Failure mechanism and control of deep gob-side entry

Gob-side entry (GSE) is defined as caving that is developed along the gob with a yield pillar. Compared to other entry layouts, GSE has many advantages, such as the advantageous stress environment, high recovery rate, and prevention of coal bumps. Recently, many Chinese coal mines have reached deep mining depths. As a result of the high stress in deep mining conditions, severe bulk and dilatant deformation has occurred in deep GSE (DGSE). The...