Debris flow forewarning system and debris flow forewarning method

Abstract

The invention discloses a debris flow forewarning system and a debris flow forewarning method. The system comprises an earth sound monitor, an air infrasound monitor and a telemeter main station. The method comprises the steps that a time difference of an air infrasound signal to the air infrasound monitor and an earth sound signal to the earth sound monitor is obtained according to propagation speeds of the earth sound signal and the air infrasound signal, the telemeter main station starts timing according to earth sound signal forewarning information sent by the earth sound monitor, whether time of the air infrasound signal, sent by the air infrasound monitor, to the telemeter main station is equal to the time difference of the air infrasound signal and the earth sound signal to the monitor or not is judged, the telemeter main station monitors occurrence of debris flow if the time is equal to the time difference, and the telemeter main station monitors as an interference signal if not. The time difference is formed through distribution of an earth sound and an air infrasound in space distance. Debris flow forewarning precision is greatly improved through the time difference to accurately judge an infrasound signal of the debris flow. The debris flow forewarning system and the debris flow forewarning method have a strong anti-inference ability, are capable of forewarning the occurrence of the debris flow accurately and timely, and ensure safety of lives and properties.

Description

technical field [0001] The invention relates to the field of geological monitoring, in particular to a debris flow early warning system and method. Background technique [0002] Due to the complex geological conditions, our country is a place where debris flow disasters frequently occur. Debris flow is a geological action between running water and landslides. A typical debris flow is composed of viscous mud with coarse solid debris suspended and rich in silt and clay. Under appropriate terrain conditions, a large amount of water soaks the solid accumulation in the hillside or ditch bed, reducing its stability, and the water-saturated solid accumulation moves under its own gravity, forming a debris flow. Mudslides generally erupt suddenly and come fiercely. They can carry huge stones and advance at high speeds. They have powerful energy and are therefore extremely destructive. The main harm of mudslides is to destroy towns, enterprises, institutions, factories, mines, and v...

AI Technical Summary

Problems solved by technology

There are two disadvantages of this scheme. First, it is susceptible to interference. If there are mining, mountain man-made blasting and other operating activities near the monitor, the same geoacoustic signal will be transmitted to the monitor through the rock formation.

Second, there is a hidden danger of underreporting. When the underground rock fault 5 from the source of the debris flow to the monitoring instrument appears, the infrasound signal caused by the debris flow will be absorbed by the soil 4 and cannot reach the geoacoustic sensor of the monitoring instrument. The monitoring instrument cannot give timely and accurate warnings. May cause great loss of life and property

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