Abstract: Intelligent initiation system is one of the important means to effectively improve blasting safety control level.At present,there are still some problems,such as insufficient initiation energy or wrong network connection.A wireless remote intelligent blasting system based on LoRa IOT is developed,comparing the differences between LoRa technology and mainstream wireless communication technology,briefly describing the intelligent detonation.LoRa communication technology and HM-TRLR-S433MHz wireless remote intelligent blasting system has the advantages of long communication distance,strong anti-interference,small size,etc.;GPS module selected Air530Z module,digital electronic detonator receiving module for Zigbee wireless transmission module,using MBus driver circuit to send the detonation signal to the digital electronic detonator,which could realize wireless initiation.The safety control and power supply design principle of the system is implemented to test the anti-interference and system reliability of the wireless remote intelligent blasting system for different distances and terrains.The results show that the system operates stably in the horizontal distance range from 200 m to 1 000 m and in the height difference range from 50 m to 100 m,and the module normal rate exceeds 90% under electromagnetic interference and stray current interference,and the vibration interference meets the design requirements,so the system reliability is up to 100%.The research results achieve independent operation of each digital electronic detonator,intelligent control of blasting area,improve the efficiency and safety of blasting network connection,provide technical support for intelligent blasting construction,scientific management and decision-making.

Key words: intelligent blasting,remote intelligent initiation system,LoRa technology,Internet of Things (IOT),digital electronic detonator,blasting network