Slope Stability Radar Ultimate Solution for Monitoring Slopes And Managing Slope Instability Hazards:
Assessing and managing instability hazard in open pit mines is an essential activity when working with the natural and engineering slopes, due to its potentiality for loss of life and property. The slope stability radar (SSR) is an all-weather system that remotely scans wall of the slopes to measure the slope surface movement with sub-millimeter precision. It allows user to detect and alert personnel of rock movements that result in instability. It allows greater productivity without compromising safety.
All slope monitoring is required to identify precursor phenomena that occur prior to a failure. A number of signs may occur prior to slope collapse, including the widening of cracks on the wall, new fracturing seen on the surface and slope surface, audible noise (cracking and popping sounding), dislocation(sharing) along fractures, and rolling of loose material from the rock face. However, not all signs can be observed prior to collapse and it is very difficult to predict the progression of failure towards collapse by reviewing such qualitative phenomena. This usually results in overcautious decisions that impact on road access and productivity, while the reverse places live at higher risk.
The reliable indicator of instability involves the quantitative measurement of outward or inward movement and acceleration of material as an instability occurs for an extended period prior to rock slope failure—
The standard methods for dealing with slope instability are:–
- Development of a monitoring system
- Adopting acceptable deformation criteria
- Warning and alert systems
- Design of stabilization works
- Risk/hazard mitigation strategies.
- The SSR system is housed in a self-contained trailer which can be easily and quickly moved around the site
- The radar dish, electronics module, and computer module are placed on a tripod which detaches from the trailer during deployment so that vibrations from the trailer and generator don’t degrade the reliability and performance of the radar.
- It provides immediate monitoring of slope movement without calibration or any prior history. Scan times are normally every 1 to 10 minutes, depending on the size of the selected scan area.
- Data from the Slope Stability Radar is usually presented in 2 formats. Firstly, a color ‘rainbow’ plot of the slope representing overall movement quickly enables the user to determine the extent of the failure and the area where the greater movement is occurring. Secondly, time vs displacement graphs, which can be selected at any location to evaluate displacement rates
- The essential component of the SSR software is the alarms. It provides warning for work crews of impending instability so that appropriate actions can be taken. Alarms can be based on the amount of deformation on a sloped surface or the rate of displacement.
- Truck mounted mobile equipment
- RAPS(Remote area power supply)
- CEB (Computer electronics box) :operation of SSR & displaying of data
- REB(radar electronics box): Radio wave generation & data analysis
- Tripod: Positioning of SSR
- Repeater: Collects data from SSR & transfer these to PMP system
- PMP: Primary monitoring point
- High precision measurement (±0.2 mm)
- Broad area coverage (1000’s points/scan)
- Continuous monitoring (2 – 8 min/scan, 24 hrs/day)
- 100m – 1700 m range
- All weather operation (including dust, rain, fog, smoke)
- Mobile & easy to set up
- Self-powered System scans 270° horizontally and 100 ° vertically