煤矿采矿围岩压力拱的演化特征数值模拟研究  

Numerical simulation of the evolution of the pressure arch during coal mining

作　　者：杜晓丽[1,2] 宋宏伟[1] 陈杰[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221116 [2]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《中国矿业大学学报》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)

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.

关 键 词：采动动压 压力拱 成拱系数 演化规律 应力集中 

分 类 号：TU457[建筑科学—岩土工程]