Study On Misfire Detection Of Open Deeep-hole Blasting

Open deep-hole blasting has been widely used in stripping and exploitation of Open-air mines and mining industrial sites flat,port construction and road construction and other area.However,blind gun will appear due to the uncertainties,it will cause accidents.Blind gun accidents inblasting have occurred because open deep-hole blasting has been no scientific testing methods.To solve this problem,the paper relying on science and technology support project in Jiangxi province,combine with the characteristics of open deep-hole blasting,use the metord of theoretical analysis,numerical simulation and field tests combined.The following aspects of the study were carried out:(1)On the basis of the existing engineering geophysical prospecting methods,put forward a detection method for blind hole blasting in open pit by FDMA,study the propagation law of electromagnetic field in the earth.It provides a theoretical basis for FDMA.(2)On the basis of theoretical study,the field test was carried out with the blind gun detection system,The testability and the resolution of the electromagnetic signal are verified.The depth of FDMA is up to 60 m.(3)Study the safety of electric cap in the working condition of FDMA detection system,The experimental analysis shows that the detection system has no effect on the safety of electric.Through a series of theoretical and experimental research,the papper analyzes the testing result,develop the blind gun detection method in open deep hole,it provides a scientific and reliable method for the detection of deep hole blasting in domestic and abroad,solve the problem of blind blasting detection of open pit blasting.