Mining Engineering · all questions

Introduction to Mining Engineering
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403

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Q381

Which of the following is not considered under unsupported class of underground mineral exploitation method?

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Q382

Which one of the following term is not related to opencast mining?

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Q383

What is the rate of stone dust loading per meter of shelf length for light type barriers?

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Q384

Prior to installation of a long wall equipment at face, the face is to be developed by Road headers in

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Q385

Roof fall accidents are caused due to

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Q386

Which of the following belongs to hard rock mining?

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Q387

When the thickness of immediate roof is more than A m then it becomes stronger and behaves like a main roof? A is given by

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Q388

Four benches are being worked by the opencast mining system. Height, width and face angle for each bench are 15 m, 50 m and 70° respectively. The overall slope angle of the benches in degrees is

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Q389

Hydraulic mining of coal is normally applicable to mining seams, which are

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Q390

Rill stoping method is a form of

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Q391

The average vertical stress in a coal pillar of a B & P panel is found to be 8 MPa. The depth of the pillar and the average density of overburden rock are 200 m and 2500 kg/m³ respectively. Assuming pillar stress to be the same in all coal pillars of that panel, the extraction ratio of the panel is

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Q392

The Automatic Contrivance shall prevent the descending cage from being landed at pit bottom at a speed exceeding

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Q393

Which of the following characteristics in blasting gallery method is essential to minimize mixing of waste rocks with coal?

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Q394

In order to get better safety, the optimum gradient of a haul road is

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Q395

The maximum number of coal faces in an underground bord and pillar development district is 13. The number of headings in the district is

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Q396

The method of joining rope is known as

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Q397

A longwall panel with a face height of 3.0 m and face length of 150.0 m is worked in 3 shifts per day employing 40 men per shift. The depth of the web of the shearer cutting coal is 0.5 m. The unit weight of the coal is 1.4 tonne/m³. Two full face cuts are executed per shift. The daily production from the panel in tonne is

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Q398

The number of workmen's inspector in a large u/g coal mine

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Q399

A tension crack of 5 m depth behind a rock slope crest is completely filled with water. What is the horizontal force exerted on a unit slope length by the water in the tension crack.

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Q400

Rack & Pinion is used for

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