Researches on the Influence of Blasting of Newly Built Tunnel on the Existing Tunnel Structure with Small Cross Angle

Table 4

The arrangement of testing conditions.

No.	Maximum charge per delay Q (kg)	Surrounding rock	Clear distance D (m)	Cross angle α (°)	Blasting methods
1	26.50	III	16.90	30°	Full-section method
2	13.14	III	16.90	30°	Bench method
3	13.14	IV	16.90	30°	Bench method
4	13.14	III	16.90	15°	Bench method
5	13.14	III	16.90	45°	Bench method
6	13.14	III	8.45	30°	Bench method
7	13.14	III	25.35	30°	Bench method