Mine/Quarry
Abandoned and active mines and quarries can develop problems that can be remedied with geotechnical construction techniques. Grouting and soil mixing techniques control seepage from tailings and stabilize tailings and soil. Compaction and cement grouting cuts off contaminated water flow in decant lines. Compaction grouting and fire retardant foam suppress underground coal fires. Permanently cased holes can be drilled into burning coal seams for the installation of monitoring instrumentation. Compaction grouting mitigates subsidence by filling mine voids. Large-volume voids can be filled using low-cost sand or tailings made pumpable with a foam medium. Hayward Baker is innovative in approaching mine and quarry challenges.