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Monday, July 27, 2020 | History

2 edition of Micro-seismic method of determining the stability of underground openings found in the catalog.

Micro-seismic method of determining the stability of underground openings

Leonard Obert

Micro-seismic method of determining the stability of underground openings

by Leonard Obert

  • 274 Want to read
  • 29 Currently reading

Published by U.S. G.P.O. in Washington, D.C .
Written in English

    Subjects:
  • Geology -- Research.,
  • Microseisms.

  • Edition Notes

    Bibliography: p. [18].

    Statementby Leonard Obert and Wilbur I. Duvall.
    SeriesBulletin / Bureau of Mines ;, 573, Bulletin (United States. Bureau of Mines) ;, 573.
    ContributionsDuvall, Wilbur I.
    Classifications
    LC ClassificationsTN23 .U4 no. 573
    The Physical Object
    Paginationiii, 17 p., 1 leaf of folded plates :
    Number of Pages17
    ID Numbers
    Open LibraryOL6240723M
    LC Control Number57062143
    OCLC/WorldCa7985406

      Drilling core, the most common method of determining underground conditions, only recovers less than % of the excavated volume of the tunnel on a typical project in the most exhaustive survey, which leaves a great deal of room for ~gs/ a stochastic method for seismic stability evaluation of earth structures with strain dependent properties s. k. sarma. stability analysis of earth dams and embankments during strong earthquakes. swami saran and shamsher prakash. effect of wall movement on lateral earth pressure. vijay k. khosla and ram d.

    The dynamic evaluation method of slope stability is proposed based on dynamic and whole strength reduction methods in order to obtain the slope stability in the progressive failure ://   6. Earthquake (Seismic) Design 7. Soil Bearing and Stability 8. Designing the Cantilever Wall Stem 9. Footing Design Pier and Pile Foundations Counterfort Retaining Walls Cantilevered Tilt-Up Walls Wood Retaining Walls Gravity Walls Gabion Walls Segmental Retaining Walls Swimming Pool Walls Pilaster Masonry

    seismic stability calculations of earth and rock fill dams. zhang kexu. preliminary analysis of damage to the bai river and the chiao river dam. , , j.l. ehasz. dynamic properties of a weathered rock. j. studer, n. zingg, e.g. prater. investigation of cyclic stress-strain characteristics of gravel material. R.P. Young, M.H.B. Nasseri, M. Sehizadeh, () Mechanical and Seismic Anisotropy of Rocks from the ONKALO Underground Rock Characterization l of Rock Mechanics& Mining Sciences () Qingsheng Bai, Maria, Tibbo, M. H. B. Nasseri, R. Paul Triaxial Experimental Investigation of Rock Response around the Mine-By Tunnel under In Situ 3D Stress ://


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Micro-seismic method of determining the stability of underground openings by Leonard Obert Download PDF EPUB FB2

Get this from a library. Micro-seismic method of determining the stability of underground openings. [Leonard Obert; Wilbur I Duvall]   The stability of underground caverns subjected to unloading disturbance is very important for engineering practice during construction stages.

The rocks in the Xinzhuangzi Coalmine in Huainan are becoming increasingly unstable with the advancement of the excavation face. To evaluate the stability and failure mechanism of the surrounding rock mass, a microseismic (MS) monitoring system was   “Micro‐seismic Method of Determining the Stability of Underground Openings” L.

Obert, W.I. Duval. • Troy Mine seismic data. Questions. Title: Microsoft PowerPoint - Bryan Author: SuAnderson Created Date: A shear zone is the outcome of a fault where the displacement is not confined to a single fracture, but is distributed through a fault zone.

Shear zones vary in thickness from a fraction of meters to hundreds of meters. Depending upon the thickness, the shear zone has a variable effect on the stability of underground openings and :// Ömer Aydan's 87 research works with citations and 6, reads, including: Dynamic Analyses of Abandoned Mines During Earthquakes   Another advantage of RFPA2D is that it can be used to help examine the feasibility of a support design of underground openings in burst prone ground.

For example, from the above simulation, three areas are found to be the locations with intense micro-seismic activity (as shown in Fig. 10). Rock Dynamics – Experiments, Theories and Applications is a collection of scientific and technical papers presented at the Third International Conference on Rock Dynamics and Applications (RocDyn-3, Trondheim, Norway, June ).The papers in the book reflect the recent developments in experiment and theory as well as engineering applications of rock :// Abstract.

This book presents the principles of rock mechanics in a systematic way, reflecting both the historic development and the contemporary status of theoretical and experimental techniques used for the determination of the properties and stress state of rock masses, calculation of elements of systems for exploitation of useful mineral deposits and the design of mine ://   The book ‘Support of Underground Excavations in Hard Rock’ testi- fies to the willingness of Canadian industries and universities to col- laborate in the field of pre-competitive research and learning, to Part of Z-Library project.

The world's largest ebook library. New post "Home page, "Mark as downloaded" button and improved book recommendations" in our :// Book Description. Rock Dynamics – Experiments, Theories and Applications is a collection of scientific and technical papers presented at the Third International Conference on Rock Dynamics and Applications (RocDyn-3, Trondheim, Norway, June ).The papers in the book reflect the recent developments in experiment and theory as well as engineering applications of rock :// /Li-Li-Zhang/p/book/   E.

Carvalho, M. Fardis. EUR EN - Eurocode 8: Seismic Design of Buildings Worked examples Worked examples presented at the Workshop “EC 8: Seismic Design of Buildings”, Lisbon, Feb.

The values of K 1 −K 2 and K 3 depend on the thicknesses of the different rock layers and the uniaxial compressive strength of the immediate roof over underground openings. The different layers e.g. sandstones, argillites, aleurolites and alluvium in the rock mass are shown to influence the existence of hollows in abandoned ://   The seismic design method adopted in the Recommendation is the allowable stress method modified with B, the ratio of the horizontal load-carrying capacity in the structure to the short-term allowable yield strength.

The design for each tank is described in chapter 4 and onwards. Chapters   determining the uniaxial compressive strength and deformability of rock materials, surface subsidence or closing of the walls of underground openings.

The overall stability of concrete dams depends, in part, on the relative deformability of the foundation rock The method is called the seismic pulse method. Using the theory of elastic ~amadei/CVEN/PDF/   improvement of seismic safety. The prob-lems of repairs, restoration and seismic strengthening of buildings are briefly stated below: (i) Before the occurrence of the probable earthquake, the required strengthen-ing of seismically weak buildings is to be determined by a survey and analysis of the structures.

(ii) Just after a damaging earthquake, Book Description. Harmonising Rock Mechanics and the Environment comprises the proceedings (invited and contributed papers) of the 12th ISRM International Congress on Rock Mechanics (Beijing, China, October ).

The contributions cover the entire scope of rock mechanics and rock engineering, with an emphasis on the critical role of both disciplines in sustainable development and /Qian-Zhou/p/book/ Abstract. Excavation stability in an underground nuclear waste repository is required during construction, emplacement, retrieval (if required), and closure phases to ensure worker health and safety, and to prevent development of potential pathways for radionuclide migration in the post-closure :// D Guide for Geotechnical Mapping of Large Underground Openings in Rock.

D Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications. D Guide for Using the Seismic Refraction Method for Subsurface Investigation.

D Practice for Using Significant Digits in Geotechnical Data Based on uniaxial compression test, the mechanical properties and acoustic emission characteristics of rock had been obtained, including the relationship between AE and time, AE and stress level, and so on, in the whole process of rock failure.

Research shows AE rate of rock has the subparagraph features obviously. There are three obvious AE sections for the higher strength elastic-brittle. the key zone to control in order to obtain stability of coal and rock mass that surrounds gateways.

The EBZ is defined as a zone with major changes in flow and transport properties that develop with macro-fracturing; its size plays a significant role in the stability around man-made openings, and it has sparked deep discussion and ://  Module 6: Stresses around underground openings.

Module 6 Lecture 1; Module 6 Lecture 2; Module 6 Lecture 3; Module 6 Lecture 4; Module 7: Planes of weakness in rocks. Module 7 Lecture 1; Module 7 Lecture 2; Module 7 Lecture 3; Module 7 Lecture 4; Module 8: Rock slope stability.

Module 8 Lecture 1; Module 8 Lecture 2; Module 8 Lecture 3; Module is a platform for academics to share research ://