摘要
地下煤层的开挖可能导致地表建筑物发生变形破坏.以西露天矿开采为工程实例,通过2种不同开采方法的数值模拟,得到了经4步开采后地表的沉降值和水平位移值,并通过"下沉"、"倾斜"、"曲率"、"水平变形"4项指标求得边界角和移动角.研究表明:充填开采可以减小地表下沉量和水平位移,破坏范围最终在N1200 m左右,即露天坑内部,能够有效地保证地表建筑物安全,使得该项工程顺利通过专家论证,对抚顺集团和整个抚顺市都有着重要的经济意义.
The excavation of underground coal seam may lead to deformation and destruction of surface buildings.Taking Xilutian mine as example,according to numerical simulation of two different mining methods,the settlement value and horizontal displacement value of ground surface are obtained,and the boundary angles and moving angles are obtained through four indexes of"subsidence","tilt","curvature"and"horizontal deformation".The study shows that filling mining can reduce the subsidence and horizontal displacement of the surface,and the damage range is around N1 200 m,that is,the interior of open pit,which can effectively ensure the safety of the surface buildings,and make the project pass through the expert demonstration,it has important economic significance for Fushun group and Fushun city.
作者
孙世国
曾志翔
马银阁
江俊
SUN Shi-Guo;ZENG Zhi-xiang;MA Yin-ge;JIANG Jun(School of Civil Engineering,North China University of Technology,Beijing 100144,China)
出处
《煤炭技术》
CAS
2019年第7期15-18,共4页
Coal Technology
基金
国家自然科学基金项目(41772335)
科技创新能力建设(PXM2017-014212-000015)
基本科研业务费(PXM2018-014212-000011)
国家重点研发计划课题(2016YFC0701810)
关键词
数值模拟
地表变形
破坏范围
开采方法
numerical simulation
surface deformation
scope of destruction
mining method
