Risk Assessment of Water and Sand Inrush in Mining under Thick Loose Layer Based on Comprehensive Weight-Cloud Model

Table 4

Numerical characteristics of each index belonging to each risk grade.

Index	Numerical characteristics
	I	II	III
	(7.5, 6.369, 0.5)	(22.5, 6.369, 0.5)	(37.5, 6.369, 0.5)
	(0.5, 0.425, 0.05)	(2, 0.849, 0.05)	(9.5, 5.520, 0.05)
	(12.5, 2.123, 0.2)	(7.5, 2.123, 0.2)	(2.5, 2.123, 0.2)
	(1.75, 1.486, 0.1)	(5.75, 1.911, 0.1)	(10, 1.699, 0.1)
	(90, 8.493, 1)	(70, 8.493, 1)	(30, 25.478, 1)
	(0.2, 0.170, 0.001)	(0.5, 0.085, 0.001)	(0.8, 0.170, 0.001)
	(108, 57.325, 1)	(30, 8.493, 1)	(10, 8.493, 1)