Microseismic monitoring device based on anchor rod

Abstract

The utility model discloses a micro-seismic monitoring device based on an anchor rod. The micro-seismic monitoring device comprises a switching assembly, a micro-seismic sensor and a shielding assembly. Wherein one end of the switching assembly is open, the inner diameter of the opening is larger than the diameter of the anchor rod, the switching assembly is suitable for being arranged on the anchor rod in a sleeving mode, and the other end of the switching assembly is closed and provided with a first bolt; a first bolt hole is formed in one end of the micro-seismic sensor and connected with the first bolt, and a signal cable is arranged at the other end of the micro-seismic sensor and connected with the host; the shielding assembly comprises a shielding outer shell and a shielding inner shell, a containing cavity is defined in the shielding inner shell, and the switching assembly and the microseismic sensor are arranged in the containing cavity; a shielding cavity is defined between the shielding outer shell and the shielding inner shell, and the shielding cavity is filled with a shielding material piece. When the micro-seismic monitoring device is used for installing the micro-seismic sensor on the anchor rod, noise, electromagnetic interference and the like can be shielded, the sensor is protected, and the micro-seismic monitoring device is light, portable, low in manufacturing cost and capable of being recycled and reused.

Description

Technical Field

[0001] This utility model relates to the field of microseismic monitoring technology, and in particular to a microseismic monitoring device based on anchor bolts. Background Technology

[0002] Microseismic monitoring technology has demonstrated wide applicability in rock mass stability assessment and dynamic disaster early warning in underground engineering projects such as mines and tunnels. Microseismic sensors are a core component, and the quality of their installation and coupling directly affects the accuracy of monitoring and the reliability of the system. Given the changing characteristics of underground engineering environments, drilling difficulties and easy borehole damage can occur in areas with high stress and unstable rock strata. Since rock masses in tunnels are mostly supported by anchor bolts / cables, a method of directly installing sensors on external structures such as anchor bolts / cables is convenient and allows for reusability. However, this method faces challenges due to the complex and variable underground environment and insufficient anti-interference capabilities. Microseismic sensors are inevitably susceptible to external interference during signal acquisition, affecting signal quality. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this utility model is to propose a micro-vibration monitoring device based on an anchor bolt, which, when a micro-vibration sensor is installed on the anchor bolt, can shield against noise and electromagnetic interference, protect the sensor, and is lightweight, portable, inexpensive, and recyclable.

[0004] To achieve the above objectives, a first aspect of this utility model provides a micro-vibration monitoring device based on an anchor bolt, comprising: a transition assembly, one end of which is open and the inner diameter of the opening is larger than the diameter of the anchor bolt, suitable for being fitted onto the anchor bolt; the other end of the transition assembly is closed and has a first bolt; a micro-vibration sensor, one end of which has a first bolt hole and is connected to the first bolt; the other end of which has a signal cable connected to a host computer; and a shielding assembly, comprising a shielding outer shell and a shielding inner shell, the shielding inner shell being located inside the outer shell and defining a receiving cavity therein, the transition assembly and the micro-vibration sensor being disposed in the receiving cavity; a shielding cavity is defined between the shielding outer shell and the shielding inner shell, the shielding cavity being filled with a shielding material.

[0005] In addition, the microseismic monitoring device based on anchor bolts according to the above embodiments of this utility model may also have the following additional technical features:

[0006] Specifically, the outer shell of the adapter assembly is provided with a plurality of second bolt holes, and the plurality of second bolts are respectively inserted into the plurality of second bolt holes to connect the adapter assembly to the anchor rod.

[0007] Specifically, the connection between the adapter assembly and the anchor rod, as well as the connection between the micro-vibration sensor and the adapter assembly, are coated with coupling agent.

[0008] Specifically, the outer shielding shell and the inner shielding shell are made of explosion-proof and flame-retardant materials.

[0009] Specifically, the shielding material includes a metal shielding layer, paper, and sound insulation felt, which are stacked sequentially from the outside to the inside.

[0010] Specifically, the shielding component includes a first sub-shielding component and a second sub-shielding component, the first sub-shielding component and the second sub-shielding component are detachably connected, and the first sub-shielding component and the second sub-shielding component are symmetrical.

[0011] Specifically, the first sub-shielding assembly and the second sub-shielding assembly are connected by a third bolt.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The adapter component used in this utility model can be used with almost all anchor rods / anchor cables used in underground engineering. Since the anchor rods / anchor cables are basically the same size, the design cost of the adapter component can be reduced. At the same time, the micro-vibration sensor is installed on the bolt at the bottom of the adapter component, making the installation and fixing operation convenient.

[0014] 2. Adding a coupling agent to the gaps between the adapter assembly and the anchor rod / anchor cable and the microseismic sensor can prevent rusting caused by high humidity and long service time in underground engineering, thus avoiding the problem of difficulty in recycling. At the same time, the coupling agent, when used with the microseismic sensor, can help the microseismic sensor to better collect microseismic signals.

[0015] 3. The outer shell of the shielding component is made of lightweight explosion-proof and flame-retardant material, which is used in conjunction with the internal sound insulation material. The sound insulation material includes a metal shielding layer, thick paper and sound insulation felt. The metal shielding material can effectively shield electromagnetic interference, while the thick paper and sound insulation felt are porous absorbent materials that can effectively shield noise, thereby minimizing the interference experienced by the exposed installation of the micro-vibration sensor.

[0016] 4. The entire device is simple to operate and easy to install, greatly reducing the complexity of on-site installation operations such as drilling. The entire device is lightweight, easy to process and carry. When the microseismic acquisition work is completed or the location needs to be changed, it can be recycled and reused, reducing labor and economic costs.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the anchor-based microseismic monitoring device according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of an adapter assembly according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a shielding assembly according to an embodiment of the present invention. Attached image description:

[0022] 1. Rock mass; 2. Anchor bolt; 3. Shielding assembly; 31. Shielding cavity; 32. Third bolt; 33. Shielding outer shell; 34. Shielding inner shell; 35. Receiving cavity; 36. First sub-shielding assembly; 37. Second sub-shielding assembly; 4. Adapter assembly; 41. First bolt; 42. Second bolt; 5. Micro-vibration sensor; 6. Signal cable; 7. Coupling agent. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] The microseismic monitoring device based on anchor bolts proposed in the embodiments of this utility model is described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the microseismic monitoring device based on anchor bolt 2 in this embodiment of the present invention may include: a transition component 4, a microseismic sensor 5, and a shielding component 3.

[0026] The adapter component 4 has an open end with an inner diameter larger than that of the anchor rod 2, suitable for being fitted onto the anchor rod 2. The other end of the adapter component 4 is closed and has a first bolt 41. One end of the micro-vibration sensor 5 has a first bolt hole for connection with the first bolt 41, and the other end of the micro-vibration sensor 5 has a signal cable 6 connected to the host. The shielding component 3 includes a shielding outer shell 33 and a shielding inner shell 34. The shielding inner shell 34 is located inside the outer shell and defines a receiving cavity 35. The adapter component 4 and the micro-vibration sensor 5 are disposed in the receiving cavity 35. A shielding cavity 31 is defined between the shielding outer shell 33 and the shielding inner shell 34, and the shielding cavity 31 is filled with shielding material.

[0027] Specifically, in this embodiment of the invention, the adapter component 4 has an outer diameter of 4cm, an inner diameter of 3cm, a total length of 5cm, and a first bolt length of 1cm. It is made of steel. The cross-sectional view of the adapter component 4 is shown below. Figure 2 As shown. The microseismic monitoring device is installed on the anchor rod 2 driven into the rock mass 1 in the underground roadway. The anchor rod 2 is 5m long, the exposed part is 20cm long and the diameter is 2cm; the main body of the microseismic sensor 5 is 8cm long; the total length of the shielding component 3 is 10cm.

[0028] Specifically, during installation, the first bolt hole of the micro-vibration sensor 5 is first connected to the first bolt 41 to fix the micro-vibration sensor 5 onto the adapter assembly 4. Then, the assembled adapter assembly 4 is fitted onto the anchor rod 2. After installation, the shielding assembly 3 is used to cover the micro-vibration sensor 5 and the adapter assembly 4, placing them within the receiving cavity 35. Thus, the micro-vibration monitoring device is installed, and the micro-vibration sensor 5 can begin operation. During the operation of the micro-vibration sensor 5, the shielding material of the shielding cavity 31 can shield against electromagnetic interference and noise interference, thereby improving the signal quality received by the micro-vibration sensor 5.

[0029] When the micro-vibration sensor 5 has finished working or needs to be moved to a different location to continue working, the shielding component 3, the transfer pin and the micro-vibration sensor 5 can be removed in sequence for recycling or reinstallation.

[0030] It should be noted that the adapter component 4 can be installed not only on the anchor bolt 2, but also on the anchor cable.

[0031] According to one embodiment of the present invention, such as Figure 1 As shown, the outer shell of the adapter assembly 4 is provided with multiple second bolt holes, and multiple second bolts 42 are respectively inserted into the multiple second bolt holes so that the adapter assembly 4 can be connected to the anchor rod 2.

[0032] Specifically, such as Figure 1 As shown, after the assembled adapter component 4 is fitted onto the anchor rod 2, multiple second bolts 42 can be passed through the corresponding second bolt holes and tightened to secure it. A slight shaking test can then be performed to check the installation effect and ensure that the adapter component 4 is firmly fixed to the anchor rod 2. This allows the adapter component 4 to be better secured to the anchor rod 2. The number of second bolt holes can be set according to actual needs; for example, it can be four.

[0033] According to one embodiment of the present invention, such as Figure 1 As shown, coupling agent 7 is applied to the connection between the adapter component 4 and the anchor rod 2, as well as the connection between the micro-vibration sensor 5 and the adapter component 4.

[0034] Specifically, adding coupling agent 7 at the connection between the adapter component 4 and the anchor rod 2, and at the connection between the micro-vibration sensor 5 and the adapter component 4, can prevent rusting problems caused by high humidity and long service time in underground engineering, thus avoiding the problem of difficulty in recycling. At the same time, the coupling agent 7, when used in conjunction with the micro-vibration sensor 5, can help the micro-vibration sensor 5 to better collect micro-vibration signals.

[0035] Specifically, before connecting the adapter component 4 to the anchor rod 2, coupling agent 7 can be applied to the opening of the adapter component 4; before connecting the adapter component 4 to the micro-vibration sensor 5, coupling agent 7 can be applied to the first bolt hole of the micro-vibration sensor 5. After installation, wipe off any excess coupling agent 7. In one embodiment of this invention, the coupling agent 7 can be petroleum jelly.

[0036] According to one embodiment of the present invention, the outer shielding shell 33 and the inner shielding shell 34 are made of lightweight explosion-proof and flame-retardant materials.

[0037] According to one embodiment of the present invention, the shielding material includes a metal shielding layer, paper, and sound insulation felt, which are stacked sequentially from the outside to the inside.

[0038] Specifically, the metal shielding layer can effectively shield electromagnetic interference, and the thick paper and sound insulation felt are porous absorbent materials that can effectively shield noise, thereby minimizing the interference experienced by the exposed installation of the micro-vibration sensor 5.

[0039] According to one embodiment of the present invention, such as Figure 3 As shown, the shielding component 3 includes a first sub-shielding component 36 and a second sub-shielding component 37. The first sub-shielding component 36 and the second sub-shielding component 37 are detachably connected and are symmetrical.

[0040] Furthermore, according to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, the first sub-shielding assembly 36 and the second sub-shielding assembly 37 are connected by a third bolt 32.

[0041] Specifically, such as Figure 3 As shown, the shielding assembly 3 is divided into two symmetrical parts: a first sub-shielding assembly 36 and a second sub-shielding assembly 37. After the adapter assembly 4 and the micro-vibration sensor 5 are installed and fixed on the anchor rod 2, the first sub-shielding assembly 36 and the second sub-shielding assembly 37 are used to cover the adapter assembly and the micro-vibration sensor 5, and the first sub-shielding assembly 36 and the second sub-shielding assembly 37 are fixed using the third bolt 32. Thus, the symmetrical first sub-shielding assembly 36 and the second sub-shielding assembly 37 facilitate the installation and removal of the shielding assembly 3.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A microseismic monitoring device based on anchor bolts, characterized in that, include: An adapter assembly, one end of which is open and the inner diameter of the opening is larger than the diameter of the anchor rod, suitable for being fitted onto the anchor rod; the other end of the adapter assembly is closed and has a first bolt. A micro-vibration sensor, one end of which is provided with a first bolt hole for connection to the first bolt, and the other end of which is provided with a signal cable for connection to the host computer; A shielding assembly includes a shielding outer shell and a shielding inner shell, the shielding inner shell being located inside the outer shell and defining a receiving cavity therein, the adapter assembly and the micro-vibration sensor being disposed in the receiving cavity; a shielding cavity is defined between the shielding outer shell and the shielding inner shell, the shielding cavity being filled with a shielding material.

2. The microseismic monitoring device based on anchor bolts according to claim 1, characterized in that, The outer shell of the adapter assembly is provided with a plurality of second bolt holes, and the plurality of second bolts are respectively inserted into the plurality of second bolt holes to connect the adapter assembly to the anchor rod.

3. The microseismic monitoring device based on anchor bolts according to claim 1, characterized in that, The connection points between the adapter assembly and the anchor rod, as well as the connection points between the micro-vibration sensor and the adapter assembly, are coated with coupling agent.

4. The microseismic monitoring device based on anchor bolts according to claim 1, characterized in that, The outer shielding shell and the inner shielding shell are made of explosion-proof and flame-retardant materials.

5. The microseismic monitoring device based on anchor bolts according to claim 1, characterized in that, The shielding material includes a metal shielding layer, paper, and sound insulation felt, which are stacked sequentially from the outside to the inside.

6. The microseismic monitoring device based on anchor bolts according to claim 1, characterized in that, The shielding component includes a first sub-shielding component and a second sub-shielding component, the first sub-shielding component and the second sub-shielding component are detachably connected, and the first sub-shielding component and the second sub-shielding component are symmetrical.

7. The microseismic monitoring device based on anchor bolts according to claim 6, characterized in that, The first sub-shielding assembly and the second sub-shielding assembly are connected by a third bolt.

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