太原理工大学学报2024，Vol.55Issue(2)：242-251,10.DOI:10.16355/j.tyut.1007-9432.20230615
煤层底板双承压含水层下隐伏断层活化导水特征试验研究
Experimental Study on the Characteristics of Concealed Faults'Activation and Conduction under Two Layer Confined Aquifers Underlying Coal Seam Floor
摘要
Abstract
[Purposes]The existing researches on mining induced water inrush through concealed faults underlying coal seam floor only consider the condition of single confined aquifer under coal seam floor.The activation characteristics of water inrush through concealed faults under the condition of two layer confined aquifers need to be studied.[Methods]The mining stress and pore pressure evolu-tion of concealed faults at different depths during mining were analyzed by means of similar physical simulation.[Findings]The results show that the self-designed water inrush test system can reason-ably simulate the faults'activation and conducting law at different depths under the condition of two layer confined aquifers.The change degree of mining stress and pore pressure increments in shallow fault zone is higher than that of deep fault zone,and the change time of pore pressure lags behind the change time of stress.At the end of mining process,the increasing trend of pore pressure increments in shallow and deep fault zones reflects that the unloading of fault zones to the goaf promotes the devel-opment of seepage.There is a possibility of delayed water inrush in fault zones,and the risk of de-layed water inrush in shallow fault zones is relatively higher than that of deep fault zones.The degree of stress disturbance decreases with the increase of depth,and the shallow part is more likely to be ac-tivated than the deep fault zone.Continuous disturbance will generate the hydraulic connection be-tween the shallow and deep aquifers,the deep confined aquifer can recharge the shallow confined aqui-fer through the concealed fault,and there is significant head pressure loss in the process of confined water inrush through fault zones.[Conclusions]The results can provide theoretical and practical refer-ence for the analysis of concealed fault's activation and conduction mode under the condition of multi-ple confined aquifers underlying coal floor.关键词
煤层底板/隐伏断层/双承压含水层/活化导水/试验研究Key words
coal seam floor/concealed fault/two layer confined aquifers/activation and conduction/experimental study分类
建筑与水利引用本文复制引用
张健,郭亮亮,涂坤..煤层底板双承压含水层下隐伏断层活化导水特征试验研究[J].太原理工大学学报,2024,55(2):242-251,10.基金项目
国家自然科学基金资助项目(52379018) （52379018）
中国博士后科学基金资助项目(2020T130390,2019M661053) （2020T130390,2019M661053）
山西省基础研究计划资助项目(20210302124485,202203021211127) （20210302124485,202203021211127）
