摘要
利用考虑中间主应力的Hoek-Brown强度准则,结合巷道围岩塑性解的推导方法,进而获得较为准确的巷道围岩塑性区的范围以及支护变形量。通过理论推导了巷道围岩塑性区的半径和位移的表达式,得出塑性解与围岩初始二向等压应力、岩体质量、地质工程参数以及支护反力有关。结论为考虑中间主应力的Hoek-Brown强度准则更加适应巷道围岩塑性区分析过程,获得的结果更加准确,对工程实践有一定的理论指导意义。
The range of plastic zone and support deformation of the surrounding rock of roadway are obtained by combining with the derivation method of plastic solution of surrounding rock of roadway and the Hoek Brown strength criteria considering the intermediate principal stress. According to the results of the theoretical derivation, radius of plastic zone of surrounding rock of roadway and the expression of dis- placement are acquired. In addition, the plasticity index has the relationship with the initial two-dimen- sional compressive stress of surrounding rock, rock mass quality, parameters of geological engineering and the supporting reaction force. The Hoek-Brown strength criteria considering the intermediate principal stress has the qualification to analyze the plastic zone of surrounding rock of roadway so as to acquire more accurate results. Therefore, the above research results is conducive to the engineering practice.
出处
《现代矿业》
CAS
2014年第2期78-80,89,共4页
Modern Mining
基金
国家自然科学基金项目(编号:51174005/51074005/51134012)
教育部科学技术研究重点项目(编号:KJ2011A085)
