Research of hydraulic powered supports for entries’ advanced support in fully-mechanized working face of rock burst mine

In view of the serious problems concerning roof fall and rock burst caused by the increase of stress concentration and poor support ability, methods consisted of theory, comparison and classification is adopted to study the ground pressure characteristics and the difference of mining pressure between working face and its entries, to analyze the influence of support on the entries’ stability and the support matching of working face and its entries, and to research the design method of hydraulic support in entries. The results show that:① Due to the increase of mining depth, mining space and mining intensity, the ground pressure of stope increases. Compared with the working face, there is higher stress concentration degree, larger mining influence area, more serious surrounding rock damage and higher support requirements in entries; ②The development of roadway support technology and equipment lags behind the working face seriously, and the support mismatch between the working face and its entries is aggravated because of its low support strength, poor roofing effect and poor stability; ③ Support strength has a major impact on the stability of entries and hydraulic powered supports with higher initial support force and greater stiffness should be applied to strengthen the support; ④The roadway advanced hydraulic powered supports are classified systematically, the characteristics, advantages and disadvantages and applicable conditions of hydraulic powered supports are summarized, and the design method of advanced hydraulic support for enties is proposed.