The problems existed in scraper conveyor of SGZ-764/400 type in 21121 working face of Qianqiu coal mine,some technical reform measures are put forward and also the result after reform is introduced.

This paper expounds the reseach course of the scraper conveyor's tight chain device,and describes the safety and feasibility of it at the angle of mechanics.

The importance on material selection of sprocket wheel of heavy and heavier scraper conveyor are showed.

Analysis and prevention of scraper used in coal mine breaking chain;

technology holder design and manufacturing method scraper used in coal mine of round chain whool milling tooth were introduced.

Dynamic modeling and simulation of heavy scraper conveyor;

Reason analysis and prevention about chain breakage trouble of scraper conveyor;

The improvement and coupling of the SSJ650 type belt conveyor and 40T type scraper conveyor;

Dynamic analysis of round-link chain for scraper conveyer under chain blocked;

On the application of the hydraulic equipments in scraper conveyer;

Optimization for scraper spacing of scraper conveyer;

Parametrization and Visualization Design to Driven Sprocket of Armoued Face Conveyor(AFC) Used in Coal Mine;

Research on auto control system of chain tension for AFC;

The application of hydraulic motor tension chain system of AFC;