矿井雷达波走时层析成像精度的影响分析及参数优化研究  

Research on the influence analysis of Radar traveling time tomography in mine and parameter optimization

作　　者：孙明浩 许献磊[1,2] 张迪 Sun Minghao;Xu Xianlei;Zhang Di(State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China;State Key Laboratory of Water Resources Protection and Utilization in Coal Mining,Beijing 100005,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]煤炭资源与安全开采国家重点实验室,北京100083 [2]煤炭开采水资源保护与利用国家重点实验室,北京100005 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《矿业科学学报》2022年第1期134-142,共9页Journal of Mining Science and Technology

基　　金：北京市科技计划(Z201100004520019,Z191100001419005);煤炭开采水资源保护与利用国家重点实验室开放基金(SHJT-17-42.6)。

摘　　要：矿井工作面内的隐伏灾害源是矿井安全生产的主要隐患,雷达波走时层析成像技术可实现大跨度开采区内隐伏灾害源的高精度探测。本文首先提出了层析成像精度评价标准,包括反演速度场和实际速度场速度差的方差、反演异常体中心偏离程度和大小偏离程度;其次通过正演模拟分析不同点间距、不同出射角度和不同反演网格参数对矿井地质雷达层析成像精度的影响规律,并对观测系统及反演参数进行优化;最后应用优化参数进行矿井雷达波走时层析成像探测实验,结果表明,在100 m跨度范围内可有效进行异常体的探测。本研究为矿井大跨度工作面内隐伏灾害源的快速精细探测提供有效的技术支撑。Concealed hazard sources in the working face are the main hidden danger for safe production in the coal mines, and the Radar Travel Time Tomography technology can realize the high-precision detection of the concealed hazard source in the large-span working face.This paper puts forward an evaluation criteria for tomographic accuracy, including the evaluation indicators of variance of velocity difference between inversion velocity field and actual velocity field, deviation degree of the inversion center of the anomalous body, and deviation degree of the size of the anomalous body.Then the influence of radar traveling time tomography by point spacing, transmitting angle and inversion grid in mine is analyzed through forward modeling, resulting in the optimized parameters for observation system and inversion.Finally, the optimized parameters are employed to carry out some field verification experiments, and the results show that the anomalous body can be detected affectively for the working face within 100 m span, providing effective technical support for the rapid and precise detection of concealed hazard sources in large-span working face in mine area.

关 键 词：矿井 隐伏灾害源 地质雷达 走时层析成像 精度分析 参数优化 

分 类 号：P631.2[天文地球—地质矿产勘探]