Large-span underground construction surrounding rock excavation stability monitoring and early warning method

Abstract

The invention discloses a large-span underground construction surrounding rock excavation stability monitoring and early warning method. The method comprises the steps that a surrounding rock monitoring section is selected, and section monitoring points are arranged; a surrounding rock deformation monitoring device and a stress monitoring device are installed; the surrounding rock deformation monitoring device and the stress monitoring device are applied according to the stability conditions of the surrounding rock at different stability stages, and the stress and displacement of corresponding monitoring points of the different excavation stages are monitored; the surrounding rock excavation displacement power load increasing rate eta i is determined and serves as the surrounding rock excavation stability evaluation parameter, and evaluating and early warning are conducted on the surrounding rock stability. The large-span underground construction surrounding rock excavation stability monitoring and early warning method has the advantages that the underground cavern surrounding rock excavation monitoring area stress change parameter and the corresponding displacement response parameter are organically coupled, the parameters can reflect the dynamic change rule of the surrounding rock stability along with the excavation construction, and analysis and prediction can be carried out on the future surrounding rock excavation deformation development rule and the stability evolutionary trend.

Description

technical field [0001] The invention relates to the field of stability evaluation, monitoring and early warning of surrounding rock in excavation of underground engineering, in particular to a method for evaluating and early warning of surrounding rock stability by using coupling monitoring of stress and displacement of surrounding rock in underground engineering. Background technique [0002] Underground engineering refers to the underground space engineering formed in the strata along with human engineering and production activities. It mainly includes underground caverns formed by underground mining, urban underground space, hydropower underground caverns, and tunnels. With the development of the economy and the progress of society, especially with the full development and utilization of underground space, the span and section of underground projects are becoming larger and larger. In the construction of underground projects, surrounding rock instability and collapse disas...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies and defects of the existing traditional methods of mechanical analysis and evaluation of t...

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