. 2020 Dec 22;6(1):448–455. doi: 10.1021/acsomega.0c04881

Table 3. Physical Quantity and its Dimension Expression Affecting the Diffusion of Blasting Dust.

physical quantity	symbol	dimension expression
dust diffusion time	T_diffusion	T
surface wind speeds	v	L·T^–1
pit bottom wind speed	v_B	L·T^–1
gravity acceleration	g	L·T^–2
angle between the wind direction and the long axis	α	no dimension
leeward slope angle	β	no dimension
depth of the pit	H	L
length of the long axis of the closed circle	L₁	L
closed circle pit depth characteristic length		L
pit bottom characteristic length		L