The complexity of the evolution of the permeability of coal is determined by the reservoir structure. Further, there exists an interaction between the fracture matrix, which further complicates changes in permeability. When the actual mining conditions of a coal mine are considered, a permeability model that considered the combined effects of stress, gas adsorption, and temperature was proposed.
View Article and Find Full Text PDFThe seasonal variations in carbon (C), nitrogen (N), and phosphorus (P) at the organ level of during different season are poorly understood. In this study, the C, N, P, and their stoichiometric ratios in various organs of during the four seasons are discussed. The middle and young aged forests in central Yunnan province, China were chosen, and the contents of C, N, and P in fine roots (<2 mm), stems, needles, and branches were analyzed.
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