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Large excavations and their effect on displacement of land boundaries

Journal Article


Abstract


  • A study to estimate land surface movement caused by large surface excavations in sedimentary strata is

    presented. In stratified or jointed strata the stress relief driven movement adjacent to large excavations

    can be significantly larger than expected. High lateral stresses measured in Australia and other places

    around the world indicate that the ratio of horizontal to vertical stress has been particularly high at shallow

    depths. The in situ strata is in compression and during excavation, stress is relieved towards the

    opening causing strata movement. Large excavations such as, open cut mines or highway cuttings, can

    initiate an extensive horizontal slide of surface layers towards the excavation. These ground movements

    can be damaging to surface structures such as water storage dams and large buildings. Based on stress

    measurements at shallow depths in Australian coal mines the study presented here calculates and models

    the extent of potential ground movement along the bedding surface adjacent to large excavations and

    provides a new prediction tool of land movement at the excavation boundary that can benefit the geotechnical

    practitioners in the mining industry.

Publication Date


  • 2012

Citation


  • Nemcik, J., Aziz, N. & Ren, T. (2012). Large excavations and their effect on displacement of land boundaries. International Journal of Mining Science and Technology, 22 (5), 633-637.

Scopus Eid


  • 2-s2.0-84868201772

Ro Metadata Url


  • http://ro.uow.edu.au/coal/385/

Number Of Pages


  • 4

Start Page


  • 633

End Page


  • 637

Volume


  • 22

Issue


  • 5

Abstract


  • A study to estimate land surface movement caused by large surface excavations in sedimentary strata is

    presented. In stratified or jointed strata the stress relief driven movement adjacent to large excavations

    can be significantly larger than expected. High lateral stresses measured in Australia and other places

    around the world indicate that the ratio of horizontal to vertical stress has been particularly high at shallow

    depths. The in situ strata is in compression and during excavation, stress is relieved towards the

    opening causing strata movement. Large excavations such as, open cut mines or highway cuttings, can

    initiate an extensive horizontal slide of surface layers towards the excavation. These ground movements

    can be damaging to surface structures such as water storage dams and large buildings. Based on stress

    measurements at shallow depths in Australian coal mines the study presented here calculates and models

    the extent of potential ground movement along the bedding surface adjacent to large excavations and

    provides a new prediction tool of land movement at the excavation boundary that can benefit the geotechnical

    practitioners in the mining industry.

Publication Date


  • 2012

Citation


  • Nemcik, J., Aziz, N. & Ren, T. (2012). Large excavations and their effect on displacement of land boundaries. International Journal of Mining Science and Technology, 22 (5), 633-637.

Scopus Eid


  • 2-s2.0-84868201772

Ro Metadata Url


  • http://ro.uow.edu.au/coal/385/

Number Of Pages


  • 4

Start Page


  • 633

End Page


  • 637

Volume


  • 22

Issue


  • 5