构造活化的微震监测与数值模拟耦合研究

COUPLING STUDY OF MICROSEISMIC MONITORING AND NUMERICAL SIMULATION FOR TECTONIC ACTIVATION

采用高精度微震监测技术对长壁工作面断层、陷落柱、高角度裂隙带等地质异常体的灾变过程进行监测,为突水危险工作面预警突水灾害提供"通道形成、扩展和灾变"的动态信息;同时,将数值模拟得到的工作面围岩中的位移场和应力场与微震监测得到的断层、陷落柱、高角度裂隙带等地质异常体活化信息进行耦合分析,揭示采动引起构造活化和灾变的机制。根据微震监测与数值模拟耦合分析结果,结合试验工作面围岩中断层、陷落柱、高角度裂隙带等分布情况,实施针对性的防治水工程。分析结果证明:微地震监测与数值模拟耦合分析方法能够用于构造活化的研究和指导矿山防治水工程。

Microseismic monitoring technology is applied to the catastrophe process monitoring of geological anomalous bodies,such as faults,karst collapse columns and high angle fractured zone long wall face. It provides dynamic information including propagation,growth and failure of the channel for warning the underground water inrush hazard of dangerous working face. Coupling analysis of displacement field and stress field of surrounding rock at the working face by numerical simulation method and the activation information of geological anomalous bodies such as faults,karst collapse columns and high angle fractured zone obtained by microseismic monitoring technology is conducted to reveal the mechanism of tectonic activation and mutation induced by mining. According to the coupling analysis results,combined with the distribution of faults,karst collapse columns and high angle fractured zone at tested working face,some targeted water proof and control projects are implemented. The analysis results prove that the coupling analysis method of microseismic monitoring and numerical simulation can be used to study the tectonic activation and can provide guidance for water proof and control of mining project.