The Study on Large-Diameter Drilling Prevention Method of Rock Burst in the Xinxing Coal

Table 4

Summary table of ground stress measurement.

Borehole position	Depth/m	Measuring point	Main stress				Vertical stress/Mpa
			Stress	Value/MPa	Azimuth/°	Inclination/°
-600 West Sixth District Main Transport Alley	807.4	1#		28.54	172	1.65	20.19
				14.19	84	-37.39
				13.93	260	-52.56
-600 three-level substation in the fifth mining area	780	2#		26.81	154	7.67	19.5
				13.56	44	68.19
				12.32	247	20.29
		3#		27.09	160	1.70	19.5
				13.51	72	-39.49
				13.30	248	-50.47