Risk assessment of water inrush in tunnel through water-rich fault based on AHP-Cloud model

Peng, Yaxiong; Wu, Lenan; Zuo, Qingjun; Chen, Chuansheng; Ye, Hao

doi:10.1080/19475705.2020.1722760

Cited by 31 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analytic hierarchy process determines the subjective weight. Analytic hierarchy process 14,15 is a subjective weighting method. It mainly decomposes the objectrelated influencing factors, establishes a hierarchical structure according to the mutual relations among factors and compares multiple factors in pairs and quantifies qualitative problems, which improves the rationality and effectiveness of decision-making to some extent.…”

Section: Combinatorial Weighting Methodsmentioning

confidence: 99%

Optimization principle and application of forced ventilation in railway tunnels based on improved TOPSIS theory and CFD simulations

Chen

Huang

2021

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The optimization of forced ventilation in tunnel construction becomes the key problem to improve the construction environment and energy saving. The influence of main factors on the flow field is considered for orthogonal experimental design and optimization, which includes the distance between the air duct outlet and the tunnel face, the bench length, the bench height, and the position of the air duct. Thus, the TOPSIS theory was adopted for the optimization method and improvement, and a series of CFD simulations were applied to analyze optimal solutions. The results show that the improved TOPSIS theory with entropy weight method and analytic hierarchy process could effectively solve the optimization problem of forced ventilation in tunnel construction. Based on this optimization principle, a case was analyzed, and the optimized ventilation parameters are obtained to improve ventilation efficiency and save energy. In the optimization scheme, the flow field in the tunnel is stable and the wind is strong enough to ventilate. Besides, there is none huge vortex, which might disrupt the stable flow field and reduce energy efficiency. It could improve the ventilation efficiency and stability, save time and cost, and bring considerable economic and social benefits to the tunnel construction.

show abstract

Section: Combinatorial Weighting Methodsmentioning

confidence: 99%

Optimization principle and application of forced ventilation in railway tunnels based on improved TOPSIS theory and CFD simulations

Chen

Huang

2021

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Figure 10: Water-sediment mixture seepage hysteresis loop curves. 8 Geofluids size and fracture opening, as the sand mass concentration increased, the seepage velocity and pressure gradient increased rapidly in linear type. The mass concentration increased from 20 kg/m 3 to 80 kg/m 3 .…”

Section: Variation Laws Of Water-sediment Mixture Seepagementioning

confidence: 99%

“…Liquid seepage not only exits inside rock fissures during the coal mining process, but also could be found in geotechnical engineering such as tunnels, foundation pits, and slopes. Therefore, the research on seepage characteristics inside rock fissures is always a hotspot [8][9][10]. Scholars have studied the influences of surface roughness of fracture, loading conditions, and stress paths on seepage in rock fissures through laboratory tests [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Hysteresis Characteristics of Water-Sediment Mixture Seepage in Rock Fractures

Cao

Zhang

et al. 2021

Geofluids

View full text Add to dashboard Cite

The hysteresis of water-sediment mixture seepage in rock fractures is one of the critical factors which affect the determination of the timing of coal mine water inrush disasters prevention and control. In this paper, a mechanical model was established to study the hysteresis whose criteria were also put forward. The area of the hysteresis loop and the maximum pressure gradient were selected as characterization parameters of hysteresis. On this basis, an experimental system was established to study influences of different sand particle size, sand mass concentration, and fracture opening on water-sediment mixture seepage in rock fractures. The results indicated that the increase in the sand particle size and sand mass concentration could effectively enhance hysteresis characteristics of specimen fractures. While hysteresis characteristics decreased significantly with the increase of fracture opening. The research results are useful to prevent and control water inrush disasters of coal mine.

show abstract

“…So far, the research studies about the mechanism of water bursting and mud bursting have been focused on the water bursting owing to the high-pressure fracture in rock masses Meng et al, 2020), karst water bursting Huang et al, 2019;Zhu and Li, 2020), and activated water bursting in fault zones (Guo et al, 2020;Peng et al, 2020;Yang et al, 2020). However, very few research studies in the past years paid their attention on the mechanism of water bursting and mud bursting , especially the variable mass characteristics about the evolution of water bursting and mud bursting in fully weathered granite were not involved.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Water-Rich Fully Weathered Granite on Water Bursting and Mud Bursting

Zheng

2021

Front. Earth Sci.

View full text Add to dashboard Cite

In order to investigate the mechanism of water-rich and fully weathered granite on the water bursting and mud bursting, the single-factor variable method is adopted in this study. The particle size gradation, initial porosity, water pressure, confining pressure, and anti-outburst thickness are chosen to determine each factor on the evolution of sand gushing, porosity, permeability, fine particle concentration, and water gushing velocity. Results indicate that a particle loss is the most critical reason for the water bursting and mud bursting of water-rich and fully weathered granite. The transition of water bursting from the linear to the nonlinear stage is the most significant feature. Soil particles with a larger Talbol power index are more likely to lead to water bursting. In addition, there is a critical water pressure to control the occurrence of water bursting and mud bursting. It is found that when the confining pressure reached the soil yield strength, the evolution of water bursting and mud bursting is independent of the increase in confining pressure. The increase in anti-outburst thickness can also effectively limit the risk of water bursting and mud bursting.

show abstract

Risk assessment of water inrush in tunnel through water-rich fault based on AHP-Cloud model

Cited by 31 publications

References 31 publications

Optimization principle and application of forced ventilation in railway tunnels based on improved TOPSIS theory and CFD simulations

Optimization principle and application of forced ventilation in railway tunnels based on improved TOPSIS theory and CFD simulations

Experimental Study of Hysteresis Characteristics of Water-Sediment Mixture Seepage in Rock Fractures

Experimental Investigation of Water-Rich Fully Weathered Granite on Water Bursting and Mud Bursting

Contact Info

Product

Resources

About