Risk Assessment of Water Inrush from Coal Floor Based on Karst Fractal-Vulnerability Index Method

Table 1

Calculation results of the karst fractal dimension of grid i in the research area of the Honglin Coal Mine.

No.		No.		No.		No.		No.
i8	0.3170	i30	1.8311	i54	1.9486	i73	0.4170	i90	1.4195
i9	1.6984	i34	0.7585	i55	1.9224	i74	1.7696	i91	1.6618
i10	1.6087	i38	1.5590	i56	1.5066	i75	1.8930	i92	1.8915
i17	1.2510	i39	1.5853	i58	1.6030	i76	1.9874	i93	1.8616
i18	1.6901	i41	1.6481	i59	1.5567	i77	1.6595	i94	1.9791
i20	1.2634	i42	1.6962	i62	1.6723	i78	0.8644	i95	1.8738
i21	1.9802	i43	1.3726	i63	1.3370	i79	1.9473	i96	1.4485
i22	1.7872	i44	1.3229	i64	1.3196	i80	2.0000	i102	0.2000
i25	0.9400	i46	0.7615	i66	1.6163	i81	1.7585	i107	1.1170
i26	1.8987	i50	1.2925	i67	1.8799	i82	0.9814	i108	1.4451
i27	1.2634	i51	1.8325	i68	1.6601	i88	1.0136
i29	1.7567	i53	0.5000	i69	0.8229	i89	1.8585