While it may seem safer and more polite, riding single file along the limit line encourages drivers to pass cyclists in a dangerous manner, rather than change lanes to safely go around them. And it increases the likelihood that passing motorists will try to cut back in between the riders to...
With an increase in the air curtain jet angle, the air curtain convergence gradually forms a complete air curtain, but when the air curtain jet angle continues to increase, the air curtain cannot effectively block the wind flow due to the transverse pressure from the roadway. When the jet ...
In order to obtain the stress control effect of hydraulic fracturing, a numerical mining model (FLAC 3D) was established, and the calculation results are shown in Figure 5. When hydraulic fracturing technology is adopted, the goaf fully collapses, and the caving line overlaps with the pressure ...