... . Laboratory studies in granites and limestones have also revealed a direct correlation between breakout dimensions (breakout length, and angular span at the borehole wall) and the far-field principal stress magnitudes [5,6]. An important practical application of this finding was the field use of logged...

... ABSTRACT: In this paper, we describe a method to estimate, in real-time, the volume of a hydraulic fracture from tiltmeter measurements recorded during the treatment. The resolution of fracture dimensions and orientation is discussed at first. A limit, expressed in terms of the distance...

... that actually occurred and the performance of the remedial measures. risk and uncertainty assessment dimension metals & mining mitigation measure study area discontinuity risk assessment roughness risk management colluvium mitigation surface description boulder catalog effective...

..., neither drill-bit penetration rate, nor drilling-fluid flowrate, had a discernable effect on breakout dimensions or shape. One consistent characteristic of fracture-like breakouts, regardless of testing conditions, was their near-constant width, which averaged 3.3±0.3 mm in all tests. Long breakouts...

... a1., 1987; Ghosh. 1990; Cox and Meredith, 1993) and historical records of rock bursts in mines (Xie and Pariseau, 1993 Initially the fractal dimension increases with load- ing indicating almost random formation of micro- cracks in the three-dimensional space. This phe- nomenon continues until...

... by the bulk strain measure + z) ! 3, according to N = k( v )m (6) in which k and m are material constants to be deter- mined from strain rate dependent tensile fracture stress data. The average crack dimension a, is esti- mated from the nominal fragment diameter for dynamic fragmentation in a brittle material...

...) is of no importance. This conclusion is also confirmed by the fragment size - frequency distribution analysis of rubble in the drifts. If in the homogeneous non-destructive medium for the fragment size - frequency distribution received as a result of destruction a strong dependence of average piece dimension versus...

... in porosity in three dimensions compared toareal density in two dimensions. Accordingly, simulation of the volumetric response of rock under different stress conditions will require athree-dimensional model not restricted tospherical particles. 1INTRODUCTION Rock compressibility is a fundamentally important...

.... These calculations had for objective the localization of zones with high stresses. Others calculations using the bidimensionnal FLAC code had for objective to explain the rupture mechanism of the RC2 pillar, then to determine the level of stresses acceptable by a pillar according to its dimensions. During 1994...

... on estimated D. The computer program was then applied to dif- ferent block sizes sampled from three generated two dimensional joint patterns to estimate the box fractal di- mension. Results indicated that the box fractal dimension can capture the combined influence of joint size distribution and joint density...

... failure models. This strongly indicates a self-similar behavior of seismic sources. metals & mining attenuation displacement spectra Reservoir Characterization strength McGarr Upstream Oil & Gas Brune dimension source parameter seismicity frequency source radius Sudbury Basin...

... Characterization Simulation matrix block discrete fracture model fractured reservoir dimension application well orientation heterogeneous connectivity discrete fracture approach Rock mechanics rock mass fracture orientation geometry continuum model reservoir Rock Mechanics, Nelson & Laubach (eds...

... mass is a three-dimensional problem which challenges the traditional description. Fractal geometry, an effective tool exploring complexity of the nature, provides a better avenue for studying flow network and percolation surfaces. The concept of fractal dimensions was introduced by Benoit Mandelbrot...

... not yield the same fractal dimension. In this paper, we worked exclusively with horizontal 798 planes. However, the volumetric organization of the fractures can be studied with a representative three-dimensional point set by sequentially selecting those points lying within thin tabular regions that cut...

... dimension melange frequency distribution Reservoir Characterization Upstream Oil & Gas Proportion graphic model block areal proportion diameter volumetric proportion areal proportion intercept block lineal proportion chord intercept scanline block-in-matrix rock Medley...