Study on the Strata Movement Rule of the Ultrathick and Weak Cementation Overburden in Deep Mining by Similar Material Simulation: A Case Study in China

Table 1

Surface subsidence coefficient of some coal mines in Dongsheng coalfield.

Working face	Mining width (m)	Advancing width (m)	Mining height (m)	Mining depth (m)	Loose (m)	Bedrock ply (m)	q
Daliuta 12205	230	2251	3.50	110	22	88	0.73
Liuta 12106	246.8	633	6.90	151	30	120.6	0.77
Fengjiata 1201	250	1850	3.30	147	10	137	0.75
Cuncaota 22111	224	2085	2.80	249	8	240.9	0.68
Buertai 22103-1	360	4250	2.90	292	19	273	0.64
2-Cuncaota 22111	300	3648	2.90	305	15	294	0.68
Xiaojihan 11203	240	2245	2.67	350	25	315	0.60
Bayan Gaole 311101∼311103	810	2600	5.30	650	118	532	0.44
Nalinhe-2 31101	240	3030	5.50	650	78	572	0.16
Yingpanhao 2201	300	1800	6.00	725	45	680	0.08