半斜墙拱形煤岩巷道变形破坏试验

Experiment for deformation failure in roadway coal-rock tunnel with half oblique wall-arched

矿山巷道埋藏条件和开采环境复杂,为了探讨矿山煤岩巷道在采掘扰动中衍生的各种矿压显现特征,运用相似物理模拟与数值模拟相结合的方法,对半斜墙拱形煤岩巷道的变形破坏特征进行了试验分析。在试验设计中,对巷道模型边界采用了两相不等围压加载模式。结果表明,这种设计方案能够较好的模拟现场,所得数据与实测较吻合;巷道局部应力释放彻底,底臌及右帮变形破坏明显并主要沿软弱岩层的倾向方向发展。

In order to study the strata tunnel due to the complex conditions behaviors characteristics of mining disturbance in the coal-rock of the mine tunnel and mine environment, analyze experiment of deformation failure characters by the method of combining physical modeling and numerical simulation similar in roadway coal-rock tunnel with half oblique wall-arched. With two-phase difference confining pressures mode to load tunnel model boundary in the experimental design. The results show, test data coincided with the field, so design programs can better simulate field. Roadway local stress completely release, lead to floor heave and right sides deformation failure and mainly along the seam and the direction of the tendency of weak rock. The results provide references for roadway support and similar similarity simulation.