Deeply-buried rock blasting excavation induced vibration prediction method based on energy principle

Abstract

The invention provides a deeply-buried rock blasting excavation induced vibration prediction method based on the energy principle. The method comprises a first step of establishing a peak vibration velocity prediction formula based on the energy balance principle through a dimension analysis method; a second step of arranging a vibration monitor on the wall of a deeply-buried underground tunnel to be blasted and excavated so as to record rock vibration waveform in blasting to acquire surrounding rock vibration response; and a third step of computing explosion energy of the explosive contained in each blast hole and strain energy of the to-be-excavated rock according to blasting parameters of the deeply-buried underground tunnel and site environment, and computing unknown coefficients of the prediction formula by a multivariate regression analysis method according to measured blasting vibration peak velocity so as to predict deeply-buried rock blasting excavation induced vibration. The method greatly improves the prediction precision of deeply-buried rock blasting excavation induced vibration, and can be widely used in prediction of blasting excavation induced vibration of deeply-buried underground engineering like communication, water and electricity, mine and so on.

Description

technical field [0001] The invention relates to a vibration forecasting method, in particular to a vibration forecasting method based on the principle of energy for blasting and excavation induced by deep rock mass. Background technique [0002] With the development of my country's social economy, the demand for energy is increasing, and there are more and more deep rock mass excavation projects, such as the excavation of underground caverns for hydropower stations in Southwest China, mining of thousands of meters deep, Construction of nuclear waste underground storage, etc. Under the conditions of large burial depth and high geostress, the rock mass stores relatively high elastic strain energy. During the blasting and excavation process, with the detonation of the explosive in the blasthole, huge energy is released in the form of high-temperature, high-pressure gas and shock waves, which cause the rock mass around the blasthole to be broken. On the newly formed excavation c...

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Problems solved by technology

[0007] Aiming at the defects of the existing deep rock mass excavation blasting vibration prediction method as mentioned above, the present invention proposes a method for forecasting vibration induced by deep rock mass excavation blasting and excavation based on the energy principle, so as to achieve more accurate prediction of deep rock mass excavation The purpose of blasting vibration

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