采矿与安全工程学报2025，Vol.42Issue(5)：1090-1104,15.DOI:10.13545/j.cnki.jmse.2024.0213
接续工作面开采底板岩层破坏机理及应用研究
Study on failure mechanism and application of floor strata in successive working face
摘要
Abstract
Targeting the problem of confined water inrush from Ordovician limestone in deep coal seam mining in the Weibei Carboniferous-Permian Coalfield,this study took the working face of Dongjiahe Coal Mine as the engineering background.The evolution pattern of floor failure in successive working face was systematically studied by means of theoretical analysis,numerical simulation,and field meas-urement.The theoretical solution of multi-layer floor rock mass fracture shows that the maximum failure depth of the floor of the successive working face is 2.68 m higher than that of the first working face.The numerical simulation indicates that compared to the first working face,the peak value of coal pillar abutment pressure under the condition of successive mining increases markedly,reaching a maximum of 30 MPa,and the plastic zone expands notably.Field acoustic wave test results reveal that the maximum plastic zone length of the section coal pillar is 8.37 m,and the field water pressure test results show that the maximum failure depth of the floor of the 23503 goaf is 15.85 m.Borehole strain measurement data unveil that the maximum failure depth of the floor of the 23502 working face is 18.5 m.Theoretical cal-culations align well with the results of numerical simulations and field measurement.The research results can provide a reference for the safe production of similar deep working faces under pressure.关键词
接续工作面开采/奥灰承压水/底板破坏机理/数值模拟/现场实测Key words
successive working face/Ordovician confined water/floor damage mechanism/numerical simulation/field test分类
矿业与冶金引用本文复制引用
李昂,杨钧皓,王峰,胡晓亮,赵磊,吕光辉,黄刚..接续工作面开采底板岩层破坏机理及应用研究[J].采矿与安全工程学报,2025,42(5):1090-1104,15.基金项目
国家自然科学基金项目(51874229) （51874229）
陕西省自然科学基础研究计划重点项目(2020JZ-52) （2020JZ-52）
