It always occurs in rock masses containing a group of dominant discontinuities dipping into the slope. The applicability of this criterion is suited to isotropic and homogeneous intact rock, or heavily jointed rock masses. The analysis is based on the popular block toppling method of goodman and bray first. Toppling rock slope failures examples of analysis and. Kinematic analysis is a method used to analyze the potential for the various modes of rock slope failures plane, wedge, toppling failures, that occur due to the presence of unfavorably oriented discontinuities. Pdf numerical analysis of slideheadtoppling failure. Analysis of toppling failure, however, has received relatively little attention. A modified stereographic projection approach and a free. Kinematic analysis is a method used to analyze the potential for the various modes of rock slope failures plane, wedge, toppling failures, that occur due to the presence of unfavorably oriented discontinuities figure 1. The 3 rd edition of the text book design analysis in rock mechanics by william g. The eight study sites were highly jointed, with variable block size and jointing pattern giving way to planar, wedge, and toppling mode failure. Dips is designed for the analysis of features related to the engineering analysis of rock structures, however, the free format of the dips data file permits the analysis of any orientationbased data. Aug 16, 2019 plane failure analysis calculates the factor of safety for plane failures in rock and soil slopes where defined discontinuity planes exist. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement.
These charts have been produced using the most recent version of the hoekbrown failure criterion. Rockpack iii rock slope stability software by rockware. Capabilities include computerized field data collection, stereonet analyses to identify possible failure types, safety factor calculations for potential failures, and design of rockbolt or cable support, to mention only a few. Toppling failure is one of the most common failure types in the field. Kinematic analyses of the discontinuities were carried out using dips software. Zika 1993 presented a forecast of the time of failure of a toppling rock. Rockpack iii is designed to support the user from data collection through geologic analysis by stereonets to safety factor calculations by limit equilibrium methods and finally to slope design and design of. A highwall failure at an open pit coal mine in western alberta, canada occurred on 9 july 2017. Toppling failure long thin rock columns formed by the steeply dipping discontinuities may rotate about a pivot point located at the lowest corner of the block. Up to date, the stereographic projection approach is still an indispensable tool for kinematic toppling failure analysis of rock slopes, since it is very convenient to perform kinematic analysis that is based on all discontinuity orientations, not just some representative values, and it visually shows the analysis results. The 2d limit equilibrium analysis of rock blocks, resting on a stepped. Considering a single rock block on an inclined surface subject to no external forces fig. It can be concluded that analyses of discontinuity orientation in relation to cut face direction in rock excavation is essential for mine planning to forestall mine accidents.
Rocscience has been creating easy to use, reliable geotechnical software since. Zika 1993 presented a forecast of the time of failure of a toppling rock tower failure on a slope edge, based on an extensive field study and on the longterm monitoring of the kinematics. New rock toppling software coming from rockscience. Toppling analysis of a precariously balanced rock pbr can provide insights into the nature of ground motion that has not occurred at that location in the past and, by extension, realistic constraints on peak ground motions for use in engineering design. In this study, an analytical solution is presented on the basis of limit equilibrium analysis. Toppling analysis of a precariously balanced rock pbr can provide insight into the nature of ground motion that has not occurred at that location in the past and, by extension, can constrain peak ground. Rocfall statistical analysis of rockfalls software. Rockfalls and rock slides pose dangers in mountainous areas that can be prevented with modern rockfall mitigation techniques that might involve rockfall. Name, name of institution, course name, name and email of your professor, link to your department website. Toppling analysis of precariously balanced rocks under. An analytical solution for block toppling failure of rock. Pdf probabilistic stability analysis of block toppling. Featured document using wettability to understand log response. Rockmass characterization for open pit slope design using.
Generally four types of failures exist in rock slopes namely plane wedge toppling and circular. It makes it easy to visualize the slope failure in 2d and interactive 3d, and displays the. Postearthquake investigation has shown that many toppling rock slope failures have occurred during earthquakes. Rocscience roctopple block flexural toppling analysis. Energy, velocity and bounce height envelopes for the entire slope are determined by the. Stability analysis of flexural toppling failure using the.
The analysis is based on the popular block toppling method of. Digital rock provides predictive insight to oil recovery. Rock slope stability in surface excavations, from planar block and wedge slides to rotational and toppling failures shaft and tunnel stability, ranging from naturally supported openings to analysis and design of artificial support and reinforcement systems. Postearthquake investigation has shown that many toppling rock slope failures have occurred during. It was also found that overall slope angle of 50 and bench slope of 60 were required to maintain stable pit slopes. A conventional instability of rock slopes in layer rock strata is flexural toppling, which occurs due to bending stresses. The first failure occurred in a 20 m high granite slope that was stabilized by removing the top 6 m and installing a number of tensioned rock anchors in the toe. Aug 26, 2014 rock slope stability in surface excavations, from planar block and wedge slides to rotational and toppling failures shaft and tunnel stability, ranging from naturally supported openings to analysis and design of artificial support and reinforcement systems. A probabilistic model for the analysis of the block toppling failure in rock slopes is described in the present paper.
In addition to performing kinematic analysis, dipanalyst 2. Determine joint sets, perform kinematic analysis of slope stability, and more in this multi. Pariseau completes the authors goal, stated in his first edition, of including a chapter on foundation engineering that. Our latest release of roctopple includes limit equilibrium block flexure toppling analysis making the program capable of tackling more complex rock toppling problems. Toppling analysis of a precariously balanced rock pbr can provide insight into the nature of ground motion that has not occurred at that location in the past and, by extension, can constrain peak ground motions for use in engineering design. Energy, velocity and bounce height envelopes for the entire slope are determined by the program, as is the location of rock endpoints. Stability charts for rock slopes based on the hoekbrown. Rock slope stability in surface excavations, from planar block and wedge slides to rotational and toppling failures shaft and tunnel stability, ranging from naturally supported openings to analysis and design of. Roctopple is an interactive program designed for performing toppling analysis and support design of rock slopes. Rock mass characterization information fracture orientations, stereonets, fracture spacing, fracture roughness, gsi, etc.
Study on instability criteria of topplingsliding collapse. Slope stability information factor of safety, probability of. It is developed for stereonetbased analysis as well as a new quantitative kinematic analysis. Rocdata is a versatile toolkit for the analysis of rock and soil strength data, and. Input the slope parameters, discontinuity spacing, dip angle and strength, and roctopple. Rockpack iii is applicable to practically all rock excavations, including highway roadcuts, quarries, mines, and building excavations. Dipanalyst free software package for kinematic analysis of. The application of goodman and brays limit equilibrium analysis of multiblock toppling failures to these three slopes is demonstrated. Rock slope engineering civil engineering i am menglim.
Which software is best suitable for rock slope stability. Rocfall is a statistical analysis program designed to assist with assessment of slopes at risk for rockfalls. Geological and geotechnical engineering software vendor rockscience, makers of dips, swedge, slide, examine3d and other products is entering beta testing for their newest product, roctopple to analyze. Rockpack iii is a package of programs useful for all phases of rock slope. Name, name of institution, course name, name and email of your professor, link to your. According to rockscience, roctopple will complete our suite of rock slope stability analysis software. Toppling analysis of the echo cliffs precariously balanced rock. Once the above information is received, you will receive a 3month registration which may or may not be renewed. Dips is our popular stereographic projection program for the analysis and presentation of orientation based data. A modified stereographic projection approach and a free software tool for kinematic analysis of rock slope toppling failures jun zheng, qing lu, jianhui deng, xiaojuan yang and xiang fan et al.
Kinematic analyses of different types of rock slope. Nov 28, 2018 toppling failure is one of the common instability modes of rock slopes. This paper introduces a monte carlo simulation procedure for the probabilistic analysis of block toppling and describes its implementation into a spreadsheetbased program rocktopple. Roctopple geotechnical design software slope stability. Dipanalyst free software package for kinematic analysis. Discontinuities are geologic breaks such as joints, faults, bedding planes, foliation, and shear zones that can potentially serve as failure planes. The analysis procedure considers both kinematic and kinetic probabilities of. The 2d limit equilibrium analysis of rock blocks, resting on a stepped failure surface is carried out including both a montecarlo simulation procedure and markov chains theory. The kinematic analysis option for rock slope stability analysis, allows the user to quickly and easily evaluate the potential for planar sliding, wedge sliding, flexural toppling and direct toppling failure modes. Mar 31, 2015 the outcome of this kind of analysis is used to determine the likelihood and the modes of failures yoon et al. Rockpack iii is a package of programs useful for all phases of rock slope analysis and design where stability is controlled by the orientations and characteristics of rock mass discontinuities joints, bedding, foliations, faults, etc. The analysis is based on the popular block toppling method of goodman and bray first published in a paper, toppling of rock slopes, in 1976. Geological and geotechnical engineering software vendor rockscience, makers of dips, swedge, slide, examine3d and other products is entering beta testing for their newest product, roctopple to analyze the rock toppling failure mode. This paper uses numerical limit analysis to produce stability charts for rock slopes.
Keyblock based analytical stability method for discontinuous. Roctopple is an interactive software tool for performing toppling analysis and support design of rock slopes. Toppling analysis of a precariously balanced rock pbr can provide insights into the nature of ground motion that has not occurred at that location in the past and, by extension, realistic constraints on. Jan 26, 2019 the different mode of rock failures identified from the kinematic analysis which was the sources of rockfall block under steep rock slope face. The stability analysis of flexural toppling failure has been studied vastly. Rockpack iii is designed to support the user from data collection through geologic analysis by stereonets to safety factor calculations by limit equilibrium methods and finally to slope design and design of artificial support if required. Roctopple is a versatile rock slope software designed to perform toppling analysis and support design of rock slopes based on the block toppling method of. The quantitative kinematic analysis, instead of relying on representative values, considers all discontinuities and their. Yonathan admassu from kent state university ashtabula has released a free rock slope stability software package for kinematic analysis of planar, wedge and toppling modes of failure. A view of the slope analyzed may be saved as a bitmap with a summary printed alongside. Rockit is a hosted technology and services solution, so there is no need to worry about installing software and managing periodic updates. It makes it easy to visualize the slope failure in 2d and interactive 3d, and displays the potential failure mode of individual blocks toppling, sliding, stable as well as the overall safety factor. Input the slope parameters, discontinuity spacing, dip angle and strength, and roctopple automatically generates the toppling blocks.
This study introduces a simplified semidistinct element algorithm for discontinuous rock slopes under toppling instability assessment based on block. Rock slope stability analysis utilization of advanced. Roctopple latest version get best windows software. New rock toppling software coming from rockscience geological and geotechnical engineering software vendor rockscience, makers of dips, swedge, slide, examine3d and other products is entering beta testing for their newest product, roctopple to analyze the rock toppling failure mode. Radar monitoring successfully identified this second.
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