摘要
用扇形探测技术代替了常规的测量方法以提高矿井瞬变电磁法超前探测资料的解释精度.在数据采集过程中,调整巷道迎头左侧拐角处天线的法线方向与左侧巷道壁的夹角,以60°,45°和30°的夹角进行探测,在迎头断面处布置2-3个测点,调整巷道迎头右侧拐角处天线的法线方向与右侧巷道壁以30°,45°和60°的夹角进行探测.通过调整天线的法线与巷道底板的夹角,探测巷道顶板、顺层和巷道底板方向上介质的电性变化情况.研究结果表明：在超前探测中使用扇形探测技术可提高巷道超前探测资料的解释精度,能更准确的反映出异常体的空间特征.在实际应用中探测成果图上钻孔中心点位置与实际揭露钻孔中心点位置误差不到2 m.
Sector detection technology was used to enhance the explanation accuracy of mine transient electromagnetic method in advanced detection instead of conventional survey. During data acquisition and detection, the angle between the normal direction of the antenna and the left roadway is adjusted to 60°,45°and 30°respectively at the head-on left corner of roadway, two or three survey points were laid out in front of the excavated section, and then the angle at the head-on right corner of roadway is adjusted to the same degree to the left side. The variation of electric properties of medium in the roadway roof, the bedding and the roadway floor was detected by adjusting the angle between the normal direction of the antenna and the roadway floor. The results show that the data interpretation accuracy can be improved, and the spatial feature of anomaly body can be reflected more exactly using the sector detection technology in advanced detection. The position error between the bore center of detection plot and that of disclosed plot is less than 2 meters.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2007年第6期822-825,868,共5页
Journal of China University of Mining & Technology
基金
高等学校博士学科点专项科研基金项目(20050290501)
国家自然科学基金项目(40674074)
关键词
矿井瞬变电磁法
扇形探测技术
超前探测
mine transient electromagnetic methods sector detection technology
advanced detection
