Jointed rock blast vibration attenuation parameter predicting method and device

A technology of attenuation parameters and blasting vibration, which can be used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., and can solve problems such as the uncertainty of blasting attenuation parameters

Active Publication Date: 2018-11-16
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, there is a technical problem that the selection of blasting attenuation parameters has uncertainty in the prior art

Method used

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  • Jointed rock blast vibration attenuation parameter predicting method and device
  • Jointed rock blast vibration attenuation parameter predicting method and device
  • Jointed rock blast vibration attenuation parameter predicting method and device

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Embodiment approach

[0040] As an implementation, the basic quality index of the rock mass satisfies: BQ=90+3R c +250K v .

[0041] where the R c is the uniaxial saturated compressive strength of rock, the MPa and the K v is the rock mass integrity index, where K v =(V m / V r ) 2 , V m is the elastic longitudinal wave velocity of rock mass, V r is the rock elastic longitudinal wave velocity, wherein there is a linear relationship between the BQ value and the RMR value.

[0042] Step S102, obtaining attenuation parameters corresponding to each set of the basic quality indicators of the rock mass and the joint angle characteristics.

[0043] Wherein, the attenuation parameters include attenuation coefficient and attenuation index.

[0044] In this embodiment, when estimating vibration damage, the attenuation formula is used to judge the vibration damage of structures and structures with Peak Particle Velocity (PPV) as the standard. In the decay formula, PPV is a function of site condition...

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Abstract

An embodiment of the invention provides a jointed rock blast vibration attenuation parameter predicting method and device and belongs to the field of blast technology. The method includes acquiring basic quality indexes and joint angle characteristics of multiple groups of different rock masses; acquiring attenuation parameters corresponding to the basic quality indexes and joint angle characteristics of the each group of rock masses; based on a preset algorithm, performing regression analysis on the attenuation coefficient and the damped exponential and acquiring a predication formula corresponding to the attenuation parameters. Therefore, uncertainty of attenuation parameter selection can be made up through the predication formula corresponding to the generated attenuation parameters, sothat the attenuation parameters can be selected in advance when blasting is performed by a user. Further, great convenience is provided for the user.

Description

technical field [0001] The invention relates to the technical field of blasting, in particular to a method and device for predicting vibration attenuation parameters of jointed rock mass blasting. Background technique [0002] At present, China's existing blasting-related codes only select the values ​​of Sadovsky's formula vibration velocity attenuation parameters K and a based on the degree of rock hardness, ignoring the characteristics of rock mass joints, and the selection of blasting attenuation parameters is uncertain, so that users can When blasting, I don't know how to select K and a values, which brings great troubles to users. Therefore, there is a technical problem of uncertainty in the selection of blast attenuation parameters in the prior art. Contents of the invention [0003] The present invention provides a method and device for predicting vibration attenuation parameters of jointed rock mass blasting, aiming to improve the above technical problems. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 于崇李海波岳好真
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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