Water-cooled bainitic steel used in hydraulic shelves pillar was developed to increase the hardenability of steels and trial production was carried out.

Self - made disnentling and assembling press by using mode RB - 80/350 emulsion pump and the prop of hydraulic support;

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.

Finite element analysis on sealing cover of DWX hydraulic prop;

This equipment retrieves a hydraulic prop by the thrust of hydraulic cylinder.

This paper deals with the finite element model of DWX hydraulic prop in aid of Pro/MECHANICA.