渗流-应力耦合下的裂隙岩体劈裂模型研究  

Research on splitting failure model of fractured rock mass under the coupling effect of seepage-stress

作　　者：聂韬译[1] 浦海[1] 刘桂宏[1] 肖成[1] 倪宏阳 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,力学与建筑工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2015年第6期1026-1030,1036,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2015CB251601,2013CB227900);国家自然科学基金项目(51322401,U1261201);中国矿业大学中央高校基本科研业务费专项资金项目(2014YC09,2014ZDPY08);国家创新研究群体科学基金项目(51421003);江苏省双创团队项目

摘　　要：针对渗流-应力耦合作用下裂隙岩体的劈裂破坏现象,首先采用流固耦合理论计算单元应力,其次从微裂隙的萌生、扩展、聚合规律出发,采用双曲线模拟翼裂纹扩展路径,考虑翼裂尖端II型应力强度因子对扩展路径的影响,建立了渗流-应力耦合作用下基于曲线扩展路径的劈裂演化模型。利用Fish语言,通过对FLAC3D的二次开发,实现了新模型的程序化。将新模型与Lajtai经验公式相比对,发现两者计算结果接近,验证了新模型的正确性。In response to the splitting failure of fractured rock mass under coupling effect of seepage-stress, the theory of fluid-solid coupling is firstly used to calculate the element stress. Then based on the rule of initiation, extension, coalescence of microcracks, the hyperbolic curve is applied to simulate the wing crack propagation path. In view of the effect of mode II stress intensity near microcrack tip on propagation path, a splitting failure model is established based on a curve propagation path under the coupling effect of seepage-stress. Fish language is utilized to program the new method through the secondary development of FLAC3 D. Compared with Lajtai empirical formula, the results of new model are consistent with Lajtai empirical results.

关 键 词：流固耦合 应力强度因子 劈裂演化模型 翼型裂纹 

分 类 号：TD322[矿业工程—矿井建设]