The study of slope stability is an issue of great interest to mining companies. The groundprobe slope stability radar ssr was developed to provide an improved tool to manage risk related to slope instability. The system, known as slope stability radar ssr, uses real aperture, 2 beamwidth radar to scan a slope both vertically height and horizontally azimuth. The spokane research laboratory of the national institute for occupational safety and health niosh is currently conducting research to. Slope stability radar provide slope stability warning impending failure and also it has used for setting out threshold value. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability.
Instead of assuming a circular failure surface, the slope was analyzed for noncircular failure by optimizing surfaces in a path search. Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. Indian mines 80 % mining is open cast and remaining underground mines. May 06, 2011 slope stability radar technology the ground probe ssr is a technique for monitoring open pit mine walls based on differential interferometry using radar waves. Slope stability radar for monitoring mine walls bryan reeves, david noon, glen stickley, dennis longstaff cooperative research centre for sensor signal and information processing cssip the university of queensland, australia abstract determining slope stability in a mining operation is an important task. Stability of slopes of municipal solid waste landfills.
Scanning at a rate of 10sec over a range of 60 vertically and 340 horizontally, the system continuously monitors the slope face for deformation. It can be used mainly for preliminary analysis of slopes since it can provide an estimate of the factor of safety with minimum effort from the user. However the minimum constructive elements provided in the program do not allow the software to perform analysis for complex cases. A previously stable slope may be initially affected by preparatory. Ibis guardian enables fast interpretation and therefore fast reaction time to vital realtime information delivered by the ibisfm radar system. Our specialised suite of products and services, and the invaluable data that they deliver, actively assist a global community of professionals to make confident, informed decisions to better manage risk, increase productivity, and ensure maximum safety. The concept is based on the considerable success achieved by differential interferometry obtained with synthetic aperture radar, which can measure.
Cdc mining detecting problems with mine slope stability. Application note slope stability analysis worked example. Program stabl is a computer program written for the general solution of slope stability problems analysis. Failures translational type failure of slope along weak zone of soil. Slope stability analysis slopew is the leading slope stability software for soil and rock slopes. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of determining, relatively unambiguously, whether a. The spokane research laboratory of the national institute for occupational safety and health niosh is currently conducting research to reduce the fatalities associated with slope failures.
The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. The radar is assessed as a very suitable technique for monitoring slope stability. The ssr uses radar to remotely scan a rock slope, continuously measuring movement of the face. Stability is determined by the balance of shear stress and shear strength. Other information related to installation and commissioning of ssr at.
Such systems are now being deployed at several locations around the world. For larger movements, the radar indicates that a movement has occurred but the accuracy is reduced. Application note slope stability analysis worked example 1 introduction this note describes the typical steps followed in setting up and analysing a slope stability problem with limitstate. So slope stability monitoring is a vital component in any surface mine and is an. Koodhathinkal university of central florida, orlando, florida, usa abstract this paper deals with the impact of the addition of biosolids on the geotechnical properties of class i landfills with municipal solid waste msw. Slope stability radar for managing rock fall risks in open. A previously stable slope may be initially affected by preparatory factors, making the slope conditionally unstable. The data from the slope stability radar is presented in two formats.
Trigrs a fortran program for transient rainfall infiltration and gridbased regional slopestability analysis, version 2. Slope stability accidents are one of the leading causes of fatalities at u. How do friction and cohesion work together to stabilize slopes. A slope failure could influence the environment, lead to human injuries and economic. The first slope stability radar of groundprobe, australia, supplied and commissioned by ms.
Using differential radar interferometry, the system can detect deformation movements of a rough wall with submillimeter accuracy. Monitoring and evaluating of slope stability for setting. The system scans a region of the wall and compares the phase measurement in each region with the previous scan to determine the amount of movement of the slope. The slope stability radar has been developed to remotely scan a rock slope to continuously monitor the spatial deformation of the face. Groundprobe is a global technology leader that provides advanced hardware and software solutions to the mining industry. Firstly, as a coloured rainbow plot of total movement which quickly enables the user to determine the extent of the failure and where the greatest movements are occurring which is useful to characterise the type of failure. Aug 06, 2014 download spreadsheet to calculate slope stability calculation. Geostase is a 2d limit equilibrium slope stability analysis software program developed by dr. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Interferometric synthetic aperture radar insar and global positioning system gps observations to investigate the slope stability of the sarcheshmeh landslide, northeast iran. They are certainly major factors in cut slope stability and in. While less than 1% of reported mine accidents are associated with slope stability problems, slope failure accidents were responsible for about 15% of u. Pdf slope stability radar for monitoring mine walls researchgate.
Case studies of slope stability radar used in open cut mines dr neal harries1, dr david noon1, mr keith rowley2 1groundprobe australia 2groundprobe south africa abstract the management of risks associated with slope instability is an essential process in the safe and economic operation of open cut mines. Sliding mass travel long distance before coming to rest. How does the slope angle play a role in slope stability. Interferometric synthetic aperture radar, abbreviated insar or deprecated ifsar, is a radar technique used in geodesy and remote sensing. Program stabl is a computer program written for the general solution of slopestability problems. Pdf slope stability radar for monitoring mine walls. Stability analysis of 3d geonet slope protection system in. Civilax is the knowledge base covering all disciplines in civil engineering.
The sarcheshmeh landslide is a northwesterlydirected slope in the province of north khorasan in northeastern iran figure 2. The ssr technology is now considered bestpractice by the global mining industry for managing unstable and productioncritical slopes. Download spreadsheet to calculate slope stability calculation. Pdf case studies of slope stability radar used in open cut mines. Case studies of slope stability radar used in open cut mines dr neal harries, dr david noon, mr keith rowley the south african institute of mining and metallurgy abstract the management of risks associated with slope instability is an essential process in the safe and economic operation of open cut mines. Slope stability analysis slope stability analysis stabilizing a slope using antislide piles stabilizing a slope using antislide piles inputting geometry by importing data from a dxf file inputting geometry by importing data from a dxf file using standards and analysis settings using standards and analysis settings importing data in txt format. Slope stability radar technology the ground probe ssr is a technique for monitoring open pit mine walls based on differential interferometry using radar waves. Slope stability analysis by the limit equilibrium method. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams. Role of mining radar in mine slope stability monitoring at open. Predictive index for slope instabilities in open pit mining.
Slope stability reference guide for national forests forest sewice engineering staff in the united states washington, dc em71 701 3 volume i11 august 1994 coordinators. Applications of groundbased radar to mine slope monitoring. Slope stability is the potential of soil covered slopes to withstand and undergo movement. Next to gravity, water is the most important factor in slope stability. Monitoring and evaluating of slope stability for setting out. The ssr remotely scans rock slopes to continuously measure any surface. Slope stability is crucial for safety in operations during open pit mining. Slope stability assessment of the sarcheshmeh landslide. By adopting the limit equilibrium method, a slope stability analysis model is established.
This geodetic method uses two or more synthetic aperture radar sar images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite or aircraft. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. This type of analysis is also utilized to determine. Ids georadar was the first company to introduce to the mining market an innovative slope monitoring radar based on the sar synthetic aperture radar technology which has previously been successfully applied to landslide and dam monitoring. Generally, issue of slope failure occurs at open cast mines due to undisciplined mining, impacts of weather conditions. Monitoring and evaluating of slope stability for setting out of critical. The name geostase is an acronym for general equilibrium options for stability analysis of slopes and embankments. The management of risks associated with slope instability is an essential process in the safe and economic operation of open cut mines. Fundamentals and methods presents basic principles for the safe design of constructed or natural earth slopes.
Over 80 slope stability radar ssr systems have been installed at major mines around the world to manage those risks. The limit equilibrium method is the most common approach for analyzing slope stability in. It is very accurate as an indicator of zero movement, and performs within the speci. The slope stability calculated for bishop, janbu, spencer and gle is summarized in the graph below. Review of radar system performance and estimation of slope. To file a complaint, write the secretaly of agriiulture, us. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. As part of an ongoing study of monitoring technologies, researchers from niosh and brigham young university, provo, ut, cooperated to assess the feasibility of using interferometric radar to monitor mine slope stability. Slope stability monitoring and evaluating play vital role in the risk management of open cast mines. The slope stability radar ssr has been developed to better manage those risks. Pdf the management of risks associated with slope instability is an essential process in the safe and economic operation of open cut mines. Chapter 10 slope stability analysis nysdot geotechnical page 104 january 21, 2014 design manual 10. Ge, principal consultant with gregory geotechnical gregeo.
Why our church no longer plays bethel or hillsong music, pastor explains false teachings duration. Use of lidar in landslides detection and hazard assessment. Stability of slopes of municipal solid waste landfills with codisposal of biosolids m. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. In recognition of his years of guidance and support as a mentor and friend to geotechnical specialists in the northwest, we dedicate these volumes, a summary of what we have. Pdf case studies of slope stability radar used in open cut. Slope stability radar for monitoring mine walls uq espace. So slope stability monitoring is a vital component in any surface mine and is an essential component for planning deeper and steeper deposits, in terms of. A technique for the calculation of slope stability based upon the assumption of a plane surface of failure through the toe of the slope has been proposed by culmann see taylor, 1948.
Union minister of state, shri hansraj ahir along with the chairman. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. The slope stability radar ssr has been developed to. The effect of water on cut and fill slope stability is briefly discussed below.
Slope stability radar for monitoring mine walls article pdf available in proceedings of spie the international society for optical engineering 4491 november 2001 with 2,763 reads. Download pdf download epub endorsements open access will. The slope stability radar is a new technique for monitoring mine walls and general slopes. Pdf case studies of slope stability radar used in open. Slopew can effectively analyze both simple and complex problems for a variety of slip surface shapes, porewater pressure conditions, soil properties, and loading conditions. They are certainly major factors in cut slope stability and in the stability of fill slopes involving both internal and external slope failures. Powerful and userfriendly, the ibis guardian software manages slope stability risks in both geohazard assessment and open pit mining operations. Simslope stands for simplified slope stability analysis software. Department of agriculture slope stability reference guide for national forests forest sewice engineering staff in the united states washington, dc em71 701 3 volume i11 august 1994. The slope stability radar has been developed to remotely scan a rock slope to. Assessing and managing instability hazards is an essential activity when working with both unstable natural slopes and engineered slopes. Modeling slope stability using an infiniteslope stability analysis failure of a infinite slope is characterized by the ratio of resisting basal friction material properties to gravitionally induced downslope basal driving stress terrain properties.
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