摘要
以河南义马常村煤矿掘前预采卸压试验的21盘区延深下山为研究对象,采用Bingham硬化模型及德鲁克-普拉格屈服准则,利用二维弹-黏塑性有限元理论进行数值模拟,揭示出巷道围岩变形随时间的变化规律,确定了巷道合理支护时间,并对巷道围岩支护参数进行了敏感性分析,揭示出围岩支护参数对巷道围岩稳定性的影响.模拟结果表明,将二维弹-黏塑性有限元理论用于软岩巷道的优化设计具有重要意义.
The deformation-time law of roadway of Changcun coal mine in Henan province was simulated by means of 2D elasto-visco-plastic finite element theory with the Bingham hardening model and Drucker-Prager yield rule criterion. The rational support time of soft rock roadway was determined, and the sensitivity of some parameters was analyzed. In addition, the influence of support parameters on the stability of surrounding rock was also revealed. The results show that the application of 2D elasto-visco-plastic finite element theory in optimization of support parameters is quite significant.
出处
《采矿与安全工程学报》
EI
北大核心
2006年第1期103-106,共4页
Journal of Mining & Safety Engineering
关键词
掘前预采
弹-黏塑性
合理支护时间
参数敏感性
pre-mining before diggingl elasto-visco-plastic
rational support time
parameter sensitivity
