In order to solve a diagonal adjustment control problem which one of the key difficulty problems of the intelligent unmanned mining, a site investigation, mechanics analysis and industrial test combined method was applied and an internal root cause and the external induced cause of the diagonal adjustment control in the coal mining face were obtained. The paper stated the mechanics behavior of the scraper conveyor in the fully-mechanized coal mining face. The paper obtained the upward running, downward sliding of the scraper con-veyor, and the mechanics conditions of no upward running or downward sliding of the scraper conveyor. The paper pointed out the single directional coal mining, reversed pushed scraper conveyor, additional cutting depth, minus cutting depth and the plus cutting depth and minus cutting depth combined control technical principle. The diagonal adjustment control technology of the fully mechanized intelligent coal mining face was provided based on the monitoring and measuring of the real time pushing forward rate. The pushing forward rate of the transportation gateway, pushing forward rate of the air returning gateway and the false-inclined angle were real timely monitored and measured. Meanwhile,an automatic comparison analysis was conducted with the pushing forward rate measuring device installed at the head and tail of the machine in order to conduct the intelligent control of the real time diagonal adjustment in the fully mechanized intelligent coal mining face. The site industrial trial showed that based on the monitoring and measuring of the real time pushing forward rate, a max error of the distance measurement in the over wide zone of the coal mining face was 125.0 mm, the min error was 0 and the average error as 25.9 mm. The error within the scope could meet the site requirements of the diagonal adjustment control technology for the fully-mechanized intelligent coal mining face and could conduct the accurate intelligent diagonal adjustment control.

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