Z Yongjiang, M Xianzheng, JI Fei - Mining Safety & Environmental …, 2018 - kyaqyhb.com
In view of the problem that occur in the bedding borehole of hard coal seam in low permeability, such as the range of extraction radius is small and the extraction effect is poor …
Z Yilong, WU Yan, F Shuhao, L Qi… - Mining Safety & …, 2022 - kyaqyhb.com
Taking No. 2 coal seam of Chiyu Coal Mine as the research object, the grey correlation analysis method was used to predict the drilling cuttings quantity S and gas desorption index …