Method for predicting peak vibration velocities of shallow-buried tunnel blasting construction surface particles

A technology of shallow buried tunnel and prediction method, which is applied in tunnels, earthwork drilling, instruments, etc., can solve problems such as the properties of explosives and rock properties that cannot be considered

Inactive Publication Date: 2017-08-18
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

The traditional Sadovsky formula can only reflect the influence of the single factor of charge on the peak particle velocity, but cannot consider the influence of explosive properties, rock properties, etc. on the particle peak velocity

Method used

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  • Method for predicting peak vibration velocities of shallow-buried tunnel blasting construction surface particles
  • Method for predicting peak vibration velocities of shallow-buried tunnel blasting construction surface particles
  • Method for predicting peak vibration velocities of shallow-buried tunnel blasting construction surface particles

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Embodiment

[0093] During the construction of shallow-buried large-section tunnels, the CRD construction method is mostly used, so the present invention takes the CRD construction method as an example. During the CRD construction process, the entire excavation and blasting is divided into four parts. When the tunnel is blasted in the upper left pilot pit and the upper right pilot pit, the impact on the existing structures is much greater than that of the lower left pilot pit and the lower right pilot pit, so the monitoring of the upper left pilot pit and the upper right pilot pit is mainly used; the specific implementation Proceed as follows:

[0094] (1) According to the test blasting, set the upper and lower limit parameters of the blasting vibration test. In this embodiment, before the test, the maximum vibration velocity of the tunnel blasting was obtained through field trial blasting to be 8 cm / s. In order to ensure that the signal is effectively collected and avoid false triggerin...

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Abstract

The invention relates to a method for predicting peak vibration velocities of shallow-buried tunnel blasting construction surface particles. The method comprises the following steps of: firstly obtaining a peak particle vibration velocity theoretical equation under a porous initiating condition on the basis of a principle that porous blasting is equivalent to single-hole blasting, and correcting the peak particle vibration velocity theoretical equation; carrying out linear regression analysis on a peak particle vibration velocity of a measurement point, fitting parameters, topography and geology-related coefficients and blasting vibration attenuation indexes, and substituting the parameters, the coefficients and the indexes into the peak particle vibration velocity theoretical equation under the porous initiating condition; and finally substituting a known blast hole radius, an explosive density, a charging diameter and a distance between a surface particle and a blasting source into the peak particle vibration velocity theoretical equation so as to calculate a peak vibration velocity of the surface particle. According to the method, the existing single-hole blasting theoretical equation is corrected to obtain the peak particle vibration velocity theoretical equation under the porous initiating condition, so that the influences, on the peak vibration velocity, of explosive nature, rock performance and charging parameters can be reflected, and the blasting peak vibration velocities of fixed points on the surface can be calculated according to the practical blasting parameters and geological conditions.

Description

technical field [0001] The invention relates to the technical field of tunnel blasting construction safety, in particular to a method for predicting the peak vibration velocity of surface particle in blasting construction of a shallow buried tunnel. Background technique [0002] The construction safety of shallow-buried large-section tunnels and passing through existing structures has always been a technical difficulty in tunnel construction. A large number of scientific and technological workers have devoted themselves to researching the peak vibration velocity of surface particles of tunnels in shallow-buried and passing through existing structures, and have achieved many results. Regarding the impact of blasting construction on surface structures, the peak particle velocity is the most important criterion for judging. However, the methods currently used to predict the peak vibration velocity of surface particles have many defects and deficiencies. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21D9/00
CPCE21D9/006G06F30/20
Inventor 邓祥辉王睿张永杰卢泽霖杨俊
Owner XIAN TECHNOLOGICAL UNIV
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