A method for predicting geological hazards in tunnel construction

Abstract

The invention discloses a method for predicting geological disasters in tunnel construction, which includes the following steps: before S1 tunnel excavation, detect information about geological defects in the tunnel surrounding rock in front of the tunnel face; during S2 tunnel excavation, collect geological defects Surrounding rock rupture source information and auxiliary source information in the cave; S3 determines the corresponding microseismic event information and the seismic wave transmission velocity corresponding to the microseismic event information based on the rock rupture source information; S4 corrects and calibrates step S3 according to the velocity model optimized by the formation The seismic wave transmission speed in the system is used to correct and calibrate the microseismic event information; S5 predicts geological disasters caused by tunnel construction in real time. This invention combines seismic wave method and microseismic monitoring technology, considers seismic waves caused by construction factors, corrects and calibrates microseismic events of rock mass rupture, and predicts possible collapse, roof collapse and other geological disasters during the construction process in real time.

Description

technical field [0001] The invention relates to the technical field of geological disaster forecasting, in particular to a method for forecasting geological disasters in tunnel construction. Background technique [0002] In the construction of underground projects in our country, tunnels are often used to cross mountains along highways or railways. During tunnel construction, due to the complex and changeable geological bodies in front of the tunnel face, faults, karst caves, broken zones, underground rivers, and high ground stress are often encountered. Geological conditions, if the geological conditions in front of the tunnel cannot be grasped in time, it is likely to cause geological disasters such as landslides, water gushes, rockbursts, and even debris flows. Carrying out geological advance forecasting is of great significance to the quality and safety of tunnel construction. [0003] At present, the advanced geological prediction technology usually focuses on the eval...

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Problems solved by technology

[0003] At present, the advanced geological prediction technology usually focuses on the evaluation and description of the four elements of geological defects, which only belongs to the investigation category of the construction process, and does not take into account the tunnel construction, which is an important factor that directly triggers the occurrence of geological disasters.

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