岩石基复合材料支护采空区动力失稳声发射特征统计分析

Statistical analysis of the character of acoustic emission for nonlinear dynamical damage in mined out areas supported by composite rock materials

基于声发射智能监测技术 ,对玲珑金矿 2 5 5m水平坚硬岩石复合材料支护的主运巷采空区结构失稳过程进行了实时监测 ,利用固体断裂非平衡统计理论进行统计推断 ,分析采空区围岩断裂失稳过程中微破裂的时空演化规律以及变形与声发射间的内在联系 ,同时在统计分析过程中考虑了不同因素对围岩破裂过程与失稳模式的影响 ,这对于工程安全监测与评价有很大的现实意义。

Based on intelligent acoustic emission technique, the dynamical monitoring of material and structure damage of the collapsed areas supported by composite hard rock materials in transport roadways of Linglong gold mine has been carried out. The non equilbrium statistical theory of solid fracture is used to predict the stability and damage process of the main transport roadway at 255 m level. The monitored results are used to seek out the inherent spatial and temporal rule of the fracture and damage, the intrinsic relation between the damage model and the nonlinear characteristic parameters of acoustic emission during the process of tunnel failure. Parametric statistical analysis is also conducted to asses the effect of various factors on the failure process and failure model. It is a matter of great significance for the safe inspection and evaluation of composite rock engineering.