Model of Overlying Strata Structure in Large Mining Height Excavating Condition and Calculation of Support Working Resistance

Aiming at the wide range of rock strata movement and collapse, poor stability high damage rate working face support being prone to crushing in large mining height face, analog simulation, theoretical analysis, field measurements have been carried out analyze roof breaking structure form calculation method reasonable resistance face. The researches show that, affected by space mined-out area, will take on structural “combined suspended beam-nonhinged roof-hinged roof”; interaction system between surrounding consists “hinged structure,” “nonhingeable suspension beam support. should adapt change overlying structure’s instability movement, bearing weight itself additional load generated movement. Combining with conditions Jinhuagong Coal Mine’s Datong is analyzed. mine pressure monitoring shows that ZZ13000/28/60 type shield hydraulic can meet requirements control; research results ensure safe