Reexcavation

Reexcavation

 

the repeated excavation of rock, done in open-pit mining of mineral deposits and during earth moving in construction. Excavators, usually draglines, and single-bucket loaders are used. Reexcavation is often done in surface mines with complex flow sheets, where stripped overburden is reloaded into the area already worked. In these cases the insufficient working dimensions of the stripping excavator cause the stripped debris to partially or completely fall back onto the extraction bench. To clear the bench and increase the area of the work face, a pit dump excavator reexcavates part of the rock from the initial pile. The ratio of the reexcavated rock to the total amount initially excavated is called the reexcavation factor, or the factor of repeated dumping. The reexcavation factor is usually 0.5–1.

References in periodicals archive ?
Tenders are invited for Construction of concrete road from kaunchouki to purbachilka bazar and reexcavation of rasgachhtala sluice outfall and adjacent nayajali at radhaballavchak g.
Oaktree also announced that Vac One's first acquisition is Houston, TX-based Texas ReExcavation, LC (“T-Rex Services”).
Difficulty of using process flowsheet with application as the mining equipment, and drag-line excavator as the overburden equipment, consists in reexcavation of large volumes of overburden rock in the course of development of a deposit.
The founders of Texas ReExcavation, LC, a Houston-based oilfield services company, have acquired GSPE Engineering, Inc.
The environmental regeneration project A Million People: Black Country as an Urban Park, will create a 12-mile 'green bridge' park between West Bromwich and Walsall town centres, as well as helping in the regeneration of Wolverhampton's canal network and the reexcavation and unveiling of forgotten caverns and canal tunnels beneath Dudley.
1 million) worth, which is needed to launch the reexcavation first undertaken 10 years ago.
Tenders are invited for Construction of concrete road from bardabar to chabda of right embankment of topa drainage cut and reexcavation of topa drainage cut at sagarbar g.
A short time later, the company contracted with Houston, TX-based Texas ReExcavation LC (T-Rex) to locate existing subsurface utilities on the project and hydroexcavate the 18,000 feet of trench necessary for the conduit installation.
Tenders are invited for Reexcavation of raghu bundh ,masina within jhalda-i ps
Tenders are invited for Reexcavation of lihir bundh within jhalda-ii ps
Tenders are invited for Reexcavation of jorashal sayer bundh, Ps kashipur
Tenders are invited for Reexcavation of rangamati thakur bundh within para ps