Comparison of methods for calculating geometrical characteristics of discontinuities in a cavern of the Rudbar Lorestan power plant

Bandpey, Abbas Kamali; Shahriar, K.; Sharifzadeh, Mostafa; Marefvand, Parviz

doi:10.1007/s10064-017-1145-x

Cited by 6 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of modern applied geoscience studies, such as in groundwater modelling (Babadagli, 2001), geothermal energy (Hitchmough et al, 2007) and geotechnical engineering (Bandpey et al, 2019), use only field-based methods to gather fracture network data. Field measurements of geometry and density of fracture networks are used to understand the mechanical and hydraulic properties of a rock mass (Babadagli, 2001;Maréchal et al, 2004;Siddique et al, 2015).…”

Section: Overview Of Case Studiesmentioning

confidence: 99%

“…In these studies, field time and accessibility of the outcrop are a major consideration for the type and amount of fracture data collected. When time is limited, a 1-D method is used to collect fracture data (Bandpey et al, 2017), whereas the new digital method would allow full 2-D fracture traces to be collected efficiently. In studies that look at slope stability on narrow mountain roads in the Himalayas (Siddique et al, 2015), limited fracture data are used in rock-quality calculations, which is likely due to a combination of time constraints and the inaccessibility of the outcrop.…”

Section: Overview Of Case Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

et al. 2020

View full text Add to dashboard Cite

Abstract. Understanding the impact of fracture networks on rock mass properties is an essential part of a wide range of applications in geosciences from understanding permeability of groundwater aquifers and hydrocarbon reservoirs to erodibility properties and slope stability of rock masses for geotechnical engineering. However, gathering high-quality, oriented-fracture datasets in the field can be difficult and time-consuming, for example, due to constraints on field work time or access (e.g. cliffs). Therefore, a method for obtaining accurate, quantitative fracture data from photographs is a significant benefit. In this paper we describe a method for generating a series of digital fracture traces in a geographic information system (GIS) environment, in which spatial analysis of a fracture network can be carried out. The method is not meant to replace the gathering of data in the field but to be used in conjunction with it, and it is well suited when field work time is limited or when the section cannot be accessed directly. The basis of the method is the generation of the vector dataset (shapefile) of a fracture network from a georeferenced photograph of an outcrop in a GIS environment. From that shapefile, key parameters such as fracture density and orientation can be calculated. Furthermore, in the GIS environment more complex spatial calculations and graphical plots can be carried out such as heat maps of fracture density. Advantages and limitations compared to other fracture network capture methods are discussed.

show abstract

Section: Overview Of Case Studiesmentioning

confidence: 99%

Section: Overview Of Case Studiesmentioning

confidence: 99%

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…ese numerical methods include the discrete element method [11], boundary element method [12,13], and displacement discontinuity method [5]. In recent decades, a numerical simulation code, the cellular automaton (CA) method [14][15][16][17][18], with local consideration and parallel characteristics has been proposed to simulate the failure processes of rock materials under the uniaxial and polyaxial compression condition. Cellular Automata Software for engineering Rockmass fracturing processes (CASRock) was developed, which can commendably simulate the failure process of heterogeneous rocks and the fracturing process of engineering rock mass [19].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Strength and Failure Behavior of Precracked Marble under True Triaxial Compression

Han

Zhao

2021

Shock and Vibration

View full text Add to dashboard Cite

Cracks play an important role in evaluating the strength and failure behavior of engineering rock mass. In order to increase the understanding of strength and failure mechanism of precracked rock, crack propagation and coalescence from preexisting cracks under true triaxial compression are investigated using true triaxial compression tests and Cellular Automata Software for engineering Rockmass fracturing process (CASRock). Three types of specimens were studied experimentally and numerically. Experimental and numerical results show that both the preferential angle and areal intensity of preexisting cracks can affect the compressive strength and failure behavior of the specimens. The peak strength firstly decreases and then increases with increase of the preferential angle. Also, the peak strength nonlinearly decreases with the increase of cracks’ areal intensity. The numerical results show that the crack initiation and coalescence are observed and characterized from the inner and outer tips of preexisting cracks in specimens containing single crack and multiple parallel cracks. The main shear failure in the specimen containing multiple unparallel preexisting cracks initiate and propagate from one of the macroscopic preexisting cracks, and other preexisting cracks do not initiate, propagate, and coalesce until reaching the peak strength.

show abstract

“…Ferrero and Umili [20] compared the existing fracture intensity estimation method and applied them to the North face of Aiguille du Marbree. Bandpey et al [21] made a comparison of the methods for calculation geometrical characteristics of discontinuities in a cavern of the Rudbar Lorestan power plant. Kamali et al [22] focused on fisher constant to research effect of shape and size of sampling window on the determination of intensity of trace discontinuity.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Estimating Rock Discontinuity Trace Intensity Based on Rectangular Sampling Windows

Huo

Tang

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Trace intensity is defined as mean total trace length of discontinuities per unit area, which is an important geometric parameter to describe fracture networks. The probability of each trace appearing in the sampling surface is different since discontinuity orientation has a scatter and is probabilistically distributed, so this factor should be taken into account in trace intensity estimation. This paper presents an approach to estimate the two-dimensional trace intensity by considering unequal appearing probability for discontinuities sampled by rectangular windows. The estimation method requires the number of discontinuities intersecting the window, the appearing probability of discontinuities with both ends observed, one end observed, and both ends censored, and the mean trace length of discontinuities intersecting the window. The new estimator is validated by using discontinuity data from an outcrop in Wenchuan area in China. Similarly, circular windows are used along with Mauldon’s equation to calculate trace intensity using discontinuity trace data of the same outcrop as a contrast. Results indicate that the proposed new method based on rectangular windows shows close accuracy and less variability than that of the method based on circular windows due to the influence of finite sample size and the variability of location of the window and has advantage in application to sampling surfaces longer in one direction than in the other such as tunnel cross sections and curved sampling surfaces such as outcrops that show some curvature.

show abstract

Comparison of methods for calculating geometrical characteristics of discontinuities in a cavern of the Rudbar Lorestan power plant

Cited by 6 publications

References 30 publications

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

Data acquisition by digitizing 2-D fracture networks and topographic lineaments in geographic information systems: further development and applications

Experimental and Numerical Study of Strength and Failure Behavior of Precracked Marble under True Triaxial Compression

A New Approach for Estimating Rock Discontinuity Trace Intensity Based on Rectangular Sampling Windows

Contact Info

Product

Resources

About