|Statement||submitted by Jeffery Gaudette.|
|The Physical Object|
|Pagination||1 v. (various paging) :|
Seismic monitoring using geophones aims at predicting roof fall by measuring microseismic events caused by movements within a rock mass. Geophones are based on an inertial mass (proof mass) suspended from a spring. The response of a geophone is proportional to the ground velocity (both P . Microseismic monitoring has been used at several large natural rock slope, civil and open pit mine slopes with varying degrees of success. In spite of some operational difficulties experienced at. The deformed rock structure may cause water conducting channel to form and rock porosity to change, resulting in change in rock resistivity. This effect will be more remarkable in low resistivity rocks. Thus, the apparent resistivity data measured can be associated with rock floor deformation and different stress by: 8. To date, the rockburst phenomenon has been studied in the ﬁeld using in situ micro seismic monitoring, at the lab using true triaxial tests, and theoretically using ana- lytical and numerical approaches.
Most studies showed that a wider range of rock mass characterization will be required to create an ideal numerical model due to the rock reality, inelasticity, fractures, anisotropy, and. where v pF is the P-wave velocity of in situ rock mass; v pq is the P-wave velocity of a rock mass with RQD = 0; and k q is a parameter taking into account the actual conditions of the in situ rock mass. Based on regression analysis of the data obtained for heavily fractured calcareous rock masses out-cropping in southern Italy (Fig. Pergamon Int. J. Rock Mech. Min. Sci. Vol. 34, No. 8, pp. I, Elsevier Science Ltd. All fights reserved PII: S(97) Printed in Great Britain /97 $ + Practical Estimates of Rock Mass Strength E. HOEKt E. T. BROWN~ The Hoek-Brown failure criterion was originally developed for estimating the strengths of hard rock masses. Existing rockburst evaluation techniques are empirical in nature which limit their use to situations where seismic monitoring data is available. The p.
Seismic Monitoring Seismic monitoring aims to predict slope deformation by measuring micro seismic events caused by brittle movements within a rock slope. Analysis of micro seismic events using multiple tri axial geophones enables the location of source and therefore the discontinuity on which movement is occurring. 47 Monitoring and analysis of a large mass movement area in clay endangering a motorway in Bavaria, Germany L. Wilfing, C. Meier, C. Boley & T. Pfeifer. Rock mass strength and failure. On a model of geomechanical effect of underground explosion in the massif of block-like structure and the mechanism of rock . MicroSeismic, Inc. is a global leader in real-time Seismicity Monitoring with proprietary arrays in Canada and the U.S. AlertArray™ The real-time seismicity monitoring network, AlertArray, offers a low-cost alternative to monitoring each completion in a wide range of areas and is in compliance with specific regional orders and mandates. rock masses is a challenging task. UDEC is speciﬁcally developed to model discontinuous problems. It can accommodate many discontinu-ities and permits the modelling system to undergo large geometrical change through the use of a contact updating scheme (Fig. 1). In UDEC, the deformation of a fractured rock mass consists of the elastic/plastic.