Backfill


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backfill

[′bak‚fil]
(civil engineering)
Earth refilling a trench or an excavation around a building, bridge abutment, and the like.
(mining engineering)
Waste sand or rock used to support the mine roof after removal of ore.

Backfill

Crushed stone or coarse soil placed around the foundation walls to provide drainage for water collecting in the soil behind the wall.

backfill

Soil which is replaced in an area that has been excavated previously.

backfilling, backfill

1. Rough masonry built behind a facing or between two faces.
2. Filling over the extrados of an arch.
3. Brickwork in spaces between structural timbers. Also see nogging
4. Soil or crushed stone used to fill the space between the excavation or sheeting and the exterior of a structure, or around the foundation walls to provide means for water to drain away from a foundation.
References in periodicals archive ?
The vertical displacement of the backfill with a concentration of 76% is small, the amount of roof subsidence is 2.65 cm, and the amount of bottom uplift is 2.43 cm when the lime-sand ratio is 1:6.
Zhang, "Load bearing and deformation characteristics of granular spoils under unconfined compressive loading for coal mine backfill," Advances in Materials Science & Engineering, vol.
The composition of iron tailings and 32.5 Portland cement used in the experiments is based on the practical backfill situation of iron mines from China.
where z is the depth of backfill and [K.sub.S0] and t are undetermined parameters.
In case of tank empty condition, the external earth pressure of backfill all around acts on the shell, which needs to be resisted by stiffening of shell plate at required intervals along the height of the tank.
Some possible minor changes include: (1) adjustment of the low-density concrete strength, (2) adding an additional recovery chute, and (3) modifying the type and/or length of some bolts, especially in the transition zone of the Phase 1 and Phase 2 concrete backfill.
Concept and Principles of Paste Backfill Mining Technology
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.
In August, the company bought another Australian firm, mining services company TME Group Pty Ltd.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.
Since there is always a the and/or other apparatus on the end of the barrel in a production situation, the screw necessarily backfills for a certain distance to develop the pressure necessary to overcome the resistance caused by these elements.
Finally backfill with soil a bit at a time, jiggling the tree to shake the soil between the roots and firm down well.