摘要
In order to overcome the limitation that rock mass instability warnings are caused by a lack of deep consideration of the inherent mechanism of disaster formation, early warning signs of rock mass instability were detected and multi-field coupling was analyzed. A multi-field coupling model of a damaged rock mass was established. The relationship between microseismic activity parameters and rock mass stability was analyzed, and a multi-parameter early warning index system was established and its solution program was compiled. Based on the D-S data fusion theory,an early warning model of rock mass instability combining multi-field coupling analysis and microseismic monitoring was constructed. Taking an underground mine stope as an object, the multi-field coupling model and its solution program were used to analyze mining response characteristics. The seismic field data were used to verify the accuracy of the multi-field coupling analysis. The early warning model was used to predict the instability of stope rock mass,and the early warning result is consistent with a real-world scenario.
针对当前岩体失稳预警多从单个角度入手,缺乏对灾害孕育内在机理的深入考虑,开展基于多场耦合分析和微震监测的岩体失稳预警研究。建立考虑损伤的岩体多场耦合模型,并编制相应的解算程序。对微震活动性参数与岩体稳定性之间的关系进行分析,建立多参量预警指标体系。基于D-S数据融合理论,构建多场耦合分析和微震监测融合的岩体失稳预警模型。以某地下矿山采场为研究对象,应用多场耦合模型及其解算程序进行采动响应特征分析,运用微震实测数据验证多场耦合分析的正确性。通过构建的预警模型对采场岩体失稳进行预警,预警结果与现场实际情况吻合,验证了预警模型的有效性。
基金
Project(2017yfc0602901)supported by the National Key R&D Program of China during the Thirteenth Five-Year Plan Period
Project(2017zzts204)supported by the Fundamental Research Funds for the Central Universities of Central South University,China
