Physical and numerical modeling study of jointed rock block strength under uniaxial loading

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To simulate soft rocks, (a) a mixture of plaster of Paris, sand and water was used as a model material. Thin galvanized sheets were used to create joints in blocks made out of the model material To investigate the failure modes and strength, jointed model material blocks of size 30 × 12.5 × 8.6cm having different joint geometry configurations were subjected to uniaxial compressive loading. Results indicated three failure modes: (a) tensile failure through intact material, (b) a combined shear and tensile failure through joints, and (c) a mixed failure of the above two modes depending on the joint geometry. The fracture tensor of a jointed mass has the capability of integrating the effects of number of fracture sets, fracture density, and distributions for size and orientation of these fracture sets. The fracture tensor component in a certain direction provides the directional effect of the fracture tensor. Results obtained from the experiments were used to develop a strong non-linear relation between the fracture tensor component and the jointed model mass strength Some of the laboratory experiments conducted on jointed model material blocks were simulated numerically using the distinct element method. Obtaining good agreements between the experimental and numerical results through the distinct element method was found to be not a trivial exercise. However, with careful selection of suitable material constitutive models for intact material and model joints and accurate estimation of parameters of the constitutive models through laboratory testing, it seems possible to obtain good agreements between the experimental and distinct element numerical results.

Original languageEnglish (US)
Title of host publication4th North American Rock Mechanics Symposium, NARMS 2000
PublisherAmerican Rock Mechanics Association (ARMA)
Pages1195-1202
Number of pages8
ISBN (Print)9058091554, 9789058091550
StatePublished - Jan 1 2000
Event4th North American Rock Mechanics Symposium, NARMS 2000 - Seattle, United States
Duration: Jul 31 2000Aug 3 2000

Other

Other4th North American Rock Mechanics Symposium, NARMS 2000
CountryUnited States
CitySeattle
Period7/31/008/3/00

Fingerprint

rock block
Rocks
rocks
Tensors
modeling
tensors
distinct element method
Constitutive models
failure modes
Failure modes
Calcium Sulfate
plasters
Geometry
geometry
soft rock
physical exercise
material
sands
Sand
Experiments

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Kulatilake, P., & Gao, H. (2000). Physical and numerical modeling study of jointed rock block strength under uniaxial loading. In 4th North American Rock Mechanics Symposium, NARMS 2000 (pp. 1195-1202). American Rock Mechanics Association (ARMA).

Physical and numerical modeling study of jointed rock block strength under uniaxial loading. / Kulatilake, Pinnaduwa; Gao, H.

4th North American Rock Mechanics Symposium, NARMS 2000. American Rock Mechanics Association (ARMA), 2000. p. 1195-1202.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kulatilake, P & Gao, H 2000, Physical and numerical modeling study of jointed rock block strength under uniaxial loading. in 4th North American Rock Mechanics Symposium, NARMS 2000. American Rock Mechanics Association (ARMA), pp. 1195-1202, 4th North American Rock Mechanics Symposium, NARMS 2000, Seattle, United States, 7/31/00.
Kulatilake P, Gao H. Physical and numerical modeling study of jointed rock block strength under uniaxial loading. In 4th North American Rock Mechanics Symposium, NARMS 2000. American Rock Mechanics Association (ARMA). 2000. p. 1195-1202
Kulatilake, Pinnaduwa ; Gao, H. / Physical and numerical modeling study of jointed rock block strength under uniaxial loading. 4th North American Rock Mechanics Symposium, NARMS 2000. American Rock Mechanics Association (ARMA), 2000. pp. 1195-1202
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