Rockburst Prediction Model Based on Entropy Weight Integrated with Grey Relational BP Neural Network

Zheng, Yuchao; Zhong, Heng; Fang, Yong; Zhang, Wensheng; Liu, Kai; Fang, Jing

doi:10.1155/2019/3453614

Cited by 20 publications

(10 citation statements)

References 53 publications

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“…(6) Electrical equipment in high concentration methane tunnel should have short-circuit protection rather than exposing sparks to the air. Preventive techniques such as grouting, foam injection and sealed lining should be used for gassy outburst and water inflow (Duan et al 2019;Zheng et al 2019; Technical Code for Railway Tunnel with Gas (TB10120-2002) n.d.).…”

Section: Resultsmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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This Express Letter reports three methane explosion accidents during tunnel construction in Southwest China. In recent years, tunnel construction of China is developing rapidly. The geological conditions of the tunnel passing through are extremely complex, especially, tunnels in coal strata increase rapidly, what's worse, many methane explosions occur during the tunnel construction. The backgrounds, causes and rescue operation of three methane explosion accidents situation are studied. Furthermore, we proposed relevant measures to prevent methane explosions of tunnels. ARTICLE HISTORY

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Section: Resultsmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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“…Based on the boundary conditions [24], the finite sine-Fourier transform of the fourth derivative of the displacement function with respect to the coordinate x is…”

Section: Finite Sine-fourier Transformmentioning

confidence: 99%

Vibration Theoretical Analysis of Elastically Connected Multiple Beam System under the Moving Oscillator

Feng

2019

Advances in Civil Engineering

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To investigate the vibration analysis of elastically connected multiple beam system (ECMB) under the moving oscillator, finite sine-Fourier transform has been applied to the dynamic partial differential equations of ECMB with respect to space coordinates. en, the numerical integration has been used to solve the equations. Finally, the expression for vibration analysis of ECMB under the moving oscillator has been derived based on finite sine-Fourier inverse transform. Using the method developed in this study and ANSYS numerical method, the vibration analysis of a four-layer beam system under moving oscillator with different speeds has been calculated. e results show that the calculated results from the method developed in this study are in good agreement with the ANSYS numerical calculation results, and the differences between the two calculation results are all less than 2%, which verified the correctness of the method developed in this study. e method developed in this study has been applied to the beamrail system on a railway line in China. e effect of the train speed and interlayer stiffness on the vibration of beam-rail system has been investigated. e results show that the maximum dynamic deflection of the rail under the train load is always near the midspan, while the maximum dynamic deflections of the track plate, base plate, and bridge occur after the train travel through the midspan. e interlayer stiffness has a larger impact on the vibration of the rail and the track plate and little impact on the vibration of the base plate and the bridge.

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“…e calculation result is shown in Figure 20. [52][53][54][55][56], minimal attention has been given to the e ects of above-crossing tunnel construction on the underlying existing tunnels. Chen [57] and Ding [58] carefully reported the monitoring results of the longitudinal vertical displacements of the exiting Metro Line-2 tunnels due to the abovecrossing of Metro line-8 twin tunnels in Shanghai.…”

Section: Ground Settlementmentioning

confidence: 99%

Effect of Expanding a Rectangular Tunnel on Adjacent Structures

Wang

Kong

Wang

2018

Advances in Civil Engineering

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e expansion of urban underpass has become the mainstream of development to cope with urban congestion, and the effect on adjacent existing structures during enlarging construction is also an important issue in the construction process. In order to better understand the influence of tunneling on adjacent structures, the pedestrian underpass expanding project above-crossing Xi'an Metro Line 1 was investigated. e aim was to analyze the deformation curves characteristics of adjacent structures by field observation of ground settlement, heave of existing tunnels, and settlement of piles. e results show that the ground settlement curve in the vertical direction of the underpass is similar to the shape of V, and the maximum settlement appearing in the center line of underpass is 18.7 mm. Due to the effect of existing tunnels on the ground deformation, the settlement curve in the parallel direction of the underpass is similar to the shape of M. Above-crossing tunneling would cause the existing tunnels to heave, and the heave mainly occurs in the range of −6 m to 12 m between the pedestrian tunnel face and the center line of each tunnel. e heave curve is similar to the shape of inverted U. e settlement of piles is linear with its axial stress and significantly affected by its location. e settlement curve of piles is similar to the shape of S in two dimensions. On the basis of deformation curves, this paper presents some equations to describe the shape of V, M, inverted U, and S, respectively, by the inverted Gaussian distribution curve, superimposed Gaussian distribution curve, Gaussian distribution curve, and arctangent function.

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Rockburst Prediction Model Based on Entropy Weight Integrated with Grey Relational BP Neural Network

Cited by 20 publications

References 53 publications

Methane explosion accidents of tunnels in SW China

Methane explosion accidents of tunnels in SW China

Vibration Theoretical Analysis of Elastically Connected Multiple Beam System under the Moving Oscillator

Effect of Expanding a Rectangular Tunnel on Adjacent Structures

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