Statistical method of semi-porosity based on close-range photogrammetric technology

Abstract

The invention discloses a statistical method of a semi-porosity based on a close-range photogrammetric technology. The statistical method comprises the steps of performing quick non-contact measurement on the pre-splitting surface and the smooth blasting surface of a step after blasting to obtain the spatial three-dimensional information of the pre-splitting surface and the smooth blasting surface, and building a step-surface three-dimensional DEM model, dividing the hole marks of a pre-splitting hole and a smooth blasting hole by use of an image recognition technology and dividing the length of one half of each blast hole according to the unevenness of the hole marks on the pre-splitting surface and the smooth blasting surface, collecting the semi-hole information of all the blast holes, and calculating to obtain the semi-porosity for evaluating the blasting effect. The statistical method of the semi-porosity based on the close-range photogrammetric technology is capable of greatly improving the statistical accuracy of the semi-porosity, reducing the statistical error and reducing the operation cost; the digital close-range photogrammetric technology is adopted so that more complete information of the pre-splitting surface and the smooth blasting surface can be obtained and the information of a blasting region can be stored conveniently, and meanwhile, the reliability of evaluation on the pre-splitting and smooth blasting effects also can be improved.

Description

technical field [0001] The invention relates to a semi-porosity statistical method based on close-range photogrammetry technology, which is suitable for evaluating the effect of pre-splitting blasting and smooth blasting in the fields of mining, water conservancy and hydropower, transportation and other geotechnical engineering fields. Background technique [0002] In step blasting, pre-splitting blasting and smooth blasting play a very important role in the excavation of key parts. Among them, the half porosity is a very important index to evaluate the effect of pre-splitting blasting and smooth blasting. [0003] In terms of statistics of semi-porosity data, the traditional means are artificial leather tape measurement and manual calculation, which have many shortcomings in engineering applications, such as large errors, low precision, dangerous working environment and low efficiency, and the reliability of the measured data is low. , not enough to comprehensively evaluat...

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Problems solved by technology

[0003] In terms of statistical semi-porosity data, the traditional means are manual leather tape measurement and manual calculation, which have many shortcomings in engineering applications, such as large errors, low precision, dangerous working environment and low efficiency, and the reliability of the measured data is low. , not enough to comprehensively evaluate the effect of pre-splitting blasting and smooth blasting

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