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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (2): 54-61.doi: 10.11872/j.issn.1005-2518.2017.02.054

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Research on Application of Frequency Division Multiple Access Misfire Detection Technology and System in Deep Hole Blasting

LIU Liansheng 1,2,LAN Depei 1,ZHANG Shenghui 1,PAN Rongsen 3,CAI Jiande 4   

  1. 1.School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou   341000,Jiangxi,China;
    2.Jiangxi Key Laboratory of Mining Engineering,Ganzhou   341000,Jiangxi,China;
    3.Yongping Copper Mine,Jiangxi Copper Co.,Ltd.,Shangrao   334506,Jiangxi,China;
    4.Guangdong Hongda Blasting Engineering Co.,Ltd.,Guangzhou    510623,Guangdong,China
  • Received:2016-12-02 Revised:2017-02-20 Online:2017-04-28 Published:2017-05-12

Abstract:

Regarding the problem of the misfire in deep hole blasting,which it is difficult to detect and identify,the frequency division multiple access misfire detection technology and system based on electromagnetic wave propagation theory is developed,meanwhile,the performance of the detection system is studied.The results show that with the lower transmitting frequency of electromagnetic signal in rock-soil body,the penetration ability will be stronger and the transmission distance will be farther.Based on the condition of same horizontal distance,the amplitude variation of electromagnetic signal decreases with the increase of buried depth of the misfire,it also decreases with the increase of emission frequency of the underground signal generator,and the attenuation tendency with the increase of emission frequency is more obvious.The system response more obvious to frequency in 2 012~5 025 Hz,it has a better recognition ability when the misfires are located in the depth less than or equal to 40 m and the distance less than or equal to 30 m.Frequency division multiple access misfire detection technology and system can be successed for the detection of misfire in deep hole blasting.

Key words: deep hole blasting misfire, misfire detection and identification, frequency division multiple access method, misfire depth of subsurface, electromagnetic signal amplitude

CLC Number: 

  • TD85

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