含隐伏断层底板原生缺陷致灾前兆研究
Study of Disaster Precursors of Primary Defects within Basement Plate Containing Hidden Fault
王博睿 1张远航1
作者信息
- 1. 山东科技大学安全与环境工程学院,山东青岛 266590
- 折叠
摘要
为探究隐伏断层底板复杂构造活化致灾前兆规律,遏制含隐伏断层底板原生裂隙对导水通道的促进作用,运用了FLAC3D数值模拟软件,通过对比分析得到随掘过程中原生缺陷结构辨识方法及致灾前兆规律.研究结果表明:在导水通道的形成前,原生缺陷结构沿采掘反方向长40 m、宽 30m的区域被看作原生缺陷结构的剪应力、压应力异常辨识区域;异常辨识区域内监测点剪应力不断升高,并在工作面过隐伏断层后剪应力呈下降趋势;异常辨识区域内监测点压应力都呈现"降低—升高"趋势,且监测点压应力的升高趋势亦可作为原生缺陷结构辨识信息.为安全绿色开采高承压水上煤炭资源,实现安全过隐伏构造提供科学理论及工程指导.
Abstract
In order to investigate the disaster precursor law of complex tectonic activation of the base plate of the hidden fault,and to curb the promotion of the water-conducting channel by the primary fissure of the base plate of the hidden fault,FLAC3D numerical simulation software was used to obtain the identification method of the defective structure during the process of excavation and the disaster precursor law through comparative analysis.The results of the study show that:before the formation of the water-conducting channel,the area of 40 m in length and 30 m in width along the opposite direction of mining is regarded as the abnormal area of shear stress and compressive stress of the primary defective structure;the shear stress in the monitoring points in the anomalous area is constantly increasing,and the shear stress shows a decreasing trend after the face passes through the hidden faults;the compressive stress in the monitoring points in the anomalous area show the trend of"decreasing—increasing".The increasing trend of monitoring points compressive stress can also be used as the information to recognize the primary defect structure.It provides scientific theory and engineering guidance for the safe and green mining of coal resources above high pressurized water and the realization of safe crossing of hidden structures.
关键词
隐伏断层/原生缺陷/数值模拟/致灾前兆Key words
hidden fault/primary defect/numerical simulation/disaster precursor引用本文复制引用
出版年
2025
NETL
NSTL
万方数据