摘要
本文介绍了近年来我国华东矿区深厚表土层中煤矿立井井壁非采动破裂的特点。分析了井壁破裂的工程地质条件，研究了井壁与土接触面上土─混凝土作用变形和强度参数，并将该接触面视为接触面单元，用弹塑性有限元法，模拟了深厚表土底部含水层失水时土与井壁的相互作用，得到了井壁附加应力随深度和含水层水头降的变化规律，分析了井壁稳定性，揭示了井壁破裂的内在机理。
In this paper,the characterics of the rupture of coal mine shaft wall in thick surface soils occured in East China recently are described. The engineering gelogical conditions of rupture of shaft wall are analysed. The parameters of deformation and strength of soil-concrete interaction on the interface of soil and shaft wall are studied. Moreover,regarding the interface of soil and shaft wall as interface elements,using elastic-plastic FEM,the interaction between soil and shaft wall due to the bottom aquifer losing water is modelled, the variation laws of the additional stresses of shaft wall with depth and water lowering of the bottom aquifer are obtained,and the inherent mechanism of the rupture of shaft wall is revealed.
出处
《工程地质学报》
CSCD
1995年第1期45-55,共11页
Journal of Engineering Geology
关键词
煤矿
竖井井筒
井壁
破裂
表土
Thick surface soils,Engineering Geological conditions,Soil-concrete interaction,Interface element,Additional stress shaft wall,Rupture.
