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 ?
Such extraordinary cost projections result from the favorable ore characteristics of the gold-bearing conglomerate that allow for extremely inexpensive, high-volume block caving mining techniques, and the cost-effective use of conveyors for ore delivery and waste impoundment.
The Company believes that this increased capacity, coupled with averaging in ore from the higher grade pay streaks through its block caving operation, will result in a substantial increase in revenue toward the end of the fourth quarter of 2002.
In the mean time, mining is taking place from the developed draw points by block caving and from the undercut level by front caving.
We expect to recover an even higher grade of gold from the underground ore once the conveyors are in place because they will allow us to fully take advantage of our underground block caving method.
Our gold deposit on our 74,000-acre landholding in the Tipuani Gold Mining District, as well as our projected 11,000 ton-per-day Chaco block caving operation, continue to be our main focus.
The first two holes in this year's program also encountered a copper zone higher up in the section which could convert waste to ore in Mitchell open pit scenarios which are planned to precede underground block caving.
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.
Since retiring he has been involved in block caving projects for BHP Billiton, Anglo American and Rio Tinto.
Selection of preferred mining methods tended towards non-entry methods such as block caving and sublevel caving, allowing high levels of automation, control and monitoring, thereby minimising the number of people required to work in potentially hazardous conditions.
Pierce is being awarded with the bronze medal and cash prize for an outstanding doctoral thesis titled "A Model for Gravity Flow of Fragmented Rock in Block Caving Mines".
The Deep Kerr opportunity is enhanced by its accessibility from the Sulphurets valley floor by way of an inclined tunnel, raising the potential for a lower cost block caving option which would also have significant environmental benefits.
underground mining techniques including block caving techniques will provide