How to restore a collapsed borewell

Borewell collapsed due to accumulation of stones


We had a borewell in Hyderabad, whose water yield reduced, i.e., the flow was thin despite sufficient water. We were advised to go for flushing. After flushing, we could not lower the pipes. The person who did the flushing said that small stones had filled in the bore due to pressure of water. Practically, he said the borewell had collapsed.

Is there any way whereby this can be corrected?