Numerical simulation scattered imaging in deep mines

Hu, Mingshun; Pan, Dong; Li, Juanjuan

doi:10.1007/s11770-010-0249-2

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…This method was also applied in other relative fields due to its advantage in imaging scattered waves [16,17]. In this paper, we use numerical simulation method to determine the feasibility and effectiveness of the application of EOM in improving the accuracy and resolution of detection for flaws within concrete structure by ultrasonic wave.…”

Section: Article No 40 the Civil Engineering Journal 4-2017 --------mentioning

confidence: 99%

Numerical Simulation of Ultrasonic Detection for Concrete Structure Based on Equivalent Offset Migration

Ming-shun¹,

Li²,

Pan³

et al. 2017

CEJ

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Ultrasonic wave testing is a classic Non-destructive testing (NDT) method to detect, locate and monitor the crack/fracture in construction materials. However, it is still hard to examine those small abnormal bodies since effective reflected signal from abnormity is usually rather weak. In this paper, a new ultrasound imaging technique, equivalent offset migration (EOM), is studied to demonstrate the feasibility and applicability for detecting concrete cracks. Thus, a complex numerical model along with six small scale flaws was built, and then the ultrasonic wave propagation in concrete was modeled by high order finite difference approximation method. Numerical simulation indicates that 1) there exists a strong scattering phenomenon while ultrasound propagates in concrete with multiple small scatter flaws, and 2) EOM is capable of imaging small flaws in concrete with high resolution and accuracy.

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Section: Article No 40 the Civil Engineering Journal 4-2017 --------mentioning

confidence: 99%

Numerical Simulation of Ultrasonic Detection for Concrete Structure Based on Equivalent Offset Migration

Ming-shun¹,

Li²,

Pan³

et al. 2017

CEJ

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“…In recent years, the analysis of diffracted and scattered waves has become an emerging trend in geophysics owing to its potential for imaging at higher resolutions than channel waves (Zhao et al 2020;Xi and Huang 2020). The analysis of diffracted and scattered waves can effectively identify discontinuous geological bodies (Wu and Aki 2012;Schmandt et al 2019;Mangalampalli et al 2022) to a degree suitable for the detection of small structures in coal mines (Hu et al 2010;Liu et al 2022). However, seismic waves of different types and directions are mixed at a coal face.…”

Section: Introductionmentioning

confidence: 99%

Detection of geological anomalies in coal mining working faces using a scattered-wave imaging method

Zhang

Cai

Liu

et al. 2023

J Petrol Explor Prod Technol

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A concealed geological structure encountered during the excavation of a coal working face could connect the working face to high-pressure water in limestone strata, which can result in a serious or catastrophic water inrush accident. However, existing geophysical detection methods used to ensure the geological safety of working faces cannot detect small geological anomalies reliably. Based on the generalized theory of scattered waves, we have developed a novel and superior scattered wave imaging method for the detection at the roadway lateral wall, capable of wave vector extraction and multiwave imaging. In this method, the waves scattered from a geological anomaly can be dynamically and accurately extracted by the polarized filter function during the mapping processes of common scattering point (CSP) gathers. A numerical simulation was performed to study the seismic wave response characteristics of a small collapse column in a coal working face. The P and channel waves of the model were extracted and imaged using the novel imaging method. A field study of three-component seismic detection was performed in the Xuzhuang Coal Mine, demonstrating that the joint imaging of body and channel waves can detect small drop faults invisible to channel wave imaging alone. These results indicate that the proposed method can effectively image anomalous bodies on working faces in complex and noisy mine wavefields using multiwave information, providing a new approach for the reliable and timely detection of hazardous geological features hidden in working faces.

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Study on the scales of heterogeneous geologic bodies in random media

Liu

2011

Appl. Geophys.

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Numerical simulation scattered imaging in deep mines

Cited by 4 publications

References 12 publications

Numerical Simulation of Ultrasonic Detection for Concrete Structure Based on Equivalent Offset Migration

Numerical Simulation of Ultrasonic Detection for Concrete Structure Based on Equivalent Offset Migration

Detection of geological anomalies in coal mining working faces using a scattered-wave imaging method

Study on the scales of heterogeneous geologic bodies in random media

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