The danger area planning of mountain disasters as important passive mitigation measure is one of the powerful tools for efficient mountain disaster manatement.

Based on ANSYS software,this article analyses and computes the seal shell of petroleum casing hydrostatic test unit by finite element method,finds out the dangerous region and the Von Mises Stess 374Mpa from the displacement and stress cloud images,which provides the representative theoretic guidance for seal shell design.

The virtual inspector of this system strengthen the authenticity,and the design of the dangerous region make the system perfect.

Division of flood damage dangerous zone in Jilin province;

Classification of hazardous area and electric equipment used in the area;

The correct prediction of the hazardous area in toxic gas leaking accident can provide a good basis to establish a reasonable and effective emergency response program and to implement an effective emergency site control and handling activities.

Partition of spontaneous combustion dangerous zone and prediction of spontaneous combustion based on numerically modeling the flow field at fully mechanized caving face;