煤矿安全2025，Vol.56Issue(2)：185-194,10.DOI:10.13347/j.cnki.mkaq.20240030
采空区覆岩导水裂隙带发育高度及其渗透性规律研究
Study on development height and permeability laws of water-conducting fracture zone in overlying strata of goaf
摘要
Abstract
In order to construct an underground water reservoir for storing high-salinity water and achieve zero discharge through the treatment of highly mineralized mine water,it is necessary to accurately evaluate the permeability coefficient of the overlying strata aquifer in the goaf,taking the storage of high-salinity water in Lingxin Coal Mine as a research object,combined with rock mechan-ics and hydro-geological parameters,FLAC3D finite difference software was used to conduct numerical simulations using Mohr-Cou-lomb constitutive model as a plastic yield criterion for rock and soil bodies.The development height of collapse zone and fracture zone during the mining process of L1614 working face in 14#coal seam in No.1 mining area of Lingxin Coal Mine were determined.Based on numerical simulation results,porosity and permeability coefficients of collapse zone and fracture zone were calculated,the transverse and longitudinal distribution of permeability in the water-conducting fracture zone is analyzed.The results show that the horizontal distribution of porosity and permeability coefficient in caving zone of 14#coal after mining is similar,showing a"basin"shape,with the largest near the coal wall and the smallest in the central part.The development height of the water-conducting frac-ture zone is 56 m,and that of the caving zone is 15 m.The longitudinal permeability coefficient of the water-conducting fracture zone increases gradually from top to bottom,ranging from 1.07×10-6 to 0.89 m/s,and the average permeability coefficient of the cav-ing zone is 0.89 m/s.关键词
矿井水灾/地下水库/导水裂隙带/渗透系数/高盐水存储/数值模拟Key words
mine flood/underground reservoir/water-conducting fracture zone/permeability coefficient/high-salt water storage/numerical simulation分类
矿业与冶金引用本文复制引用
祝蓬,李旭,陈要平,蒯大伟,郭强..采空区覆岩导水裂隙带发育高度及其渗透性规律研究[J].煤矿安全,2025,56(2):185-194,10.基金项目
国家自然科学基金资助项目(42102293) （42102293）
合肥综合性国家科学中心能源研究院(安徽省能源实验室)资助项目(21KZS217) （安徽省能源实验室）
安徽省自然科学基金资助项目(2108085QD165) （2108085QD165）
安徽理工大学矿井水害综合防治煤炭行业工程研究中心开放基金资助项目(2022-CIERC-02) （2022-CIERC-02）
