List of top Mining Geology, Mine Development and Surveying Questions

Reciprocal levelling is performed for points P and Q by placing the same levelling instrument at A and B. The observations of staff readings are tabulated as below. 

If the Reduced Level (RL) of P is 115.246 m, then the true RL of Q, in m, is _______ (rounded off to 3 decimal places)
 

In a shovel dumper combination, the loading time of a dumper is 3 minutes. The shovel serves 8 dumpers. If the cycle time of a dumper, including its loading time, is 22 minutes, the waiting time of a dumper, in minutes, is:

Match the source of error with the corresponding correction in surveying with steel tape.


 

A non-transit theodolite does NOT have
Water is pumped from a mine sump at the rate of 300 m3/hr to an inverted conical water tank, as shown. The rate of rise in water level in m/min, at the instant water level reaches at 5 m height from bottom of the tank, is____.(round off up to 2 decimals)
Water is pumped from a mine sump at the rate of 300
In a tacheometry survey, the readings observed are given.
Instrument StationStaff StationBearing of line of sight Vertical angle Staff  readings (m)
pA145°+8°1.2, 1.7, 2.2
 B205°+3°0.8, 1.2, 1.6
The additive and multiplying constants of the instrument are 0 and 100, respectively. The length of the line AB in m, is____.(round off up to 2 decimals)
A scanline survey between points A and B of a rock mass is shown. Consider
RQD =100×(0.12+1)×exp(−0.1λ), 
where, λ is the frequency of discontinuity per m. The RQD of the rock mass is_____. (round off up to 2 decimals) 
A scanline survey between points A and B of a rock mass
A rectangular development heading of dimension 3 m x 2.8 m is to be blasted with holes of 2.4 m in length. If the pull factor is 0.95 and swell factor is 1.20, the volume of blasted rock per round, in m3, is_____.(round off up to 2 decimals)
The percentage Fe and corresponding net value for an iron ore mine is given below
Fe (%) Net value (INR per tonne) 
584000
624500
Assuming net value versus grade curve to be a straight line, and mining cost of waste is INR 1000 /m3; the correct representation of stripping ratio, SR (m3/tonne) versus Fe (%) grade curve is
A rectangular mine airway of 2.0 m width and 2.5 m height has a bend with deflection of π/4 radian. If the radius of curvature of the bend is 4.0 m, the shock factor of the bend is (round off to three decimals)