Deformation and fracture evolution of surrounding rock for shallow underground projects

作者：Xu Mengtang^*; Zhang Dongsheng; Zhang Wei

来源：Electronic Journal of Geotechnical Engineering, 2013, 18 R: 3895-3908.

• Combined supports
• Deformation and failures
• Deformation and fracture
• Detecting roof-drillings
• Fissure evolving law andfracture characteristics
• Mechanical properties test
• Roadway surrounding rock
• Wire meshes

Based on mechanical properties test of roadway surrounding rock and deformation observation of the air and auxiliary shaft in Madiliang coal mine, general law of roadway deformation and failure for shallow underground projects was summarized. Fissure evolving law and fracture characteristics of the two roadways in the conditions of different support patterns were researched by detecting roof-drillings. The results show that the rock of Madiliang coalmine is integral and stable, and the lithology is close. Fissures evolve from the superficial to the deep until being saturated. The deformation law of the air and auxiliary shaft tends to be consistent, but the deformation speeds are different. Width of fractured zone and number of fracture in the two roadways increase with time, while the rate of increase decreases with time. The supporting effect of roadway in auxiliary shaft (combined support with anchor, wire meshes and cable) is better than that in air shaft (U steel support).

• 出版日期2013
• 单位中国矿业大学（北京）