Similar Simulation Test on Deformation Characteristics of Overlying Rock Developed by Instability of Strip Coal Pillar

In order to protect surface buildings and maximize the recovery of coal resources, there are a large number strip pillars unfilled goafs left in mining areas China. Affected by comprehensive factors such as long-term overlying rock load, water accumulation goafs, adjacent mining, instability probability pillar increases greatly, which becomes potential hidden danger disaster. However, law movement caused is not clear up now. Therefore, series experimental studies on deformation induced carried out this paper. The results show that it feasible use paraffin-containing materials make model simulate heating paraffin. After subsidence curve L5 monitoring line its upper strata “disk.” pillar, changes from “disk” “basin.” can lead significant more harmful overburden between than working face. because unstable still has certain bearing capacity, maximum far less under condition longwall mining.