摘要
利用东北大学自行开发研制的岩石破裂过程分析软件(RFPA2D),分析了层状顶板巷道围岩的变形破坏特征,以及不同侧压条件下和不同厚跨比条件下层状顶板的破坏规律.结果表明,水平层状顶板开裂在岩梁中部是由下向上发展的,层状顶板的最终破坏形态与裂纹最终将形成向上扩展的3条主裂纹.随侧压的增大,水平层状岩层的破坏范围逐步减小,顶板岩层的位移逐步减小.岩梁的厚跨比对巷道顶板围岩的最终破坏状态有重要影响.
By using the analyzing code called rock destroy process （RFPA^2D） analysis, the distortion destroy characteristic of tunnel with stratified roof and the destroy rules of tunnel with stratified roof under different lateral pressure and different ratio of thickness to span were analyzed. It can be concluded that the crack extends from the middle of the bottom of the stratified rock upwardly and finally form three main cracks. With the increase of the lateral pressure, the settlement of the stratified roof will decrease and the destroy zone will reduce. The ratio of thickness to span length of the stratified roof is one of the deceive factor to the destroy mode of the stratified roof.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2006年第1期11-15,共5页
Journal of China Coal Society
基金
国家自然科学基金重大资助项目(50490274)
国家自然科学基金资助项目(50374020
50474017
50204003)
辽宁省博士启动基金项目(20021008)
关键词
层状顶板
破坏
数值模拟
stratified roof
rock failure
numerical simulation
