On the basis of the investigation,with the rockmass mechanics and numerical simulation, the mechanism of roof falling of stope and mined out area on a large scale are discussed compendiously.

• 根据近几年对石膏矿山的现场调查,结合岩体力学的相关理论和数值模拟技术,对石膏矿采场顶板冒落及大规模采空区顶板冒落机理作了简要探讨,据此提出了预防采空区冒落的措施。