The roadside roof cutting interrupts the continuity between the roadway and the lower roof

promoting the collapse of the lower roof to form a gravel gang. It is of great significance to study the influence mechanism of roof cutting on the caving characteristics of lower stope strata. In this paper

the stope support load was analyzed

the mechanical modeling of the overlying strata was carried out

and the relationship between the movement of the overlying strata and the stope support load characteristics at typical positions was clarified. On this basis

the load data of supports at typical positions were given for six working faces with roadway side roof cutting

so as to analyze the influence mechanism of the roadside roof cutting on the collapse characteristics of the lower strata in the stope. Meanwhile

a numerical model was established

taking into account the different starting positions of roof cutting and the strength of the lower roof

and further analyzed the effect of roadside roof cutting on the collapse of the lower strata. The results show that the "caving line" of the 121 method has a symmetrical arc boundary

the "caving line" of the 110 method is entirely moved to the working face on the roof cutting side

and the N00 method is between the above two. In addition

there are differences in the effect of roof cutting under different roof cutting starting positions and roof strength conditions. The research results are conducive to further deepening the understanding of the effect of roadside roof cutting on the caving characteristics of the lower stope strata.