Deformation and Failure Mechanism of Roadway Sensitive to Stress Disturbance and Its Zonal Support Technology
Deformation and Failure Mechanism of Roadway Sensitive to Stress Disturbance and Its Zonal Support Technology
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应力扰动敏感巷道变形破坏机理及分区支护技术
DOI：
10.1155/2016/1812768
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发表时间：
2016-01-01
影响因子：
1.6
通讯作者：
Wang, Guang
中科院分区：
文献类型：
--
作者：
Yao, Qiangling;Li, Xuehua;Wang, Guang
祁东煤矿6163运输大巷穿越断层带，造成围岩严重变形，需多次修巷。根据断层区的地质特征，分析了影响巷道变形破坏的因素，提出了应力扰动敏感巷道的概念。本文采用现场监测、理论分析和数值模拟相结合的方法，研究了深基坑围岩变形破坏机理。围岩变形包括浅部岩石的扩容和深部岩石的离层。水平和纵向裂缝演化为离层和破碎带;或者，裂缝可以演化为破碎带，新的裂缝延伸到更深的岩石。断层对半径约27 m的围岩应力场产生影响。其影响最大的是肋岩体的竖向应力，影响最小的是底板岩体的竖向应力。根据我们的研究结果，我们提出了一个分区支护系统的巷道通过断层。工程实践表明，该方法能有效控制巷道围岩变形，保证矿井正常安全生产。
The 6163 haulage roadway in the Qidong coal mine passes through a fault zone, which causes severe deformation in the surrounding rock, requiring repeated roadway repairs. Based on geological features in the fault area, we analyze the factors affecting roadway deformation and failure and propose the concept of roadway sensitive to stress disturbance (RSSD). We investigate the deformation and failure mechanism of the surrounding rocks of RSSD using field monitoring, theoretical analysis, and numerical simulation. The deformation of the surrounding rocks involves dilatation of shallow rocks and separation of deep rocks. Horizontal and longitudinal fissures evolve to bed separation and fracture zones; alternatively, fissures can evolve into fracture zones with new fissures extending to deeper rock. The fault affects the stress field of the surrounding rock to ~27 m radius. Its maximum impact is on the vertical stress of the rib rock mass and its minimum impact is on the vertical stress of the floor rock mass. Based on our results, we propose a zonal support system for a roadway passing through a fault. Engineering practice shows that the deformation of the surrounding rocks of the roadway can be effectively controlled to ensure normal and safe production in the mine.