Abstract: In view of the problems such as relatively poor adaptability,poor dynamic adaptability,insufficient support safety and others of downhole hydraulic supports and surrounding rocks in Yanzishan Coal Mine of Jinneng Holdings,an analysis is conducted on the structural composition and control requirements of hydraulic supports.A dynamic adaptive control technology for hydraulic supports and surrounding rocks based on variable domain fuzzy control theory is proposed,which adapts and matches the surrounding rock parameters with the strength and stiffness of the support roof of hydraulic supports,greatly improving the safety and stability of downhole surrounding rock support in coal mines.Hardware and installation tests are conducted on the downhole ZY9200/25/50D double column four bar linkage shield type hydraulic support in Yanzishan Coal Mine of Jinneng Holdings.The debugging results show that the surrounding rock dynamic control technology can accurately obtain the status information of the hydraulic support,and can automatically adjust the roof pressure and balance the jack pressure of the hydraulic support according to changes in the external surrounding rock properties.The set pressure error value is only 2.87%,which achieves satisfactory application effects and verifies the advantages of the surrounding rock adaptive control technology,ensuring the safety and reliability of downhole working faces in coal mines.