Powder factor using burden
This function will calculate and display the powder of the current ring. When performing this calculation the volume and mass of the ring are calculated and displayed. The mass of explosive is determined from the lengths of holes that have been changed. The calculation of volume and mass of rock is achieved by using the area of the stope outline and an entered burden value.
To run this function: Choose Design > Ring design > Reports > Powder factor using burden, or...
Select the centre stope outline
Select the stope outline of interest in the current ring to display the ENTER RING BURDEN form.
Burden
The burden of the current ring.
The volume of rock for which the current ring is 'responsible' is calculated as the Stope Area * the Specified Burden.
Complete the ENTER RING BURDEN form and choose Apply to display the POWDER FACTOR CALCULATIONS form.
Rock volume
The volume of rock for which the current ring charge must account.
Explosive mass
The mass of explosive in holes drilled into the current stope. Holes belonging to a ring other than the current ring are not included in this calculation.
Powder factor
Explosive mass / Rock volume.
Specific gravity
A nominal specific gravity of the rock to calculate the ring mass.
Rock mass
The mass of the rock in the ring.
The Reset button cancels any editing of the fields on the form, resetting the field values to their initial state.
Explosive mass for hole aaa: bbb (kg)
The calculated explosive mass for hole aaa is bbb kg.
If there is more than one charge segment in the hole, the masses of the individual charges are reported, followed by a total for the hole. For example:
Explosive mass for hole 1: 1 = 44.577, 2 = 78.591, 3 = 78.591, 4 = 14.468, total = 216.227
After the individual holes are reported, a total for the ring is given:
Explosive mass for ring:ccc(kg)
The calculated explosive mass for the ring is ccc kg. This is the sum of the masses reported for individual holes.
The Save 3dm button may be used to create and save a trisolation of the selected stope outline by expanding the stope outline half the burden distance either side of the section plane to create a closed triosolation. This trisolation may prove useful to obtain grade reports from the block model.