Figure 12
The overlying strata movement in the late stage of No. 42 upper coal seam mining. (a) No. 42 upper coal seam working face advancement by180 m; and (b) No. 42 upper coal seam working face advancement by 270 m.
Figure 12 | Scientific Reports
The overlying strata movement in the late stage of No. 42 upper coal seam mining. (a) No. 42 upper coal seam working face advancement by180 m; and (b) No. 42 upper coal seam working face advancement by 270 m.
