Characteristics of Stress Transfer and Progressive Fracture in Overlying Strata due to Mining-Induced Disturbances

Table 1

Material parameters of the numerical model.

Group	Density, (kg/m^3)	Elastic modulus, (10^9 Pa)	Poisson's ratio,	Unconfined compressive strength (MPa)	Cohesion, (MPa)	Internal friction angle, (°)
Group 1	2300	80	0.25	135	5.56	35.1
Group 2	2700	70	0.20	121	3.65	31.7
Group 3	1700	9	0.28	30	4.75	32.4
Group 4	2500	40	0.22	125	2.58	29.6
Group 5	1650	8	0.26	25	4.25	32.0
Group 6	1655	7	0.27	36	4.35	33.0
Group 7	1690	9	0.26	38	4.40	32.1
Group 8	1585	8	0.25	25	4.40	33.0
Group 9	1620	7	0.28	37	4.25	32.5
Group 10	1685	9	0.27	29	4.35	32.6
Group 11	1625	8	0.28	28	4.30	32.8
Group 12	1610	7	0.26	32	4.55	32.5
Group 13	1685	9	0.25	30	4.65	32.6
Group 14	1600	9	0.26	31	4.50	32.8
Group 15	1610	8	0.27	28	4.60	32.4
Group 16	1615	8	0.27	27	4.50	32.5
Group 17	1620	7	0.26	30	4.60	32.7