关键词: 断层, 动力灾害, 变形能, 应力分布, 相似模拟

Abstract: The occurrence of the mine geological hazards is directly determined by the Characteristics of fault structures and other geological conditions which are also the main factors induced dynamic disasters and accidents in coal mine. By using the physical simulation method, we studied the distribution characteristics of stress field in the coal mining under the condition of two fault coupling. It was indicated from the simulation results that the advancement of the mining face led to the first fault attachment stress increase amplitude is greater than the second fault before the fault slip. The reason is that the advancement of the mining face makes most of overburden pressure apply on the first fault while the stress and strain energy are accumulated in the overlying rock. After fault slip, the first fault slips instability firstly under the dynamic pressure due to the advancement of the mining face. In this situation, therefore, most of the accumulated strain energy releases and stress variation in the first fault is relatively greater than that in the seconder faults. Based on the above results, it can be seen with the respect of unstable release of stain energy that the dynamic disaster could be induced in high probability during the mining face pass through the first fault under the effectiveness of multi-faults coupling.