中国地质灾害与防治学报2012，Vol.23Issue(2)：44-49,6.
近地表上覆岩层直壁塌陷机理及稳定性分析
Mechanism of collapse of straight part and stability analysis for near-surface strata
李庶林 1王伟 1林建宁1
作者信息
- 1. 厦门大学建筑与土木工程学院,福建厦门361005
- 折叠
摘要
Abstract
Geological conditions of strata, properties of rocks, and results of classification of rock masses at Chuankou Wolfram mine are introduced briefly. Bases on the in-situ investigation and survey in underground, the comparison sketch of boundary of underground excavating opening and the collapse border of surface is presented; and caving characteristics is analyzed and a typical collapse of straight part of covering strata is proved. According to the different ratings of joint-fissure between country rockmass of opening and covering strata, Terzaghi＇s theory is used to explain the mechanism and fracturing characteristics of country rockmass surrounding the opening and covering strata. Then Terzaghi＇s theory is improved according to the properties of rockmasses, and pressure formula is derived ; for the more, limited equilibrium method is employed for analyzing the stability of covering strata with different mining spans. On condition that the collapse does not occur, the quantitative relationships between safe mining spans and coefficients with different heights of covering strata.关键词
地下采空区/上覆岩层/直壁塌陷/稳定性分析Key words
underground mining cave/covering-strata/collapse of straight part/stability analysis分类
天文与地球科学引用本文复制引用
李庶林,王伟,林建宁..近地表上覆岩层直壁塌陷机理及稳定性分析[J].中国地质灾害与防治学报,2012,23(2):44-49,6.
