开挖引起巷道变形的弹性软材料物理模拟实验研究  

STUDY OF ROADWAY DEFORMATION INDUCED BY EXCAVATION WITH SOFT ELASTIC MATERIAL SIMULATED EXPERIMENT

作　　者：马凤山[1] 张亚民[1] 徐嘉谟[1] 卢蓉[1] 郭捷[1] 

机构地区：[1]中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室,北京100029

出　　处：《工程地质学报》2017年第5期1344-1350,共7页Journal of Engineering Geology

基　　金：国家自然科学基金项目(41372323;41402280;41372325)资助

摘　　要：通过室内模拟试验的方法再现工程现场的巷道变形现象,是研究巷道变形发生条件和机理的一个重要途径。鉴于传统水平固化法在模拟开挖位移场方面的不足,本文基于成岩地质体无初始应变能的"记忆"固化压力假说,配制超低强度材料,并通过相似理论分析证实了所选材料的可取性。采用竖直固化的方法并利用自制的实验装置,得到具有记忆固化压力的、无初始应变能的模型体,利用该模型可有效模拟材料在固化或固结过程中物理力学性质随深度变化的特性。对此,以金川二矿区14行剖面为原型,模拟了在自重体积力作用下由于双中段开挖引起的巷道变形现象和规律,模拟结果与现场实测以及数值模拟结果相符合。在此基础上,对开挖引起巷道变形现象的发生条件和机理进行了分析。Laboratory simulation experiment is an important method for studying roadway deformation condition and mechanism. Based on the theory of solidification pressure,we built a vertical experimental model used by low strength material. This model,which initial strain energy equaled zero,simulated the solidification pressure. And this model made up for the deficiency of displacement field of horizontal solidification method. According to similarity theory,the material is desirable. In solidification process,this experimental model simulated physical and mechanical property in different depth. The simulated object was ore-body in 14-exploration line used two-sublevel mining under self-weight stress. Experiment results matched numerical simulation. Roadway deformation mechanism has been analyzed based on experiment results and numerical simulation.

关 键 词：地下开挖 巷道变形 弹性软材料 竖直固化法 模拟实验 

分 类 号：TD853[矿业工程—金属矿开采]