采矿与安全工程学报2017，Vol.34Issue(5)：868-875,8.DOI:10.13545/j.cnki.jmse.2017.05.007
浅埋煤层沟谷径流下开采顶板突水预测分析
Prediction analysis of roof water-inrush in shallow coal seam with surface valley runoff
摘要
Abstract
In order to accurately predict the roof water-inrush disaster in shallow coal seam with sur-face valley runoff, based on the multi-element fitting formulas and the stress and fluid flow coupled system module of finite difference software FLAC3D, this paper provides analyses of water-inrush iden-tification and a simulation modelling prediction work. The fitting formulas show that, under the condi-tion of such geology and topography, the roof water-inrush disaster could easily happen. The FLAC3D numerical simulation analysis indicates that the mining is safe before the working face passing valley area; When it advances to the location below the valley, the connection of fissure zone and valley would lead to a serious roof water-inrush disaster, but the water-resisting property of aquifer shows a weekly "damage-recovery" period in the subsequent mining; When the entire working face pass the valley, the water-resisting property of aquifer is fully recovered. Hence, following the mining damage-recovery law of aquifer, the mitigation measure of water-inrush prevention by setting coal pillar under valley is pro-posed. The results prove that the theoretical identification using stress and fluid flow coupled system in FLAC3D can truly reflect the development of cracking process of mining seepage, which could qualita-tive and quantitative predict the water-inrush.关键词
浅埋煤层/沟谷径流/突水预测/判别公式/数值模拟Key words
shallow coal seam/valley runoff/water inrush prediction/identification formula/numerical simulation分类
矿业与冶金引用本文复制引用
张杰,杨涛,王斌,赵劝,刘东,任延兵..浅埋煤层沟谷径流下开采顶板突水预测分析[J].采矿与安全工程学报,2017,34(5):868-875,8.基金项目
国家自然科学基金项目(51474173,51774229) （51474173,51774229）
