Put forward redistribution of stress in the mining area and Domino effect caused by unstability of coal pillar underground, resulting in sudden roof caving in the gob and surface subsidence.

• 提出了采场内煤柱失稳破坏引起采场应力重新分布，出现煤柱群连续失稳破坏的多米诺效应，从而导致采空区顶板大面积突然垮落和地表整体塌陷。