煤矿安全2024，Vol.55Issue(3)：209-215,7.DOI:10.13347/j.cnki.mkaq.20230612
综放开采下组煤首采面上覆老空水探查及突水危险性评价
Exploration and water inrush risk assessment of overlying goaf water to the fisrt working face of lower coal group by fully mechanized caving mining
摘要
Abstract
In order to research the water abundance in the goaf area of the upper coal group and the risk of water inrush to the first mining face of the lower coal group,the first mining face of the lower coal group is taken as the research background,and the litholo-gic combination and hydrogeological conditions of the top and floor of the upper and lower coal groups in the research area are sys-tematically analyzed.According to the results of geophysical exploration,20 goaf water boreholes of the upper coal group have been constructed in the roadway of the first mining face of the lower coal group.It is found that the goaf water of upper coal group has the characteristics of large local water volume,high water pressure and uneven water richness.On this basis,the engineering geological numerical model of upper and lower coal seams mining roof and floor is established.The stress field and plastic zone field variation characteristics of upper and lower coal seams after mining are compared and analyzed by numerical simulation method.It is ob-tained that the floor failure depth of upper coal seam is 11.0 m after mining,and the height of water-conducting fracture zone of lower coal seam is 112.0 m after mining.It does not affect the failure depth range of the upper coal floor,which is consistent with the measured water inflow by in situ of the first mining face.Finally,based on the data of the first mining face and two boreholes nearby,the height of the water-conducting fracture zone in the lower group is calculated by analogy using two relevant empirical formulas,and an empirical formula is proposed with high reliability.关键词
上组煤老空水探查/涌水量实测/下组煤综放开采/数值模拟/突水评价Key words
exploration of goaf water in upper group coal/water inflow measurement/fully mechanized caving of lower group coal/numerical simulation/water inrush assessment分类
矿业与冶金引用本文复制引用
史莉红,毛振国,朱术云..综放开采下组煤首采面上覆老空水探查及突水危险性评价[J].煤矿安全,2024,55(3):209-215,7.基金项目
国家自然科学基金面上资助项目(52274243) （52274243）
