Method for predicting underwater blasting explosive load on basis of trial blasting data

Abstract

The invention discloses a method for predicting the underwater blasting explosive load on the basis of trial explosion data. The method comprises the following steps that firstly, numerical values of undetermined parameters K, beta1 and beta2 are fit out through a trial explosion data substitution formula; according to the features of a protected building (structure) in the underwater blasting neighborhood, the permissible blasting vibration speed V in each frequency range is found out by referring to the Blasting Safety Regulation (GB6722-2014); then, the number Qmax of the blasting simultaneous explosives is calculated according to a formula; and as the maximum permissible blasting vibration speed V is associated with the blasting vibration dominant frequency, Q max' is obtained. The prediction method is simple, the blasting effect and the blasting harm are observed through experimental testing, the blasting vibration harm of the construction scheme is calculated through the trial blasting result, and the trial blasting effect observation data and the expected effect of the blasting construction scheme have scientific association and can be based on the scientific association.

Description

technical field [0001] The invention relates to a method for predicting charge quantity of underwater blasting based on blasting test data, which belongs to the field of engineering blasting. Background technique [0002] When explosives explode in the medium, part of the energy must be converted into seismic waves, and spread rapidly from the explosion source to the surrounding medium, causing vibrations on the ground surface and buildings (structures), which may cause damage to nearby buildings (structures) that are not blasting targets. Different degrees of damage, this phenomenon is called blasting vibration effect. With the rapid development of national economic construction, blasting operations have been widely used, and the harm caused by the corresponding blasting vibration effect has aroused people's great attention. [0003] However, in engineering practice, blasting engineering technicians evaluate the possible vibration hazards of blasting construction schemes m...

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Problems solved by technology

[0003] However, in engineering practice, blasting engineering technicians evaluate the possible vibration hazards of blasting construction schemes mainly through the following two measures: (1) Citing the empirical formula derived by the scholar Sadovsky based on Newtonian mechanics For calculation, because the coefficient K and the attenuation index α related to the terrain and geological conditions between the blasting point and the protected object in the calculation formula are in a relatively large range, the selection of parameter values ​​​​at the time of calculation depends entirely on the personal experience of technicians, and there is no clear basis , making it difficult to guarantee the rationality of the accounting results; (2) conduct experimental tests to observe the blasting effect and blasting hazards through the blasting test results, but the blasting vibration hazards of the construction plan based on the blasting test results are completely dependent on personal experience, and there is a lack of observation data on the blasting effect The scientific correlation with the expected effect of the blasting construction plan makes it difficult to guarantee the scientific and rational design of the blasting construction plan based on the blasting test data feedback

[0004] In addition, the above two measures are widely used in the engineering blasting industry due to their simplicity and ease of operation, and have good application effects in the field of blasting demolition, but they have brought a lot of confusion in the field of underwater blasting

In particular, the losses and disputes caused by blasting vibration hazards often make blasting operations difficult to implement, which greatly affects normal engineering construction

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