CN216246110U - Roadway displacement monitoring system in similar simulation test - Google Patents
Roadway displacement monitoring system in similar simulation test Download PDFInfo
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- CN216246110U CN216246110U CN202122659029.9U CN202122659029U CN216246110U CN 216246110 U CN216246110 U CN 216246110U CN 202122659029 U CN202122659029 U CN 202122659029U CN 216246110 U CN216246110 U CN 216246110U
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 92
- 238000004088 simulation Methods 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 239000013307 optical fiber Substances 0.000 claims abstract description 52
- 238000009434 installation Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 30
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 230000035882 stress Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006355 external stress 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
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
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Abstract
The utility model discloses a roadway displacement monitoring system in a similar simulation test, which comprises a base, wherein the base comprises a telescopic rod and a base support, and the telescopic rod is fixed on the base support; the fiber bragg grating sensing mechanism comprises a displacement measuring device, fiber connectors, an installation shell, a fiber coupler and a connecting seat, wherein the connecting seat is fixedly connected to the middle of one side of the installation shell, the connecting seat is fixedly connected with the free end part of the telescopic rod, the displacement measuring device comprises a plurality of groups, the installation shell is circular, the displacement measuring device is connected to the outer peripheral side of the installation shell in a sliding mode, and fastening bolts for fixing the displacement measuring device are connected to the periphery of the installation shell; the displacement measuring device is used for measuring the displacement of a top plate, a bottom plate, two sides and an arch waist of the similar simulation tunnel; the optical fiber coupler is positioned in the installation shell and is respectively connected with the displacement measuring device through an optical fiber connector; the optical fiber demodulator is connected with the optical fiber coupler through an optical fiber; the computer system is connected with the optical fiber demodulator through an optical cable.
Description
Technical Field
The utility model relates to a roadway displacement monitoring technology, in particular to a roadway displacement monitoring system in a similar simulation test.
Background
A large number of tunnels need to be tunneled in the underground mining process, the tunnels can be displaced and deformed under the action of an underground stress field, a temperature field, blasting vibration, mechanical vibration and other complex environmental conditions, accidents such as roof fall and rib spalling can occur due to the fact that the deformed tunnels are not controlled in time, and the safety of operators is seriously threatened.
The physical analog simulation test is a common method for researching the safety and stability of an underground mine roadway, displacement monitoring of the roadway in the current analog simulation test is carried out by arranging strain gauges around the roadway, but the strain gauges have the defect that the displacement of the surface of the roadway cannot be directly measured, and the displacement of the inner surface of the roadway is estimated by measuring the displacement of surrounding rocks around the roadway; the method has the advantages of multiple installation steps, complex operation, inconvenience in operation and low precision, and a plurality of strain gauges need to be arranged around the roadway.
Therefore, how to provide a monitoring system which is convenient to operate, has high precision and can directly measure the displacement of the roadway in the analog simulation test is a problem that needs to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a system for monitoring roadway displacement in a similar simulation test, which is convenient to operate and has high measurement precision.
In order to achieve the purpose, the utility model adopts the following technical scheme: a system for monitoring roadway displacement in a similar simulation test comprises:
the base comprises a telescopic rod and a base support, and the telescopic rod is fixed on the base support;
the fiber bragg grating sensing mechanism comprises a connecting seat, an installation shell, a displacement measuring device, a fiber coupler and a fiber connector, wherein the displacement measuring device is used for measuring the displacement of a top plate, a bottom plate, two sides and an arch waist of a similar simulation roadway; the mounting shell is provided with an outer circumferential surface, and fastening bolts are connected to the periphery of the mounting shell; the displacement measuring devices comprise a plurality of groups, and the displacement measuring devices are connected to the outer circumferential surface side of the mounting shell in a sliding mode and can be fixed through the fastening bolts; the optical fiber coupler is positioned in the installation shell, and two ends of the optical fiber connector are respectively connected with the displacement measuring device and the optical fiber coupler;
the optical fiber demodulator is connected with the optical fiber coupler through an optical fiber;
and the computer system is connected with the optical fiber demodulator through an optical cable and is used for receiving and processing the displacement data of the displacement measuring device.
The utility model has the beneficial effects that: the displacement deformation of the top plate, the bottom plate, the two sides and the arch position of the analog simulation tunnel is measured by the fiber bragg grating sensing mechanism, and the fiber bragg grating sensing mechanism is connected with a computer system by the fiber coupler and the fiber demodulator to receive measurement data, so that the tunnel displacement in the analog simulation test can be directly, continuously monitored in real time; the fiber grating sensing mechanism has the advantages and characteristics of strong interference resistance, high sensitivity and high precision, can provide accurate measurement data for the displacement of the roadway in the analog simulation test, is simple in overall structure installation and convenient to operate, avoids complex and tedious installation process, simultaneously ensures the measurement precision, and has wide prospects in the field of roadway displacement measurement in the analog simulation test.
Preferably, the displacement measuring device comprises a probe shell, a spring, a probe, a fiber grating displacement sensor, a protective sleeve and a sliding seat, wherein a probe hole is formed in the top of the probe shell, one end of the probe is located in the probe hole, the spring is located in the probe shell, one end of the spring is fixedly connected with one end of the probe, and the other end of the spring is connected with the fiber grating displacement sensor; the protective sleeve is fixedly positioned on the periphery of the fiber bragg grating displacement sensor, and the probe shell is fixedly connected to the sliding seat; the periphery of the mounting shell is annularly provided with a sliding chute, and the sliding seat is connected in the sliding chute in a sliding manner; the fastening bolt is fixedly connected to the side wall of the sliding groove and can abut against the side wall of the sliding seat, and two ends of the optical fiber connector are respectively connected with the fiber grating displacement sensor and the optical fiber coupler.
Preferably, the optical fiber demodulator is located at the outer side of the installation shell, an optical fiber hole is formed in one side of the installation shell, the optical fiber coupler is connected with an optical fiber, and the optical fiber penetrates through the optical fiber hole to be connected with the optical fiber demodulator.
Drawings
FIG. 1 is a structural diagram of a roadway displacement monitoring system in a similar simulation test according to the present invention;
FIG. 2 is a schematic structural diagram of a fiber grating sensing mechanism of a roadway displacement monitoring system in a similar simulation test according to the present invention;
FIG. 3 is a structural cross-sectional view of a fiber grating sensing mechanism of a roadway displacement monitoring system in a similar simulation test according to the present invention;
FIG. 4 is a cross-sectional view of a displacement measuring device in a fiber grating sensing mechanism of a roadway displacement monitoring system in a similar simulation test according to the present invention;
FIG. 5 is a front view of a fiber grating sensing mechanism of a roadway displacement monitoring system in a similar simulation test according to the present invention;
fig. 6 is a schematic view of a base of a roadway displacement monitoring system in a similar simulation test according to the present invention.
The device comprises a similar simulation roadway 1, a base 2, a telescopic rod 21, a base 22 support, a fiber bragg grating sensing mechanism 3, a displacement measuring device 31, a probe 311, a probe shell 312, a sliding seat 313, a spring 314, a fiber bragg grating displacement sensor 315, a protective sleeve 316, a fiber optic connector 32, a mounting shell 33, a fiber optic coupler 34, a connecting seat 35, a fiber optic demodulator 4, a computer system 5, a fiber optic hole 6, a fastening bolt 7, a fiber optic cable 8 and a fiber optic cable 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6 of the present disclosure, a system for monitoring roadway displacement in a similar simulation test according to an embodiment of the present disclosure includes:
the base 2, the base 2 includes the telescopic link 21 and base support 22, the telescopic link 21 is fixed on base support 22;
the fiber bragg grating sensing mechanism 3 comprises a connecting seat 35, an installation shell 33, a displacement measuring device 31 for measuring the displacement of a top plate, a bottom plate, two sides and an arch waist of the similar simulation roadway 1, a fiber coupler 34 and a fiber connector 32, wherein the connecting seat 35 is fixedly connected to the middle of one side of the installation shell 33, and the connecting seat 35 is fixedly connected with the free end part of the telescopic rod 21; the mounting shell is provided with an outer circumferential surface, and fastening bolts 7 are connected to the periphery of the mounting shell; the displacement measuring device 31 comprises a plurality of sets, the displacement measuring device 31 is connected on the outer circumferential surface side of the mounting shell 33 in a sliding way and can be fixed by the fastening bolt 7; the optical fiber coupler 34 is positioned in the installation shell 33, and two ends of the optical fiber connector 32 are respectively connected with the displacement measuring device 31 and the optical fiber coupler 34;
the optical fiber demodulator 4 is connected with the optical fiber coupler 34 through an optical fiber 8;
and the computer system 5 is connected with the optical fiber demodulator 4 through the optical cable 9 and used for receiving and processing the displacement data of the displacement measuring device 31.
In other embodiments, the displacement measuring device 31 includes a probe 311, a probe housing 312, a sliding seat 313, a spring 314, a fiber grating displacement sensor 315 and a protective sleeve 316, a probe hole is opened at the top of the probe housing 312, the probe 311 is located in the probe hole, the spring 314 is located inside the probe housing 312, one end of the spring is fixedly connected to the bottom of the probe 311, the other end of the spring 314 is connected to the fiber grating displacement sensor 315, the protective sleeve 316 is fixedly located at the periphery of the fiber grating displacement sensor 315, the probe housing 312 is fixedly connected to the sliding seat 313, a sliding groove is annularly arranged on the periphery of the mounting housing 33, the sliding seat 313 is slidably connected in the sliding groove, a fastening bolt 7 is connected to a side wall of the sliding groove, the fastening bolt 7 abuts against the side wall of the sliding seat 313 and fixes the circumferential rotation position of the sliding seat 313, and the fiber joint 32 is connected to the fiber grating displacement sensor 315.
Specifically, the tunnel generates displacement to cause the probe to move downwards, the spring compresses, the spring transmits stress to the fiber grating displacement sensor, the stress applied to the fiber grating displacement sensor changes, the grating pitch of the grating changes, and accordingly the reflection wavelength changes, the fiber demodulator deduces external stress changes through detecting the wavelength changes, and the computer system further deduces the displacement changes. The fiber coupler is used for collecting signals of 5 displacement measuring devices.
In other embodiments, the fiber-optic demodulator 4 is located outside the mounting housing 33, a fiber-optic hole 6 is formed in one side of the mounting housing 33, the fiber-optic coupler 34 is connected to the optical fiber 8, and the optical fiber is connected to the fiber-optic demodulator 4 through the fiber-optic hole 6.
The utility model also discloses a method for monitoring roadway displacement in the similar simulation test, which comprises the following steps:
the method comprises the following steps that firstly, a base is placed to a proper position according to the position of a similar simulation test roadway, and the position of a fiber grating sensing mechanism is adjusted by adjusting the position of a telescopic rod to enable the fiber grating sensing mechanism to be located in the middle of the similar simulation roadway;
adjusting fastening bolts on the periphery of the mounting shell to enable the plurality of displacement measuring devices to be perpendicular to and in close contact with a roadway top plate, a roadway bottom plate, two sides and a roadway arch respectively;
connecting the optical fiber coupler with an optical fiber demodulator, connecting the optical fiber demodulator with an optical cable, and connecting the optical cable with a computer system;
and fourthly, monitoring and recording the displacement data of the roadway in the similar simulation test in real time through a computer system.
The fiber grating displacement sensor can rotate around the center of the mounting shell, and the fastening bolt is used for fixing the fiber grating displacement sensor so as to adjust the fiber grating displacement sensor to a position to be monitored.
The utility model can realize the direct, real-time and continuous monitoring of the roadway displacement in the similar simulation test; the fiber bragg grating sensing mechanism is used as a displacement sensing device, so that the fiber bragg grating displacement sensing device has the advantages of strong anti-interference, high sensitivity and high precision, and can provide accurate measurement data for the displacement of the tunnel in a similar simulation test; the displacement of a top plate, a bottom plate, two sides and an arch waist of the tunnel in a similar simulation test can be monitored simultaneously by adopting a plurality of groups of fiber bragg grating displacement sensors, and a computer system can obtain displacement data of the tunnel in real time; the method is convenient to operate, avoids complex and tedious installation process, simultaneously ensures the measurement precision, and has wide prospect in the field of roadway displacement measurement in the analog simulation test.
For the device and the using method disclosed by the embodiment, the description is simple because the device and the using method correspond to the method disclosed by the embodiment, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A roadway displacement monitoring system in a similar simulation test is characterized by comprising:
the base (2), the said base (2) includes telescopic link (21) and base support (22), the said telescopic link (21) is fixed on said base support (22);
the fiber bragg grating sensing mechanism (3), the fiber bragg grating sensing mechanism (3) comprises a connecting seat (35), an installation shell (33), a displacement measuring device (31) for measuring the displacement of a top plate, a bottom plate, two sides and an arch waist of the similar simulation roadway (1), an optical fiber coupler (34) and an optical fiber connector (32), the connecting seat (35) is fixedly connected to the middle of one side of the installation shell (33), and the connecting seat (35) is fixedly connected with the free end part of the telescopic rod (21); the mounting shell is provided with an outer circumferential surface, and fastening bolts (7) are connected to the periphery of the mounting shell; the displacement measuring devices (31) comprise a plurality of groups, and the displacement measuring devices (31) are connected to the outer circumferential surface side of the mounting shell (33) in a sliding mode and can be fixed through the fastening bolts (7); the optical fiber coupler (34) is positioned in the installation shell (33), and two ends of the optical fiber joint (32) are respectively connected with the displacement measuring device (31) and the optical fiber coupler (34);
the optical fiber demodulator (4), the optical fiber demodulator (4) is connected with the optical fiber coupler (34) through an optical fiber (8);
the computer system (5) is connected with the optical fiber demodulator (4) through an optical cable (9) and used for receiving and processing displacement data of the displacement measuring device (31).
2. The system for monitoring the roadway displacement in the similar simulation test as in claim 1, wherein the displacement measuring device (31) comprises a probe housing (312), a spring (314), a probe (311), a fiber grating displacement sensor (315), a protective sleeve (316) and a sliding seat (313), a probe hole is formed in the top of the probe housing (312), one end of the probe (311) is located in the probe hole, the spring (314) is located inside the probe housing (312) and one end of the spring is fixedly connected with one end of the probe (311), and the other end of the spring (314) is connected with the fiber grating displacement sensor (315); the protective sleeve (316) is fixedly arranged on the periphery of the fiber bragg grating displacement sensor (315), and the probe shell (312) is fixedly connected to the sliding seat (313); a sliding groove is formed in the periphery of the mounting shell (33) in a surrounding mode, and the sliding seat (313) is connected in the sliding groove in a sliding mode; the fastening bolt (7) is fixedly connected to the side wall of the sliding groove and can abut against the side wall of the sliding seat (313), and two ends of the optical fiber connector (32) are respectively connected with the optical fiber grating displacement sensor (315) and the optical fiber coupler.
3. A system for monitoring roadway displacement in simulation-like test as claimed in claim 2, wherein the optical fiber demodulator (4) is located at the outer side of the installation housing (33), a fiber hole (6) is opened at one side of the installation housing (33), the optical fiber coupler (34) is connected with the optical fiber (8), and the optical fiber is connected with the optical fiber demodulator (4) through the fiber hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122659029.9U CN216246110U (en) | 2021-11-02 | 2021-11-02 | Roadway displacement monitoring system in similar simulation test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122659029.9U CN216246110U (en) | 2021-11-02 | 2021-11-02 | Roadway displacement monitoring system in similar simulation test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216246110U true CN216246110U (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122659029.9U Expired - Fee Related CN216246110U (en) | 2021-11-02 | 2021-11-02 | Roadway displacement monitoring system in similar simulation test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216246110U (en) |
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2021
- 2021-11-02 CN CN202122659029.9U patent/CN216246110U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |