Particle shape based rock explosion breaking efficiency evaluation method

A technology of rock explosion and particle shape, which is applied in the field of rock explosion and crushing, which can solve the problems of unfavorable mining and hydropower project safety and economic benefits, and the inability to consider the shape of crushed stone particles, so as to achieve the effect of improving safety and economic benefits

Active Publication Date: 2019-11-22
SICHUAN UNIV
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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.

Method used

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Embodiment Construction

[0023] The technical solution of the present invention is described in conjunction with the embodiments.

[0024] (1) A rockfill dam project requires that the gradation envelope integral average value of the crushed stone aggregate in the dam body be G s , there are three alternative crushed stone aggregate blasting production design schemes, A, B, and C.

[0025] (2) Take high-definition photos of the bottom, middle, top, left and right sides of the rubble blast pile produced by the three blasting design schemes with magnifications of 1 times, 2 times, 5 times and 10 times respectively.

[0026] (3) Use the image processing software Split to automatically identify the boundaries of each blasted stone in all photos, and then obtain the particle size and long-short axis ratio of each blasted stone, and use the image recognition results obtained at different parts and different zoom scales Perform merge processing.

[0027] (4) The integral of the gravel gradation curve obtain...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N15/02
CPCG01N15/00G01N15/02G01N15/0227G01N2015/0294
Inventor 鲁功达杨兴国陶剑周家文李洪涛姚强
Owner SICHUAN UNIV
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