Velocity-based method for slope failure detection

by Gordon H. Dechman

Publisher: Dept. of the Interior, Bureau of Mines in Washington

Written in English
Published: Pages: 19 Downloads: 757
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Subjects:

  • Slopes (Soil mechanics),
  • Strip mining.,
  • Landslides.

Edition Notes

Bibliography: p. 12.

Statementby Gordon H. Dechman and Martin S. Oudenhoven ; Denver Mining Research Center.
SeriesReport of investigations - Bureau of Mines ; 8194, Report of investigations (United States. Bureau of Mines) -- 8194.
ContributionsOudenhoven, Martin S., United States. Bureau of Mines.
The Physical Object
Pagination[3], 19 p. :
Number of Pages19
ID Numbers
Open LibraryOL15213292M

Slope and intercept of an analytical method The term patient demographics refers to which type of information that is entered into a laboratory information system? Patient-specific information, for example, name, age, and date of birth. Accurate systolic-peak detection is an important first step for the analysis of heart rate variability. Algorithms based on local maxima-minima, first-derivative, and slope sum are evaluated, and a new algorithm is introduced to improve the detection by: One major technique is known as envelope detection. The simplest form of envelope detector is the diode detector that consists of a diode connected between the input and output of the circuit, with a resistor and capacitor in parallel from the output of the circuit to the ground to form a low pass filter. If the resistor and capacitor are correctly chosen, the output of this circuit will be a nearly identical voltage-shifted . potential failure surface. Static slope stability analysis is done by Bishop’s simplified method and Dynamic slope stability analysis is done by time history method. The consequences of these problems were the dams performed reasonably in spite of being shaken by free-field horizontal peak ground acceleration (PGA) as high as Size: KB.

The North Slope of Alaska has been the primary target for oil production in the state since Although the deep sedimentary formations (such as the Kekiktuk, Lisburne, Ivishak, Sag River, and Kuparuk Formations) have served as major hydrocarbon-producing reservoirs, the volume of the remaining hydrocarbon in them in the existing oil fields is significantly lower now . The slope stability probability classification (SSPC) system is a rock mass classification system for slope engineering and slope stability assessment. The system is a three-step classification: ‘exposure’, ‘reference’, and ‘slope’ rock mass classification with conversion factors between the three steps depending on existing and future weathering and damage due to method . * From Helsel D.R. and R.M. Hirsch. Statistical Methods in Water Resources. Techniques of Water-Resources Investigations of the USGS Book 4. Chapter A3 p •Verify and document that all assumptions have been tested and met. Failure to do so, may lead to misleading results •The easiest test to do, OLS regression, is usually not File Size: KB. Slope detector The slope detection is a method of FM-demodulation which converts the received FM signal to AM and demodulates with an envelope detector. Principle Any circuit that outputs the time derivative of the input can perform FM to AM conversion. In an FM signal the frequency is low, when the amplitude of the message signal is low and.

Start studying Chemistry Ch 3,4,5 & 6 -MLS. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Park Slope Outlet Shipping Rates. Shipping rates depend on the selected shipping speed and weight/size of the items. To determine the applicable shipping rate for items in your Cart: Select Proceed to Checkout; Select or add your shipping address; Select a shipping speed and select Continue; Select a payment method and select Continue. Slope movements, including types of landslides and extremely slow soil creep (Varnes, ), occur throughout the United States and within many national collection of vital signs of regional landslide information, referred to as monitoring, is not only scientifically useful, but is beneficial for assessment of landslide hazards and risk, which is in turn important for regional. A time-domain reflectometer (TDR) is an electronic instrument used to determine the characteristics of electrical lines by observing reflected waveforms.. It can be used to characterize and locate faults in metallic cables (for example, twisted pair wire or coaxial cable). It can also be used to locate discontinuities in a connector, printed circuit board, or any other electrical path.

Velocity-based method for slope failure detection by Gordon H. Dechman Download PDF EPUB FB2

Velocity-based method for slope failure detection. Washington: Dept. of the Interior, Bureau of Mines, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Gordon H Dechman; Martin S Oudenhoven; United States.

Bureau of Mines. This report presents the concept, design, and testing of a sonic velocity monitoring system for the early detection Velocity-based method for slope failure detection book slope failure in open pit mines.

The heart of the system is a device for producing reproducible sonic signals in rock. YM Cheng has an interest in research work in slope stability: unification of 2D methods, location of critical 2D failure surfaces, 3D slope stability analysis, location of critical 3D failure surfaces, development of slope stability software SLOPE and SLOPE3D, unification of lateral earth pressure and slope stability problems, convergence problems in slope stability Cited by: 1.

Velocity-based method for slope failure detection / By Gordon H. Dechman and joint author. Martin S. (Martin Samuel) Oudenhoven. Velocity-based method for slope failure detection book Abstract. Includes bibliographical references (p. 12).Mode of access: Internet.

Pourkhosravani & Kalantari () summarized in their work some of the current methods for slope failure detection, which were grouped into Limit Equilibrium (LE) methods.

The Spencer method of slope stability analysis was incorporated into dynamic programming to predict the time of a slope failure and the shape of the failure surface. The data obtained from the numerical simulation results were compared with the experimental data obtained from Regmi et al.

() for by: 5. Prediction of time to slope failure: a general framework aim, the help offered by slope monitoring methods (e.g., Fukuoka M () Detection, exploration and monitoring for.

The limit equilibrium method is the most common approach for analyzing slope stability in both two and three dimensions. This method identifies potential failure mechanisms and derives factors of safety for a particular geotechnical situation.

It is an appropriate choice for assessing the stability of retaining walls. 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 Limit-State:GEO.

It also highlights some of the differences in approach to that adopted by the limit equilibrium method of Size: KB. Hunt Classification of Slope Failure 11 Methods of Slope Protection 26 Partial Listing of Procedures for Analyzing Slope Stability Using Method of Slices 32 Summary and Assumption for Various Method 33 Characteristic of the Commonly Used Method of slices 34 Modified Recommended FOS for New Slope 39 FOS of Each Method File Size: 1MB.

Bray (). According to the Markland’s test, a plane failure is likely to occur when a discontinuity dips in the same direction (within ) as the slope face, at an angle gentler than the slope angle but greater than the friction angle along the failure File Size: KB. A benchmark slope is reanalyzed and conclusions reached about their suitability for meaningful and conservative prediction of slope reliability.

Keywords: First Order Reliability Method, Finite element method, Probability of failure, Spatial correlation. Introduction Slope stability analysis is a branch of geotechnical engineering that is highlyCited by: 5.

Later on, displacement rate was calculated using the data filtering method, Eq. under n= ( min), as in Fig. 4b, and displacement rates in the pre-failure range were – As a general rule of thumb, Wyllie et al.

and MacRae suggested a critical slide velocity of mm/min for the evacuation of pit personnel and equipment. From Fig. 4b, at velocities ≥ mm/min, the Cited by:   There are some methods that reduce the driving force behind slope failure, like pore water pressure. Drainage is provided to reduce this pressure and reduce the likelihood of slope failure.

Providing drainage is less expense than support stabilization techniques when it comes to covering large slopes. Excavation or removal of the upper portion of the slope is.

ri / velocity-based method for slope failure detection, pb, $ 15 ri / low-temperature heat capacities and enthalpy of formation of aluminum sulfide (al2s3), pb, $ 10 ri / fluorine recovery from phosphate rock concentrates, pb, $ 10 ri / studies of incipient combustion and its detection, pb, $ Slope stability verification manual Deep Excavation LLC Page 4 B.

Slope verification problem#1 Simple Slope B.1 Problem Description The first problem is the simple case of a total stress analysis without considering pore water Size: 1MB.

Book Description. Numerical Methods in Geotechnical Engineering IX contains technical and scientific papers presented at the 9th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE, Porto, Portugal, 25—27 June ). The papers cover a wide range of topics in the field of computational geotechnics, providing an overview of.

Fukuzono T (a) A new method for predicting the failure time of a slope failure: Proc. 4th Int. Conf. and Field Workshop on Landslides, Tokyo (Japan): – Fukuzono T (b) A method to predict the time of slope failure caused by rainfall using the inverse number of velocity of surface by: These methods are used to obtain slope probability of failure with sufficient accuracy, but with simplified calculation and formulas.

Keywords: slope stability, reliability analyses, probabilistic method, deterministic method. INTRODUCTION The slope formed in the limestone mass under the angle of 65 °, allows the best utilization of coal.

Sample Problems. 2 TABLE OF CONTENTS Instead of assuming a circular failure surface, the slope was analyzed for non-circular failure by optimizing surfaces in a path search.

The slope stability Slope Stability Using the Bishop Simplified Method Slope Stability Using the Janbu Corrected Method. number of methods for detection of the ventilatory threshold (VT) are applied – using the respiratory exchange ratio (VT RER=), the breakpoint of the nonlinear increase of the ventilatory equivalent for oxygen (VT EqO2) and the Vco 2 versus Vo 2 curve (VT V-slope).

Predicting the time of failure is a topic of major concern in the field of geological risk management. Several approaches, based on the analysis of displacement monitoring data, have been proposed in recent years to deal with the issue. Among these, the inverse velocity method surely demonstrated its effectiveness in anticipating the time of collapse of rock Cited by: the collapse of the slope, allowing estimate the slope stability study (Reeves et al.

() [25]). Faillttaz and Or () [9], notes that on to identify who is facing imminent failure by gravity in a natural environment (e.g. a bank), it is a complex and daunting task, especially because suddenAuthor: J. Ortega, M. Rapiman, R. Lecaros, F. Medel, F. Padilla, A. García. SOILS AND FOUNDATIONS Testing Experience Theory Lesson 06 Chapter 6 – Slope Stability.

Topics -Recall modes of slope failure-Explain effects of water on slope stability-Discuss slope stability circular and block refined methods gFor purely cohesive soils, OMS and Bishop method give identical results. Theory of Slope Stability. In the lecture part of this course we will discuss a variety of methods of analysis of slope stability and instability.

It is essential that the engineering geologist be intimately familiar with all of these methods because they provide ways of determining, relatively unambiguously, whether aFile Size: 1MB.

Search the world's most comprehensive index of full-text books. My library. Method Comparison • In this case, slope =implying 28% higher results with new method; intercept = - 44, indicating absolute difference is 44 mm Hg lower with new instrument; r is low (), indicating scatter of data • This would imply poor agreement between new, old method • Graph also identified two data outliers; in.

Slope failure has become a major concern in Malaysia due to the rapid development and urbanisation in the country. It poses severe threats to any highway construction industry, residential areas, natural resources, as well as tourism activities.

Thus, this study aims to characterise the relationship between chromaticity variables to be manipulated as indicators to forecast slope : Rashidi Othman, Mohd Shah Irani Hasni.

1) The traditional limit-equilibrium method is still the most common way to analysis slope stability. But it needs assumption of the failure surface shape and location. It cannot involve the stress-strain behavior of soil. When the slope is supported with anchor or pile the traditional method cannot be used for this problems.

This method has later been considered inaccurate (Caiozzo et al., ), and several other methods have been proposed (Anderson and Rhodes, ; Myers and Ashley, ), for example the V-slope method (Beaver at al., ), and the ventilation equivalent for O 2 (EqO 2) (Reinhard et al., ).Cited by:.

The failure to detect, identify and correct minor roof deterioration and leakage in the earliest stages is considered the greatest cause of premature roof failure [3, 6]. This is particularly true of roofing materials applied on low-slope or flat roofs. Costly roofing problems are often the result.1.

Automatic parameter determination, for rapid method development 2. Default parameters superior to those of Traditional 3. Curvature detection, for reproducible detection of difficult peaks and shoulders 4. Internally adjusted slope threshold, for accurate baseline determination, does not affect peak detection 5.

Gaussian SkimmingAuthor: Rune Buhl Frederiksen.analysis and the thematic slope layer needed for this analysis can be easily created using a series of processes in TNTmips. A thematic slope layer is composed of slope interval categories derived from a slope layer.

Another use of slope layer is discussed on the color plate entitled Urban Studies: Site Selection Size: KB.