Investigation of Strong Strata Behaviors in the Close-Distance Multiseam Coal Pillar Mining

Table 1

Stratified statistical table of microseismic events.

Layers
Energy	14-3# coal seam floor	14-3# coal seam roof	11-2# coal seam roof
1 × 10^4 J∼1 × 10^5 J	60	147	130
1 × 10^5 J∼1 × 10^6 J	2	17	24