CN216767407U - Roadway surrounding rock integrated coupling supporting device - Google Patents
Roadway surrounding rock integrated coupling supporting device Download PDFInfo
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- CN216767407U CN216767407U CN202220353456.6U CN202220353456U CN216767407U CN 216767407 U CN216767407 U CN 216767407U CN 202220353456 U CN202220353456 U CN 202220353456U CN 216767407 U CN216767407 U CN 216767407U
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Abstract
The utility model belongs to the technical field of roadway surrounding rock supporting, and particularly relates to an integrated roadway surrounding rock coupling supporting device which comprises a primary-spraying supporting net rack, a supporting net plate frame, a supporting connecting layer, an anchor rope and a grouting anchor rod; the periphery of the primary-spraying support net rack is provided with a plurality of grouting anchor rods, the top of the primary-spraying support net rack is provided with an anchor rope, the inner side of the primary-spraying support net rack is connected with a support net plate frame through a support connecting layer, and the lower parts of the two ends of the primary-spraying support net rack are inserted into the bottom of the terrace. The grouting anchor rod performs full-face grouting on surrounding rocks of the roadway and then hangs a net; installing grouting anchor rods at the top, the side and the bottom corner; a supporting mesh plate frame is connected and arranged through a supporting connecting layer for supporting; by optimizing the surrounding rock structure, the surrounding rock strength is improved, and the integration of load homogenization and support is realized through the coupling of the support body and the surrounding rock in strength, rigidity and structure, so that the overall stability of deep roadway engineering is ensured.
Description
Technical Field
The utility model belongs to the technical field of roadway surrounding rock supporting, and particularly relates to an integrated roadway surrounding rock coupling supporting device.
Background
After the deep tunnel engineering rock mass is excavated, the deep tunnel engineering rock mass is in a plastic large deformation stage, the rock mass in the deep tunnel engineering rock mass is in a three-high state (namely high ground stress, high temperature and high pore water pressure), the geological condition is worsened, and the traditional support theory, design method and technology developed on the basis of shallow mining are difficult to adapt to the requirements of deep soft rock tunnel support. At present, the phenomena of 'digging before and repairing after and repairing and repeated renovation' often occur in a deep soft rock tunnel, the maintenance cost is high, the length of an anchor rod is too long, and the waste is caused. Whether the support problem of the deep soft rock roadway can be solved is one of the key problems of development of coal mining to deep parts and safe production in China. The deep soft rock roadway adopts the traditional U-shaped steel, I-shaped steel support, anchor net cable or anchor grouting support, the production requirements are difficult to meet, the general coupling support form (anchor net cable coupling, anchor net cable U-shaped steel frame coupling and the like) is adopted, the support cost is high, the support effect is not ideal, and the steel frame support effect is usually failure if the steel frame is crushed. The main reason is that rigidity, strength and structure are not coupled between the supporting bodies and surrounding rocks, so that roadway deformation is aggravated and is difficult to control.
The deep engineering stability integrated coupling control technology is that aiming at the nonlinear mechanical characteristics of a deep engineering rock mass, a deep engineering stability control principle is followed, a deep engineering large deformation mechanical design method is adopted, on the basis of engineering geomechanics evaluation, the surrounding rock strength is improved by optimizing the structure of the surrounding rock, and the load homogenization and support integration is realized by coupling a support body and the surrounding rock in strength, rigidity and structure, so that the overall stability of deep roadway engineering is ensured.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides an integrated coupling supporting device for surrounding rocks of a roadway, wherein a grouting anchor rod is used for performing full-section grouting on the surrounding rocks of the roadway and then hanging a net; installing grouting anchor rods at the top, the side and the bottom corner; a supporting net plate frame is connected and arranged through a supporting connecting layer for supporting; by optimizing the structure of the surrounding rock, the strength of the surrounding rock is improved, and by coupling the supporting body with the surrounding rock in strength, rigidity and structure, the integration of load homogenization and supporting is realized, so that the overall stability of deep tunnel engineering is ensured; the engineering supporting material is saved, the construction cost is reduced, and the waste is reduced. The method is simple, easy to implement, safe and economical, good in supporting effect and wide in practicability.
In order to achieve the purpose, the utility model provides the following technical scheme: an integrated coupling supporting device for surrounding rocks of a roadway comprises a primary-spraying supporting net rack, a supporting connecting layer, an anchor cable, a grouting anchor rod and a terrace; a plurality of grouting anchor rods are arranged on the periphery of the primary-spraying support net rack, an anchor rope is arranged on the top of the primary-spraying support net rack, the inner side of the primary-spraying support net rack is connected with a support net plate frame through a support connecting layer, and the lower parts of the two ends of the primary-spraying support net rack are inserted into the bottom of the terrace; concrete grout is injected into the grouting anchor rod.
Preferably, the grouting anchor rod consists of a threaded anchor rod, a baffle plate, an anchor rod tail, a tray and a grout stop plug; a threaded anchor rod and an anchor rod tail are respectively arranged at two ends of the grouting anchor rod, a grouting cavity is arranged in the middle of the grouting anchor rod, a grouting hole is formed above the grouting cavity, a grout stop plug is arranged on the threaded anchor rod, and a tray is arranged on the end head of the threaded anchor rod through a nut; a baffle is arranged between the grouting anchor rod and the anchor rod tail.
Preferably, an expanded foam support layer is arranged inside the support connection layer.
Preferably, the anchor cable is provided with two anchor cables.
Preferably, the bottom of the supporting screen plate frame is arranged on the ground, and the supporting screen plate frame is detachable through the supporting connecting layer.
Preferably, the lower parts of the two ends of the primary-spraying supporting net rack are inserted to the position 500mm away from the bottom of the terrace.
Preferably, the grouting anchor rods at the bottom ends of the two sides of the primary spraying support net rack are arranged at an angle of 45 degrees with the floor.
Compared with the prior art, the utility model has the beneficial effects that:
the grouting anchor rod performs full-face grouting on surrounding rocks of the roadway and then hangs a net; installing grouting anchor rods at the top, the side and the bottom corner; a supporting mesh plate frame is connected and arranged through a supporting connecting layer for supporting; by optimizing the structure of the surrounding rock, the strength of the surrounding rock is improved, and by coupling the supporting body with the surrounding rock in strength, rigidity and structure, the integration of load homogenization and supporting is realized, so that the overall stability of deep tunnel engineering is ensured; the engineering supporting material is saved, the construction cost is reduced, and the waste is reduced. The method is simple, easy to implement, safe and economical, good in supporting effect and wide in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of an integrated coupling supporting device for surrounding rocks of a roadway according to the utility model;
FIG. 2 is a schematic structural diagram of a grouting anchor rod in the roadway surrounding rock integrated coupling supporting device;
fig. 3 is a schematic structural view of a primary-blasting supporting net rack in the roadway surrounding rock integrated coupling supporting device;
fig. 4 is a schematic structural diagram of a supporting mesh plate frame in the roadway surrounding rock integrated coupling supporting device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
Referring to fig. 1-4, the present invention provides the following technical solutions: an integrated coupling supporting device for surrounding rocks of a roadway comprises a primary-spraying supporting net rack 1, a supporting net rack 2, a supporting connecting layer 3, an anchor cable 4, a grouting anchor rod 5 and a terrace 6; a plurality of grouting anchor rods 5 are arranged on the periphery of the primary-spraying support net rack 1, an anchor rope 4 is arranged on the top of the primary-spraying support net rack 1, the inner side of the primary-spraying support net rack 1 is connected with a support net rack 2 through a support connecting layer 3, and the lower parts of two ends of the primary-spraying support net rack 1 are inserted into the bottom of a terrace 6; concrete grout is injected into the grouting anchor rod 5.
Specifically, the grouting anchor rod 5 consists of a threaded anchor rod 51, a baffle plate 52, an anchor rod tail 53, a tray 54 and a grout stop plug 57; the two ends of the grouting anchor rod 5 are respectively provided with a threaded anchor rod 51 and an anchor rod tail 53, the middle part of the grouting anchor rod 5 is provided with a grouting cavity, a grouting hole 55 is arranged above the grouting cavity, the threaded anchor rod 51 is provided with a grout stop plug 57, and the end of the threaded anchor rod 51 is provided with a tray 54 through a nut 56; a baffle 52 is arranged between the grouting bolt 5 and the bolt tail 53.
Specifically, an expansion foam supporting layer is arranged inside the supporting and connecting layer 3.
Specifically, the number of the anchor cables 4 is two.
Specifically, support 2 bottoms of grillage and set up on terrace 6, support grillage 2 and can dismantle through supporting connecting layer 3.
Specifically, the lower parts of the two ends of the primary-spraying supporting net rack 1 are inserted to the 500mm position of the bottom of the terrace 6.
Specifically, the grouting anchor rods 5 on the bottom ends of the two sides of the primary spraying support net rack 1 and the floor 6 are arranged at an angle of 45 degrees.
The grouting anchor rod 5 is a hollow steel pipe and is divided into a thread section, a grouting section and an anchoring section, and grouting holes 55 which are distributed in a cross mode are drilled in the grouting section.
The length of the grouting anchor rod is 1/3-1/2 of the roadway span generally, and the length of the rod body is 2500mm according to the section size and the deformation condition of the roadway to be tested. The external 100mm has thread rolling, the hole sealing section is 500mm long, the middle grouting section is 1600mm long, and the internal 300mm is processed into a right-handed twist shape for stirring the resin anchoring agent. The pipe is manufactured by welding pipes with national standard YB242-63 phi 24 multiplied by 2500; in order to prevent grout from leaking out during grouting, a grouting section is positioned in the middle of the anchor rod, so that grouting is performed in the deep part of the surrounding rock, the grouting effect is improved, the length of the grouting section is 1600mm, and the length of the hole sealing section is 500 mm; the grouting hole is a passage for grouting to enter surrounding rock of the roadway from the inner cavity of the anchor rod, the smaller the diameter of the grouting hole is, the larger the resistance is when grouting flows, the larger the hole diameter is, and the larger the strength loss of the rod body is. In order to facilitate the discharge of grout from the inner cavity of the anchor rod, 15 grouting holes with the diameter phi of 6mm are drilled on a grouting section of a rod body of 1600mm in a staggered mode every 100 mm; the screw thread with the length of 100mm needs to be processed at the tail part of the anchor rod, the effect of the screw thread is that the anchor rod is conveniently connected with a high-pressure slurry outlet pipe of a grouting pump, the requirement of installing a supporting plate is met, and the screw thread at the tail part of the anchor rod needs to be processed by thread rolling.
The working principle and the using process of the utility model are as follows: when the utility model is used, workers firstly spray concrete on the full section of the roadway of the primary spray supporting net rack 1, wherein the thickness of the concrete is 30mm, so as to seal surrounding rocks; a 2.5m long grouting anchor rod is used for grouting the whole section of the surrounding rock of the roadway, then the net is hung, the mesh is a reinforcing mesh formed by welding phi 6mm reinforcing steel bars, the mesh is required to be welded point by point, and the integrity is good; the lapping length between the meshes is 100-200 mm. Firstly, connecting a top net, and then connecting a side net and a bottom net; installing a top anchor rod: and (3) utilizing an anchor rod drilling machine to drill a roof bolt hole and quickly installing the anchor rod, wherein the tightening torque is 150-200 N.m, and the pre-tightening force of the anchor rod is not less than 8 t.
Installing an upper anchor rod: and (3) utilizing an anchor rod drilling machine to drill an anchor rod hole at the upper part and quickly installing the anchor rod, wherein the tightening torque is 150-200 N.m, and the pre-tightening force of the anchor rod is not less than 8 t.
Anchor rod of angle of bottoming: and (5) utilizing an air hammer to strike the anchor eye of the bottom angle. The bottom angle anchor rod adopts a pipe seam type anchor rod, the pipe diameter phi is 43mm, the wall thickness is 2.3mm, the length is L1600mm, and after the installation, a deformed steel bar anchor rod is inserted and is filled with cement paste.
Anchoring a grommet: and (4) drilling a top anchor eye by using the anchor rod drilling machine and quickly installing the anchor cable, wherein the pretightening force of the anchor cable is not less than 10 t.
Re-spraying: and (4) after the installation of the anchor rods and the anchor cables and the laying of the reinforcing mesh meet the design requirements, carrying out full-section re-spraying of the concrete in the roadway. And finally, the supporting net plate frame 2 is connected and arranged for supporting through the supporting connection layer 3.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a tunnel country rock integration coupling supporting device which characterized in that: the device comprises a primary spraying support net rack (1), a support net rack (2), a support connecting layer (3), an anchor cable (4), a grouting anchor rod (5) and a terrace (6); a plurality of grouting anchor rods (5) are arranged on the periphery of the primary-spraying support net rack (1), an anchor rope (4) is arranged on the top of the primary-spraying support net rack (1), the inner side of the primary-spraying support net rack (1) is connected with a support net plate frame (2) through a support connecting layer (3), and the lower parts of two ends of the primary-spraying support net rack (1) are inserted into the bottom of a terrace (6); concrete grout is injected into the grouting anchor rod (5).
2. The roadway surrounding rock integrated coupling supporting device according to claim 1, characterized in that: the grouting anchor rod (5) consists of a threaded anchor rod (51), a baffle (52), an anchor rod tail (53), a tray (54) and a grout stop plug (57); a threaded anchor rod (51) and an anchor rod tail (53) are respectively arranged at two ends of the grouting anchor rod (5), a grouting cavity is arranged in the middle of the grouting anchor rod (5), a grouting hole (55) is arranged above the grouting cavity, a grout stop plug (57) is arranged on the threaded anchor rod (51), and a tray (54) is arranged on the end of the threaded anchor rod (51) through a nut (56); a baffle plate (52) is arranged between the grouting anchor rod (5) and the anchor rod tail (53).
3. The roadway surrounding rock integrated coupling supporting device according to claim 1, characterized in that: an expansion foam supporting layer is arranged in the supporting and connecting layer (3).
4. The roadway surrounding rock integrated coupling supporting device according to claim 1, characterized in that: the number of the anchor cables (4) is two.
5. The integrated coupling supporting device for the surrounding rocks of the roadway according to claim 1, characterized in that: support grillage (2) bottom setting on terrace (6), support grillage (2) and can dismantle through supporting connecting layer (3).
6. The roadway surrounding rock integrated coupling supporting device according to claim 1, characterized in that: the lower parts of the two ends of the primary-spraying supporting net rack (1) are inserted to the 500mm position of the bottom of the terrace (6).
7. The roadway surrounding rock integrated coupling supporting device according to claim 1, characterized in that: the grouting anchor rods (5) on the bottom ends of the two sides of the primary spraying support net rack (1) are arranged at an angle of 45 degrees with the terrace (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220353456.6U CN216767407U (en) | 2022-02-22 | 2022-02-22 | Roadway surrounding rock integrated coupling supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220353456.6U CN216767407U (en) | 2022-02-22 | 2022-02-22 | Roadway surrounding rock integrated coupling supporting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216767407U true CN216767407U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220353456.6U Active CN216767407U (en) | 2022-02-22 | 2022-02-22 | Roadway surrounding rock integrated coupling supporting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216767407U (en) |
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2022
- 2022-02-22 CN CN202220353456.6U patent/CN216767407U/en active Active
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