Discontinuity spacings in rock

Priest, Stephen D.; Hudson, John C.

doi:10.1016/0148-9062(76)90818-4

Cited by 601 publications

(195 citation statements)

References 8 publications

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“…These steeply dipping, subparallel fractures generally strike perpendicular to the current regional least principal stress, and the spatial frequency of their cleavage, h, is proportional to the thickness of the lithologic unit, H (Fig. 4;Priest and Hudson 1976;Bai and Pollard 2000). Transmissivities associated with these fractures are not particularly sensitive to changes in vertical loading over the relatively shallow depths observed in well logging (Morin et al 1997).…”

Section: Tectonic Settingmentioning

confidence: 97%

Effects of crustal stresses on fluid transport in fractured rock: case studies from northeastern and southwestern USA

Morin

Savage

2003

Hydrogeology Journal

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Section: Tectonic Settingmentioning

confidence: 97%

Effects of crustal stresses on fluid transport in fractured rock: case studies from northeastern and southwestern USA

Morin

Savage

2003

Hydrogeology Journal

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“…Hooker et al (2013)), it is defined as the area of the fracture face (length and aperture) for the present two-dimensional study. Fracture-size distributions have been found to either being centred onto a specific value with fewer smaller or larger values present (Priest & Hudson 1976) or are scale-independent for example in power-law size distributions (Ortega et al, 2006).…”

Section: Cleat Length Aperture and Size Distributionmentioning

confidence: 99%

Image processing based characterisation of coal cleat networks

Busse

Dreuzy

Galindo‐Torres

et al. 2017

International Journal of Coal Geology

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Characterisation of the cleat network serves as the basis for estimating the hydraulic and mechanical seam properties which in turn are fundamental for flow and geomechanical modelling in the context of underground coal mining. Cleat and cleat network geometry can be described as a function of frequency, aperture, size, orientation relative to in situ stresses, connectivity and porosity, with mineralised and un-mineralised cleats occurring. To describe these properties, CTscans of core samples of a Bowen Basin coal in central Queensland, Australia, are analysed.A unique image processing workflow method is introduced to extract the key statistical parameters of perpendicular butt and face cleats present in a two-dimensional image. As face and butt cleats have different characteristics, the presented method distinguishes face cleats and butt cleats by direction and present detailed data for both cleat types. The results comprise cleat length, apertures, sizes, intensities, densities, shape parameter, spacing, orientation and connectivity and are therefore more comprehensive than previous cleat descriptions. Three generally different cleat geometries are considered within this study, one sample shows perpendicular face and butt cleats, the second two sets of face cleats intersected by butt cleats and the third parallel face cleats only.

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“…Priest and Hudson (1976) [10] found that a reasonable estimate of RQD could be obtained from discontinuity spacing measurements made on core or from an exposure by use of the equation:…”

Section: Rqd Determined From Face Mapsmentioning

confidence: 99%

UGC Gold Mining Company strategy of ecologically sound development of Darasun and Talatuy gold ore deposits

Anoshina¹,

Esina²

2017

gzh

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ABSTRACT:The original Geological Strength Index chart was developed on the assumption that observations of the rock mass would be made by qualified and experienced geologists or engineering geologists. With the ever increasing use of the GSI chart as the basis for the selection of input parameters for numerical analysis, often by individuals without the strong geologic understanding of rock mass variability necessary to interpret the graphical GSI chart properly, some uniformity and quantification of the chart seems necessary. This paper presents a proposed quantification of the GSI chart on the basis of two well-established parameters -Joint Condition and RQD. Recommendations for future development of more robust scales are presented.

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Discontinuity spacings in rock

Cited by 601 publications

References 8 publications

Effects of crustal stresses on fluid transport in fractured rock: case studies from northeastern and southwestern USA

Effects of crustal stresses on fluid transport in fractured rock: case studies from northeastern and southwestern USA

Image processing based characterisation of coal cleat networks

UGC Gold Mining Company strategy of ecologically sound development of Darasun and Talatuy gold ore deposits

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