Field tests of blast vibrations were conducted based on the concept of interference between blast-induced seismic waves for the purpose of reducing blasting vibration intensity and controlling blasting vibration hazards. Three different blast schemes were realized by using electronic detonators, and nonel detonators were used for the fourth blast scheme as comparison. Monitoring points were arranged at the locations of 15 m, 30 m, 45 m and 60 m away from the working face. By studying variation law of the blasting vibration velocity, the optimal delay intervals between holes and rows were selected as those of the third scheme based on the characteristics of accurate timing of electronic detonators. In the third scheme, the cut holes were initiated every two holes from top to bottom with an inter-hole delay of 8 ms. The slashing holes were arranged symmetrically along the center of the working face, and initiated hole by hole with an inter-hole delay of 16 ms and inter-row delay of 100 ms. In addition, the roof holes and bottom holes were initiated with a delay interval of 100ms. This scheme was used to obtain a vibration reduction effect by wave destruction interference. The test results show that the blast parameters are the key to reduce the blast vibration intensity. With the same distance to the blast source, the peak particle velocity when electronic detonators are used is much smaller than that when nonel detonators are used. At the same time, the dominant frequency of electronic detonators is higher than that of the nonel detonators. This engineering technology has achieved significant vibration reduction effect in the blasting construction of the flood discharge tunnel of Luoning pumped-storage power station in Henan Province.

At present, there are some problems such as inadequate implementation of safety management measures and heavy burden of supervision departments in the special storage for civil explosives in commercial blasting operation units. Thus, the damage and economic burden to the blasting operation unit caused by explosion accidents of civil explosives storage are analyzed and illustrated by case studies. Combined with the new requirements of “fundamentally eliminate hidden dangers of accidents” in the “14th Five-Year Plan for the Safety Development of the Civil Explosives Industry” for the civil explosives industry, it is considered feasible to cancel the commercial blasting operation units owning or renting civil explosive storages that have passed the safety evaluation, from the perspective of the intrinsic safety of the civil explosive industry. Therefore, it is suggested that the Ministry of Public Security to modify or cancel the requirement of the item of 6.2.2.1 "a) (having or renting a civil explosive storage that has passed the safety evaluation) when revising the standard of the Qualification and management requirements for unit of blasting operation (GA990—2012). This measure can improve the safety production management system of the civil explosive industry, reduce the burden of the safety supervision department and the economic burden of the commercial blasting operation units, which is more conducive to the improvement of the intrinsic safety level of the civil explosive industry.

A waste fireworks and firecrackers destruction project in Nantong city required the destruction process to be safe and efficient. On the basis of fully understanding the characteristics of the fireworks and firecrackers to be destroyed, the principles of destruction were clarified, and the destruction plan was carefully designed in combination with the specific characteristics of the project. In the open offshore area, a 20 m×20 m site with a depth of 2 m and a maintenance slope of about 5 m was first pre-set as the destruction site. The entering and exiting roads were then arranged reasonably so as to improve the unloading efficiency. According to the traffic conditions between the storage and the destruction site, the transportation route and time were determined. At the same time, in order to ensure the safety of the transportation process, the vehicle speed, loading and unloading, placing and other technical requirements were strictly regulated. According to the size of the destruction site and the location of fireworks to be destroyed, the minimum discharge angle was calculated as 12°. Combined with the maximum height of the fireworks liftoff, the discharge area, escape area and scattered area were determined in the process of destruction, based on which the safety warning range of the destruction was set as 120 m. The joint control measures of warning personnel and UAV were adopted to monitor the destruction process in real time to ensure that the fire hazard was controlled in the initial stage. The destruction was thorough, safe and accident-free with good results.