Analysis of Energy Accumulation and Dispersion Evolution of a Thick Hard Roof and Dynamic Load Response of the Hydraulic Support in a Large Space Stope

Aiming at the mining disaster of a thick hard roof, based on analysis instability influence this study constructs bearing mechanical model roof by using theory and obtains distribution equation energy accumulation, release equation, dynamic load response hydraulic support in working face, as well characteristics putting forward technical countermeasures for strong pressure control face. This research shows that 1) larger overburden suspension span more serious state accumulation evolution; greater rock thickness elastic modulus flexural stiffness resulting increase limit breaking span, which indirectly aggravates self-energy 2) resistance is composed caused accumulated work done overlying load, static direct gravity; 3) accounts highest proportion, followed roof; cause lie large suspended large-scale structure leads to high energy; 4) support; adopting pre-splitting cutting technology reduce reducing impact can effectively eliminate potential safety hazard overlimit support.