摘要
通过弹性薄板理论,推导出关键层在破断前的载荷及其变形协调条件;应用结构塑性极限分析方法,得到了关键层在破断瞬时的载荷并建立了强度条件.所建立的关键层变形协调及强度判别条件,不仅与煤岩层的密度、厚度和弹性模量有关,而且与工作面宽度、岩层的断裂角和泊松比有关.最后用阳泉某矿的相似模拟实验证明,应用本文建立的判别条件比用传统方法所得到的关键层位置及垮距与实际情况更为吻合.
Through the elastic thin slab theory, the load before key layer breaking and deformable coordination condition were deduced. The load when the key layer breaking instantly and strength condition were obtained by the plastic limit analysis method structure. The conditions of stiffness and strength for key layer were not only related to the unit weigh, thickness and Young＇ s modulus of each rock beam, but also related to the break tangle, Poisson＇ s ratio and face width. At last, the results of position and falling distance of key layer by the paper＇ s distinguishing condition fitter than the tradition method is proved with the physical modeling of a coal mine in Yangquan.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2008年第10期1081-1085,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50574072)
陕西省教育厅专项科研计划资助项目(06JK235)
关键词
弹性薄板
塑性极限分析
关键层判别
elastic thin slab
plastic limit analysis
key layer distinguishing
