In most backfill
operations, the transition stations where two pipelines split consists of multiple high-pressure pipes.
Therefore, to account for stress from external backfill
, a 10-mm annular plate is usually selected.
Ventilation was provided across the top of the entire backfill
until the final lift was poured and the backfill
After removal of internal pressure and backfill
loads, no damage, tear, fracture, bending or compromise of structural integrity was recorded in rough or smooth hole plugs.
Country: AustraliaSector: Machinery/EngineeringTarget: Backfill
Specialists Pty LtdBuyer: Outotec OyjType: Corporate acquisitionStatus: Closed
The final requirement based on a test stopes back analysis, backfill
with compressive strength 4 MPa, was sufficient for normal mine operation.
12) Specifically, the government instructed Lamb to remove the backfill
encasing the failed ductwork, to place pea gravel as backfill
under, over, and around the ductwork, and then to place flexible connectors at the duct connections.
However, these analyses does not consider the variation of wall thrust due to the development of excess pore pressure in the backfill
when they determine the yield acceleration; therefore, previous analyses are inappropriate for the design of quay walls with saturated backfill
soils, where high excess pore pressure can develop during earthquakes.
Expenditures in a typical demolition and construction project under the conventional approach include transportation to the landfill, disposal charges, buying backfill
materials, and paying for the transportation of these backfill
materials to the site.
The gauge can also monitor pump-down, check base pressure and backfill
gases with its direct reading Piezo sensor for rough vacuum and MircoPirani sensor for medium vacuum.
This offers great potential for backfill
surface tailings disposal.