应变软化巷道围岩弹塑性解析简化的合理性分析  

Rationality Analysis on Elastic-Plastic Analysis Simplification of Strain Softening Roadway Surrounding Rock

作　　者：董海龙 经纬[2] 罗军爱[3] 经来旺 吴骏[1] DONG Hailong;JING Wei;LUO Jun′ai;JING Laiwang;WU Jun(School of Transportation Engineering,Guizhou Institute of Technology,Guiyang 550003,China;Mine Mechanics and Support Technology Institute,Anhui University of Science and Technology,Huainan 232001,China;Guizhou Guineng Investment Joint Stock Company Limited,Liupanshui 553000,China)

机构地区：[1]贵州理工学院交通工程学院,贵阳550003 [2]安徽理工大学矿山工程力学与支护技术研究所,安徽淮南232001 [3]贵州贵能投资股份有限公司,贵州六盘水553000

出　　处：《煤炭技术》2025年第4期1-5,共5页Coal Technology

基　　金：贵州省科学技术厅2022年度基础研究计划(自然科学)项目(黔科合基础-ZK[2022]一般169);2023年贵州理工学院高层次人才科研启动项目(2023GCC040);贵州省公路局科技项目(2023QLK01)。

摘　　要：应变软化模型是巷道围岩弹塑性解析研究中常用的力学模型,从既有文献解析结果出发,结合围岩总荷载不变的规律,剖析了将塑性软化区岩体强度参数常量化进行解析简化的理论不合理性,并通过算例就解析简化与否的结果进行了对比。结果表明:岩体峰残强度差是影响解析简化理论误差的一个主要因素,在峰残强度相差不大的情况下,可进行简化,否则理论误差较大。解析简化虽缺乏理论依据,但因其易于求解,且所得结果偏保守,更有利于保障工程实践的安全,具有一定的工程实用性。Strain softening model is a commonly used mechanical model in the elastic-plastic analysis of roadway surrounding rock.Based on analysis results of existing literature as well as the constant law of total load of surrounding rock,the theoretical irrationality of analysis simplificationis analyzed,where the strength parameters of rock mass in plastic softening zone are considered constants.Then,the results of analytical simplification or not are compared through a calculation instance.Research results indicate that the difference between peak strength and residual strength of rock mass is a major factor affecting the theoretical error of analytical simplification.When the differenceis not too significant,simplification can be carried out,otherwise the theoretical error will be relativelysignificant.Although analytical simplification lacks theoretical basis,it is more conducive to ensuring the safety of engineering practice,so it is easy to be applied in the engineering practices.

关 键 词：应变软化模型 巷道围岩 解析简化 合理性 总荷载不变规律 

分 类 号：TD313[矿业工程—矿井建设]