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 was completed.
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.
This week, the LAPD and city officials haggled over whether to
backfill 12 or 13 positions of officers moving to the new station.
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.
