Study of effect of bolt anchorage parameters on rock slope stability by. Stability rock slopes has a prominent influence in projects such as transportation routes and open pits. A slope stability problem in hong kong introduction. Rock slope stability analysis lec 1 linkedin slideshare. Pdf stability analysis of a rock slope in himalayas. Stability analysis of rock slopes using the finite element.
Allot of hard work and perseverance went into this. This book focuses on rock slope stability, with sections on geological data collection. Chapter 10 slope stability analysis nysdot geotechnical page 106 january 21, 2014 design manual 10. Slopes in mountainous regions require cohesion 8 undrained short term slope failure in clay.
Slope stability analysis of nkran pit at asanko gold mine, ghana. The slope strertgth is not merely a function of the strength of the rock constituents, but is limited primarily to the strength of the weakest structural feature andor lithologic member along which ground movement is unrestrained in the slope. Rules of thumb and easy method of estimating slope stability geology and soils information needed from site or soils database check appropriate loading conditions seeps, rapid drawdown, fluctuating water levels, flows select values to input for. Slope stability analysis wikimili, the best wikipedia reader. Fhwa nhi06088 6 slope stability soils and foundations volume i 6 3 december 2006 6. The assessment of slope stability and rock excavatability in a. The research work assessed the stability of rock slopes for optimum exploitation of limestone deposits at obajana in kogi state and ewekoro in ogun state. Whether youre involved in surface mine design or production, construction, education, or regulation, this is an important new book for your library. The ncgs is mapping bedrock and collecting rock slope stability data along the north carolina segment of the brp as part of a geologic inventory of the brp funded by the national park service. This book focuses on rock slope stability, with sections on geological data collection, geotechnical data collection and analysis, surface water and groundwater effects, kinematic and kinetic stability analysis, rock slope stabilization techniques, and rock slope instrumentation and monitoring.
Kliche, rock slope stability, sme, the society for mining, metallurgy, and. Slope failure develops when the slope stress exceeds the slope strength. Pdf study of effect of bolt anchorage parameters on rock slope. The generalized hoekbrown parameters of the slope rock mass are provided in table 1. Assessment of the stability of rock slopes by the slope. The geotechnical slope design of an open pit wall starts at the bench scale configuration. Kliche, 9780873353694, available at book depository with free delivery worldwide. Erik eberhardt university of british columbia geological engineeringearth and ocean sciences, ubc, 6339 stores rd. These are new pro duction sites with comparable geological formations along the southern part of the quarry where three planar failures were previously observed. Pdf rock slope stability assessment by using kinematic analysis. The stability of this particular slope was critical because it. Rock slope engineering civil engineering i am menglim.
The effect of length of rock bolts on the stability of. The fracture process when cutting inhomogeneous rocks 15. In addition to the socalled modified geological strength index, the proposed system considers five additional parameters whose relative effects on the stability of fractured rock slopes were. Pdf on jan 1, 2011, alavi nezhad khalil s v abad and others published rock slope stability assessment by using kinematic analysis and slope mass rating at bandar seri alam, johor find, read. In civil engineering, projects include transportation systems such as highways and railways, dams for power production and. The assessment of slope stability and rock excavatability. Benjamin paul geological engineering investigation of roc. Kliche 1999 defined slope stability as the resistance of any inclined surface, as the wall of an open pit or cut, to failure by sliding or collapsing. This engineer manual em provides guidance for analyzing the static stability of slopes of earth and rock fill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. Rock slope stability and the design of the appropriate slope angle are extremely important for surface mining in these difficult economic times. Geological mapping was carried out to measure the orientations of discontinuities.
The aim of this study is to evaluate the stability and excavatability of newly stripped rock slopes slope 1 sn1, slope 2 sn2, and slope 3 sn3 in a limestone quarry. Rock slope stability and the design of the appropriate slope angle is extremely important for surface mining in these difficult economic times. Rock slope stability analysis utilization of advanced. Rock slope stability of cliff end fault geology geology. Typical rock slope failures after kliche 1999 there are four general modes of slope failure. Low rock mass strength is characterized by circular raveling and rock fall instability like the formation of slope in massive sandstone restrict stability. The effect of spacing of rock bolts on the stability of. They are certainly major factors in cut slope stability and in. Charles kliche, society for mining, metallurgy, and exploration, inc sme. It took a year to complete this project but would have taken much less time if it wernt for other modules that needed to be completed. The slope stability analysis of rocks is vital for designing safe slopes in openpit mines. How does the slope angle play a role in slope stability.
Detailed pieziometric data at multiple locations and depths within and. The stability of rock slopes is controlled by the joint sets, characteristics of joint surface, and depth and steepness of the excavated slope face and its orientation with respect to the joint sets. How do friction and cohesion work together to stabilize slopes. In order to analyse discontinuity data we used georient program which is a stereographic plot. Probabilistic approach for open pit bench slope stability. Kinematic assessment of rock slope stability at obajana. The design engineer and the regulator must be familiar with the concepts to choose the best design at the lowest cost. The design of too flat of a highwall angle means considerable additional mining costs. Main termsvector search result for toppling failure 1. University of east london, 3rd year disseration project on the rock slope stability of cliff end, hastings.
Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. The rock materials forming a pit slope determines the rock mass strength modified by discontinuities, faulting, folding, old workings and weathering. The term landslide refers to a situation of instability affecting natural slopes and involving large volumes of soil. Rock slope stability analysis hardcover january 1, 1992 by gian paolo giani author see all formats and editions hide other formats and editions. This chapter deals with rock slope stability, a subject that has shown remarkable development in the last twenty years relative to methods for estimating shear strength of rock discontihuities and methods of analysis. Slide 23 freezethaw and icewedging may have been a contributing factor in this previous rockslide, reactivated on dec. Slope stability analyses include static and dynamic, analytical or empirical methods to evaluate the stability of earth and rockfill dams, embankments. Slope stability analysis geotechnical design manual m 4603 chapter 74 december 2006 slope stability analysis detailed assessment of the groundwater regime within and beneath the slope is also critical. Rock slope stability charles a kliche whether youre involved in surface mine design, surface mine production, construction, education, or regulation, this is an important book for your library. Chapters include geotechnical and geomechanical analysis techniques. Rock slope stability and the design of the appropriate slope angle. The probabalistic sara stability analysis for road access program is still under development. Rock slope stability of cliff end free download as pdf file.
The slope, which has a height of 10 m, is assumed loaded under gravity with a horizontal to vertical stress ratio of 1. Numerical methods have become very popular in recent years for stability analysis of rock slopes. Methods for analysis of slope stability are described and are illustrated by examples in the appendixes. Pdf rock slope stability assessment by using kinematic. It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability. In this paper a numerical analysis of slope stability problems in blocky rock is presented with emphasis given to the various possible failure modes block sliding andor block tilting. Slope design is concerned with the stability of unstable blocks of rock formed by joint sets. Pdf on mar 19, 20, gaurav tiwari and others published study of effect of bolt anchorage parameters on rock. At this scale, the rock slope stability is governed primarily by the geological discontinuities within the rock mass and as a result, structurallycontrolled failures e. Slope stability evaluation is executed to assess the. It describes the basic rock slope failure modes and methods of analysisboth kinematic and kinetic techniques. During blasting the explosion gases will force their way out of the rock mass via the karstic discontinuities rather than by breaking intact rock or by following discontinuities to the next. Rock slope stability download ebook pdf, epub, tuebl, mobi.
Rock slope stability analysis a variety of engineering activities require excavation of rock cuts. We illustrate the merits of the suggested approach on an example of a 10 m homogeneous rock slope with a 35. Slope stability accidents are one of the leading causes of fatalities at u. The term slope means a portion of the natural slope whose original profile has been modified by artificial interventions relevant with respect to stability. These analyses are often completed using slope stability charts and the dsara deterministic stability analysis for road access slope stability program. A comprehensive guide for mining and construction engineers responsible for rock slope stability. Given the lack of suitable systems in the characterization of slope stability of heavily jointed rock masses, a new rock mass classification system called slope stability rating ssr is proposed.
In kliches publication titled rock slope stability, robotic total stations and prisms for the monitoring of slope movement is addressed. The objective of the analysis was to evaluate and judge the condition and overall stability of the exposed rock, and identify where. Slope stability hazard assessment and mitigation 167 presence of these filled sinkholes during excavation, have an adverse effect on the slope stability. Rock slope stability analysis utilization of advanced numerical techniques dr. Symbol parameter dimensions f factor of safety against sliding along sheet joint calculated h height of the overall slope or of each bench 60 m or 20 m respectively. Rock slope stability kliche 1999 free download as pdf file. The geological engineering investigation of rock slopes are a very important fact for the. A proper slope design not only leads to improvements in slope stability and safety but also reduces costs, extends the life of mines and decreases the stripping ratio bye and bell, 2001, naghadehi et al. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology. The orientation data obtained were plotted on stereonets to determine pole concentration and major joint sets using dips 5. Stability analysis of a rock slope in himalayas article pdf available in geomechanics and engineering 22 june 2010 with 2,238 reads how we measure reads.
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