Which type of device is recommended for good core recovery from soft rock?
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Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
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All stone dust barriers shall be examined in . . . . . . . .
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The depth of the deepest shaft in coal mine in India.
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The Nationalization of coaking coal mines was done in . . . . . . . .
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The chemicals used in self rescuer is same as . . . . . . . .
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The law related to water gauge, fan speed or quantity is . . . . . . . .
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A mine is not considered to be adequately ventilated if the fire damp percentage in General body of the return air exceeds . . . . . . . .
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The maximum width of roadway permitted by law.
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As per mining engineers rule, minimum radius of shaft pillar for shallow shaft.
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No part of highwall slope of reclaimed overburden should not exceed angle is
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If the velocity of air in a settling chamber is 0.3 m/s terminal velocity of the particle is 0.19 m/s then find out h/l ratio of chamber assuming eddy factor 0.5.
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Use of alternative to explosives may prevent raising of dust.
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Which drivage is cheaper and quicker.
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Air velocities in smooth lined roads . . . . . . . . m/sec.
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Which of the following statements is correct when presence of inflammable gas is detected in any place in a ventilating district?
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In Jharia, fire near Londna and Fire area was prevented from spreading further by installing the fire area by
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Where a shaft accommodates a pair of single cages, the diameter may be nearly.
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Coal mines are said to be very steep; if the inclination is . . . . . . . .
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An underground roadway through stone connecting two or more coal seams.
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Drivage of roadway in coal in a mine, and their network reaches a predetermined boundary called a . . . . . . . .
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