"围岩-煤体"系统失稳破坏及冲击地压预测的探讨

根据“围岩－煤体”系统在开采过程中力学结构和力学状况的运动变化特征，分析了顶板岩层对煤体缓慢加载和瞬间加载的两种作用方式，研究了瞬间加载时“围岩－煤体”系统从稳定状态到失去稳定的物理、力学过程，提出了冲击地压发生的判别准则，在现场取得了较为成功的应用。

Discussion on Unstability and Damage of Surrounding Rock-Coal Mass System and Prediction of Rock Burst

In accordance with the movement and change rules of mechanical structure and state of surrounding rock coal mass as a system during coal excavation, two kinds of effects of roof on coal seam, i.e. slow and instantaneous loading, were analyzed. The physical and mechanical process, in which surrounding rock coal mass system reaches an unstable state from a stable one due to the instantaneous load, was investigated, and the criteria of predicting rock burst were put forward. These criteria have been applied successfully in the prediction of rock burst in Tangshan Coal Mine.