Drilling and Blasting Flashcards
Preferred for all methods of forming a directional hole in
rock
rock penetration
method of rock penetration that utilizes mechanical energy to break rocks
mechanical attack
method of rock penetration by disintegration of rock by fluid injection and commonly used for placer deposits
fluid attack
method of rock penetration that penetrates rock by spalling
thermal attack
method of rock penetration that is attractive as an accessory rather than a primary means of penetration
chemical attack
rock penetration method that includes electrical, light, and energy and are experimental
other methods
method of rock penetration that is referred to as vibratory drilling
sonic attack
Involves drilling closely spaced
holes within the deposit to
increase the confidence in
resource estimation. It helps to
determine the distribution and
continuity of mineralization
infill drilling
Utilizes diamond core drilling to
obtain cylindrical core samples of
the rock. Core samples provide
detailed geological information,
including the mineral composition
and structure
core drilling
Involves drilling shallow holes to
identify surface mineralization
and assess the potential of an
area
prospecting drilling
A faster and cost-effective method that
uses compressed air to
collect samples during
drilling
reverse circulation drilling
Assesses the stability and
rock characteristics in
the deposit area. This
information is crucial for
mine design and
planning
geotechnical drilling
energy source of a drilling machine
drill
energy transmitter part of a drill
rod
energy applicator part of a drill
bit
part of drill that controls dust, cools the bit, and cleans the hole
fluid
Impacts the rock like a
hammer-like blow
percussion drilling
Penetrates by plowing action
rotary drag bit drilling
This uses a rotary drill machine
rod and drilling fluids in
conjunction with a swivel-type
double-tube core barrel
conventional drilling system
Form of drill rig is the same as drag-bits, employing the
same forces to achieve penetration
rotary roller bit drilling
Hybrid form of drilling, combining independent
percussive and rotational actions
rotary percussion drilling
This is modified system over conventional drilling where it also uses a swivel-type double-tube core barrel where the inner tube containing the core can be hoisted through the drill rods while the outer tube and rods remain in the hole
wireline drilling system
provides a means of hoisting and
lowering of the necessary tools
derrick
refers to the distance
between the blasthole and
the nearest free face or
excavation boundary
burden
refers to the
distance between individual
blastholes within a blast
pattern
spacing
s the distance
drilled below the floor level to
ensure that the full face of
rock is removed.
sub drill
Also known as blasting initiators, these are small
explosive devices that are attached to
the detonators to initiate the explosion of
the main explosive charge
basting caps
Devices used to
initiate the explosion of explosives.
detonators
A device used to amplify or
enhance the energy of the initiating
charge. These are often used when a
stronger initiation is required to ensure
reliable detonation of the main explosive
charge.
booster
A flexible plastic explosive
cord that combines a core of high-energy explosive material with a
protective outer covering
cordtex
characterized by their rapid and complete
reaction, producing a supersonic shock wave.
high explosives
have a slower
rate of reaction and typically burn rather than
detonate. They are often used as propellants or in
fireworks.
low explosives
