Volume-1

Shaft Sinking

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Shaft Shinking

Shaft Sinking

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1. The method of sinking used through any fissured water bearing strata except in running sand is..?

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2. The holes treated with chemicals are called..?

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3. The method of sinking through loose deposits of sand up to 20m is?

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4. Upward drivage of shaft is carried out for a distance up to ...m?

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5. The process of treating holes with chemicals in cementation method is called..?

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6. The safety device is provided in sinking shaft in case of overwind?

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7. The method of sinking through loose deposits of sand up to 60m is?

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8. The method of sinking where there is ground filling problem or considerable inrush of water up to depth of 30m?

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9. The starting point of shaft at the ground surface is called..?

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10. In cementation method the purpose of treating holes with chemicals-silicate of soda and aluminum sulfate is..?

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11. The device used to prevent undue swinging of the bucket in sinking shaft?

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12. A permanent lining where running sand is encountered during sinking is..?

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13. Ventilation by mechanical means is provided in sinking shaft exceeding depth of...m?

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14. In blasting in shaft sinking the number of holes are....times the dia of the shaft in m?

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15. In freezing method of shaft sinking which is used for circulation?

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16. In freezing method of sinking the removal of ice wall after completion of sinking by sending hot brine through holes is known as..?

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17. The quantity of ventilating air (cu.m) shall be provided in sinking shaft if depth exceeds 25m?

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18. The method of sinking through alternate loose and tough strata up to 60m?

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19. The method of sinking in unstable or friable strata with heavy inrush of water?

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