By taking the pipeline network of northeast China as an example,this paper summarizes and analyses the evolutional process of the protective form for the oil & gas pipeline at the cross-river section with the lapse of time.

The application of melamine phosphate as filler in the insulating layer on a rocket propellant charge, mechanism of its action, its protection mode against fire, its compatibility with the insulating layer matrix and its other advantages were introduced.

The application of complex support form in reinforcement design of side slope;

Research on the suitable support form of deep gob-side entry in fully mechanized top coal caving mining

Through understanding the properties,deformation and destroying mechanisation of soft rocks,analyzing the stress characters of depth portion mining,comparing with the nowadays support forms,The difference of technclcgy and economicy that use different support forms is obtained by analyzing the existing conditions of every coal seam.