瓦斯压力对煤体动态力学响应特征教学实验设计  

Teaching experiment design of gas pressure on dynamic mechanical response characteristics of coal body

作　　者：刘怀谦 王磊[1] 李少波[1] 王春华 焦振华 袁安营[1] LIU Huaiqian;WANG Lei;LI Shaobo;WANG Chunhua;JIAO Zhenhua;YUAN Anying(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine,Anhui University of Science and Technology,Huainan 232001,China;Guizhou Mine Safety Scientific Research Institute Co.,Ltd.,Guiyang 550025,China;Guizhou Coal Mine Design Research Institute Co.,Ltd.,Guiyang 550025,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001 [2]贵州省矿山安全科学研究院有限公司,贵州贵阳550025 [3]贵州省煤矿设计研究院有限公司,贵州贵阳550025

出　　处：《实验技术与管理》2024年第11期176-185,共10页Experimental Technology and Management

基　　金：安徽省高等学校省级质量工程项目(2023jyxm0041);国家自然科学基金青年项目(52104073);安徽理工大学高层次引进人才科研启动基金项目(2023yjrc141);贵州省科技计划项目(黔科合服企[2022]010)。

摘　　要：煤层开采过程中除受动静载叠加作用外,还受瓦斯压力耦合效应影响,极易诱发煤与瓦斯突出等煤岩瓦斯动力灾害。该文借助自主研制的可视化含瓦斯煤动静组合加载实验系统(SHPB-GAS),设计并开展了不同初始瓦斯压力下煤体动态冲击实验课程教学,阐述了SHPB-GAS实验系统工作原理与构成、设备操作及后期数据处理方法,剖析了瓦斯压力对煤体动态力学响应特征及冲击应变场实时演化特征的影响,探索了“SHPB-GAS+”测试技术在实验教学中的交叉融合运用。该实验教学有助于培养学生理论联系实践的实验思维,有利于构建透过现象看本质的探索精神。[Objective]Coal seams are affected by the coupling effect of gas pressure in addition to static and dynamic superimposed loads in the process of coal mining,which is prone to induce dynamic disasters in gas-bearing coal–rock composites.It not only seriously threatens personnel safety in coal mines but also limits mine production and the development of the national economy.Therefore,based on the current issues in the field of mining engineering,the experimental teaching design of gas pressure on the dynamic mechanical response characteristics of coal samples is conducted to reveal the inducing mechanism of coal and rock gas dynamic disasters.At the same time,it can also achieve the purpose of training the student’s practical ability,cultivating their innovative consciousness and scientific thinking.[Methods]Using a self-developed and observable combined dynamic and static loading test system of gas-bearing coal(SHPB-GAS),the teaching design of the impact experimentation of coal samples under different initial gas pressures is conducted.The working principle and the composition of the SHPB-GAS test system,the equipment operation process,matters that need attention,and post-data evaluation methods,such as intercepted stress wave and stress balance analysis,are clarified.Furthermore,it is innovatively proposed to apply the digital image correlation method(DIC)to the practical teaching design of the gas-containing coal dynamics course.[Results]The teaching design of“SHPB-GAS test technology+DIC”was adopted to analyze the dynamic strength and deformation characteristics of gas-bearing coal.The dynamic response of deformation evolution to gas pressure was expounded,the time-history evolution curve of dissipation energy of gas-bearing coal was divided,and the corresponding relationship between coal deformation and failure stage and energy dissipation and release was established.In addition,the cross-integration application of“SHPB-GAS+CT technology”in experimental teaching was explored,and the characteristics

关 键 词：采矿工程 含瓦斯煤 动态力学响应 CT技术 实验教学 

分 类 号：TD821[矿业工程—煤矿开采] G642[矿业工程—矿山开采]