石膏矿山顶板破坏机理探讨

近几年来，国内的石膏矿山中，大规模采空区顶板冒落事故频繁发生。目前，对于石膏矿山大规模顶板冒落发生机理研究的还很少。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，得出石膏矿采场顶板冒落及大规模采空区顶板冒落主要是由于石膏矿柱流变特性使其强度变低及随着采区的扩大，石膏矿柱应力增大等而引起的。

Discussion on Roof Failure Mechanism of Gypsum Mines

The roof failure accidents in large mined-out area have frequently occurred in domestic gypsum mines in recent years. Up to now, little study has been made on the mechanism of the large roof failure occurrence in gypsum mines. Based on the site investigation on the gypsum mines and in combination with the related rock mechanism theory and numerical simulation technology, it is concluded that the roof failure in the stope and in the large-scale mined-out area in gypsum mines is mainly induced by the decrease of the strength of the gypsum pillars due to its rheology and by the increase of the stress of the pillar due to the expansion of the mining area.