blast hole


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blast hole

A hole drilled into rock in which an explosive charge is to be placed.
References in periodicals archive ?
The process of ejection of stemming material from a blast hole is strongly dependent on the length of stemming material.
High-pressure gas is ejected from the gas ports at specific directions and angles in the gas release tube and acts on the coal body around the blast hole. The direction and diameter of the gas ports are designed to control the gas flow direction and concentrate the energy according to common engineering practices.
Due to the fact that the blast holes studied in this paper are small in size and large in amount, it is inconvenient to build the blast hole model through the method of explosion load exertion in three-dimensional model.
The deals will allow the buyer to tap the rotary blast hole drilling industry and enter target markets in eastern Australia and southern Africa.
When Guido acquired this proprietary technology, it was originally designed for drilling blast holes in open pit mining.
The Swedish industrial productivity solutions provider Atlas Copco said on Thursday (16 March) that it has won an order for 11 blast hole drill rigs from Brazilian mining company Companhia Vale do Rio Doce (CVRD).
The man said he later dug up a shell measuring 1 cm in diameter and 6 cm long from the blast hole. The shell was buried about 25 cm deep, he said.
According to Mitsui Mining officials, the brick wall collapsed while the workers were digging a blast hole for dynamite.
10 inch single pass blast hole drill along with initial spares for 2 years / 4000 hours for nmdc limited, bacheli complex
"The initial trials of which have seen our clients reduce their average blast hole deviation by up to 60%, which has in turn delivered an estimated reduction in dilution of up to 30%," Beilby said.
As the man-lift operator progressed across the face loading the blast holes, the wedged shock-tube stretched and broke (snapped) causing a pre-detonation of a blast hole.