Mining Engineering · all questions

Introduction to Mining Engineering
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Q281

The area of working face broken per drill hole is termed as

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Q282

The natural and geological conditions of the mineral deposit are as follows
1. ore strength : weak to moderate
2. rock strength : moderate to strong
3. deposit shape : tabular
4. dip : flat
5. depth : shallow to moderate
6. cost of mining : moderate
From the options listed below select the optimal or best suited method possible for the available conditions?

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Q283

Which of the following is in vogue to calculating depreciation?

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Q284

Gestation period is

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Q285

As per Indian Electricity Rules, where hand-held portable apparatus is used, the voltage should not exceed

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Q286

Extraction to a small sized, irregular and unsystematic underground working is called

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Q287

Chances of Over-riding of gallery is most with

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Q288

Which of the following type of SDB is placed outbye of the face?

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Q289

If the value of ore is Rs. 600 per tonne, production cost Rs. 400 per tonne, and cost of overburden removal Rs. 50 per m³, the break-even stripping ratio in m³/tonne is

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Q290

Given bench height: 12 m, burden: 4 m, Spacing: 5 m; explosive per hole: 120 kg; density of rock: 2600 kg/m³, the powder factor in tonne/kg is

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Q291

In hydraulic mining the coal pulp is carried by

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Q292

In a drift of 2.4 m × 3.0 m size, the pull obtained per blast is 1.8 m. the total explosives consumed per blast is 36 kg. If the tonnage factor is 0.36 m³/te, the powder factor is

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Q293

Which of the following statement is true for long wall mining?

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Q294

Total number of injuries in an opencast coal mine employing 800 persons is 16 in a year. As per DGMS norms, the injury rate per 1000 persons employed is

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Q295

First generation powered support is

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Q296

Who out of the following is duly appointed in writing by the Manager as competent person to supervise the operation, plant or equipment?

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Q297

As per MMR 1961, mine plan of a mine having large opencast working shall be on a scale having a representative factor of

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Q298

Match the following:

Mining system	Face supports
a. Mechanized longwall in flat seam	1. Cable bolting
b. Blasting gallery method	2. Shield support
c. Mechanized longwall in steep seam	3. Alpine breaker line support
d. Wangawilli method for 3 m thick coalseam	4. Troika shield support

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Q299

Which of the following excavator will be used for a bench height of 20 m to 30 m in soft rock formation?

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Q300

Resuing stoping method is adopted when ore body is

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