Experimental study on changes of pore structure and mechanical properties of sandstone after high-temperature treatment using nuclear magnetic resonance

Variations of the mechanical properties and the pore structures of rocks after high-temperature treatment play a significant role in ensuring the operation of underground coal gasification and prevent the pollution of groundwater. In this study, to quantitatively analyse the pore structure and mechanical properties of sandstone after treatment at different temperatures (25 °C, 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, 600 °C, 700 °C, 800 °C, and...