Method for controlling damage of slope pre-splitting blasting digging based on blast vibration test

Abstract

The invention relates to a method for controlling damage of slope pre-splitting blasting digging based on a blast vibration test. The method comprises the following steps: establishing a statistical relation between the blasting particle peak vibration velocity at a plurality of blasting center distances and the damage depth under different altitude difference conditions by utilizing the blasting digging for a few front steps on the basis of the acoustic detection for a slope blasting digging damage area and the corresponding blasting vibration monitoring, and then utilizing the particle peak vibration velocity induced during the slope bench blasting process to forecast the depth of the digging damage area, and offering a control proposal for single-bump explosive quantity. After the relation between the particle peak vibration velocity and the slope blasting digging damage area is established according to a blasting vibration test result of the front steps and the acoustic detection for the damage area, subsequent steps are only subjected to blasting vibration monitoring, and geological data is combined for comprehensively analyzing and adjusting, so that the depth of the slope digging damage area can be determined and the operation is convenient, quick, high-efficient and economical. The rock slope blasting digging damage can be controlled by controlling the maximum single-bump explosive quantity. The method has high engineering popularization and application values.

Description

technical field [0001] The invention relates to the fields of water conservancy and hydropower and geotechnical engineering, in particular to a method for controlling the damage of slope pre-splitting blasting excavation based on blasting vibration testing, which is suitable for slope pre-splitting in fields such as water conservancy and hydropower engineering, transportation, and open-pit mining. Damage control in blasting excavation. Background technique [0002] During the blasting and excavation of rock mass, due to the effect of blast load, dynamic damage to the retained rock mass will inevitably occur while the rock blasting is completed; at the same time, with the formation of a new free surface, the physical and mechanical properties of the rock mass will be preserved. Disturbance and deterioration occur, forming so-called excavation disturbance zones or excavation damage zones. The excavation disturbance area or excavation damage area will have adverse effects on t...

AI Technical Summary

Problems solved by technology

Only by using this propagation attenuation law, it is only possible to judge whether there is damage by whether the particle peak velocity obtained at a certain blast center distance exceeds the allowable limit value, but it is impossible to determine the blasting damage depth

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