STP1129

    Design and Construction of a Plastic Concrete Cutoff Wall for the Island Copper Mine

    Published: Jan 1992


      Format Pages Price  
    PDF (476K) 18 $25   ADD TO CART
    Complete Source PDF (9.1M) 18 $55   ADD TO CART


    Abstract

    A plastic concrete slurry wall was constructed at the Island Copper Mine on Vancouver Island to prevent excessive seepage from the ocean into a large copper mine open pit during a south wall push-back which would lead to pit slope stability problems and flooding. An unusually low strength plastic concrete was chosen as a backfill to sustain relatively large deformations without cracking and to resist erosion if a crack should develop. Very difficult construction problems were successfully surmounted including excavation through a loose, pervious mine rock waste dump and embedding the toe of the wall into a very hard glacial till. Pit slope excavation has been completed through the cutoff soils without problem.

    Keywords:

    Slurry wall, mine, open pit, slope stability, seepage, bentonite, plastic concrete, copper, glacial till, finite element analysis, clamshell


    Author Information:

    Davidson, RR
    Senior Associate, Woodward-Clyde Consultants, Denver, Colorado

    Denise, G
    Senior Staff Engineer, Woodward-Clyde Consultants, Denver, Colorado

    Findlay, B
    Mine Maintenance General Foreman, BHP-Utah Mines, Ltd., British Columbia,

    Robertson, RB
    Engineering Manager, BHP-Utah Mines, Ltd, British Columbia,


    Paper ID: STP19739S

    Committee/Subcommittee: D18.20

    DOI: 10.1520/STP19739S


    CrossRef ASTM International is a member of CrossRef.