List of top Mine Planning Questions

A solid ball of mass 10 kg is subjected to forces as shown. The magnitude of the acceleration in m/s², is____.(round off up to 2 decimals)

A typical 24-hour activity of a mobile crusher plant is shown. The utilization, in %, of the plant, is (round off up to 2 decimals)

In an open pit mine, the mineral inventory, prices, costs and capacities are given.

Concentrating cost: INR 3,200/tonne of ore milled
Smelting & refinery cost: INR 10,000/tonne of copper metal
Selling price: INR 6,50,000/tonne of copper metal
Overall recovery: 100%
Maximum production capacity: 5 million tonne/annum
The mine is operating at 5 million tonne in a year. Considering mining capacity being the only constraint, Lanes' algorithm (based on profit maximization) is used for determining mill cut-off grade. The total amount of copper produced in million tonne, in the life of the pit, is____.(round off up to 2 decimals)

The data obtained from an air sample analysis of an old working in a coal mine are given.
O2 17.15%, CO2 3.40%, CH4 2.20%, and N2 77.25%. 
Considering atmospheric air contains 
O2 20.95%, CO2 0.03%, and N2 79.02%, 
the percentage of blackdamp in the old working, is____.( round off up to 2 decimals)

Match the method of mining with orebody geometry, orebody strength and type of supports.

Geometry	Strength	Support	Method
P. Tabular & Moderately Steep	L.	X. Unsupported	1. Cut and Fill
Q. Tabular & Flat	M. Moderate	Y. Artificially Supported	2. Block Caving
R. Massive and Steep	N. Weak	Z. -supported	3. Room and Pillar

Four identical districts of a mine are ventilated with a quantity of 3500 m³/min at a fan drift pressure of 1.15 kPa. When one of the districts is sealed off, the change in resultant resistance is 0.072 Ns²m^-8. If the fan is stopped, keeping a district sealed, the quantity through the mine becomes 850 m³/min. The natural ventilation pressure in Pa, is

The combined sound pressure level measured at a point in a production bench due to one dumper and one shovel is 95 dB(A). If the sound pressure level of shovel alone is 90 dB(A), the sound pressure level of the dumper alone, in dB(A), at the same point is_____.(round off up to 2 decimals)

In a VCR stope, blast holes of 165 mm diameter are drilled. For the blast hole to behave as a spherical charge, the maximum charge length, in m, is____.(round off up to 2 decimals)

For a circular path of radius 300 m, the super elevation is restricted to 0.1 m for a width of 1.6 m. The maximum speed, in m/s, of vehicle to avoid overturn is_____.(round off up to 2 decimals)

The function of District Mineral Foundation established by state governments in India, is to

Match the following features with the corresponding symbols

	Feature in mine plan		Symbol
P	shaft	1
Q	staple shaft	2
R	Abandoned shaft	3
S	Abandoned staple shaft	4

The spherical semivariogram model (γ(h)) is represented by the following expression, where h is the lag distance.
\(y(h) =   \begin{cases}  C_0,\\ C_0+(C-C_0)[1.5\frac{h}{a}-0.5(\frac{h}{a})^3], &\\C,  \end{cases}\)
The parameters C_o, C and a are respectively known as