Triaxial deformation experiment datafiles to test two methods of measuring yield strength of porous mudstones and sandstones

The datafiles are text files that record the pore fluid pressure, confining pressure, pore volume change, axial force and axial load displacement recorded on the triaxial deformation apparatus during an axial load cycle on a porous rock sample. Each data file represents an individual load cycle from the contact of the loading apparatus to the yield strength, as identified by the user during the experiment. Samples tested included members of the Idaho Gray Sandstone, Mercia Mudstone Group, and lab manufactured synthetic sandstones. The data is associated with submission of the manuscript: 'Porous rock yield strength mapping: single sample probing versus multi-sample conventional measurements.' to the journal Rock Mechanics and Rock Engineering.

Date (Creation): 2026-07-01

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13608740

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Liverpool	Professor Daniel Faulkner	not available	Originator
University of Liverpool	Isabel Ashman	not available	Originator
University of Liverpool	Michael J. Allen	not available	Originator
Jacobs	John D. Bedford	not available	Originator
Shell	Elliot Rice-Birchall	not available	Originator
British Geological Survey	Enquiries	not available	Distributor
British Geological Survey	Enquiries	not available	Point of contact

Maintenance and update frequency: notApplicable

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Porosity
Yield strength
Strain
Stress

dataCentre

Keywords

NERC_DDC

Access constraints: Other restrictions

Other constraints: licenceOGL

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints: Other restrictions

Other constraints: The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints: Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Language: English

Topic category

Geoscientific information

Begin date: 2017-03-03

End date: 2026-02-27

Reference System Information

No information provided.

Distribution format

Name	Version
Text file (TXT)

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	not available	Distributor

OnLine resource

Protocol	Linkage	Name
WWW:DOWNLOAD-1.0-http--download	https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192627	Data

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--related	https://doi.org/10.5285/12387842-3003-46cc-9b0c-dbae48727c6d	Citation Information - Digital Object Identifier (DOI)

Hierarchy level: Non geographic dataset

Other: non geographic dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: Data were collected in the Rock Deformation Laboratory at the University of Liverpool. The data on the Idaho Gray Sandstone were collected by Dr. J. Bedford between Mar 2017-Apr 2018. The data on the synthectic sandstones was conducted by Dr. E. Rice-Birchall between Jun 2019-Aug 2020. Finally, the Mercia Mudstone Group data were collected by Dr. I. Ashman in Jan & Feb 2026. The Idaho Gray Sandstones were investigated in Dr. John Bedford's PhD project and has been previously published in the Journal of Geophysical Research (Bedford et al., 2019). Similarly, the synthetic sandstone research project was included in Dr. Elliot Rice-Birchall's PhD and has been previously published in the International Journal of Rock Mechanics and Mining Sciences (Rice-Birchall et al., 2021). The Mercia Mudstone Group samples and data form part of NERC and NWS jointly funded GeoSafe consortium.