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Zheng-Yuan Qin

2 papers indexed here

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Open access Sep 2026

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...

Qi Zhang, Jin-Long Jia, Zhi-Guo Li et al. · 0 citations
Open access Sep 2026

Diagnosing GEDI Canopy Height Errors in Steep Mountainous Forests: Ground Elevation Representation and Geolocation Uncertainty

Spaceborne LiDAR provides essential observations of forest vertical structure, yet canopy height retrievals remain vulnerable to terrain-related errors in steep mountainous forests, where terrain heterogeneity complicates attribution of error to footprint geolocation and ground elevation representation. To distinguish...

Fu-Qiang Shen, Xiao-Hai He, Yan-Chao Gu et al. · 0 citations

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