摘要
研究利用线圈在地下坑道中进行涌水超前探测的激发场计算方法,分析了地磁场倾角和线圈朝向对激发场计算的影响,推演出了线圈在任意地磁场倾角、任意水平朝向、任意垂直朝向、任意线圈半径和匝数时辐射空间内任意点激发场的计算方法;推演出了距离线圈不同位置点激发场数值随线圈旋转角度的变化规律.通过比较1m半径圆形线圈超前探测50m深度与100m边长方形平铺线圈向下探测100m深度的激发场,计算出了探测50m深度时,1m半径圆形线圈顺时针旋转时不同位置处激发场的大小,得出了线圈匝数的设计方法.仿真结果可为实际应用中根据线圈摆放角度与探测深度设计匝数提供参考.
The excited field numerical calculation method of coil is carried out, for water gushing from tunnel detecting forwards by Magnetic Resonance Sounding （MRS） ; the influence of excited field causing by geomagnetic inclination and the coil＇s orientation is analyzed. The calculation method of the coil＇s excited field in any point is deduced, with any geomagnetic inclination, level toward, vertical toward, coil diameter and circle number. The relationship between the excited field＇s value and the coil＇s rotation angle is deduced at different points. Different positions＇ excited field of 1 meter radius＇s coil＇s clockwise rotating are calculated, by comparing the excited field between vertical coil with 1 meter radius for 50 meters depth and level square coil with 100 meters side 100 meters depth, and the design method of circle number is obtained. The simulation results will provide reference for designing the circle number according to the coil angle and the depth in practical application.
出处
《地球物理学进展》
CSCD
北大核心
2013年第1期468-473,共6页
Progress in Geophysics
基金
科技部科技创新工作方法项目(3B810Z950537)
国家重大科学仪器设备开发专项(2011YQ030133)联合资助
关键词
核磁共振
坑道
激发场
超前探测
MRS, tunnel, excited field, detecting forward
