Research on Gas Exploration Shock Wave Spread Law via One-Way Bifurcation Pipeline

Table 2

Coefficient shunt and attenuation coefficient of the gas and smut explosion shock wave via the one-way bifurcation pipeline.

Shock wave overpressure	Branch bifurcation angle β (°)	Coal dust concentration in the explosion chamber (g/m^3)	Testing point 1 (MPa)	Testing point 2 (MPa)	Testing point 3 (MPa)	Branch pipeline bifurcation coefficient M	Straight pipeline attenuation coefficient K1	Branch pipeline attenuation coefficient K2
Peak overpressure	30	375 (30 g)	0.52	0.37	0.35	0.96	1.41	1.48
		500 (40 g)	0.95	0.75	0.63	0.83	1.26	1.51
		625 (50 g)	1.73	1.39	1.14	0.82	1.24	1.51
	45	375 (30 g)	0.50	0.38	0.34	0.89	1.32	1.49
		500 (40 g)	0.84	0.60	0.51	0.85	1.40	1.65
		625 (50 g)	1.44	0.90	1.02	1.13	1.61	1.42
	60	375 (30 g)	0.54	0.34	0.33	0.97	1.61	1.65
		500 (40 g)	0.88	0.68	0.51	0.76	1.30	1.72
		625 (50 g)	0.96	0.66	0.51	0.76	1.45	1.90
	90	375 (30 g)	0.52	0.47	0.25	0.54	1.09	2.04
		500 (40 g)	0.80	0.79	0.50	0.64	1.01	1.59
		625 (50 g)	1.36	1.06	0.63	0.59	1.28	2.16
	120	375 (30 g)	0.48	0.46	0.23	0.50	1.04	2.08
		500 (40 g)	0.77	0.70	0.36	0.52	1.11	2.12
		625 (50 g)	1.07	0.95	0.47	0.50	1.13	2.27
	135	375 (30 g)	0.53	0.50	0.24	0.48	1.06	2.19
		500 (40 g)	0.86	0.81	0.36	0.45	1.06	2.38
		625 (50 g)	1.13	1.01	0.48	0.47	1.11	2.34
	150	375 (30 g)	0.60	0.56	0.25	0.44	1.07	2.40
		500 (40 g)	0.94	0.88	0.34	0.39	1.07	2.75
		625 (50 g)	1.15	1.08	0.40	0.37	1.07	2.87