block caving

block caving

[′bläk ‚kāv·iŋ]
(mining engineering)
A method of caving where a block, 150-250 feet (46-77 meters) on a side and several hundred feet high, is induced to cave in after it is undercut; the broken ore is drawn off at a bell-shaped draw point.
References in periodicals archive ?
Significant upside opportunity - Newcrest believes it will be able to unlock significant value from the deposit by applying its unique technical expertise in block caving, operations optimisation and selective processing.
"It makes more sense to do sub-level caving method rather than block caving for Silangan," Austin said.
This Indonesian operation is expected to deliver less than half the amount of copper it produced in 2018, as it transitions from the end of open-pit mining to additional contributions from underground block caving.
As for the local miners, to overcome the production costs mining is mostly done using block caving method.
Block caving is a mining method in which blocks of ore are undercut to induce caving, allowing it to break up and be drawn off, pulled by gravity.
The so-called induced caving mining method is a newly improved underground mining method as a combination of the block caving mining method (Figure 2(a)) and the sublevel caving mining method (Figure 2(b)) essentially.
MacLean, a former Inco employee who worked in Sudbury, developed drawpoint obstruction clearance machines for block caving rigs, including blockhole jumbos in the late 1970s.
Famorca, 81, said the tailings dam serves Philex's original block caving operations at the Padcal mine in Itogon, Benguet.
Since retiring he has been involved in block caving projects for BHP Billiton, Anglo American and Rio Tinto.
A component of our next drilling program will be to further expand the higher grade core while also expanding the larger system which is believed to be amenable to the low-cost block caving mining method.'
Researchers will work on sensing technology for use in block caving to measure the underground area containing minerals and the size and shape of these deposits.