Simulation study on crucial parameters of long-compressive and short-suction ventilation in large section roadway excavation of LongWangGou coal mine

CO Diffusion Study and Spatial and Temporal Variation Modeling during the Construction Period of the Plateau Railroad Tunnel

“…In terms of CO transport law in tunnels, Harris and other scholars, − through on-site monitoring of CO concentration data in tunnels, analyzed the pattern of change of the monitoring data and derived the distribution of CO in tunnels over time; Torno and other scholars, − using the hydrodynamics software to establish a reasonable roadway tunnel model, defined the smoke that is blown out of the gun after the blasting time, analyzed the distribution of gun smoke under different blasting conditions, and predicted when workers could enter the workplace after blasting; Vorontsov and others − established a model of gun smoke diffusion in the roadway, concluded that the gun smoke diffusion law was significantly affected by the wind flow, and derived the calculation formula of the CO dispersion coefficient of the tunneling roadway; Zhou and others − analyzed the basic theory of mine ventilation and made a systematic research on the aspects of the mine ventilation system and the local ventilation of the mine and quarry; and so on. In addition, in-depth research has also been conducted on the ventilation design of the quarry, wind flow, and the transportation law of gas; Zhong’an and others − numerically simulated the soot flow after blasting in the tunnel and gave an optimal ventilation scheme for the actual engineering situation, which provided a reference basis for the numerical simulation of soot ventilation in the tunnel.…”

Numerical analysis and control technology of gas accumulation in a large-scale specially-shaped tunnel passing through coal bearing strata

“…When optimizing the distribution of air flow field in a tunnel, the optimization parameters of improving ventilation efficiency and reducing energy consumption in the tunnel are obtained by using TOPSIS theory and CFD fluid simulation software (Wu et al, 2021). In order to ensure the accuracy of numerical simulation results, the distribution of air flow velocity in the tunnel is studied by using numerical simulation technology and field in-situ measurement method, focusing on the key factors that may affect the accuracy of numerical simulation results (Wen et al, 2022). Through the comparison of results, only a few points with large errors are observed near the tunnel wall, so as to ensure the accuracy and reliability of numerical simulation calculation (Krol et al, 2019).…”