Mining anchoring grouting structure and supporting plate thereof

Abstract

The utility model relates to a mining anchoring and grouting structure and a supporting plate thereof, the mining anchoring and grouting structure comprises the supporting plate and an anchor rod, the supporting plate comprises a plate body used for covering a surrounding rock at the opening edge of a mounting hole, the center position of the plate body is provided with a downward-sunken arched part, the arched part is provided with a through hole which extends up and down and is used for the anchor rod to penetrate through, and the anchor rod is arranged in the through hole. A grouting through hole extending up and down is formed in the position, beside the through hole, of the arching part, a grouting pipe is fixedly connected into the grouting through hole, and the upper end of the grouting pipe penetrates through the grouting pipe and can extend into the mounting hole together with the anchor rod. And integrated installation of the anchoring and grouting structure is achieved. The structure is compact, installation is convenient, and the anchoring grouting procedure is effectively omitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the mine roadway support field especially relates to a mine anchoring grouting structure and its supporting plate. BACKGROUND

[0002] With the increasing coal mining depth, the roadway terrain is more and more complex, and the surrounding rock is broken seriously, so the ordinary anchor rod support cannot meet the requirements. The principle of anchor reinforcement is to inject grout into the hole through the grouting anchor cable, and the grout penetrates into the surrounding rock, which plays a role of adhesion and solidification, and improves the supporting effect. The existing grouting tool has a grouting anchor rod and a grouting anchor cable, and the grouting can be realized by external grouting and hollow rod grouting.

[0003] The existing anchor structure is shown in Figure 1 It comprises an anchor rod 1, a supporting plate 2 sleeved outside the anchor rod 1, and a spherical washer sleeved outside the anchor rod 1, and one end of the anchor rod 1 is fixed with a nut 3. In actual construction, an installation hole is chiseled on the surrounding rock, the anchor rod is solid, the anchor agent is added into the installation hole, the anchor rod is rotated into the installation hole, and the upper end of the anchor is fixed after a certain time. In order to meet the supporting requirements, the supporting plate will be tightly attached to the outer edge of the installation hole, so as to ensure the stability of the anchoring; when the external grouting of the rod is carried out, a slanting grouting hole is drilled on the side of the installation hole, which is communicated with the installation hole, and the grouting operation is carried out through the grouting hole. The lower end of the grouting pipe is connected to the grouting equipment, and the upper end is inserted into the slanting hole, and the grout enters the annular space between the installation hole and the anchor rod from the slanting hole, so that the grouting reinforcement of the surrounding rock fissure can be carried out.

[0004] However, the external grouting method has the following problems in actual use: (1) the operation is complicated, other tools are needed to drill a slanting grouting hole, the processing procedures are more, the operation process in the roadway is increased, and the supporting efficiency is affected. (2) The additional grouting hole needs to be pulled out after the grouting is completed, at this time the grout is easy to flow back from the grouting hole, which affects the grouting effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a mine anchoring grouting structure to solve the problem of slow grouting efficiency, low supporting efficiency and affecting grouting effect caused by additional grouting hole in the prior art, and also aims at providing a supporting plate of the mine anchoring grouting structure.

[0006] In order to solve the above problems, the supporting plate of the mine anchoring grouting structure adopts the following technical scheme:

[0007] A support plate for a mining anchoring grouting structure includes a plate body for covering the surrounding rock at the edge of the installation hole. The plate body has a downwardly recessed arched part at its center. The arched part has vertically extending through holes for anchor rods to pass through. A vertically extending grouting through hole is opened on the arched part next to the through hole. A grouting pipe is fixedly connected to the grouting through hole. The upper end of the grouting pipe passes through the grouting through hole and can extend into the installation hole together with the anchor rod.

[0008] In a preferred embodiment, the grouting pipe has an insertion section for insertion into an installation hole and a connecting section for connecting to grouting equipment. Both the insertion section and the connecting section are parallel to the extension direction of the perforation. The distance between the insertion section and the central axis of the perforation is less than the distance between the connecting section and the central axis of the perforation. An arc-shaped transition section is provided between the insertion section and the connecting section.

[0009] In a preferred embodiment, there are two or more grouting pipes, which are arranged circumferentially around the perforation.

[0010] In a preferred embodiment, the arched portion is further provided with an exhaust hole for venting air that is resisting grouting.

[0011] In a preferred embodiment, the diameter of the vent hole is smaller than the diameter of the grouting perforation hole.

[0012] In a preferred embodiment, the grouting pipe is connected to the arched portion by a spot welding structure or a threaded structure.

[0013] The mining anchoring grouting structure involved in this utility model adopts the following technical solution:

[0014] A mining anchoring grouting structure includes a support plate and an anchor rod. The support plate includes a plate body for covering the surrounding rock at the edge of the installation hole. A downwardly recessed arched part is provided at the center of the plate body. The arched part has vertically extending through holes for the anchor rod to pass through. A vertically extending grouting through hole is provided on the arched part next to the through hole. A grouting pipe is fixedly connected to the grouting through hole. The upper end of the grouting pipe passes through the grouting pipe and can extend into the installation hole together with the anchor rod.

[0015] In a preferred embodiment, the grouting pipe has an insertion section for insertion into an installation hole and a connecting section for connecting to grouting equipment. Both the insertion section and the connecting section are parallel to the extension direction of the perforation. The distance between the insertion section and the central axis of the perforation is less than the distance between the connecting section and the central axis of the perforation. An arc-shaped transition section is provided between the insertion section and the connecting section.

[0016] In a preferred embodiment, there are two or more grouting pipes, which are arranged circumferentially around the perforation.

[0017] In a preferred embodiment, the arched portion is further provided with an exhaust hole for venting air that is resisting grouting.

[0018] In a preferred embodiment, the diameter of the vent hole is smaller than the diameter of the grouting perforation hole.

[0019] In a preferred embodiment, the grouting pipe is connected to the arched portion by a spot welding structure or a threaded structure.

[0020] In a preferred embodiment, a positioning structure is further included for connection to the anchor bolt and for fixed connection to the grouting pipe.

[0021] In a preferred embodiment, the positioning structure includes a fixing ring, which has a grouting fixing hole for the grouting pipe to pass through and an anchor fixing hole for the anchor rod to pass through. The grouting fixing hole is parallel to the axis of the anchor fixing hole.

[0022] As described above, this utility model has the following beneficial effects: Compared with the prior art, the mining anchoring grouting structure involved in this utility model, during construction, involves chiseling installation holes in the surrounding rock, adding anchoring agent into the installation holes, fixing the upper end of the anchor rod after a certain period of time, and then locking the support plate onto the outer edge of the installation hole. The support plate can be fixed to the surrounding rock, and the lower end of the grouting pipe is connected to the grouting equipment through a pipeline, thus grouting and reinforcing the cracks in the surrounding rock. This eliminates the need for on-site assembly of the grouting device, reducing procedures and improving work efficiency. Furthermore, by adopting this integrated anchoring grouting structure with the grouting pipe and anchor rod, in actual use, the support plate and anchor rod can be fixed to the surrounding rock surface together with a single anchoring operation, simultaneously completing the installation of the grouting pipe and achieving integrated installation of the anchoring grouting structure. The structure is compact, easy to install, and effectively saves on anchoring grouting procedures. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below:

[0024] Figure 1 This is a schematic diagram of the structure of an anchor in the prior art;

[0025] Figure 2 This is a schematic diagram of a specific embodiment of the mining anchoring grouting structure of this utility model;

[0026] Figure 3 for Figure 2 A half-section view;

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the tray in the middle;

[0028] Figure 5 for Figure 4 A half-section view;

[0029] Figure 6 for Figure 5 A schematic diagram of the fixed ring structure.

[0030] Explanation of reference numerals in the attached drawings: 1-Anchor bolt; 2-Support plate; 21-Plate body; 22-Arched section; 23-Perforation; 24-Grouting perforation; 25-Vent hole; 3-Nut; 4-Grouting pipe; 41-Connecting section; 42-Insertion section; 43-Arc-shaped transition section; 5-Fixing ring; 51-Anchor bolt fixing hole; 52-Grouting fixing hole. Detailed Implementation

[0031] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown herein can generally be arranged and designed in various different configurations.

[0032] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Specific embodiments of the mining anchoring grouting structure involved in this utility model are as follows: Figures 2 to 6As shown, the mining anchoring grouting structure includes a support plate 2 and an anchor rod 1, wherein one end of the anchor rod 1 has a nut 3. Its structure and working principle are consistent with the structure of the anchor rod 1 in the prior art, and will not be described in detail.

[0035] This mining anchoring and grouting structure is used to achieve simultaneous installation of anchoring and grouting during the support process of surrounding rock in mine roadways. It effectively saves construction steps and improves the efficiency of anchoring and grouting operations.

[0036] Specifically, the aforementioned support plate 2 includes a plate body 21 for covering the surrounding rock at the edge of the installation hole. In this embodiment, the plate body 21 is generally a rectangular plate structure, and its external dimensions are consistent with the structure of the support plate 2 for anchor rod 1 in the prior art. It is used to cover the anchor installation hole in the surrounding rock during the anchoring process and is pressed and fixed to the surrounding rock by the anchor rod 1, providing a certain support for the surrounding rock and enhancing its stability and safety. The mining anchoring grouting structure in this embodiment is applied to the side wall surrounding rock of the mine roadway. In actual use, its support plate 2 is installed upward or inclined upward. The side plate surface of the plate body 21 closest to the surrounding rock is defined as the upper plate surface, and the other side plate surface is defined as the lower plate surface. Consistent with the prior art, the plate body 21 has a downwardly recessed arched part 22 at its center. The arched part 22 is generally an arc-shaped cover structure, and the arched part 22 has vertically extending through holes 23 for the anchor rod 1 to pass through. The arched portion 22 is a circumferentially extending structure symmetrical about its own central axis, and the perforation 23 is arranged at the center of the arched portion 22. The anchor rod 1 extends upward from bottom to top through the support plate 2 to be inserted into the installation hole in the surrounding rock.

[0037] In order to achieve the functions of anchoring and grouting in one piece, a grouting perforation 24 extending vertically is provided on the arched part 22 next to the perforation 23. A grouting pipe 4 is fixedly connected in the grouting perforation 24. The upper end of the grouting pipe 4 passes through the grouting perforation 24 and can extend into the installation hole together with the anchor rod 1.

[0038] In one preferred embodiment, the grouting pipe 4 is connected by spot welding or threaded connection. Of course, in other embodiments, it can also be connected by pressure assembly or snap-fit ​​connection. There is no specific limitation. The spot welding connection has the following advantages in actual use: the air resistance in the mounting hole can be discharged outward through the gap between the grouting pipe 4 and the arched part 22.

[0039] By using grouting perforations 24 on the support plate 2 to integrally fix the grouting pipe 4 to the support plate 2, the anchoring support and grouting operations can be integrated. During subsequent grouting, the lower end of the grouting pipe 4 can be directly connected to the grouting equipment via a pipe, eliminating the need for manual lifting of the grouting pipe 4 for grouting. This simple structure saves significant manpower.

[0040] In one preferred embodiment, to ensure smooth grout flow during grouting, the grouting pipe 4 has an insertion section 42 for insertion into the installation hole and a connecting section 41 for connecting the grouting equipment. Both the insertion section 42 and the connecting section 41 are parallel to the extension direction of the perforation 23. The distance between the insertion section 42 and the central axis of the perforation 23 is less than the distance between the connecting section 41 and the central axis of the perforation 23. An arc-shaped transition section 43 is provided between the insertion section 42 and the connecting section 41. The external grout enters the arc-shaped transition section 43 through the connecting section 41, and then is injected into the circumferential space between the installation hole and the anchor rod 1 through the connecting section 41. To ensure that the grouting pipe 4 can smoothly extend into the installation hole, the diameter of the installation hole can be enlarged during drilling to ensure that the size of its circumferential space meets the insertion requirements of the upper end of the grouting pipe 4.

[0041] In one preferred embodiment, there are two grouting pipes 4, which are spaced apart circumferentially around the perforation 23. In other embodiments, to ensure the grouting effect, one or more can be provided, depending on the actual grouting effect on site; those skilled in the art can design arbitrarily. Of course, there are also two grouting perforations 24 corresponding to the grouting pipes 4, with each grouting pipe 4 corresponding to each grouting perforation 24.

[0042] To facilitate rapid air release within the installation hole during grouting and prevent internal pressure buildup that could impede grout flow, the aforementioned arched portion 22 is equipped with an vent 25 for venting air that would otherwise obstruct grout flow. The diameter of the vent 25 is smaller than that of the grouting perforation 24. However, since the anchor bolt 1 and the perforation 23 already have a gap, which is sufficient for venting under most conditions, the vent 25 can be opened or closed depending on the grouting conditions during actual use.

[0043] In one preferred embodiment, the aforementioned anchoring grouting structure further includes a positioning structure for connecting to the anchor rod 1 and fixing it to the grouting pipe 4. This positioning structure includes a fixing ring 5, which has a grouting fixing hole 52 for the grouting pipe 4 to pass through and an anchor rod fixing hole 51 for the anchor rod 1 to pass through. The grouting fixing hole 52 is parallel to the axis of the anchor rod fixing hole 51. The grouting pipe 4 and the anchor rod 1 can be fixed together using a single fixing ring 5, facilitating subsequent rapid construction and installation. Simultaneously, the external dimensions of the fixing ring 5 are substantially consistent with the dimensions of the mounting hole. After the support plate 2 is fixed, the fixing ring 5 can be engaged within the mounting hole, and it also provides some resistance to the backflow of grout within the mounting hole.

[0044] When in use, drilling installation holes in the surrounding rock and adding anchoring agent into the installation holes, fixing the upper end of the anchor rod 1 after a certain period of time, and then locking the support plate 2 on the outer edge of the installation hole. The support plate 2 can be fixed on the surrounding rock. The lower end of the grouting pipe 4 is connected to the grouting equipment through a pipeline, so that the cracks in the surrounding rock can be grouted and reinforced.

[0045] The structure of the pallet 2 embodiment involved in this utility model is the same as that of the pallet 2 in the above-mentioned embodiment of the mining anchor grouting structure, and will not be described in detail.

[0046] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of this utility model. Any equivalent substitutions and modifications or partial substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A support plate for a mining anchoring grouting structure, comprising a plate body for covering the surrounding rock at the edge of an installation hole, wherein the plate body has a downwardly recessed arched portion at its center, and the arched portion has vertically extending through holes for anchor rods to pass through, characterized in that, The arched portion has vertically extending grouting perforations located beside the perforation. A grouting pipe is fixedly connected to the grouting perforation. The upper end of the grouting pipe passes through the grouting perforation and can extend into the installation hole together with the anchor rod. The grouting pipe has an insertion section for insertion into the installation hole and a connecting section for connecting grouting equipment. Both the insertion section and the connecting section are parallel to the extension direction of the perforation. The distance between the insertion section and the central axis of the perforation is less than the distance between the connecting section and the central axis of the perforation. There is an arc-shaped transition section between the insertion section and the connecting section.

2. The support plate for the mine anchoring grouting structure according to claim 1, characterized in that, There are two or more grouting pipes, and each grouting pipe is arranged at circumferential intervals around the perforation.

3. The support plate for the mine anchoring grouting structure according to claim 1, characterized in that, The arched portion is also provided with an exhaust port for venting air that is resisting grouting.

4. The support plate for the mine anchoring grouting structure according to claim 3, characterized in that, The diameter of the vent hole is smaller than the diameter of the grouting perforation hole.

5. The support plate for the mine anchoring grouting structure according to claim 1, characterized in that, The grouting pipe is connected to the arched part by spot welding or threaded connection.

6. A mining anchoring grouting structure, including a support plate and anchor bolts, characterized in that, The support plate is the support plate for mining anchoring and grouting structures as described in any one of claims 1 to 5.

7. The mining anchoring grouting structure according to claim 6, characterized in that, It also includes a positioning structure for connecting to the anchor bolt and fixing it to the grouting pipe.

8. The mining anchoring grouting structure according to claim 7, characterized in that, The positioning structure includes a fixing ring, which has a grouting fixing hole for the grouting pipe to pass through and an anchor fixing hole for the anchor rod to pass through. The grouting fixing hole is parallel to the axis of the anchor fixing hole.

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