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Rock Mechanics and Rock Engineering

, Volume 50, Issue 8, pp 2235–2242 | Cite as

Establishing Empirical Relationships for the Effects of Water Content on the Mechanical Behavior of Gosford Sandstone

  • Hossein MasoumiEmail author
  • James Horne
  • Wendy Timms
Technical Note

Introduction

Mechanical properties of intact rocks, such as uniaxial compressive strength (UCS), Young’s modulus (E) and tensile strength (TS), are the key factors in rock engineering and are commonly the first parameters to be characterized for any designing process. In many projects, point-load index (PLI) is measured to indirectly estimate the UCS of the intact rock. The influence of water on the mechanical behavior of rocks can be problematic for the stability of rock mass in different civil and mining structures. Many studies have attempted to address these effects experimentally and analytically (Duda and Renner 2013; Erguler and Ulusay 2009; Fischer and Paterson 1992; Hawkins and McConnell 1992; Lisabeth and Zhu 2015; Nicolas et al. 2016; Ojo and Brook 1990; Rutter 1974; Wong and Jong 2014; Zhou et al. 2016), and it has been confirmed by different researchers that an increase in water content can lead to a decrease in the strength of intact rock (Baud et al. 2000; Chenevert 1970...

Keywords

Gosford sandstone Uniaxial compressive strength Point-load index Tensile strength Water content 

List of symbols

UCS

Uniaxial compressive strength

E

Young’s modulus

PLI

Point-load index

TS

Tensile strength

ω

Water content

Mps

Mass of rock sample under partially saturated condition

Md

Mass of dry rock sample

r

Radius of the sample

H

Hydraulic diffusivity

k

Permeability

B

Skempton’s coefficient

K

Bulk modulus

η

Fluid viscosity

α

Biot’s coefficient

P

Maximum applied load measured during the point loading

D

Distance between two pointers (conical platens) in diametral point-load test which is also the core sample diameter

L

Length of the core sample

F

Peak load measured during the Brazilian or indirect tensile test

T

Thickness of the sample measured at the center

σn

Nominal strength such as UCS, E, PLI, TS

a, b and c

Material constants in Hawkins and McConnell (1992) model

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Copyright information

© Springer-Verlag Wien 2017

Authors and Affiliations

  1. 1.School of Mining EngineeringUNSW AustraliaSydneyAustralia

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