Application of Gray Markov Model to Prediction of Accidents Deaths in Coal Mining

Table 4

Prediction comparison of deaths from 2004 to 2013.

Year	Actual value	Amended model		Amended Markov model
		Prediction value	Relative error	Prediction value	Relative error
2004	6027	5433	0.099	6112	0.014
2005	5986	5233	0.126	5887	0.017
2006	4746	5040	0.062	4914	0.035
2007	3786	3970	0.049	3870	0.022
2008	2631	3846	0.462	3749	0.425
2009	2631	3725	0.416	2328	0.115
2010	2433	3592	0.476	2424	0.004
2011	1973	3357	0.701	2265	0.147
2012	1384	2142	0.548	1446	0.045
2013	1067	1934	0.813	1305	0.223