A Method for Calculating Underground Vibration from Ground Vibration Based on Spherical Charge
A ground and conditional technology, applied in seismology, measuring devices, seismic signal processing, etc., can solve problems such as inability to directly reflect underground vibration and inaccurate safety assessment of underground structure vibration, and achieve high economic benefits
Active Publication Date: 2021-07-20
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
[0003] At present, the monitoring of blasting vibration is generally realized by fixing the speed sensor or acceleration sensor on the ground, which can reflect the ground vibration situation, but it cannot directly reflect the underground vibration situation
The current monitoring method of blasting vibration is not accurate enough for vibration safety assessment involving underground structures
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[0083] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following will further explain how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.
[0084] A kind of method that the present invention provides is based on the method for calculating underground vibration by ground vibration under the condition of spherical charge, comprising the following steps:
[0085] S1. Obtain the representative rock sample of the blasting site, measure the density, elastic modulus and Poisson's ratio of the representative rock sample, and calculate the P-wave velocity and S-wave velocity of the rock-soil medium in the blasting site;
[0086]S2. Set a ground monitoring point on the ground of the blasting site, and measure the horizontal distance from the ground monitoring point to the center of the explosion source, the vertical distance from the...
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The invention discloses a method for calculating underground vibration from ground vibration under the condition of spherical charge, which comprises the following steps: measuring the density, elastic modulus and Poisson's ratio of a representative rock sample, and calculating P wave velocity and S wave velocity; The incident P wave is separated from the vibration velocity waveform of the ground measuring point; the position of the underground point to be measured is determined, and the direct P wave, reflected P wave and reflected SV wave reach the underground point to be measured and the P wave reaches the ground measuring point according to the position of the underground point to be measured. The time difference of the point; calculate the vibration velocity of the direct P wave, reflected P wave and reflected SV wave at the underground point to be measured; superimpose the three columns of direct P wave, reflected P wave and reflected SV wave to obtain the underground measured point vibration velocity. The advantages of the invention are: it overcomes the disadvantage that the traditional method of testing ground vibration cannot directly reflect the underground vibration; it only needs to measure the basic mechanical parameters of the rock-soil medium and the vibration of a measuring point on the ground surface, and then the vibration inside the rock-soil medium can be calculated , with high economic benefits.
Description
technical field [0001] The invention relates to the technical field of blasting vibration safety, in particular to a method for calculating underground vibration from ground vibration under the condition of spherical charge. Background technique [0002] Due to the advantages of high efficiency and low cost, blasting construction has been widely used in the field of geotechnical engineering. However, when the seismic vibration caused by blasting has a high amplitude and low frequency, it may endanger the safety of surrounding personnel and buildings. Therefore, it is very necessary to monitor the blasting vibration. [0003] At present, the monitoring of blasting vibration is generally realized by fixing the speed sensor or acceleration sensor on the ground, which can reflect the ground vibration, but cannot directly reflect the underground vibration. The current monitoring method of blasting vibration is not accurate enough for vibration safety assessment involving undergr...
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IPC IPC(8): G01V1/30G01V1/104
CPCG01V1/104G01V1/303G01V1/305G01V1/307G01V2210/6222G01V2210/63
Inventor 李海波李志文李晓锋
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI