Dear Sri Krishnan,
The advise given by Sri Ykamesh is correct and there is much possibility for the bore well to be blocked
I have personally witnessed two incidents of such, where the bore wells ,even the existing yield was vanished. Apart from this, there is risk also involved, if any unfore Seen araises, at the time of blasting. Can’t say.
Now , I opine your bore well is suffering with wrong placement of outer casing pipe. It might not have properly seated in to the Rock hole.
As stated by you, your bore well is giving muddy, white colour water, right from the beginning. It clearly speaks that the mud in the bore well is sucked by the pump. You have also stated that water yield is good in your bore well.
Now I hope that you better go for repairing your same bore well. Take out the casing pipe , and insert it again in to the groove of the Rock. Then drill/flush the bore well up to 380 ft or more.
Hope you will get rid of gthe problem.
With best wishes, g.p.Rao, farmer