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Tuesday, May 5, 2020 | History

2 edition of Seismic testing across a vertical rock section in the Creighton Mine. found in the catalog.

Seismic testing across a vertical rock section in the Creighton Mine.

J. Wong

Seismic testing across a vertical rock section in the Creighton Mine.

by J. Wong

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Published .
Written in English


About the Edition

An investigation was conducted at INCO"s Creighton Mine to monitor the seismicity of the area. A brief description of the rock mass and the survey equipment used are provided in this article.

Edition Notes

1

The Physical Object
Pagination12 p.
Number of Pages12
ID Numbers
Open LibraryOL21627460M

occurred at Incos Creighton Mine over several years of mining. For each rockburst, a Map3D numerical model was run to determine the stress state at the time and location of the burst. If we plot all of these stress predictions on a set of 1 versus 3 axes we obtain the following. Stress State at Time of Burst 0 50 0 5 10 We estimate the static seismic moment and radiated seismic energy for each recorded seismic event induced by mining operations at the two underground mine locations. These seismic source parameters are estimated from source spectra have been corrected for the instrument response, propagation effects and bandwidth limitations.

Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic method requires a controlled seismic source of energy, such as dynamite or Tovex blast, a specialized air gun or a seismic vibrator, commonly known by the trademark . Ecological impacts of Conventional Seismic Practices The movement of oil and gas exploration and development activity into basins with little to no exploration activity, especially away from the existing infrastructure such as the Dempster and Alaska Highway corridors, will demand some creative thinking into how to move heavy loads across the.

In the analyses, the seismic response of a section of the Bolu tunnels is examined with 2-D finite element models and results are compared with the recorded data to evaluate the capability of the available analysis methods. area, throughout the integration of well information, 3D depth seismic data and paleographic reports. The procedure followed was the interpretation of seismic lines and cross lines across the MC area, producing a seismic map view grid with the Top and Base of salt interpreted, being this structure the prevailing one in the subdivision. This.


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Seismic testing across a vertical rock section in the Creighton Mine by J. Wong Download PDF EPUB FB2

This book is intended for mine seismologists and for mine geotechnical engineers who are, or plan to become, involved in advising mines on how to. Mining-induced seismic hazard assessment is an important component in the management of safety and financial risk in mines. As the seismic hazard is a response to the mining activity, it is non-stationary and variable both in space and time.

This paper presents an approach for implementing a probabilistic seismic hazard assessment to assess the current hazard state of. Seismic methods for hard rock mineral exploration; 34th IGC Brisbane 5. Rock Properties - Gold Deposit. 3 Density (gm/cc) P-wave Velocity (m/s) Basalt.

Sulphidic Sed. Felsics. basalt. felsic. ultramafic. ultramafic. basalt. Sulphidic sed. Gold p s • Felsic - basalt contrast • Gold deposited in fracture. Introduction.

The safety and productivity of underground mining can be severely affected by seismic activity. Mining-induced seismic events, which are induced by sudden release of strain energy accumulated in the coal-rock mass, are associated with not only superficial structure movement triggered by stress manifestation, but also related to large geological discontinuity.

Seismic Monitoring Strategies for Deep Longwall Coal Mines Peter Swanson, M. Shawn Boltz, and Derrick Chambers. DEPARTMENT OF HEALTH AND HUMAN SERVICES. Centers for Disease Control and Prevention. National Institute for Occupational Safety and Health.

Office of Mine Safety and Health Research. Pittsburgh, PA • Spokane, WA. October Both the source/receiver distance above or below the high-velocity layer and the velocity contrast (V 1: V 2) across the seismic interface determine if the refracted wave will arrive before the direct wave.

Due to the effect refracted waves have on crosshole data sets, ASTM procedures require a three-borehole array because velocity corrections. Approximately seismic events with local magnitude (M) ranging from to were located within the mine, yielding a b-value (slope of the logarithm of the number of events with magnitude greater than M versus M) of CHARACTERISTICS OF MINING-INDUCED SEISMICITY AND ROCK BURSTING IN A DEEP HARD-ROCK MINE By P.

swanson' and C. sines2 ABSTRACT Over a recent month observation period, the U.S. Bureau of Mines obtained seismogram records from a single vertical-component, short-period seismometer installed at the surface of a metal mine in northern Idaho.

China, and India. Shear wave velocities of rock layers underneath soil layers have also been collected at depths from a few meters to m.

It is shown that a site classification system based on the top m soil layers often represents stiffer site classes for soil sites having shallow rock depths (rock depths less than 25 m from the soil. Since and through a number of case studies, we have been testing a newly developed for urban environment, digital-based m long, seismic landstreamer for.

Seismic Exploration. Seismic exploration is the search for commercially economic subsurface deposits of crude oil, natural gas and minerals by the recording, processing, and interpretation of artificially induced shock waves in the earth. Artificial seismic energy is generated on land by vibratory mechanisms mounted on specialized trucks.

Locations of underground structures (concrete tunnels) that failed during the CΗΙ-CΗΙ() earthquake, plotted against recorded maximum ground accelerationcontours at ground surface. Note that all tunnels that were damaged lie within the g contour f a i l u r e p o t e n t i a l t d u e t o s e i s mi c w a.

Although Rock Mechanics addresses many of the rock mechanics issues which arise in underground mining engineering, it is not a text exclusively for mining applications. It consists of five categories of topics on the science and practice of rock engineering: basic engineering principles relevant to rock mechanics; mechanical properties of rock and rock masses; design 5/5(3).

Figure 3. 3D seismic survey at Sudbury: vertical section and interpreted SIC/foot - wall contact (top), 3D view of the dipping contact (lower left), red lines show the locations of the depth section and time slice (bottom right).

Bright spots corresponding to possible sulfide deposits can be seen on both seismic sections. DOE/Lawrence Livermore National Laboratory. (, July 15). Seismic Waves From Mine Collapses Can Now Be Distinguished From Other Seismic Activities. ScienceDaily. Retrieved Ma from.

The seismic system at the DMLZ currently consists of 15‐Hz geophone sensors. A few lower frequency ‐Hz geophones are planned to be installed in the near future to help improve the accuracy of seismic source parameters of larger magnitude events.

The DMLZ mine staff are developing a plan to. Figure 2 - P-wave velocity determination of sandstone samples from Laboratory testing Seismic profiling at OCP coal mine A seismic profiling survey was carried out to characterise sandstone rock mass on the basis of P-wave velocity measurements.

The survey was carried out at the surface of sandstone rock mass towards N.E direction of the Mine. seismic data were processed along a straight CDP line and an interpretation was made based on the migrated section.

3D ray-tracing modeling was performed to test the interpretation. A few rock samples from the ore body were provided by Boliden Mines and these were used to estimate the P-wave velocity of the sul-fide ore. University of California Policy Seismic Safety Policy 3 of 20 Seismic Risk Model: A tool, maintained by the Office of the President, to assess seismic risk in University Facilities.

University Facility: Buildings and other structures located within California that are owned by the University and used for University-related purposes. Seismic Coal Exploration Part B: In-Seam Seismics [Dresen, L., Rüter, H.] on *FREE* shipping on qualifying offers.

Seismic Coal Exploration Part B: In-Seam SeismicsFormat: Hardcover. Purchase Seismic Coal Exploration, Volume 16 - 1st Edition.

Print Book & E-Book. ISBNSeismic interpretation, whether for hydrocarbon exploration or geotechnical studies, is the determination of the geological significance of seismic data.

It is rare that the correctness (or incorrectness) of an interpretation can be ascertained, because the actual geology is rarely known in enough detail.

Underground structures are well known to be earthquake resistant. However, the recent earthquakes showed that underground structures are also vulnerable to seismic damage. There may be several reasons such as high ground motions and permanent ground movements. This study attempts to describe various forms of damage to underground structures such as .