Research and Application of Prefilled Concrete Wall to Reduce the Size of Stopping Mining Coal Pillar

Table 2

Mechanical parameters of stopping mining coal pillar.

Symbol of the parameter		/m	/m		/m	/°	β/°	σj/MPa	γ/kN·m^-3	γ/kN·m^-3	/m
The value of the parameter	0.75	160	5	2.9	15	83	60	8	25	25	10~30