... stability experiment diorite Sweden pillar rock mass heating phase ABSTRACT: The Swedish Nuclear Fuel and Waste Management Co. is carrying out the Äspö Pillar Stability Experiment at the 450-m-level of the Äspö Hard Rock Laboratory. The major objectives of this experiment are to demonstrate...

.... This descriptive model involves the characterization of rock mass by means of both the empirical relationships and a theoretical approach based on numerical modeling [1]. During the site investigation phase, various scenarios will have to be evaluated that require knowledge of the rock mass response. Extensive...

... ABSTRACT ABSTRACT: The modulus of deformation of a rock mass as determined by in situ testing is always less than the modulus determined from intact cores taken from the rock mass. It is generally concluded that structural features such as joints are primarily responsible for the reduction...

... Wellbore Design discretization instability rock mass grid wellbore integrity Upstream Oil & Gas trajectory mechanical property information borehole instability geometry zone size salt diapir Drilling Reservoir Characterization diapirism diapir Mungo field in-situ stress...

... Abstract: Slope stability designs are largely dependent on rock mass and more specifically discontinuity characterization. Traditional discontinuity characterization methods (scanline and cell mapping) have many problems associated with time, safety, accuracy, and human bias. This study shows...

.... The sites being investigated and the immediate surroundings covers an area of between 5 and 10 km2. The objective is to collate sufficient knowledge about the rock mass and its properties to enable SKB to produce both a site description and a plant description, and to conduct a safety analysis. The Forsmark...

...ABSTRACT: This article demonstrates the effects of regional hard rock mining in several case studies of shallow stope cave-in failures. Applicable numerical modeling methods indicate that destressing of the rock mass is in effect under such extensive mining, which facilitates the occurrence...

... introduces distinct behaviour of rock masses, leading to parting and failure of layers. The evaluation of performance of such conditions requires distinct procedures other than those applied in unstratified, but otherwise jointed rock masses. Metal mine rock masses can contain extensive, parallel...

...1. INTRODUCTION The stability of wedges formed around underground excavations in blocky rock masses is a common problem in rock engineering. The wedges are formed by intersecting discontinuities and the free face created through excavation of an underground opening. Under the influence of gravity...

..., UK M.R.Asef The Ministry 0/ Culture and Higher Education 0/ Iran (MCHE) ABSTRACT: In this paper the use of a novel design tool for the early stages of a tunnelling project is demon- strated. By applying this tool to evaluate the influence of support capacity and yield in a wide range of rock mass...

...Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Balkema, Rotterdam. ISBN 90 5809 1554 Detection of rock mass weakness ahead of a tunnel- A numerical study ETonon & B.Amadei Department of Civil Engineering, University of Colorado, Boulder, Colo., USA ABSTRACT: In tunneling, the prompt...

... in tenns of strength properties of the rock mass. Geotechnical aspects of fault characterization and problems of investigating a tunnel in a fault zone arc discussed. It is demon- strated that a technical and economical optimization of construction can only be achieved by a flexible eon- tractual setup...

... ABSTRACT ABSTRACT: This paper presents a case study whereby oriented borehole data were used to characterize a rock mass. In particular the influence of random joints in the resulting block size distribution is investigated and its implications discussed. The analysis can contribute...

... ABSTRACT ABSTRACT: A method utilizing surface refraction seismic geophysical measurements to estimate earthwork factors involving large rock cuts in weathered, fractured rock masses and associated embankments has been developed. The method uses Percolation Theory (PT) concepts to relate rock...

... dony detection digital image rock mass automatic construction algorithm multiple response metals & mining discontinuity trace map location error application operator detector mapping recognition rate Johnson structural feature Pacific Rocks 2000, Girard, Liebman, Breeds & Doe...

... subsidence. This was evaluated by use of two approaches: the semi-empirical Rock Mass Rating used to evaluate stability of under- ground openings; and use of analytical limit rium techniques as described below. The semi-empirical Rock Mass Rating for design of underground openings (Bieniawski, 1984) indi...

... in place and generate possibly uniform stress at the contact between the sets and rock mass. This analysis provides an example of the assessment of the data collected from the field measurements. Steel set strain gage data are used to assess the magnitude of ground loads acting on an individual set...

... ABSTRACT ABSTRACT: A small-scale field explosion test was conducted in granite to investigate the dynamic response of jointed rock masses under explosion loads. The test is modeled by using the discrete element code, 3DEC, an extension of the Universal Distinct Element Code (UDEC) from two...

... of the rock masses are selected as the main parameters to be determined. The so called back analysis shows that, after grouting, the stiffnesses of the filled joint are increased up to 6 times compared with those of the fresh joint. joint stiffness reinforcement borehole numerical approach shear...

... reservoir geomechanics rockmass rock bolt rock mass geometrical arrangement auxiliary stress deformation compatibility Reservoir Characterization Engineering strain energy SCM Upstream Oil & Gas rockbolt constituent material support composite material support system equation...