Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress

Figure 1

Geological and engineering conditions of the entry. (a) Mining engineering plan; (b) A-A cross section in (a); (c) local drilling histogram. The gob has been in consolidation before the tail entry driving begins. The tail entry with dimensions of 5.0 m in width and 4.0 m in height is arranged along the coal floor and it is going to be excavated after its location is determined.

(a)

(b)

(c)