The use of slope stability radar ssr in managing slope. This program is used for design of pile walls stabilizing slope movement or increasing safety factor of the slope. Simslope stands for simplified slope stability analysis software. Application note slope stability analysis worked example. Accordingly, we have an interest in investigating the individual pulses.
Reutech mining safety and productivity through accuracy. 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. Slope stability model of the questa rock pile phase 2 murray fredlund soilvision systems ltd. The kinematic approach of limit analysis is explored in threedimensional 3d stability analysis of slopes. 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. Slope stability is crucial for safety in operations during open pit mining. Bottom, left graphical 3d representation of aerial lidar data collected on federal highway route. Stability analysis of slopes with surcharge by lem and fem international journal of advanced structures and geotechnical engineering issn 23195347, vol. The system scans a region of the slope and divides the area of interest into pixels. Pdf slope stability radar alarm threshold validation at. Limit analysis and stability charts for 3d slope failures radoslaw l. The video picker helps you find videos that match your interests. View insar slope stability research papers on academia. We selected six openpit wall collapses, representing a variety of failure sizes, failure types and rock mass characteristics, in order to assess the accelerating creep theory by voight and fukuzono as an early forecasting tool.
Pdf the management of risks associated with slope instability is an essential process in the safe and economic operation of open cut mines. 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. Slope stability radar ssr slope stability radar is used to assess overall slope stability over an extended period and to critically monitor slopes that may become unsafe. Slope stability radar for monitoring mine walls uq espace. For larger movements, the radar indicates that a movement has occurred but the accuracy is reduced. Groundprobes unique measurement systems provide slope stability monitoring and management as well as subsurface mapping for mining and infrastructure applications. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. Microsoft partnered with core to link documents in the microsoft academic graph with open access articles in core, as the datasets complement each other. Hxgn geomonitoring hub integrated slope stability platform for mine. Slope stability radar being an advanced monitoring system, gives advance information for slope movement.
Validation of the slope monitoring programme at nchanga. Slope stability radar and the monitoring of the roof of the sishen cave is the topic. Pdf slope stability radar for monitoring mine walls. The slope stability radar ssr has been developed to better manage those risks. A good knowledge of the mechanism of slope failure in opencast mines can be understood by evaluating the intrinsic and extrinsic factors and their interactions in causing slope instability, and by gathering displacement information from periodical monitoring. Antioverturning stability numerical analysis of a concrete single column bridge is introduced in this paper. 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. 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. Currently in its third series, its the industrys most reputable, most proven system.
Combining different technologies for better assessing. 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. The ssr covers a large expanse of the wall slope and can detect deformations within the slopes well before slope failure occurs. Stability analysis of slopes with surcharge by lem and fem. Influence analysis of rainfall infiltration on stability of. Interferometric synthetic aperture radar, abbreviated insar or deprecated ifsar, is a radar technique used in geodesy and remote sensing. Monitoring and evaluating of slope stability for setting out. However the minimum constructive elements provided in the program do not allow the software to perform analysis for complex cases. Appendix c slope stability analyses table of contents figures summary of slope stability analyses, sheet 2 soil parameters, sheets 3 to 6 slope stability calculations. While less than 1% of reported mine accidents are associated with slope stability problems, slope failure accidents were responsible for about 15% of u. Slope monitoring, threshold value, leveaniemi open pit. Development of an earlywarning timeoffailure analysis. This smart science instrument, known as a slope stability radar, is mobile, weatherproof and ready to assess the stability.
Top, right existing slope failure on mdot trunkline. The calculation is repeated for large number of times, which result to the pdf of factor of. It allows for 24 h per day, realtime monitoring of slopes in allweather condition. 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. In the last 3 years four new stateoftheart monitoring systems have been installed namely an issi microseismic monitoring system, a geomos automated prism monitoring system, prismless riegl laser scanners and a groundprobe slope stability radar ssr. Slope stability radar is used to assess overall slope stability over an extended period and to critically monitor slopes that may become unsafe. The management has deployed the ground probe slope stability radar ssr imported from brisbane, australia to monitor 24hour slope movement with a very high degree of precision. Cil s response on the clarification queries sought. Radar accuracy is a measure of the ability of a radar system to determine the correct range, bearing, and in some cases, altitude of an object. 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. Open pit, slope stability, 3d limit equilibrium method, consequence of failure perusahaan pertambangan batubara, corporate social responsibility pit lake, kualitas air pit lake, pemanfaatan pit lake reklamasirevegetasi, low wall, bioremediasi, fitoremediasi slope stability radar, slope failure, velocity, slo method terrestrial laser scanner.
Center, right 16inch diameter steel pile driving at proposed bridge abutment. Antioverturning stability numerical analysis of single. Role of mining radar in mine slope stability monitoring at. 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. Pdf case studies of slope stability radar used in open cut. Defining critical velocity ranges and observing and documenting typical deformation trends that occur prior to collapse is also important. Ak developed the theory, performed the computations and verified the analytical methods. Slope stability radar provide slope stability warning impending failure and also it has used for setting out threshold value. The first analysis should be done in the slope stability program, where the active an. Slope stability radar ssr, developed on the above radar technology, is now being. Rr encouraged ak to investigate monitoring and evaluating of slope stability for setting out of critical limit at slope stability radar and supervised the findings of this work.
Groundbased slope stability radar groundbased slope stability radar systems remotely measure the surface deformation of a slope from a stationary platform without the need for re. 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. Apssim 2016, brisbane, australia 369 slope stability radar alarm threshold validation at telfer gold mine p saunders et al. There is also an increasing undertaking among mining companies to combine and analyse data from these sensors together, rather than each one in isolation. The slope stability radar system is currently in use across the global mining and civil industries. It also highlights some of the differences in approach to that adopted by the limit equilibrium method of slices. Slope stability monitoring and evaluating play vital role in the risk management of open cast mines. Ibis guardian enables fast interpretation and therefore fast reaction time to vital realtime information delivered by the ibisfm radar system. 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. Stability of the environment to determine the environmental stability, one must calculate the lapse rate for a sounding lapse rate dtdz t2t1z2z1 since the environment is often composed of layers with different stabilities, it is useful to first identify.
Ali, stability analysis of vertical and inclined backfilled stope below 7. As a result, the stability of a mines slope is crucial for safety management. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. Review of radar system performance and estimation of slope. Monitoring and evaluating of slope stability for setting. The slope height and profile were analyzed for stability assuming circular shear failure.
Slope stability radar alarm threshold validation at telfer. The slope stability radar has been developed to remotely scan a rock slope to continuously monitor the spatial deformation of the face. Slope stability model of the questa rock pile phase 2. The groundprobe slope stability radar ssr was developed to provide an improved tool to manage risk related to slope instability. Overview of radome and open array radar technologies for waterborne applications 8 of. Slope stability evaluations by limit equilibrium and. This smart science instrument, known as a slope stability radar, is mobile, weatherproof and ready to assess the stability of rock faces and rock piles. Using differential radar interferometry, the system can detect deformation movements of a rough wall with submillimeter accuracy, and with high spatial and temporal resolution. Combining different technologies for better assessing slope stability on a mine by ian du toit, optron.
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. Pit slope monitoring is a vital concern for geotechnical engineering. In addition, the radar waves adequately penetrate through rain, dust and smoke to give reliable measurements, in realtime and twentyfour hours a day. Sar radar filetype pdf beginning with the launch of seasat in 1978, synthetic aperture radar sar satellites. A computerised slope monitoring and management is also carried out using the slope stability radar ssr. Center, left drill crew drilling with a cme 850 atv. The ssr is able to record displacements at over 3000 points on the slope at. Pdf case studies of slope stability radar used in open. Case studies of slope stability radar used in open. Section j dip, sheets 11 to 18 slope stability calculations. Section j dip, sheets 7 to 10 slope stability calculations.
Slope stability accidents are one of the leading causes of fatalities at u. Assessing and managing instability hazards is an essential activity when working with both unstable natural slopes and engineered slopes. This article provides an overview of the first fifty years of radar development at lincoln laboratory. In ssr technique, it is assumed that slope materials have elastoplastic. The outcome is the worlds largest scholarly graph with both bibliographic information, including citations, and full texts of academic papers for machine processing. 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 radar is assessed as a very suitable technique for monitoring slope stability. The ssr remotely scans rock slopes to continuously measure any surface. It is development on the radar technology, is now being widely used in several countries to provide real time monitoring and advance warning signals before any slope or dump failure in open cast mines. Click the video you like the most to see related choices. Slope stability radar how is slope stability radar abbreviated.
Since op is the procurer of slope stability monitoring services, the relevant product market in the instant case ostensibly would be a market of procurement of slope stability radar services. 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. Ge outline single micropiles stabilizing rock blocks single micropiles stabilizing infinite soil layer on rock awall cases general slope stabilization case closure the slope stability problem easy very hard rock. Jan 23, 2014 pit slope monitoring is a vital concern for geotechnical engineering. Selecting an appropriate time to exclude personnel or. Continue until you find a video you would like to watch. Powerful and userfriendly, the ibis guardian software manages slope stability risks in both geohazard assessment and open pit mining operations. Assessment of slope instability with effects of critical. A guide for practising mine surveyors huw gareth thomas a research report submitted to the faculty of engineering and the built environment, university of the witwatersrand, johannesburg, in partial fulfilment of the requirements for the degree of master of science in mining engineering. As the first slope stability radar ever developed, the ssrxt has now been in active service for over a decade, having undergone numerous improvements over that time.
Applications of groundbased radar to mine slope monitoring. It is very accurate as an indicator of zero movement, and performs within the speci. Simulation of a slope stability radar for opencast mining. The analyses for each case are described as follows.
The major factors making the bridge overturn are analyzed, and the preventive measures are given out. A precision instrument created to monitor the stability of rock walls in opencut mines is to be commercially launched in a hunter valley coal mine tomorrow. Groundprobe is a global technology leader that provides advanced hardware and software solutions to the mining industry. Tenders are invited online on the website from the eligible bidders having digital signature certificate dsc of class2 or class3 issued from any agency authorized by controller of certifying authority cca, govt. The advantage of the slope stability radar over other monitoring techniques is that it provides full area coverage without the need for mounted reflectors or equipment on the wall. Generally, issue of slope failure occurs at open cast mines due to undisciplined mining, impacts of weather conditions. Limit analysis and stability charts for 3d slope failures. Mines have an inherent risk of geotechnical failure in both rock excavations and tailings storage. Slope stability radar alarm threshold validation at telfer gold mine p saunders et al. Geomechanics, slope instability, monitoring, radars, slope failure. Also backfill is used in the cutandfill mining operation to provide working surface and for mucking ore, in open stoping method, from upper stopes 3 and 8.
The bearing capacity of the bridge is calculated under the condition of the bearings disengaging. Pdf predicting slope collapse using slope stability. Surface deformations, caused by mining activities at mine sites, are conventionally measured by using survey instruments. Reutech mining is a leading supplier of advanced geotechnical monitoring radar systems including the ssp ground penetrating radar focusing on mining safety. Slope stability analysis is performed to assess the safe design of a humanmade or natural slopes e. Slope stability evaluations by limit equilibrium and finite element methods trondheim, april 2006 thesis submitted to the faculty of engineering science and technology, norwegian university of science and technology in partial fulfilments of the requirements for the degree of. The limiting values are then reused with the slope profile being modified to include a repair using baled waste tires. Slope monitoring radar has emerged in the last ten years as a leadingedge tool. Core aggregating the worlds open access research papers. The first slope stability radar of groundprobe, australia, supplied and commissioned by ms.
Slope stability is the resistance of inclined surface to failure by sliding or collapsing. Slope stability radar technology the ground probe ssr is a technique for monitoring open pit mine walls based on differential interferometry using radar waves. At the time of writing, there is only one x band solid state pulse radar radome. In recognition of his years of guidance and support as a mentor and friend to geotechnical specialists in the northwest. Using differential radar interferometry, the system can detect deformation movements of a rough wall with submillimeter accuracy, and with high spatial and. Slope stability mining radar in mine slope stability monitoring at open cast mines. Groundprobe mining technology mining news and views. The objective of this section is to show how numerical models can be used to simulate the pit slope behavior and compute safety factors for typical field problems. Overview of radome radar technologies for waterborne applications. An early warning is required for safety of the miners.
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