| 被动围压条件下岩石材料冲击压缩试验研究 |
| |
| 引用本文： | 平 琦,马芹永,卢小雨,袁 璞.被动围压条件下岩石材料冲击压缩试验研究[J].振动与冲击,2014,33(2):55-59. |
| |
| 作者姓名： | 平 琦 马芹永 卢小雨 袁 璞 |
| |
| 作者单位： | 1．安徽理工大学 矿山地下工程教育部工程研究中心，安徽 淮南 232001;2．安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室，安徽 淮南 232001 |
| |
| 基金项目： | 安徽高校省级自然科学研究重点项目(KJ2013A 085);住房和城乡建设部科学技术项目计划(2012-K4-2);安徽省建设行业科学技术计划项目(2012YF-20) |
| |
| 摘 要： | 为研究煤矿岩石材料被动围压条件下动态力学性能和变形破坏规律，利用Ø50mm变截面分离式Hopkinson压杆(SHPB)试验装置，对45#钢质套筒环向约束状态下煤矿岩石试件进行了不同加载速率冲击压缩试验。试验结果表明：被动围压条件下SHPB试验中，岩石试件的材料延性和抗破坏能力均得到增强，试件轴向应力是采用同种加载条件无围压SHPB试验时的1.2倍，破坏应变比无围压SHPB试验提高2～3倍，且径向应力随轴向应变增大总体呈上升趋势，试件破坏为压剪破坏模式，与无围压SHPB试验有所不同。
|
| 关 键 词： | 岩石力学 被动围压 动态力学性能 冲击载荷 分离式Hopkinson压杆(SHPB) |
| 收稿时间： | 2013-9-16 |
| 修稿时间： | 2013-10-23 |
Impact compression test of rock material under passive confining pressure conditions |
| |
| PING Qi,MA Qin-yong,LU Xiao-yu,YUAN Pu.Impact compression test of rock material under passive confining pressure conditions[J].Journal of Vibration and Shock,2014,33(2):55-59. |
| |
| Authors: | PING Qi MA Qin-yong LU Xiao-yu YUAN Pu |
| |
| Affiliation: | 1. MOE Engineering Research Center of Mine Underground Projects，Anhui University of Science and Technology，Huainan， Anhui 232001，China； 2. Key Laboratory for Coal Mine Safety and Efficient Exploitation Built by Anhui Province and MOE，Anhui University of Science and Technology，Huainan，Anhui 232001，China |
| |
| Abstract: | In order to study the dynamic mechanical properties and failure laws of coalmine rock material under passive confining pressure conditions, Ø50 mm variable cross-section split Hopkinson pressure bar (SHPB) apparatus was used to conduct impact compression tests in different loading rates with 45 # steel sleeve providing constraint conditions. Test results show that ductility and damage resistance of rock material increase under passive confining pressure. The failure axial stress of rock specimens under passive confining pressure is about 1.2 times as large as that without passive confining pressure. And its failure strain is also about 1 to 2 times bigger than without passive confining pressure. The radial stress increases with axial stain growing. The failure mode for rock specimens with or without passive confining pressure is different, with passive confining pressure is compression-shear mode. |
| |
| Keywords: | rock mechanicspassive confining pressuredynamic mechanical propertiesimpact loadsplit Hopkinson pressure bar (SHPB) |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《振动与冲击》浏览原始摘要信息 |
|
点击此处可从《振动与冲击》下载全文 |
