Zhi-Guo Li

The evolution characteristics of gas pressure around coal seam directional long extraction boreholes with nonlinear extraction negative pressure

Nonlinear pressure of coal seam gas in the directional borehole and surrounding areas affects extraction efficiency. A multi-field coupling numerical model, including gas desorption, diffusion, fracture seepage, and borehole extraction, is developed for the No. 3 coal seam of the GJH mine. Using the numerical simulatio...