Particle shape based rock explosion breaking efficiency evaluation method

Abstract

The invention provides a particle shape based rock explosion breaking efficiency evaluation method. The method comprises that (1) explosion-broken stones at a plurality of positions of a blasting muckpile are shot in different scaling ratios; (2) an image processing technology is used to automatically identify the boundary of each explosion-broken stone so as to obtain the particle size and the major-minor axis ratio of each explosion-broken stone, and image identification results obtained at different positions and in different scaling ratios are combined; (3) acquiring particle size distribution and an average major-minor axis ratio of broken stones of the blasting muckpile based on an image processing result; and (4) an production efficiency index Q: Q = [1-(| G-Gs | / Gs)] * [1-(| S-0. 707 | / 0. 707)] of the explosion-broken stones is defined. According to the method, the degree that gradation of the produced explosion-broken stones satisfies standard requirements can be reflected, subsequent crushing and grinding efficiency of ores and the compactness of damming aggregates can be considered, and the economical efficiency of explosion-broken stone production can also be considered.

Description

technical field [0001] The invention belongs to the technical field of explosive crushing of rocks in mining and water conservancy and hydropower projects, and in particular relates to a method for evaluating the efficiency of explosive crushing of rocks based on particle shapes. Background technique [0002] Obtaining well-graded explosive crushed rock through explosive crushing of rocks is an important link in open-pit and underground mining and hydropower rockfill dam engineering aggregate acquisition. The corresponding explosive crushing effect has great influence on subsequent ore loading, transportation, crushing, processing and rockfilling. The overall stability of the dam, as well as the output of mineral products and the efficiency of the dam construction project have a direct impact (Kulatilake et al., 2010; Li Ruize et al., 2019). At present, the rock engineering field generally uses the particle size distribution (gradation) of blasted rocks to evaluate the blast...

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a method for evaluating the efficiency of rock explosion crushing based on particle shape, which solves the problem that the conventional method of evaluating the efficiency of explosive crushing based on particle size distribution cannot consider the particle shape of gravel, which is not conducive to the safety and economic benefits of mining and hydropower projects.