The collapse mainly scatter in K16+400~K18+900、 K27+400~K30+235 and K36+940~K37+850, the mainly rock are soft rock, such as mire rock, Sand quality mire rock etc ,the slope high are from 15 to 20 meters or 35 to 40 meters ,the slope angle is from 60 to 82 degree .
Gravitation collapse of spherical symmetry with non-uniform density
A star with sufficiently large mass will collapse in its senectitude because of gravitation.
Many researchers have tried to describe this collapse process.
When the density function is high in the center and decreasing with the radius, the collapse process will be described, and in this case, the singularity will only come out in the center because of collision.
This paper attempted to numerically analyze the action process based on damage mechanics when a jet created by bubble collapse acted on the bearing surface in the process of cavitation erosion.