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POSIVA Report 1997-12

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Name:

Principles of Mechanical Excavation

Writer:

Arne Lislerud

Language:

English

Page count:

244

ISBN:

951-652-037-5; 1239-3096

Summary:

Working report: POSIVA-raportti POSIVA-97-12, 186 + liitteet sivua
ISBN 951-652-037-5


PRINCIPLES OF MECHANICAL EXCAVATION


ABSTRACT

Mechanical excavation of rock today includes several methods such as tunnel boring,
raiseboring, roadheading and various continuous mining systems. Of these raiseboring is
one potential technique for excavating shafts in the repository for spent nuclear fuel and
dry blind boring is promising technique for excavation of deposition holes, as
demonstrated in the Research Tunnel at Olkiluoto. In addition, there is potential for use
of other mechanical excavation techniques in different parts of the repository. One of the
main objectives of this study was to analyze the factors which affect the feasibility of
mechanical rock excavation in hard rock conditions and to enhance the understanding of
factors which affect rock cutting so as to provide an improved basis for excavator
performance prediction modeling. The study included the following four main topics: a)
phenomenological model based on similarity analysis for roller disk cutting, b) rock
mass properties which affect rock cuttability and tool life, c) principles for linear and
field cutting tests and performance prediction modeling and d) cutter head lacing design
procedures and principles. As a conclusion of this study, a test rig was constructed, field
tests were planned and started up. The results of the study can be used to improve the
performance prediction models used to assess the feasibility of different mechanical
excavation techniques at various repository investigation sites.

Keywords: mechanical excavation, cuttability, drillability


POSIVA-raportti POSIVA-97-12, 186 + liitteet sivua
ISBN 951-652-037-5


PRINCIPLES OF MECHANICAL EXCAVATION


ABSTRACT

Mechanical excavation of rock today includes several methods such as tunnel boring,
raiseboring, roadheading and various continuous mining systems. Of these raiseboring is
one potential technique for excavating shafts in the repository for spent nuclear fuel and
dry blind boring is promising technique for excavation of deposition holes, as
demonstrated in the Research Tunnel at Olkiluoto. In addition, there is potential for use
of other mechanical excavation techniques in different parts of the repository. One of the
main objectives of this study was to analyze the factors which affect the feasibility of
mechanical rock excavation in hard rock conditions and to enhance the understanding of
factors which affect rock cutting so as to provide an improved basis for excavator
performance prediction modeling. The study included the following four main topics: a)
phenomenological model based on similarity analysis for roller disk cutting, b) rock
mass properties which affect rock cuttability and tool life, c) principles for linear and
field cutting tests and performance prediction modeling and d) cutter head lacing design
procedures and principles. As a conclusion of this study, a test rig was constructed, field
tests were planned and started up. The results of the study can be used to improve the
performance prediction models used to assess the feasibility of different mechanical
excavation techniques at various repository investigation sites.

Keywords: mechanical excavation, cuttability, drillability


Keywords:

mechanical excavation; cuttability; drillability

File(s):

Principles of Mechanical Excavation (pdf) (12.1 MB)


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