CN203308513U - Closed energy absorption structure of convex cage goaf - Google Patents
Closed energy absorption structure of convex cage goaf Download PDFInfo
- Publication number
- CN203308513U CN203308513U CN2013203678563U CN201320367856U CN203308513U CN 203308513 U CN203308513 U CN 203308513U CN 2013203678563 U CN2013203678563 U CN 2013203678563U CN 201320367856 U CN201320367856 U CN 201320367856U CN 203308513 U CN203308513 U CN 203308513U
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- goaf
- tunnel
- cage shape
- steel mesh
- ring wall
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- 238000010521 absorption reaction Methods 0.000 title abstract 4
- 239000004575 stone Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 claims description 11
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 230000002411 adverse Effects 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model discloses a closed energy absorption structure of a convex cage goaf, and belongs to the field of management of a mine goaf. The energy absorption structure is a tu-shaped (tu is a Chinese character and means convex) cage frame formed by steel meshes in a welding manner and filled by dimension stones; concrete retention walls are built at the front and rear walls of the cage frame structure; a rubber drainage pipe is buried at the right-lower corner of a tunnel, clung to the ground, and is through in the goaf. By adopting the closed energy absorption structure, a strong air blast wave generated by catastrophic collapse of a carrier plate of the goaf can be effectively prevented or weakened, and is weakened to a safe state after passing through the structure. Thus, the adverse effects, caused by the strong air blast wave, on the safety production are avoided; the safety of a corresponding area is improved; the safety production of a mine is ensured.
Description
Technical field
The utility model relates to the sealing of goaf, mining area, is specially the method for the sealing of a kind of goaf and energy-absorbing, belongs to mine worked-out section and administers technical field.
Background technology
The long-time weathering of process and stresses re-distribution, goaf top plate there will be to collapse to be emitted, and then forms powerful air-shock wave in goaf, and energy is huge, if carry out close the goaf, to the bearing capacity of enclosing wall, requires high.Therefore, in case gob collapse, the powerful air-shock wave formed can directly act on enclosing wall, and along with collapsing, emits degree to strengthen, and the air impact force of formation also can increase, and the safety of enclosing wall is difficult to guarantee.
Summary of the invention
The utility model purpose is to solve conventional art to adopt the enclosing wall close the goaf, and safety is difficult to the problem guaranteed.
Sealing endergonic structure in a kind of convex cage shape goaf is characterized in that: by " protruding " body cage shape framework that the steel mesh welding forms, fill and form with piece stone; " protruding " body cage shape framework is not less than 20m apart from goaf, utilizes Φ 8mm steel mesh to be welded; The outstanding structure division of " protruding " body lies low towards goaf, and left and right sides steel mesh reinforcement is embedded in the ring wall groove of tunnel, and both sides, front and back steel mesh reinforcement is to be welded after stone filling; Be close to concreting waterwall before and after this cage shape frame construction, and towards the goaf direction, the lower right corner close proximity to ground in tunnel is embedded with the straight-through goaf of rubber drain, its water inlet is close to the concrete waterwall.
The steel mesh reinforcement mesh density of described cage shape frame construction is 10cm * 10cm, and the minimum diameter size of the piece stone of filling is not less than 10cm, and filling part will exist gap; The high 50cm of described concrete waterwall, thickness 30cm, rubber drain diameter are Φ 20cm, connect whole goaf sealing endergonic structure, its water inlet diameter 30cm.
The job practices of a kind of convex cage shape as above goaf sealing endergonic structure is characterized in that:
1. seal the endergonic structure location: outside the gob collapse band, be not less than the addressing of 20m place apart from goaf, according to the size finishing tunnel of this sealing endergonic structure, do early-stage preparations for laying this structure welding steel mesh;
2. the excavation of tunnel ring wall groove: be not less than (2L1+20) m place in the distance goaf, along the tunnel surrounding, be 1m towards away from the goaf direction, excavating deeply, wide is L1, girth is the ring wall groove of C, afterwards tunnel ring wall groove is reinforced, so that the laying of bar frame afterwards welding is with fixing; Wherein determining of L1 value determined by formula L1=A/C, and in formula, A represents the shearing area of air impact force shear failure, and L1 represents the width of tunnel ring wall groove, and C represents tunnel ring wall groove girth;
3. pre-buried rubber drain: the direction towards goaf, the material of burying a Φ 20cm at the lower right corner, tunnel close proximity to ground is the gutter of rubber, port leads to goaf;
4. building and the excavation of the water inlet in nearly goaf of the laying steel mesh of cage shape framework welding and nearly goaf concrete waterwall: transport Φ 8mm steel mesh in tunnel, lay towards the goaf direction.The mesh density of take is welded and fixed rack as the specification of 10cm * 10cm is first in the ring wall groove, then to the goaf direction, lay; In level, stretch out the ring wall groove wide for the L1 place turns up rack, and at this, be close to rack and erect high 50cm, thickness is the waterwall of 30cm, makes it to be a with tunnel is wide, and is close to waterwall and leaves the water inlet that a diameter is 30cm, turns back afterwards and sets up steel net structure;
5. the filling of piece stone: start from nearly goaf direction filling piece stone, piece stone minimum diameter is not less than 10cm, progressively back filling, and assurance piece stone is full of and connects top, until fill up, stone filling hockets with the laying steel mesh reinforcement that turns back;
6. seal the last sealing of endergonic structure: after treating that piece stone fill area is filled up, utilize steel mesh reinforcement finally to seal this structure, form an integral body to guarantee cage shape framework and institute's stone filling; Wherein interface welding overlap length is not less than 1m, and the girth in the vertical section of sealing endergonic structure is not less than (4L1+2h+5) m.
Before and after the utility model part, length is L1, and its purpose is to guarantee that this structure can stop the shearing resistance of air-shock wave to be impacted when being subject to powerful air-shock wave.The cuboid partial-length protruded is also L1, and its height and width are equal to the high h in tunnel and wide a size.Wherein embed wall inner structure part, its length L 1 basis is as follows:
1. according to The Ideal-Gas Equation, under constancy of temperature, the volume of certain mass gas and the product of pressure equal to weigh, that is:
PV=P
0V
0
In formula, P---compressed air pressure during the instantaneous inbreak of large tracts of land top board, units MPa;
P
0---the front goaf of the instantaneous inbreak of large tracts of land top board inner air pressure, i.e. atmospheric pressure: P
0≈ 0.1MPa;
V---compressed volume of air during the instantaneous inbreak of large tracts of land top board, the m of unit
3
V
0---the front goaf of the instantaneous inbreak of large tracts of land top board inner volume, the m of unit
3.
②
In formula, S
0---unsettled area in goaf, m
2
M---mining height, m;
Inbreak area of S---goaf large tracts of land, m
2
H
0---height, m.
Order: m=H
0, η=S/S
0, and P
0=0.1MPa(standard atmospheric pressure), have:
③
In formula, v---the initial flow speed when compressed air is gone out goaf, the m/s of unit;
γ---atmospheric density, units/kg/m
3
G---acceleration of gravity, m/s
2.
4. drift section A
1Upper impact force F is:
F=k
dρv
2A
1
Wherein, A
1=ah;
K
d---the resistance coefficient of air flow in laneway;
ρ=γ；
The shearing area A of air impact force shear failure:
A=F/P
P---the shear strength of this sealing endergonic structure
Try to achieve L1=A/C
Described its effect of stone is that air-shock wave is played to barrier effect to reach endergonic effect.And can be by air-shock wave and discharge in time in gap, the air-shock wave after energy weakens is in a safe condition.
Its effect of described rubber drain is to discharge the ponding occurred in tunnel, while avoiding ponding to pass through this sealing endergonic structure, reduces the corrosiveness of underground water to this structure.
In case described its effect of concrete waterwall when to be the tunnel internal water accumulation more, can stop ponding on the one hand, stop on the other hand ponding to flow into this sealing endergonic structure, thereby reduction underground water is to the corrosion of this structure.
The sealing endergonic structure in this kind goaf, because the zone of filling at piece stone exists gap, air-shock wave can pass through piece stone fill area.When air-shock wave passed through, due to the drag effect of piece stone, most energy of air-shock wave can be absorbed, and then made air-shock wave discharge by endergonic structure with the state of a kind of less energy, safety.In goaf top plate collapsed and emits process, the portion gas of goaf air-shock wave was discharged in time by pressure release passage, thus the safety problem that the strong air-shock wave that has reduced to form because subsiding produces.
The accompanying drawing explanation
Fig. 1 is a kind of goaf sealing of the utility model endergonic structure longitudinal sectional drawing.
Reference numeral is: 1-concrete waterwall; 2-embeds the wall internal construction; 3-projective structure part; 4-piece stone; 5-cage shape framework; 6-tunnel ring wall groove; The 7-water inlet; The 8-rubber drain; The 9-pressure release passage; The 10-goaf.
Fig. 2 is goaf sealing endergonic structure drawing in side sectional elevation.
The specific embodiment
For further describing the utility model, below in conjunction with accompanying drawing, a kind of goaf sealing of the utility model endergonic structure is described further.
A kind of goaf sealing described in the utility model and endergonic structure, as shown in Figure 1, 2, this structure adopts sealing, and described " sealing " is to fill by piece stone (4) structure of ventilating formed, and this structure is not less than 20m apart from goaf.
In conjunction with Fig. 1,2, following has been the construction process of this endergonic structure:
1. seal the endergonic structure location: outside goaf (10) subside band, be not less than the addressing of 20m place apart from goaf, according to the size finishing tunnel of this sealing endergonic structure, do early-stage preparations for laying this structure welding steel mesh.
2. the excavation of tunnel ring wall groove (6): as shown in Figure 1, 2, in distance goaf (10), be not less than (2L1+20) m place, along the tunnel surrounding, be 1m towards away from the goaf direction, excavating deeply, wide is L1, girth is the ring wall groove of C, afterwards tunnel ring wall groove is reinforced, so that the laying of bar frame afterwards welding is with fixing.
3. pre-buried rubber drain (8): the direction of (10) towards goaf, the material of burying a Φ 20cm at the lower right corner, tunnel close proximity to ground is the gutter (8) of rubber, port leads to goaf (10).
4. building and the excavation of the water inlet (7) in nearly goaf of the laying steel mesh of cage shape framework (5) welding and nearly goaf (10) concrete waterwall (1): transport Φ 8mm steel mesh in tunnel, (10) direction is laid towards goaf.The mesh density of take is welded and fixed rack as the specification of 10cm * 10cm is first in ring wall groove (6), then (10) direction is laid to goaf.In level, stretch out ring wall groove (6) wide for turning up rack in the L1 place, and at this, be close to rack and erect high 50cm, thickness is the waterwall (1) of 30cm, make it and the wide a of being in tunnel, and be close to waterwall (1) and leave the water inlet that a diameter is 30cm (7), turn back afterwards and set up steel net structure.
5. the filling of piece stone (4): start from nearly goaf direction filling piece stone (minimum diameter is not less than 10cm), progressively back filling, assurance piece stone (4) is full of and connects top, until fill up zone as shown in Figure 1, stone filling (4) hockets with the laying steel mesh reinforcement that turns back.
6. seal the last sealing of endergonic structure: after treating that piece stone (4) fill area is filled up, utilize steel mesh reinforcement finally to seal this structure, form an integral body to guarantee cage shape framework (5) and institute's stone filling (4).Wherein interface welding overlap length is not less than 1m.Therefore, as shown in Figure 1 the girth in vertical section of this endergonic structure should not be less than (4L1+2h+5) m.
7. building away from goaf direction concrete waterwall (1): after treating that this structure has been sealed, at endergonic structure, erect high 50cm away from the goaf end, thickness is the concrete waterwall (1) of 30cm, and is close to the water inlet (7) that this waterwall (1) digging diameter is 30cm.
Claims (4)
1. a convex cage shape goaf sealing endergonic structure, is characterized in that: by " protruding " body cage shape framework (5) that the steel mesh welding forms, fill and form with piece stone (4); " protruding " body cage shape framework is not less than 20m apart from goaf (10), utilizes Φ 8mm steel mesh to be welded; (10) lie low the outstanding structure division (3) of " protruding " body towards goaf, and left and right sides steel mesh reinforcement is embedded in tunnel ring wall groove (6), and both sides, front and back steel mesh reinforcement is to be welded after stone filling; Be close to this cage shape frame construction front and back concreting waterwall (1), and in (10) direction towards goaf, the lower right corner close proximity to ground in tunnel is embedded with the straight-through goaf (10) of rubber drain (8), and its water inlet (7) is close to concrete waterwall (1).
2. endergonic structure is sealed in a kind of convex cage shape as claimed in claim 1 goaf, it is characterized in that: the steel mesh reinforcement mesh density of described cage shape framework (5) structure is 10cm * 10cm, the minimum diameter size of the piece stone (4) of filling is not less than 10cm, and filling part will exist gap; The high 50cm of described concrete waterwall (1), thickness 30cm, rubber drain (8) diameter is Φ 20cm, connects whole goaf sealing endergonic structure, its water inlet (7) diameter 30cm.
3. endergonic structure is sealed in a kind of convex cage shape as claimed in claim 1 goaf, it is characterized in that: the excavation of tunnel ring wall groove (6) is to be not less than (2L1+20) m place in distance goaf (10), along the tunnel surrounding, be 1m towards away from the goaf direction, excavating deeply, wide is L1, girth is the ring wall groove of C, afterwards tunnel ring wall groove is reinforced, wherein determining of L1 value determined by formula L1=A/C, in formula, A represents the shearing area of air impact force shear failure, L1 represents the width of tunnel ring wall groove, and C represents tunnel ring wall groove girth.
4. a kind of convex cage shape as claimed in claim 1 goaf sealing endergonic structure, is characterized in that steel mesh reinforcement interface welding overlap length is not less than 1m, and the girth in the vertical section of sealing endergonic structure is not less than (4L1+2h+5) m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203678563U CN203308513U (en) | 2013-06-25 | 2013-06-25 | Closed energy absorption structure of convex cage goaf |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203678563U CN203308513U (en) | 2013-06-25 | 2013-06-25 | Closed energy absorption structure of convex cage goaf |
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| Publication Number | Publication Date |
|---|---|
| CN203308513U true CN203308513U (en) | 2013-11-27 |
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ID=49614728
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|---|---|---|---|
| CN2013203678563U Expired - Lifetime CN203308513U (en) | 2013-06-25 | 2013-06-25 | Closed energy absorption structure of convex cage goaf |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306724A (en) * | 2013-06-25 | 2013-09-18 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN105114029A (en) * | 2015-08-19 | 2015-12-02 | 中煤科工集团西安研究院有限公司 | Water plugging method for poor sealing borehole in mine laneway |
-
2013
- 2013-06-25 CN CN2013203678563U patent/CN203308513U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306724A (en) * | 2013-06-25 | 2013-09-18 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN103306724B (en) * | 2013-06-25 | 2015-07-08 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN105114029A (en) * | 2015-08-19 | 2015-12-02 | 中煤科工集团西安研究院有限公司 | Water plugging method for poor sealing borehole in mine laneway |
| CN105114029B (en) * | 2015-08-19 | 2017-06-13 | 中煤科工集团西安研究院有限公司 | A kind of shutoff method of the bad drilling of mine laneway inner sealing |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131127 Effective date of abandoning: 20150708 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131127 Effective date of abandoning: 20150708 |
|
| RGAV | Abandon patent right to avoid regrant |