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为了研究采空区周围不同的不良地质体对探地雷达采集数据波形的影响,构建方形顶板的空区,在空区周围加载裂隙和破碎岩层(空区的两边和上下位置)以及给空区充填不同的填充物,利用GPRMax2D模拟,得到它们各自的波形双曲线,最后通过矿山采集到的空区时间剖面图进行验证,结果表明:空区周围存在左右裂隙时,顶板两反射双曲线出现交叠,无底板反射;空区上下存在裂隙时,双曲线边界反射模糊,无顶板反射。空区里充填水时,反射波形曲线无围岩底板反射,但两翼清晰,而充填碎石时,方形顶板边界处反射清晰,有底板反射,但曲线两翼延伸短。
In order to study the influence of different bad geologic bodies around the goaf on the waveform data of the GPR, the empty area of the square roof is built, and the cracks and broken rock formations are loaded around the empty area (both sides and up and down of the empty area) Filled with different fillers, using GPRMax2D simulation to get their respective waveform hyperbola, and finally by the mines collected empty time profile for verification, the results show that: the existence of space around the left and right cracks, the roof of the two reflection Hyperbolic intersection Stacked, no floor reflection; empty area up and down the cracks, hyperbolic boundaries reflect blurred, no roof reflection. When filled with water in the empty area, the reflection waveform did not reflect on the surrounding rock floor, but the two wings were clear. When filling the gravel, the reflection at the boundary of the square roof was clear and the floor was reflected, but the two wings of the curve extended short.