State Key Lab of Coal Resources and Safe Mining.China University of Mining and Technology ( Beijing)School of Electromechanical and Information Engineering,China University of Mining and Technology ( Bejing)

为解决目前地质雷达技术在矿井灾害源超前探测中存在的探测范围小、精度低的难题,提出了一种新型可用于矿井灾害源超深探测的地质雷达天线技术,设计并开发了一种分体插拔式低频组合天线,涉及12.5、25.0和50.0 MHz三种频率。结果表明:天线的板状结构设计,增强了天线的方向性;天线阻抗及加长杆接口设计,在天线系统馈点实现与环境的阻抗匹配,增强了天线带宽并减少了驻波干扰;应用该新型天线进行了矿井超前探测试验,结果表明该新型天线可有效探测30 m以上直径大于3 m的地质灾害源的位置和深度,突破了目前30 m探深局限,最大探测深度可达到80 m。

in order to solve a small etection scpe and low accuracy problems existed in the pilot delection of the mine disaster sources with the present geological adar a nev geological radar antenna was provided to the utra deep detecion of the mine disaster souces.An separated plug type low frequency combined antennawas designed and developed and was related to three frequencies of 12.5.25. and 50.0 MHz.The resuts showed tht the anen with a plate-ype stoucture designcould enhance the directivity of the antena. The antenna impedance and the interace design of thelengthened bar could real e the enironmentimpedace machedin the feeding poit of the antenna system.coud enhance the antenmna bandwidth and could reduce the standing wave interference. The nev anen a was appied to thamine plot detection experinent.The results showied that the nevw antena could efiectvely detecthe location and dephof the geogicaldisaster source with distance over 30 m and a diameter over 3 m,could break the present 30 m detection depth limit and could have the max detection depth of 8o m.

“十二五”国家重大科学仪器设备开发专项资助项目(2012YQ030126)；国家自然科学基金资助项目(41504112)；