4 Module Level Problems Problem 1 Question: Draw a schematic diagram showing the plan of a surface mine benches developed using shovel and dumper and explain the sequence of developing the benches. Solution: The benches are developed by providing the initial mine cut and then by lateraly expanding the benches. After a bench is developed the deepening of the pit with next box cut is carried out. Figure below shows a schematic of a surface mine plan. Figure: Schematic representation of a pit with excavator-truck system. 1. Shovel, 2. Truck, 3. Dozer, 4. drills, 5. In pit crusher. Initial box cut was given from RL 200 and a 15 m height bench has been developed. The ramps are shown as shaded. The lower most bench being developed is shown at RL125. It is a complecated figure from metal mine a caol figure may be added The students can be asked to show the sump position and identify ideal location for setting up of support infrastructure.
Question: Draw a schematic diagram showing the plan of a surface
mine benches developed using shovel and dumper and explain the
sequence of developing the benches. Solution:
The benches are developed by providing the initial mine cut and
then by lateraly expanding the benches. After a bench is developed
the deepening of the pit with next box cut is carried out.
Figure below shows a schematic of a surface mine plan.
Figure: Schematic representation of a pit with excavator-truck
system. 1. Shovel, 2. Truck, 3. Dozer, 4. drills, 5. In pit
crusher.
Initial box cut was given from RL 200 and a 15 m height bench
has been developed. The ramps are shown as shaded. The lower most
bench being developed is shown at RL125.
It is a complecated figure from metal mine a caol figure may be
added The students can be asked to show the sump position and
identify ideal location for setting up of support
infrastructure.
5 Module's Learning Strategy
To learn the development of box cut the students are encouraged
to make thermocol model and verify the formula derived for
calculation of volume of box cut. Formula derived in the text book
(Surface Mining by G. B. Mishra) can be used for calculation of
volume to be excavated for developing the box cut.
The sequence of operations involved in developing benches in
continuous surface mining can be studied from the case study of
Neyveli mines.
Chapter 1 of the book "Opencast Mining Technology and Integrated
Mechanisation" by V. V. Rzhevsky gives good illustration for
conceptualising the development of benches.
Students are encouraged to draw plan and sections of different
pits.
