摘要
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 poor geological bodies around goal on collecting data and waveform by GPR, the square-roof goaf was constructed, the fracture and broken rock strata were loaded around the goaf （both sides and upper and lower positions）, and different materials were filled in the goaf. Then, GPRMax2D was used tO simulate the above process, so as to obtain respective hyperbola of waveform. At last, the results were verified through the space-time cross sec- tion collected from the actual undermine goaf. It was concluded that when fractures appeared in the left and right of the goal, two reflected hyperbolas of the roof presented overlapping, without bottom reflection; when cracks existed in the roof and floor of the goal, the reflection of hyperbola boundary was fuzzy, without roof reflection. When the goal was filled with water, the reflection of reflected wave curve did not existed at the bottom of the surrounding rock but was clear at two wings; and when crushed stones were filled in the goaf, the reflection was clear at the boundary of the square roof and appeared at the bottom, but the curve of the two wings was short.
作者
赵奎
陈军
邝泽良
ZHAO Kui CHEN Jun KUANG Zeliang(School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China)
出处
《矿业研究与开发》
北大核心
2017年第6期61-65,共5页
Mining Research and Development
