应力波作用下巷道层裂破坏的数值模拟研究

Numerical simulation on layered crack and failure of roadway under stress wave

采用LS-DYNA软件,对扰动应力波作用下巷帮围岩层裂破坏结构的形成过程、扰动应力波强度pmax对层裂结构形成的影响进行了有效的数值模拟,得到了一定巷道围岩应力状态下巷帮围岩层裂结构的形状、厚度等特征。结果表明:扰动应力波是形成巷帮层裂结构,继而诱发冲击矿压的重要因素;扰动应力波的强度决定了是否形成巷帮层裂结构及其层裂结构的范围大小。研究结果对揭示煤矿冲击矿压的诱发机理,及采取有效地防治技术具有重要意义。

The forming process of the layered crack and failure structure and effect of the disturbing stress wave intensity Pmax on the forming of the layered crack and failure structure is simulated in software LS-DYNA. The characters of the shape and thickness of the layered crack structure of the surrounding rock in the roadway-rib are acquired. It shows the stress wave disturbance is an important factor to form layered crack and failure structure and induce the rockburst; and intensity of the stress wave decides whether the layered crack and failure structure is formed and how for the structure grows. It has an important significance of researching the mechanism of inducing rockburst and taking effective measures to control rockburst.