Wyniki wyszukiwania - Biblioteka Nauki

1

Analiza przebiegu procesów osuwiskowych w oparciu o procedurę "automatic rezoning" w programie FLAC v. 6.0

100%

Cała M. , Kowalski M. , Betlej M.

Górnictwo i Geoinżynieria

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2009

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tom R. 33, z. 1

85-94

PL

W artykule przedstawiono możliwość wykorzystania funkcji automatic rezoning do analizy przebiegu procesów osuwiskowych skarp i zboczy. Klasyczna analiza stateczności skarp ogranicza się do określenia wskaźnika stateczności oraz potencjalnej powierzchni poślizgu bryły osuwiskowej, nie mówi natomiast nic o samym przebiegu procesu ani o ostatecznej geometrii ustabilizowanego osuwiska. Aby przeanalizować przebieg osuwiska należy przeprowadzić obliczenia w trybie dużych odkształceń, co pociąga za sobą znaczne deformacje siatki, uniemożliwiające po pewnym czasie kontynuowanie obliczeń, ze względu na złą geometrię stref. Aby obliczenia mogły być kontynuowane należy przeprowadzić odwzorowanie (remaping) pewnych wielkości modelu (jak naprężenia, prędkości, przemieszczenia i in.) z siatki zdeformowanej na nową, bardziej regularną siatkę. Wykonanie serii takich odwzorowań w ciągłym procesie obliczeniowym, w pewnych warunkach może pozwolić na pełną analizę procesu osuwiskowego, co przedstawiono w niniejszym artykule na wybranych przykładach.

EN

This paper shows the possibilities of using automatic rezoning function for analysis of evolution of landslide process in slope. Conventional slope stability analysis produces only the value of factor of safety and it's restricted potential failure surface location. The landslide evolution process or final geometry of stabilized landslide are not concerned. In order to analyse evolution of landslide, the large strain mode should be applied. That results in large distortions of grid. It doesn't allow problem solving after some cycles due to bad zone geometry. In order to continue solving, some actual parameters like stresses, velocities, displacements etc. must be remapped to form old distorted grid into new, more regular one. After series of these remaps, in continuous solving process, full evolution of landslide process may investigated, what was shown in this paper on chosen examples.

2

Optymalizacja szerokości pasów ochronnych przy odkrywkowej eksploatacji kopalin pospolitych

100%

Batog A. , Hawrysz M.

Górnictwo i Geoinżynieria

|

2009

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tom R. 33, z. 1

57-64

PL

W artykule przedstawiono przykłady optymalizacji szerokości pasów ochronnych dla niektórych obiektów inżynierskich zlokalizowanych w sąsiedztwie wyrobisk odkrywkowych kopalń kruszyw budowlanych. W przypadku niektórych z tych obiektów np. linii energetycznych, masztów telekomunikacyjnych wskazano, iż technicznie możliwe jest udostępnienie do eksploatacji uwięzionego w filarze ochronnym części złoża z zachowaniem stateczności zarówno chronionych obiektów jak i zbocza końcowego wyrobiska. Przedstawiony problem jest szczególnie istotny dla kopalń odkrywkowych, w których złoża eksploatowanych kruszyw wyczerpują się.

EN

The paper presents the examples of protection area width optimization for the open pit mines for some engineering structures situated in contiguity of the open pit. The possibility of deposit exploitation from the part of protective pillars of power lines and aerial masts was demonstrated. The slope stability during exploitation and at final stage of open pit will be retained. The presented problem is particularly essential for the sand and gravel pits, which deposits are becoming exhausted.

3

Stability of road earth structures in the complex and complicated ground conditions

100%

Batog A. , Stilger-Szydło E.

Studia Geotechnica et Mechanica

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2018

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tom Vol. 40, nr 4

300--312

EN

Some important modern problems of the transport engineering, which occur in the newly built and modernised road objects, have been indicated in the work. A discussion was conducted regarding the methods of assessing the stability of slopes of the road embankments, the obtained stability margins and the interpretation of obtained results in the specific cases of foundations of the road earth structures. Presented observations result from analysing the stability assessments of slopes of the road embankments, which was conducted on many communication objects, characterised by high variability of foundation conditions.

4

Warunki rozprzestrzeniania się osuwiska zagrażającego budynkowi mieszkalnemu

100%

Mazurek J. , Cała M.

Górnictwo i Geoinżynieria

|

2011

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tom R. 35, z. 2

433-440

PL

Wiosną 2010 r. po okresie obfitych opadów deszczu, w terenie o kącie nachylenia około 140 dotychczas stabilnym i bezpiecznym powstało osuwisko. W artykule zamieszczono opis powstałego osuwiska, wyniki wierceń i sondowań, badań własności gruntów oraz wyniki analiz stateczności. Określono warunki w jakich osuwisko powstałe pomiędzy dwoma innymi, nieczynnymi do wiosny 2010 r., może się rozprzestrzeniać stwarzając zagrożenie dla domu mieszkalnego.

EN

In spring of 2010, landslide occurred due to unusual rain falls. It happened on the terrain of inclination of 14 degrees, stable and safe before. This paper presents the description of landslide, results of drills and probe testing, investigations of soil properties and slope stability analysis. The landslide occurred between two others - stable till spring 2010. The conditions of landslide expansion affecting habitable house were also formulated.

5

Analysis of the behaviour of the high and steep slope of a road made through waste under the influence of rainfall

100%

Pilecka E. , Zięba J. , Szwarkowski D. , Pilecka E. , Zięba J. , Szwarkowski D.

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tom 67

|

nr 2

6

Determination of limits to which surface mines can approach urban areas by means of computer-aided slope stability analysis

100%

Nasuf E. , Eren R. , Ozbakir O. , Avsar S.

Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej. Konferencje

|

1998

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tom Vol. 82, nr 21

246-254

EN

Open pit coal mines of quarries may sometimes come very closed to urban and create environmental problems. In this paper such a case is studied and presented. Milten Coal Mining Company is one of the biggest coal companies which supply coal to the Istanbul metropolitan area. The Company has an environmental problem because the coal mine has come very close to a nearby village and slope failure has occurred posing a danger to this village. Approaching the village without causing any instability has become very important for the mine. In this paper, the slope failure which occurred in Milten Coal mining Company of Istanbul is investigated and limits to which the mine can approach the urban areas are determined using the GALENA slope stability analysis software. Different stability and restraining methods are analysed in order to determine the areas where mining is economically feasible. As result, a very small part of the mine has been found to be minable due the geomechanical properties and the geology of the area.

PL

Odkrywkowe kopalnie węgla lub kamieniołomy często podchodzą bardzo blisko do obszarów miejskich i stwarzają zagrożenia dla środowiska. Referat przedstawia i omawia taki przypadek. Milten Coal mining Company jest jedną z największych spółek węglowych zaopatrującą metropolię Istambuł w węgiel. Ma ona do rozwiązania problem związany z ochroną środowiska, który wziął się stąd, że kopalnia bardzo zbliżyła się do pobliskiej wsi i nastąpił zsuw skarpy, zagrażający tej wsi. Zbliżanie się kopalni do wsi, które nie spowodowały niestabilności stało się istotną sprawą dla kopalni. W referacie przedstawiono analizę zsuwu skarpy, który nastąpiło w Istambułskiej Milten Coal Mining Company i za pomocą oprogramowania GALENA do analizy stabilności skarpy ustalono granice do jakich kopalnia może zbliżyć się do obszaru miejskiego. Rozważono różne metody stabilizacji utwierdzania w celu wyznaczenia obszarów opłacanej eksploatacji górniczej. Okazało się, że bardzo mała część kopalni nadaje się do eksploatacji z powodu własności geomechanicznych i geologicznych tego rejonu.

7

Importance of seismic wave frequency in FEM-based dynamic stress and displacement calculations of the earth slope

100%

Fuławka K. , Kwietniak A. , Lay V. , Jaśkiewicz-Proć I.

Studia Geotechnica et Mechanica

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2022

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tom Vol. 44, nr 1

82--96

EN

Reliable assessment of earthen dams' stability and tailing storage facilities widely used in the mining industry is challenging, particularly under seismic load conditions. In this paper, we propose to take into account the effect of the dominant frequency of seismic load on the stability assessment of tailing/earthen dams. The calculations are performed by finite element modelling (FEM) with the Mohr–Coulomb failure criteria. To separate the frequency content from other dynamic parameters describing the seismic wave, synthetic waveforms with identical amplitude and attenuation characteristics, but differing spectral characteristics have been used. The analysis has been performed for three different slope angles and two scenarios of seismic wave propagation. Consequently, the changes of total displacement and shear stresses depending on the frequencies have been determined and clearly show that lower frequencies cause higher stress levels and displacement. Finally, the response surface methodology has been applied to determine how different parameters affect the slope stability under dynamic load conditions. Overall, this study is a first step to improve the existing methods to assess slope stability when considering seismic load.

8

Application of Electrical Resistivity Tomography (ERT)in the investigation of quaternary landslide zones, based on the selected regions of Płock slope

100%

Kaczmarek Ł. , Mieszkowski R. , Kołpaczyński M. , Pacanowski G.

Studia Quaternaria

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2014

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tom Vol. 31, Nr 2

101--107

EN

The article shows the results of geophysical surveys performed by using Electrical Resistivity Tomography (ERT) method on selected ragion of Płock slope of a Tumski hill near Basilica of Assumption of the Blessed Virgin Mary in Płock and in Maszewo by the Vistula River a few kilometers north of Płock. The above-mentioned sections were selected due to landslide phenomena observed there. Geophysical surveys were conducted in order to verify the state of the distribution of electrical resistivity in the sectors where mass movement was identified. The electrofusion crosssection near Cathedral Basilica shows clays and sands. Also in ERT prospection a zone of loose soils with high resistance is clearly visible. The results of the ERT method from Maszewo, indicates historical land surface of a landslide and that the slope in Maszewo consists of cohesive deposits. In order to describe these particular issues, geological cross-sections and safety factor obtained by calculation are presented for the analyzed parts of the slope. The safety factor shows that probability of landslide activity near Cathedral Basilica is very unlikely and in Maszewo is very high.

9

A study of the slope stability in unsaturated marly clay soil

100%

Jamei M. , Guiras H. , Ben Hamouda K. B. , Hatira M. , Olivella S.

Studia Geotechnica et Mechanica

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2008

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tom Vol. 30, nr 1-2

95-106

EN

The analysis of some experimental field data on an unsaturated unstable slope made of a marly clay soil showed that the swelling and collapse phenomena gave rise to the landslide problem. In the case studied, field investigation data and laboratory tests based on determining the water retention curve were analysed. The recorded pore-water pressure field helped us to identify the hydrological conditions. In fact, wet and dry cycles involve a total suction and saturation changes. To predict the shallow slope failure, a constitutive model taking into account the suction effect as well as its dependence on the degree of saturation is proposed. It is especially remarkable that the collapse phenomenon is well reproduced when the model incorporates suction changes and saturated and unsaturated preconsolidation stresses. The analysis of the slope failure, based on the field data and on the theoretical study, shows the hydraulic and mechanical effects.

10

Zagadnienie obliczania stateczności stoków w odkrywkach górniczych

100%

Sozański J.

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2019

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tom R. 60, nr 4

32--49

PL

Z okazji Jubileuszu 60 – lecia czasopisma „Górnictwo Odkrywkowe” („Surface Mining”) prezentacja reprodukcji artykułu zamieszczonego w numerze 1 w 1959 r. Biuletynu Techniczno - Ekonomicznego „Węgiel Brunatny”.

EN

On the occasion of the 60th anniversary of the „Górnictwo Odkrywkowe” („Surface Mining”) periodical, here is a presentation of the reproduction of the article published in issue 1 of the „Węgiel Brunatny”(„Lignite”) Technical and Economic Bulletin 1959.

11

Convex and concave slope stability analyses with numerical methods

100%

Cała M.

Archives of Mining Sciences

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2007

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tom Vol. 52, no 1

75-89

EN

This paper deals with the stability of convex and concave slopes. These types of slopes can be often found in the open pit mines. Two dimensionallimit equilibrium methods are usually applied for slope stability analysis. Limit equilibrium methods extended to three dimensions are used occasionally. The stability of spatial columns (instead of slices) is analysed in these cases. This paper shows the possibility of application of three and two-dimensional numerical calculations for stability analysis of concave and convex slopes. The shear strength reduction method was used to calculate the value of safety factor. The results of calculations with shear strength reduction method were compared with ones obtained from limit equilibrium methods. The considerations presented below allow formulating the conclusion, that proper two dimensional slope stability analyses are impossible for many cases. It's necessary to perform a three dimensional numerical calculations, which allow to model spatial geometry and complex geology of any slope.

PL

W niniejszej pracy zajęto się analizą stateczności zboczy zakrzywionych. Z tego rodzaju zboczami (wklęsłymi lub wypukłymi) mamy często do czynienia w kopalniach odkrywkowych. Z reguły do analiz stateczności zboczy wykorzystuje się metody równowagi granicznej w płaskich przekrojach. Sporadycznie na świecie stosuje się metody równowagi granicznej rozszerzone do trzech wymiarów. Rozpatruje się wówczas stateczność nie płaskich bloków lecz przestrzennych kolumn. W poniższej pracy pokazano możliwości zastosowania przestrzennych i płaskich obliczeń numerycznych do analiz stateczności zboczy zakrzywionych. Wykorzystano w tym celu metodę redukcji wytrzymałości na ścinanie (SSR). Pozwala ona na określenie wartości minimalnego wskaźnika stateczności dla dowolnego zbocza. Przeprowadzono krytyczną analizę porównawczą obliczeń z zastosowaniem metod równowagi granicznej i metod numerycznych. Na ogół uważa się, że prowadzenie obliczeń w różnych przekrojach płaskich daje w efekcie rozsądne wyniki analiz sytuacji przestrzennych. Należy jednakże zauważyć, że w pewnych przypadkach zachodzi konieczność wykonania przestrzennych analiz ze względu na geometrię zbocza oraz budowę geologiczną. Analizy stateczności w płaskich przekrojach często prowadzą do zbytniego upraszczania problemu. Widać także, że wartości wskaźników stateczności (FS) uzyskane za pomocą przestrzennych (3D) metod numerycznych są znacznie niższe od wartości uzyskanych z metod równowagi granicznej (LEM). Przedstawione poniżej rozważania potwierdzają fakt, że w wielu przypadkach przeprowadzenie prawidłowej analizy stateczności zboczy na drodze klasycznych obliczeń dwuwymiarowych (20) jest niemożliwe. Konieczna jest budowa przestrzennych modeli numerycznych, które pozwalają na w miarę wierne odtworzenie budowy geologicznej rozpatrywanego zbocza. Następnym krokiem jest przeprowadzenie obliczeń z wykorzystaniem SSR dla identyfikacji możliwych powierzchni poślizgu. Jak widać z przytoczonych przykładów, wyniki obliczeń numerycznych mogą się znacząco różnić od wyników uzyskanych z metod równowagi granicznej zaadoptowanych w 3D. Wyniki obliczeń numerycznych wskazują jednoznacznie, iż wartość wskaźnika stateczności zboczy wklęsłych i wypukłych jest większa niż w przypadku zboczy analizowanych w płaskim stanie odkształcenia. Dla analizowanych zboczy wklęsłych wartość FS jest istotnie wyższa (o 0.1) od przypadku w płaskim stanie odkształcenia (PS) dla promienia około 5-krotnie większego od wysokości zbocza. Dla rozpatrywanych zboczy wypukłych istotny wzrost FS występuje tylko przy małych wartościach promienia oscylujących około 0.6 H. Można zatem stwierdzić że w przypadku zboczy wypukłych wzrost ten jest stosunkowo niewielki.

12

Numeryczna analiza stateczności skarp podczas wykonywania wykopu w gruntach zaburzonych glacitektonicznie

100%

Szajna W. S.

Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski

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2007

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tom nr 134 (14)

167-177

PL

W pracy przedstawiono zastosowanie metody elementów skończonych do analizy stateczności zboczy jako alternatywę w stosunku do tradycyjnych metod równowagi granicznej. Przyjęto sprężysto-plastyczny model konstytutywny gruntu. Przy takim podejściu powierzchnia poślizgu tworzy się samoczynnie w tych obszarach gdzie naprężenia styczne przekraczają wytrzymałość gruntu na ścinanie. Ta zaleta jest szczególnie widoczna w przypadkach skomplikowanego układu warstw gruntu np. w gruntach zaburzonych glacitektonicznie. W pracy zamieszczono symulację zachowania zboczy podczas wykonywania wykopu.

EN

The paper presents an application of the finite element method for slope stability analysis as an alternative to traditional methods of limit equilibrium. An elasto-plastic constitutive model of soil is taken into account. Slope failure produced by finite element approach occurs naturally in the zones where shear stresses exceeds shear strength of the soil. The benefits of the method are especially visible in the cases of a complicated arrangement of soil layers e.g. in glacitectonically deformed soils. A simulation of the slope behavior during an excavation process is presented.

13

Precipitation amounts triggering landslide processes in the western part of the Nałęczów Plateau (Lublin Upland, Poland)

88%

Demczuk P. , Zydroń T. , Szafran T.

|

tom 41

|

nr 3

33-51

EN

This study covers the western part of Poland’s loess Nałęczów Plateau (Kazimierz Dolny, Zbędowice). Mass movements in the Lublin Upland occur during periods of increased precipitation or after a snowy and cold winter. To date, there are no comprehensive studies on active (precipitation, hydrology, vegetation, land use, anthropogenic factors) or passive factors (lithology, slope angle) causing such geohazards in this region. This area’s formations are characterised by high sensitivity to even small changes in moisture content; thus, their geotechnical parameters deteriorate as a result of precipitation or rising groundwater levels. The calculations in this study were chosen to determine the time necessary for ground response to external factors, in addition to determining the impact of these factors on decreases in the factor of safety (FS). Based on calculations in GeoStudio software, the impacts of rainfall totals and duration on slope failure, interpreted as an event where the FS falls below 1.0, were analysed. Accordingly, the threshold rainfall value was determined as the total rainfall at the time of slope failure. The study’s results indicate that loess covers are characterised by average water permeability, relatively high internal friction angles and low cohesion, which, combined with high slope inclination, favour landslide formation even when the slope is only partially saturated. The most unfavourable stability conditions occur at the beginning of spring, indicating that loess stability is significantly affected by snowmelt and precipitation at the beginning of the vegetation season, as well as the occurrence of episodic intense precipitation during the summer.

14

Numerical and experimental modelling of slope stability and seepage water of earthfill dam

88%

El-Hazek A. N. , Abdel-Mageed N. B. , Hadid M. H.

Journal of Water and Land Development

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2020

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tom no. 44

55--64

EN

In this paper, finite element modelling is employed for simulating and analysing seepage and slope stability of earthfill dam via GeoStudio software. Two products are employed, which are SLOPE/W for slope stability and SEEP/W for seepage analysis. The behaviour of earthfill dam with four different types of sandy soils having different values of hydraulic conductivity (K) has been studied. Different upstream (US) slopes of 1:2, 1:2.5, 1:3 and 1:3.5 for the earthfill dam are simulated. The downstream (DS) slope is constant at 1:2. The results showed for all the four types of soils that when the US slope is increased, the amount of seepage from the dam increases and the factor of safety (F) decreases. For each US slope, when K (type of soil) increases, both seepage and F increase. Fine sand soil is associated with less seepage and less F. Sixteen equations are obtained to predict both seepage and F with respect to US slope for each type of soil and K of the soil for US slope. An experimental model for earthfill dam is constructed in the laboratory of hydraulics, Benha University to investigate the seepage of water through earthfill dams. It is concluded that seepage decreased when K decreased, and when the US slope for each type of soil decreased. The seepage increased when K increased for each US slope. Seven equations are obtained to predict seepage with respect to US slope for each type of soil, and K for each US slope.

15

Back analysis in geotechnics : examples of shape determination

88%

Srokosz P.

Foundations of Civil and Environmental Engineering

|

2008

|

tom No. 12

87-99

EN

The following paper deals with some general aspects of inverse and back analysis techniques, which are commonly used in science and engineering. Lots of problems encountered in the investigation processes need inversion of standard seeking procedures. Such situations force researchers to work out an inverse problem using different kinds of back and inverse techniques. In the paper a few examples of back analysed problems concerning geometry evaluation have been presented.

16

Assessment of the Influence of Mountain Flood Control Reservoir Operation on the Floodplain Stability During an Extreme Flood

88%

Velychko S. , Dupliak O.

Ecological Engineering & Environmental Technology

|

2021

|

tom Vol. 22, iss. 1

31--38

EN

Construction of Mountain Flood Control Reservoir is an effective method of flood protection on mountain rivers. The Flood Control Reservoir works under the extreme condition of rapid water level rising and falling. The regime of intensive water level change affects the floodplain stability. Simulation of water penetration into the depth of soil, formation of the seepage curve under transient conditions during water rising and falling was carried out by Midas GTS NX software. A slope stability analysis was conducted for the floodplain of the Irshava River, flood of 1% probability (return period of 100 years) was assumed. Numerous simulations showed that the influence of the mechanical and hydraulic properties of the soil depends on the slope angle. The stability of the floodplain slope depends on the cohesion and hydraulic conductivity for steep slopes greater than 26°; if the slope is less than 26°, the stability is considerably dependent on cohesion, and the hydraulic conductivity practically has no influence. Thus, floodplain with the angle greater than 26°, additional geological surveys are required to determine the soil composition, mechanical and hydraulic properties for each layer. For the slopes lesser than 26° it is sufficient to determine the mechanical and hydraulic properties for the engineering and geological elements of soil, according to the national building regulations. Numerical simulation allows reducing the total volume of geological survey by minimizing survey of the slopes with an angle of less than 26°, which is 30% of the floodplain perimeter. The slope stability analysis showed that the slopes with the angle greater than 26° require stabilization structures in the lower part of floodplain before the Mountain Flood Control Reservoir construction.

17

The Influence of Slope Geometry on its Stability: Spatial and Plane Analysis

88%

Zabuski L.

Archives of Hydro-Engineering and Environmental Mechanics

|

2018

|

tom Vol. 65, nr 4

243--254

EN

The paper presents the results of numerical calculations of the stability and deformation process of several idealized slopes performed by the elasto-plastic finite difference method, using the commercial codes FLAC3D and FLAC2D. The results of 3D analysis of these slopes are compared with those obtained by the 2D method. The behaviour of slopes of different shapes and inclinations was analyzed. The calculations were carried out for flat, concave and convex slopes inclined at 30°, 45° and 60°, taking into account the influence of the lateral constraints of the slope. Two variants of the medium were analysed, i.e. the mass with no friction and with no cohesion. A comparison of 3D calculation results with those obtained by the 2D limit equilibrium analysis indicates that the 3D approach produces almost always higher safety factors than does the 2D method.

18

Locating critical circular and unconstrained failure surface in slope stability analysis with tailored genetic algorithm

88%

Pasik T. , van der Meij R.

Studia Geotechnica et Mechanica

|

2017

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tom Vol. 39, nr 4

87--98

EN

This article presents an efficient search method for representative circular and unconstrained slip surfaces with the use of the tailored genetic algorithm. Searches for unconstrained slip planes with rigid equilibrium methods are yet uncommon in engineering practice, and little publications regarding truly free slip planes exist. The proposed method presents an effective procedure being the result of the right combination of initial population type, selection, crossover and mutation method. The procedure needs little computational effort to find the optimum, unconstrained slip plane. The methodology described in this paper is implemented using Mathematica. The implementation, along with further explanations, is fully presented so the results can be reproduced. Sample slope stability calculations are performed for four cases, along with a detailed result interpretation. Two cases are compared with analyses described in earlier publications. The remaining two are practical cases of slope stability analyses of dikes in Netherlands. These four cases show the benefits of analyzing slope stability with a rigid equilibrium method combined with a genetic algorithm. The paper concludes by describing possibilities and limitations of using the genetic algorithm in the context of the slope stability problem.

19

Stability analysis of jointed rock slopes using geomechanical, kinematical, and limit equilibrium methods: the Chouf Amar career, M'Sila, NE Algeria

88%

Farid Z. , Riheb H. , Karim Z. , Younes G. , Rania B. , Aniss M.

Mining Science

|

2019

|

tom Vol. 26

21--36

EN

Many open-cast mines in Algeria are regularly affected by instabilities that disrupt the exploitation activity, such as Chouf Amar's career where recurrent failures are caused by the combined action of a number of predisposition and triggering factors. I this study we uses a commbined-Geomechanical, Kinematical, numerical and limit equilibrium analysis to evaluate the behaviour of the discontinuous rock masses in open pit mine, and we chooses the Chouf Amar career as a case study. We determines nine main sets of discontinuities in the three main facies of the stone-pit. We proved also that the quarry suffers from various types of failures and that blasting declines the values of safety factor. We find out the causes of the 2009 slip-incident. By this combined approaches we have made it possible to optimize operations and to improve career productivity while ensuring the safety of equipment and personnel.

20

Stability estimation of slopes having their slip surface determined by means of the STAB-3D method based on sliding body equilibrium analysis

88%

Ukleja J.

Geological Quarterly

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2016

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tom Vol. 60, No. 3

597--609

EN

Most of the three-dimensional analyses of landslides are based on simple 2D methods analysing chosen characteristic flat sections of the analysed sliding body. Assumptions of the method of flat limit equilibrium analysis for a spatial solution have been elaborated. This is a combination of 2D analysis of flat sectional views and 3D analysis of the landslide’s sliding body, which disregards any stress that does not affect equilibrium. It is assumed, however, to apply only when dealing with structural slope failure (i.e. when the soil layers have the predisposition to shape the determined slip surface with a consistent decrease and explicit slide direction). This can also apply when examining the stability of a scarp or slope for the layered soil of potential slip surfaces and slide direction to be defined. The basic assumptions, equilibrium equations, and practical usage of the method have been described for an exemplary landslide. This method allows one to define in a straightforward manner the stability of slopes, to plan a way of preventing potential landslides, and to control those that have already arisen.