辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(12)：1264-1269,6.DOI:10.11956/j.issn.1008-0562.2017.12.006
不同采出率下覆岩移动的数值模拟
Numerical simulation of overburden movement under different recovery rate
摘要
Abstract
In order to accurately and effectively understand the mechanism of overlying strata movement with strip mining,this paper used the FLAC3D software to simulate the mechanism of goaf overburden deformation propagation of NO.12 seam by the recovery rate in different mining conditions,which is located in NO.12 mining area of the North of Xima coal mine,under the village of Xi Shanggangzi in Dengta,Liaoning.The vertical and horizontal displacement curves were obtained by setting measuring points of goaf overlying strata and the corresponding surface.The results of study show that with the recovery rate increases from 40％ to 50％,then to 60％,the maximum vertical displacement increment at mining goaf roof measuring point is 51.51mm and 119.56mm respectively,and the corresponding surface and the maximum vertical displacement increment is 17.38mm and 65.67mm respectively.The horizontal displacement is similar with the vertical displacement,but it is relatively small in the mining area;when the recovery ratio is constant in the same displacement observation lines,the corresponding measuring points displacement of roof in mined-out area is higher than that of coal pillar roof,and this elevation trend gradually weakens toward the surface.Finally,by fitting the relationship between the vertical displacement and the recovery ratio,this study obtained the maximum vertical displacements of goaf roof and the corresponding surface increase relation with the recovery ratio in the form of power function.关键词
条带开采/覆岩移动规律/不同采出率/位移测点/拟合分析/幂函数增长Key words
strip mining/law of overlying strata movement/different recovery rate/displacement measuring point/fitting analysis/power function growth分类
矿业与冶金引用本文复制引用
杨逾,王宇..不同采出率下覆岩移动的数值模拟[J].辽宁工程技术大学学报（自然科学版）,2017,36(12):1264-1269,6.基金项目
国家自然科学基金(51274111):辽宁省博士后集聚工程项目(2011921029) （51274111）
