What is it that blasting equipment can't be destroyed by explosion in the following time and weather?

Night, rainy day, foggy day, weather above the third wind.

Under the conditions of strong wind, rain and snow and bad weather at night, it is not allowed to destroy by explosion. When blasting equipment is destroyed by explosion, a detonator must be used for initiation.

Detonators must be destroyed by explosion. When destroyed, the detonator should be packed, put in the pit and detonated with 2-4 cartridges. The number of detonators destroyed at one time shall not exceed 1 1,000 rounds. The weight of blasting equipment destroyed by explosion shall not exceed 20 kg.