CN220134024U - Tunnel end baffle strutting arrangement - Google Patents
Tunnel end baffle strutting arrangement Download PDFInfo
- Publication number
- CN220134024U CN220134024U CN202321697119.XU CN202321697119U CN220134024U CN 220134024 U CN220134024 U CN 220134024U CN 202321697119 U CN202321697119 U CN 202321697119U CN 220134024 U CN220134024 U CN 220134024U
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- CN
- China
- Prior art keywords
- steel bar
- roadway
- flexible membrane
- membrane bag
- end baffle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 230000008093 supporting effect Effects 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 14
- -1 gangue Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 6
- 238000005065 mining Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a roadway end baffle supporting device which comprises an anchor rod, wherein the anchor rod is arranged at the end part of a roadway, a flexible membrane bag is arranged on the anchor rod, a prestressed reinforcement structure for providing stress is arranged at the rear part of the flexible membrane bag, and grouting materials are filled in the flexible membrane bag; the prestress steel bar structure comprises a first steel bar and a second steel bar, and the first steel bar is connected with the second steel bar through a sleeve. The roadway end baffle supporting device with the structure can fill the flexible membrane bag with crushed rock, coal gangue and cement and fly ash transported outwards, reduce cost, and then install the prestressed reinforcement on the inner wall side of the roadway end, so as to play a role in stably supporting the flexible membrane bag, and reduce labor intensity of workers.
Description
Technical Field
The utility model relates to the technical field of roadway support, in particular to a roadway end baffle support device.
Background
Underground mining of coal mines requires that a large number of roadways are dug underground, and roadway smoothness and surrounding rock stability can be ensured by adopting roadway supports. The basic purpose of supporting the roadway is to alleviate and reduce the movement of surrounding rocks, so that the section of the roadway is not excessively reduced, and scattered and destroyed surrounding rocks are prevented from falling down. The effect of roadway support is not only dependent on the supporting force of the support itself, but also is influenced by a series of factors such as the nature of surrounding rock, the mechanical nature of the support (supporting force and contractibility), the installation density of the support, the time for installing the support, the installation quality of the support, the contact mode (point contact or surface contact) with the surrounding rock and the like.
In general, in order to make the roadway support play a positive role in adjusting and controlling the deformation process of surrounding rocks, the support should be installed before the surrounding rocks are loosened and damaged, so that the support plays a bearing role together with the surrounding rocks under the condition that the surrounding rocks still have self-supporting force, but not the surrounding rocks are loosened and damaged, and the support is used for bearing the weight of the caving rock blocks under the condition that the self-supporting force is almost completely lost. That is, the support should be co-loaded with the surrounding rock under mutually constrained and interdependent conditions.
The deep mining is large in ground pressure, the continuous mining and continuous filling process of the roadway is difficult to operate, and the roadway grouting baffle wall is easy to break and the filling material is easy to leak when the underground deep filling mining is performed at present. The tightness and strength of the baffle are insufficient during grouting filling, and the continuous mining and continuous filling efficiency is easily reduced.
The safety of baffle wall support during roadway filling grouting is one of the problems affecting the benefit of coal mines, and finding a device capable of enabling a roadway grouting end baffle to maintain good strength and stability under the condition of large ground pressure is a key for ensuring the continuous mining continuous filling working efficiency of the coal mines.
Disclosure of Invention
The utility model aims to provide a supporting device for end baffles of a roadway, which solves the problem of how to fully utilize a rock mass of the roadway and a filling wall formed by grouting and filling a flexible film bag to solve the end baffle supporting.
In order to achieve the aim, the utility model provides a roadway end baffle supporting device which comprises an anchor rod, wherein the anchor rod is arranged at the end part of a roadway, a flexible membrane bag is arranged on the anchor rod, a prestressed reinforcement structure for providing stress is arranged behind the flexible membrane bag, and grouting materials are filled in the flexible membrane bag; the prestress steel bar structure comprises a first steel bar and a second steel bar, and the first steel bar is connected with the second steel bar through a sleeve.
Preferably, one end of the first reinforcing steel bar is connected with the wall of the roadway, the other end of the first reinforcing steel bar is connected with one end of the second reinforcing steel bar through a sleeve, and the other end of the second reinforcing steel bar is connected with the wall of the roadway.
Preferably, the first steel bar and the second steel bar are connected with the sleeve through threads.
Preferably, the section of the roadway is rectangular.
Preferably, the grouting material is rock, gangue, cement and fly ash in the tunnel.
Preferably, the flexible membrane bag is a foldable flexible membrane bag, and reinforcing ribs for supporting are arranged in the flexible membrane bag.
A roadway end baffle supporting method comprises the following steps:
firstly, hanging a flexible membrane bag at the end part of a roadway by using an anchor rod: after the heading machine performs heading along the horizontal direction, the section of the tunnel is a rectangular section, and a flexible film bag is hung at one end of the tunnel.
Step two, mounting a prestressed reinforcement structure behind the flexible film bag: cutting off one steel bar into a first steel bar and a second steel bar, processing the end heads of the first steel bar and the second steel bar into threaded steel bars, connecting the first steel bar and the second steel bar by using a sleeve, and driving the sleeve into a roadway wall. The sleeve is tightened so that the rebar provides stress support to the flexible film bag.
Step three, filling grouting materials in the flexible membrane bag: the grouting material of the flexible membrane bag can be made of rock, gangue and cement and fly ash which are left in the flexible membrane bag during tunneling. After the grouting material is solidified, the grouting material is matched with an anchor rod to ensure the structural stability of the baffle formed by filling the flexible membrane bag.
Therefore, the roadway end baffle supporting device with the structure changes the roadway continuous mining continuous filling end baffle supporting device in the prior art, fully utilizes broken rock, coal gangue and cement and fly ash from the outside to fill into the flexible film bag, reduces cost and is more environment-friendly. The prestressed reinforcement is arranged on the inner wall side of the end head of the roadway, so that the flexible membrane bag is supported, and the supporting strength is enhanced. The utility model is suitable for being applied under the condition of large ground pressure, and can improve the working efficiency by matching with the continuous mining and continuous filling process, so that the filling grouting is more stable, the transportation cost of supporting equipment can be reduced, and the labor intensity of workers is reduced.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of an embodiment of a roadway end baffle support device of the present utility model;
fig. 2 is a schematic diagram of a connection of reinforcing steel bars and sleeves of an embodiment of a supporting device for a roadway end baffle plate according to the present utility model;
FIG. 3 is a schematic diagram of reinforcement of prestressed reinforcement of an embodiment of a roadway end baffle support device according to the present utility model;
fig. 4 is a schematic view of a tunnel cross-section of an embodiment of a tunnel end shield support device according to the present utility model.
Fig. 5 is a schematic view of a flexible membrane bag structure of an embodiment of a roadway end baffle support device according to the present utility model.
Reference numerals
1. A bolt; 2. a first reinforcing steel bar; 3. a second reinforcing steel bar; 4. a sleeve; 5. grouting materials; 6. a tunnel section; 7. flexible film bags.
Detailed Description
The technical scheme of the utility model is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Examples
FIG. 1 is a schematic view of the overall structure of an embodiment of a roadway end baffle support device of the present utility model; fig. 2 is a schematic diagram of a connection of reinforcing steel bars and sleeves of an embodiment of a supporting device for a roadway end baffle plate according to the present utility model;
FIG. 3 is a schematic diagram of reinforcement of prestressed reinforcement of an embodiment of a roadway end baffle support device according to the present utility model; FIG. 4 is a schematic view of a cross-sectional view of a roadway end baffle support apparatus according to an embodiment of the present utility model; fig. 5 is a schematic view of a flexible membrane bag structure of an embodiment of a roadway end baffle support device according to the present utility model.
As shown in the figure, the supporting device for the end baffle of the roadway comprises an anchor rod 1, wherein the anchor rod 1 is arranged at the end part of the roadway, and a flexible membrane bag 7 is arranged on the anchor rod 1. The tunnel section 6 is rectangular. The flexible membrane bag 7 is a foldable flexible membrane bag, is similar to a rectangular section air duct, can be folded and placed when not in use, and can be pulled up to be used when in use.
The rear of the flexible membrane bag 7 is provided with a prestressed reinforcement structure for providing stress. The prestress steel bar structure comprises a first steel bar 2 and a second steel bar 3, and the first steel bar 2 and the second steel bar 3 are connected through a sleeve 4. One end of the first steel bar 2 is connected with the wall of the roadway, the other end of the first steel bar 2 is connected with one end of the second steel bar 3 through the sleeve 4, and the other end of the second steel bar 3 is connected with the wall of the roadway. External threads are arranged on the first steel bar 2 and the second steel bar 3, internal threads are arranged in the sleeve 4, and the first steel bar 2 and the second steel bar 3 are in locking connection with the sleeve 4 through threads.
The soft film bag 7 is filled with grouting material 5. The grouting material 5 is rock, gangue, cement and fly ash in the tunnel.
The flexible membrane bag 7 is provided with the reinforcing steel bars, so that a certain supporting effect can be achieved during hanging, and the prestressed reinforcing steel bar structure is mainly restrained from moving backwards when the flexible membrane bag 7 is placed behind. After the grouting material 5 is solidified, the flexible membrane bag 7 forms a wall, and the rear prestressed reinforcement structure plays a supporting role.
A roadway end baffle supporting method comprises the following steps:
firstly, hanging a flexible membrane bag 7 at the end part of a roadway by using an anchor rod 1: after the heading machine performs heading along the horizontal direction, the section 6 of the roadway is a rectangular section, the rectangular section is a section vertical to the working surface, and a flexible film bag 7 is hung at one end of the roadway.
By the technical means, a simple baffle preliminary model is formed.
Step two, the installation of a prestress steel bar structure is carried out behind the flexible film bag 7: cutting off one steel bar into a first steel bar 2 and a second steel bar 3, processing the end heads of the first steel bar 2 and the second steel bar 3 into threaded steel bars, connecting the first steel bar 2 with the second steel bar 3 by using a sleeve 4, and driving the steel bars into a roadway wall. The sleeve 4 is tightened so that the pre-stressed rebar provides stress support to the flexible membrane bag 7.
Through the technical means, the flexible membrane bag 7 and the prestressed reinforcement structure are used in the tunneled roadway space, and the supporting and supporting effects of the tensile stress reinforcement on the flexible membrane bag 7 are achieved through cooperation.
Step three, filling grouting material 5 in the flexible membrane bag 7: the grouting material 5 of the flexible membrane bag 7 can be made of rock, gangue and cement and fly ash which are left in the flexible membrane bag during tunneling. After the grouting material 5 is solidified, the grouting material is matched with the anchor rod 1 to ensure the structural stability of the baffle formed by filling the flexible membrane bag 7.
And installing the anchor rod 1, filling and supporting, and screwing up to reach the pretightening force after the grouting material 5 is solidified. The purpose is to provide stability and safety in the construction operation process for the two sides and the top plate of the roadway and the anchor rod 1 in the next step.
Through the technical means, the stability and the safety of the roadway during roadway filling operation can be realized, meanwhile, leakage of materials is prevented, and the continuous mining and continuous filling efficiency is improved.
Therefore, the roadway end baffle supporting device with the structure can fill the flexible membrane bag with crushed rock, coal gangue and cement and fly ash transported outwards, reduce cost, and then install the prestressed reinforcement on the inner wall side of the roadway end, so as to play a role in stably supporting the flexible membrane bag, and reduce labor intensity of workers.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.
Claims (6)
1. The utility model provides a tunnel end baffle strutting arrangement which characterized in that: the anchor rod is arranged at the end part of a roadway, a flexible membrane bag is arranged on the anchor rod, a prestressed reinforcement structure for providing stress is arranged at the rear of the flexible membrane bag, and grouting materials are filled in the flexible membrane bag; the prestress steel bar structure comprises a first steel bar and a second steel bar, and the first steel bar is connected with the second steel bar through a sleeve.
2. The roadway end baffle support apparatus of claim 1, wherein: one end of the first reinforcing steel bar is connected with the wall of the roadway, the other end of the first reinforcing steel bar is connected with one end of the second reinforcing steel bar through a sleeve, and the other end of the second reinforcing steel bar is connected with the wall of the roadway.
3. The roadway end baffle support apparatus of claim 1, wherein: the first steel bar and the second steel bar are connected with the sleeve through threads.
4. The roadway end baffle support apparatus of claim 1, wherein: the section of the roadway is rectangular.
5. The roadway end baffle support apparatus of claim 1, wherein: the grouting material is rock, gangue, cement and fly ash in the tunnel.
6. The roadway end baffle support apparatus of claim 1, wherein: the flexible membrane bag is a foldable flexible membrane bag, and reinforcing ribs with supporting function are arranged in the flexible membrane bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697119.XU CN220134024U (en) | 2023-06-30 | 2023-06-30 | Tunnel end baffle strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321697119.XU CN220134024U (en) | 2023-06-30 | 2023-06-30 | Tunnel end baffle strutting arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220134024U true CN220134024U (en) | 2023-12-05 |
Family
ID=88961345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321697119.XU Active CN220134024U (en) | 2023-06-30 | 2023-06-30 | Tunnel end baffle strutting arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220134024U (en) |
-
2023
- 2023-06-30 CN CN202321697119.XU patent/CN220134024U/en active Active
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