Effects of Water and Brine Saturation on Mechanical Property Alterations of Brown Coal

The adsorption of moisture or brine into coal causes the coal mass mechanical properties to be significantly altered, which can greatly affect the coal mining and coal seam gas extraction process. A study was therefore initiated to investigate the influence of moisture and brine saturations (5–25%) on brown coals’ strength through a series of unconfined compressive strength tests, with the aid of acoustic emission, optical 3-D...