CN106677804B - A kind of gob side entry retaining roadside support system and its construction method - Google Patents
A kind of gob side entry retaining roadside support system and its construction method Download PDFInfo
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- CN106677804B CN106677804B CN201710100400.3A CN201710100400A CN106677804B CN 106677804 B CN106677804 B CN 106677804B CN 201710100400 A CN201710100400 A CN 201710100400A CN 106677804 B CN106677804 B CN 106677804B
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- 238000010276 construction Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 322
- 239000010959 steel Substances 0.000 claims abstract description 322
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 19
- 239000010432 diamond Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000010412 perfusion Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 238000004064 recycling Methods 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009412 basement excavation Methods 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
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process 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
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
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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
- 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
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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
- 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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Abstract
The present invention relates to a kind of gob side entry retaining roadside support system and its construction methods, diamond shape steel mesh is being arranged along goaf side in the present invention, air duct fabric is laid on the inside of diamond shape steel mesh, whitewashing processing is carried out using light aggregate concrete to air duct fabric and diamond shape steel mesh, airfast light aggregate concrete spray-up is formed in goaf side, light aggregate concrete spray-up with a thickness of 200mm-500mm, the other side of light aggregate concrete spray-up abuts concrete filled steel tube pier stud support device.Concrete filled steel tube pier stud is filled made of concrete in empty steel pipe in the present invention, so that inner concrete is in three dimension stress state by the effect of contraction of steel pipe shell, is enhanced the geometrical stability of steel pipe walls, improve the bearing capacity of concrete filled steel tube pier stud；The present invention to top plate can high strength support, effectively improve coal mining efficiency, improve the operating environment in tunnel；Concrete filled steel tube pier stud can realize that lane cost is stayed in recycling, reduction using dedicated thrust device in the present invention.
Description
Technical field
The present invention relates to a kind of gob side entry retaining roadside support system and its construction methods, and in particular to a kind of recyclable steel pipe
The gob side entry retaining roadside support system and its construction method of performance of concrete column confined belong to the gob side entry retaining field of deep-well medium-thickness seam.
Background technique
Gob side entry retaining is to safeguard used stope drift active workings along gob edge at working face rear, and is next
Section seam mining service, the technology can be realized Y type draft type, improve coal resources recovery ratio, reduce tunnelling amount,
Alleviate excavation replacement contradiction, prevent island working face from generating, shorten moving time, to raising mine economic benefit and mine safety
It produces extremely advantageous.
Currently used edge air gallery technology includes masonry shield lane (pack wall and concrete block wall etc.), obturation shield
Lane (high percentage of water rapid solidifying material, ointment material, fast hardening concrete and soft mould pumping filling), concrete filled steel tube pier stud add pack wall to protect lane
With the technologies such as the lane Qie Dingcheng.It is low that masonry protects lane technical costs, but Lack of support, large labor intensity or sealing effect are poor；It fills
The lane Tian Tihu has setting rate is fast, early strength is good, closed goaf effect is good, mechanization degree is high, labor intensity is low etc.
Feature, but there are support forces it is insufficient, filling cost is high the problems such as；Concrete filled steel tube pier stud+pack wall shield lane technical support power height,
Stay lane effect good, but cost caused by that there are pier stud bending resistance effects is poor, the high or steel pipe that builds pack wall labor intensity is not recyclable
The problems such as high；The lane Qie Dingcheng technical costs is low, supporting effect is good, but requires height to top plate geological conditions, otherwise whole to cut top effect
Fruit or to be caving into lane effect poor.
Summary of the invention
In view of the above problems, specifically being related to the invention proposes a kind of gob side entry retaining roadside support system and its construction method
And a kind of gob-side entry retaining support system based on solid matter bending-resistant type concrete filled steel tube pier stud shield lane, the present invention use concrete filled steel tube
Pier stud and light-weight aggregate flexible concrete spray coating construct roadside support body, and roadside support body can quickly cut top and guarantee its stabilization
Property, have the characteristics that supporting intensity is high, anti-bending strength is good, the recyclable recycling of pier stud steel pipe.The present invention is suitable for deep-well
High seam, efficiently solves deep-well medium-thickness seam edge air gallery technology problem, i.e., roadside support body is vertical and horizontal direction bearing capacity
The insufficient 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 device, light-weight aggregate flexible concrete
Spray-up, air duct fabric and diamond shape steel mesh are arranged diamond shape steel mesh along goaf side, are laid with air duct fabric on the inside of diamond shape steel mesh,
Whitewashing processing is carried out using light aggregate concrete to air duct fabric and diamond shape steel mesh, forms airfast light-weight aggregate in goaf side
Concrete spray coating, light aggregate concrete spray-up with a thickness of 200mm-500mm, the other side of light aggregate concrete spray-up abuts steel
Pipe concrete pier stud support device；
The concrete filled steel tube pier stud support device includes concrete filled steel tube pier stud, pier stud shoes plate, pier stud top cap and bending resistance
Round steel, bending resistance round steel point are welded in the side of concrete filled steel tube pier stud, and top is equipped with the pier stud top cap of 200-300mm height, bottom end
Be connected with pier stud shoes plate, concrete filled steel tube pier stud includes pier stud steel pipe, pier stud pouring concrete within steel pipe, pier stud steel pipe it is upper
Portion, lower part are set there are two connecting rod, and lower part is equipped 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 top end, and top cap is used
Block steel plate to block, be equipped with flexible cushion inside steel pipe type pier stud top cap, the flexible cushion with a thickness of 150-250mm；Institute
Stating flexible cushion is 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 connected by screw bolts by two flat the rim of a bowl shape steel plates, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the flat set of truncated cone-shaped is in steel pipe pier top end, the top of the bowl fastening type pier stud top cap and pre-
Back is stayed to contact, the bowl fastening type steel plate is hollow structure, has certain compression deformation ability, therefore realize that steel pipe is mixed
The contractibility of solidifying knoll column；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate is set there are four ear, utilizes spiral shell by ear
Bolt connects two flat the rim of a bowl shape steel plates.
Include shoes slab plate on pier stud shoes plate, arc plate is welded on shoes slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud
The pedestal that bottom matches, each shoes slab plate be equipped with 3 pedestals, shoes slab plate with a thickness of 8-20mm, concrete filled steel tube
Pier stud is bolted with arc plate, is connected between concrete filled steel tube pier stud by connecting rod；The connecting rod is pull rod
Steel pipe is managed interior concrete perfusion and is formed.
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, sand 650, miberal powder 50, water 125, subtracts haydite 650
Aqua 3；The strength grade of light aggregate concrete is CL50, apparent density 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 shoes plate, concrete filled steel tube pier stud
Top outer is processed into screw thread mouth, and lower part is equipped with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) diamond shape steel mesh and air duct fabric are hung in the edge of the goaf side in reserved tunnel, and mixed using light-weight aggregate
Solidifying soil carries out whitewashing processing, forms airfast light aggregate concrete spray-up in the goaf side, the goaf is sealed,
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 is set
It sets on pier stud shoes 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, every row's steel pipe
The adjacent pier stud spacing of pier stud is 0.6-1m, is connected between adjacent pier stud by connecting rod, to increase concrete filled steel tube pier stud branch
The stability of watch box system.200-300mm high is set between steel pipe pier stud (i.e. concrete filled steel tube pier stud) and the top plate in reserved tunnel
The pier stud top cap of degree, pier stud top cap are 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 top end, and top cap is used
Steel plate blocks, and is equipped with flexible cushion inside steel pipe type pier stud top cap, the flexible cushion with a thickness of 150-250mm；It is described soft
Property bed course be wooden unit bed course or rubber spacer, to realize to the slow pressure effect of concrete filled steel tube pier stud；
Bowl fastening type pier stud top cap is connected by screw bolts by two flat the rim of a bowl shape steel plates, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the flat set of truncated cone-shaped is at steel pipe pier top end, the top and reserved lane of the bowl fastening type steel plate
Road top plate contact, the bowl fastening type pier stud top cap are hollow structure, have certain compression deformation ability, therefore realize that steel pipe is mixed
The contractibility of solidifying knoll column；Preferably, the rim of a bowl of each flat the rim of a bowl shape steel plate is set there are four ear, utilizes spiral shell by ear
Bolt connects two flat the rim of a bowl shape steel plates.
Pier stud shoes plate includes shoes slab plate, and arc plate is welded on shoes slab plate, and 4 arc plates are constituted and concrete filled steel tube pier stud bottom
The pedestal that portion matches, each shoes slab plate be equipped with 3 pedestals, shoes slab plate with a thickness of 8-20mm, steel tube concrete knoll
Column is bolted with arc plate, is connected between concrete filled steel tube pier stud by connecting rod；The connecting rod is pull rod steel
Pipe is managed interior concrete perfusion and is formed.
(4) after empty steel pipe pier stud certain amount to be installed, using jack-block, by grouting port to filling inside empty steel pipe pier stud
Fast hardening concrete is infused, with vibrating spear side vibration is carried out outside steel pipe after the concrete of every note 50cm, to guarantee the closely knit of concrete
Degree, until concrete and capital are in same level；Fast hardening concrete 1d can be carried, and 3d can reach normal concrete 14d intensity, 7d
It can reach normal concrete 28d intensity.
Q235, Q345, Q390, Q420 steel can be selected in the steel pipe material of pier stud steel pipe in the present invention, and outer diameter of steel pipes is
168-325mm, thickness of steel pipe 6-16mm.
Concrete filled steel tube pier stud is recyclable, and there are two types of recovery methods: first is that being bored broken core concrete using drilling machine, being struck
It hits vibration on the outside of steel pipe to fall tube wall concrete and topple over, realizes steel pipe recycling；Second is that using pushing away for concrete filled steel tube pier stud is exclusively used in
Power machine, core concrete is released, and leaves sky steel pipe, realizes recycling.Based on the method for above-mentioned gob side entry retaining, the invention also includes
A kind of thrust device being exclusively used in concrete filled steel tube pier stud.Currently, Inner Mongol Great Wall mine has realized gob side entry retaining concrete filled steel tube
The recycling of pier stud, the mine withdraw scene using small-sized hydraulic drilling machine, when core concrete removes in concrete filled steel tube pier stud
Between be every 30 minutes, and the present invention can make steel pipe pier stud core concrete remove the time be reduced to every 10-15 minutes, greatly
The removal efficiency of core concrete is improved greatly.
A kind of thrust device being exclusively used in concrete filled steel tube pier stud, including concrete filled steel tube pier column fixer and thrust machine
Device；
The concrete filled steel tube pier column fixer includes steel pipe pier stud fixed frame and round clasp, and the steel pipe pier stud is solid
Determining frame is welded by steel I-beam and steel channel beam, and the steel I-beam is equipped with High-strength bolt hole, for connecting thrust machine
Device, for the round clasp for fixing concrete filled steel tube pier stud, the appropriate pivot pin for adjusting round clasp is suitable for 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 side
Wing steel plate, for enhancing the bearing capacity of round clasp；
Thrust machine device includes thrust machine, mobile platform, mobile platform fixed frame, impactor, impactor fixed frame, axis
Pin, pin groove, thrust machine device fixed frame.The thrust machine is fixed by bolts on mobile platform, the impactor fixed frame
On a mobile platform, the impactor is fixed on impactor fixed frame for welding, and the impactor uses drilling machine type impactor, institute
It states mobile platform to be fixed on mobile platform fixed frame with pivot pin, the mobile platform fixed frame is welded on thrust machine device and fixes
On frame, the thrust machine device fixed frame is welded by steel I-beam and steel channel beam, and the steel I-beam is equipped with high-strength spiral shell
Keyhole is used for joint steel pipe concrete pier column fixer；
Pass through the I-steel using high-strength bolt between the concrete filled steel tube pier column fixer and thrust machine device
High-strength bolt hole connection on beam.Realize the shifting in the left and right orientation of thrust machine device in position by adjusting the high-strength bolt
Movement that is dynamic, realizing the orientation up and down of thrust machine device by adjusting position of the pivot pin in pin groove, thus preferably
Remove the core concrete in steel pipe pier stud.
Specific implementation step using thrust device of the present invention removal steel pipe pier stud core concrete is as follows:
The first, concrete filled steel tube pier column fixer and thrust machine device are connected by high-strength bolt on steel I-beam first
It connects, the two is made to be assembled into an entirety.
The second, then the concrete filled steel tube pier stud disassembled is put on the fixed bracket of steel pipe pier stud, tightening axle circle
Shape snap ring is fixed.
The pivot pin on high-strength bolt and thrust machine device that third, adjusting connect, makes thrust machine impactor alignment of orientation steel
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 removal is clean, to complete the recycling 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 that i.e. all removals within 15 minutes can be achieved
Core concrete substantially increases the removal of steel pipe pier stud core concrete, realizes the recycling of empty steel pipe pier stud.
Compared with the prior art, the present invention has the following advantages:
(1) concrete filled steel tube pier stud is filled made of concrete in empty steel pipe, passes through the effect of contraction of steel pipe shell
So that inner concrete is in three dimension stress state, improves the compression strength of core concrete, 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 stiffness is big, and no anisotropy is not easy torsional deformation, thus
Improve the bearing capacity of concrete filled steel tube pier stud；
(3) concrete filled steel tube pier stud does not connect top directly, and steel pipe top cap has certain compression deformation ability, can be to top plate
Certain pressure that allows is carried out, the portion of energy in rock stratum is discharged, after its compression reaches capacity, concrete filled steel tube pier stud plays supporting
Efficiency, realizes the high strength support to top plate, and such supporting construction is particularly suitable 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 used drilling machine and thrust machine mixes steel pipe
Solidifying knoll column inner core concrete removal realizes that lane cost is stayed in the recycling of empty steel pipe pier stud, reduction；
(5) gob-side entry retaining method of the invention is smaller to the influence for staying working face extraction in front of lane, effectively increases coal
Production efficiency improves the operating environment in tunnel.
Detailed description of the invention
Fig. 1 is gob side entry retaining roadside support system cross-section diagram 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 device side view in the present invention；
Fig. 4 is concrete filled steel tube pier stud prop floor 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 shoes 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 schematic diagram for being exclusively used in concrete filled steel tube pier stud.
Symbol description:
1. concrete filled steel tube pier stud support device, 2. light-weight aggregate flexible concrete spray coatings, 3. air duct fabrics, 4. diamond shape reinforcing bars
Net, 5. concrete filled steel tube pier studs, 6. pier stud shoes plates, 7. pier stud top caps, 8. bending resistance round steel, 9. pier stud steel pipes, 10. connecting rods,
11. grouting port, 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. ear, 17. shoes slab plates, 18. arc plates, 19. screw threads, 20. block steel plate, 21. concrete filled steel tube pier column fixers, 22.
Thrust machine device, 23. steel pipe pier stud fixed frames, 24. round clasps, 25. steel I-beams, 26. steel channel beams, 27. High-strength bolt holes,
28. pivot pin, 29. flap steel plates, 30. thrust machines, 31. mobile platforms, 32. mobile platform fixed frames, 33. impactors, 34. impacts
Device fixed frame, 35. pin grooves, 36. thrust machine device fixed frames.
Specific embodiment
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art answer
It should be appreciated that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form repair
Change or replace, but these modifications and replacement are fallen within the 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 concrete filled steel tube pier stud support device 1, light-weight aggregate flexibility
Diamond shape steel mesh 4,4 inside of diamond shape steel mesh is arranged along goaf side in concrete spray coating 2, air duct fabric 3 and diamond shape steel mesh 4
It is laid with air duct fabric 3, whitewashing processing is carried out using light aggregate concrete to air duct fabric 3 and diamond shape steel mesh 4, is formed in goaf side
Airfast light aggregate concrete spray-up 2, light aggregate concrete spray-up 2 with a thickness of 200mm-500mm, light aggregate concrete spray
The other side of layer 2 abuts concrete filled steel tube pier stud support device 1；
The concrete filled steel tube pier stud support device 1 includes concrete filled steel tube pier stud 5, pier stud shoes plate 6,7 and of pier stud top cap
Bending resistance round steel 8,8 points of the bending resistance round steel sides for being welded in concrete filled steel tube pier stud 5, top is equipped with the pier stud top of 200-300mm height
Cap 7, bottom end are connected with pier stud shoes plate 6, and concrete filled steel tube pier stud 5 includes pier stud steel pipe 9, and coagulation is perfused in 9 inner tube of pier stud steel pipe
Soil, 9 top of pier stud steel pipe, lower part are set there are two connecting rod 10, and lower part is equipped with grouting port 11, and the pier stud top cap 7 includes two
Kind form: 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 9 diameter of pier stud steel pipe, entangles the top of concrete filled steel tube pier stud 5
End, top cap are blocked with steel plate 20 is blocked, and are equipped with flexible cushion 14, the thickness of the flexible cushion 14 inside steel pipe type pier stud top cap 12
Degree is 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 connected by screw bolts by two flat the rim of a bowl shape steel plates 15, flat the rim of a bowl shape steel plate
15 flat bottom shape is truncated cone-shaped, and the flat set of truncated cone-shaped is in 5 top of concrete filled steel tube pier stud, the bowl fastening type pier stud top cap
13 top is contacted with reserved back, and the bowl fastening type pier stud top cap 13 is hollow structure, has certain compressive deformation
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 equipped with four
A ear 16 is connected two flat the rim of a bowl shape steel plates 15 using bolt by ear 16.
Pier stud shoes plate 6 includes shoes slab plate 17, and 18,4 arc plates 18 of welding arc plate are constituted mixed with steel pipe on shoes slab plate 17
The pedestal that solidifying knoll column bottom matches, each shoes slab plate 17 are equipped with 3 pedestals, shoes slab plate 17 with a thickness of 8-
20mm, concrete filled steel tube pier stud 5 are bolted with arc plate 18, are connected between concrete filled steel tube pier stud 5 by connecting rod 10
It connects；The connecting rod 10 is pull rod steel pipe, manages interior concrete perfusion and forms.
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 connect with 7 screw thread 19 of pier stud top cap.
The composition of 2 light aggregate concrete of embodiment
The composition of light aggregate concrete is (kg/m3): cement 450, haydite 650, sand 650, miberal powder 50, water 125, water-reducing agent
3；The strength grade of light aggregate concrete is CL50, apparent density 800-1000kg/m3。
The construction method of 3 gob side entry retaining roadside support system of embodiment
Specific step is as follows:
(1) first in ground processing and fabricating sky steel pipe pier stud shaft, pier stud top cap and pier stud shoes plate, concrete filled steel tube pier stud
Top outer is processed into screw thread mouth, and lower part is equipped with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) diamond shape steel mesh and air duct fabric are hung in the edge of the goaf side in reserved tunnel, and mixed using light-weight aggregate
Solidifying soil carries out whitewashing processing, forms airfast light aggregate concrete spray-up in the goaf side, the goaf is sealed,
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 is set
It sets on pier stud shoes 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, every row's steel pipe
The adjacent pier stud spacing of pier stud is 0.6-1m, is connected between adjacent pier stud by connecting rod, to increase concrete filled steel tube pier stud branch
The stability of watch box system.200-300mm high is set between steel pipe pier stud (i.e. concrete filled steel tube pier stud) and the top plate in reserved tunnel
The pier stud top cap of degree, pier stud top cap are 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 top end, and top cap is used
Steel plate blocks, and is equipped with flexible cushion inside steel pipe type pier stud top cap, the flexible cushion with a thickness of 150-250mm；It is described soft
Property bed course be wooden unit bed course or rubber spacer, to realize to the slow pressure effect of concrete filled steel tube pier stud；
Bowl fastening type pier stud top cap is connected by screw bolts by two flat the rim of a bowl shape steel plates, flat the rim of a bowl shape steel plate
Flat bottom shape is truncated cone-shaped, and the flat set of truncated cone-shaped is at steel pipe pier top end, the top and reserved lane of the bowl fastening type steel plate
Road top plate contact, the bowl fastening type steel plate are hollow structure, have certain compression deformation ability, therefore realize 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 set there are four ear, will using bolt by ear
Two flat the rim of a bowl shape steel plate connections.
Include shoes slab plate on pier stud shoes plate, arc plate is welded on shoes slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud
The pedestal that bottom matches, each shoes slab plate be equipped with 3 pedestals, shoes slab plate with a thickness of 8-20mm, concrete filled steel tube
Pier stud is bolted with arc plate, is connected between concrete filled steel tube pier stud by connecting rod；The connecting rod is pull rod
Steel pipe is managed interior concrete perfusion and is formed.
(4) after empty steel pipe pier stud certain amount to be installed, using jack-block, by grouting port to filling inside empty steel pipe pier stud
Fast hardening concrete is infused, until concrete and capital are 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 includes by concrete filled steel tube pier column fixer 21 and thrust machine device 22；
The concrete filled steel tube pier column fixer 21 includes steel pipe pier stud fixed frame 23 and round clasp 24, the steel pipe
Pier stud fixed frame 23 is welded by steel I-beam 25 and steel channel beam 26, and the steel I-beam 25 is equipped with High-strength bolt hole
27, for connecting thrust machine device 22, the round clasp 24 suitably adjusts circular card for fixing concrete filled steel tube pier stud 5
The pivot pin 28 of ring 24, that is, be suitable for the concrete filled steel tube pier stud 5 of different model, and the round clasp 24 is welded on steel channel beam 26
On, and steel plate is welded with as flap steel plate 29, for enhancing the bearing capacity of round clasp 24 in 24 side of round clasp；
Thrust machine device 22 includes thrust machine 30, mobile platform 31, mobile platform fixed frame 32, impactor 33, impactor
Fixed frame 34, pivot pin 28, pin groove 35, thrust machine device fixed frame 36；The thrust machine 30 is fixed by bolts to mobile platform
On, on a mobile platform, the impactor 33 is fixed on impactor fixed frame 34, the punching for the impactor fixed frame welding
It hits device 33 and uses drilling machine type impactor, the mobile platform 31 pivot pin 28 is fixed on the shifting 32 on mobile platform fixed frame
Moving platform fixed frame 32 is welded on thrust machine device fixed frame 36, and the thrust machine device fixed frame 36 is by 25 He of steel I-beam
Steel channel beam 26 is welded, and the steel I-beam 25 is equipped with High-strength bolt hole 27, fixes for joint steel pipe performance of concrete column confined
Device 21；
Pass through the work using high-strength bolt between the concrete filled steel tube pier column fixer 21 and thrust machine device 22
High-strength bolt hole 27 on word girder steel 25 connects.
Claims (9)
1. a kind of gob side entry retaining roadside support system, which is characterized in that support system include concrete filled steel tube pier stud support device,
Diamond shape steel mesh, diamond shape steel mesh is arranged along goaf side in light-weight aggregate flexible concrete spray coating, air duct fabric and diamond shape steel mesh
Inside is laid with air duct fabric, whitewashing processing is carried out using light aggregate concrete to air duct fabric and diamond shape steel mesh, in goaf side shape
At airfast light aggregate concrete spray-up, light aggregate concrete spray-up with a thickness of 200mm-500mm, light aggregate concrete spray
The other side of layer abuts concrete filled steel tube pier stud support device；
The concrete filled steel tube pier stud support device includes concrete filled steel tube pier stud, pier stud shoes 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 equipped with the pier stud top cap of 200-300mm height, bottom end and pier stud
Shoes 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, lower part
If lower part is equipped with grouting port there are two connecting rod, the pier stud top cap includes two kinds of forms: steel pipe type pier stud top cap and bowl buckle
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 top end, top cap steel plate
Block, be equipped with flexible cushion inside steel pipe type pier stud top cap, the flexible cushion with a thickness of 150-250mm；
Bowl fastening type pier stud top cap is connected by screw bolts by two flat the rim of a bowl shape steel plates, flat the rim of a bowl shape steel plate it is flat
Shape is truncated cone-shaped, and the flat set of truncated cone-shaped is at steel pipe pier top end, the top and reserved lane of the bowl fastening type pier stud top cap
Road top plate contact, the bowl fastening type steel plate are hollow structure, have certain compression deformation ability, therefore realize concrete filled steel tube
The contractibility of pier stud；
Include shoes slab plate on pier stud shoes plate, arc plate is welded on shoes slab plate, 4 arc plates are constituted and concrete filled steel tube pier stud bottom
The pedestal matched, each shoes slab plate be equipped with 3 pedestals, shoes slab plate with a thickness of 8-20mm, concrete filled steel tube pier stud
It is bolted with arc plate, is connected between concrete filled steel tube pier stud by connecting rod；
The composition of the light aggregate concrete are as follows: 450 kg/m of cement3, 650 kg/m of haydite3, 650 kg/m of sand3, miberal powder 50
kg/m3, 125 kg/m of water3, 3 kg/m of water-reducing agent3；The strength grade of light aggregate concrete is CL50, apparent density 800-
1000kg/m3。
2. gob side entry retaining roadside support system according to claim 1, which is characterized in that the flexible cushion is wooden unit pad
Layer or rubber spacer.
3. gob side entry retaining roadside support system according to claim 1, which is characterized in that each flat the rim of a bowl shape steel plate
The rim of a bowl is set there are four ear, is connected two flat the rim of a bowl shape steel plates using bolt by ear.
4. gob side entry retaining roadside support system according to claim 1, which is characterized in that the connecting rod is pull rod steel
Pipe is managed interior concrete perfusion and is formed.
5. gob side entry retaining roadside support system according to claim 1, which is characterized in that the concrete filled steel tube pier stud
Line space is 0.6-1m.
6. gob side entry retaining roadside support system according to claim 1, which is characterized in that the concrete filled steel tube pier stud with
Pier stud top cap is threadedly coupled.
7. gob side entry retaining roadside support system according to claim 1, which is characterized in that the steel tubing of the pier stud steel pipe
Matter selects Q235, Q345, Q390, Q420 steel, outer diameter of steel pipes 168-325mm, thickness of steel pipe 6-16mm.
8. the construction method of gob side entry retaining roadside support system as described in claim any one of 1-7, the specific steps are as follows:
(1) first at the top of ground processing and fabricating sky steel pipe pier stud shaft, pier stud top cap and pier stud shoes plate, concrete filled steel tube pier stud
Screw thread mouth is processed into outside, and lower part is equipped with grouting port, the side spot welding bending resistance round steel of concrete filled steel tube pier stud；
(2) diamond shape steel mesh and air duct fabric are hung in the edge of the goaf side in reserved tunnel, and uses light aggregate concrete
Whitewashing processing is carried out, airfast light aggregate concrete spray-up is formed in the goaf side, 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, the setting of steel pipe pier stud exists
On pier stud shoes 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, every row's steel pipe pier stud
Adjacent pier stud spacing be 0.6-1m, connected by connecting rod between adjacent pier stud, concrete filled steel tube pier stud and reserved tunnel
The pier stud top cap of 200-300mm height is set between top plate, and pier stud top cap is divided into two kinds: steel pipe type pier stud top cap and bowl fastening type pier
Capital cap；
Steel pipe type pier stud top cap is the steel pipe of a model bigger than pier stud diameter of steel tube, entangles concrete filled steel tube pier stud top, top cap
Blocked with steel plate, be equipped with flexible cushion inside steel pipe type pier stud top cap, the flexible cushion with a thickness of 150-250mm；
Bowl fastening type pier stud top cap is connected by screw bolts by two flat the rim of a bowl shape steel plates, flat the rim of a bowl shape steel plate it is flat
Shape is truncated cone-shaped, and the flat set of truncated cone-shaped is on concrete filled steel tube pier stud top, the top of the bowl fastening type steel plate and reserved
Back contact, the bowl fastening type pier stud top cap are hollow structure, have certain compression deformation ability, therefore realize steel pipe
The contractibility of performance of concrete column confined；
Pier stud shoes plate includes shoes slab plate, and arc plate is welded on shoes slab plate, and 4 arc plates are constituted and concrete filled steel tube pier stud bottom phase
The pedestal of cooperation, each shoes slab plate are equipped with 3 pedestals, shoes slab plate with a thickness of 8-20mm, concrete filled steel tube pier stud with
Arc plate is bolted, and is connected between concrete filled steel tube pier stud by connecting rod；
(4) after empty concrete filled steel tube pier stud certain amount to be installed, using jack-block, by grouting port to empty steel tube concrete knoll
Fast hardening concrete is perfused inside column, until concrete and capital are in same level.
9. construction method according to claim 8, which is characterized in that each flat the rim of a bowl shape steel plate in the step (3)
The rim of a bowl set there are four ear, two flat the rim of a bowl shape steel plates are connected using bolt by ear.
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| 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 |
| 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 |
| CN109595029B (en) * | 2018-11-16 | 2019-08-09 | 山东科技大学 | Goaf partial stowage supporting structure and its construction method under the conditions of tight roof |
| CN110513110B (en) * | 2019-07-19 | 2021-03-30 | 山东科技大学 | Three-dimensional grading gangue blocking and air blocking device and method for coal-pillar-free self-roadway forming |
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| CN102337904B (en) * | 2011-09-09 | 2013-12-18 | 贾民 | Method for retaining gob-side tunnel |
| CN103485801B (en) * | 2013-08-26 | 2016-01-20 | 中国矿业大学(北京) | For the roadway support device of workings subject to dy namic pressure and gob side entry retaining |
| CN104481568B (en) * | 2014-09-15 | 2016-08-31 | 辽宁工程技术大学 | A kind of fully mechanized coal face gob side entry retaining technique and method of ventilation |
| CN104832188B (en) * | 2015-04-17 | 2017-02-01 | 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 |
| CN105803925B (en) * | 2016-03-17 | 2017-05-17 | 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 |
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