B. In order to prevent accidents, prepare necessary emergency contact nets, steel bars, sledgehammers and other materials at the blasting operation site, and organize enough emergency personnel to stand by and watch before construction.
C. In order to prevent the accidental danger in the process of blasting operation from affecting the safety of vehicle operation, protective personnel should be set up at the construction blasting operation site, and the protective personnel should be equipped with a red signal flag, which should be pasted with plastic tape. In case of special accidental danger, the vehicle should be stopped.