CN220748306U - Deep-shallow coupling stable anchoring device for large-span composite top plate - Google Patents
Deep-shallow coupling stable anchoring device for large-span composite top plate Download PDFInfo
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- CN220748306U CN220748306U CN202322188872.2U CN202322188872U CN220748306U CN 220748306 U CN220748306 U CN 220748306U CN 202322188872 U CN202322188872 U CN 202322188872U CN 220748306 U CN220748306 U CN 220748306U
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- 238000004873 anchoring Methods 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 230000008878 coupling Effects 0.000 title claims abstract description 27
- 238000010168 coupling process Methods 0.000 title claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 27
- 230000008093 supporting effect Effects 0.000 claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims 3
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model relates to the field of roadway support, in particular to a depth-to-depth coupling stable core anchoring device for a large-span composite top plate. The shallow reinforcing device comprises three grouting anchor rods, the flexible supporting device comprises an elastic hollow base plate, a steel belt and a diamond-shaped net, and the composite top plate comprises a crushing area, a separation layer area and a non-crushing area; the shallow part reinforcing device is positioned in the crushing area, and the deep part anchoring device penetrates through the crushing area and the separation area and is anchored in the non-crushing area; the flexible supporting device connects the deep anchoring device with the shallow reinforcing device on the surface of the crushing area of the composite top plate to form a depth coupling stable anchoring device; the composite roof supporting structure can be optimized through the combination of the plurality of deep and shallow coupling stable core anchoring devices, and the coupling supporting of the shallow crushing area and the deep non-crushing area of the large-span composite roof is realized, so that the span-reducing supporting of the large-span composite roof is realized.
Description
Technical Field
The utility model relates to the field of roadway support, in particular to a depth coupling stable anchoring device for a large-span composite top plate.
Background
In recent years, in order to improve the tunneling speed of the roadway, reduce the cost of forming the roadway, meet the requirements of high yield and high efficiency of modern large-scale mines, the section and span of the stoping roadway are continuously increased, the stability of a roadway top plate is reduced along with the increase, the control difficulty of the top plate is also continuously increased, and sometimes, the main factors of roof fall accidents of the stoping roadway of the anchor rod support are even caused, so that the life safety of underground personnel is seriously threatened. The mining depth of the mine is larger and larger, and particularly, the deep large-section and large-span composite roof roadway influenced by structural stress has the defects of roof separation and serious damage, and the stability of the roof is difficult to control by adopting the conventional anchor net rope support for the composite large-span cut roof. The stability is obviously reduced with the increase of the span, and in order to maintain the stability of the engineering, a span reduction measure is required. The composite large-span cut-hole top plate cannot adopt a conventional supporting method, and the span must be reduced first and then supported. The key point of the composite type large-span cut-hole top plate is to find an effective span-reducing supporting method aiming at large-span cut-holes.
The prior Chinese patent with the publication number of CN201110218854.3 discloses a large-span cut-hole double micro-arch span-reducing supporting method, which adopts a secondary roadway forming, double micro-arch cross sections, anchor net ropes, single struts and hinged top beams span-reducing supporting mode, and solves the problem that a large-span rectangular cut-hole top plate is difficult to control; the prior Chinese patent with the authority of CN201110257950.9 discloses an asymmetric anchor net rope combined support method for a large-dip-angle coal seam special-shaped stoping roadway, which realizes the stability control of the combined asymmetric support method on the surrounding rock of the large-dip-angle coal seam special-shaped stoping roadway, greatly reduces the repairing times of the roadway and reduces the roadway support cost.
On the one hand, the span-reducing support method of the issued patent cannot well realize the coupling support of the shallow crushing region and the deep non-crushing region of the composite top plate, and on the other hand, cannot effectively strengthen the support effect of the large-span cut-off span-reducing support.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a deep-shallow coupling stable-core anchoring device for a large-span composite top plate, which comprises a deep anchoring device, a shallow reinforcing device, a flexible supporting device and a composite top plate. The shallow reinforcing device comprises three grouting anchor rods, the flexible supporting device comprises an elastic hollow base plate, a steel belt and a diamond-shaped net, and the composite top plate comprises a crushing area, a separation layer area and a non-crushing area; the shallow part reinforcing device is positioned in the crushing area, and the deep part anchoring device penetrates through the crushing area and the separation area and is anchored in the non-crushing area; the flexible supporting device connects the deep anchoring device with the shallow reinforcing device on the surface of the crushing area of the composite top plate to form a depth coupling stable anchoring device; the composite roof supporting structure can be optimized through the combination of the plurality of deep and shallow coupling stable core anchoring devices, and the coupling supporting of the shallow crushing area and the deep non-crushing area of the large-span composite roof is realized, so that the span-reducing supporting of the large-span composite roof is realized.
Further, the deep anchoring device is a prestressed anchor cable and comprises a first pre-tightening nut, an anchor ring, a gasket, a tray and an anchor cable body.
Further, the grouting anchor rod comprises a grouting plug, a second pre-tightening nut, an anchor backing plate, a grouting stop plug, a grouting hole and an anchor barb, wherein the grouting hole is used for grouting, so that the complete filling of a roadway crack is ensured, an anchor bearing point is formed in a shallow part crushing area of the composite roof, and the span reduction effect of anchor rod support is optimized; the anchoring barbs are used to optimize the anchoring effect of the whole device.
Further, the shallow portion reinforcing device comprises three grouting anchor rods which are symmetrically distributed at 120 degrees by taking the deep portion anchoring device as the center.
Furthermore, the deep-shallow coupling stable core anchoring device comprises a deep anchoring device and a shallow reinforcing device which are connected on the surface of a shallow crushing area of the composite top plate through a flexible supporting device to form a claw-shaped structure, so that the axial supporting range of a roadway is enlarged; the shallow grouting anchor rod is matched with the deep pre-stressed anchor rope, so that the shallow grouting anchor rod is prevented from shearing damage caused by instability of the pre-stressed anchor rope, and the deep pre-stressed anchor rope is prevented from stretching and breaking.
Furthermore, the deep-shallow coupling stable core anchoring device forms a conical supporting range in the large-span composite top plate, and achieves the effects of centering in a deep non-crushing area of the large-span composite top plate and supporting the stable core in a shallow crushing area of the large-span composite top plate.
Furthermore, the elastic hollow base plate is designed to be of a hollow structure, so that a certain supporting resistance can be provided for the whole device, a pressure yielding function is provided for dynamic load generated by deformation of broken surrounding rocks of the shallow part of the complex top plate, and the whole supporting effect of the device can be ensured through deformation of the elastic hollow base plate when the broken surrounding rocks of the shallow part of the complex top plate are deformed; the elastic hollow backing plate is designed with a conical groove with a large upper part and a small lower part, and is mutually matched with the grouting anchor rod slurry stopping plug, so that the grouting anchor rod is tightly combined with the elastic hollow backing plate.
Furthermore, the steel belt is provided with a plurality of conical grooves which are mutually matched with the grouting anchor rod slurry stopping plugs, so that a plurality of depth coupling anchoring devices are firmly connected and jointly act to achieve the effect of reducing the span.
The noun, conjunctive or adjective parts referred to in the above technical solutions are explained as follows:
the sliding connection means that two objects are contacted but not fixed, and the two objects can slide relatively;
the fixed connection means that the connecting pieces cannot move relatively.
The beneficial effects of the utility model are as follows:
(1) Grouting the cracks of the crushing area of the top plate through a shallow part reinforcing device to enable loose rock blocks to be connected to form an anchoring bearing point, and acting together with a deep part anchoring device penetrating through the crushing area and the separation area and anchored in a non-crushing area, wherein the shallow part grouting anchor rod prevents a deep part prestress anchor rope from being unstable to generate shearing damage, and the deep part prestress anchor rope prevents the shallow part grouting anchor rod from being stretched and broken, so that the coupling support of the shallow part crushing area and the deep part non-crushing area of the composite top plate is realized, the suspension effect of a support structure is optimized, and the large-span reduction is realized;
(2) The device is suitable for a composite top plate, and has good supporting effect when the whole device is broken in a shallow part area of the composite top plate through the deformation effect of the elastic hollow base plate in the flexible supporting device;
(3) The supporting capability is enhanced, the stabilizing effect is achieved, the depth coupling anchoring device is of a claw-shaped structure, the centering of a deep non-crushing area of the large-span composite top plate and the stabilizing supporting effect of a shallow crushing area of the large-span composite top plate are optimized, and shearing damage caused by instability of the prestressed anchor cable is avoided.
Drawings
FIG. 1 is a schematic view of a deep and shallow coupled steady core anchoring device for a large span composite roof;
FIG. 2 is a schematic plan view of a deep and shallow coupled steady core anchoring device for a large span composite roof;
FIG. 3 is a schematic elevation view of a deep and shallow coupled steady core anchoring device for a large span composite roof;
FIG. 4 is a schematic view of a deep anchor of the present utility model;
FIG. 5 is a schematic illustration of a grouting bolt according to the present utility model;
FIG. 6 is a schematic view of an elastic hollow mat according to the present utility model;
FIG. 7 is a schematic view of a steel strip according to the present utility model;
fig. 8 is a schematic view of a diamond mesh of the present utility model.
The reference numerals in the figures illustrate:
1. a deep anchor device; 1-1, a first pre-tightening nut; 1-2, anchor ring; 1-3, a gasket; 1-4, a tray; 1-5, an anchor cable body;
2. shallow portion reinforcement means; 2-1, grouting an anchor rod; 2-1a, a grouting plug; 2-1b, a second pretensioning nut; 2-1c, anchor backing plate; 2-1d, a slurry stop plug; 2-1e, a slurry outlet hole; 2-1f, anchoring barbs;
3. a flexible support device; 3-1, an elastic hollow base plate; 3-1a, anchor cable taper grooves; 3-1b, a conical groove of the anchor rod; 3-2, steel belt; 3-3, a diamond-shaped net;
4. and (3) a composite top plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model discloses a deep-shallow coupling stable anchoring device for a large-span composite top plate, which mainly comprises a deep anchoring device 1, a shallow reinforcing device 2, a flexible supporting device 3 and a composite top plate 4 in an application scene, wherein the deep anchoring device is shown in figures 1, 2 and 3;
the deep reinforcement device 1 comprises a first pre-tightening nut 1-1, an anchor ring 1-2, a gasket 1-3, a tray 1-4 and an anchor rope body 1-5; as shown in fig. 4;
the grouting anchor rod 2-1 comprises a 2-1a and a grouting plug; 2-1b, a second pretensioning nut; 2-1c, anchor backing plate; 2-1d, a slurry stop plug; 2-1e, a slurry outlet hole; 2-1f, anchoring barbs; as shown in fig. 5;
the flexible supporting device 3 comprises an elastic hollow base plate 3-1, a steel belt 3-2 and a diamond-shaped net 3-3; as shown in fig. 6, 7 and 8;
the elastic hollow base plate 3-1 comprises a 3-1a and an anchor rope conical groove; 3-1b, a conical groove of the anchor rod; as shown in fig. 6;
the specific implementation steps are as follows:
s1, placing a diamond-shaped net on the surface of a composite top plate crushing area to be maintained;
s2, placing the steel belt on a diamond net and fixing;
s3, selecting a deep anchoring device and a grouting anchor rod according to the field condition, and installing and fixing the deep anchoring device and the grouting anchor rod through a steel belt comprising an anchor cable conical groove and an anchor rod conical groove;
s4, installing an elastic hollow base plate to enable the anchor rope conical groove and the anchor rod conical groove to be respectively matched with the prestressed anchor rope and the grouting anchor rod;
s5, adjusting a first pre-tightening nut in the deep anchoring device, and normally using the stabilizing device.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (5)
1. The deep and shallow coupling stable core anchoring device for the large-span composite top plate is characterized by comprising a deep anchoring device (1), a shallow reinforcing device (2), a flexible supporting device (3) and a composite top plate (4), wherein the shallow reinforcing device (2) is positioned in a shallow crushing area, the deep anchoring device (1) penetrates through the crushing area and a separation layer area and is anchored in a non-crushing area, the flexible supporting device (3) combines the deep anchoring device (1) with the shallow reinforcing device (2) on the surface of the crushing area of the composite top plate (4) to form the deep and shallow coupling stable core anchoring device, and a plurality of deep and shallow coupling stable core anchoring devices are connected in a sliding mode through the flexible supporting device (3) to form the deep and shallow coupling stable core anchoring device for the large-span composite top plate; the deep anchoring device is a prestressed anchor cable and comprises a first pre-tightening nut (1-1), an anchor ring (1-2), a gasket (1-3), a tray (1-4) and an anchor cable body (1-5); the shallow portion reinforcing device (2) comprises three grouting anchor rods (2-1), wherein the deep portion anchor devices (1) are used as centers, and the grouting anchor rods are symmetrically distributed at 120 degrees.
2. Deep and shallow coupled steady anchoring device for large span composite roof according to claim 1, characterized in that the grouting anchor (2-1) comprises a plug (2-1 a), a second pretension nut (2-1 b), an anchor pad (2-1 c), a stop plug (2-1 d), a grout outlet (2-1 e), an anchoring barb (2-1 f), wherein the grout outlet (2-1 e) is used for grouting.
3. The deep and shallow coupling steady anchoring device for a large-span composite roof according to claim 1, wherein the deep and shallow coupling steady anchoring device comprises a deep anchoring device (1) and a shallow reinforcing device (2) which are connected on the surface of a crushing area of the composite roof (4) through a flexible supporting device (3) to form a claw-shaped structure.
4. The deep-shallow coupling steady-core anchoring device for the large-span composite top plate according to claim 2, wherein the flexible supporting device (3) comprises an elastic hollow base plate (3-1), a steel belt (3-2) and a diamond-shaped net (3-3), the elastic hollow base plate (3-1) is designed to be of a hollow structure, and the elastic hollow base plate (3-1) is designed with anchor cable conical grooves (3-1 a) and anchor rod conical grooves (3-1 b) which are large and small from top to bottom and are mutually matched with a tray (1-4) in the deep anchoring device (1) and a grout stop plug (2-1 d) in a grouting anchor rod (2-1) so that the deep anchoring device (1), the shallow reinforcing device (2) and the elastic hollow base plate (3-1) are tightly combined.
5. The deep and shallow coupling steady anchoring device for the large-span composite roof according to claim 4, wherein the steel belt (3-2) is provided with a plurality of anchor rope conical grooves (3-1 a) and anchor rod conical grooves (3-1 b), so that a plurality of deep and shallow coupling anchoring devices are firmly connected and act together to achieve the effect of reducing the span.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322188872.2U CN220748306U (en) | 2023-08-11 | 2023-08-11 | Deep-shallow coupling stable anchoring device for large-span composite top plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322188872.2U CN220748306U (en) | 2023-08-11 | 2023-08-11 | Deep-shallow coupling stable anchoring device for large-span composite top plate |
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| Publication Number | Publication Date |
|---|---|
| CN220748306U true CN220748306U (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322188872.2U Active CN220748306U (en) | 2023-08-11 | 2023-08-11 | Deep-shallow coupling stable anchoring device for large-span composite top plate |
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| Country | Link |
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| CN (1) | CN220748306U (en) |
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- 2023-08-11 CN CN202322188872.2U patent/CN220748306U/en active Active
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