Study on stability technology of hydraulic support in fully-mechanized caving working face with large dip angle;

Light type caving coal hydraulic support structural characteristic and discussion on canopy structural design;

The research of appropriate original supporting pressure of powered support;

Dynamic analysis of caving powered support stability in deeply inclined coal seam;

Study on powered support canopy motion track of joints with clearance;

The structure patterns and performance analysis of the double-telescopic props of hydraulic supports;

Computer aided concept design system for hydraulic supports;

The structure characteristics and principle of the new type relief valve used on hydraulic supports were introduced.