Gao et al discuss on top coal caving is one of the most effective methods for mining thick coal seams. The lop coal caving process leads to large-scale motion in the coal rock layer. Under the coupled influence of mining dynamics and gas pressure in the coal body, the mining-induced fracture field and primitive fracture field are superposed in the overlying rock layer, and the associated laws of temporal and spatial evolution are extremely complicated. Under the top coal caving conditions, the abutment pressure response lags behind the response of the characteristic values (fractal dimension and connectivity) as the mining-induced fractures evolve, and the average growth rate of the abutment pressure coefficient is higher than the fractal dimension and the one-dimensional connectivity of the fractures by a factor of 10-100.