CN104217199B - A kind of Half cast factor statistical method based on close-shot photography measure technique - Google Patents
A kind of Half cast factor statistical method based on close-shot photography measure technique Download PDFInfo
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- CN104217199B CN104217199B CN201410467656.4A CN201410467656A CN104217199B CN 104217199 B CN104217199 B CN 104217199B CN 201410467656 A CN201410467656 A CN 201410467656A CN 104217199 B CN104217199 B CN 104217199B
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Abstract
The invention discloses a kind of Half cast factor statistical method based on close-shot photography measure technique, fast speed non-contact measurement is carried out to the pre- broken face of quick-fried backward step and the quick-fried face of light using up short technology, pre- broken face and the quick-fried space of planes three-dimensional information of light are obtained, step surface three-dimensional DEM models are set up.By image recognition technology, the hole trace of pre- ceasma and light blast hole is divided, and the length of each blasthole half bore is divided according to irregularity degree of the hole trace on pre- broken face and the quick-fried face of light.The half bore information of all blastholes is counted, the Half cast factor for evaluating this demolition effect is calculated.Advantage is：The present invention can be greatly enhanced the statistical accuracy of Half cast factor, reduce statistical error, reduce operating cost；Using digital close range photogrammetry technology, more complete pre- broken face and the quick-fried face information of light can be obtained, is conducive to the storage of quick-fried area's information, while the reliability that presplitting and smooth demolition effect are evaluated can also be improved.
Description
Technical field
The present invention relates to a kind of Half cast factor statistical method based on close-shot photography measure technique, it is adaptable to digs up mine, water conservancy water
The presplit blasting in the Geotechnical Engineering such as electricity, traffic field and evaluation of smooth blasting results.
Background technology
In bench blasting, presplit blasting and photoface exploision play very important effect for the excavation of key position.
Wherein Half cast factor is a very important index for evaluating presplit blasting and Smooth Blasting Effects.
In terms of Half cast factor data is counted, traditional means are artificial skin's tape measure, manual calculation, and this is in engineer applied
In exist that error is big, precision is low, operating environment is dangerous and the low shortcomings of efficiency, the data reliability of measurement is relatively low,
It is not enough to thoroughly evaluating presplit blasting and Smooth Blasting Effects.
The content of the invention
It is an object of the invention to provide a kind of Half cast factor statistical method based on close-shot photography measure technique, measurement is improved
As a result precision and the reliability of appraisement system, it is possible to achieve considerable economic benefit and social benefit.
The principle of the present invention is：Quickly non-connect is carried out to the pre- broken face of quick-fried backward step and the quick-fried face of light using up short technology
Measurement is touched, pre- broken face and the quick-fried space of planes three-dimensional information of light is obtained, sets up step surface three-dimensional DEM models.By image recognition technology,
The hole trace of pre- ceasma and light blast hole is divided, and each big gun is divided according to irregularity degree of the hole trace on pre- broken face and the quick-fried face of light
The length of hole half bore.The half bore information of all blastholes is counted, the Half cast factor for evaluating this demolition effect is calculated.
A kind of Half cast factor statistical method based on close-shot photography measure technique, comprises the following steps：
（1）3~4 control points are laid in photographed region, and measure using survey station basic point and total powerstation the coordinate at control point, shape
Into control point coordinate file；
（2）The photo in the pre- quick-fried face of broken face or light after quick-fried is shot from different angles, is entered using digital photogrammetry software
Row obtains the digital complex demodulation for shooting area and its adjacent domain as the foundation of thing relational model, divides pre- broken face or light is quick-fried
Face scope of statistics；
（3）By image recognition technology, on digital complex demodulation, each pre- ceasma or light blast hole is identified
Kong Hen, and count the length of each blasthole；
（4）According to the three-dimensional point coordinate of the empty trace of each half bore, the space line of quick-fried each blasthole of area is calculated, is counted
The convex-concave degree of the pre- quick-fried face blasthole region of broken face or light；
（5）Each section of half complete hole length of statistics, is added up, obtains half all hole length L1, L1With blasthole overall length
Spend L0Ratio, for the Half cast factor in the region.
The pre- broken face of statistics or the convex-concave degree of the quick-fried face blasthole region of light, refer to by each blasthole point
Three-dimensional coordinate, calculate and the straight line space length D；When this is less than the threshold value of setting apart from D, then it is assumed that half bore has been at this
Whole；When this is more than the threshold value of setting apart from D, then it is assumed that half bore is incomplete at this.
The advantage of the Half cast factor statistical method based on close-shot photography measure technique of the invention is：
1st, the present invention can change in Half cast factor measurement process based on artificial, labor intensity is big, security is low, efficiency
Low situation；
2nd, the present invention can be greatly enhanced the statistical accuracy of Half cast factor, reduce statistical error, reduce operating cost；
3. using digital close range photogrammetry technology, more complete pre- broken face and the quick-fried face information of light can be obtained, favorably
In the storage of quick-fried area's information, while the reliability that presplitting and smooth demolition effect are evaluated can also be improved.
Brief description of the drawings
Fig. 1 is control point and camera position floor plan.
Fig. 2 is pre- broken face half bore schematic diagram.
In figure, 1 is Blasting Excavation region；2 be control point；3 be excavation boundary line；4 be camera；5 be photographic base；6 are
Distance of the photographic base to bench floor；7 be photo tomography projection light；8 be complete half bore；9 be incomplete half bore.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is further described.As shown in Figure 1 and Figure 2, some hydropower station builds slope blasting
Excavate, design presplitting hole depth 10m, aperture 70mm.A kind of Half cast factor statistical method based on close-shot photography measure technique, including
Following steps：
（1）The loosening sillar on the pre- broken face is rinsed well using giant, complete pre- broken face basement rock is left；
（2）Control point is arranged on the pre- broken face basement rock and its adjacent domain, 3 control points are only needed in theory,
The control point of more than 4 is often laid in practical operation to reduce the error of DEM models（Control point is more, and images match is more held
Easily, the DEM of generation error is also just smaller）；Can be prominent stone or with paint for the selection at control point
Etc. the measuring point of mark；
（3）Using total powerstation and survey station basic point, measurement control point coordinates, and form control point coordinate file；
（4）The photo pair of the pre- broken face is treated away from shooting to focus from different angles；Phase used in close-range photogrammetry
Machine can be that measurement camera can also be non-metric camera（Camera needs to carry out distortion correction）.It must be protected during shooting
Demonstrate,prove camera focus constant, twice the line of shooting point（Photographic base）Preferably with pre- broken face close to parallel, the distance of two shooting points
Should not be too remote, to ensure that left and right photo has larger registration.
（5）Using digital photogrammetry software to photo to carrying out relative orientation, absolute orientation, generation core line, image
With being operated with matching result editor etc., the DEM models for treating step excavation face and its adjacent domain are ultimately generated（When the visual field of camera
When limited, it can be shot with subregion, the DEM single modes for finally generating each group splice integral DEM models）；
（6）Pre- broken face scope is divided on DEM models using program, and each big gun is identified using image recognition technology
The hole trace line in hole, counts the length of each blasthole；
（7）By three-dimensional point coordinate in program and blasthole, the three dimensions linear function of each blasthole in quick-fried area is calculated.System
Count the convex-concave degree of hole trace on pre- broken face, i.e., by the three-dimensional coordinate that each is put, the space length D of calculating and the straight line.Take
Threshold value D0=20mm, when D is less than design threshold D0When, it is believed that half bore is complete at this；When D is more than design threshold D0When, it is believed that
Half bore is incomplete at this；
（8）According to the coordinate of half bore complete segment, the length of each section of complete half bore is counted, and is included in statistics, is deposited
Enter database.
（9）According to the data finally counted, the Half cast factor of all blastholes in the region can be obtained（Half cumulative hole length
L1/ blasthole length the L added up0）, it is also possible to obtain the Half cast factor of each blasthole（Half hole length L of the blastholen1The length of/blasthole
Spend Ln）, to obtain more accurate statistics.
（10）Presplitting face image data, DEM data and Half cast factor statistics are stored in database, used with for future reference.
Claims (2)
1. a kind of Half cast factor statistical method based on close-shot photography measure technique, it is characterised in that comprise the following steps：
（1）3~4 control points are laid in photographed region, and the coordinate at control point is measured using survey station basic point and total powerstation, control is formed
Point coordinates file processed；
（2）The photo in the pre- quick-fried face of broken face or light after quick-fried is shot from different angles, and picture is carried out using digital photogrammetry software
The foundation of thing relational model, obtains the digital elevation model for shooting area and its adjacent domain, divides pre- broken face or the quick-fried face statistics of light
Scope；
（3）By image recognition technology, on digital elevation model, the hole trace of each pre- ceasma or light blast hole is identified, and
Count the length of each blasthole；
（4）According to the three-dimensional point coordinate of the empty trace of each half bore, the space line of quick-fried each blasthole of area is calculated, presplitting is counted
Face or the convex-concave degree of the quick-fried face blasthole region of light；
（5）Each section of half complete hole length of statistics, is added up, obtains half all hole length L1, L1With blasthole total length L0
Ratio, for the Half cast factor in the region.
2. the Half cast factor statistical method as claimed in claim 1 based on close-shot photography measure technique, it is characterised in that the system
The convex-concave degree of pre- broken face or the quick-fried face blasthole region of light is counted, refers to the three-dimensional coordinate by each blasthole point, is counted
Calculation and the space length D of the straight line；When this is less than the threshold value of setting apart from D, then it is assumed that half bore is complete at this；When the distance
D is more than the threshold value of setting, then it is assumed that half bore is incomplete at this.
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| CN107644119B (en) * | 2017-08-15 | 2020-08-04 | 四川大学 | Automatic half-porosity calculation method based on three-dimensional scanning point cloud |
| CN109269479A (en) * | 2018-09-04 | 2019-01-25 | 中科海慧（北京）科技有限公司 | Ancient building safety monitoring method based on spatial digitizer acquisition image |
| CN114186645B (en) * | 2022-02-15 | 2022-04-26 | 中国长江三峡集团有限公司 | Blasting half-porosity detection method and device, electronic equipment and storage medium |
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| DE202012104890U1 (en) * | 2012-12-14 | 2013-03-05 | Faro Technologies, Inc. | Device for optically scanning and measuring an environment |
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| JP2006329842A (en) * | 2005-05-27 | 2006-12-07 | Konica Minolta Sensing Inc | Method and device for aligning three-dimensional shape data |
| CN102798412A (en) * | 2012-07-31 | 2012-11-28 | 同济大学 | Method for evaluating construction quality of tunnel drilling and blasting based on three-dimensional laser scanning |
| CN102937397A (en) * | 2012-11-27 | 2013-02-20 | 武汉大学 | Step blasting dynamic design method based on close-range photogrammetry technology |
| CN102997765A (en) * | 2012-12-31 | 2013-03-27 | 广东宏大爆破股份有限公司 | Device and method of utilizing detonating pipes to buffer millisecond detonation damping |
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