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Numerical modelling of discontinuous rock mass in the elastic domain
266A
ANALYSIS TECHNIQUES:ROCK BLOCK ANALYSIS
theory when the finite-difference grid was rotated relative to the fault and receiver array. (from Authors)
Risk assessment
966201 Simple effective resistivity-depth transformations for infield or real-time data processing M. A. Meju, Computers & Geosciences, 21(8), 1995, pp 985992. Recorded field data usually are not processed on-the-spot such that the success of each measurement is determined postfacto and this may have undesirable practical consequences. It would be more cost-effective to assess the success of a sounding on-site and modify the experimental set-up as appropriate. To serve this purpose, a suite of simple effective data transformation schemes are presented for rapid infield resistivity-depth analysis. Sample applications to dc resistivity, transient electromagnetic and magnetoteUuric field data are provided to demonstrate the general usefulness of the algorithms. (from Author)
966205 Risk assessment: where are we, and where are we going? M. Jefferies, D. Hall, J. Hinchliff & M. Aiken, in: Engineering geology of waste disposal, ed S.P. Bentley, (Geological Society of London; Engineering Geology Special Publication, 11), 1996, pp 341-359. The paper is written as an overview to introduce risk assessment, and hopefully encourage and convince engineering geologists to adopt the techniques. The paper outlines how modern risk-based management techniques are applied within the engineering geology of waste storage and disposal. Both current usage and future developments are discussed. References and a discussion of useful software is provided to assist those starting out. (from Authors)
966202 A comparison of kriging, co-kriging and kriging combined with regression for spatial interpolation of horizon depth with censored observations M. Knotters, D. J. Brus & J. H. O. Voshaar, Geoderma, 67(3-4), 1995, pp 227-246. The performances of kriging and two methods of interpolation which allow to account for an auxiliary variable: cokriging, and kriging combined with regression, were compared. These two methods were applied to improve the interpolation of the soft layers depth (D~) measured by augering, using the bulk soil electrical conductivity (EC~) measured by an electromagnetic instrument as auxiliary variable. Kriging combined with regression gave better results than eo-kriging. Moreover, in kriging combined with regression fewer model pararaeters needed to be estimated. This would be even more advantageous if two or more auxiliary variables were used. (from Authors)
Suggested testing methods and standards 966203 Von der Standzeit abhangige Klassifizierung fur TBMVortriebe nach O N O R M B 2203 (Application of the new O N O R M B 2203 in advance related classification system for TMB headings) H. Lauffer, Felsbau, 13(6), 1994, pp 433-438. In the new Austrian Standard Contract for Underground construction, the impairment of excavation work caused by support works, which are paid separately, is to be calculated with the help of a matrix in which the first ranking number relates to the rock mass conditions and the second to the amount and location of the support works required. The practibility of the approach is demonstrated with the help of a new standup time and performance diagram showing boring velocity and the influence of TBM. (English summary)
Monitoring rock and soil mass performance 966204 Die geodatische Uberwachung von Massenbewegungen (Monitoring of mass movements) T. A. Wunderlicb, Felsbau, 13(6), 1995, pp 414-419. Completely new surveying systems available in geodesy and photogrammetry bring certain advantages as deliverance from mutual intervisibility of points, automatic target detection, quick evaluation of pictures and reliable real-time data transmission capabilities. (English summary)
966206 The use of virtual reality to aid risk assessment in underground situations D. J. McClarnon, B. Denby & D. Schofield, Mining Technology, 77(892), 1995, pp 377-380. The risk assessment of mining operations is often a complex process, requiting consideration of a large number of factors. This paper defines Virtual Reality (VR) and identifies some of its advantages over existing computerised techniques. The feasibility of using a VR system to aid in risk analysis is then considered and a possible method is proposed. The problem of modelling human behaviour by the computer is addressed, and a method suitable for use within a VR risk assessment system is given. Finally, the current systems which have been developed are described. (from Authors) 966207 Probable risk estimation due to reservoir induced seismicity at Jamrani dam project, Kumaon Himalaya, India V. K. Sharma, Bulletin - International Association of Engineering Geology, 52, 1995, pp 103-108. A lake of about 4.5 sq. km, 208 million cubic meter storage capacity is proposed downstream of the 130 m high Jamrani dam. The bedrock around the lake consists of alternate bands of sandstone, clayshale and siltstone of Siwalik Formations (Middle Miocene to Pliocene) and thrust mass of Amritpur granite. The tectonic plane (main boundary fault) lies about 3.5 km upstream of the dam. The problem of reservoir induced seismicity is discussed based on factors such as: 1) geo-tectonic setting, 2) pore-water pressure, 3) background seismicity and 4) reservoir water load. (from Author)
ANALYSIS TECHNIQUES AND DESIGN METHODS Rock block analysis 966208 Numericko modeliranje diskontinuiranog stijenskog materijala u elasticnom podrucju (Numerical modelling of discontinuous rock mass in the elastic domain) B. Kovacevic-Zelic, D. Kovacic & S. Vujec, Rudarsko Geolosko Naftni Zbornik, 7, 1995, pp 37-43. In this paper, the applicability of some models within the framework of theory of elasticity are examined. The analyses are carried out using isotropic and transversely isotropic models and an 'equivalent' material approach. A parametric study is also made to examine the influence of discontinuities on the parameters of the equivalent materials. Comparison of the models is made through numerical modelling of the direct shear test. The analysis were performed with finite difference code FLAC. (English summary)
ANALYSIS TECHNIQUES:ROCK BLOCK ANALYSIS
theory when the finite-difference grid was rotated relative to the fault and receiver array. (from Authors)
Risk assessment
966201 Simple effective resistivity-depth transformations for infield or real-time data processing M. A. Meju, Computers & Geosciences, 21(8), 1995, pp 985992. Recorded field data usually are not processed on-the-spot such that the success of each measurement is determined postfacto and this may have undesirable practical consequences. It would be more cost-effective to assess the success of a sounding on-site and modify the experimental set-up as appropriate. To serve this purpose, a suite of simple effective data transformation schemes are presented for rapid infield resistivity-depth analysis. Sample applications to dc resistivity, transient electromagnetic and magnetoteUuric field data are provided to demonstrate the general usefulness of the algorithms. (from Author)
966205 Risk assessment: where are we, and where are we going? M. Jefferies, D. Hall, J. Hinchliff & M. Aiken, in: Engineering geology of waste disposal, ed S.P. Bentley, (Geological Society of London; Engineering Geology Special Publication, 11), 1996, pp 341-359. The paper is written as an overview to introduce risk assessment, and hopefully encourage and convince engineering geologists to adopt the techniques. The paper outlines how modern risk-based management techniques are applied within the engineering geology of waste storage and disposal. Both current usage and future developments are discussed. References and a discussion of useful software is provided to assist those starting out. (from Authors)
966202 A comparison of kriging, co-kriging and kriging combined with regression for spatial interpolation of horizon depth with censored observations M. Knotters, D. J. Brus & J. H. O. Voshaar, Geoderma, 67(3-4), 1995, pp 227-246. The performances of kriging and two methods of interpolation which allow to account for an auxiliary variable: cokriging, and kriging combined with regression, were compared. These two methods were applied to improve the interpolation of the soft layers depth (D~) measured by augering, using the bulk soil electrical conductivity (EC~) measured by an electromagnetic instrument as auxiliary variable. Kriging combined with regression gave better results than eo-kriging. Moreover, in kriging combined with regression fewer model pararaeters needed to be estimated. This would be even more advantageous if two or more auxiliary variables were used. (from Authors)
Suggested testing methods and standards 966203 Von der Standzeit abhangige Klassifizierung fur TBMVortriebe nach O N O R M B 2203 (Application of the new O N O R M B 2203 in advance related classification system for TMB headings) H. Lauffer, Felsbau, 13(6), 1994, pp 433-438. In the new Austrian Standard Contract for Underground construction, the impairment of excavation work caused by support works, which are paid separately, is to be calculated with the help of a matrix in which the first ranking number relates to the rock mass conditions and the second to the amount and location of the support works required. The practibility of the approach is demonstrated with the help of a new standup time and performance diagram showing boring velocity and the influence of TBM. (English summary)
Monitoring rock and soil mass performance 966204 Die geodatische Uberwachung von Massenbewegungen (Monitoring of mass movements) T. A. Wunderlicb, Felsbau, 13(6), 1995, pp 414-419. Completely new surveying systems available in geodesy and photogrammetry bring certain advantages as deliverance from mutual intervisibility of points, automatic target detection, quick evaluation of pictures and reliable real-time data transmission capabilities. (English summary)
966206 The use of virtual reality to aid risk assessment in underground situations D. J. McClarnon, B. Denby & D. Schofield, Mining Technology, 77(892), 1995, pp 377-380. The risk assessment of mining operations is often a complex process, requiting consideration of a large number of factors. This paper defines Virtual Reality (VR) and identifies some of its advantages over existing computerised techniques. The feasibility of using a VR system to aid in risk analysis is then considered and a possible method is proposed. The problem of modelling human behaviour by the computer is addressed, and a method suitable for use within a VR risk assessment system is given. Finally, the current systems which have been developed are described. (from Authors) 966207 Probable risk estimation due to reservoir induced seismicity at Jamrani dam project, Kumaon Himalaya, India V. K. Sharma, Bulletin - International Association of Engineering Geology, 52, 1995, pp 103-108. A lake of about 4.5 sq. km, 208 million cubic meter storage capacity is proposed downstream of the 130 m high Jamrani dam. The bedrock around the lake consists of alternate bands of sandstone, clayshale and siltstone of Siwalik Formations (Middle Miocene to Pliocene) and thrust mass of Amritpur granite. The tectonic plane (main boundary fault) lies about 3.5 km upstream of the dam. The problem of reservoir induced seismicity is discussed based on factors such as: 1) geo-tectonic setting, 2) pore-water pressure, 3) background seismicity and 4) reservoir water load. (from Author)
ANALYSIS TECHNIQUES AND DESIGN METHODS Rock block analysis 966208 Numericko modeliranje diskontinuiranog stijenskog materijala u elasticnom podrucju (Numerical modelling of discontinuous rock mass in the elastic domain) B. Kovacevic-Zelic, D. Kovacic & S. Vujec, Rudarsko Geolosko Naftni Zbornik, 7, 1995, pp 37-43. In this paper, the applicability of some models within the framework of theory of elasticity are examined. The analyses are carried out using isotropic and transversely isotropic models and an 'equivalent' material approach. A parametric study is also made to examine the influence of discontinuities on the parameters of the equivalent materials. Comparison of the models is made through numerical modelling of the direct shear test. The analysis were performed with finite difference code FLAC. (English summary)