摘要
为了有效地进行采动巨厚湿陷性黄土地表裂缝损害的控制和治理，在对西部几个矿区开采地表裂缝破坏调查的基础上，应用概率积分法计算基岩顶界面的应力应变分布规律，分析其与地表裂缝的关系，研究开采引起黄土层地表裂缝产生的机理．结果表明，当基岩顶界面水平变形超过4～5mm／m时，就足以沟通黄土层中的垂直裂隙，黄土层以块体运动形式向上传递而导致地表裂缝产生，给出预计地表裂缝宽度和范围的估算式及其对土地、环境影响的四级危险度评价指标，并以地表塌陷坑的水平投影尺寸、裂缝宽度及台阶高度划分了地表破坏程度的四级指标．
In order to control the surface mining effectively, the distribution rule relation of which and the surface crack crack damage of huge thick collapsib of stress-strain in top interface of the were obtained using the probability le loess caused by base rock and the integral method. The method was based upon observed surface crack damage seen in several mining areas in western China. The results show that the vertical cracks in the loess layer are communicated upward and that the surface cracks are caused by upward transfer of the loess layer in the form of a block. This occurs when the lateral deformation of the base rock at the top interface exceeds 4-5 mm/m. A formula for predicting the width and range of surface cracks is proposed. Four indicators for evaluating the dangers from land and environmental influences are also proposed. The degree of surface damage is characterized by four magnitude indices that are divided by the plane of projection, the crack width and the step height of the collapse pit at the surface.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2008年第1期43-47,共5页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(40572155)
科技部社会公益研究专项基金(2005DIB2J179)
关键词
湿陷性黄土
非连续变形
开采损害
地表沉陷
地表裂缝
collapsible loess
non-continuous deformation
mining damage
surface subsidence
surface crack
