晶须复合纤维EGC抗大变形性能研究  

Study on resistance to large deformation of EGC materials with whisker composite fibers

作　　者：张建国 吴阳 杨战标 丁汉林 ZHANG Jianguo;WU Yang;YANG Zhanbiao;DING Hanlin(State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,Pingdingshan 467000,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;China Pingmei Shenma Group Energy Chemical Industry Research Institute,Pingdingshan 467099,China)

机构地区：[1]炼焦煤资源开发及综合利用国家重点实验室,河南平顶山467000 [2]中国矿业大学力学与土木工程学院,江苏徐州221116 [3]中国平煤神马集团能源化工研究院,河南平顶山467099

出　　处：《煤矿安全》2021年第1期83-87,共5页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2017YFC0804209);国家自然科学基金青年科学基金资助项目(51404255)。

摘　　要：为了满足深部大变形工况对混凝土类支护材料柔性的要求,使用国产原料制作了复合纤维EGC材料。通过试件试验,获得了复合纤维EGC材料本构;使用COMSOL对U型钢与EGC材料支护时的收敛特性进行了数值计算。通过对模拟结果的分析发现:在使用普通混凝土支护时,直墙底与拱顶处混凝土易发生破坏,使用U型钢与普通混凝土支护对该现象改善不佳,而所制作的EGC材料能够适应该工况。通过研究,获得了掺入CaSO_(4)晶须的EGC材料本构,讨论了EGC材料对大变形工况的适应性。In order to meet the requirements for the flexibility of concrete support materials in deep and large deformation conditions, composite fiber EGC materials were produced by using domestic raw materials. Through the experiment of the specimen, the composite fiber EGC material constitutive was obtained. The convergence characteristics of U-shaped steel and EGC materials were numerically calculated by using COMSOL. Analysis of the simulation results shows that when ordinary concrete support is used, the concrete at the bottom of the straight wall and the vault is prone to damage. U-shaped steel and ordinary concrete supports have not improved the phenomenon, and the EGC material produced can adapt to the operating conditions.Through the study in this paper, the constitutive structure of EGC materials with CaSO_(4) whiskers was obtained, and the adaptability of EGC materials to large deformation conditions was discussed.

关 键 词：CASO4晶须 EGC 纤维增韧 大变形研究 数值模拟 支护材料 巷道支护 

分 类 号：TD353.3[矿业工程—矿井建设]