Anchoring agent shaping device and displacement monitoring method for underground mine displacement monitoring

Abstract

The present invention discloses an anchor shaping device and displacement monitoring method for underground mine displacement monitoring. The shaping device comprises a base, comprising a bottom plate and a metal tube welded to the bottom plate, the inner diameter of the metal tube being consistent with the inner diameter of the blasthole; and a PVC tube capable of being inserted into the metal tube. The PVC tube is longer than the metal tube. This invention solves the current engineering problems of anchors that are difficult to match with the drill hole, lack density, and are difficult to apply to upward drilling.

Description

Technical field:

[0001] The present invention relates to an anchoring agent shaping device for underground mine displacement monitoring and a method for underground mine displacement monitoring using the device, and relates to technical fields such as underground engineering, mining technology, and rock mass displacement monitoring. Background technology:

[0002] When mining overburden minerals in underground mines, the resulting goaf requires strict monitoring of surface subsidence and surrounding rock deformation. Understanding the movement patterns of the overburden strata determines the range of rock layers that require control to guide production design. Displacement monitoring is a critical control step in the production process, directly impacting mine safety and project progress. Due to limited underground working space and diverse monitoring requirements, the ease of installation of monitoring equipment and the accuracy of monitoring data are paramount considerations for engineers.

[0003] According to current domestic and foreign literature, the current displacement monitoring of underground mines mainly adopts a multi-point displacement monitoring process. This process monitors by drilling holes and installing multi-point displacement meters in the holes, and anchors each measuring point through a measuring point anchor. The actual displacement of each measuring point is calculated by the relative displacement between different measuring points. The function of the measuring point anchor is to fix the measuring point at the predicted depth of the borehole. There are four main types of anchors: wooden anchors, grouting anchors, mechanical anchors, and hybrid anchors. Grouting anchors are commonly used in underground mines, and anchoring agents are used for measuring point anchoring. Due to the complexity of the underground space of mines, the diverse monitoring needs, and the influence of gravity, this process has the following main problems in application:

[0004] 1. Before solidification, the anchoring agent has a low density, is easily mixed with bubbles, is difficult to shape, and is often in a fluid state. When monitoring vertical holes or inclined holes, it is easily affected by gravity and easily falls off or undergoes significant deformation, making it difficult to ensure the anchoring effect.

[0005] 2. Because the diameter of underground mine holes and the diameter of the anchoring agent are difficult to match, it is difficult to ensure that the anchoring agent fully adheres to the hole wall during installation. If a suitable anchoring agent is required, it must be customized, but customization of anchoring agents is difficult and costly. Summary of the invention:

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a device and method for shaping anchors for displacement monitoring in underground mines. This device creates a micro-expanding, self-compacting anchor structure, significantly improving the anchor's shaping efficiency and its adherence to the hole wall, thereby reducing the difficulty of using the anchor in underground mines. This addresses the current engineering challenges of anchors being difficult to fit into the borehole, insufficiently compacted, and difficult to apply in upward drilling.

[0007] The present invention solves the technical problem by adopting the following technical solutions:

[0008] An anchoring agent shaping device for underground mine displacement monitoring, comprising:

[0009] A base, the base comprising a bottom plate and a metal tube welded to the bottom plate, wherein the inner diameter of the metal tube is consistent with the inner diameter of the blasthole;

[0010] Also included is a PVC tube that can be inserted into the metal tube.

[0011] Preferably, further, the length of the PVC tube is longer than that of the metal tube.

[0012] Preferably, when the PVC tube is inserted into the metal tube, the outer wall of the PVC tube is tightly fitted with the inner wall of the metal tube.

[0013] A method for monitoring displacement in an underground mine using the shaping device comprises the following steps:

[0014] Step 1: Design displacement monitoring points in the upper stope of the ore body and conduct drilling;

[0015] Step 2: Blow and clean the anchor hole, remove the gravel in the hole, and complete the hole cleaning operation;

[0016] Step 3: Fill the metal tube with an anchoring agent and bury an anchor head in the middle of the anchoring agent;

[0017] Step 4: Insert the PVC tube from the metal tube mouth, so that the anchoring agent enters the PVC tube under the action of squeezing to shape it;

[0018] Step 5: Take out the shaped anchoring agent and anchor head and place them in the designated position in the blasthole for displacement monitoring.

[0019] Before step 4, a layer of plastic film is wrapped around the mouth of the metal tube. When the PVC tube is inserted and shaped, the anchoring agent can be further reinforced to prevent deformation caused by unstable shaping.

[0020] Compared with the prior art, the beneficial effects of the present invention are embodied in:

[0021] The present invention comprehensively adopts a new displacement monitoring anchor shaping process method to form a micro-expanding self-compacting anchor structure. The circumferential constraint effect of the metal tube and PVC tube on the anchor and the anchor head significantly improves the efficiency of the anchor shaping and the density after shaping, and by changing the form of the anchor diameter, it makes it fit more closely with the borehole wall.

[0022] Furthermore, the plastic film's pressurized shaping expel internal bubbles from the anchor, further enhancing its mechanical conductivity. This resolves the engineering challenges of fracture zone support methods, which are characterized by low safety and inability to fully utilize the rock's internal self-stabilizing capacity. Description of the drawings:

[0023] Figure 1 It is a structural schematic diagram of the shaping device of the present invention;

[0024] Figure 2 This is a schematic diagram of the shaped anchoring agent and anchor head placed in the blasthole.

[0025] Numbers in the figure: 1 PVC pipe, 2 anchor head, 3 anchor agent, 4 base, 41 bottom plate, 42 metal pipe, 5 gravel, 6 blast hole.

[0026] The present invention will be further described below through specific implementation methods in conjunction with the accompanying drawings. Specific implementation method:

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Example: Referring to the accompanying drawings, the anchoring agent shaping device of the present invention is used for underground mine displacement monitoring, which includes:

[0029] The base 4 includes a bottom plate 41 and a metal tube 42 welded to the bottom plate 41 , wherein the axis of the metal tube is perpendicular to the plate surface of the bottom plate 41 , and the inner diameter of the metal tube 42 is consistent with the inner diameter of the blasthole;

[0030] The shaping device further comprises a PVC tube 1 which can be inserted into the metal tube 42 .

[0031] The length of the PVC tube 1 is longer than that of the metal tube 42 .

[0032] When the PVC tube 1 is inserted into the metal tube 42 , the outer wall of the PVC tube fits tightly with the inner wall of the metal tube, that is, the outer diameter of the PVC tube is slightly smaller than the inner diameter of the metal tube.

[0033] The method for monitoring displacement in underground mines using the above-mentioned shaping device comprises the following steps:

[0034] Step 1: Design displacement monitoring points in the upper stope of the ore body and conduct drilling;

[0035] Step 2: Blow and clean the anchor hole, remove the gravel 5 in the hole, and complete the hole cleaning operation;

[0036] Step 3: Load the anchoring agent 3 into the metal tube 42 and bury the anchor head 2 in the middle of the anchoring agent 3;

[0037] Step 4: Insert the PVC tube 1 from the metal tube mouth, so that the anchoring agent 3 enters the PVC tube 1 under the action of squeezing and shapes it;

[0038] Step 5: Take out the shaped anchoring agent 3 and anchor head 2, and place them in a designated position in the blasthole 6 for displacement monitoring.

[0039] In addition, before step 4, a layer of plastic film is wrapped around the mouth of the metal tube 42. While the PVC tube is being inserted and shaped, the anchor can be further reinforced to prevent deformation caused by unstable shaping. The present invention comprehensively adopts a new anchor shaping process to form a micro-expansion self-compacting anchor structure, which significantly improves the shaping efficiency of the anchor and the degree of fit between the anchor and the hole wall, reducing the difficulty of using the anchor in underground mines. This solves the current engineering practice problems of anchors that are difficult to match the size of the drill hole, lack of density, and difficulty in application to upward drilling.

[0040] It should be noted that some parts not described in detail in the present invention belong to the common knowledge in the art, or can be directly purchased from the market, and those skilled in the art can obtain them without creative work. The specific connection method has extremely wide applications in this art or daily life and will not be described in detail here.

[0041] In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent. Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for underground mine displacement monitoring using an anchor shaping device, the anchor shaping device comprising: A base (4), the base (4) comprising a bottom plate (41) and a metal tube (42) welded and fixed to the bottom plate (41), the inner diameter of the metal tube (42) being consistent with the inner diameter of the blasthole; Also included is a PVC tube (1) capable of being inserted into the metal tube (42); It is characterized in that the monitoring method comprises the following steps: Step 1: Design displacement monitoring points in the upper stope of the ore body and conduct drilling; Step 2: Blow and clean the anchor hole, remove the gravel in the hole, and complete the hole cleaning operation; Step 3: Load the anchoring agent (3) into the metal tube (42), and bury the anchor head (2) in the middle of the anchoring agent (3); Step 4: insert the PVC tube (1) from the metal tube mouth, so that the anchoring agent (3) enters the PVC tube (1) under the action of squeezing and is shaped; Step 5: Take out the shaped anchoring agent (3) and anchor head (2), and place them in the designated position in the blasthole (6) for displacement monitoring.

2. The underground mine displacement monitoring method according to claim 1, characterized in that: Before step 4, a layer of plastic film is wrapped around the mouth of the metal tube (42). When the PVC tube is inserted and shaped, the anchoring agent can be further reinforced to prevent deformation caused by unstable shaping.

3. The underground mine displacement monitoring method according to claim 1, characterized in that: The length of the PVC pipe (1) is longer than the length of the metal pipe (42).

4. The underground mine displacement monitoring method according to claim 1, characterized in that: When the PVC tube (1) is inserted into the metal tube (42), the outer wall of the PVC tube and the inner wall of the metal tube fit tightly together.

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