Question:
For a continuous miner (CM) panel, the following data are given.
Data related to CM
Dimension of a working face : 5.0 m (width) x 3.0 m (height)
Web depth m : 0.6
Time for one web cut up to full height, min : 9
Data related to shuttle car
Bucket capacity of shuttle car, tonne : 10
Fill factor : 0.9
Number of cars : 2
Cycle time of each car including loading, travel and unloading, min : 6
Assume, unit weight of coal is 1.4 tonne/m3 and its swell factor is 1.2. Consider, 6 working hours per shift.
The non-working time in min, in working hours per shuttle car to dispatch all coal cut by the CM, is____ (round off up to 2 decimals)
For a continuous miner (CM) panel, the following data are given.
Data related to CM
Dimension of a working face : 5.0 m (width) x 3.0 m (height)
Web depth m : 0.6
Time for one web cut up to full height, min : 9
Data related to shuttle car
Bucket capacity of shuttle car, tonne : 10
Fill factor : 0.9
Number of cars : 2
Cycle time of each car including loading, travel and unloading, min : 6
Assume, unit weight of coal is 1.4 tonne/m3 and its swell factor is 1.2. Consider, 6 working hours per shift.
The non-working time in min, in working hours per shuttle car to dispatch all coal cut by the CM, is____ (round off up to 2 decimals)
Data related to CM
Dimension of a working face : 5.0 m (width) x 3.0 m (height)
Web depth m : 0.6
Time for one web cut up to full height, min : 9
Data related to shuttle car
Bucket capacity of shuttle car, tonne : 10
Fill factor : 0.9
Number of cars : 2
Cycle time of each car including loading, travel and unloading, min : 6
Assume, unit weight of coal is 1.4 tonne/m3 and its swell factor is 1.2. Consider, 6 working hours per shift.
The non-working time in min, in working hours per shuttle car to dispatch all coal cut by the CM, is____ (round off up to 2 decimals)
Updated On: Jul 18, 2024
Hide Solution
Verified By Collegedunia
Correct Answer: 150
Solution and Explanation
The correct answer is: 150.00 or 160.00 (approx)
Was this answer helpful?
0
0
Questions Asked in GATE MN exam
- A Bord and Pillar panel is developed at a depth of 250 m in a flat coal seam. The vertical stress gradient is 0.027 MPa/m. If the strength of a square pillar is 12.5 MPa, the extraction ratio of the pillar for a safety factor of 1.5, is____.(round off up to 2 decimals)
- GATE MN - 2024
- Room and pillar mining
- 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)
- GATE MN - 2024
- Levels and Levelling
- A mine worker weighing (W) 600 N lifts an object of 100 N as shown. The 50% body weight is applied downward through point A and a force FE is produced parallel to x axis by the contraction of erector spinae muscle during lifting. The lumber disc, L (shown by red box) acts as a smooth hinge and keeps the upper body in static equilibrium. Ignore all other forces in the body. The magnitude of the resultant of the reaction forces, in N at the lumber disc, is____.(round off up to 2 decimals)
- GATE MN - 2024
- Mechanization of Surface Mining
- In an opencast coal mine, blast vibrations are measured at two locations, A and B simultaneously for a maximum charge per delay (Q) of 1200 kg as given.\(PPV=K[\frac{D}{\sqrt{Q}}]^{-B}\)
Location Distance from the blast face, D (m) PPV (mm/s) A 100 112.5 B 300 20.3
where, K and ẞ are site constants. The PPV in mm/s, at a distance of 200 m from the blast face, is (round off up to 2 decimals)- GATE MN - 2024
- Ground Vibrations
- 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)
- GATE MN - 2024
- Optimization of Facility Location
View More Questions