CN107060876A - Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method - Google Patents

Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method Download PDF

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Publication number
CN107060876A
CN107060876A CN201710383198.XA CN201710383198A CN107060876A CN 107060876 A CN107060876 A CN 107060876A CN 201710383198 A CN201710383198 A CN 201710383198A CN 107060876 A CN107060876 A CN 107060876A
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CN
China
Prior art keywords
concrete
pier stud
steel tube
filled steel
concrete filled
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Application number
CN201710383198.XA
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Chinese (zh)
Inventor
赵红超
高明仕
陈辉
周光能
张世安
吕金星
齐琦
李虎威
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Xinjiang University
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Xinjiang University
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Application filed by Xinjiang University filed Critical Xinjiang University
Priority to CN201710383198.XA priority Critical patent/CN107060876A/en
Publication of CN107060876A publication Critical patent/CN107060876A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/02Supporting means, e.g. shuttering, for filling-up materials

Abstract

The invention discloses a kind of concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method, including concrete filled steel tube pier stud and hydraulic jack, concrete grouting pump and emulsion power pack composition.Concrete filled steel tube pier stud wherein positioned at work face goaf side is formed by steel pipe and Combined concrete.Emulsion power pack gives the hydraulic jack for being installed in steel pipe top to provide power by emulsion delivery pipe.Described method and step includes:According to design requirement construction steel pipe performance of concrete column confined;Install and adjust hydraulic jack position;Start emulsion power pack and carry out first time pressure.Above-mentioned steps are circulated, until all concrete filled steel tube pier stud active support structures have 1MPa setting load.Between every two days after, secondary pressure is carried out to all hydraulic jack, stops pressurizeing when pressure gauge reading reaches 2MPa.Construction technology of the present invention is simple, becomes conventional steel concrete passive protecting form into active support, gives full play to the technology economy advantage of concrete filled steel tube pier stud.

Description

Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method
Technical field
The present invention relates to one kind without coal pillar mining roadside packing support technology, especially a kind of concrete filled steel tube pier stud edge is empty Lane active support structure and its construction method are stayed, in gob side entry retaining roadside packing support technology.
Background technology
The technology economy advantage that concrete filled steel tube pier stud gob side entry retaining is protruded with it is in coal mine gob-side entry retaining roadside packing branch More and more applied in shield technology.Compared with traditional concrete wall roadside support, outside concrete filled steel tube pier stud Portion's steel pipe not only serves as the effect of template during casting concrete, while providing constraint to inner concrete, makes internal mixed Solidifying soil is in three-dimensional stress state, and the intensity and ductility of inner concrete are improved to a certain extent.Outside steel pipe internally core Under the effect of contraction of heart concrete, two-dimensional state of stress is changed into from original uniaxial stressed state, its mechanical characteristics is also had Effect ground is played.Therefore, the concrete filled steel tube pier stud edge air gallery technology based on steel pipe and concrete combined structure advantage meet the tendency of and It is raw.However, due to the inconsistency of underworkings height, standard-sized steel core concrete column is pushed up with tunnel in use The contact sex chromosome mosaicism of plate, which never has, effectively to be solved.Top is fully connect to realize, the frame generally above concrete filled steel tube pier stud If the sleeper of different-thickness is changed with adapting to different head-rooms.The intensity and ductility of sleeper are compared with concrete filled steel tube pier stud There is larger otherness, concrete filled steel tube pillarwork is high-strength, technical advantage of high ductibility is produced not for giving full play to Profit influence.Sleeper produces moderate finite deformation during being embodied in roof weighting, but bearing capacity is in reduced levels all the time, most Cause eventually stay occur at lane initial stage it is large range of crush, or even the absciss layer of overlying rock can be caused, then influence whole Stay the stability of lane system.On the other hand, concrete filled steel tube pier stud is under the jurisdiction of passive protecting system in itself, it is impossible at the initial stage of erection Movement of the effective setting load to resist overlying rock is provided, particularly cut staying lane can not provide enough setting loads initial stage Break work face goaf side top plate to form the hardened structure of arc triangle.For solve the problems, such as concrete filled steel tube pier stud fully connect top and Setting load problem, the present invention proposes a kind of concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method, maximum That realizes to limit concrete filled steel tube pier stud fully connects top, and provides effective controllable setting load.
The content of the invention
Technical problem:It is an object of the invention to provide a kind of steel tube concrete that can fully connect top and provide controllable setting load Knoll post gob side entry retaining active support structure and its construction method, solve conventional steel performance of concrete column confined gob-side entry retaining support technology In can not fully connect the technical problem on top, while changing based on the passive protecting form of existing concrete filled steel tube pier stud gob side entry retaining There is provided the setting load that can be adjusted according to actual needs for dynamic supporting.
A kind of concrete filled steel tube pier stud gob side entry retaining active support structure, including concrete filled steel tube pier stud and hydraulic jack Top, described concrete filled steel tube pier stud is by outside steel pipe and the internal coagulation local soil type filled into the straight of, described hydraulic jack Footpath 5 cm smaller than the internal diameter of steel pipe in concrete filled steel tube pier stud.
The outside steel pipe of described concrete filled steel tube pier stud realizes sky by way of welding circular steel plate in upper and lower ends Between it is closed.Wherein, upper end steel plate is welded on the outside cm of steel pipe top edge 3 of distance position, and the position vacated is as spacing Groove is to lay hydraulic jack.Steel pipe top position is installed with injected hole and steam vent, wherein exhaust hole site is higher than slip casting Hole, injected hole is connected by cored screw with the rubber hose with check valve.
The described rubber hose other end with unidirectional liquid-filling valve is connected by snap joint with concrete grouting pipe, note Air during slurry in steel pipe is discharged under the effect of concrete grout hydraulic coupling by steam vent, is mixed when continuity occurs in steam vent When solidifying soil paste hydrorrhea goes out, show that steel pipe is completely filled with by concrete, can now stop slip casting operation.
Described hydraulic jack device is to be configured with manometric cylindrical hydraulic jack, described cylindrical hydraulic pressure Jack can be directly placed at steel pipe upper end and stay the height set as in 3 cm stopper slot.
Described hydraulic jack is connected by emulsion delivery pipe with the emulsion power pack being arranged on roadway floor, is led to Over emulsfication pump station provides power for the piston movement of hydraulic jack.
A kind of construction method for realizing above-mentioned concrete filled steel tube pier stud gob side entry retaining active support structure, specific method step It is as follows:
(1)According to design requirement construction steel pipe performance of concrete column confined;
(2)Hydraulic jack is placed in stopper slot reserved at the top of the concrete filled steel tube pier stud for completion of having constructed, adjustment Position, make hydraulic jack as far as possible with back holding level.
(3)Start emulsion power pack and start feed flow.Emulsion injects the process of hydraulic jack by emulsion delivery pipe It is middle to need to observe the pressure gauge being installed in hydraulic jack at any time, when pressure gauge reading reaches 1MPa, stop pressurization, first Secondary application setting load process terminates.
(4)Above-mentioned steps are circulated, until all concrete filled steel tube pier stud active support structures have 1MPa setting load.
(5)Between every two days after, secondary pressure is carried out to all hydraulic jack, stopped when pressure gauge reading reaches 2MPa Only pressurize.So far, whole concrete filled steel tube pier stud active support structure construction is completed, and the reading that now pressure gauge is shown is final The setting load of offer.At this point it is possible to which the rubber hose being connected with injected hole of dismantling, stays and does next round performance of concrete column confined work progress In use.
The step(1)The method of middle construction steel pipe performance of concrete column confined is as follows:
A, leveling is carried out to the roadway floor of previously selected construction location, by cored screw by the injected hole on steel pipe With rubber hose(1 connection.The steel pipe of rubber hose will be connected according to injected hole, steam vent position upward along head-room After direction is erect, it is close to outer wall of steel pipe and is evenly arranged 3 hydraulic props along steel pipe ring, described hydraulic prop should Injected hole and steam vent are avoided, in order to avoid influence normal slip casting operation;
Whether B, inspection concrete grouting pump and concrete grouting pipe are normal.Concrete is noted by snap joint after all going well Slurry pipe is connected with the rubber hose other end, completes preparation.
C, startup concrete grouting pump, concrete is injected in steel pipe.With the injection of concrete slurry, the sky in steel pipe Gas is discharged by steam vent, when staying the exhaust outlet for being located at steel pipe top continuity concrete slurry spilling occur, stops slip casting.
D, the snap joint being connected with concrete grouting pipe one end of dismantling, concrete filled steel tube pier stud gob side entry retaining active support The construction of single concrete filled steel tube pier stud terminates in structure.
Described step(2)The erection sequence of middle hydraulic jack can be carried out according to the technical requirements of practice of construction link Appropriate adjustment, be specially:If head-room is too high or roof condition is complicated, to avoid in hydraulic jack work progress to construction The potential threat that personnel cause, can be in step(1)Set up before steel pipe, hydraulic jack is attached to is reserved in steel pipe in advance In the stopper slot at top.
Described step(5)In mention the size of the final setting load of secondary pressure and can be adjusted according to Practical Project condition It is whole, but it must be ensured that the final setting load applied is not higher than the same period intensity of concrete in concrete filled steel tube pier stud, to avoid Artificial damage is produced to concrete filled steel tube pillarwork.Meanwhile, if using quick setting early strength concrete, secondary pressure can be in concrete Pier stud construction is proceeded by for 8 hours after terminating.
It is the method have the advantage is capable of the passive protecting form of the traditional concrete filled steel tube gob side entry retaining of change Active support, can provide suitable setting load according to requirement of engineering, for overlying strata on cut-out gob side entry retaining goaf side in time Layer, forms the hardened structure of arc triangle and has great importance.Meanwhile, pass through the hydraulic jack installed in the stopper slot of steel pipe top The contact of concrete filled steel tube pier stud with back well is realized on the premise of the suitable setting load of offer is provided, it is possible to prevente effectively from The influence that roof delamination is caused to gob side entry retaining resistance to overturning.In addition, the supporting pressure gauge of hydraulic jack can be supervised in real time Survey the bearing capacity change feature of concrete filled steel tube pier stud, reduce it is special set the additional economic that pressure monitoring device is produced into This.
Brief description of the drawings
Fig. 1 is that the integral arrangement of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention and its construction method is shown It is intended to;
Fig. 2 is the concrete filled steel tube pier stud of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention and its construction method Overall structure diagram;
Fig. 3 is the steel pipe and hydraulic jack of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention and its construction method Push up connection diagram;
Fig. 4 is the injected hole and concrete of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention and its construction method The quick connected mode schematic diagram of Grouting Pipe;
Fig. 5 is the hydraulic prop frame of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention and its construction method If schematic diagram;
In figure:1- backs, 2- pressure gauges, 3- injected holes, 4- snap joints, 5- emulsion delivery pipes, 6- concrete groutings Pipe, 7- steel pipes, 8- concrete, 9- emulsion power packs, 10- work face goaf, 11- hydraulic jacks, 12- steam vents, 13- rubbers Glue flexible pipe, 14- concrete grouting pumps, 15- roadway floors, 17- circular steel plates, 18- cored screws, the unidirectional liquid-filling valves of 19-, 20- Stopper slot, 21- hydraulic props.
Embodiment
Technical scheme is described below in conjunction with the accompanying drawings, but claimed scope is not limited to institute State.
Shown in Fig. 1, concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention, including concrete filled steel tube Pier stud and hydraulic jack(11), concrete grouting pump(14)And emulsion power pack(9).Wherein it is located at work face goaf(10) The concrete filled steel tube pier stud of side is by steel pipe(7)And concrete(8)Combine.Roadway floor(15)On be disposed with emulsion pump Stand(9)With concrete grouting pump(14).Emulsion power pack(9)Pass through emulsion delivery pipe(5)To being installed on pressure gauge(2)Liquid Press jack(11)Power is provided.Described hydraulic jack(11)It is installed in steel pipe(7)Top, one end and back (1)Connection.Concrete grouting pump(14)Pass through concrete grouting pipe(6)To steel pipe(7)Middle injection concrete(8).Concrete is noted Slurry pipe(6)Pass through snap joint(4)With rubber hose(13)Connection, rubber hose(13)The other end and injected hole(3)Connection.When Concrete slurry is from steam vent(12)When continuity is overflowed, show steel pipe(7)Inside it has been completely filled with concrete(8).
Shown in Fig. 2, the hydraulic jack of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention (11)Diameter compares steel pipe(7)Small 5 cm of internal diameter.Described steel pipe(7)Upper and lower ends are welded with two circular steels of size identical Plate(17), wherein upper end circular steel plate(17)It is welded on apart from steel pipe(7)Use top edge 3cm position, the position vacated To lay hydraulic jack(11).Steel pipe(7)Upper end is installed with injected hole(3)And steam vent(12), steam vent(12)Position Higher than injected hole(3).In concrete filled steel tube pier stud work progress, steel pipe(7)In air pass through steam vent(12)Discharge.It is actual Pressure gauge can will be installed in operating process(2)Hydraulic jack(11)It is directly placed at steel pipe(7)The circle of upper end Steel plate(17)On.
Shown in Fig. 3, pressure gauge is configured with(2)Hydraulic jack(11)It is placed on steel pipe(7)The reserved height in top is 3 Cm stopper slot(20)In, lower end is with being welded on steel pipe(7)The circular steel plate of upper end(17)Contact.Wherein hydraulic jack (11)Diameter compare steel pipe(7)The small 5cm of internal diameter.
Shown in Fig. 4, the injected hole of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention(3)With mixing Solidifying soil Grouting Pipe(6)Quickly connected mode is specially:Injected hole(3)Outside is welded with can be by the hollow spiral shell of concrete slurry Silk(18), built-in threaded rubber hose(13)One end and cored screw(18)Connection, the other end passes through snap joint(4)With Concrete grouting pipe(6)Connection.Described rubber hose(13)Medium position is installed on unidirectional liquid-filling valve(19), can prevent from mixing Solidifying soil slurry reflux.
Shown in Fig. 5, the hydraulic prop of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention (21)It is close to steel pipe(7)Outer wall is along steel pipe(7)Ring is evenly arranged 3.
As shown in Figures 1 to 5, the construction party of concrete filled steel tube pier stud gob side entry retaining active support structure of the present invention Method mainly includes:(1)According to design requirement construction steel pipe performance of concrete column confined, first to roadway floor(15)Carry out leveling, By being welded on steel pipe(7)Injected hole(3)On cored screw(18)By injected hole(3)With rubber hose(13)Connection.Afterwards, By steel pipe(7)Along perpendicular to back(1)And roadway floor(15)The direction of line is erected, and is close to steel pipe(7)Outside Along steel pipe(7)Ring uniformly installs 3 hydraulic props(21).Check concrete grouting pump(14)With concrete grouting pipe (6)It is whether normal.After all going well, pass through snap joint(4)By concrete grouting pipe(6)With rubber hose(13)Connection, it is complete Into preparation.Start concrete pump(14)Start slip casting.Steel pipe is located at when staying(7)The steam vent on top(12)There is continuity When concrete slurry overflows, stop slip casting.Dismantle and concrete grouting pipe(6)The snap joint of one end connection(4), steel tube concrete The construction of concrete filled steel tube pier stud terminates in knoll post gob side entry retaining active support structure;(2)Will be with pressure gauge(2)Hydraulic pressure thousand Jin top(11)It is placed on steel pipe in the concrete filled steel tube pier stud for completion of having constructed(7)The stopper slot at top(20)In, adjust position Put, make hydraulic jack(11)As far as possible with back(1)Holding level;(3)Start emulsion power pack(9)Start to supply Liquid.Emulsion passes through emulsion delivery pipe(5)Inject hydraulic jack(11)During at any time observation be installed in hydraulic jack Top(11)On pressure gauge(2), work as pressure gauge(2)When reading reaches 1MPa, stop pressurization, apply setting load process knot for the first time Beam;(5)Above-mentioned steps are circulated, until all concrete filled steel tube pier stud active support structures have 1MPa setting load.(7)Between After every two days, to hydraulic jack(11)Secondary pressure is carried out, works as pressure gauge(2)Reading stops pressurization when reaching 2MPa.Extremely This, whole concrete filled steel tube pier stud active support structure construction is completed, now the setting load finally to provide.Described step (2)The erection sequence of middle hydraulic jack can suitably be adjusted according to the technical requirements of practice of construction link, be specially:If Head-room is too high or roof condition is complicated, to avoid hydraulic jack(11)That workmen is caused in work progress is potential Threaten, can be in step(1)Set up steel pipe(7)Before, in advance by hydraulic jack(11)It is attached to and is reserved in steel pipe(7)Top Stopper slot(20)In.Described step(5)In mention the size of the final setting load of secondary pressure can be according to Practical Project bar Part is adjusted, but it must be ensured that the final setting load applied is not higher than concrete in concrete filled steel tube pier stud(8)The same period Intensity, to avoid producing artificial damage to concrete filled steel tube pillarwork.Meanwhile, if using quick setting early strength concrete, it is secondary to apply Pressure can be proceeded by for 8 hours after performance of concrete column confined construction terminates.

Claims (9)

1. concrete filled steel tube pier stud gob side entry retaining active support structure, it is characterised in that:Including concrete filled steel tube pier stud and hydraulic pressure Jack(11), concrete grouting pump(14)And emulsion power pack(9)Composition, described concrete filled steel tube pier stud is by steel pipe(7) With the concrete of inside filling(8)Composition, the outside steel pipe of described concrete filled steel tube pier stud(7)To be installed with slip casting except top Hole(3)And steam vent(12)Outer round steel pipe closed at both ends(7), described hydraulic jack(11)To pass through emulsion pump (14)The cylindrical hydraulic jack of power is provided.
2. concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 1, it is characterised in that:Steam vent (12)Position is higher than injected hole(3), injected hole(3)Outside is welded with can be by the cored screw of concrete slurry(18), it is interior Put threaded rubber hose(13)One end and cored screw(18)Connection, the other end passes through snap joint(4)Noted with concrete Slurry pipe(6)Connection.
3. concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 1, it is characterised in that:Described rubber Glue flexible pipe(13)Medium position is installed on unidirectional liquid-filling valve(19), can prevent concrete slurry from flowing back.
4. concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 1, it is characterised in that:Described rubber Glue flexible pipe(13)Medium position is installed on unidirectional liquid-filling valve(19), can prevent concrete slurry from flowing back.
5. concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 1, it is characterised in that:Hydraulic jack Top(11)Diameter compares steel pipe(7)Small 5 cm of internal diameter, steel pipe that can be with concrete filled steel tube pier stud(7)Realize quick connection.
6. concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 4, it is characterised in that:Described liquid Press jack(11)By being arranged in roadway floor(15)On emulsion power pack(9)Through emulsion delivery pipe(5)Power is provided.
7. it is a kind of realize the concrete filled steel tube pier stud gob side entry retaining active support structure as described in claim 1 to 5 any one Construction method, it is characterised in that:(1)According to design requirement construction steel pipe performance of concrete column confined, first to roadway floor(15)Carry out Leveling, by being welded on steel pipe(7)Injected hole(3)On cored screw(18)By injected hole(3)With rubber hose(13) Connection, by steel pipe(7)Along perpendicular to back(1)And roadway floor(15)The direction of line is erected, and is close to steel pipe(7) Outside is along steel pipe(7)Ring uniformly installs 3 hydraulic props(21), check concrete grouting pump(14)And concrete grouting Pipe(6)It is whether normal, after all going well, pass through snap joint(4)By concrete grouting pipe(6)With rubber hose(13)Connection, Preparation is completed, starts concrete pump(14)Start slip casting, steel pipe is located at when staying(7)The steam vent on top(12)Occur continuous Property concrete slurry overflow when, stop slip casting, dismantle and concrete grouting pipe(6)The snap joint of one end connection(4), steel pipe mix The construction of concrete filled steel tube pier stud terminates in solidifying knoll post gob side entry retaining active support structure;(2)Will be with pressure gauge(2)Hydraulic pressure Jack(11)It is placed on steel pipe in the concrete filled steel tube pier stud for completion of having constructed(7)The stopper slot at top(20)In, adjustment Position, makes hydraulic jack(11)As far as possible with back(1)Holding level;(3)Start emulsion power pack(9)Start to supply Liquid, emulsion passes through emulsion delivery pipe(5)Inject hydraulic jack(11)During at any time observation be installed in hydraulic jack Top(11)On pressure gauge(2), work as pressure gauge(2)When reading reaches 1MPa, stop pressurization, apply setting load process knot for the first time Beam;(5)Above-mentioned steps are circulated, until all concrete filled steel tube pier stud active support structures have 1MPa setting load;(7)Between After every two days, to hydraulic jack(11)Secondary pressure is carried out, works as pressure gauge(2)Reading stops pressurization when reaching 2MPa, extremely This, whole concrete filled steel tube pier stud active support structure construction is completed, now the setting load finally to provide.
8. the construction method of concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 6, it is characterised in that: Described step(2)The erection sequence of middle hydraulic jack can be adjusted according to the requirement of practice of construction link, be specially: If head-room is too high or roof condition is complicated, to avoid hydraulic jack(11)That workmen is caused in work progress is latent Threatening, can be in step(1)Set up steel pipe(7)Before, in advance by hydraulic jack(11)It is attached to and is reserved in steel pipe(7)Top The stopper slot in portion(20)In.
9. the construction method of concrete filled steel tube pier stud gob side entry retaining active support structure as claimed in claim 6, it is characterised in that: Described step(5)In mention the size of the final setting load of secondary pressure and can be adjusted according to Practical Project condition, still It must assure that the final setting load of application is not higher than concrete in concrete filled steel tube pier stud(8)Same period intensity, to avoid to steel Pipe concrete pillarwork produces artificial damage, if using quick setting early strength concrete, secondary pressure can construct in performance of concrete column confined Proceed by within 8 hours after end.
CN201710383198.XA 2017-05-26 2017-05-26 Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method Pending CN107060876A (en)

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CN201710383198.XA CN107060876A (en) 2017-05-26 2017-05-26 Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method

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Application Number Priority Date Filing Date Title
CN201710383198.XA CN107060876A (en) 2017-05-26 2017-05-26 Concrete filled steel tube pier stud gob side entry retaining active support structure and its construction method

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CN107060876A true CN107060876A (en) 2017-08-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109595029A (en) * 2018-11-16 2019-04-09 山东科技大学 Goaf partial stowage supporting structure and its construction method under the conditions of tight roof
CN110130896A (en) * 2019-06-26 2019-08-16 中国矿业大学 A kind of working face pillar filling mining method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109595029A (en) * 2018-11-16 2019-04-09 山东科技大学 Goaf partial stowage supporting structure and its construction method under the conditions of tight roof
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
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
CN110130896A (en) * 2019-06-26 2019-08-16 中国矿业大学 A kind of working face pillar filling mining method

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