Risk assessment of fault water inrush during deep mining  

作　　者：Zhaodan Cao Qixiong Gu Zhen Huang Jiaju Fu 

机构地区：[1]College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China [2]ZJU-UIUC Institute,Zhejiang University,Haining 314400,China [3]School of Resources and Environment Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China [4]Guiyang Architectural Design and Surveying Prospecting CO.LTD,Guiyang 550082,China

出　　处：《International Journal of Mining Science and Technology》2022年第2期423-434,共12页矿业科学技术学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(No.41702326);the Jiangxi Provincial Natural Science Foundation(No.20202ACB214006);the Innovative Experts,Long-term Program of Jiangxi Province(No.jxsq2018106049);the Supported by Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technology;the Innovation Fund Designated for Graduate Students of Jiangxi Province(No.YC2020-S451)。

摘　　要：With the gradual depletion of shallow coal resources,the Yanzhou mine in China will enter the lower coal seam mining phase.However,as mining depth increases,lower coal seam mining in Yanzhou is threatened by water inrush in the Benxi Formation limestone and Ordovician limestone.The existing prediction models for the water burst at the bottom of the coal seam are less accurate than expected owing to various controlling factors and their intrinsic links.By analyzing the hydrogeological exploration data of the Baodian lower seam and combining the results of the water inrush coefficient method and the Yanzhou mine pressure seepage test,an evaluation model of the seepage barrier capacity of the fault was established.The evaluation results show the water of the underlying limestone aquifer in the Baodian mine area mainly threatens the lower coal mining through the fault fracture zone.The security of mining above confined aquifer in the Baodian mine area gradually decreases from southwest to northeast.By comparing the water inrush coefficient method and the evaluation model of fault impermeability,the results show the evaluation model based on seepage barrier conditions is closer to the actual situation when analyzing the water breakout situation at the working face.

关 键 词：Lower coal seam Mining above confined aquifer Water inrush coefficient Water injection test Impermeability strength Water-inrush in fault 

分 类 号：TD745[矿业工程—矿井通风与安全]