Sir,  We are installing a tubewell 400 ft. deep of 12" dia. The land is situated in a river basin  of Hoshiarpur distt. in Punjab. As the formation contains boulders upto 100 ft deep, the reverse machine which  employed to dig the bore is not working. Every time water is consumed at a very high rate, stones start are falling into the bore dug by the machine, making it very a difficult situation to manage.

Please advice on how to complete the borewell.

Thanks,

Joshi,
poonamjoshi1987@hotmail.com