mechanic resistance, specific gravity and conductor section of a conductor be affected, if a few meters of it was crushed under a bulldozer?
You aren't giving enough information... If you are talking about AC power conductors, I wouldn't expect any problems. If you are talking about cable TV and internet, you might end up with a bad signal.
A first look I would interpret it as is: the conductor and its insulation have been converted from perfectly round to a flattened oval. But, it is also stretched in the length direction and that is where the problem arises. Since the wire would have been stretched the cross-sectional surface area is smaller. Due to the uneven pressure , the distortion will be greatest at the edges of the bulldozer tract. In this area the resistance will be greatest, the heat generated would be concentrated at these two areas. Since the remainder is flattened (some) the self induction would be greater along the more flat portion. All this assumes insulator integrity remains.
