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Friday, July 31, 2020 | History

3 edition of Core Index, A Numerical Core-Logging Procedure For Estimating Rock Quality. found in the catalog.

Core Index, A Numerical Core-Logging Procedure For Estimating Rock Quality.

United States Geological Survey

Core Index, A Numerical Core-Logging Procedure For Estimating Rock Quality.

by United States Geological Survey

  • 398 Want to read
  • 34 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesU.S. Geological Survey circular -- 954
ContributionsEge, J.
ID Numbers
Open LibraryOL21722905M

  Thermo-mechanical behaviors of rock masses around underground LNG storage cavern are evaluated by analyzing in-situ rock mass responses measured at the Daejeon pilot cavern and a 2-dimensional numerical model of a lined LNG rock pilot cavern with UDEC and PFC2D, with aims to estimate the temperature profile in the containment system including the . The overall underground rock mass quality in terms of rock quality designation (RQD) is classified as “Fair” to predominantly “Good”, with RQD typically ranging from 90% to %. There is an opportunity to start mining the Intrepid Zone at an earlier date. Stoping is planned to begin in December

  There has been success with using rotary coring techniques, using triple-tube core barrels and air foam flush to recover good quality samples (Phillipson and Brand, ; Phillipson and Chipp, ). Mazier core barrels (73 mm diameter) are commonly used, as are Treifus triple-tube barrels (63 mm diameter). The book "The Complete ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: " was Edited by Professors Resat Ulusay and John hard cover book was compiled and published by the ISRM Turkish National Group and can be purchased from them and also from the ISRM Introduction to the "Blue Book.

Rock quality designation index (RQD) The Rock Quality Designation index (RQD) was developed by Deere (Deere et al ) to provide a quantitative estimate of rock mass quality from drill core logs. RQD is defined as the percentage of intact core pieces longer than mm (4 inches) in the total length of core. Attempts to filter drilling-induced fractures from the rock quality designation calculations (enhanced–rock quality designation) increases the values by factors of – for different thermal/mechanical units. However, rock quality designation values from the tunnel scale are still greater by a factor of –


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Core Index, A Numerical Core-Logging Procedure For Estimating Rock Quality by United States Geological Survey Download PDF EPUB FB2

Get this from a library. Core index: a numerical core-logging procedure for estimating rock quality. [John R Ege; Geological Survey (U.S.)]. Get this from a library. Core index: a numerical core-logging procedure for estimating rock quality.

[John R Ege; Geological Survey (U.S.),]. Core logging is the A Numerical Core-Logging Procedure For Estimating Rock Quality. book of studying the various futures of the rock obtained after exploration.

some of the features which study in core logging are. The core index, a numerical core-logging procedure used by the USGS since in engineering-geology projects at the Nevada Test Site and other locales, provides an objective means for estimating.

John R. Ege has written: 'Core index, a numerical core-logging procedure for estimating rock quality' Asked in Chevrolet, Chevy Trucks and SUVs. A numerical core-logging procedure for estimating rock quality. US Geol Surv Google Scholar Einestein HH, Baecher GB () Probabilistic and statistical methods in engineering geology, specific methods and examples.

The Geomechanics Classification is based on determina- tion of the RMR, a numerical index determined by summing the individual numerical ratings for the following five cate- gories of rock mass parameters: â ¢ Strength of intact rock, â ¢ Drill core quality (in terms of RQD), â ¢ Spacing of discontinuities, â ¢ Condition of.

ASTM's geotechnical engineering standards are instrumental in specifying, testing, and investigating the physical/mechanical properties and characteristic behaviors of surface and subsurface earth materials that are relevant to a construction project.

Such earth materials include soil, dimension stones, slate, soil-cement mixtures, ground water. Process Capability Analysis: Estimating Quality presents a systematic exploration of process capability analysis and how it may be used to estimate quality. The book is designed for practitioners who are tasked with insuring a high level of quality for the products and services offered by their organizations.

Along with describing the necessary. In estimating the σ ci of intact rock, an important issue is the size of the rock block under consideration, as compared to the strength determined from laboratory tests on 50 mm core samples.

Fig. 18, published by Hoek and Brown (a), includes the results of laboratory tests on a wide range of rock types and specimen by: Rock types differ in their surface area and therefore their relative contribution to the overall waste rock composition. If PAG waste rock is highly sericitic, it “opens up” like a book, exposing all its AP.

In contrast, non-PAG waste rock with most of the NP may be very hard, with relatively little reactive surface area. Thus, the quality of rock core was downgraded by not counting the rock fragments, the pieces of core less than the requisite length, pieces of altered granite, and unrecovered core.

The 4 In. ( mm) requisite length was chosen after considerable deliberation as being a reasonably lower limit for a fair quality rock mass containing three or. Applied Mineral Inventory Estimation presents a comprehensive applied approach to the estimation of mineral resources/reserves with particular emphasis on the geological basis of such estimations, the need for and maintenance of a high quality assay data base, the practical use of a comprehensive exploratory data evaluation, and the importance of a comprehensive Cited by: If reference is made to the following parameters entering the CSIR rock mass classification: (i) Uniaxial compressive strength (by the use of the point-load strength index determined on rock cores); (ii) Rock Quality Designation (RQD), as determined during core logging; (iii) Spacing of discontinuities (i.e.

number of joints per meter); (iv Cited by: 3. N.p., — notes were originally prepared during the period to for undergraduate and graduate courses in rock engineering at the University of Toronto.

While some revisions were made in these were difficult because the notes had been formatted as a book with sequential chapter and page numbering. Consequently, the use of the RQD in rock engineering calculations may lead to inaccuracy or errors.

The RQD should, therefore, be used with great care. Consequently, '[while the] RQD is a practical parameter for core logging, it is not sufficient on its own to provide an adequate description of a rockmass' (Bieniawski, ; Milne et al., ).

Their main core is the assessment of the rock mass quality that, preferably, can be used as an indicator for rock engineering. From a set of parameters of the rock, rockmass, groundwater and stresses, the quality of a rockmass with respect to strength.

Full text of "DTIC ADA An Analytical Study of Projectile Penetration into Rock" See other formats AD-A AN ANALYTICAL STUDY OF PROJECTILE PENETRATION INTO ROCK Dwaln K. Butler Army Engineer Waterways Experiment Station Prepared for: Oefense Nuclear Agency June DISTRIBUTED BY: National Technical Information Service U.

Principles is the first volume of the five-volume set Rock Mechanics and Engineering and contains twenty-four chapters from key experts in the following fields: Discontinuities; - Anisotropy; - Rock Stress; - Geophysics; - Strength Criteria; - Modeling Rock Deformation and Failure.

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Core Index, a Numerical Core-Logging Procedure for Estimating Rock Quality By John R. Ege ABSTRACT The core index, a numerical core-logging procedure used by the U.S. Geological Survey since in engineering-geology projects at the Nevada Test Site and other locales, provides an objective means for estimating rock.Sirios Resources Inc.

NI – Technical Report and Mineral Resource Estimate Cheechoo Project JANUARY BBA Document No.: ERAR00 DATE AND SIGNATURE PAGE This report is effective as of the 6th day of December “Signed and sealed original on file” Janu Pierre-Luc Richard, P.

Geo.Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should .