In this paper, the evolution characteristics of overburden caving and void
during multi-horizontal sectional mining in steeply inclined coal seams are
studied. Based on the typical engineering background of steeply inclined
coal seams mining in Wudong Coal Mine, the physical simulation model is
build. The evolution characteristics of overburden caving and void during
multi-horizontal sectional mining is systematically studied, combined with
the monitoring data of overburden infrared thermal image, void ratio, void
network fractal dimension, and peak mine pressure. It is showed that,
during multi-horizontal sectional mining in steeply inclined coal seams, the
movement rule of overburden is extremely complicated, and the temperature
changes in infrared thermal image were significant.