Ice bodies on glaciers and ice slopes are prone to various types of cracks due to their own movement, gravity, and pressure, as well as the unevenness of the river bed and slope. The depth of the cracks is related to the thickness of the ice layer, which is generally more than ten meters, some deeper than one hundred meters. The exposed cracks are called cracks, and some of the cracks are covered by floating snow, called dark cracks. The bright and dark cracks threaten people very much. The identification and passing methods of cracks are usually:

1. Observe the direction of cracks on glaciers and ice slopes.

2, to avoid or less to act on the glacier side.

3, when passing through the crack zone, it is necessary to form a group action. The distance between groups of people should be increased, and the distance between groups should be further.

4. Cracks can be crossed, but mutual protection should be done when crossing.

5. Explosive cracks more than one meter wide, usually borrowed from hard metal ladders, or bypassed.

The identification and passage of dark cracks on glaciers or on ice slopes:

1. The snow on the surface of the dark cracks after the new snow turns brown.

2. The snow covered by the cracks is clearly sinking; when passing through the dark cracks, the snow covered on the cracks is first removed, clear cracks are revealed, and then mutual protection is passed.