CN221346993U - Novel core-adjusting grouting anchor grouting system for mine - Google Patents

Novel core-adjusting grouting anchor grouting system for mine Download PDF

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CN221346993U
CN221346993U CN202322709577.7U CN202322709577U CN221346993U CN 221346993 U CN221346993 U CN 221346993U CN 202322709577 U CN202322709577 U CN 202322709577U CN 221346993 U CN221346993 U CN 221346993U
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grouting
slurry
anchor
seat
aligning
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CN202322709577.7U
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陈清
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Anhui Luyuan Environmental Protection Technology Co ltd
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Anhui Luyuan Environmental Protection Technology Co ltd
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Abstract

The utility model provides a novel core-adjusting grouting anchor injection system for mines, which comprises the following components: the core adjusting grouting seat is provided with a hollow inner cavity, and the inner diameter of the hollow inner cavity of the core adjusting grouting seat is larger than the outer diameter of the rod body of the anchor rod or the anchor cable; the sealing ring is arranged between the aligning grouting seat and the rod body, and is blocked at the end part of the hollow inner cavity; the grouting pipe is arranged on the side surface of the aligning grouting seat and is communicated with the hollow inner cavity of the aligning grouting seat; the check valve is arranged in the grouting pipe and is used for enabling the slurry to be conveyed from the grouting pipe to the hollow inner cavity of the aligning grouting seat in one way; the slurry guide pipe is connected to one end of the aligning grouting seat, which is far away from the sealing ring, and extends into the drilling hole; the slurry stopping assembly is sleeved on the periphery of the slurry guiding pipe, and expands when being subjected to pressure so as to seal gaps between the slurry guiding pipe and the drilled holes. The anchor grouting system has better grouting effect.

Description

Novel core-adjusting grouting anchor grouting system for mine
Technical Field
The utility model belongs to the technical field of anchor rod or anchor cable grouting, and particularly relates to a novel core-adjusting grouting anchor grouting system for mines.
Background
Along with the increasing depth and the increasing scale of mining, the roadway pressure also follows the increasing scale, and the strength and the stability of surrounding rocks of a mined roadway, a weak rock stratum, a broken belt and the like are poor, so that the roadway control, the roadway support and the roadway maintenance are greatly trapped. Thus, the effect of supporting by using the anchor rods or the anchor cables is quite unsatisfactory.
At present, a grouting support mode is mainly adopted, and at present, grouting support is mainly adopted by adopting an air core anchor rod support, the air core anchor rod needs to be perforated again in grouting, the pipe wall of the air core anchor rod is thinner, the pipe wall is easy to puncture, the bearing capacity of the pipe wall is very low after perforation, the requirements of the broken tunnel and the tunnel support with high pressure cannot be met, and the preset support effect cannot be achieved.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of utility model
The utility model aims to provide a novel core-adjusting grouting anchoring and grouting system for mines, which at least solves the problems in the prior art.
In order to achieve the above object, the present utility model provides the following technical solutions:
a novel core-adjusting grouting anchor injection system for mines, the anchor injection system comprising:
The core adjusting grouting seat is provided with a hollow inner cavity, and the inner diameter of the hollow inner cavity of the core adjusting grouting seat is larger than the outer diameter of the rod body of the anchor rod or the anchor cable;
The sealing ring is arranged between the aligning grouting seat and the rod body, and the sealing ring is blocked at the end part of the hollow inner cavity;
the grouting pipe is arranged on the side surface of the aligning grouting seat and is communicated with the hollow inner cavity of the aligning grouting seat;
The check valve is arranged in the grouting pipe and is used for enabling the slurry to be conveyed from the grouting pipe to the hollow inner cavity of the aligning grouting seat in a one-way mode;
The slurry guide pipe is connected to one end of the aligning grouting seat, which is far away from the sealing ring, and extends into the drilling hole;
The slurry stopping assembly is sleeved on the periphery of the slurry guiding pipe, and expands when being subjected to pressure so as to seal gaps between the slurry guiding pipe and the drilled hole.
The mining novel core-adjusting grouting anchor grouting system comprises a plurality of grouting stopping rings, wherein annular steel gaskets are arranged at two ends of any grouting stopping ring; the slurry stopping rings and the annular steel gaskets are sleeved on the slurry guide pipe.
The mining novel core-adjusting grouting anchor grouting system is characterized in that the grouting stop ring is internally provided with at least one hollow cavity;
when the slurry stopping ring is provided with a hollow cavity, the hollow cavity is positioned in the middle of the slurry stopping ring;
When the slurry stopping ring is provided with a plurality of hollow cavities, the hollow cavities are uniformly distributed in the slurry stopping ring along the axial direction.
The novel core-adjusting grouting anchor grouting system for the mine is characterized in that a limiting piece is preferably arranged on the slurry guide pipe and located at the upstream of the slurry stopping assembly, and the limiting piece is used for limiting the axial displacement movement of the slurry stopping assembly.
The mining novel core-adjusting grouting anchor grouting system comprises a grouting assembly, wherein the grouting assembly comprises a grouting assembly, a grouting assembly and a grouting assembly;
the diameter of the sealing slurry stop plug gradually decreases from upstream to downstream.
The mining novel core-adjusting grouting anchor grouting system is characterized in that a plurality of flow dividing sheets are preferably arranged on the slurry guide pipe, and the flow dividing sheets are positioned at the downstream of the slurry stopping assembly;
The splitter blade is gradually inclined towards the central axis of the slurry guide pipe so as to form a splitter port on the slurry guide pipe.
According to the novel core-adjusting grouting anchor grouting system for the mine, preferably, the splitter plates are provided with multiple layers in the axial direction of the grouting pipe, and two adjacent layers of splitter plates are arranged in a staggered mode in the axial direction.
According to the novel core-adjusting grouting anchor grouting system for the mine, preferably, at least one inner spring piece is axially arranged on the inner wall of the grouting pipe, and each layer of inner spring pieces are uniformly arranged along the central axis of the grouting pipe.
According to the novel core-adjusting grouting anchor grouting system for the mine, preferably, at least one layer of outer spring piece is axially arranged on the outer wall of the grouting pipe, and each layer of outer spring piece is uniformly arranged along the central axis of the grouting pipe.
The mining novel core-adjusting grouting anchor grouting system comprises a grouting pipe, wherein the grouting pipe is connected with the grouting pipe through a pipeline, and the grouting pipe is connected with the grouting pipe through a pipeline;
The one end that the aligning slip casting seat kept away from the sealing washer is the hemisphere face, the tray is provided with the hemisphere groove towards the one side of aligning slip casting seat, through the hemisphere face of aligning slip casting seat and the hemisphere groove cooperation adjustment of tray to make aligning slip casting seat axis perpendicular to tray place plane.
The beneficial effects are that:
The check valve is arranged on the grouting pipe to prevent the slurry from flowing backwards after grouting; the check valve is matched with the flow dividing sheet, so that a better check sealing effect is achieved. Meanwhile, a slurry stopping component is sleeved on the periphery of the slurry guide pipe, when slurry is injected to a certain pressure, the slurry can extrude the slurry stopping component, a plurality of slurry stopping rings are arranged, and the slurry stopping rings can expand radially, so that a better sealing effect is achieved, the slurry stopping component expands radially, the greater the slurry pressure is, the better the slurry stopping component expands, and the better the sealing effect is achieved; and the grouting stopping component is matched with the check valve, so that the anchor grouting system has a certain pressure maintaining effect, and the anchor grouting system is ensured to have a better grouting effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic diagram of an anchoring system according to one embodiment of the present utility model;
FIG. 2 is a schematic diagram of an anchoring system according to another embodiment of the present utility model;
FIG. 3 is a partial schematic view of a diverter blade on a slurry guide tube according to one embodiment of the present utility model.
In the figure: 1. a rod body; 2. a seal ring; 3. a quick connector; 4. a check valve; 5. a core-adjusting grouting seat; 6. a slurry guide tube; 7. a limit step; 8. a slurry stopping ring; 81. a hollow cavity; 9. an annular steel gasket; 10. a grout stop plug; 11. a diverter blade; 12. an inner spring piece; 13. an outer spring piece; 14. and a tray.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.
In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
According to a specific embodiment of the utility model, as shown in fig. 1-3, the utility model provides a novel core-adjusting grouting anchoring system for mines, which comprises:
The core adjusting grouting seat is provided with a hollow inner cavity, and the inner diameter of the hollow inner cavity of the core adjusting grouting seat is larger than the outer diameter of the rod body 1 of the anchor rod or the anchor cable.
The sealing ring 2 is arranged between the aligning grouting seat 5 and the rod body 1, and the sealing ring 2 is blocked at the end part of the hollow inner cavity.
The grouting pipe is arranged on the side face of the aligning grouting seat 5 and is communicated with the hollow inner cavity of the aligning grouting seat 5.
A check valve 4, the check valve 4 is arranged in the grouting pipe for unidirectional slurry delivery from the grouting pipe to the hollow cavity of the aligning grouting seat 5.
The slurry guide pipe 6 is connected to one end of the aligning grouting seat 5 far away from the sealing ring 2, and the slurry guide pipe 6 extends into a drilled hole.
The slurry stopping component is sleeved on the periphery of the slurry guiding pipe 6 and expands when being subjected to pressure so as to seal a gap between the slurry guiding pipe 6 and a drilled hole.
In the anchor grouting system, the check valve 4 is arranged on the grouting pipe, so that the slurry can only enter the anchor grouting system from the grouting pipe, and the slurry cannot overflow from the grouting pipe, thereby preventing the slurry from flowing backwards after grouting; meanwhile, a slurry stopping component is sleeved on the periphery of the slurry guide pipe 6, when slurry is injected to a certain pressure, the slurry can squeeze the slurry stopping component, the slurry stopping component can expand in the radial direction, and the larger the slurry pressure is, the better the slurry stopping component expansion effect is, so that the slurry stopping component has a better plugging effect; and the grout stopping component is matched with the check valve 4, so that the grouting system has a certain pressure maintaining effect, and a better grouting effect of the grouting system is ensured.
The slurry stopping assembly comprises a plurality of slurry stopping rings 8, and annular steel gaskets 9 are arranged at two ends of any one slurry stopping ring 8; the slurry stopping ring 8 and the annular steel gasket 9 are sleeved on the slurry guide pipe 6.
In one embodiment of the application, a plurality of slurry stopping rings 8 are arranged, and the slurry stopping rings 8 can expand radially, so that a better plugging and sealing effect is achieved; and all set up annular steel gasket 9 at the end of only thick liquid circle 8, just also make to set up annular steel gasket 9 between two arbitrary adjacent only thick liquid circles 8, wherein, annular steel gasket 9 plays the effect of voltage-sharing bearing for pressure can be better transfer between adjacent only thick liquid circle 8, thereby guarantee that every only thick liquid circle 8 all has better inflation sealed effect.
The inner wall of one end of the hollow inner cavity of the aligning grouting seat 5 far away from the sealing plug is provided with an inner thread, and the periphery of the end part of the guide pipe 6 close to the aligning grouting seat 5 is provided with an outer thread, so that the outer thread of the guide pipe 6 is in threaded connection with the inner thread of the aligning grouting seat 5.
In one embodiment of the application, the slurry guide pipe 6 is in threaded connection with the aligning grouting seat 5, so that the manufacturing and the installation of an anchor grouting system can be facilitated; in other embodiments, the slurry guide tube 6 and the aligning grouting seat 5 may be connected by welding, cold press or bonding.
The slurry stop ring 8 is internally provided with at least one hollow cavity 81; when the slurry stop ring 8 is provided with a hollow cavity 81, the hollow cavity 81 is positioned in the middle of the slurry stop ring 8; when the slurry stop ring 8 is provided with a plurality of hollow cavities 81, the hollow cavities 81 are uniformly distributed in the slurry stop ring 8 along the axial direction.
In one embodiment of the application, as shown in FIG. 1, a grout stop ring 8 has a hollow cavity 81 therein; in other embodiments, as shown in FIG. 2, one grout stop ring 8 has three hollow cavities 81 therein; three hollow cavity 81 are along the axial equipartition at the inside of stopping the thick liquid circle 8, set up a plurality of hollow cavity 81 for stopping thick liquid circle 8 divide into a plurality of radial deformation cells that can take place along the axial, thereby make stopping thick liquid circle 8 can more even deformation.
A limiting piece is arranged on the slurry guide pipe 6 and positioned at the upstream of the slurry stopping assembly, and the limiting piece is used for limiting the displacement movement of the slurry stopping assembly along the axial direction.
In one embodiment of the application, the limiting piece is a limiting step 7 arranged on the circumference of the slurry guide pipe 6, and the slurry stopping component and the limiting step 7 are mutually blocked, so that the slurry stopping component cannot move along the slurry guide pipe 6 in the upstream direction, and the slurry stopping component has a solid bearing foundation, thereby ensuring that the slurry stopping component can better radially deform under the action of slurry pressure.
The grout stop assembly further comprises a seal grout stop plug 10, wherein the seal grout stop plug 10 is positioned at the most downstream position of the grout stop assembly; the diameter of the sealing stopper 10 gradually decreases from upstream to downstream.
In one embodiment of the present application, the provision of a tapered seal stopper 10 downstream of the grout stop assembly can facilitate installation of the entire anchoring system into a borehole.
A plurality of flow dividing sheets 11 are also arranged on the slurry guide pipe 6, and the flow dividing sheets 11 are positioned at the downstream of the slurry stopping assembly; the splitter 11 is gradually inclined toward the central axis of the pulp guide 6 so that a split-flow port is formed in the pulp guide 6.
In one embodiment of the application, the splitter vane 11 is spaced from the shaft 1 that penetrates the anchoring system, thereby avoiding interference between the splitter vane 11 and the shaft 1. When grouting, when the slurry flows from the upstream to the downstream of the slurry guide pipe 6, the slurry bypasses the splitter blades 11 and flows downwards, and at the moment, the slurry can also flow out of the slurry guide pipe 6 from the inside of the slurry guide pipe 6 through the splitter ports, so that the slurry outlet holes are convenient for discharging slurry in the radial direction of the slurry guide pipe 6 and are matched with the slurry outlet of the slurry guide pipe 6 along the axial direction, and the anchor grouting system has better slurry outlet effect.
When the slurry flows reversely, the slurry flows from the downstream of the slurry guide pipe 6 to the upstream of the slurry guide pipe 6, when the slurry is left to the flow dividing sheet 11, the flow dividing sheet 11 inclines towards the central axis direction of the guide pipe, so that most of the slurry is left to the periphery of the slurry guide pipe 6 from the position of the flow dividing opening, a slurry stopping assembly is arranged on the periphery of the slurry guide pipe 6, and when the slurry stopping assembly is under the action of the slurry pressure, the slurry stopping ring 8 in the slurry stopping assembly has better expansion sealing effect, so that the anchor injection system has better sealing effect; and the check valve 4 is arranged at the end of the grouting pipe, and the check valve 4 is matched with the flow dividing sheet 11, so that a better check sealing effect is achieved.
The splitter blades 11 are provided with a plurality of layers in the axial direction of the slurry guide pipe 6, and the adjacent two layers of splitter blades 11 are arranged in a staggered manner in the axial direction. In one embodiment of the present application, as shown in fig. 3, the splitter 11 is provided with three layers on the slurry guiding tube 6, each layer of multiple splitter 11 is uniformly distributed on the slurry guiding tube 6, and two adjacent layers of splitter 11 are arranged in a staggered manner in the axial direction of the slurry guiding tube 6, so that the splitter 11 has a better splitting effect, and can better play a role in preventing slurry from flowing back.
At least one inner spring piece 12 is axially arranged on the inner wall of the slurry guide tube 6, and a plurality of inner spring pieces 12 in each layer are uniformly arranged along the central axis of the slurry guide tube 6.
In one embodiment of the present application, at least one inner spring piece 12, such as one layer, two layers, three layers, etc., is arranged on the inner wall of the slurry guiding tube 6, and the specific arrangement number can be selected according to the length of the slurry guiding tube 6; each layer is provided with a plurality of spring pieces which are uniformly arranged around the central axis of the slurry guide pipe 6, so that the rod body 1 can be conveniently centered in the slurry guide pipe 6, the anchoring and grouting system can adapt to rod bodies 1 with different diameters, and after the rod bodies 1 with different diameters are inserted into the anchoring and grouting system, better centering can be applied, and grouting operation is facilitated; in this embodiment, the spring piece is arc-shaped, so that the spring piece does not affect the axial position adjustment of the rod body 1 in the anchoring system.
In this embodiment, holes are punched in the wall of the slurry guide pipe 6, and the spring pieces are fixed through the holes in the wall. In other embodiments, the spring plate may be bonded to the inner wall of the grouting pipe.
At least one layer of outer spring piece 13 is axially arranged on the outer wall of the slurry guide tube 6, and each layer of outer spring piece 13 is uniformly arranged along the central axis of the slurry guide tube 6.
In one embodiment of the application, at least one layer of outer spring piece 13, such as one layer, two layers, three layers and the like, is arranged on the outer wall of the slurry guide tube 6, and the specific arrangement quantity can be selected according to the length of the slurry guide tube 6; each layer is provided with a plurality of spring pieces which are uniformly arranged around the central axis of the slurry guide pipe 6; thereby being convenient for centering the slurry guide pipe 6 in the drill hole, further ensuring that the stress of the slurry stop plug 10 is more uniform, and ensuring that the slurry stop plug 10 better plays a role in sealing the gap between the slurry guide pipe 6 and the drill hole.
The anchoring and grouting system also comprises a tray 14, and the tray 14 is sleeved on the periphery of the slurry guide pipe 6; one end of the aligning grouting seat 5 far away from the sealing ring 2 is a hemispherical surface, one surface of the tray 14 facing the aligning grouting seat 5 is provided with a hemispherical groove, and the hemispherical surface of the aligning grouting seat 5 is matched and adjusted with the hemispherical groove of the tray 14 so that the axis of the aligning grouting seat 5 is perpendicular to the plane where the tray is located.
In one embodiment of the application, the aligning grouting seat 5 is matched with the tray for aligning, so that the axis of the aligning grouting seat 5 is perpendicular to the plane of the tray, and simultaneously, the aligning pieces arranged inside and outside the grouting guide pipe 6 are matched, thereby the rod body 1 of the anchor rod or the anchor cable is perpendicular to the plane of the tray, and the anchor rod or the anchor cable can better play a supporting role.
A quick connector 3 is arranged at the end part of the grouting pipe. The quick connector 3 is arranged, so that the grouting pipe can be conveniently and quickly connected with the connector of the anchor grouting system, and grouting efficiency is improved.
It is to be understood that the above description is intended to be illustrative, and that the embodiments of the present application are not limited thereto.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. Novel core-adjusting grouting anchor injection system for mines is characterized in that the anchor injection system comprises:
The core adjusting grouting seat is provided with a hollow inner cavity, and the inner diameter of the hollow inner cavity of the core adjusting grouting seat is larger than the outer diameter of the rod body of the anchor rod or the anchor cable;
The sealing ring is arranged between the aligning grouting seat and the rod body, and the sealing ring is blocked at the end part of the hollow inner cavity;
the grouting pipe is arranged on the side surface of the aligning grouting seat and is communicated with the hollow inner cavity of the aligning grouting seat;
The check valve is arranged in the grouting pipe and is used for enabling the slurry to be conveyed from the grouting pipe to the hollow inner cavity of the aligning grouting seat in a one-way mode;
The slurry guide pipe is connected to one end of the aligning grouting seat, which is far away from the sealing ring, and extends into the drilling hole;
The slurry stopping assembly is sleeved on the periphery of the slurry guiding pipe, and expands when being subjected to pressure so as to seal gaps between the slurry guiding pipe and the drilled hole.
2. The mining novel core-adjusting grouting anchor grouting system according to claim 1, wherein the grouting stopping assembly comprises a plurality of grouting stopping rings, and annular steel gaskets are arranged at two ends of any grouting stopping ring; the slurry stopping rings and the annular steel gaskets are sleeved on the slurry guide pipe.
3. The mining novel core-adjusting grouting anchor grouting system according to claim 2, wherein the inside of the grout stop ring is provided with at least one hollow cavity;
when the slurry stopping ring is provided with a hollow cavity, the hollow cavity is positioned in the middle of the slurry stopping ring;
When the slurry stopping ring is provided with a plurality of hollow cavities, the hollow cavities are uniformly distributed in the slurry stopping ring along the axial direction.
4. The mining novel core-adjusting grouting anchor grouting system according to claim 2, wherein a limiting piece is arranged on the slurry guide pipe and located at the upstream of the slurry stopping assembly, and the limiting piece is used for limiting the axial displacement movement of the slurry stopping assembly.
5. The mining novel core-adjusting grouting anchor grouting system according to claim 4, wherein the grouting stopping assembly further comprises a sealing grouting stopping plug, and the sealing grouting stopping plug is positioned at the most downstream position of the grouting stopping assembly;
the diameter of the sealing slurry stop plug gradually decreases from upstream to downstream.
6. The mining novel core-adjusting grouting anchor grouting system according to claim 2, wherein a plurality of flow dividing sheets are further arranged on the slurry guide pipe, and the flow dividing sheets are positioned at the downstream of the slurry stopping assembly;
The splitter blade is gradually inclined towards the central axis of the slurry guide pipe so as to form a splitter port on the slurry guide pipe.
7. The mining novel core-adjusting grouting anchor grouting system according to claim 6, wherein the splitter plates are provided with a plurality of layers in the axial direction of the grouting pipe, and two adjacent layers of splitter plates are arranged in a staggered manner in the axial direction.
8. The mining novel core-adjusting grouting anchor grouting system according to any one of claims 1 to 7, wherein at least one inner spring piece is axially arranged on the inner wall of the slurry guide pipe, and each layer of the plurality of inner spring pieces is uniformly arranged along the central axis of the slurry guide pipe.
9. The mining novel core-adjusting grouting anchor grouting system according to claim 8, wherein at least one layer of outer spring pieces is axially arranged on the outer wall of the slurry guide pipe, and each layer of outer spring pieces is uniformly arranged along the central axis of the slurry guide pipe.
10. The mining novel core-adjusting grouting anchor grouting system according to any one of claims 1 to 7, wherein the anchor grouting system further comprises a tray, and the tray is sleeved on the periphery of the grouting guide pipe;
The one end that the aligning slip casting seat kept away from the sealing washer is the hemisphere face, the tray is provided with the hemisphere groove towards the one side of aligning slip casting seat, through the hemisphere face of aligning slip casting seat and the hemisphere groove cooperation adjustment of tray to make aligning slip casting seat axis perpendicular to tray place plane.
CN202322709577.7U 2023-10-10 2023-10-10 Novel core-adjusting grouting anchor grouting system for mine Active CN221346993U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322709577.7U CN221346993U (en) 2023-10-10 2023-10-10 Novel core-adjusting grouting anchor grouting system for mine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322709577.7U CN221346993U (en) 2023-10-10 2023-10-10 Novel core-adjusting grouting anchor grouting system for mine

Publications (1)

Publication Number Publication Date
CN221346993U true CN221346993U (en) 2024-07-16

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ID=91827259

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322709577.7U Active CN221346993U (en) 2023-10-10 2023-10-10 Novel core-adjusting grouting anchor grouting system for mine

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