摘要
利用数值模拟和相似物理模型方法,讨论了工作面推进过程中围岩应力转移变化规律,得到了压力演化规律和特征.结果表明,工作面开挖后,伴随着应力不断转移和调整,将在采场围岩中形成长轴在采煤工作面走向,短轴在工作面倾向的近似鸡蛋形厚壁压力拱;随着工作面推进距离的加大,压力拱拱体的内边界外移,拱体变厚,拱内围岩应力增加区.
Stress transfer and changes in the rock surrounding a pressure arch are discussed.Numerical and analog material models are presented.The pressure arch in the adjoining rock after coal mining is seen to be approximately egg shaped and a closed,thick wall structure.The long axis is in the direction of the working face and the short axis perpendicular to it.As the driven distance of the working face increases the inner boundary of the pressure arch extends outwards and its body becomes thicker.Stresses in the arch body simultaneously increase.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2011年第6期863-867,共5页
Journal of China University of Mining & Technology
基金
江苏省普通高校研究生科研创新计划项目(CX10B_138Z)
国家自然科学基金项目(50978251)
云南省科技创新基金项目(2010AD006)
关键词
采动动压
压力拱
成拱系数
演化规律
应力集中
dynamic mining pressure
pressure arch
arch-forming coefficient
evolution law
stress concentration
作者简介
杜晓丽(1977-),女,山东省沂南县人,讲师,工学博士,从事岩土工程和防灾减灾工程等方面的研究.E-mail:dxleve@163.com Tel:18255416791