基于尖点突变模型的巷道围岩屈曲失稳规律研究  

Study on buckling instability of surrounding rock based on cusp catastrophe model

作　　者：李明[1] 茅献彪[1,2] 茅蓉蓉[1,3] 陶静[2] 

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,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116 [3]南通航运职业技术学院船舶工程系,江苏南通226010

出　　处：《采矿与安全工程学报》2014年第3期379-384,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(2010CB226800);国家自然科学基金项目(51104128;51227003;U1261201);教育部博士点基金项目(20120095110013);江苏省高校研究生创新基金项目(CXLX13_935)

摘　　要：依据深部巷道围岩的稳定性特征,探讨了巷道围岩层裂板结构的形成机理,并建立了层裂板结构稳定性的力学模型。应用结构非线性稳定性的尖点突变模型,分析了巷道围岩层裂板结构失稳的力学机制,给出了2种条件下巷帮层裂板结构失稳的充要条件。研究表明:尖点突变模型能有效地预测片帮型煤矿巷道的冲击矿压危险性;通过加固巷帮及巷道顶底角围岩,提高巷帮围岩的结构刚度,增强巷帮围岩的抗屈曲失稳能力,可有效防治片帮型煤矿巷道的冲击矿压事故。Based on the stability characteristics of surrounding rock of deep roadway, the forming mechanism and stable mechanics model of crack plate structure are studied. With the application of cusp catastrophe model on nonlinear stable structure, the instability property of crack plate structure is analysized and the necessary and sufficient conditions under two different cases is put forward. The study proves that the catastrophe theory can effectively predict the dangerousness of slough roadway rock burst. By reinforcing surrounding rock on the top and bottom corner, the stiffness of surrounding rock is increased and its anti-buckling capacity is also enhanced, therefore rock-burst accident in spall-ing-type coal mine tunnel can be effectively prevented.

关 键 词：巷道围岩层裂结构 稳定性 尖点突变模型 冲击矿压 

分 类 号：TD324[矿业工程—矿井建设]