煤矿安全2025，Vol.56Issue(3)：197-206,10.DOI:10.13347/j.cnki.mkaq.20231859
地垒构造近距离双煤层开采断层导水规律研究
Study on hydraulic conductivity of faults near double coal seam mining in horst structure
摘要
Abstract
Accurate determination of the hydraulic conductivity of faults represents a pivotal and challenging task in mitigating water-related damage in faults within contemporary engineering practice.At present,the main technical methods to judge fault conductiv-ity are field exploration and theoretical analysis.However,due to the high cost,long time-consuming,and lack of detailed theoretic-al analysis,fault water damage accidents occur frequently during the construction of underground projects.Seven main controlling factors of fault conductivity including aquifer docking ratio(ADR),mudstone smearing factor(SSF),section tightness index(Iσ),mudstone plasticity index(Im),water-rock stress index(Iw),fault distance(Df)and fault inclination angle(θ)were selected and weighted by IFAHP-CRITIC combination.The multi-factor coupling prediction model of fault conductivity is constructed,and a new concept of fault conductivity index is proposed.The model has been successfully applied to the quantitative and fine evaluation of water conductivity of Wangzhuang fault and Xiaosonglou fault in the natural state of Jiangzhuang Coal Mine.By using fluid-struc-ture coupling numerical simulation,the evolution rule of fault conductivity under repeated disturbance of close double coal seam mining in 13 upper 09 and 13 lower 21 working faces is revealed.The results show that most of Wangzhuang faults in the natural state belong to the weak water conductivity area,the strong water conductivity area is mainly located at the elevation of-200 to-350 m in the north of the fault,and the water conductivity of Wangzhuang fault near the mining face is weak.The conductivity of Xiaon-glou fault is zonal and gradually increases from deep to shallow.The conductivity of Xiaosonglou fault near the mining face is weak.There was no obvious disturbance in the fault bundle during the mining of 13 upper 09 working face.It is simulated that local dis-turbance failure occurs in the two faults of 13 upper 09 and 13 lower 21 working faces,but they are not connected with the surround-ing rock failure area of the mining face,and the mining of the working face will not lead to"activate"water inrush.关键词
矿井水害/双煤层开采/断层导水性/定量精细评价/矿井突水/流固耦合模拟Key words
mine water damage/double coal seam mining/fault hydraulic conductivity/quantitatively refined evaluation/mine wa-ter inrush/fluid-solid coupling simulation分类
矿山工程引用本文复制引用
尹会永,冯庆富,董方营,周威,李永杰,王印..地垒构造近距离双煤层开采断层导水规律研究[J].煤矿安全,2025,56(3):197-206,10.基金项目
山东省自然科学基金资助项目(ZR2019MD013) （ZR2019MD013）
