Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

Table 2

Parameters of the blast hole plug.

Structure name	OD (mm)	L (mm)	deg. (°)	T (mm)	(kg/m^3)	Q (g)
Impact plug	36	38	6	4.0	918	30
Bursting cylinder	40	57	6	1–3.5	918	10 × 3
Wedge plug	40	100	14	1–3.0	918	40
Water stemming	22	200	—	0.5	1128	40
Plug	40	280	6/14	1–4.0	918	140

OD, outside diameter; deg., inner cone angle; T, thickness.