基于露天开采地下盲空区探地雷达正演模拟及应用

doi:10.13722/j.cnki.jrme.2019.0357

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Abstract During opencast mining of metal mines，hidden safety hazards caused by unknown underground airspaces are often encountered，and ground penetrating radar(GPR) detection of goaf is one of the commonly used means. Aiming at the misjudgment and omission in the interpretation of GPR detection airspace types，the alternating-direction implicit finite-difference time domain(CPML-ADI-FDTD) based on convolutional perfect matching layer and the related program were deduced，and the numerical simulation experiments of ADI-FDTD algorithm and finite difference time domain(FDTD) algorithm were carried out. The results show that ADI-FDTD algorithm can use a larger time scale to improve the forward modeling efficiency of ground penetrating radar. The forward simulation of a three-core arch roadway and its crossing roadway was established. Through spectrum，power spectrum and its instantaneous phase，the water-filling situation and the convergence of roadways were analyzed and the relevant interpretation criteria were obtained. Finally，An engineering example was deduced and interpreted，which was verified by the drilling results.

Key words： mining engineering blind underground cavity ground penetrating radar forward modeling alternating direction implicit finite difference time domain convolutional perfect matching layer

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	Articles by authors
	YANG Daoxue1
	2
	ZHAO Kui1
	2
	ZENG Peng1
	2
	LI Ruixue1
	2
	WANG Xiaojun1
	2
	ZHONG Wen1
	2
	GONG Cong1
	2

Cite this article:

YANG Daoxue1,2,ZHAO Kui1, et al. Forward modeling and application of ground penetrating radar in blind underground cavities of opencast mining[J]. , 2019, 38(11): 2288-2298.

URL:

http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2019.0357 OR http://www.rockmech.org/EN/Y2019/V38/I11/2288

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