The stone blasting quantities in the foundation pit of Zhuzhou second ship lock are 915 thousand m3.The first-line ship lock and Beijing to Guangzhou Railway are respectively operated on the east and west sides.A large number of houses are distributed nearby,and the bridge piers across the first ship lock are located in the blasting range.In view of the problems of many buildings around the stone blasting site,abundant groundwater and development of faults,we research the control technology of rock blasting.By using trench blasting,drilling dense holes,buffer holes,PVC casing and other technologies,the first lock and the Beijing to Guangzhou Railway all operate safely,and the piers of the first lock and nearby houses are effectively protected.The rock blasting control technology of this project can provide certain reference for the similar expansion lock rock blasting construction.