Intelligent optimization for support pressure zone algorithm based on fuzzy neural network damage identification

EURASIP Journal on Wireless Communications and Networking

Table 1 Physical mechanical parameter statistics tables of coal rock

Rock strata	Density ρ (kg/m³)	Modulus of elasticity E (GPa)	Poisson’s ratio ν	Cohesion C (Mpa)	Friction angle Φ (°)
Coarse sandstone	2600	16.5	0.206	4.5	34
Siltstone	2460	19.5	0.2	2.75	38
Medium sandstone	2650	18	0.21	3.5	35
Mudstone	2461	17.7	0.204	1.2	32
Coal	1380	5.3	0.32	1.25	32
Fine sandstone	2873	28.3	0.235	3.2	42