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Seismic risk analysis of Japan: peak ground acceleration and uniform risk response spectra
218A
ANALYSIS TECHNIQUES:STRESS
965219 A least-squares minimization approach to depth determination from numerical horizontal gravity gradients E.-S. M. Abdelrahman & S. M. Sharafeldin, Geophysics, 60(4), 1995, pp 1259-1260. The aim of the present study is to develop an interpretive technique based on fitting a simple model convolved with the same horizontal gradient filter as applied to the observed Bouguer gravity data. The depth determination problem from observed horizontal gravity gradient anomaly is transformed into the problem of finding a solution of a nonlinear equation of the formf(z) = 0. Formulae are derived for the sphere and horizontal cylinder. Procedures are also formulated to estimate the radius of the buried structure. (from Authors) 965220 AI assisted coal interpretation techniques A. A. Cram, G. P. J. Turczynski, M. Godresse, G. Low, I. J. Driver & N. Ozawa, in: Applications of computers and
operations research in the minerals industries. Conference, Brisbane, 1995, ed A N O N (AusIIM), 1995, pp 115-122. This paper describes an integrated geological interpretation system based on maximised use of AI techniques. The first part describes the lithologicalinterpretation which uses a number of boreholes with both logged lithologyand downhole geophysical logs. This information provides a learning set of data to the neural network. The second part concentrates on the correlationof both coal and noncoal units from borehole to borehole. (from Authors)
Monitoring rock and soil mass performance 965221 Assessment of the mechanical state of a rock m a s s from the recording of blast-induced seismoacoustic activity V. V. Nosov, Journal of Mining Science, 31(2), 1995, pp 7986; translated from: Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2, 1995, pp 3-10. An increase in the depth of mining operations is coupled with the need for the enhancement of worker safety; this renders the development of effective methods of monitoring the mechanical state of a rock mass (RM) and the prediction of dynamic manifestations of mine pressure urgent. An approach to the development of effective methods of evaluating the mechanical state of RM is proposed, and an example of the implementation of one of these methods is presented in this study. (from Journal summary)
Risk assessment 965222 Seismic risk analysis of Japan: peak ground acceleration and uniform risk response spectra M. Talebian, Individual Studies by Participants at the International Institute of Seismology and Earthquake Engineering, 31, 1995, pp 59-70. One of the most important problem in earthquake engineering is to predict the peak ground acceleration of future earthquakes from the past available data of activity for a specified site. Here a Poisson-type model proposed by Cornell (1968) developed as a computer program by McGulre (1976) is used. Calculation was made for seven major cities in Japan for four types of ground condition. The method was then performed to evaluate seismic hazard in terms of acceleration response spectrum for Kobe city. The results of analysis indicate that values of predicted acceleration are sensitive to ground condition and earthquake data used for analysis. (from Author)
965223 Ecological risk assessment case study: impacts to aquatic receptors at a former metals mining superfund site H. A. Hattemer-Frey, R. E. Quinian & G. R. Krieger, Risk Analysis, 15(2), 1995, pp 253-265. An ecological risk assessment was conducted as part of the Baseline Risk Assessment of the Remedial Investigation for the Baxter Springs/Treece subsites, Cherokee County, Kansas Supeffund site, a former metals mining site. Chemicals of potential concern were heavy metals associated with mine wastes and with base metal ore deposits that were characteristic of this area. An EPA-approved method was used to develop site-specific ambient water quality criteria. The data were used to obtain a realistic picture of actual and potential population- and community-level effects associated with exposure to mining-related metals. (from Authors)
ANALYSIS TECHNIQUES AND DESIGN METHODS Rock block analysis 965224 Sampling power-law distributions G. Picketing, J. M. Bull & D. J. Sanderson, Tectonophysies, 248(1-2), 1995, pp 1-20. Power-law distributions describe many phenomena related to rock fracture. Data collected to measure the parameters of such distributions only represent samples from some underlying population. Without proper consideration of the scale and size limitations of such data, estimates of the population parameters, particularly the exponent D, are likely to be biased. A Monte Carlo simulation of the sampling and analysis process has been made, to test the accuracy of the most common methods of analysis and to quantify the confidence interval for D. (from Authors)
965225 An adaptive neural network for real-time prediction of rock behaviour in coal mines (in Chinese) Feng Xiating, Wang Yongjia & Yao Jianguo, Journal China Coal Society, 20(5), 1995, pp 455-460. An adaptive recognition approach for rcal-time prediction of rock behaviour was proposed by application of artificial neural network theory. It can predict the rules of future rock behaviour including the weighting interval and strength based on output of underground observation data. Practical experience indicates that this method can be applied to prediction of weighting in advancing cycles in ten faces by extrapolation with an accuracy of 93% for weighting strength and 100% for weighting interval. (English summary)
Stress analysis 965226 CSTRAIN a F O R T R A N 77 program to study Fry's plots in two-dimensiounl simulated models A. R. Ghaleb & N. Fry, Computers & Geosciences, 21(7), 1995, pp 825-831. This paper presents a CSTRAIN program, written in FORTRAN 77, which could help to study and understand Fry plots using Fry's center-to-center method for finite strain analysis in deformed rocks. The program can be used to generate two-dimensional isotropic distributions with differing degrees of anticlnstering, ranging from random to strongly anticlustered distributions. These point distributions can be deformed homogeneously by pure shear and rotation to provide any desired strain ratio and orientation of Fry plot. A description for the program is given with sample Fry plots together with the program listing. (from Authors)
ANALYSIS TECHNIQUES:STRESS
965219 A least-squares minimization approach to depth determination from numerical horizontal gravity gradients E.-S. M. Abdelrahman & S. M. Sharafeldin, Geophysics, 60(4), 1995, pp 1259-1260. The aim of the present study is to develop an interpretive technique based on fitting a simple model convolved with the same horizontal gradient filter as applied to the observed Bouguer gravity data. The depth determination problem from observed horizontal gravity gradient anomaly is transformed into the problem of finding a solution of a nonlinear equation of the formf(z) = 0. Formulae are derived for the sphere and horizontal cylinder. Procedures are also formulated to estimate the radius of the buried structure. (from Authors) 965220 AI assisted coal interpretation techniques A. A. Cram, G. P. J. Turczynski, M. Godresse, G. Low, I. J. Driver & N. Ozawa, in: Applications of computers and
operations research in the minerals industries. Conference, Brisbane, 1995, ed A N O N (AusIIM), 1995, pp 115-122. This paper describes an integrated geological interpretation system based on maximised use of AI techniques. The first part describes the lithologicalinterpretation which uses a number of boreholes with both logged lithologyand downhole geophysical logs. This information provides a learning set of data to the neural network. The second part concentrates on the correlationof both coal and noncoal units from borehole to borehole. (from Authors)
Monitoring rock and soil mass performance 965221 Assessment of the mechanical state of a rock m a s s from the recording of blast-induced seismoacoustic activity V. V. Nosov, Journal of Mining Science, 31(2), 1995, pp 7986; translated from: Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2, 1995, pp 3-10. An increase in the depth of mining operations is coupled with the need for the enhancement of worker safety; this renders the development of effective methods of monitoring the mechanical state of a rock mass (RM) and the prediction of dynamic manifestations of mine pressure urgent. An approach to the development of effective methods of evaluating the mechanical state of RM is proposed, and an example of the implementation of one of these methods is presented in this study. (from Journal summary)
Risk assessment 965222 Seismic risk analysis of Japan: peak ground acceleration and uniform risk response spectra M. Talebian, Individual Studies by Participants at the International Institute of Seismology and Earthquake Engineering, 31, 1995, pp 59-70. One of the most important problem in earthquake engineering is to predict the peak ground acceleration of future earthquakes from the past available data of activity for a specified site. Here a Poisson-type model proposed by Cornell (1968) developed as a computer program by McGulre (1976) is used. Calculation was made for seven major cities in Japan for four types of ground condition. The method was then performed to evaluate seismic hazard in terms of acceleration response spectrum for Kobe city. The results of analysis indicate that values of predicted acceleration are sensitive to ground condition and earthquake data used for analysis. (from Author)
965223 Ecological risk assessment case study: impacts to aquatic receptors at a former metals mining superfund site H. A. Hattemer-Frey, R. E. Quinian & G. R. Krieger, Risk Analysis, 15(2), 1995, pp 253-265. An ecological risk assessment was conducted as part of the Baseline Risk Assessment of the Remedial Investigation for the Baxter Springs/Treece subsites, Cherokee County, Kansas Supeffund site, a former metals mining site. Chemicals of potential concern were heavy metals associated with mine wastes and with base metal ore deposits that were characteristic of this area. An EPA-approved method was used to develop site-specific ambient water quality criteria. The data were used to obtain a realistic picture of actual and potential population- and community-level effects associated with exposure to mining-related metals. (from Authors)
ANALYSIS TECHNIQUES AND DESIGN METHODS Rock block analysis 965224 Sampling power-law distributions G. Picketing, J. M. Bull & D. J. Sanderson, Tectonophysies, 248(1-2), 1995, pp 1-20. Power-law distributions describe many phenomena related to rock fracture. Data collected to measure the parameters of such distributions only represent samples from some underlying population. Without proper consideration of the scale and size limitations of such data, estimates of the population parameters, particularly the exponent D, are likely to be biased. A Monte Carlo simulation of the sampling and analysis process has been made, to test the accuracy of the most common methods of analysis and to quantify the confidence interval for D. (from Authors)
965225 An adaptive neural network for real-time prediction of rock behaviour in coal mines (in Chinese) Feng Xiating, Wang Yongjia & Yao Jianguo, Journal China Coal Society, 20(5), 1995, pp 455-460. An adaptive recognition approach for rcal-time prediction of rock behaviour was proposed by application of artificial neural network theory. It can predict the rules of future rock behaviour including the weighting interval and strength based on output of underground observation data. Practical experience indicates that this method can be applied to prediction of weighting in advancing cycles in ten faces by extrapolation with an accuracy of 93% for weighting strength and 100% for weighting interval. (English summary)
Stress analysis 965226 CSTRAIN a F O R T R A N 77 program to study Fry's plots in two-dimensiounl simulated models A. R. Ghaleb & N. Fry, Computers & Geosciences, 21(7), 1995, pp 825-831. This paper presents a CSTRAIN program, written in FORTRAN 77, which could help to study and understand Fry plots using Fry's center-to-center method for finite strain analysis in deformed rocks. The program can be used to generate two-dimensional isotropic distributions with differing degrees of anticlnstering, ranging from random to strongly anticlustered distributions. These point distributions can be deformed homogeneously by pure shear and rotation to provide any desired strain ratio and orientation of Fry plot. A description for the program is given with sample Fry plots together with the program listing. (from Authors)