CN106677804A - Gob-side entry retaining roadside support system and construction method thereof - Google Patents
Gob-side entry retaining roadside support system and construction method thereof Download PDFInfo
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- CN106677804A CN106677804A CN201710100400.3A CN201710100400A CN106677804A CN 106677804 A CN106677804 A CN 106677804A CN 201710100400 A CN201710100400 A CN 201710100400A CN 106677804 A CN106677804 A CN 106677804A
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- 238000010276 construction Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 327
- 239000010959 steel Substances 0.000 claims abstract description 327
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 5
- 230000002787 reinforcement Effects 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000010412 perfusion Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 210000005069 ears Anatomy 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008093 supporting effect Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 abstract 3
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003245 working effect Effects 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- 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
- E21D11/04—Lining with building materials
- E21D11/12—Temporary supports for use during building; Accessories
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a gob-side entry retaining roadside support system and a construction method thereof. A rhombic steel bar net is arranged on one side of a gob, an air drum cloth is laid on the inner side of the rhombic steel bar net, light aggregate concrete is adopted to perform guniting treatment on the air drum cloth and the rhombic steel bar net, a windtight light aggregate concrete spray layer is formed on the side of the gob, the thickness of the light aggregate concrete spray layer is 200-500 mm, and the other side of the light aggregate concrete spray layer is close to a steel tube concrete pier stud supporting device. A steel tube concrete pier stud is formed by filling an empty steel tube with concrete; through a restraint effect of a steel tube casing, internal concrete is in a three-dimensional stressed state, the geometrical stability of the steel tube wall is enhanced, and the bearing capacity of the steel tube concrete pier stud is improved. According to the gob-side entry retaining roadside support system, a top plate can be supported in high strength, coal mining efficiency is effectively improved, and an operation environment in a roadway is improved; the steel tube concrete pier stud can be recycled through a special thrust device, and the roadway retained cost is reduced.
Description
Technical field
The present invention relates to a kind of gob side entry retaining roadside support system and its construction method, and in particular to a kind of recyclable steel pipe
The gob side entry retaining roadside support system of performance of concrete column confined and its construction method, belong to the gob side entry retaining field of deep-well medium-thickness seam.
Background technology
Gob side entry retaining is to safeguard used stope drift active workings along gob edge at work surface rear, and for next
Section seam mining service, the technology can realize Y type draft types, improve coal resources recovery ratio, reduce tunnelling amount,
Alleviate excavation replacement contradiction, prevent island working face from producing, shorten moving time, to improving mine economic benefit and mine safety
Production is extremely advantageous.
At present conventional edge air gallery technology includes masonry shield lane (pack wall and concrete block wall etc.), obturator shield
Lane (the pumping filling of high percentage of water rapid solidifying material, ointment material, fast hardening concrete and soft mould), concrete filled steel tube pier stud add pack wall to protect lane
With the technology such as Qie Dingcheng lanes.Masonry shield lane technical costss are low, but Lack of support, high labor intensive or sealing effect are poor；Fill
Tian Tihu lanes have that setting rate is fast, early strength is good, closed goaf effect is good, mechanization degree is high, labor intensity is low
Feature, but there are problems that support force deficiency, filling cost；Concrete filled steel tube pier stud+pack wall shield lane technical support power height,
Stay lane effect good, but have that pier stud bending resistance effect is poor, high or steel pipe of building pack wall labor intensity by laying bricks or stones it is not recyclable caused by cost
High the problems such as；Qie Dingcheng lanes technical costss are low, supporting effect is good, but top board geological conditions is had high demands, otherwise overall to cut top effect
Fruit or to be caving into lane effect poor.
The content of the invention
For problem above, the present invention proposes a kind of gob side entry retaining roadside support system and its construction method, specifically relates to
And a kind of gob-side entry retaining support system that lane is protected based on solid matter bending-resistant type concrete filled steel tube pier stud, the present invention adopts concrete filled steel tube
Pier stud and light-weight aggregate flexible concrete spray coating construct roadside support body, and roadside support body can quickly be cut and push up and ensure that it is stablized
Property, with supporting intensity it is high, anti-bending strength is good, the recyclable recycling of pier stud steel pipe the characteristics of.The present invention is suitable for deep-well
High seam, efficiently solves that a deep-well medium-thickness seam edge air gallery technology difficult problem, i.e. roadside support body be vertical and level is to bearing capacity
The not enough and high problem of support cost.Technical scheme is as follows：
A kind of gob side entry retaining roadside support system, including concrete filled steel tube pier stud support meanss, light-weight aggregate flexible concrete
Spray-up, air duct fabric and rhombus bar-mat reinforcement, along goaf side rhombus bar-mat reinforcement is arranged, and air duct fabric is laid in rhombus bar-mat reinforcement inner side,
Whitewashing process is carried out using light aggregate concrete to air duct fabric and rhombus bar-mat reinforcement, in goaf side airfast light-weight aggregate is formed
Concrete spray coating, the thickness of light aggregate concrete spray-up is 200mm-500mm, and the opposite side of light aggregate concrete spray-up abuts steel
Pipe concrete pier stud support meanss；
The concrete filled steel tube pier stud support meanss include concrete filled steel tube pier stud, pier stud footwear plate, pier stud top cap and bending resistance
Round steel, bending resistance round steel point is welded in the side of concrete filled steel tube pier stud, and top is provided with the pier stud top cap of 200-300mm height, bottom
Be connected with pier stud footwear plate, concrete filled steel tube pier stud include pier stud steel pipe, pier stud pouring concrete within steel pipe, pier stud steel pipe it is upper
Portion, bottom are provided with two cylinder lever connecting rods, and bottom is provided with grouting port, and the pier stud top cap includes two kinds of forms：Steel pipe type pier stud top
Cap and bowl fastening type pier stud top cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles steel pipe pier capital end, and top cap is used
Closure steel plate closure, is provided with flexible cushion inside steel pipe type pier stud top cap, the thickness of the flexible cushion is 150-250mm；Institute
It is wooden unit bed course or rubber spacer to state flexible cushion, to realize the slow pressure effect to concrete filled steel tube pier stud；
Bowl fastening type pier stud top cap, is formed by two flat the rim of a bowl shape steel plates are with bolts, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the truncated cone-shaped is flat to be enclosed within steel pipe pier capital end, the top of the bowl fastening type pier stud top cap with it is pre-
Stay back to contact, the bowl fastening type steel plate is hollow structure, with certain compression deformation ability, therefore realize that steel pipe is mixed
The contractibility of solidifying knoll post；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate is provided with four ears, and by ear spiral shell is utilized
Bolt connects two flat the rim of a bowl shape steel plates.
Include footwear slab plate on pier stud footwear plate, arc plate is welded on footwear slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud
The base that bottom is engaged, each footwear slab plate is provided with 3 bases, and the thickness of footwear slab plate is 8-20mm, concrete filled steel tube
Pier stud is bolted with arc plate, is connected by cylinder lever connecting rod between concrete filled steel tube pier stud；The cylinder lever connecting rod is pull bar
Steel pipe, concrete perfusion is formed in pipe.
The line space of the concrete filled steel tube pier stud is 0.6-1m.
The concrete filled steel tube pier stud is threadedly coupled with pier stud top cap.
The composition of the light aggregate concrete is (kg/m3)：Cement 450, haydite 650, sand 650, breeze 50, water 125, subtract
Water preparation 3；The strength grade of light aggregate concrete is CL50, and apparent density is 800-1000kg/m3。
The construction method of gob side entry retaining roadside support system：
(1) first in ground processing and fabricating sky steel pipe pier stud shaft, pier stud top cap and pier stud footwear plate, concrete filled steel tube pier stud
Top outer is processed into screw thread mouth, and bottom is provided with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) edge in the goaf side in reserved tunnel hangs rhombus bar-mat reinforcement and air duct fabric, and mixed using light-weight aggregate
Solidifying soil carries out whitewashing process, and in the goaf side airfast light aggregate concrete spray-up is formed, by goaf sealing,
The light aggregate concrete jetting thickness is 200mm-500mm；
(3) empty steel pipe pier stud is set up against light aggregate concrete spray-up in the goaf side in reserved tunnel, steel pipe pier stud sets
Put on pier stud footwear plate, steel pipe pier stud installs a row or two rows, and the array pitch of adjacent two rows steel pipe pier stud is 0.6-1m, often arranges steel pipe
The adjacent pier stud spacing of pier stud is 0.6-1m, is connected by cylinder lever connecting rod between adjacent pier stud, to increase concrete filled steel tube pier stud
The stability of watch box system.It is high that steel pipe pier stud (i.e. concrete filled steel tube pier stud) arranges 200-300mm and the top board in reserved tunnel between
The pier stud top cap of degree, pier stud top cap is divided into two kinds：Steel pipe type pier stud top cap and bowl fastening type pier stud top cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles steel pipe pier capital end, and top cap is used
Steel plate is blocked, and flexible cushion is provided with inside steel pipe type pier stud top cap, and the thickness of the flexible cushion is 150-250mm；It is described soft
Property bed course be wooden unit bed course or rubber spacer, to realize the slow pressure effect to concrete filled steel tube pier stud；
Bowl fastening type pier stud top cap, is formed by two flat the rim of a bowl shape steel plates are with bolts, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the truncated cone-shaped is flat to be enclosed within steel pipe pier capital end, top and the reserved lane of the bowl fastening type steel plate
Road top plate contact, the bowl fastening type pier stud top cap is hollow structure, with certain compression deformation ability, therefore realizes that steel pipe is mixed
The contractibility of solidifying knoll post；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate is provided with four ears, and by ear spiral shell is utilized
Bolt connects two flat the rim of a bowl shape steel plates.
Pier stud footwear plate includes footwear slab plate, and arc plate is welded on footwear slab plate, and 4 arc plates are constituted and concrete filled steel tube pier stud bottom
The base that portion is engaged, each footwear slab plate is provided with 3 bases, and the thickness of footwear slab plate is 8-20mm, steel tube concrete knoll
Post is bolted with arc plate, is connected by cylinder lever connecting rod between concrete filled steel tube pier stud；The cylinder lever connecting rod is pull bar steel
Pipe, concrete perfusion is formed in pipe.
(4) after empty steel pipe pier stud certain amount to be installed, using jack-block, filled to the inside of empty steel pipe pier stud by grouting port
Note fast hardening concrete, carries out side outside steel pipe and shakes, to ensure the closely knit of concrete after the concrete for often noting 50cm with vibrating spear
Degree, to concrete and capital in same level；Fast hardening concrete 1d can be carried, and 3d can reach normal concrete 14d intensity, 7d
Can reach normal concrete 28d intensity.
The steel pipe material of pier stud steel pipe can select Q235, Q345, Q390, Q420 steel in the present invention, and outer diameter of steel pipes is
168-325mm, thickness of steel pipe is 6-16mm.
Concrete filled steel tube pier stud is recyclable, and its recovery method has two kinds：One is to adopt rig, bores broken core concrete, is struck
Hit steel pipe outside and shake and tube wall concrete and topple over, realize that steel pipe is reclaimed；Two is to adopt to be exclusively used in pushing away for concrete filled steel tube pier stud
Power machine, core concrete is released, and leaves sky steel pipe, realizes reclaiming.Based on the method for above-mentioned gob side entry retaining, present invention additionally comprises
A kind of thrust device for being exclusively used in concrete filled steel tube pier stud.At present, Inner Mongol Great Wall ore deposit has realized gob side entry retaining concrete filled steel tube
The recycling of pier stud, the ore deposit withdraws onsite application small-sized hydraulic rig in concrete filled steel tube pier stud, when core concrete is removed
Between be that, per root 30 minutes, and the present invention can make the core concrete of steel pipe pier stud remove the time to be reduced to every 10-15 minute, greatly
The removal efficiency of core concrete is improve greatly.
A kind of thrust device for being exclusively used in concrete filled steel tube pier stud, including concrete filled steel tube pier stud fixing device and thrust machine
Device；
The concrete filled steel tube pier stud fixing device includes steel pipe pier stud fixed mount and round clasp, and the steel pipe pier stud is consolidated
Determining frame is welded by steel I-beam and steel channel beam, and the steel I-beam is provided with High-strength bolt hole, for connecting thrust machine
Device, the round clasp is used to fix concrete filled steel tube pier stud, the appropriate pivot pin for adjusting round clasp, you can adapt to different shaped
Number concrete filled steel tube pier stud, the round clasp is welded on steel channel beam, and is welded with steel plate as shield in round clasp sidepiece
Wing steel plate, for strengthening the bearing capacity of round clasp；
Thrust machine device includes thrust machine, mobile platform, mobile platform fixed mount, impacter, impacter fixed mount, axle
Pin, pin groove, thrust machine device fixed mount.The thrust machine is fixed by bolts on mobile platform, the impacter fixed mount
On a mobile platform, the impacter is fixed on impacter fixed mount for welding, and the impacter adopts rig type impacter, institute
State mobile platform pivot pin to be fixed on mobile platform fixed mount, the mobile platform fixed mount is welded on thrust machine device and fixes
On frame, the thrust machine device fixed mount is welded by steel I-beam and steel channel beam, and the steel I-beam is provided with high-strength spiral shell
Keyhole, for joint steel pipe concrete pier column fixer；
Pass through the I-steel using high-strength bolt between the concrete filled steel tube pier stud fixing device and thrust machine device
High-strength bolt hole connection on beam.By adjusting the shifting that the left and right orientation of thrust machine device is realized in the position of the high-strength bolt
It is dynamic, by adjusting the movement that the orientation up and down of thrust machine device is realized in position of the pivot pin in pin groove, so as to more preferable
Remove the core concrete in steel pipe pier stud.
The specific implementation step for removing steel pipe pier stud core concrete using thrust device of the present invention is as follows：
Firstth, concrete filled steel tube pier stud fixing device and thrust machine device are connected by high-strength bolt on steel I-beam first
Connect, make both be assembled into an entirety.
Second and then the concrete filled steel tube pier stud for disassembling is put on steel pipe pier stud fixed support, tightening axle circle
Shape snap ring is fixed.
3rd, the pivot pin on the high-strength bolt and thrust machine device of connection is adjusted, thrust machine impacter alignment of orientation steel is made
The center of pipe concrete pier stud.
4th, open thrustor, the core concrete in steel pipe pier stud released, during this period can halt device at any time,
And thrust machine orientation is adjusted as needed, until core concrete is removed totally, so as to complete the recovery of steel pipe pier stud.
The thrust device of concrete filled steel tube pier stud is exclusively used in the present invention, it is basic to be capable of achieving within 15 minutes all to remove
Core concrete, substantially increases the removal of steel pipe pier stud core concrete, realizes the recycling of empty steel pipe pier stud.
The present invention has compared with prior art advantages below：
(1) concrete filled steel tube pier stud is filled made by concrete, by the effect of contraction of steel pipe shell in empty steel pipe
Make inner concrete in three dimension stress state, the comprcssive strength of core concrete is improved, while concrete filled and steel pipe
Shell bears axial compressive force jointly, enhances the geometrical stability of steel pipe walls；
(2) concrete filled steel tubular member has cylindrical outer shape, and bending rigidity is big, without anisotropy, is difficult torsional deformation, so as to
Improve the bearing capacity of concrete filled steel tube pier stud；
(3) concrete filled steel tube pier stud does not directly connect top, and steel pipe top cap has certain compression deformation ability, can be to top board
Certain pressure that allows is carried out, the portion of energy of within the rock is discharged, after its compression reaches capacity, concrete filled steel tube pier stud plays supporting
Efficiency, realizes the high strength support to top board, and this kind of supporting construction is particularly suited for the medium-thickness seam under the high-stress state of deep
Gob side entry retaining；
(4) the main component steel pipe pier stud reusing in the present invention, such as can be mixed steel pipe using rig and thrust machine
Solidifying knoll post inner core concrete is removed, and realizes the recovery of empty steel pipe pier stud, and lane cost is stayed in reduction；
(5) gob-side entry retaining method of the invention is less to the impact of staying lane front working face extraction, effectively increases coal
Production efficiency, improves the working environment in tunnel.
Description of the drawings
Fig. 1 is gob side entry retaining roadside support system sectional drawing of the present invention；
Fig. 2 is gob side entry retaining roadside support system structure diagram of the present invention；
Fig. 3 is concrete filled steel tube pier stud support meanss side view in the present invention；
Fig. 4 is concrete filled steel tube pier stud prop site plan in the present invention；
Fig. 5 is steel pipe type pier stud top cap structure chart in the present invention；
Fig. 6 is the front view or side view of bowl fastening type top cap in the present invention；
Fig. 7 is the top view of bowl fastening type top cap in the present invention；
Fig. 8 is the hardened composition of pier stud footwear in the present invention；
Fig. 9 is concrete filled steel tube pier stud fixture structure schematic diagram；
Figure 10 is thrust machine apparatus structure schematic diagram；
Figure 11 is the thrust device structural representation for being exclusively used in concrete filled steel tube pier stud.
Symbol description：
1. concrete filled steel tube pier stud support meanss, 2. light-weight aggregate flexible concrete spray coating, 3. air duct fabric, 4. rhombus reinforcing bar
Net, 5. concrete filled steel tube pier stud, 6. pier stud footwear plate, 7. pier stud top cap, 8. bending resistance round steel, 9. pier stud steel pipe, 10. cylinder lever connecting rod,
11. grouting ports, 12. steel pipe type pier stud top caps, 13. bowl fastening type pier stud top caps, 14. flexible cushions, 15. flat the rim of a bowl shape steel plates,
16. ears, 17. footwear slab plates, 18. arc plates, 19. screw threads, 20. closure steel plates, 21. concrete filled steel tube pier stud fixing devices, 22.
Thrust machine device, 23. steel pipe pier stud fixed mounts, 24. round clasps, 25. steel I-beams, 26. steel channel beams, 27. High-strength bolt holes,
28. pivot pins, 29. flap steel plates, 30. thrust machines, 31. mobile platforms, 32. mobile platform fixed mounts, 33. impacters, 34. impacts
Device fixed mount, 35. pin grooves, 36. thrust machine device fixed mounts.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.But embodiment is only exemplary, does not constitute any restriction to the scope of the present invention.Those skilled in the art should
It should be appreciated that, the details of technical solution of the present invention and form can be repaiied without departing from the spirit and scope of the invention
Change or replace, but these modifications and replacement are each fallen within protection scope of the present invention.
A kind of gob side entry retaining roadside support system of embodiment 1
As Figure 1-Figure 8, gob-side entry retaining support system includes that concrete filled steel tube pier stud support meanss 1, light-weight aggregate are flexible
Concrete spray coating 2, air duct fabric 3 and rhombus bar-mat reinforcement 4, along goaf side rhombus bar-mat reinforcement 4, the inner side of rhombus bar-mat reinforcement 4 are arranged
Laying air duct fabric 3, whitewashing process is carried out to air duct fabric 3 and rhombus bar-mat reinforcement 4 using light aggregate concrete, is formed in goaf side
Airfast light aggregate concrete spray-up 2, the thickness of light aggregate concrete spray-up 2 is 200mm-500mm, and light aggregate concrete sprays
The opposite side of layer 2 abuts concrete filled steel tube pier stud support meanss 1；
The concrete filled steel tube pier stud support meanss 1 include concrete filled steel tube pier stud 5, pier stud footwear plate 6, the and of pier stud top cap 7
Bending resistance round steel 8,8 points of bending resistance round steel is welded in the side of concrete filled steel tube pier stud 5, and top is provided with the pier stud top of 200-300mm height
Cap 7, bottom is connected with pier stud footwear plate 6, and concrete filled steel tube pier stud 5 includes perfusion coagulation in pier stud steel pipe 9, the inner tube of pier stud steel pipe 9
Soil, the top of pier stud steel pipe 9, bottom are provided with two cylinder lever connecting rods 10, and bottom is provided with grouting port 11, and the pier stud top cap 7 includes two
The form of kind：Steel pipe type pier stud top cap 12 and bowl fastening type pier stud top cap 13；
Steel pipe type pier stud top cap 12 is the steel pipe of a model bigger than the diameter of pier stud steel pipe 9, entangles concrete filled steel tube pier stud 5 and pushes up
End, top cap closure steel plate 20 is blocked, and flexible cushion 14, the thickness of the flexible cushion 14 are provided with inside steel pipe type pier stud top cap 12
Spend for 150-250mm；The flexible cushion 14 is wooden unit bed course or rubber spacer, to realize the slow pressure to concrete filled steel tube pier stud
Effect；
Bowl fastening type pier stud top cap 13 is formed by two flat the rim of a bowl shape steel plates 15 are with bolts, flat the rim of a bowl shape steel plate
15 flat bottom shape is truncated cone-shaped, and the truncated cone-shaped is flat to be enclosed within the top of concrete filled steel tube pier stud 5, the bowl fastening type pier stud top cap
13 top contacts with reserved back, and the bowl fastening type pier stud top cap 13 is hollow structure, with certain compression
Ability, therefore realize the contractibility of concrete filled steel tube pier stud；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate 15 is provided with four
Individual ear 16, is connected two flat the rim of a bowl shape steel plates 15 using bolt by ear 16.
Pier stud footwear plate 6 includes footwear slab plate 17,18,4 compositions of arc plates 18 of arc plate is welded on footwear slab plate 17 and is mixed with steel pipe
The base that solidifying knoll column bottom is engaged, each footwear slab plate 17 is provided with 3 bases, and the thickness of footwear slab plate 17 is 8-
20mm, concrete filled steel tube pier stud 5 is bolted with arc plate 18, is connected by cylinder lever connecting rod 10 between concrete filled steel tube pier stud 5
Connect；The cylinder lever connecting rod 10 is pull bar steel pipe, and concrete perfusion is formed in pipe.
The line space of the concrete filled steel tube pier stud 5 is 0.6-1m.
The concrete filled steel tube pier stud 5 is connected with the screw thread 19 of pier stud top cap 7.
The composition of the light aggregate concrete of embodiment 2
The composition of light aggregate concrete is (kg/m3)：Cement 450, haydite 650, sand 650, breeze 50, water 125, water reducer
3；The strength grade of light aggregate concrete is CL50, and apparent density is 800-1000kg/m3。
The construction method of the gob side entry retaining roadside support system of embodiment 3
Comprise the following steps that：
(1) first in ground processing and fabricating sky steel pipe pier stud shaft, pier stud top cap and pier stud footwear plate, concrete filled steel tube pier stud
Top outer is processed into screw thread mouth, and bottom is provided with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) edge in the goaf side in reserved tunnel hangs rhombus bar-mat reinforcement and air duct fabric, and mixed using light-weight aggregate
Solidifying soil carries out whitewashing process, and in the goaf side airfast light aggregate concrete spray-up is formed, by goaf sealing,
The light aggregate concrete jetting thickness is 200mm-500mm；
(3) empty steel pipe pier stud is set up against light aggregate concrete spray-up in the goaf side in reserved tunnel, steel pipe pier stud sets
Put on pier stud footwear plate, steel pipe pier stud installs a row or two rows, and the array pitch of adjacent two rows steel pipe pier stud is 0.6-1m, often arranges steel pipe
The adjacent pier stud spacing of pier stud is 0.6-1m, is connected by cylinder lever connecting rod between adjacent pier stud, to increase concrete filled steel tube pier stud
The stability of watch box system.It is high that steel pipe pier stud (i.e. concrete filled steel tube pier stud) arranges 200-300mm and the top board in reserved tunnel between
The pier stud top cap of degree, pier stud top cap is divided into two kinds：Steel pipe type pier stud top cap and bowl fastening type pier stud top cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles steel pipe pier capital end, and top cap is used
Steel plate is blocked, and flexible cushion is provided with inside steel pipe type pier stud top cap, and the thickness of the flexible cushion is 150-250mm；It is described soft
Property bed course be wooden unit bed course or rubber spacer, to realize the slow pressure effect to concrete filled steel tube pier stud；
Bowl fastening type pier stud top cap, is formed by two flat the rim of a bowl shape steel plates are with bolts, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the truncated cone-shaped is flat to be enclosed within steel pipe pier capital end, top and the reserved lane of the bowl fastening type steel plate
Road top plate contact, the bowl fastening type steel plate is hollow structure, with certain compression deformation ability, therefore realizes concrete filled steel tube
The contractibility of pier stud；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate is provided with four ears, will using bolt by ear
Two flat the rim of a bowl shape steel plate connections.
Include footwear slab plate on pier stud footwear plate, arc plate is welded on footwear slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud
The base that bottom is engaged, each footwear slab plate is provided with 3 bases, and the thickness of footwear slab plate is 8-20mm, concrete filled steel tube
Pier stud is bolted with arc plate, is connected by cylinder lever connecting rod between concrete filled steel tube pier stud；The cylinder lever connecting rod is pull bar
Steel pipe, concrete perfusion is formed in pipe.
(4) after empty steel pipe pier stud certain amount to be installed, using jack-block, filled to the inside of empty steel pipe pier stud by grouting port
Note fast hardening concrete, to concrete and capital in same level；Fast hardening concrete 1d can be carried, and 3d can reach normal concrete
14d intensity, 7d can reach normal concrete 28d intensity.
A kind of thrust device for being exclusively used in concrete filled steel tube pier stud of embodiment 4
As shown in figs. 9-11, reasoning device is included by concrete filled steel tube pier stud fixing device 21 and thrust machine device 22；
The concrete filled steel tube pier stud fixing device 21 includes steel pipe pier stud fixed mount 23 and round clasp 24, the steel pipe
Pier stud fixed mount 23 is welded by steel I-beam 25 and steel channel beam 26, and the steel I-beam 25 is provided with High-strength bolt hole
27, for connecting thrust machine device 22, the round clasp 24 is used to fix concrete filled steel tube pier stud 5, suitably adjusts circular card
The pivot pin 28 of ring 24, you can adapt to the concrete filled steel tube pier stud 5 of different model, the round clasp 24 is welded on steel channel beam 26
On, and in the sidepiece of round clasp 24 steel plate is welded with as flap steel plate 29, for strengthening the bearing capacity of round clasp 24；
Thrust machine device 22 includes thrust machine 30, mobile platform 31, mobile platform fixed mount 32, impacter 33, impacter
Fixed mount 34, pivot pin 28, pin groove 35, thrust machine device fixed mount 36；The thrust machine 30 is fixed by bolts to mobile platform
On, the impacter fixed mount is welded on a mobile platform, and the impacter 33 is fixed on impacter fixed mount 34, the punching
Device 33 is hit using rig type impacter, the pivot pin 28 of the mobile platform 31 is fixed on 32 on mobile platform fixed mount, the shifting
Moving platform fixed mount 32 is welded on thrust machine device fixed mount 36, and the thrust machine device fixed mount 36 is by the He of steel I-beam 25
Steel channel beam 26 is welded, and the steel I-beam 25 is provided with High-strength bolt hole 27, fixes for joint steel pipe performance of concrete column confined
Device 21；
Using high-strength bolt by the work between the concrete filled steel tube pier stud fixing device 21 and thrust machine device 22
High-strength bolt hole 27 on word girder steel 25 connects.
Claims (10)
1. a kind of gob side entry retaining roadside support system, it is characterised in that support system include concrete filled steel tube pier stud support meanss,
Light-weight aggregate flexible concrete spray coating, air duct fabric and rhombus bar-mat reinforcement, along goaf side rhombus bar-mat reinforcement, rhombus bar-mat reinforcement are arranged
Inner side laying air duct fabric, carries out whitewashing process, in goaf side shape to air duct fabric and rhombus bar-mat reinforcement using light aggregate concrete
Into airfast light aggregate concrete spray-up, the thickness of light aggregate concrete spray-up is 200mm-500mm, and light aggregate concrete sprays
The opposite side of layer abuts concrete filled steel tube pier stud support meanss；
The concrete filled steel tube pier stud support meanss include concrete filled steel tube pier stud, pier stud footwear plate, pier stud top cap and bending resistance round steel,
Bending resistance round steel point is welded in the side of concrete filled steel tube pier stud, and top is provided with the pier stud top cap of 200-300mm height, bottom and pier stud
Footwear plate is connected, and concrete filled steel tube pier stud includes pier stud steel pipe, pier stud steel duct concrete perfusion, pier stud steel pipe top, bottom
Two cylinder lever connecting rods are provided with, bottom is provided with grouting port, and the pier stud top cap includes two kinds of forms：Steel pipe type pier stud top cap and bowl button
Formula pier stud top cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles steel pipe pier capital end, top cap steel plate
Closure, is provided with flexible cushion inside steel pipe type pier stud top cap, the thickness of the flexible cushion is 150-250mm；
Bowl fastening type pier stud top cap, is formed by two flat the rim of a bowl shape steel plates are with bolts, flat the rim of a bowl shape steel plate it is flat
Truncated cone-shaped is shaped as, the truncated cone-shaped is flat to be enclosed within steel pipe pier capital end, top and the reserved lane of the bowl fastening type pier stud top cap
Road top plate contact, the bowl fastening type steel plate is hollow structure, with certain compression deformation ability, therefore realizes concrete filled steel tube
The contractibility of pier stud；
Include footwear slab plate on pier stud footwear plate, arc plate is welded on footwear slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud bottom
The base being engaged, each footwear slab plate is provided with 3 bases, and the thickness of footwear slab plate is 8-20mm, concrete filled steel tube pier stud
It is bolted with arc plate, is connected by cylinder lever connecting rod between concrete filled steel tube pier stud；Preferably, the flexible cushion is wood
Block bed course or rubber spacer.
2. gob side entry retaining roadside support system according to claim 1, it is characterised in that each flat the rim of a bowl shape steel plate
The rim of a bowl is provided with four ears, is connected two flat the rim of a bowl shape steel plates using bolt by ear.
3. gob side entry retaining roadside support system according to claim 1, it is characterised in that the cylinder lever connecting rod is pull bar steel
Pipe, concrete perfusion is formed in pipe.
4. gob side entry retaining roadside support system according to claim 1, it is characterised in that the concrete filled steel tube pier stud
Line space is 0.6-1m.
5. gob side entry retaining roadside support system according to claim 1, it is characterised in that the concrete filled steel tube pier stud with
Pier stud top cap is threadedly coupled.
6. gob side entry retaining roadside support system according to claim 1, it is characterised in that the structure of the light aggregate concrete
Become (kg/m3)：Cement 450, haydite 650, sand 650, breeze 50, water 125, water reducer 3；The strength grade of light aggregate concrete
For CL50, apparent density is 800-1000kg/m3。
7. gob side entry retaining roadside support system according to claim 1, it is characterised in that the steel tubing of the pier stud steel pipe
Matter can select Q235, Q345, Q390, Q420 steel, and outer diameter of steel pipes is 168-325mm, and thickness of steel pipe is 6-16mm.
8. as described in any one of claim 1-7 gob side entry retaining roadside support system construction method, comprise the following steps that：
(1) first at ground processing and fabricating sky steel pipe pier stud shaft, pier stud top cap and pier stud footwear plate, concrete filled steel tube pier stud top
Screw thread mouth is processed in outside, and bottom is provided with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) rhombus bar-mat reinforcement and air duct fabric are hung in the edge of the goaf side in reserved tunnel, and adopts light aggregate concrete
Whitewashing process is carried out, in the goaf side airfast light aggregate concrete spray-up is formed, the goaf is sealed, it is described
Light aggregate concrete jetting thickness is 200mm-500mm；
(3) empty steel pipe pier stud is set up against light aggregate concrete spray-up in the goaf side in reserved tunnel, steel pipe pier stud is arranged on
On pier stud footwear plate, steel pipe pier stud installs a row or two rows, and the array pitch of adjacent two rows steel pipe pier stud is 0.6-1m, often arranges steel pipe pier stud
Adjacent pier stud spacing be 0.6-1m, between adjacent pier stud by cylinder lever connecting rod connect, steel pipe pier stud (i.e. concrete filled steel tube pier stud)
The pier stud top cap of 200-300mm height is set and the top board in reserved tunnel between, and pier stud top cap is divided into two kinds：Steel pipe type pier stud top
Cap and bowl fastening type pier stud top cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles steel pipe pier capital end, top cap steel plate
Closure, is provided with flexible cushion inside steel pipe type pier stud top cap, the thickness of the flexible cushion is 150-250mm；
Bowl fastening type pier stud top cap, is formed by two flat the rim of a bowl shape steel plates are with bolts, flat the rim of a bowl shape steel plate it is flat
Truncated cone-shaped is shaped as, the truncated cone-shaped is flat to be enclosed within steel pipe pier capital end, and top and the reserved tunnel of the bowl fastening type steel plate are pushed up
Plate is contacted, and the bowl fastening type pier stud top cap is hollow structure, with certain compression deformation ability, therefore realizes concrete filled steel tube
The contractibility of pier stud；
Pier stud footwear plate includes footwear slab plate, and arc plate is welded on footwear slab plate, and 4 arc plates are constituted and concrete filled steel tube pier stud bottom phase
The base of cooperation, each footwear slab plate is provided with 3 bases, and the thickness of footwear slab plate is 8-20mm, concrete filled steel tube pier stud with
Arc plate is bolted, and is connected by cylinder lever connecting rod between concrete filled steel tube pier stud；
(4) after empty steel pipe pier stud certain amount to be installed, using jack-block, irrigated to the inside of empty steel pipe pier stud soon by grouting port
Dry concrete, to concrete and capital in same level.
9. construction method according to claim 8, it is characterised in that each flat the rim of a bowl shape steel plate in the step (3)
The rim of a bowl be provided with four ears, by ear using bolt by two flat the rim of a bowl shape steel plates connections.
10. the invention also discloses a kind of thrust device for being exclusively used in concrete filled steel tube pier stud, it is characterised in that thrust device bag
Include concrete filled steel tube pier stud fixing device and thrust machine device；
The concrete filled steel tube pier stud fixing device includes steel pipe pier stud fixed mount and round clasp, the steel pipe pier stud fixed mount
It is to be welded by steel I-beam and steel channel beam, the steel I-beam is provided with High-strength bolt hole, for connecting thrust machine device,
The round clasp is used to fix concrete filled steel tube pier stud, the appropriate pivot pin for adjusting round clasp, you can adapt to different model
Concrete filled steel tube pier stud, the round clasp is welded on steel channel beam, and is welded with steel plate as flap steel in round clasp sidepiece
Plate, for strengthening the bearing capacity of round clasp；
Thrust machine device includes thrust machine, mobile platform, mobile platform fixed mount, impacter, impacter fixed mount, pivot pin, axle
Cotter way, thrust machine device fixed mount.The thrust machine is fixed by bolts on mobile platform, and the impacter fixed mount is welded on
On mobile platform, the impacter is fixed on impacter fixed mount, and the impacter adopts rig type impacter, the movement
Platform pivot pin is fixed on mobile platform fixed mount, and the mobile platform fixed mount is welded on thrust machine device fixed mount,
The thrust machine device fixed mount is welded by steel I-beam and steel channel beam, and the steel I-beam is provided with High-strength bolt hole,
For joint steel pipe concrete pier column fixer；
Using high-strength bolt by the steel I-beam between the concrete filled steel tube pier stud fixing device and thrust machine device
High-strength bolt hole connection.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060876A (en) * | 2017-05-26 | 2017-08-18 | 新疆大学 | Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method |
| CN107355223A (en) * | 2017-08-21 | 2017-11-17 | 华北科技学院 | A kind of stope drift active workings gob-side entry retaining method suitable for easy inbreak top plate |
| CN107503778A (en) * | 2017-09-12 | 2017-12-22 | 新汶矿业集团有限责任公司 | The method that gob side entry retaining is realized using grouting cable anchor |
| CN107956509A (en) * | 2017-11-24 | 2018-04-24 | 河南理工大学 | One kind cuts top gob side entry retaining Anti-air-leakage method stage by stage |
| CN110513110A (en) * | 2019-07-19 | 2019-11-29 | 山东科技大学 | A kind of three-dimensional classification gear cash choke device and method for no coal column self-contained lane |
| WO2020098033A1 (en) * | 2018-11-16 | 2020-05-22 | 山东科技大学 | Supporting structural body for local goaf filling under hard roof conditions and construction method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337904A (en) * | 2011-09-09 | 2012-02-01 | 贾民 | Method for retaining gob-side tunnel |
| 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 |
| CN104481568A (en) * | 2014-09-15 | 2015-04-01 | 辽宁工程技术大学 | Fully mechanized caving face gob-side entry retaining process and ventilating method |
| CN104832188A (en) * | 2015-04-17 | 2015-08-12 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
| CN105803925A (en) * | 2016-03-17 | 2016-07-27 | 浙江大学 | Quick connection method for prefabricated steel pipe constraint type steel concrete pier columns and cover beam |
| CN206707726U (en) * | 2017-02-23 | 2017-12-05 | 山东建筑大学 | A kind of gob side entry retaining roadside support system |
-
2017
- 2017-02-23 CN CN201710100400.3A patent/CN106677804B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337904A (en) * | 2011-09-09 | 2012-02-01 | 贾民 | Method for retaining gob-side tunnel |
| 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 |
| CN104481568A (en) * | 2014-09-15 | 2015-04-01 | 辽宁工程技术大学 | Fully mechanized caving face gob-side entry retaining process and ventilating method |
| CN104832188A (en) * | 2015-04-17 | 2015-08-12 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
| CN105803925A (en) * | 2016-03-17 | 2016-07-27 | 浙江大学 | Quick connection method for prefabricated steel pipe constraint type steel concrete pier columns and cover beam |
| CN206707726U (en) * | 2017-02-23 | 2017-12-05 | 山东建筑大学 | A kind of gob side entry retaining roadside support system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060876A (en) * | 2017-05-26 | 2017-08-18 | 新疆大学 | Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method |
| CN107060876B (en) * | 2017-05-26 | 2024-03-22 | 新疆大学 | Steel pipe concrete pier column gob-side entry retaining active supporting structure and construction method thereof |
| CN107355223A (en) * | 2017-08-21 | 2017-11-17 | 华北科技学院 | A kind of stope drift active workings gob-side entry retaining method suitable for easy inbreak top plate |
| CN107503778A (en) * | 2017-09-12 | 2017-12-22 | 新汶矿业集团有限责任公司 | The method that gob side entry retaining is realized using grouting cable anchor |
| CN107956509A (en) * | 2017-11-24 | 2018-04-24 | 河南理工大学 | One kind cuts top gob side entry retaining Anti-air-leakage method stage by stage |
| CN107956509B (en) * | 2017-11-24 | 2020-05-26 | 河南理工大学 | Method for preventing wind leakage by stages in roof cutting gob-side entry retaining |
| WO2020098033A1 (en) * | 2018-11-16 | 2020-05-22 | 山东科技大学 | Supporting structural body for local goaf filling under hard roof conditions and construction method therefor |
| CN110513110A (en) * | 2019-07-19 | 2019-11-29 | 山东科技大学 | A kind of three-dimensional classification gear cash choke device and method for no coal column self-contained lane |
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