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;

Introduces a coal mine hydraulic support repairing actuality and a type of special disassembly machine using to disassembl hydraulic support,discuss its composing structure,work principle,hydraulic system,suit work conditions,main specialty,point out this machine to solution technice problem,and using this machine for attainability purpose.

0 to detect the airtight quality and manage data for hydraulic support test-bed,implemented setting work modes of hydraulic support test bed at will;The support number and cylinder diameter is set according to the demand of coal mine;realized two detecting ways(automatic and manual),all parameter settings are automatically saved,and the tested-data are managed and maintained.

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.

Study on the Structure of the Cartridge valve with on Operating system of the Hydraulic supporter Support-post;

Study on the feasibility of the hydraulic supporter with water medium;

A kind of new style combination linear hydraulic supporter is offered,which possesses the characteristic of light weight,reasonable structure, excellent mobility and low investment ect.