Research on Roof Load Transfer by Passing Coal Pillar of Working Face in Shallow Buried Closely Multiple-Seam

The dynamic load effect of supports is mainly caused by the movement roof structure and transfer overburden. In view practice issue that phenomenon strong ground pressure easy to happen, when working face lower coal seam passes inclined pillar in shallow buried closely multiple-seam, it will lead supprot damaged. This paper takes mining over-inclined pillars 22410 Bulianta Coal Mine as background, based on research method combining field measurement, physical simulation experiment, numerical calculation, evolution law front abutment (FAP) weighting under analyzed, mechanism stress support revealed. shows concentrated jointly borne wall interburden above support. vertical transmitted from floor acts key blocks seam, which causes effect, such cut-off. periodic breaking stratum leads development height range cracks increasing stepwise. partition characteristics mutual transformation stress, FAP, resistance (WR) passing stage are revealed, divided into three stages four regions. With through pillar, influence area reduced, peak gradually transferred outside pillar. When 5 m away FAP WR reaches maximum values, cutting along line, has a phenomenon. results consistent with measurement results, providing reference for faces similar conditions.