Method and system for monitoring landslide stability based on microfractures

Abstract

The invention discloses a method and system for monitoring the stability of a landslide body based on micro-cracks, wherein the method includes: deploying and installing microseismic monitoring equipment in the landslide body for real-time data collection; and continuously monitoring two time windows before and after the landslide body is disturbed by external stress The high-frequency vibration signal within; use the high-frequency energy integral ratio to calculate the logarithmic ratio of the spectral density integral value of the high-frequency vibration signal in two time windows; respectively count the preset time period before and after the time period when the landslide is subjected to stress disturbance The high-frequency vibration signal is used as the background, and the logarithmic ratio of the integrated value of the spectral density of the background is calculated; the probability that the background logarithmic ratio is less than or equal to the disturbance logarithmic ratio under the probability density distribution function of the background logarithmic ratio is calculated as the confidence level of the microrupture , to judge the stability of the landslide. Through the technical solution of the invention, the microcrack triggered by the stress disturbance is automatically identified, and the safety factor value reflecting the stability of the slope is given, which directly reflects the stability of the slope.

Description

technical field [0001] The invention relates to the technical field of geological monitoring, in particular to a method for monitoring the stability of a landslide body based on micro-cracks and a system for monitoring the stability of a landslide body based on micro-cracks. Background technique [0002] Natural stress disturbances (such as earthquakes, industrial blasting, piling, vehicle traffic, high-pressure water injection in deep wells, and water storage in large reservoirs) can change the stress state of landslides in the region, thereby changing the stability of the slope. When the risk of the landslide is high and it is close to the unstable state, the external stress disturbance will cause the high-risk area in the landslide to reach the critical value first, resulting in microcracks. The traditional landslide stability evaluation methods include engineering geological analysis method and mechanical balance calculation method. [0003] The engineering geological a...

AI Technical Summary

Problems solved by technology

Knowing the actual geological conditions of slopes is often limited, wrong calculation methods, selection of calculation parameters and neglect of the rainstorm factor all directly affect the stability calculation results, which damages the rigor of the method

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