Enhancing mine groundwater system prediction:Full-process simulation of mining-induced spatio-temporal variations in hydraulic conductivities via modularized modeling  

作　　者：Shihao Meng Qiang Wu Yifan Zeng Leiyu Gu 

机构地区：[1]National Engineering Research Center of Coal Mine Water Hazard Controlling,China University of Mining and Technology-Beijing,Beijing 100083,China [2]National Mine Safety Administration Key Laboratory of Mine Water Hazard Controlling,Beijing 100083,China [3]University of Mining and Technology(Beijing)Inner Mongolia Research Institute,Inner Mongolia 017000,China [4]China Huaneng Coal Technology Research Co.,Ltd.,Beijing 100031,China

出　　处：《International Journal of Mining Science and Technology》2024年第12期1625-1642,共18页矿业科学技术学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 42027801, 42072284, and 42372297);the National Key Research and Development Program of China (Nos. 2023YFC3012102 and 2021YFC2902004);the Fundamental Research Funds for the Central Universities (No. 2023ZKPYSH01)

摘　　要：The intricate interplay between rock mechanics and fracture-induced fluid flow during resource extrac-tion exerts profound effects on groundwater systems,posing a pivotal challenge for promoting green and safe development in underground engineering.To address this,a novel numerical model with an explicit coupling simulation strategy is presented.This model integrates distinct modules for individual physical mechanisms,ensuring second-order accuracy through shared time integration,thereby overcoming lim-itations in simulating mining-induced strata damage,water flow,and permeability dynamics.A novel mathematical model is incorporated into the mechanical simulation to characterize the abrupt increase in permeability resulting from rock fracture propagation.This increase is quantified by evaluating the plastic damage state of rocks and incorporating a damage coefficient that is intrinsically linked to rock strength.The mechanical model tracks permeability changes due to mining.The flow model simulates aquifer-mine water interactions by calculating hydraulic conductivity and using dynamic zoning,adapt-ing to mining progress.When applied to a case study of a complex mine,this approach significantly improved the accuracy of water inflow rate predictions by 57%.

关 键 词：Time-dependent permeability Overburden damage Mine water inflow Fluid-mechanical interaction Modular simulation 

分 类 号：TD74[矿业工程—矿井通风与安全] P641.4[天文地球—地质矿产勘探]