal line；Because two row steel tube concrete columns are using staggered step type arrangement, two row's steel tube concretes
Between native column, support bar is then connected in horizontal oblique mode, thus formed being formed between every three concrete filled steel tube columns
An isosceles triangular structure, be all connected using the method between concrete filled steel tube column, ultimately form one stable
Truss structure with roof supporting.
The present invention also provides the method for protecting support of above-mentioned support system it is characterised in that comprising the following steps:
1) concrete filled steel tube column makes
Choose isometric 8 cun of steel pipes and 5 cun of steel pipes, in 8 cun of steel pipes, two steel pipe axle center are identical for wherein 5 cun steel pipe sockets；In steel
Pipe two ends are respectively welded 2～3 cross reinforcements and fix two steel pipes, and cross reinforcement one end is welded on 8 cun of steel pipe inner walls, and the other end welds
In 5 cun of outer wall of steel pipe, to fix two steel pipes；It is fixed with multiple ring type pipe clamps in 8 cun of outer surface of steel tube；Apart from steel pipe one end
Rubber closure is installed in 5 cun of steel pipes of 0.3m, this rubber closure diameter is mated with 5 cun of pipe diameters, for blocking 5 cun of steel pipes, then
Fill concrete in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes is it is ensured that inside is closely knit；
Wherein, the step of fill concrete is: 1. nearest one end of rubber closure in 5 cun of steel pipes of distance, first uses plastic sheeting
5 cun of steel pipe openings of closure, then block 8 cun of steel pipe openings with plastic sheeting it is ensured that not spillage liquid；2. steel pipe is tilted, wrap up one end court
Under, the other end upward, to guarantee that during slip casting, steel inner air tube is all discharged, and does not have bubble；3. by ready concrete slurry
Inject in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes by grouting pipe, after filling, wrap up envelope with plastic sheeting
The stifled other end, after concrete slurry solidification, takes plastic sheeting apart.It should be noted that concrete slurry reasonable mixture ratio, solidification
After can voluntarily closely knit, do not shrink, intensity is high, bleed, early strength be not high.Concrete filled steel tube column forms steel tube confined concrete
Structure, can significantly improve the stress of steel duct concrete, the intensity of raising concrete filled steel tube pillar, toughness, plasticity
And bending resistance and bearing capacity.
2) wire netting and vertical π section steel beam on laying filled wall
Described filled wall surface is integrally equipped with wire netting, then along filled wall length direction at interval of a determining deviation cloth
Put a vertical π section steel beam, π shaped steel beam length is highly consistent with filled wall, is pressed on filled wall surface metal net
(11)；
3) concrete filled steel tube column is laid
Described concrete filled steel tube column is being arranged as two rows near filled wall side along tunnel trend, and an array pitch is 700
× 500mm, staggered step type arrangement, near filled wall side one row's column apart from filled wall 250mm, it is arranged in this row and stands
Top board π section steel beam on post is in " fourth " font, and the vertical hydraulic jack top cover support in two adjacent upright is lived should " fourth " word
Shape top board π section steel beam two ends, its 3rd end is hinged with the vertical π section steel beam upper end of filled wall；Apart from filled wall
Remote row's column upper plate all arranges " one " font π section steel beam, by adjusting concrete filled steel tube column upper end vertical hydraulic thousand
It is ensured that it can be supported on top board π section steel beam, described vertical hydraulic jack column casing should insert steel pipe to the length on jin top
In 5 cun of steel pipes of concrete column no in slip casting section；
4) elliptical ring base is installed
By elliptical ring base sheath in a row steel tube concrete column bottom farther out apart from filled wall, and and roadway floor
Contact, column is fixed position under roof and floor pressure, and plays restriction fixation to elliptical ring base, but column and ellipse
Between base, no component is fixedly connected；
5) support bar is installed
All it is connected using support bar between described concrete filled steel tube column, connected mode is will to be fixed on steel pipe and mix
The moving close to somebody's ear in the draw-in groove of embedded support bar termination of ring type pipe clamp on solidifying soil column, then installation bolt is fixed, thus by two steel pipes
Concrete column connects together；Support bar arrangement is to adopt support bar to connect between the concrete filled steel tube column of same row
When fixing, support bar is in same horizontal line；When between two row steel tube concrete columns, support bar is connected, oblique with level
Friendship mode connects, thus forming the isosceles triangular structure that between every three concrete filled steel tube columns, support bar is formed, and
Ultimately form a stable truss structure；
6) inclined hydraulic jack is installed
The very heavy top/bottom part of described inclined hydraulic embeds in the moving close to somebody's ear for a pair of elliptical ring base, then installs bolt, forms hinge
Access node structure, this inclined hydraulic jack can rotate up and down, and its other end inclined shore is in the vertical π shaped steel on filled wall surface
Liang Shang；
Described concrete filled steel tube roadside support system should proceed by construction at the gob side entry retaining initial stage, and follows roadside packing closely
Body of wall.
The control principle of roadside support system: in gob side entry retaining top board initial stage, the truss being formed by concrete filled steel tube column
Structure and filled wall Collaborative Control are crushed deformation, and truss structure primarily serves support action to top board.In gob side entry retaining
The top board aggravating activities phase, roof pressure increases, and deflection increases.On the one hand, concrete filled steel tube column is pricked bottom and is allowed pressure, increase steel pipe
Concrete column is the most stable in the stability of vertical direction, especially concrete filled steel tube column bottom, then inclined hydraulic thousand
Jin pushes up with the elliptical ring base being enclosed within concrete filled steel tube column bottom as fulcrum, can apply larger active force and support filled wall
On π section steel beam.On the other hand, filled wall compression allows pressure, and bulk settling is supported on the liquid on filled wall π section steel beam
Pressure jack, with elliptical ring base as coercive mechanism, not only provides larger support force to filled wall π section steel beam, and can also be with
Filled wall compression sinking is rotated down, to adapt to filled wall bulk settling.Then, enter with big cross section gob side entry retaining top board
One step deformation, filled wall compression tends towards stability, and the deformation of its side surface is inclined by hydraulic jack top pressure π section steel beam and metal
Net is limited, and filled wall stress is enhanced, and now filled wall significantly increases to roof timbering effect, with steel tube concrete
Native truss structure Collaborative Control roof deformation；After surrouding rock deformation reaches certain state, steel pipe concrete truss structure and filling
Body of wall also all tends towards stability, and both ultimately form the other cooperative control system in effective lane.
Beneficial effect
After the completion of roadside support, at the roof deformation initial stage, the truss structure being formed by concrete filled steel tube column is to top board
Main support action, the stability of filled wall Collaborative Control top board, in the process concrete filled steel tube column prick bottom and allow pressure；It
Afterwards, deform further with big cross section gob side entry retaining top board, filled wall compression tends towards stability, and the deformation of its side surface is inclined by
Hydraulic jack, π section steel beam and wire netting are limited, and filled wall stress is enhanced, and now filled wall props up to top board
Shield effect significantly increases, with steel pipe concrete truss structure Collaborative Control roof deformation；After surrouding rock deformation reaches certain state,
Steel pipe concrete truss structure is also all tended towards stability with filled wall, and both ultimately form the other cooperative control system in effective lane.
Brief description
Fig. 1 is the front view that a kind of concrete filled steel tube roadside support system of the present invention is used for big cross section gob side entry retaining；
Fig. 2 is the top view in Fig. 1 along i-i direction；
Fig. 3 is concrete filled steel tube column schematic diagram；
Fig. 4 is the profile in ii-ii direction in Fig. 3；
Fig. 5 is that in Fig. 2, support bar is connected b-b schematic diagram with concrete filled steel tube column；
Fig. 6 is elliptical ring base a-a schematic diagram in Fig. 1；
Fig. 7 is the top view of Fig. 6；
Description of reference numerals: 1- tunnel；2- entity coal is helped；3- filled wall；4- back；5- concrete filled steel tube stands
Post；51-8 cun of steel pipe；52-5 cun of steel pipe；Rubber closure in 53-5 cun of steel pipe；The concrete of 54- filling；55- vertical hydraulic is very heavy
Top；56- ring type pipe clamp；The circular steel plate of 561-；Move close to somebody's ear on 562- ring type pipe clamp；563- moves close to somebody's ear upper circular hole；6- support bar；62-
Circular hole on support bar；7a- top board " one " font π section steel beam；7b- top board " fourth " font π section steel beam；8- inclined hydraulic is very heavy
Top；9- elliptical ring base；91- elliptical ring chassis；92- tubulose termination；93- elliptical ring base is moved close to somebody's ear；94- bolt；10- is close to fill
Fill out the vertical π section steel beam on body of wall；11- wire netting；
Specific embodiment
According to Fig. 1-Fig. 7, concrete filled steel tube roadside support system of the present invention mainly includes the π section steel beam being close to top board 4
7a, 7b, the concrete filled steel tube column 5 of roof supporting π section steel beam, be enclosed within concrete filled steel tube column 5 bottom elliptical ring base 9,
Inclined hydraulic jack 8 with elliptical ring base 9 as hinged support, this inclined hydraulic jack 8 termination is supported on filled wall 3
On the vertical π section steel beam 10 on surface and wire netting 11.
Described concrete filled steel tube column 5 includes 51,5 cun of steel pipes 52 of 8 cun of steel pipes, rubber closure 53, fill concrete 54, hangs down
Straight hydraulic jack 55, ring type pipe clamp 56.
Wherein, 8 cun of steel pipes 51 and 5 cun of steel pipes 52 are isometric, and 5 cun of steel pipes 52 are enclosed within 8 cun of steel pipes 51, two steel pipe axle center phases
With；It is respectively welded 2～3 cross reinforcements at two ends and fixes two steel pipes 51,52, cross reinforcement one end is welded on 8 cun of steel pipe 51 inwalls,
The other end is welded on 5 cun of steel pipe 52 outer walls, to fix two steel pipes；There are multiple ring type pipe clamps 56 in the external stability of 8 cun of steel pipes 51
(preferably 2～4), keep a determining deviation, the quantity of fixing ring type pipe clamp 56 and spacing are according to 8 cun of steel pipes between ring type pipe clamp 56
Depending on 51 length；Rubber closure 53, rubber closure 53 diameter and 5 cun of steel pipes are being installed in 5 cun of steel pipes 52 of steel pipe one end 0.3m
52 internal diameter couplings, for blocking 5 cun of steel pipes 52；Then in 5 cun of steel pipes 52 of the other end and 8 cun of steel pipes 51 and 5 cun of steel pipes 52 it
Between fill concrete 54 it is ensured that internal closely knit.
Wherein, described vertical hydraulic jack 55 is arranged on concrete filled steel tube column 5 upper end, its top cover and top board π type
Girder steel 7a, 7b contact, for roof supporting π section steel beam, no slip casting section in column casing insertion 5 cun of steel pipes 52 of concrete filled steel tube column,
Column casing external diameter is matched with 5 cun of steel pipe 52 internal diameters, and column casing inserts no will not wave after slip casting section in 5 cun of steel pipes 52 and rocks.Work as lane
When road is highly larger, can rise column casing makes top cover contact with top board π section steel beam 7a, 7b；When head-room is less, it is possible to decrease
Column casing makes top cover contact with top board π section steel beam 7a, 7b, and to adapt to different head-room roof timberings, adjustable extent is in 0.3m
Interior.
Described support bar 6 is the reinforcing bar of diameter 80mm, and two ends have draw-in groove respectively, draw-in groove is laid with circular hole 62, circular hole 62
Mate with the diameter of bolt, pass through for bolt and fix；Described ring type pipe clamp 56 includes circular steel plate 561, circular steel plate 561
Internal diameter is mated with 8 cun of steel pipe 51 external diameters, can be fixed on 8 cun of steel pipes 51；Circular steel plate 561 edge is provided with 4 and moves close to somebody's ear
562, move close to somebody's ear upper be all drilled with circular hole 563, pass through for bolt；Moving close to somebody's ear on circular steel plate 561 562 can embed 6 liang of support bar
End draw-in groove, the circular hole 62 on draw-in groove and circular steel plate upper circular hole 563 of moving close to somebody's ear corresponds, then installation bolt can connect two vertical
Post 5.
Described filled wall 3 surface integral arrangement has wire netting 11, then along filled wall 3 length direction at interval of between certain
Away from being vertically arranged a π section steel beam 10, vertical π section steel beam 10 upper end on filled wall 3 and " fourth " font top board π type
Girder steel 7b is hinged, and its spacing is identical with concrete filled steel tube column 5 spacing, and vertical π section steel beam 10 length is with filled wall 3 highly
Unanimously, it is pressed on filled wall 3 surface metal net 11.
Described concrete filled steel tube column 5 near filled wall 3 side along tunnel 1 move towards arrange two rows, array pitch=700 ×
500mm (can adjust according to concrete condition), staggered step type arrangement, near body of wall side one row's column apart from filled wall 3 is
250mm, the top board π section steel beam 7b being arranged on this row's column is in " fourth " font, vertical hydraulic jack 55 in two adjacent upright
Top cover support at " fourth " font top board π section steel beam 7b two ends, vertical π section steel beam 10 upper end of its 3rd end and filled wall 3
Hinged；" one " font π section steel beam 7a is all arranged between the farthest row's column of filled wall 3.
Described elliptical ring base 9 is enclosed within this row steel tube concrete column 5 bottom farther out apart from filled wall 3, and and lane
Road contacts baseplate；Described elliptical ring base 9 includes elliptical ring chassis 91, tubulose termination 92, move close to somebody's ear 93 and bolt 94.Elliptical ring bottom
Disk 91 outline be elliptical shape, Internal periphery be circle, arranged off-centre in transverse side, outside its diameter and 8 cun of steel pipes 51
Footpath is mated；Tubulose termination 92 is short steel pipes, and its internal diameter is mated with 8 cun of steel pipe 51 external diameters；Tubulose termination 92 and elliptical ring chassis 91
The wide alignment of upper inner wheel, and be welded on elliptical ring chassis 91, it is used for being inserted in concrete filled steel tube column 5；Described tubulose termination 92 is welded
It is connected to a pair and moves close to somebody's ear 93, this moves close to somebody's ear 93 to extend to this major axis opposite side along transverse, move close to somebody's ear to be provided with hole on 93, described incline
Tiltedly hydraulic jack 8 bottom embeds this to moving close to somebody's ear in the middle of 93, and described bolt 94 passes through this hole 93 fixing to moving close to somebody's ear with this, forms hinge
Access node structure, the vertical π section steel beam 10 on described filled wall 3 surface for described inclined hydraulic jack 8 other end inclined shore
On, when top board 4 pressure is excessive, the downward compression of described filled wall 3, inclined hydraulic jack 8 end can be to backspin
Turn, to ensure there are enough support forces to filled wall 3, prevent filled wall 3 pressure break slabbing or shift near into lane.Column 5 with
Do not fix between elliptical ring base 9, under roof pressure effect, during bottom pricked by concrete filled steel tube column 5, elliptical ring base 9
And it is unaffected.
Described support bar 6 arrangement is to be connected using support bar 6 between the concrete filled steel tube column 5 of same row
When, support bar 6 is in same horizontal line；Because two row steel tube concrete column 5 is using staggered step type arrangement, two row's steel pipes
Between concrete column 5, support bar 6 is then connected in horizontal oblique mode, thus formed every three concrete filled steel tube columns it
Between formed an isosceles triangular structure, be all connected using which between concrete filled steel tube column 5, ultimately form one
Individual stable truss structure is with roof supporting 4.
The method for protecting support of the concrete filled steel tube roadside support system of the present invention includes step in detail below:
1) making of concrete filled steel tube column 5
Intercept isometric 8 cun of steel pipes 51 and 52,5 cun of steel pipes 52 of 5 cun of steel pipes are enclosed within 8 cun of steel pipes 51, two steel pipe axle center phases
With；Weld 2～3 cross reinforcements at two ends and fix two steel pipes, cross reinforcement one end is welded on 8 cun of steel pipe 51 inwalls, the other end welds
It is connected on 5 cun of steel pipe 52 outer walls, to fix two steel pipes；In the multiple ring type pipe clamp of 8 cun of steel pipes 51 external stability 56 (preferably 2～4
Individual), keep a determining deviation between ring type pipe clamp 56, be welded on 8 cun of steel pipes 51, the quantity and spacing of fixing ring type pipe clamp 56 according to
Depending on 8 cun of steel pipe 51 length；Rubber closure 53, rubber closure 53 diameter are being installed in 5 cun of steel pipes 52 of steel pipe one end 0.3m
Mate with 5 cun of steel pipe 52 internal diameters, for blocking 5 cun of steel pipes 52；Then in 5 cun of steel pipes 52 of the other end and 8 cun of steel pipes 51 and 5 cun
Fill concrete 54 between steel pipe 52 is it is ensured that inside is closely knit.
Particularly, the step of fill concrete is: 1. nearest one end of rubber closure 53 in 5 cun of steel pipes 52 of distance, first with moulding
Material thin film blocks 52 mouthfuls of 5 cun of steel pipes, then blocks 51 mouthfuls of 8 cun of steel pipes with plastic sheeting it is ensured that not spillage liquid；2. steel pipe is tilted,
Parcel one end down, the other end upward, to guarantee that during slip casting, steel inner air tube is all discharged, and does not have bubble；3. will be ready
Concrete slurry is injected in 5 cun of steel pipes of the other end 52 and between 8 cun of steel pipes 51 and 5 cun of steel pipes 52 by Grouting Pipe, uses after filling
The plastic sheeting parcel closure other end, after concrete slurry solidification, takes plastic sheeting apart.It should be noted that concrete grout
Liquid reasonable mixture ratio, after solidification can voluntarily closely knit, do not shrink, intensity is high, bleed, early strength be not high.
2) wire netting 11 on laying filled wall 3 and vertical π section steel beam 10
Described filled wall 3 surface is integrally equipped with wire netting 11, then along filled wall 3 length direction at interval of between certain
Away from a piece vertical π section steel beam 10 of arrangement, its spacing is identical with concrete filled steel tube column 5 spacing, π section steel beam 10 length and filling
Body of wall 3 is highly consistent, is pressed on filled wall 3 surface metal net 11.
3) concrete filled steel tube column 5 is laid
Described concrete filled steel tube column 5 near filled wall 3 side along tunnel 1 move towards arrange two rows, array pitch=700 ×
500mm (can adjust according to concrete condition), and alternating expression is arranged, near filled wall 3 side one row's column 5) apart from filled wall 3
For 250mm, the top board π section steel beam 7b being disposed thereon is in " fourth " font, vertical hydraulic jack 55 top cover support on two columns
At the π section steel beam 7b two ends of top board, the 3rd end is hinged with vertical π section steel beam 10 upper end of filled wall 3；Apart from filling wall
" one " font π section steel beam 7a is all arranged between the farthest row's column of body.Vertical by adjusting concrete filled steel tube column 5 upper end
Hydraulic jack 55 length is it is ensured that it can be supported on the hinged π section steel beam of the π type of top board 4.
Vertical hydraulic jack 55 is arranged in the nearest one end of rubber closure 53 no slip casting section in 5 cun of steel pipes 52 of distance, will
The column casing of vertical hydraulic jack 55 is inserted directly into no slip casting section, and column casing external diameter is matched with 5 cun of steel pipe 52 internal diameters, inserts 5 cun
No will not wave after slip casting section in steel pipe and rock；When head-room is larger, can rise column casing makes top cover and top board π section steel beam
Contact；When head-room is less, it is possible to decrease plunger tube makes top cover contact with top board π section steel beam, high to adapt to different tunnels 1
Degree top board 4 supporting, adjustable extent is in 0.3m.
4) elliptical ring base 9 is installed
Elliptical ring base 9 is enclosed within a row steel tube concrete column 5 bottom farther out apart from filled wall 3, and with tunnel 1
Contacts baseplate, column is fixed position under roof and floor pressure, and plays restriction fixation to elliptical ring base, but column with ellipse
Between cup dolly, no component is fixedly connected；Roof pressure effect under, described concrete filled steel tube 5 column prick bottom during,
Described elliptical ring base is unaffected.
5) support bar 6 is installed
All it is connected using support bar 6 between described concrete filled steel tube column 5, connected mode is to be fixed on steel pipe
Ring type pipe clamp 56 on concrete column 5 is moved close to somebody's ear in 562 embedded support bar 6 termination draw-in grooves, then installation bolt is fixed, thus two
Root concrete filled steel tube column 5 connects together；Described support bar 6 arrangement: adopt between the concrete filled steel tube column 5 of same row
When support bar 6 is fixing, support bar 5 is in same horizontal line；Between two row steel tube concrete columns 5, support bar 6 is oblique with level
Friendship mode overlaps fixation, thus forming the isosceles triangular structure that every three concrete filled steel tube columns 5 are formed, steel tube concrete
All it is connected using this arrangement between native column 5, ultimately form steel pipe concrete truss structure.
6) inclined hydraulic jack 8 is installed
What described inclined hydraulic jack 8 bottom embedded elliptical ring base 9 moves close to somebody's ear for a pair in 93, then installs bolt 94,
Form articulated structure, this inclined hydraulic jack 8 can rotate up and down, its other end inclined shore is perpendicular on filled wall 3 surface
To on π section steel beam 10；
Described concrete filled steel tube roadside support system should proceed by construction at the gob side entry retaining initial stage, and follows roadside packing closely
Body of wall.
Claims (6)
1. a kind of concrete filled steel tube roadside support system for big cross section gob side entry retaining is it is characterised in that this system is mainly wrapped
Include and be close to the π section steel beam of top board, the concrete filled steel tube column of roof supporting π section steel beam, be enclosed within concrete filled steel tube column bottom
Elliptical ring base, the inclined hydraulic jack with elliptical ring base as hinged support, the very heavy distal end chip of this inclined hydraulic support
On the vertical π section steel beam and wire netting on filled wall surface；
Described concrete filled steel tube column includes isometric 8 cun steel pipe and 5 cun of steel pipes, 5 cun of steel pipe sockets in 8 cun of steel pipes, two steel pipes
Axle center is identical；It is respectively welded 2～3 cross reinforcements at steel pipe two ends and fixes two steel pipes, cross reinforcement one end is welded in 8 cun of steel pipes
Wall, the other end is welded on 5 cun of outer wall of steel pipe, to fix two steel pipes；It is fixed with multiple ring type pipe clamps in 8 cun of outer surface of steel tube；
In 5 cun of steel pipes of steel pipe one end 0.3m, rubber closure is being installed, this rubber closure diameter is mated with 5 cun of pipe diameters, for blocking up
5 cun of steel pipes of plug, then in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes fill concrete it is ensured that internal closely knit；
Described concrete filled steel tube column upper end is provided with vertical hydraulic jack, and its top cover is contacted with top board π section steel beam, uses
In roof supporting π section steel beam, no slip casting section in its column casing insertion 5 cun of steel pipes of concrete filled steel tube column, this column casing external diameter and 5 cun
Pipe diameter matches, and ensures that column casing inserts no will not wave after slip casting section in 5 cun of steel pipes and rock；
Described concrete filled steel tube column near filled wall side along tunnel trend be arranged as two rows, an array pitch be 700 ×
500mm, staggered step type arrangement；Near filled wall side row's column apart from filled wall 250mm, be arranged in this row stand
Top board π section steel beam on post is in " fourth " font, and two adjacent upright upper end vertical hydraulic jack top cover support is on " fourth " font top
Plate π section steel beam two ends, its 3rd end is hinged with the vertical π section steel beam upper end of filled wall；Farthest apart from filled wall
One row's column upper plate all arranges " one " font π section steel beam；
All it is connected using support bar between described concrete filled steel tube column, described ring type pipe clamp is circular steel plate, its side
Edge is provided with 4 and moves close to somebody's ear, move close to somebody's ear upper be all drilled with circular hole, pass through for bolt, the moving close to somebody's ear of circular steel plate edge can embed described
The draw-in groove at support bar two ends, and installation bolt fixes, thus two concrete filled steel tube columns are linked together；
Wherein, described filled wall surface is integrally equipped with wire netting, then along filled wall length direction at interval of a determining deviation
It is vertically arranged a π section steel beam, the upper end on filled wall is hinged with the π section steel beam of top board, vertical π shaped steel case bay
Identical with concrete filled steel tube column spacing, vertical π shaped steel beam length is highly consistent with filled wall, and is pressed on filled wall
Surface metal is online；
Described elliptical ring base sheath is in this row steel tube concrete column bottom farther out apart from filled wall, and connects with roadway floor
Touch；Described elliptical ring base includes elliptical ring chassis, tubulose termination, moves close to somebody's ear and bolt；Elliptical ring chassis outline is ellipse
Shape, Internal periphery is circular and arranged off-centre is in transverse side, and its diameter is mated with 8 cun of outer diameter of steel pipes；Tubulose termination is short
Steel pipe, its internal diameter is mated with 8 cun of outer diameter of steel pipes, and being alignd with elliptical ring chassis upper inner wheel exterior feature in tubulose termination, and is welded on elliptical ring
On chassis, it is used for being inserted in concrete filled steel tube column；Described tubulose termination is welded with a pair and moves close to somebody's ear, and this moves close to somebody's ear to extend along transverse
To this major axis opposite side, move close to somebody's ear on be provided with hole, the very heavy top/bottom part of described inclined hydraulic embeds this to centre of moving close to somebody's ear, described spiral shell
Bolt passes through this hole to fix to moving close to somebody's ear with this, forms articulated structure, described inclined hydraulic jack other end inclined shore is described
On the vertical π section steel beam on filled wall surface, when roof pressure is excessive, the downward compression of described filled wall, tilt liquid
Pressure jack end can be rotated down, and to ensure there are enough support forces to filled wall, prevents filled wall pressure break slabbing
Or shift near into lane.
2. concrete filled steel tube roadside support system according to claim 1 is it is characterised in that described concrete filled steel tube column
Do not fix and described elliptical ring base between, roof pressure effect under, described concrete filled steel tube column prick bottom during, institute
State elliptical ring base unaffected.
3. concrete filled steel tube roadside support system according to claim 2 it is characterised in that the plurality of ring type pipe clamp it
Between keep a determining deviation, the quantity of the plurality of ring type pipe clamp and spacing are according to depending on 8 cun of length of steel pipe.
4. concrete filled steel tube roadside support system according to claim 3 is it is characterised in that pass through described vertical hydraulic thousand
Jin fore-set cylinder stretches, and to adapt to the roof timbering of different head-rooms, flexible adjustable extent is within 0.3m.
5. concrete filled steel tube roadside support system according to claim 4 is it is characterised in that described support bar arrangement
For: when being connected using support bar between the concrete filled steel tube column of same row, support bar is in same horizontal line；Due to
Using staggered step type arrangement between two row steel tube concrete columns, between two row steel tube concrete columns, support bar is connected
When, connected in horizontal oblique mode, thus forming the isosceles three that between every three concrete filled steel tube columns, support bar is formed
Angular structure, and ultimately form a stable truss structure.
6. the method for protecting support of concrete filled steel tube roadside support system as claimed in claim 5 is it is characterised in that include following walking
Rapid:
1) concrete filled steel tube column makes
Choose isometric 8 cun of steel pipes and 5 cun of steel pipes, in 8 cun of steel pipes, two steel pipe axle center are identical for wherein 5 cun steel pipe sockets；In steel pipe two
End is respectively welded 2～3 cross reinforcements and fixes two steel pipes, and cross reinforcement one end is welded on 8 cun of steel pipe inner walls, and the other end is welded on 5
Very little outer wall of steel pipe, to fix two steel pipes；It is fixed with multiple ring type pipe clamps in 8 cun of outer surface of steel tube；Apart from steel pipe one end
Rubber closure is installed in 5 cun of steel pipes of 0.3m, this rubber closure diameter is mated with 5 cun of pipe diameters, for blocking 5 cun of steel pipes, then
Fill concrete in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes is it is ensured that inside is closely knit；
The step of described fill concrete is: 1. nearest one end of rubber closure in 5 cun of steel pipes of distance, first blocks 5 with plastic sheeting
Very little steel pipe opening, then block 8 cun of steel pipe openings with plastic sheeting it is ensured that not spillage liquid；2. steel pipe is tilted, wrap up one end down, separately
One end upward, to guarantee that during slip casting, steel inner air tube is all discharged, and does not have bubble；3. ready concrete slurry is passed through note
Slurry conduit injects in 5 cun of steel pipes of the other end and between 8 cun of steel pipes and 5 cun of steel pipes, another with plastic sheeting parcel closure after filling
One end, after concrete slurry solidification, takes plastic sheeting apart；
2) wire netting and vertical π section steel beam on laying filled wall
Described filled wall surface is integrally equipped with wire netting, then arranges one along filled wall length direction at interval of a determining deviation
Root vertical π section steel beam, π shaped steel beam length is highly consistent with filled wall, is pressed on filled wall surface metal net (11)；
3) concrete filled steel tube column is laid
Described concrete filled steel tube column near filled wall side along tunnel trend be arranged as two rows, an array pitch be 700 ×
500mm, staggered step type arrangement, near filled wall side one row's column apart from filled wall 250mm, it is arranged in this row's column
On top board π section steel beam be in " fourth " font, the vertical hydraulic jack top cover support in two adjacent upright is lived should " fourth " font
Top board π section steel beam two ends, its 3rd end is hinged with the vertical π section steel beam upper end of filled wall；Farthest apart from filled wall
Row's column upper plate all arrange " one " font π section steel beam, very heavy by adjusting concrete filled steel tube column upper end vertical hydraulic
It is ensured that it can be supported on top board π section steel beam, described vertical hydraulic jack column casing should insert steel pipe and mix the length on top
In solidifying soil 5 cun of steel pipes of column no in slip casting section；
4) elliptical ring base is installed
By elliptical ring base sheath in a row steel tube concrete column bottom farther out apart from filled wall, and connect with roadway floor
Touch, column is fixed position under roof and floor pressure, and plays restriction fixation to elliptical ring base, but column and oval bottom
Between seat, no component is fixedly connected；
5) support bar is installed
All it is connected using support bar between described concrete filled steel tube column, connected mode is to be fixed on concrete filled steel tube
The moving close to somebody's ear in the draw-in groove of embedded support bar termination of ring type pipe clamp on column, then installation bolt is fixed, thus by two steel tube concretes
Native column connects together；Support bar arrangement is to be connected using support bar between the concrete filled steel tube column of same row
When, support bar is in same horizontal line；When between two row steel tube concrete columns, support bar is connected, with horizontal oblique side
Formula connects, thus forming the isosceles triangular structure that between every three concrete filled steel tube columns, support bar is formed, and finally
Form a stable truss structure；
6) inclined hydraulic jack is installed
The very heavy top/bottom part of described inclined hydraulic embeds in the moving close to somebody's ear for a pair of elliptical ring base, then installs bolt, forms hinged knot
Structure, this inclined hydraulic jack can rotate up and down, and its other end inclined shore is on the vertical π section steel beam on filled wall surface；
Described concrete filled steel tube roadside support system should proceed by construction at the gob side entry retaining initial stage, and follows roadside packing wall closely
Body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510184878.XA CN104832188B (en) | 2015-04-17 | 2015-04-17 | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
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| CN201510184878.XA CN104832188B (en) | 2015-04-17 | 2015-04-17 | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
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| CN106677804B (en) * | 2017-02-23 | 2019-03-29 | 山东建筑大学 | A kind of gob side entry retaining roadside support system and its construction method |
| CN107829762B (en) * | 2017-10-31 | 2023-11-10 | 中国矿业大学(北京) | Self-adaptive support pier column and support method thereof |
| CN108194141B (en) * | 2017-12-28 | 2019-03-29 | 乌海市天裕工贸有限公司 | Mouth block wall under a kind of coal mine offset |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720498A (en) * | 2012-06-20 | 2012-10-10 | 鄂托克前旗长城煤矿有限责任公司 | Gob-side entry retaining mining process for coal face |
| CN103485801A (en) * | 2013-08-26 | 2014-01-01 | 中国矿业大学(北京) | Roadway support device for dynamic pressure roadway and retaining roadway along goaf |
| CN203730069U (en) * | 2014-01-09 | 2014-07-23 | 中国矿业大学 | Round concrete filled steel tubular column gob-side entry retaining filling wall body structure |
| CN204609898U (en) * | 2015-04-17 | 2015-09-02 | 中国矿业大学(北京) | A kind of concrete filled steel tube roadside support system for big cross section gob side entry retaining |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11159287A (en) * | 1997-11-25 | 1999-06-15 | Toyo Technos:Kk | Concrete pipe for semi-shield method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720498A (en) * | 2012-06-20 | 2012-10-10 | 鄂托克前旗长城煤矿有限责任公司 | Gob-side entry retaining mining process for coal face |
| CN103485801A (en) * | 2013-08-26 | 2014-01-01 | 中国矿业大学(北京) | Roadway support device for dynamic pressure roadway and retaining roadway along goaf |
| CN203730069U (en) * | 2014-01-09 | 2014-07-23 | 中国矿业大学 | Round concrete filled steel tubular column gob-side entry retaining filling wall body structure |
| CN204609898U (en) * | 2015-04-17 | 2015-09-02 | 中国矿业大学(北京) | A kind of concrete filled steel tube roadside support system for big cross section gob side entry retaining |
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