摘要
为了研究松散层在埋深中占比对地表移动变形特征的影响,以赵固矿区地表移动观测数据为基础,研究了松散层占比对地表下沉特征、地表最大下沉速度、地表最大下沉速度滞后距以及地表不同阶段移动持续时间的影响。结果表明在厚松散层条件下,松散层在埋深中占比增大3%,地表下沉系数由0.67增大到0.96,增大近43.3%;地表最大下沉速度系数由1.26增大到1.49,增大近18.4%;地表最大下沉速度滞后距由188 m缩减到97 m,缩短近48.4%,最后通过数值模拟,得出松散层占比对地表移动的一般性规律,并拟合出适合该地质条件的主要移动参数预计公式。
In order to study the influence of loose bed accounted for depth on surface subsidence characteristics in thick unconsol-idated layers, on the basis of the surface movement observation data of Zhaogu Coal Mine Area, the influence of loose bed ac-counted for depth on characteristics of surface subsidence, the maximum ground sinking speed, the maximum ground subsidencevelocity lag distance and the influence of duration of ground surface at different stages was analyzed respectively under the condi-tion of mining under thick unconsolidated layers. It was concluded that under the condition of thick loose bed, with the increase ofloose bed accounted for depth, surface subsidence coefficient increases from 0.67 to 0.96, increasing nearly 43.3%; coefficient ofmaximum subsidence velocity increases from 1.26 to 1.49, increased by 18.4%; the lag distance of maximum subsidence velocityreduced from 188 m to 97 m, by almost 48.4%. At last, through the numerical simulation, the general rule of the ground surfacedisplacement by the proportion of the loose layer was got, and the prediction formula of the main moving parameters which suit forthe geological condition were fitted.
出处
《煤矿安全》
北大核心
2017年第4期211-214,共4页
Safety in Coal Mines
基金
贵州省教育厅自然科学研究资助项目(黔教合KY字[2015]404号)
采矿工程省级特色重点学科资助项目(黔学位合字ZDXK[2015]9号)
贵州省科学技术基金资助项目(黔科合LH字[2014]7465号)
关键词
松散层占比
地表移动变形特征
下沉速度
下沉系数
地表沉降
loose bed accounted for depth
surface movement deformation characteristics
subsidence velocity
coefficient of sur-face subsidence
surface settlement
