Journal Published Online: 01 December 2000
Volume 23, Issue 4

Laboratory Evaluation of Cemented Backfill Materials for Mines

CODEN: GTJODJ

Abstract

A brief state-of-the-art review is given on backfill materials and laboratory tests. A new system developed for testing backfill material in the laboratory is described. In this system, most of the limitations of previously applied techniques have been eliminated. In performing unconfined-deformability tests (UDT) and confined-deformability tests (CDT), large cylindrical specimens having a diameter of 600 mm are used. The specimens were prepared from riverbed sand and gravel mixed with cement. A total of 135 UDT and 127 CDT specimens were tested in order to investigate the strength and deformability characteristics of 40 different combinations of backfill mixture. Calculation methods are evaluated in terms of stress-strain plots and are illustrated with examples. Typical results are presented. Two sets of deformation data can be obtained during testing: one from between the top and bottom plates, and the other from between the rings peripherally fixed onto the specimen. It is shown in this study that ring-to-ring readings provide more reliable modulus results.

Author Information

Unal, E
Middle East Technical University, Department of Mining Engineering, Inonu Bulvari, ODTU, Ankara, Turkey
Cakmakci, G
Middle East Technical University, Department of Mining Engineering, Inonu Bulvari, ODTU, Ankara, Turkey
Pages: 10
Price: $25.00
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Details
Stock #: GTJ11070J
ISSN: 0149-6115
DOI: 10.1520/GTJ11070J