Analysis of Crustal Stress and Its Influence on the Stability of the Deep Tunnel in the Huanaote Mining Area

Table 1

Position of each measuring point of ground stress and parameters of test holes.

	Location	Coordinate (x, y, z)	Hole depth (m)	Orientation (°)	Dip angle (°)	Burial depth (m)	RQD (%)
1#	350 m level	(557356.94, 5098624.77, 352.3)	9.1	84	3.5	526	42
2#	350 m level	(556825.46, 5099062.66, 352.3)	6.3	180	4	526	92.3
3#	300 m level	(557315.27, 5098571.06, 301.3)	6.2	305	3	576	52.7
4#	300 m level	(556630.72, 5099129.99, 301.3)	7.0	215	4.3	576	98.9
5#	250 m level	(557255.03, 5098459.76, 252.1)	8	180	4	626	78.4
6#	100 m level	(557367.82, 5098517.70, 102.3)	6	25	4	776	97.5
7#	80 m level	(557171.35, 5098497.59, 81.8)	6.1	172	4.5	796	98