Dynamic monitoring system and method for early warning against slope slide of tailing pond of strip mining pit

Abstract

The invention discloses a dynamic monitoring system for early warning against slope slide of a tailing pond of a strip mining pit. The system comprises a pond water level change monitoring unit, a land surface crack and displacement monitoring unit, a deep part deformation and displacement monitoring unit and a microscopic tour-inspection monitoring unit. The system has the advantages that main factors that cause slope slide can be analyzed, and monitoring has focuses. The significant structure surface that causes slop slide is analyzed for the engineering geological environment of the tailing pond of the strip mining pit, and the positions, depths and amount of deep part displacement monitoring points are determined correspondingly; and water level change is determined to be a main factor that influences the slope stability via a finite element reduction method and indoor compression test. Monitoring for water level change is enhanced, the monitoring frequency of other monitoring units is determined according to water level change data, focus monitoring is carried out in key periods, and common monitoring is carried out in normal periods. The invention also discloses a monitoring method in which the monitoring system is used.

Description

technical field [0001] The invention belongs to the field of rock slope stability analysis and landslide early warning, in particular to a dynamic monitoring system and a monitoring method for slope landslide early warning of open pit tailings reservoir. Background technique [0002] High and steep rock slopes are a common type in the stability analysis of rock slopes. They are widely distributed in mines and tunnels. Under the action of self-gravity stress, with the development of open-pit mining activities, the free surface of the slope gradually increases. , the probability of landslides gradually increases. The opening of fissures at the rear edge of the slope makes the rainfall infiltrate continuously, the hydrostatic pressure and hydrodynamic pressure on the structural surface intensify the danger of landslides, and the surface displacement continues to increase. [0003] After the open-pit gold mining task is over, the mine pit is used as a tailings pond adjacent to ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly three problems in the commonly used dynamic monitoring system: First, the existing dynamic monitoring system is not comprehensive for the necessary monitoring content to ensure the safe use of open-pit tailings ponds, and the general open-pit tailings pond slope dynamic monitoring The system dynamically monitors the displacement and stress changes of the slope itself, but does not analyze the leading factors that induce slope instability, thus lacking the monitoring of the main triggering factors

For open-pit mine tailings ponds, the damage to pit rocks due to changes in water level is a direct factor leading to increased displacement and a contributing factor to landslides, so the monitoring of water level changes should be strengthened; the second is the cost of dynamic monitoring systems Higher, with the development of science and technology, advanced instruments and equipment are applied to landslide monitoring, such as acoustic emission monitoring, magnetic sensors, three-dimensional laser scanning and other technologies, although they can monitor the safety status of slopes with high precision, but the cost Higher, and the instruments and equipment are relatively sophisticated, and are easily damaged by human factors; third, the monitoring frequency and early warning value of the monitoring indicators of the existing monitoring system are fixed values

However, for open-pit tailings ponds, the discharge status of tailings is a dynamic variable, and the fixed monitoring frequency cannot achieve optimal monitoring, so it is necessary to establish a more comprehensive dynamic monitoring system

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