CN102680327A - Detection method and detection station for tail deformation of anchor rod - Google Patents
Detection method and detection station for tail deformation of anchor rod Download PDFInfo
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- CN102680327A CN102680327A CN2012101394938A CN201210139493A CN102680327A CN 102680327 A CN102680327 A CN 102680327A CN 2012101394938 A CN2012101394938 A CN 2012101394938A CN 201210139493 A CN201210139493 A CN 201210139493A CN 102680327 A CN102680327 A CN 102680327A
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- anchor pole
- hole
- dynamometry
- steel band
- afterbody
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Abstract
The invention relates to a coal mining protection technology and discloses a detection method and a detection station for the tail deformation of an anchor rod. The detection method comprises the following steps of: attaching a force measuring steel strip to the upper surface of the detection station; mounting the anchor rod of which the tail is provided with threads in a first through hole in the inclined plane of a groove and a second through hole of the force measuring steel strip through the groove arranged in the upper surface of the detection station; mounting a force measuring support plate at the tail of the anchor rod and screwing and fixing the force measuring support plate by using an anchor rod nut; sticking a plurality of first strain gauges in the axial direction of the tail of the anchor rod; gradually applying the torque on the anchor rod nut by adopting a torque wrench; meanwhile, reading each stage of torque from the torque wrench; and reading numbers of the first strain gauges by adopting a digital receiver. According to detection method and the detection station disclosed by the invention, the stress state of the tail of the anchor rod can be read in real time through the first strain gauges; and meanwhile, the deformation process of the anchor rod tail can be observed. The detection method provides a reference for the support design of the anchor rod for a coal underground lane so as to improve the support effect of the anchor rod.
Description
Technical field
The present invention relates to coal mining guard technology field, particularly relate to a kind of anchor pole afterbody deformation detection method and monitor station that is used under the coal mine.
Background technology
Bolt supporting is as a kind of economy, effective roadway support technology; Not only can improve the roadway support effect; Reduce the roadway support cost; And help the quick propelling of coal-face and the raising of coal production, become China's coal-mine and other mine working first-selected, main support pattern safely and efficiently.
The anchor pole afterbody comprises spiral thread on anchor bolt section, supporting plate, spherical washer, plastic washer and nut.The anchor pole afterbody mainly contains following effect: the first through fastening nut, compress supporting plate and apply prestress to anchor pole; Protect the table member through supporting plate and steel band etc., anchor rod prestress is diffused in the country rock, thereby improve the surrouding rock stress state, suppress opening of surrounding rock separation layer, structural plane slip and joint fissure, realize active, the immediate support effect of anchor pole; It two is that surrouding rock deformation makes loading on supporting plate, transfers loads to anchor rod body through supporting plate, increases the working resistance of anchor pole, gives full play to the effect of anchor pole control surrouding rock deformation.For end anchorage and lengthening anchoring rod, the destruction of afterbody will cause whole anchor pole to lose efficacy; For the full length fastening anchor pole, the mechanical property of afterbody is also very big to the influence of bolt supporting effect.
Generally speaking, design anchor pole vertical working surface arrangement.But because there is certain deviation in construction, and the surface, tunnel is uneven mostly, causes in underworkings, and anchor pole is difficult to fully vertical with the surface, has certain inclination angle.In addition, for control structure facial disfigurement, tunnel pucking etc., specialized designs anchor pole and surface, tunnel are at an angle sometimes.When anchor pole axis and surface, tunnel out of plumb, in the time of at an angle, following problem can appear in the anchor pole afterbody: supporting plate, spherical washer and nut receive unbalance loading in installation and duty, and stress worsens; In the anchor pole installation process, prestress applies weak effect, and it is low that nut torque converts prestressed efficient to, and the scope that anchor rod prestress is diffused in the country rock is little; The anchor pole afterbody not only receives stretching action, and receives bending, shear action, and the anchor pole afterbody takes place under far below the situation of its stretch breaking strength disrumpent feelings, causes bolt supporting to be lost efficacy.
Summary of the invention
The technical matters that (one) will solve
The technical matters that the present invention will solve is how a kind of distortion of anchor pole afterbody and stressed detection method and monitor station are provided.
(2) technical scheme
In order to solve the problems of the technologies described above; The present invention provides a kind of anchor pole afterbody deformation detection method; Comprise: the upper surface of S1, dynamometry steel band and monitor station fits and the groove of the upper surface through said monitor station; Adopt the steel band stationary installation that the dynamometry steel band is fixed on the said monitor station, on the inclined-plane of said groove, have first through hole, said dynamometry steel band and the relative position of said first through hole have second through hole; S2, the screwed anchor pole of an afterbody is installed in said first through hole and second through hole; The anchor pole afterbody axially on paste a plurality of first foil gauges; Said a plurality of first foil gauge is connected with the digital received appearance, and the dynamometry supporting plate is installed and is adopted anchor nut to tighten fixing on said anchor pole afterbody; S3, employing dial torque wrench apply moment of torsion step by step to anchor nut; Read every grade moment of torsion simultaneously from dial torque wrench; Adopt the digital received appearance to read the numeral of first foil gauge, and measure the angle variation of anchor pole afterbody, and the relative slippage of measuring dynamometry supporting plate and dynamometry steel band; S4, when the arbitrary generation fracture of dynamometry steel band or dynamometry supporting plate or anchor pole afterbody, dial torque wrench stops anchor nut being applied moment of torsion.
Wherein, adopt the upper surface of suppressing said dynamometry steel band and said monitor station to compress applying and suppress said groove.
Wherein, the inclination angle on said inclined-plane is 5～30 °.
Wherein, said step S2 also comprises: be pasted with second foil gauge that is connected with said digital received appearance in the position that said dynamometry steel band is positioned at said second through hole; Said step S3 also comprises: adopt the digital received appearance to read the numeral of second foil gauge.
Wherein, said step S2 also comprises: paste at the upper surface of said dynamometry supporting plate and be connected with said digital received appearance; Said step S3 also comprises: adopt the digital received appearance to read the numeral of the 3rd foil gauge.
The present invention also provides a kind of anchor pole afterbody deformation detection platform; Comprise that dynamometry steel band, dynamometry supporting plate, steel band stationary installation, anchor nut, digital received appearance and upper surface have the monitor station of groove; The upper surface of said dynamometry steel band and said monitor station fits and through said groove, said dynamometry steel band adopts the steel band stationary installation to be fixed on the said monitor station; The position that said dynamometry steel band is positioned at the inclined-plane of said groove has second through hole; Said monitor station and the relative position of said second through hole have first through hole; The screwed anchor pole of afterbody is installed in first through hole and second through hole; The anchor pole afterbody drops on the top of said dynamometry steel band, and said dynamometry supporting plate is installed on the said anchor pole afterbody, and adopts anchor nut to tighten fixing; Said anchor pole afterbody axially on be stained with a plurality of first foil gauges, said first foil gauge is connected with said digital received appearance.
Wherein, the position that said dynamometry steel band is positioned at said second through hole is stained with second foil gauge, and said second foil gauge is connected with said digital received appearance.
Wherein, the upper surface of said dynamometry supporting plate is stained with the 3rd foil gauge, and said the 3rd foil gauge is connected with said digital received appearance.
Wherein, Said steel band stationary installation comprises hold-down nut, fixedly supporting plate and the threaded fixed bar of afterbody; The dynamometry steel band that is positioned on the surface level of said monitor station has the third through-hole that is complementary with said fixed bar; The position that said monitor station is relative with said third through-hole has fourth hole, and said fixed bar is installed on said third through-hole and the fourth hole, and the fixed bar afterbody drops on the top of said third through-hole; On said fixed bar afterbody, install and fix supporting plate, and adopt hold-down nut to tighten fixing.
Wherein, the inclination angle on said inclined-plane is 5～30 °.
(3) beneficial effect
A kind of anchor pole afterbody deformation detection method and monitor station that technique scheme provides; The anchor pole afterbody is installed on the inclined-plane of groove of monitor station; And adopt dynamometry supporting plate and anchor nut to fix; The anchor pole afterbody axially on be stained with first foil gauge that is connected with the digital received appearance, can read the stress of anchor pole afterbody, the deformation process that can observe the anchor pole afterbody simultaneously in real time through first foil gauge; The Design of bolt support that this detection method is used for the colliery underworkings provides foundation, to improve the supporting effect of anchor pole.
Description of drawings
Fig. 1 is the structural representation of a kind of anchor pole afterbody of the present invention deformation detection platform;
Fig. 2 is the vertical view of a kind of anchor pole afterbody of the present invention deformation detection platform;
Fig. 3 is the enlarged drawing of R among Fig. 1.
Wherein, 1, monitor station; 1a, inclined-plane; 1b, first through hole; 2, dynamometry steel band; 2a, second through hole; 3, dynamometry supporting plate; 4, steel band stationary installation; 4a, hold-down nut; 4b, fixing supporting plate; 4c, fixed bar; 4d, fixed bar afterbody; 5, anchor pole; 5a, anchor pole afterbody; 6, first foil gauge; 7a, first packing ring; 7b, second packing ring; 8, anchor nut.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Like Fig. 1 and Fig. 3; A kind of anchor pole afterbody of the present invention deformation detection method; Comprise: the upper surface of S1, dynamometry steel band 2 and monitor station 1 fits and the groove (this monitor station upper surface with groove is surperficial for the simulation tunnel) of the upper surface through this monitor station 1; Adopt steel band stationary installation 4 that dynamometry steel band 2 is fixed on this monitor station 1, on the inclined-plane of groove 1a, have the first through hole 1b, dynamometry steel band 3 and the relative position of the first through hole 1b have the second through hole 2a; S2, the screwed anchor pole 5 of an afterbody is installed in the first through hole 1b and the second through hole 2a; Paste a plurality of first foil gauges 6 axially going up of anchor pole afterbody 5a (this anchor pole afterbody 5a is the thread segment of anchor pole 5 afterbodys); A plurality of first foil gauges 6 are connected with the digital received appearance, dynamometry supporting plate 3 are installed and are adopted anchor nut 8 to tighten fixing on anchor pole afterbody 5a; S3, employing dial torque wrench apply moment of torsion step by step to anchor nut 8; Read every grade moment of torsion simultaneously from dial torque wrench; Adopt the digital received appearance to read the numeral of first foil gauge 6, and measure the angle variation of anchor pole afterbody 5a, and the relative slippage of measuring dynamometry supporting plate 3 and dynamometry steel band 2; S4, when the arbitrary generation fracture of dynamometry steel band 2 or dynamometry supporting plate 3 or anchor pole afterbody 5a, dial torque wrench stops anchor nut 8 is applied moment of torsion.Wherein, groove can be the groove that V-arrangement etc. has the inclined-plane.The concrete mounting means of first foil gauge 6 is: upwards having four road foil gauge mounting grooves the week of anchor pole afterbody 5a, and per pass foil gauge mounting groove axially on paste multi-disc first foil gauge 6.This detection method makes: the anchor pole afterbody 5a that is on the inclined-plane 1a receives compound stress under the torsional interaction that dial torque wrench applies; This compound stress makes anchor pole afterbody 5a, dynamometry supporting plate 3 and dynamometry steel band 2 be out of shape, and the torsion on anchor pole afterbody 5a not only receives axially also receives shear stress; This compound stress makes anchor pole afterbody 5a crooked; Can read the stress of anchor pole afterbody 5a in real time through first foil gauge, the deformation process that can observe anchor pole afterbody 5a simultaneously, and can be according to the data curve plotting of the data that read; The Design of bolt support of using for the colliery underworkings provides foundation, to improve the supporting effect of anchor pole.
Preferably, in order to strengthen the applying effect of dynamometry steel band 2 and monitor station 1, present embodiment adopts the upper surface of suppressing dynamometry steel band 2 and monitor station 1 to compress applying, suppresses groove simultaneously.Inclined-plane 1a is used to simulate the setting angle of the surperficial uneven and anchor pole afterbody of colliery underworkings, and its inclination angle is 5～30 °.The length of monitor station 1 is not less than 1200mm, highly is not less than 1200mm, and thickness is not less than 150mm; The groove of monitor station 1 can be made into the warpage symmetric mode, and the inclination angle of inclined-plane 1a can be 5 °, and 10 °, 15 °, 20 °, 25 °, 30 °; Detect for ease; As shown in Figure 1; On two inclined-plane 1a of symmetry; The second through hole 2a and the corresponding first through hole 1b can be set to two of symmetry respectively, and the two ends of dynamometry steel band 2 distribute and adopt one group of steel band stationary installation to fix, and this structure that is symmetrical distribution can be designed to many groups and detect simultaneously.
Further, for the strain and the distortion of measuring the dynamometry steel band simultaneously, present embodiment also comprises at step S2: second foil gauge that is connected with said digital received appearance is pasted in the position that is positioned at said second through hole at said dynamometry steel band; Said step S3 also comprises: adopt the digital received appearance to read the numeral of second foil gauge.Further, for the strain and the distortion of measuring the dynamometry supporting plate simultaneously, present embodiment also comprises at step S2: paste at the upper surface of said dynamometry supporting plate and be connected with said digital received appearance; Said step S3 also comprises: adopt the digital received appearance to read the numeral of the 3rd foil gauge.
Like Fig. 1, Fig. 2 and Fig. 3; A kind of anchor pole afterbody deformation detection platform provided by the invention; Comprise that dynamometry steel band 2, dynamometry supporting plate 3, steel band stationary installation 4, anchor nut 8, digital received appearance and upper surface have the monitor station 1 of groove; The upper surface of dynamometry steel band 2 and monitor station 1 fits and through said groove, dynamometry steel band 2 adopts steel band stationary installations 4 to be fixed on the monitor station 1; The position that dynamometry steel band 2 is positioned at the inclined-plane 1a of groove has the second through hole 2a; Monitor station 1 and the relative position of the second through hole 2a have the first through hole 1b; The screwed anchor pole 5 of afterbody is installed in the second through hole 2a and the first through hole 1b; Anchor pole afterbody 5a drops on the top of dynamometry steel band 2, and dynamometry supporting plate 3 is installed on the anchor pole afterbody 5a, and adopts anchor nut 8 to tighten fixing; Anchor pole afterbody 5a axially on be stained with a plurality of first foil gauges 6, this first foil gauge 6 is connected with the digital received appearance.
Inclined-plane 1a is used to simulate the setting angle of the surperficial uneven and anchor pole afterbody of colliery underworkings, and its inclination angle is 5～30 °.Preferably, the length of monitor station 1 is not less than 1200mm, highly is not less than 1200mm, and thickness is not less than 150mm.
Further, in order to reduce the rigidity friction between anchor nut 4 and the dynamometry supporting plate 3,, be provided with the first packing ring 7a between the anchor nut 4 of present embodiment and the dynamometry supporting plate 3 to reduce adverse effect to testing result.Preferably, the middle part of dynamometry supporting plate 3 is provided with arc boss, and the first packing ring 7a is the semisphere rubber washer to recessed song, and what can make anchor pole afterbody 5a and monitor station 1 vertical direction is connected more firm.
Further, for the strain and the distortion of measuring the dynamometry steel band simultaneously, present embodiment is stained with second foil gauge in the position that dynamometry steel band 2 is positioned at the second through hole 2a, and this second foil gauge is connected with the digital received appearance.Further, in order to measure strain and the distortion on the dynamometry supporting plate simultaneously, present embodiment is stained with the 3rd foil gauge at the upper surface of dynamometry supporting plate 3, and the 3rd foil gauge is connected with the digital received appearance.
Preferably; The steel band stationary installation 4 of present embodiment comprises hold-down nut 4a, fixedly supporting plate 4b and the threaded fixed bar 4c of afterbody; The dynamometry steel band 2 that is positioned on the surface level of monitor station 1 has the third through-hole that is complementary with fixed bar 4c; Monitor station 1 position relative with third through-hole has fourth hole, and fixed bar 4c is installed on third through-hole and the fourth hole, and fixed bar afterbody 4d drops on the top of third through-hole; On fixed bar afterbody 4d, install and fix supporting plate 4b, and adopt hold-down nut 4a to tighten fixing.
Fig. 2 is the vertical view of a kind of anchor pole afterbody of the present invention deformation detection platform, not skyhook nut 8 and hold-down nut 4a among the figure.
Further, in order to reduce hold-down nut 4a and the fixedly rigidity friction between the supporting plate 4b, reducing adverse effect to testing result, the hold-down nut 4a of present embodiment and fixedly be provided with the second packing ring 7b between the supporting plate 4b.Fixedly the middle part of supporting plate 4b is provided with arc boss, and the second packing ring 7b is the semisphere rubber washer to recessed song, and what can make dynamometry steel band 2 and monitor station 1 vertical direction is connected more firm.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (10)
1. an anchor pole afterbody deformation detection method is characterized in that, comprising:
The upper surface of S1, dynamometry steel band and monitor station fits and the groove of the upper surface through said monitor station; Adopt the steel band stationary installation that the dynamometry steel band is fixed on the said monitor station; On the inclined-plane of said groove, have first through hole, said dynamometry steel band and the relative position of said first through hole have second through hole;
S2, the screwed anchor pole of an afterbody is installed in said first through hole and second through hole; The anchor pole afterbody axially on paste a plurality of first foil gauges; Said a plurality of first foil gauge is connected with the digital received appearance, and the dynamometry supporting plate is installed and is adopted anchor nut to tighten fixing on said anchor pole afterbody;
S3, employing dial torque wrench apply moment of torsion step by step to anchor nut; Read every grade moment of torsion simultaneously from dial torque wrench; Adopt the digital received appearance to read the numeral of first foil gauge, and measure the angle variation of anchor pole afterbody, and the relative slippage of measuring dynamometry supporting plate and dynamometry steel band;
S4, when the arbitrary generation fracture of dynamometry steel band or dynamometry supporting plate or anchor pole afterbody, dial torque wrench stops anchor nut being applied moment of torsion.
2. anchor pole afterbody deformation detection method as claimed in claim 1 is characterized in that, adopts the upper surface of suppressing said dynamometry steel band and said monitor station to compress applying and suppress said groove.
3. anchor pole afterbody deformation detection method as claimed in claim 1 is characterized in that the inclination angle on said inclined-plane is 5～30 °.
4. anchor pole afterbody deformation detection method as claimed in claim 1 is characterized in that said step S2 also comprises: be pasted with second foil gauge that is connected with said digital received appearance in the position that said dynamometry steel band is positioned at said second through hole; Said step S3 also comprises: adopt the digital received appearance to read the numeral of second foil gauge.
5. anchor pole afterbody deformation detection method as claimed in claim 1 is characterized in that said step S2 also comprises: paste at the upper surface of said dynamometry supporting plate and be connected with said digital received appearance; Said step S3 also comprises: adopt the digital received appearance to read the numeral of the 3rd foil gauge.
6. anchor pole afterbody deformation detection platform; It is characterized in that; Comprise that dynamometry steel band, dynamometry supporting plate, steel band stationary installation, anchor nut, digital received appearance and upper surface have the monitor station of groove; The upper surface of said dynamometry steel band and said monitor station fits and through said groove, said dynamometry steel band adopts the steel band stationary installation to be fixed on the said monitor station; The position that said dynamometry steel band is positioned at the inclined-plane of said groove has second through hole; Said monitor station and the relative position of said second through hole have first through hole; The screwed anchor pole of afterbody is installed in first through hole and second through hole; The anchor pole afterbody drops on the top of said dynamometry steel band, and said dynamometry supporting plate is installed on the said anchor pole afterbody, and adopts anchor nut to tighten fixing; Said anchor pole afterbody axially on be stained with a plurality of first foil gauges, said first foil gauge is connected with said digital received appearance.
7. anchor pole afterbody deformation detection platform as claimed in claim 6 is characterized in that the position that said dynamometry steel band is positioned at said second through hole is stained with second foil gauge, and said second foil gauge is connected with said digital received appearance.
8. anchor pole afterbody deformation detection platform as claimed in claim 6 is characterized in that the upper surface of said dynamometry supporting plate is stained with the 3rd foil gauge, and said the 3rd foil gauge is connected with said digital received appearance.
9. anchor pole afterbody deformation detection platform as claimed in claim 6; It is characterized in that; Said steel band stationary installation comprises hold-down nut, fixedly supporting plate and the threaded fixed bar of afterbody, and the dynamometry steel band that is positioned on the surface level of said monitor station has the third through-hole that is complementary with said fixed bar, and the position that said monitor station is relative with said third through-hole has fourth hole; Said fixed bar is installed on said third through-hole and the fourth hole; The fixed bar afterbody drops on the top of said third through-hole, on said fixed bar afterbody, installs and fixes supporting plate, and adopts hold-down nut to tighten fixing.
10. anchor pole afterbody deformation detection platform as claimed in claim 6 is characterized in that the inclination angle on said inclined-plane is 5～30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210139493.8A CN102680327B (en) | 2012-05-07 | 2012-05-07 | Detection method and detection station for tail deformation of anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210139493.8A CN102680327B (en) | 2012-05-07 | 2012-05-07 | Detection method and detection station for tail deformation of anchor rod |
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| Publication Number | Publication Date |
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| CN102680327A true CN102680327A (en) | 2012-09-19 |
| CN102680327B CN102680327B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210139493.8A Expired - Fee Related CN102680327B (en) | 2012-05-07 | 2012-05-07 | Detection method and detection station for tail deformation of anchor rod |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5734432A (en) * | 1980-08-12 | 1982-02-24 | Hitachi Cable Ltd | Torsion test of cable |
| CN1963459A (en) * | 2006-10-31 | 2007-05-16 | 中国矿业大学 | Random lossless dynamical testing apparatus and method for anchor arm and anchoring |
| CN101949294A (en) * | 2010-08-13 | 2011-01-19 | 山西潞安环保能源开发股份有限公司常村煤矿 | Prestressed full-length anchorage support method |
| CN101963555A (en) * | 2010-08-19 | 2011-02-02 | 天地科技股份有限公司 | Anchor rod or anchor rope support stress test method and device |
| CN102279135A (en) * | 2011-07-06 | 2011-12-14 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
-
2012
- 2012-05-07 CN CN201210139493.8A patent/CN102680327B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5734432A (en) * | 1980-08-12 | 1982-02-24 | Hitachi Cable Ltd | Torsion test of cable |
| CN1963459A (en) * | 2006-10-31 | 2007-05-16 | 中国矿业大学 | Random lossless dynamical testing apparatus and method for anchor arm and anchoring |
| CN101949294A (en) * | 2010-08-13 | 2011-01-19 | 山西潞安环保能源开发股份有限公司常村煤矿 | Prestressed full-length anchorage support method |
| CN101963555A (en) * | 2010-08-19 | 2011-02-02 | 天地科技股份有限公司 | Anchor rod or anchor rope support stress test method and device |
| CN102279135A (en) * | 2011-07-06 | 2011-12-14 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
Non-Patent Citations (1)
| Title |
|---|
| 康红普 等: "锚杆支护组合构建的力学性能与支护效果分析", 《煤炭学报》, vol. 35, no. 7, 31 July 2010 (2010-07-31), pages 1057 - 1065 * |
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