The stiffness ratio is defined as the bench height
divided by the burden of a blast.
The problem was that while they understood the spacing was also extremely important, methods to determine the spacing did not readily exist due to the variations of spacing with bench height
. Powder factor design was then used to fill the gap by setting an arbitrary powder factor, and after designing the burden, stemming, and subdril, the spacing would be adjusted to match this arbitrary powder factor.
As the bench height
increased, and the spacing was held constant, the powder factor would increase along with the bench height
Bench step activity: effects of bench height
and hand weight.
The investigators choose the bench height
of 41.3 cm for convenience.
There are no such bench height
requirements and the HSE will definitely not be sending their inspectors around measuring the benches!
for mining is planned at three metres which allows for appropriate controls of dilution at ore boundaries.
This new model, with tilting conveyor support beam, makes cleaning easy as the operator can access, remove and clean most of the components at bench height
. In addition, it means that the conveyor can negotiate areas of low headroom when being moved.
But even some adults need to modify bench height
to ensure their wrists and arms can be held level.
Primarily there are blasts with the bench height
as high as tens of meters with the volume of the rock (substances) disintegrated, in order of thousands of tons.
Several studies have shown that exercise intensity during aerobic step dance can be modified by varying stepping rate, bench height
, or manipulating body mass by using hand held weights or adding loads to the torso.
It's 27" high, which is a good bench height
, and it has a top platform that is 9"x9" and can hold a variety of clamped goodies.