CN217270269U - Temporary supporting structure for soft rock roadway - Google Patents
Temporary supporting structure for soft rock roadway Download PDFInfo
- Publication number
- CN217270269U CN217270269U CN202221231222.0U CN202221231222U CN217270269U CN 217270269 U CN217270269 U CN 217270269U CN 202221231222 U CN202221231222 U CN 202221231222U CN 217270269 U CN217270269 U CN 217270269U
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- China
- Prior art keywords
- anchor rod
- group
- soft rock
- anchor
- temporary
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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.)
- Expired - Fee Related
Links
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 47
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 8
- 239000002023 wood Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 16
- 238000005553 drilling Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract description 2
- 230000001427 coherent effect Effects 0.000 abstract 1
- 230000005641 tunneling Effects 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a soft rock tunnel temporary support structure, including tunnel body and coal wall, the top of tunnel body is including permanent section and the sky top of strutting, and the top of permanent section and sky top of strutting has all seted up multiunit stock eye group. The temporary supporting structure for the soft rock roadway is simple in operation method, has no difference with a normal construction anchor net support, does not need special training for personnel, ensures construction quality, is strong and coherent in linkage with other subsequent procedures, has no intermediate barrier, can greatly improve the construction efficiency of the temporary support for the roadway, enables the installation time of the total temporary support to be controlled within 10 minutes, saves a large amount of time, improves work efficiency, and utilizes tools such as an anchor drilling machine operating handle and a long shovel during construction, the operator always stands under a safe top plate of the existing support for construction, and the quick installation method of the anchor rod is matched to stop the phenomenon of overhead operation, and the temporary support can be used as a permanent support after being subjected to pre-tightening and drawing tests.
Description
Technical Field
The utility model belongs to the technical field of the roadway support, specifically speaking relates to a temporary supporting construction in soft rock tunnel.
Background
The roadway temporary support is a temporary support which is erected before the permanent support is erected on a tunneling working face in roadway construction to maintain roadway safety and working space, so that the safety of tunneling construction personnel is protected. The main temporary support modes include an organic load type temporary support, a metal front canopy temporary support and a single hydraulic prop matched cantilever beam temporary support.
The soft rock roadway generally adopts a semicircular arch or a circular section so as to better enhance the self-stability of the roof, an onboard temporary support device is adopted, the roof cannot be effectively connected, a certain gap exists between the roadway profile and the temporary support device as well as between the roadway profile and the metal mesh, the temporary support effect cannot be achieved, in addition, the probability of once forming of the soft rock roadway is low, in order to ensure the safe operation of anchor mesh support workers, the fully-mechanized excavating machine needs to withdraw from the excavating head after cutting is completed, and the advantages of onboard temporary support are not obvious; the temporary support of the metal forepoling beam is more applicable to roadway construction with stable coal (rock) layer and small stress, but the forepoling beam has small initial supporting force, cannot effectively support a top plate, has slow supporting speed and causes long exposure time of surrounding rock at the top; the single hydraulic prop is matched with a cantilever beam for temporary support, the method is simple and easy to implement, but as a tunneling working face does not have a special hydraulic pump, clear water for tunneling is generally used for replacing emulsion, the initial supporting force is low, the prop is easy to rust, and the initial supporting force of the single hydraulic prop is difficult to meet the design requirement when the single hydraulic prop is arranged on the floating slag of the roadway. In addition, during the erection of the single hydraulic prop, the personnel is in the empty top operation in a non-support state.
In view of this special the utility model is put forward.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model adopts the technical scheme that:
the utility model provides a soft rock tunnel temporary support structure, includes tunnel body and coal wall, the top of tunnel body includes permanent support section and sky top, and the top of permanent support section and sky top has all seted up multiunit stock eye group, each group the stock eye group is including the first stock eye that is located the centre, the second stock eye and the third stock eye that are located both sides, and stock eye group interpolation is equipped with the stock, the top of tunnel body is provided with rhombus metal mesh group, and rhombus metal mesh group includes first rhombus metal mesh and second rhombus metal mesh, fix through fixed subassembly between the top of first rhombus metal mesh and permanent support section, the stock is inserted and is established in rhombus metal mesh group, and fixes through strutting the accessory between rhombus metal mesh group and the stock.
The fixing component is an anchor net cable-jet support.
The support accessory comprises a metal tray sleeved at the tail of the anchor rod, the tail of the anchor rod is in threaded connection with a quick mounting nut, an anti-wear washer is arranged between the quick mounting nut and the metal tray, and the anti-wear washer is sleeved on the side wall of the anchor rod.
And a mixed wood supporting plate is arranged between the metal tray and the rhombic metal net set, and the mixed wood supporting plate is sleeved on the side wall of the anchor rod.
The anchor rod eye group is internally inserted with a double-speed resin cartridge, and the anchor rod is inserted in the double-speed resin cartridge.
The stock adopts the levogyration and does not have the screw-thread steel stock of indulging the muscle, and the diameter of stock is not less than 20 mm.
Compared with the prior art, the utility model following beneficial effect has:
the utility model discloses can make tunnel temporary support efficiency of construction improve greatly, make the long control of total temporary support installation within 10 minutes, practice thrift the plenty of time, improve the work efficiency.
The utility model discloses operating method is simple, and strut the free from extraneous with normal construction anchor net, personnel need not special training, and construction quality is secure, and links up with other subsequent handling cohesion strong, does not have middle obstacle.
The utility model discloses when the construction, utilize anchor rod drill operating handle, instrument such as long-handle spade, operating personnel stands all the time and is under the safe roof that has strutted, and the quick installation method of cooperation stock has stopped the empty top operation phenomenon.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
In the drawings:
fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic sectional view of the present invention;
fig. 3 is the structure schematic diagram of the middle anchor rod and the support accessory of the present invention.
In the figure: 1-a construction platform; 2-anchor net support worker; 3-permanent support section; 4-a drilling machine nest; 5-anchor drilling machine; 6-empty top; 7-a first bolt eye; 8-double-speed resin medicated rolls; 9-a first diamond wire mesh; 10-anchor rod; 11-miscellaneous tree pallets; 12-a metal tray; 13-a friction reducing washer; 14-quick mounting of the nut; 15-coal wall; 16-a second bolt eye; 17-a third anchor eye; 18-a roadway body; 19-second diamond wire mesh.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention.
As shown in fig. 1 to 3, a temporary supporting structure of a soft rock roadway comprises a roadway body 18 and a coal wall 15, wherein the top of the roadway body 18 comprises a permanent supporting section 3 and an empty roof 6, a plurality of anchor rod eye groups are arranged on the tops of the permanent supporting section 3 and the empty roof 6, the row spacing of each anchor rod eye group is the same and is not more than 800mm, the distance between each anchor rod eye group is the same and is not more than 800mm, each anchor rod eye group comprises a first anchor rod eye 7 positioned in the middle, a second anchor rod eye 16 and a third anchor rod eye 17 positioned on two sides, the first anchor rod eye 7 is positioned in the middle of the empty roof 6, an anchor rod 10 is inserted in each anchor rod eye group, a diamond-shaped metal mesh group is arranged on the top of the roadway body 18 and comprises a first diamond-shaped metal mesh 9 and a second diamond-shaped metal mesh 19, the second diamond-shaped metal mesh 19 is networked with the first diamond-shaped metal mesh 9 of the permanent supporting section 3, the connection adopts a net edge self-connection process, the number of the net-connection buttons is not less than 10 buttons/m, the size is required to cover the whole empty roof area 6, the rhombic metal net group is a rhombic wire net, the diameter is not less than 10#3.658mm, the mesh is 30mm multiplied by 30mm, the size is required to cover the whole empty roof area, the net edge self-connection process is adopted, the first rhombic metal net 9 and the top of the permanent support section 3 are fixed through a fixing component, the anchor rod 10 is inserted in the rhombic metal net group, and the rhombic metal net group and the anchor rod 10 are fixed through support accessories, the operation method is simple, the operation method is not different from that of a normal construction anchor net support, personnel does not need special training, the construction quality is guaranteed, the connection performance with other subsequent processes is strong and continuous, no intermediate barrier exists, the temporary support construction efficiency of a roadway can be greatly improved, the total temporary support installation time is controlled within 10 minutes, the anchor rod quick mounting method saves a large amount of time, improves the working efficiency, and utilizes tools such as an operation handle of the anchor rod drilling machine, a long-handle shovel and the like during construction, an operator always stands under the existing supported safety top plate for construction, the phenomenon of empty top operation is avoided by matching with the quick mounting method of the anchor rod, the anchor rod quick mounting method is suitable for soft rock tunnels with the circular advancing ruler being not more than 800mm, and the section of the soft rock tunnel is circular or semicircular arch.
The fixing component is an anchor net cable-jet support, and the fixing effect of the first diamond-shaped metal net 9 is guaranteed.
The supporting accessory comprises a metal tray 12 which is sleeved on the tail portion of the anchor rod 10, the tail portion of the anchor rod 10 is in threaded connection with a quick installation nut 14, an antifriction washer 13 is arranged between the quick installation nut 14 and the metal tray 12, compared with a common nut, the quick installation nut 14 is provided with a top cover, the opening torque is 100 N.m, the antifriction washer 13 is sleeved on the side wall of the anchor rod 10, the second diamond-shaped metal net 19 is conveniently tightly attached to the hollow top 6, and the roof protecting effect is achieved.
The miscellaneous tree layer board 11 is arranged between the metal tray 12 and the diamond metal net group, the size of the miscellaneous tree layer board 11 is not less than 200mm multiplied by 60mm long multiplied by width multiplied by thickness, and the miscellaneous tree layer board 11 is sleeved on the side wall of the anchor rod 10, so that the function of yielding can be achieved.
The anchor rod eye group is internally inserted with the double-speed resin cartridge 8, the anchor rod 10 is inserted in the double-speed resin cartridge 8 and respectively comprises an ultrafast CK cartridge and a medium-speed Z cartridge or a fast K cartridge and a medium-speed Z cartridge, and the anchoring lengths of the two cartridges reach more than 90% of the effective length of the full-length anchoring anchor rod 10, so that the anchor rod 10 is inserted in the anchor rod eye group to be fastened more, and the anchoring is facilitated.
The anchor rod 10 is a left-handed non-longitudinal rib threaded steel anchor rod, the diameter of the anchor rod 10 is not smaller than 20mm, the yield strength is not lower than 335MPa, and the strength is guaranteed.
When in use, firstly, the roadway body 18 finishes a cutting footage to form a hollow top 6, a construction platform 1 is leveled by using a cutting head of a roadheader, an anchor net support worker 2 stands on a permanent support section 3, the anchor net cable is completely supported, tools such as a long shovel are used under a top plate in a range encircled by a solid line in figure 1, a jumbolter nest 4 is dug out on a coal rock mass in the middle of the tunneling head, the jumbolter 5 is obliquely sent into the jumbolter nest 4 from a rear lane, a drill rod is embedded, the jumbolter 5 is supported by using an operation handle of the jumbolter, and a first jumbolter eye 7 in the middle of the range encircled by a dotted line in figure 1 of the hollow top 6 is quickly constructed;
after the first anchor rod hole 7 is formed, ejecting the double-speed resin explosive cartridges 8, namely the quick K cartridges and the medium-speed Z cartridges into the fundus of the first anchor rod hole 7 by using an anchor rod drilling machine, laying a top plate second diamond-shaped metal net 19 on the inner side of the quick K cartridges, installing anchor rods 10 prepared in advance in the first anchor rod hole 7, sequentially sleeving the miscellaneous wood supporting plates 11, the metal trays 12, the antifriction washers 13 and the quick mounting nuts 14 on the anchor rods 10 in advance, stirring the double-speed resin explosive cartridges 8 by using the anchor rod drilling machine 5 through the quick mounting nuts 14, stopping stirring after 30s and waiting for about 30s, then screwing the quick mounting nuts 14 by using the anchor rod drilling machine 5 in cooperation with a torque amplifier, opening a top cover, and continuously screwing until the designed pre-tightening force is reached;
the second diamond-shaped metal net 19 is tightly attached to the empty roof 6 under the fixation of the anchor rod group and the miscellaneous tree supporting plate 11 to play a role in protecting the roof, the prepared second diamond-shaped metal net 19 and the anchor rod 10 are installed in place at one time by adopting a quick installation method, and are networked with the first diamond-shaped metal net 9 of the permanent supporting section 3, the connection adopts a net edge self-networking process, the number of networking buckles is not less than 10 buckles/m, and the size requirement covers the whole area of the empty roof 6;
by the same method, the construction angle of the anchor rod drilling machine 5 can be adjusted under the condition that the anchor rod drilling machine 5 is not moved, the second anchor rod eye 16 and the third anchor rod eye 17 are constructed in sequence, the steps are repeated, the anchoring of the anchor rods 10 in the anchor rod eye group is completed, and the networking and the construction of the anchor rods 10 on the two sides of the center of the empty roof 6 are operated in parallel;
after the construction of the three right anchor rods 10 and the second diamond-shaped metal mesh 19 in the hollow top 6 is completed, a temporary supporting structure of the roadway body 18 is formed, the temporary supporting structure is suitable for a soft rock roadway with a circulating feed ruler not larger than 800mm, and the section of the temporary supporting structure is circular or semicircular arch.
Claims (6)
1. The utility model provides a soft rock tunnel temporary support structure, includes tunnel body (18) and coal wall (15), its characterized in that, the top of tunnel body (18) includes permanent support section (3) and empty roof (6), and the top of permanent support section (3) and empty roof (6) has all seted up multiunit stock eye group, each group the stock eye group is including being located middle first stock eye (7), being located the second stock eye (16) and the third stock eye (17) of both sides, and stock eye group interpolation is equipped with stock (10), the top of tunnel body (18) is provided with rhombus metal mesh group, and rhombus metal mesh group includes first rhombus metal mesh (9) and second rhombus metal mesh (19), fix through fixed subassembly between the top of first rhombus metal mesh (9) and permanent support section (3), stock (10) are inserted and are established in rhombus metal mesh group, and the rhombic metal net group and the anchor rod (10) are fixed through a supporting accessory.
2. The soft rock roadway temporary support structure of claim 1, wherein the fixing assembly is an anchor wire-jet support.
3. The temporary supporting structure of the soft rock roadway according to claim 1, wherein the supporting accessories comprise a metal tray (12) which is sleeved at the tail of the anchor rod (10), the tail of the anchor rod (10) is in threaded connection with a quick mounting nut (14), an antifriction washer (13) is arranged between the quick mounting nut (14) and the metal tray (12), and the antifriction washer (13) is sleeved on the side wall of the anchor rod (10).
4. The temporary supporting structure of the soft rock roadway according to claim 3, wherein a mixed wood supporting plate (11) is arranged between the metal tray (12) and the rhombic metal net group, and the mixed wood supporting plate (11) is sleeved on the side wall of the anchor rod (10).
5. The soft rock roadway temporary support structure of claim 1, wherein a two-speed resin cartridge (8) is inserted into the anchor bolt eye group, and the anchor bolt (10) is inserted into the two-speed resin cartridge (8).
6. The temporary supporting structure of the soft rock roadway according to claim 1, wherein the anchor rod (10) is a left-handed non-longitudinal bar deformed steel bar anchor rod, and the diameter of the anchor rod (10) is not less than 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221231222.0U CN217270269U (en) | 2022-05-18 | 2022-05-18 | Temporary supporting structure for soft rock roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221231222.0U CN217270269U (en) | 2022-05-18 | 2022-05-18 | Temporary supporting structure for soft rock roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217270269U true CN217270269U (en) | 2022-08-23 |
Family
ID=82886226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221231222.0U Expired - Fee Related CN217270269U (en) | 2022-05-18 | 2022-05-18 | Temporary supporting structure for soft rock roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217270269U (en) |
-
2022
- 2022-05-18 CN CN202221231222.0U patent/CN217270269U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220823 |
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| CF01 | Termination of patent right due to non-payment of annual fee |