waithiraallan
Answered

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how is shaft method carried out​

Sagot :

mandylazy
The method consists in drilling the holes and then injecting a slurry of water and cement under pressure through the holes till they are completely sealed off. In the past injection was done at low pressures like 6 kgf/cm2 but it has been proved that high pressure of the order of 300 kgf/cm2 can be used successfully
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