Crustal stress prediction method based on actually measured vibration

Abstract

The invention discloses a crustal stress prediction method based on actually measured vibration. The crustal stress prediction method comprises the following steps: 1, obtaining a crustal stress transient unloading and blasting load coupling action process; 2, simulating the vibration response of the surrounding rock under different crustal stress levels when the crustal stress transient unloadingand the blasting load are coupled and when the blasting load is singly acted; 3, solving the difference value between the vibration peak value caused by the coupling effect of the ground stress transient unloading and the blasting load and the vibration peak value independently caused by the blasting load; establishing the relationship between the percentage of the difference value in the vibration peak value caused by the blasting load and the ground stress; and according to the actually measured vibration data, predicting the magnitude of the ground stress of the on-site excavation construction tunnel section by combining the relationship between the percentage of the difference value of the two load vibration peak values in the vibration peak values caused by the blasting load and themagnitude of the ground stress, so as to finish the prediction of the magnitude of the ground stress based on the actually measured vibration. According to the crustal stress prediction method based on the actually measured vibration, the problems that the precision is not high and the inclined stratum is not considered can be solved, and the prediction result is more accurate.

Description

technical field [0001] The invention relates to underground engineering: the technical field of ground stress prediction, in particular to a ground stress prediction method based on measured vibration. Background technique [0002] With the development of science and technology and the increasing population density, people's demand for resources has not only stayed on the surface of the earth, but many engineering construction, space development and resource mining activities have gradually moved to the depths of the earth. Moreover, with the penetration into the earth's interior, the high ground stress caused by the large buried depth always affects the safety and stability of the surrounding rock of the cavern in underground engineering. This high in-situ stress is an important mechanical parameter for the underground rock mass to stimulate and respond to the deformation of the internal units of the rock mass under the action of its own gravity, the pressure of the overlyi...

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide a ground stress prediction method based on measured vibration, which can solve the problem of low precision and does not consider inclined strata, and the prediction result is more accurate

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