Multifractal Characteristics of Pore Structure Evolution in Thermally Damaged Coal-Seam Roof Sandstone Under O2 and CO2 Atmospheres: Implications for Underground Coal Gasification
This study investigated how high-temperature reactive atmospheres associated with underground coal gasification (UCG) differentially modify the pore system of roof sandstone. Roof sandstone from the Shanghai Miao mining area, Inner Mongolia, was conditioned to simulate formation-water saturation and heat-treated at 200...