Ore rock blasting classification method based on fractal theory

Abstract

The invention discloses an ore rock blasting classification method based on the fractal theory. The method includes the steps that the fractal dimension of rock mass joints is obtained through the fractal theory; specific factors influencing ore rock blastability are analyzed through the theory of blasting and mechanism, the wave impedance, tensile strength, compressive strength, (rock mass joint) fractal dimensions are selected to serve as criterion indexes of blasting classification on this basis, the rock blastability is divided into seven classes, and the weight coefficients of all the indexes are determined; and at last, the extension theory is combined with rock mass blasting evaluation, the diversity and complexity of rock mass blastability influence factors are considered, the parameters capable of reflecting the rock mass integration engineering characteristic are selected from the aspect of practical engineering for evaluation, and a rock mass blasting classification matter-element model is established on the basis of the matter-element theory, extension set theory and correlation function calculation. The joint fissure fractal dimension is used as the rock mass blasting classification index, the geologic features of rock mass are known from the macroscopic scale, and the rock mass integrity can achieve quantitative description. Practical application results show that using the rock mass joint quantitative description as the blasting evaluation index is reliable and effective. The method is of important practical significance to improving the blasting effect and reducing the blasting cost.

Description

technical field [0001] The invention belongs to the field of metal mining and provides technical support for mining blasting operations. Background technique [0002] With the development of social economy, blasting engineering technology occupies an increasingly important position in the socialist modernization drive. Rock is the basic material condition for the survival and development of human beings. People's basic necessities of life are inseparable from rocks, and the raw materials, energy and materials of modern production are all obtained from rocks. Technology in the rock mining industry has changed dramatically, but blasting has always been an effective means of breaking rock. Especially in the process of mine production, a large amount of rock needs to be broken, and the main method of breaking is to use blasting technology. It can be said that the cost of blasting accounts for a very high proportion of the cost of the entire geotechnical project. The amount of...

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Problems solved by technology

In addition, blasting operation is a high-risk job, and unreasonable blasting design will often cause very dangerous adverse consequences such as over-blasting and blasting rejection.

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