CN102183202A - Borehole wall deformation sensor and test method thereof - Google Patents
Borehole wall deformation sensor and test method thereof Download PDFInfo
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- CN102183202A CN102183202A CN 201110079621 CN201110079621A CN102183202A CN 102183202 A CN102183202 A CN 102183202A CN 201110079621 CN201110079621 CN 201110079621 CN 201110079621 A CN201110079621 A CN 201110079621A CN 102183202 A CN102183202 A CN 102183202A
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- borehole wall
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- steel pipe
- deformation
- wall deformation
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Abstract
The invention relates to a borehole wall deformation sensor and a test method thereof. The sensor mainly comprises a steel pipe, a T-shaped holder which is located in the steel pipe, a sensitive component which is located in the middle of the T-shaped holder, and a data wire which is arranged on the sensitive component and connected with a resistance meter. the strain size of a borehole wall is test on the basis of piezoresistive properties, the resistance value of the sensitive component changes, the data wire is used for acquire the resistance value, thus, the borehole wall deformation test is realized. By the sensor and the test method thereof disclosed by the invention, the deformation of the borehole wall in different directions can be tested through adjusting installation angles. The sensor is convenient to install and has the advantages of simple structure, low cost and high reliability.
Description
Technical field
The present invention relates to a kind of deformation-sensor and method of testing thereof, particularly be applicable to the sensor and the method for testing thereof of borehole wall deformation test, also be applicable to the deformation test of other similar xoncrete structures.
Background technology
Extensive shaft wall fracture disaster badly influences the normal operation and the production of mine, and the deformation monitoring of the borehole wall when normally moving is the effective means that obtains the borehole wall health status and the sign of breaking.The sensor that is used for borehole wall deformation test at present often uses concrete strain gauge, mainly comprises two kinds of type vibration wire and differential resistance types.When this strainometer uses, respectively in the borehole wall along vertical and laterally respectively lay one, thereby realize the test job of and transversely deforming vertical to the borehole wall.When burying underground, must guarantee on the borehole wall, to offer rectangular slot, and size to satisfy the size of this strainometer, and will guarantee that the angle of this strainometer is difficult when installing.Nowadays the Fibre Optical Sensor of Chu Xianing also is useful on borehole wall deformation test report, but its price too expensive.For this reason, it is necessary studying a kind of novel borehole wall deformation test sensor easy for installation, lower-cost and method of testing thereof.
Summary of the invention
Technical matters: the purpose of invention is to overcome the problem that exists in the prior art, provide a kind of simple in structure, cost is low, the borehole wall deformation-sensor and the method for testing thereof of easy for installation, good reliability.
Technical scheme: borehole wall deformation-sensor of the present invention, comprise that steel pipe, symmetry are located at the T shape fixed mount in the steel pipe, the middle part of T shape fixed mount is provided with the sensitive element that is made by conductive rubber composite material, and sensitive element is provided with the data conductor that links to each other with resistance meter through copper plate electrode.
Borehole wall deformation test method of the present invention may further comprise the steps:
A. at first bore a hole at least on an aspect of the test borehole wall, the external diameter of the steel pipe of the diameter of boring and borehole wall deformation-sensor coincide;
B. select the setting angle of T shape fixed mount according to required test request, borehole wall deformation-sensor is installed in the boring, with the steel pipe of sand-cement slurry filling borehole wall deformation-sensor and the space between the hole;
C. data conductor is connected with signal picker,, is located at the resistance value of the sensitive element in the T shape fixed mount, can realize strain testing borehole wall different directions by collection along with the pressure-bearing of the borehole wall changes.
Beneficial effect: the present invention can realize the test of shaft wall structure different directions strain.Adopt lower-cost carbon fiber/black rubber compound substance to make sensitive element, the steel pipe of sensor outer ring and borehole wall deform in same pace also drive connecting link and act on sensitive element, resistance value through sensitive element changes, and gathers resistance value by data connecting line, realizes the test of borehole wall distortion.This sensor can be controlled its angle when mounted, realizes the test to the strain of borehole wall different directions.Sensor corresponding to existing borehole wall deformation test is used has characteristics simple in structure, that cost is low, easy for installation.
Description of drawings:
Fig. 1 is a borehole wall deformation-sensor synoptic diagram of the present invention.
Among the figure: the 1-steel pipe; 2-T shape fixed mount; The 3-sensitive element; The 4-data conductor.
Embodiment:
Below in conjunction with accompanying drawing one embodiment of the invention is further described:
Borehole wall deformation-sensor of the present invention mainly is made of steel pipe 1, T shape fixed mount 2, sensitive element 3 and data conductor 4.T shape fixed mount 2 symmetries are located in the steel pipe 1, are rigidly connected between steel pipe 1 and the T shape fixed mount 2, and T shape fixed mount 2 is by forming as rigid plastic, metal rigidity material; The middle part of T shape fixed mount 2 is provided with sensitive element 3, sensitive element 3 is made by carbon fiber/black rubber compound substance, sensitive element 3 is provided with the data conductor 4 that links to each other with resistance meter through copper plate electrode, data connecting line 4 is made by plain conductor, realizes the test transmission of sensitive element resistance data.
Borehole wall deformation test method of the present invention: with the vertical deformation of the test borehole wall is example, at first bores a hole at least on an aspect of the test borehole wall, can bore 1～4 hole as required, and the external diameter of the steel pipe 1 of the diameter of boring and borehole wall deformation-sensor coincide; Borehole wall deformation-sensor is embedded in the borehole wall boring, and the direction that makes the T shape fixed mount 2 in the borehole wall deformation-sensor vertically upward, with the steel pipe 1 of sand-cement slurry filling borehole wall deformation-sensor and the space between the hole; Data conductor 4 is connected with signal picker, and the pressure-bearing variation along with the borehole wall spreads out of borehole wall pressure change signal by the sensitive elements 3 that are located in the T shape fixed mount 2, realizes the real-time monitoring of borehole wall distortion.According to the needs of test, realize strain testing to borehole wall different directions by the angle of controlling its installation.
Claims (2)
1. borehole wall deformation-sensor, it is characterized in that: it comprises that steel pipe (1), symmetry are located at the T shape fixed mount (2) in the steel pipe (1), the middle part of T shape fixed mount (2) is provided with the sensitive element (3) that is made by conductive rubber composite material, and sensitive element (3) is provided with the data conductor (4) that links to each other with resistance meter through copper plate electrode.
2. borehole wall deformation test method of sensor according to claim 1 is characterized in that may further comprise the steps:
A. at first bore a hole at least on an aspect of the test borehole wall, the external diameter of the steel pipe (1) of the diameter of boring and borehole wall deformation-sensor coincide;
B. select the setting angle of T shape fixed mount (2) according to required test request, borehole wall deformation-sensor is installed in the boring, with the steel pipe (1) of sand-cement slurry filling borehole wall deformation-sensor and the space between the hole;
C. data conductor (4) is connected with signal picker,, is located at the resistance value of the sensitive element (3) in the T shape fixed mount (2), can realize strain testing borehole wall different directions by collection along with the pressure-bearing of the borehole wall changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110079621 CN102183202A (en) | 2011-03-31 | 2011-03-31 | Borehole wall deformation sensor and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110079621 CN102183202A (en) | 2011-03-31 | 2011-03-31 | Borehole wall deformation sensor and test method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102183202A true CN102183202A (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110079621 Pending CN102183202A (en) | 2011-03-31 | 2011-03-31 | Borehole wall deformation sensor and test method thereof |
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| CN (1) | CN102183202A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721399A (en) * | 2012-06-02 | 2012-10-10 | 山东科技大学 | Wall-attached radial displacement micrometer for shaft and measuring method of radial displacement micrometer |
| CN104197890A (en) * | 2014-09-15 | 2014-12-10 | 中国矿业大学 | Device and method for measuring two-dimensional strain of well wall surface |
| CN106014402A (en) * | 2016-07-25 | 2016-10-12 | 西南石油大学 | Packing medium measuring instrument for well wall deformation detection |
| CN112683333A (en) * | 2020-12-29 | 2021-04-20 | 中煤建设集团有限公司 | Method for testing stress and deformation of inner wall of concrete vertical shaft well based on concrete conductivity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997010486A1 (en) * | 1995-09-15 | 1997-03-20 | Koivisto, Marja-Liisa | Sensing element for measuring loads |
| CN101482391A (en) * | 2009-01-19 | 2009-07-15 | 中国矿业大学 | Reinforced belt deformation test device and test method |
| CN101793020A (en) * | 2010-03-04 | 2010-08-04 | 中国矿业大学 | Geogrid strain testing device and testing method thereof |
-
2011
- 2011-03-31 CN CN 201110079621 patent/CN102183202A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997010486A1 (en) * | 1995-09-15 | 1997-03-20 | Koivisto, Marja-Liisa | Sensing element for measuring loads |
| CN101482391A (en) * | 2009-01-19 | 2009-07-15 | 中国矿业大学 | Reinforced belt deformation test device and test method |
| CN101793020A (en) * | 2010-03-04 | 2010-08-04 | 中国矿业大学 | Geogrid strain testing device and testing method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721399A (en) * | 2012-06-02 | 2012-10-10 | 山东科技大学 | Wall-attached radial displacement micrometer for shaft and measuring method of radial displacement micrometer |
| CN102721399B (en) * | 2012-06-02 | 2015-01-28 | 山东科技大学 | Wall-attached radial displacement micrometer for shaft and measuring method of radial displacement micrometer |
| CN104197890A (en) * | 2014-09-15 | 2014-12-10 | 中国矿业大学 | Device and method for measuring two-dimensional strain of well wall surface |
| CN104197890B (en) * | 2014-09-15 | 2016-12-07 | 中国矿业大学 | A kind of device and method measuring borehole wall surface Two-dimensional strain |
| CN106014402A (en) * | 2016-07-25 | 2016-10-12 | 西南石油大学 | Packing medium measuring instrument for well wall deformation detection |
| CN106014402B (en) * | 2016-07-25 | 2019-12-17 | 西南石油大学 | Filling medium measuring instrument for borehole wall deformation detection |
| CN112683333A (en) * | 2020-12-29 | 2021-04-20 | 中煤建设集团有限公司 | Method for testing stress and deformation of inner wall of concrete vertical shaft well based on concrete conductivity |
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Application publication date: 20110914 |