Novel approach to estimate vertical scale of fluctuation based on CPT data using convolutional neural networks

Zhang, Jinzhang; Phoon, Kok Kwang; Zhang, Dongming; Huang, Hongwei; Tang, Chong

doi:10.1016/j.enggeo.2021.106342

Cited by 83 publications

(21 citation statements)

References 47 publications

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“…According to Equation (7), the factors which affect the distribution of the stress deviator of the gob floor include the manifestation coefficients of rock pressure (a, b, c, and K) and geological parameters (coal seam depth H and horizontal lateral pressure coefficient λ). These parameters are bound to be different in various mining areas.…”

Section: Distribution Of the Stress Deviator Of Gob Floormentioning

confidence: 99%

“…This is because in the close‐distance coal seams mining, the downward mining method is commonly used, and the floor damage caused by upper coal seam mining endangers the mining of lower coal seam. Therefore, it is very important to study the stability of rock and soil mass 6,7 …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is very important to study the stability of rock and soil mass. 6,7 The stability of the floor surrounding rock during the mining of closely coal seams is affected by its mechanical properties and the distribution of the original rock stress field. 8 Besides, it is also affected by the mining sequence of the mining area, the relative position of the surrounding rock, and the mining area.…”

mentioning

confidence: 99%

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Study on distortion energy and stability of gob floor based on stress deviator field

Shan

Wang

et al. 2022

Energy Science & Engineering

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To analyze the plastic failure process and mechanism of gob floor in the process of close-distance coal seams mining, a simplified mechanical model of the lateral abutment pressure of the gob was proposed to derive the stress of surrounding rock. The distribution characteristics of gob floor stress deviator were obtained, and the effect of geological parameters (coal depth H and horizontal lateral pressure coefficient λ) were studied. By combining Mohr-Coulomb theory, the influence of surrounding rock cohesion c, internal friction angle φ, different coal seam depths H and different horizontal lateral pressure coefficients λ on the distribution of plastic zone of gob floor was obtained. The results showed that the distribution of the plastic zone under different geological factors is roughly the same as that of the stress deviator. This also proves that the excavation of the rock layer causes the redistribution of stress, which leads to the plastic failure of the surrounding rock. To verify the rationality of the proposed model, industrial experiments and simulation experiments were carried out. The results of on-site investigation showed that the stability and integrity of surrounding rock in the concentration area of stress deviator is far less than that in the low concentration area. In addition, the acoustic wave test and the displacement field monitoring result of surrounding rock in the simulation experiments of a similar model are basically consistent with the distribution of the stress deviator field. These results agree well with the distribution of stress deviator obtained by theoretical calculation.

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Section: Distribution Of the Stress Deviator Of Gob Floormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Study on distortion energy and stability of gob floor based on stress deviator field

Shan

Wang

et al. 2022

Energy Science & Engineering

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“…At the same seismic intensity, the size of the beams and columns and the reinforcement of the superstructure are reduced by the use of seismic-damped technology, which reduces the cost compared to seismic-resistant buildings. The cost savings for the upper part of the building are calculated using the literature [37] for a seismic-isolated scheme without changing the structural type of the building C sd :…”

Section: Direct Construction Costsmentioning

confidence: 99%

“…Kong et al [35,36] analysed the different waveform characteristics of the structure at different periods of deformation damage to predict the development trend and pattern of the structure during damage deformation. Based on the basic characteristics and influencing factors of rock bursts and rock materials in engineering, He et al [37,38] introduced a new prediction index system and proposed corresponding control strategies.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response and Economic Study of New Light Steel-Wood-Plastic Structure in Rural Yunnan, China

et al. 2022

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A new type of light steel-wood-plastic residential structure in rural has popular in recent years in rural Yunnan, China. The application of light steel, wood, and new plastic materials in practical engineering is gradually increasing due to its advantages of green ecology and waste utilization, and its response characteristics under earthquakes have attracted great attention. In this paper, seismic-resistant models, seismic-isolated models, and seismic-damped models for multistorey light steel-wood-plastic structures were established using the SAP2000 finite element software based on different seismic response methods. The seismic-isolated model is divided into five schemes, namely, LRB400, LRB500, LRB600, high damped, and friction pendulum-isolated bearings, and the seismic-damped model is divided into three schemes, namely, ordinary bracing, soft-steel bracing, and BRB bracing at the same locations around the 2nd floor of the building. Nonlinear time analysis was carried out for the nine schemes, comparing the period, structural interstorey displacement, base shear, top displacement, top acceleration, and economy of the structure under the action of an 8-degree earthquake. Results show that the period of the seismic-isolated system increased by approximately 130% compared to the seismic-resistant system, and the period of the damped system decreased slightly compared to the seismic system, the interstorey displacement, base shear, and top acceleration of both the seismic-isolated system and the damped system were smaller than those of the seismic-resistant system, and the seismic-isolated system decreased by approximately 40% compared to the damped system, and the seismic-isolated system was more effective than the damped system. From the comparison of postearthquake damage cost and full-cycle cost, the economic performance of the seismic-isolated structure is better than that of the damped and seismic-resistant structures. The conclusions of this paper can provide a scientific reference for promoting the use of new light steel-wood-plastic residential buildings.

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Effect of Adjacent Excavation on Existing Tunnels in Spatially Variable Soil

Zhang,

Huang

2024

Lecture Notes in Civil Engineering

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Novel approach to estimate vertical scale of fluctuation based on CPT data using convolutional neural networks

Cited by 83 publications

References 47 publications

Study on distortion energy and stability of gob floor based on stress deviator field

Study on distortion energy and stability of gob floor based on stress deviator field

Seismic Response and Economic Study of New Light Steel-Wood-Plastic Structure in Rural Yunnan, China

Effect of Adjacent Excavation on Existing Tunnels in Spatially Variable Soil

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