A method for calculating an optimal explosive quantity and arranging an optimal charge structure

Abstract

The invention provides a method for calculating an optimal explosive quantity and arranging an optimal charge structure. The method comprises the following steps of (1) firstly carrying out a blastingcrater test on a site rock to determine a standard throwing explosive unit consumption value of the rock; (2) calculating the optimum explosive consumption of the rock according to the principle of optimum explosive consumption; (3) calculating the optimal explosive weight of the whole detonation area and each hole. The method for arranging the optimal charge structure adopts a main and auxiliarypack arrangement scheme, and comprises the following steps of calculating the total dosage of the main and auxiliary packs; selecting the correlation coefficients of main and auxiliary drug packages;calculating the minimum resistance line of auxiliary drug pack and calculation of drug dosage; calculating the minimum resistance line of main charge pack, calculation of charge dosage; calculating the interval length between main and auxiliary drug packs. The method for calculating the optimum explosive quantity and arranging the optimum charge structure provided by the invention generates a maximum amount of broken rock by blasting with a minimum amount of explosive, thereby realizing the useful effect of blasting to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of rock blasting, and in particular relates to a method for calculating optimal explosive quantity and optimal charging structure layout. Background technique [0002] The calculation of the current optimal amount of explosives is mainly based on Livingston’s blasting funnel theory, but there is a large gap between the calculation result and the actual amount, so the value calculated according to Livingston’s blasting funnel theory is only used as a reference in engineering practice. More calculations are based on empirical formulas. However, the calculation result of the empirical formula is often a large range, not a clear calculation value, so it can be said that the existing theory and technology have not really solved the calculation problem of the optimal explosive quantity. [0003] In the prior art, the existing theories for the arrangement of the optimal charge structure do not have a clear conclus...

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Problems solved by technology

[0002]The calculation of the current optimal explosive quantity is mainly based on Livingston’s blasting funnel theory. The value calculated according to Livingston's blasting funnel theory is only for reference, and more calculations are based on empirical formulas

However, the calculation result of the empirical formula is often a large range, not a clear calculation value, so it can be said that the existing theory and technology have not really solved the calculation problem of the optimal explosive quantity.

[0003] In the prior art, there is no clear conclusion about the arrangement of the optimal charge structure in the existing theory, because the existing theory has not completely solved the problem of rock fragmentation. The problem of mechanism, because this problem involves the calculation of the explosion energy in the area of ​​the blasting funnel, the distribution of the explosion energy, the decisive factors of how the rock is broken, and the conditions for the rock to achieve the best crushing under the action of a single charge package, etc.

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