Research on a Numerical Simulation and Prediction Model of Floor Mining Failure Depth in the Chenghe Mining Area

Table 5

Comparison between the values measured in situ and the fitted values of the floor failure depths.

Serial number	In situ value of floor failure depth (m)	Formula (1)		Formula (2)		Formula (3)		Formula (4)		Formula (5)
		Absolute error (m)	Relative error (%)	Absolute error (m)	Relative error (%)	Absolute error (m)	Absolute error (m)	Relative error (%)	Absolute error (m)	Relative error (%)	Absolute error (m)
1	13.0	2.90	22.33	3.02	23.23	0.65	4.99	0.96	7.36	2.43	18.66
2	9.50	1.76	18.57	1.54	16.23	5.23	55.03	5.38	56.63	2.64	27.76
3	6.50	0.54	8.37	0.52	8.06	0.94	14.52	0.13	2.03	2.58	39.63
4	9.70	1.27	13.14	1.38	14.27	1.45	14.91	0.63	6.51	3.28	33.78
5	11.7	0.47	4.00	0.58	4.93	1.95	16.66	2.26	19.29	0.30	2.53
6	10.5	2.31	21.98	2.08	19.86	7.46	71.09	7.07	67.32	5.05	48.13
7	9.70	2.88	29.71	2.75	28.33	2.53	26.03	1.68	17.36	4.85	50.02
8	11.7	1.69	14.44	1.56	13.30	0.21	1.79	0.36	3.10	2.54	21.68
9	8.50	0.11	1.26	0.07	0.80	2.99	35.18	3.56	41.91	0.34	3.99
10	9.75	0.79	8.09	0.64	6.55	4.98	51.05	5.13	52.61	1.87	19.20
11	10.0	0.22	2.23	0.38	3.81	1.49	14.91	2.06	20.63	0.99	9.95
12	8.00	3.80	47.45	3.49	43.65	3.63	45.38	2.91	36.39	5.26	65.79
13	6.00	1.80	29.93	1.78	29.60	1.63	27.18	0.91	15.18	3.26	54.39
14	3.50	2.10	60.06	2.12	60.65	0.44	12.51	1.10	31.54	2.66	75.90
15	11.35	0.06	0.53	0.07	0.58	2.84	25.06	3.07	27.10	0.53	4.65
16	13.87	1.75	12.61	1.87	13.52	3.01	21.72	2.81	20.27	0.37	2.70
17	8.30	0.55	6.58	0.53	6.34	1.13	13.56	0.28	3.42	2.78	33.47
18	10.75	0.27	2.56	0.30	2.82	2.25	20.90	2.64	24.57	0.34	3.16