CN203587255U - Fiber Bragg grating earth pressure sensing device for detecting pressure of coal mine roadway surrounding rock - Google Patents
Fiber Bragg grating earth pressure sensing device for detecting pressure of coal mine roadway surrounding rock Download PDFInfo
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- CN203587255U CN203587255U CN201320730357.6U CN201320730357U CN203587255U CN 203587255 U CN203587255 U CN 203587255U CN 201320730357 U CN201320730357 U CN 201320730357U CN 203587255 U CN203587255 U CN 203587255U
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- fiber bragg
- optical fiber
- surrounding rock
- bragg raster
- sensing device
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- 239000011435 rock Substances 0.000 title claims abstract description 40
- 239000003245 coal Substances 0.000 title abstract description 9
- 238000004873 anchoring Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000013307 optical fiber Substances 0.000 claims description 50
- 239000002689 soil Substances 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract 5
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to a fiber Bragg grating earth pressure sensing device for detecting pressure of a coal mine roadway surrounding rock, and belongs to the technical field of optoelectronic measurement. The fiber Bragg grating earth pressure sensing device includes anchoring ends, fiber Bragg grating earth pressure sensors, anchor rods, a roadway surrounding rock, a roadway, trays and nuts. The anchoring ends are disposed at the top portions of the anchor rods. The fiber Bragg grating earth pressure sensors are disposed on the trays. The anchor rods exposed to the roadway are connected with the trays. The tail ends of the trays are secured with the nuts. An anchoring agent is used for anchoring the anchoring ends and the anchor rods, and anchoring the anchor rods and the roadways. The fiber Bragg grating earth pressure sensing device provided by the utility model is simple in structure and easy to operate; achieves real-time online monitoring of the pressure of the roadway surrounding rock; and meanwhile has a high anti-interference capability.
Description
Technical field
The utility model relates to a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, belongs to photoelectron field of measuring technique.
Background technology
The detection of mine roof and country rock is the big event of mine disaster prediction, and it is one of especially big disaster of all kinds of mines that Roof Falling in Mine country rock caves in, and the production safety in mine in serious threat, during generation, can cause huge economic loss and casualties.Due to the continuous extension of development end and the expansion of limit of mining, mine is produced and is developed in depth, the threat of roof fall, landslide is also day by day serious, the task of preventing and treating is also more and more arduous, so can guarantee the normal production of mine and the life security of down-hole miner to the Real-Time Monitoring of mine roof and country rock, promote the security of coal production.
It is three aspects that country rock problem highlights: the one, and the dropping situations of top board; The 2nd, the assessment of bolt supporting stability and potentially danger prediction; The 3rd, the speed of advancement of leading abutment pressure coverage, pressure etc.
Due to the frequent movement of workplace, new geological phenomenon and new geological problem constantly occur (as do not planned a successor in mining process, complicated and changeable in conjunction with mine formation condition of living in, borehole wall force-bearing situation, therefore, measure the stress of the borehole wall, the variation of strain regime, the normal production to colliery and personal security are carried out real time monitoring and are just seemed extremely important.At present, this work is all often observed or completed according to the experience accumulating in production run by manual type, the variation of grasping in real time coal mine roadway country rock is just very difficult, be affected by human factors on the other hand larger, very likely leak and adopt representative data, thereby it is just very difficult to grasp in real time the force-bearing situation of coal mine roadway country rock.
For the dynamic change of grasp coal mine roadway country rock promptly and accurately, by adopting optical fiber Bragg raster soil pressure sensor when realizing the Real-Time Monitoring of roadway surrounding rock pressure, need to consider the formation of optical fiber Bragg raster soil pressure sensor, and how install to realize the monitoring problem to roadway surrounding rock pressure.
Summary of the invention
The utility model provides a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, structure, the installation question of optical fiber Bragg raster soil pressure sensing device when solving the real time on-line monitoring to roadway surrounding rock pressure.
The technical solution of the utility model is: a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, comprises anchored end 1, optical fiber Bragg raster soil pressure sensor 2, anchor pole 3, lane side country rock 4, tunnel 5, pallet 6, nut 7; Wherein anchored end 1 is placed in the top of anchor pole 3, and optical fiber Bragg raster soil pressure sensor 2 is placed on pallet 6, exposes to the anchor pole 3 in tunnel 5 and is connected with pallet 6, and pallet 6 ends are fastening with nuts 7.
Between described anchored end 1 and anchor pole 3, carry out anchoring by Anchor Agent between anchor pole 3 and tunnel 5.
Described optical fiber Bragg raster soil pressure sensor 2 is connected with optical fiber Bragg raster (FBG) demodulator.
Described anchor pole 3 is 0 °～90 ° with the angle of level ground.
During use, by Anchor Agent, anchored end 1 and anchor pole 3 are carried out to omnidistance anchoring, the anchor pole 3 exposing outside hole is connected with pallet 6, optical fiber Bragg raster soil pressure sensor 2 is positioned on pallet 6, pallet 6 ends are fastening with nut 7, when country rock changes, optical fiber Bragg raster soil pressure sensor 2 can detect that the pressure of lane side country rock changes.
The beneficial effects of the utility model are:
1, realized the real time on-line monitoring to roadway surrounding rock pressure;
2, antijamming capability is strong: adopt optical fiber Bragg raster means to measure, have advantages of the interference of the external electromagnetic of not being subject to;
3, simple in structure, convenient operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Each label in figure: 1 be anchored end, 2 for optical fiber Bragg raster soil pressure sensor, 3 for anchor pole, 4 for lane side country rock, 5 for tunnel, 6 for pallet, 7 be nut.
Embodiment
Embodiment 1: as shown in Figure 1, a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, comprises anchored end 1, optical fiber Bragg raster soil pressure sensor 2, anchor pole 3, lane side country rock 4, tunnel 5, pallet 6, nut 7; Wherein anchored end 1 is placed in the top of anchor pole 3, and optical fiber Bragg raster soil pressure sensor 2 is placed on pallet 6, exposes to the anchor pole 3 in tunnel 5 and is connected with pallet 6, and pallet 6 ends are fastening with nuts 7.Between described anchored end 1 and anchor pole 3, carry out anchoring by Anchor Agent between anchor pole 3 and tunnel 5.Described optical fiber Bragg raster soil pressure sensor 2 is connected with optical fiber Bragg raster (FBG) demodulator.
Described anchor pole 3 is 0 ° with the angle of level ground.
Its concrete implementation step is:
1, coal mine roadway top bore diameter 28mm, bolt diameter 24mm, rock-bolt length 6m.
2, with optical fiber Bragg raster (FBG) demodulator, obtain the Bragg wavelength of optical fiber Bragg raster.
3, when the initial Bragg wavelength of optical fiber Bragg raster is
=1557.732nm, when described anchor pole 3 is 0 ° with the angle of level ground,
for the measurement wavelength value of optical fiber Bragg raster is 1558.122nm, according to the relational expression between wavelength variations value and roadway surrounding rock pressure
show that roadway surrounding rock pressure is 860.448KPa, wherein pressure coefficient
=2206.278.
Embodiment 2: as shown in Figure 1, a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, comprises anchored end 1, optical fiber Bragg raster soil pressure sensor 2, anchor pole 3, lane side country rock 4, tunnel 5, pallet 6, nut 7; Wherein anchored end 1 is placed in the top of anchor pole 3, and optical fiber Bragg raster soil pressure sensor 2 is placed on pallet 6, exposes to the anchor pole 3 in tunnel 5 and is connected with pallet 6, and pallet 6 ends are fastening with nuts 7.Between described anchored end 1 and anchor pole 3, carry out anchoring by Anchor Agent between anchor pole 3 and tunnel 5.Described optical fiber Bragg raster soil pressure sensor 2 is connected with optical fiber Bragg raster (FBG) demodulator.
Described anchor pole 3 is 45 ° with the angle of level ground.
Its concrete implementation step is:
1, coal mine roadway top bore diameter 28mm, bolt diameter 24mm, rock-bolt length 6m.
2, with optical fiber Bragg raster (FBG) demodulator, obtain the Bragg wavelength of optical fiber Bragg raster.
3, when the initial Bragg wavelength of optical fiber Bragg raster is
=1557.732nm, when described anchor pole 3 is 45 ° with the angle of level ground,
for the measurement wavelength value of optical fiber Bragg raster is 1558.469nm, according to the relational expression between wavelength variations value and roadway surrounding rock pressure
show that roadway surrounding rock pressure is 1626.027KPa, wherein pressure coefficient
=2206.278.
Embodiment 3: as shown in Figure 1, a kind of optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock, comprises anchored end 1, optical fiber Bragg raster soil pressure sensor 2, anchor pole 3, lane side country rock 4, tunnel 5, pallet 6, nut 7; Wherein anchored end 1 is placed in the top of anchor pole 3, and optical fiber Bragg raster soil pressure sensor 2 is placed on pallet 6, exposes to the anchor pole 3 in tunnel 5 and is connected with pallet 6, and pallet 6 ends are fastening with nuts 7.Between described anchored end 1 and anchor pole 3, carry out anchoring by Anchor Agent between anchor pole 3 and tunnel 5.Described optical fiber Bragg raster soil pressure sensor 2 is connected with optical fiber Bragg raster (FBG) demodulator.
Described anchor pole 3 is 90 ° with the angle of level ground.
Its concrete implementation step is:
1, coal mine roadway top bore diameter 28mm, bolt diameter 24mm, rock-bolt length 6m.
2, with optical fiber Bragg raster (FBG) demodulator, obtain the Bragg wavelength of optical fiber Bragg raster.
3, when the initial Bragg wavelength of optical fiber Bragg raster is
=1557.732nm, when described anchor pole 3 is 90 ° with the angle of level ground,
for the measurement wavelength value of optical fiber Bragg raster is 1558.022nm, according to the relational expression between wavelength variations value and roadway surrounding rock pressure
show that roadway surrounding rock pressure is 639.821KPa, wherein pressure coefficient
=2206.278.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make various variations.
Claims (4)
1. for detection of an optical fiber Bragg raster soil pressure sensing device for lane, colliery side pressure from surrounding rock, it is characterized in that: comprise anchored end (1), optical fiber Bragg raster soil pressure sensor (2), anchor pole (3), lane side country rock (4), tunnel (5), pallet (6), nut (7); Wherein anchored end (1) is placed in the top of anchor pole (3), and it is upper that optical fiber Bragg raster soil pressure sensor (2) is placed in pallet (6), and the anchor pole (3) that exposes to tunnel (5) is connected with pallet (6), and pallet (6) nut for end (7) is fastening.
2. the optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock according to claim 1, is characterized in that: between described anchored end (1) and anchor pole (3), carry out anchoring by Anchor Agent between anchor pole (3) and tunnel (5).
3. the optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock according to claim 1, is characterized in that: described optical fiber Bragg raster soil pressure sensor (2) is connected with optical fiber Bragg raster (FBG) demodulator.
4. the optical fiber Bragg raster soil pressure sensing device for detection of lane, colliery side pressure from surrounding rock according to claim 1, is characterized in that: described anchor pole (3) is 0 °～90 ° with the angle of level ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320730357.6U CN203587255U (en) | 2013-11-19 | 2013-11-19 | Fiber Bragg grating earth pressure sensing device for detecting pressure of coal mine roadway surrounding rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320730357.6U CN203587255U (en) | 2013-11-19 | 2013-11-19 | Fiber Bragg grating earth pressure sensing device for detecting pressure of coal mine roadway surrounding rock |
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|---|---|
| CN203587255U true CN203587255U (en) | 2014-05-07 |
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| CN201320730357.6U Expired - Fee Related CN203587255U (en) | 2013-11-19 | 2013-11-19 | Fiber Bragg grating earth pressure sensing device for detecting pressure of coal mine roadway surrounding rock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882228A (en) * | 2019-04-01 | 2019-06-14 | 中国科学院武汉岩土力学研究所 | A kind of anchor pole and country rock strain continuous monitoring method |
| CN117647340A (en) * | 2024-01-30 | 2024-03-05 | 成都工业职业技术学院 | Mining roof pressure detection device based on optical fiber sensor |
-
2013
- 2013-11-19 CN CN201320730357.6U patent/CN203587255U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882228A (en) * | 2019-04-01 | 2019-06-14 | 中国科学院武汉岩土力学研究所 | A kind of anchor pole and country rock strain continuous monitoring method |
| CN117647340A (en) * | 2024-01-30 | 2024-03-05 | 成都工业职业技术学院 | Mining roof pressure detection device based on optical fiber sensor |
| CN117647340B (en) * | 2024-01-30 | 2024-03-29 | 成都工业职业技术学院 | Mining roof pressure detection device based on optical fiber sensor |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20141119 |
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| EXPY | Termination of patent right or utility model |