Authors of the research consider approach to assessment possibility formation stratification and shift cracks in roof extended horizontal cavity, based on method boundary elements. The algorithm implements iterative procedure variation formed crack length with control tension its tip. At same time, angle coasts closing is defined by tensile strength layer material. smooth case equality zero thi...

Abstract Isotopic ratios of radioxenons sampled in the atmosphere or subsurface can be used to verify occurrence an underground nuclear explosion (UNE). Differences half-lives radioactive xenon precursors and their decay-chain networks produce different time-dependent concentration profiles isotopes allowing isotopic for tracking UNE histories including estimating time detonation. In this study...

Cavity under urban roads has increasingly become a huge threat to traffic safety. This paper aims study cavity morphology characteristics and proposes deep learning (DL)-based classification method using the 3D ground-penetrating radar (GPR) data. Fine-tuning technology in DL can be used some cases with relatively few samples, but case of only one or very there will still overfitting problems. ...

The world is widely exposed to risks related the presence of underground cavities, whether natural or linked human activities. These cavities represent a potential risk collapse and thus danger, particularly in urban areas. This article aims explore through numerical modeling effect mechanical characteristics soil on instability cavity. Subsequently, parametric study was conducted influence cer...

This report describes the conceptual design of a particle detector that could be deployed underground for tracking cosmic-ray muons to enable tomographic reconstruction of the overlying ground and structures. The concept of cosmic-ray muon tomography has been known for a long time but seldom used in practice since the first demonstration. Developments in technology and methods of particle detec...

During underground nuclear tests, rocks may fail by plastic yielding, which limits shear strength, or by tensile fracture, wherever maximum principal stress exceeds tensile strength. A third mode of failure exists due to friction along closed fractured surfaces. There, friction affects slipping and can thus limit stress. In this paper, we study the effect of friction on the simulated dynamic re...

This paper aims at using the Rayleigh waves which travel in the front of high speed trains (HST) to detect underground cavities within a silty ground. First, computer results show that subsurface cavities provide a filtering effect on the spectra of Rayleigh waves within a wavelength range in relation with the depth of the cavity. Then, seismic data have been collected at the front of the HST o...